CN115009885B - Fault monitoring method and device for ore tank discharging and dust removing system - Google Patents

Fault monitoring method and device for ore tank discharging and dust removing system Download PDF

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Publication number
CN115009885B
CN115009885B CN202210777424.3A CN202210777424A CN115009885B CN 115009885 B CN115009885 B CN 115009885B CN 202210777424 A CN202210777424 A CN 202210777424A CN 115009885 B CN115009885 B CN 115009885B
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pressure
dust
groove
dust removing
ventilation groove
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CN115009885A (en
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李小川
周福宝
张明瑞
杨轩
刘欣
彭泽银
何新建
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Jiangsu Shian Health Science And Technology Research Institute Co ltd
China University of Mining and Technology CUMT
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Jiangsu Shian Health Science And Technology Research Institute Co ltd
China University of Mining and Technology CUMT
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
    • B65G69/18—Preventing escape of dust
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

The invention discloses a fault monitoring and controlling device of an ore tank unloading and dust removing system, the ore tank unloading and dust removing system and a fault monitoring method of the ore tank unloading and dust removing system, wherein the fault monitoring and controlling device comprises a dust removing channel, and the dust removing channel defines a closed ventilation groove; a dust-removing vehicle configured to be communicable with the ventilation slot during movement; a dust remover; the pressure sensors can detect the pressure at the positions of the ventilation grooves; the distance measuring device is arranged on the dust removing vehicle to measure the distance between the dust removing vehicle and the dust remover; and the control assembly is connected with the plurality of pressure sensors, the distance measuring device and the dust remover respectively and compares the detection pressure of the pressure sensors and the distance signal of the distance measuring device with the reference pressure to monitor faults. The fault monitoring and controlling device provided by the embodiment of the invention has the advantages of simple structure, easiness in installation and use, reliable fault monitoring result, accurate positioning and high stability.

Description

Fault monitoring method and device for ore tank discharging and dust removing system
Technical Field
The invention relates to the technical field of dust control of production workshops, in particular to a fault monitoring and controlling device of an ore tank unloading and dust removing system, the ore tank unloading and dust removing system and a fault monitoring method of the ore tank unloading and dust removing system.
Background
The ore tank discharging workshop is widely used in steel plants and is used for the production links of continuous discharging, leveling and the like of a plurality of ore bins. Due to the reasons of large dust content of sinter, large fall of materials, continuous operation and the like, the dust removal pressure of a workshop is huge.
In the prior art, a dust hood is usually arranged on a discharge trolley, and dust-containing air flow is conveyed to a dust remover through a dust removing vehicle and a ventilation groove to carry out dust removing treatment, such as ZL201821339696.0, and a mode that the dust remover synchronously runs along with the discharge trolley is also adopted in some schemes, such as ZL200620076303.2, ZL201310127255.X and ZL201410303004.7, but the whole system is complex, the failure rate is high, and the application is relatively less.
Moreover in above-mentioned scheme, the ventilation groove is mostly open structure, and the top covers the belt and seals, and the ventilation dust removal car sets up the rubber roll and can open the belt everywhere and realize dusty air current and transport in succession, nevertheless has following problem in practical application in-process usually: firstly, effective monitoring and control means, fault alarming and positioning schemes are lacked, unified regulation and control cannot be achieved in time, and once faults such as belt deviation and the like occur in the ventilation grooves, the faults are difficult to position, and the maintenance progress is slow; secondly, even if the partial scheme adopts a video sensing visual identification technology for monitoring, the identification effect is poor due to a high dust concentration environment, image processing and identification failure are easily caused by dust deposition, and the number of cameras required by a machine visual technology is large due to a long ventilation slot, so that the camera is high in price and inconvenient to install and use; thirdly, besides poor monitoring effectiveness, the actual dust removal working frequency is lack of regulation and control in the operation process of the dust removal vehicle, and the dust remover usually runs at full load, so that the problems of high energy consumption, easy equipment loss, short service life and the like are caused.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, one objective of the present invention is to provide a fault monitoring and controlling device of a mine chute discharging and dust removing system, which has a simple structure, is easy to install and use, and has reliable fault monitoring result, accurate positioning and high stability.
The invention also provides a fault monitoring and controlling device adopting the ore tank unloading and dust removing system.
The invention also provides a fault monitoring method of the fault monitoring and controlling device adopting the ore tank discharging and dust removing system.
The fault monitoring and control device of the ore tank unloading and dust removing system comprises a dust removing channel, wherein the dust removing channel is arranged adjacent to an ore tank and defines a closed ventilation tank, and the dust removing channel is provided with a dust removing track; the dust removing vehicle is movably arranged on the dust removing track and is provided with a dust inlet and a dust outlet, and the dust outlet can be communicated with the ventilation groove in the moving process; the dust remover is arranged at one end of the dust removing channel and is communicated with the ventilation groove so as to remove dust in the ventilation groove; the pressure sensors are arranged at intervals along the extending direction of the ventilation groove, and each pressure sensor can detect the pressure at the position of the ventilation groove; the distance measuring device is arranged on the dust removing vehicle to measure the distance between the dust removing vehicle and the dust remover; and the control assembly is internally pre-stored with reference pressure, is respectively connected with the pressure sensors, the distance measuring device and the dust remover and compares the detection pressure of the pressure sensors, the distance signal of the distance measuring device and the reference pressure to monitor faults.
According to the fault monitoring and controlling device of the ore bin discharging and dust removing system, the pressure sensors are arranged at intervals in the extending direction of the ventilation slot, the reference pressure at different positions in the ventilation slot is preset in the control assembly, and the control assembly is connected with the pressure sensors and the distance measuring device, so that the fault monitoring is carried out on the states in the ventilation slot under different working conditions and at different positions according to the detected pressure, distance signals and the like.
According to some embodiments of the invention, the reference pressure comprises a first reference pressure, and the first reference pressure satisfies: p = a 1 L 2 +a 2 L+a 3 Wherein a is 1 ＝-0.1～-0.08，a 2 ＝14.5～15.5，a 3 = -1000 to 0,P is the reference pressure of any position pressure sensor in the ventilation groove, L is the distance between the any position pressure sensor and the dust remover, and a 1 、a 2 、a 3 The pressure sensors are obtained by calculating the detection pressure of any three pressure sensors and the corresponding distance value L.
According to some examples of the invention, when the fluctuation of the detected pressure at any position in the ventilation groove is less than 50Pa, the control assembly prompts the ore groove unloading and dust removing system to normally operate; when the fluctuation of the detection pressure at any position in the ventilation groove is larger than 50Pa, the detection pressure at the position is compared with the first reference pressure at the position, and when the detection pressure at the position is larger than the first reference pressure at the position, the control component prompts the position of the ventilation groove to leak air.
According to some embodiments of the invention, the reference pressure comprises a second reference pressure, and the second reference pressure satisfies:
P1＝a 1 L 1 2 +a 2 L 1 +a 3 wherein a is 1 ＝-0.1～-0.08，a 2 ＝14.5～15.5，a 3 ＝-1000～0；
P2＝k 1 L 2 +b 1 Wherein k is 1 ＝-20～-15，b 1 ＝-45～-40；
P3＝k 2 L 3 +b 2 Wherein k is 2 ＝240～255，b 2 ＝-9200～-8900；
P4＝k 3 L4+b 3 Wherein k is 3 ＝0.95～1.15，b 3 ＝-400～-350；
Wherein P1 is one of the ventilation grooves back to the dust removing vehicleA reference pressure in the side groove section, L1 is the distance between any position pressure sensor in the groove section of one side of the ventilation groove back to the dust removing vehicle and the dust remover, and a 1 、a 2 、a 3 Through the back of ventilation groove in the tank section of one side of dust removal car pressure sensor's detection pressure and its corresponding distance value calculation obtain, P2, P3 are that ventilation groove is close to the reference pressure in the tank section of dust removal car position, L2, L3 are that ventilation groove is close to arbitrary position pressure sensor in the tank section of dust removal car position is apart from the distance of dust remover, k 1 、b 1 、k 2 、b 2 The detection pressure of the pressure sensor in the groove section of the position where the dust removing vehicle is located is obtained through calculation of the corresponding distance value of the pressure sensor, P4 is reference pressure between the dust removing vehicle and the dust remover in the groove section of the ventilation groove, L4 is the distance between the dust removing vehicle and the dust remover from the pressure sensor at any position in the groove section of the ventilation groove, and k is the distance between the dust removing vehicle and the dust remover 3 、b 3 And the pressure sensor is used for detecting the pressure of the air duct between the dust removing vehicle and the dust remover.
According to some examples of the invention, when the fluctuation of the detected pressure at any position in the ventilation groove is less than 50Pa, the control assembly prompts the ore groove unloading and dust removing system to normally operate; when the fluctuation of the detection pressure of any position in the groove section of one side of the ventilation groove, which is back to the dust removal vehicle, is greater than 50Pa, comparing the detection pressure of the position with the second reference pressure of the position, and when the detection pressure of the position is greater than the second reference pressure of the position, prompting the position of the ventilation groove to leak air by the control assembly; when the fluctuation of the detection pressure at any position in the groove section of the ventilation groove between the dust removing vehicle and the dust remover is larger than 50Pa, the detection pressure at the position is compared with the second reference pressure at the position, and when the detection pressure at the position is larger than the second reference pressure at the position, the control component prompts air leakage at the position of the ventilation groove.
According to some examples of the invention, the reference pressure in the section of the ventilation slot adjacent to the location of the dust removal vehicle is in a decreasing and increasing trend.
According to some examples of the invention, a trend of a reference pressure change in a groove section of the ventilation groove adjacent to a position where the dust removal vehicle is located is substantially in a shape of a "√".
According to some embodiments of the invention, the fault monitoring and control device of the ore tank discharging and dust removing system further comprises a frequency conversion device, and the frequency conversion device is respectively connected with the control component and the dust remover so as to dynamically control the working frequency of the dust remover according to the control signal of the control component.
According to some embodiments of the invention, when the detected pressure in the section of the ventilation slot adjacent to the location of the dust removal vehicle is greater than a preset dust removal pressure P Preset of When the dust remover works, the control component controls the frequency conversion device to increase the working frequency of the dust remover; when the detection pressure in the groove section of the ventilation groove adjacent to the position of the dust removing vehicle is less than the preset dust removing pressure P Preset of When the dust remover works, the control component controls the frequency conversion device to reduce the working frequency of the dust remover, wherein the preset dust removing pressure P Preset of Satisfies the following conditions: -350 Pa.ltoreq.P Preset ≤-650Pa。
According to some examples of this invention, the preset dust removal pressure P is set to be lower than the preset dust removal pressure P Preset of Is 500Pa.
According to some embodiments of the invention, the fault monitoring and control device of the ore tank discharging and dedusting system further comprises a discharging car, the discharging car is movably arranged at the top of the ore tank, a dust outlet of the discharging car is communicated with the dust inlet of the dedusting car through a pipeline, and the dedusting car moves synchronously with the discharging car.
According to some embodiments of the invention, the fault monitoring and control device of the mine pit discharging and dust removing system further comprises a plurality of in-place switches, and the in-place switches are arranged at intervals along the extending direction of the ventilation slot.
According to the ore tank discharging and dust removing system of the embodiment of the second aspect of the invention, the fault monitoring and control device of the ore tank discharging and dust removing system of the embodiment of the first aspect of the invention is adopted.
According to the ore tank discharging and dust removing system provided by the embodiment of the invention, the fault monitoring and control device of the ore tank discharging and dust removing system provided by the embodiment of the first aspect of the invention has the characteristics of simple structure, easiness in installation and use, reliable fault monitoring result, accurate positioning, high stability and the like.
According to the fault monitoring method of the ore tank discharging and dust removing system in the third aspect of the invention, the ore tank discharging and dust removing system adopts the fault monitoring and controlling device of the ore tank discharging and dust removing system in the first aspect of the invention, and the fault monitoring method comprises the following steps: s1, pre-storing reference pressures at different positions in a ventilation groove, wherein the reference pressures comprise a first reference pressure under the operating condition of a non-dust-removing vehicle and a second reference pressure under the operating condition of a dust-removing vehicle; s2, detecting the detection pressure at the position where the pressure sensors are located by the plurality of pressure sensors respectively; s3, comparing the detection pressure in the step S2 with the reference pressure at the corresponding position prestored in the step S1; and S4, when the detected pressure at any position in the ventilation groove in the step S2 is greater than the reference pressure at the corresponding position in the ventilation groove prestored in the step S1, prompting that the position in the ventilation groove has an air leakage fault.
According to the fault monitoring method of the ore tank discharging and dust removing system, the reference pressures of different positions in the ventilation tank are prestored, the pressure detection is carried out on the different positions, and the detection pressures under different working conditions are compared with the reference pressures, so that the fault monitoring is carried out on the states in the ventilation tank under different working conditions and different positions.
According to some embodiments of the invention, the first reference pressure satisfies: p = a 1 L 2 +a 2 L+a 3 Wherein a is 1 ＝-0.1～-0.08，a 2 ＝14.5～15.5，a 3 = -1000 to 0,P is the reference pressure of the pressure sensor at any position in the ventilation groove, L is the distance between the pressure sensor at any position and the dust remover, and a 1 、a 2 、a 3 The pressure sensors are obtained by calculating the detection pressure of any three pressure sensors and the corresponding distance value L.
According to some embodiments of the invention, said step S3 comprises: s31, when the fluctuation of the detection pressure at any position in the ventilation groove is smaller than 50Pa, prompting the normal operation of the ore groove discharging and dedusting system.
According to some embodiments of the invention, said step S4 comprises: s41, when the fluctuation of the detection pressure at any position in the ventilation groove is larger than 50Pa, comparing the detection pressure at the position with the first reference pressure prestored at the position in the step S2, and when the detection pressure at the position is larger than the first reference pressure at the position, prompting air leakage at the position of the ventilation groove.
According to some embodiments of the invention, the second reference pressure satisfies:
P1＝a 1 L 1 2 +a 2 L 1 +a 3 wherein a is 1 ＝-0.1～-0.08，a 2 ＝14.5～15.5，a 3 ＝-1000～0；
P2＝k 1 L 2 +b 1 Wherein k is 1 ＝-20～-15，b 1 ＝-45～-40；
P3＝k 2 L 3 +b 2 Wherein k is 2 ＝240～255，b 2 ＝-9200～-8900；
P4＝k 3 L4+b 3 Wherein k is 3 ＝0.95～1.15，b 3 ＝-400～-350；
Wherein, P1 is the reference pressure in the groove section at one side of the ventilation groove back to the dust removal vehicle, L1 is the distance between the pressure sensor at any position in the groove section at one side of the ventilation groove back to the dust removal vehicle and the dust remover, a 1 、a 2 、a 3 Through the back of the ventilation groove to remove dustThe detection pressure of the pressure sensor in the groove section on one side of the vehicle and the corresponding distance value are calculated, P2 and P3 are reference pressures in the groove section of the position where the dust removing vehicle is located and the ventilation groove is adjacent, L2 and L3 are the distance between the pressure sensor and the dust remover, k, of any position in the groove section of the position where the dust removing vehicle is located and the ventilation groove is adjacent 1 、b 1 、k 2 、b 2 The detection pressure of the pressure sensor in the groove section of the position where the dust removing vehicle is located is obtained through calculation of the corresponding distance value of the pressure sensor, P4 is reference pressure between the dust removing vehicle and the dust remover in the groove section of the ventilation groove, L4 is the distance between the pressure sensor and the dust remover in any position between the dust removing vehicle and the dust remover in the groove section of the ventilation groove, and k is the distance between the pressure sensor and the dust remover 3 、b 3 And the pressure value is obtained by calculating the detection pressure of the pressure sensor in the groove section of the ventilation groove between the dust removing vehicle and the dust remover and the corresponding distance value.
According to some embodiments of the invention, said step S3 comprises: s31, when the fluctuation of the detection pressure at any position in the ventilation groove is smaller than 50Pa, prompting the normal operation of the ore groove discharging and dedusting system.
According to some embodiments of the invention, said step S4 comprises: s41, when the fluctuation of the detection pressure at any position in the ventilation groove is larger than 50Pa, comparing the detection pressure at the position with the second reference pressure prestored at the position in the step S2, and when the detection pressure at the position is larger than the second reference pressure at the position, prompting the air leakage at the position of the ventilation groove.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of a fault monitoring and control device of a mine chest discharge dedusting system in accordance with an embodiment of the present invention;
FIG. 2 is a pressure distance curve of the fault monitoring and controlling device of the ore bin discharging and dust removing system according to the embodiment of the invention under different working frequencies of the dust remover under the working condition of no dust removing vehicle;
FIG. 3 is a pressure distance curve of a fault monitoring and controlling device of the ore tank discharging and dust removing system under the operating condition of a non-dust removing vehicle under the condition of G point leakage fault according to the embodiment of the invention;
fig. 4 is a pressure distance curve of the fault monitoring and controlling device of the ore bin discharging and dust removing system according to the embodiment of the invention under the operation condition of the dust removing vehicle.
Reference numerals: 0-1: a ventilation slot; 0-2: a dust removal vehicle; 0-3: a dust remover; 1-1: a pressure sensor; 1-2: an in-place switch; 1-3: a distance measuring device; 1-4: a frequency conversion device; 1-5: a PLC controller; 1-6: computer with a display
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
A fault monitoring and control arrangement for a bin discharge dedusting system in accordance with an embodiment of the first aspect of the invention is described below.
As shown in figures 1-4, the fault monitoring and control device of the ore tank unloading and dust removing system comprises a dust removing channel, a dust removing vehicle 0-2, a dust remover 0-3, a plurality of pressure sensors 1-1, a distance measuring device 1-3 and a control assembly.
The dust removal channel is arranged adjacent to the ore tank, a closed ventilation groove 0-1 is defined in the dust removal channel, the dust removal channel is provided with a dust removal track, for example, the dust removal track can be directly formed on the top wall of the dust removal channel and can also be formed on the side wall of the dust removal channel, the dust removal vehicle 0-2 is movably arranged on the dust removal track, the dust removal vehicle 0-2 is provided with a dust inlet for dust-containing air flow to enter and a dust outlet for dust-containing air flow to transfer, and the dust outlet of the dust removal vehicle 0-2 is communicated with the ventilation groove 0-1 in the process of moving along the dust removal track, so that the dust-containing air flow entering from the dust inlet of the dust removal vehicle 0-2 can flow into the ventilation groove 0-1 and then enter the next dust removal treatment.
Furthermore, a dust remover 0-3 is arranged at one end of the dust removing channel, the dust remover 0-3 is communicated with a ventilation groove 0-1 so as to remove dust from the dust-containing air flow entering the ventilation groove 0-1, a plurality of pressure sensors 1-1 are arranged at intervals along the extending direction of the ventilation groove 0-1, each pressure sensor 1-1 can detect the pressure at the position of the ventilation groove 0-1 where the dust removing vehicle is located, a distance measuring device 1-3 is arranged on the dust removing vehicle 0-2 and used for measuring the distance between the dust removing vehicle 0-2 and the dust remover 0-3, reference pressures under different working conditions are prestored in a control assembly, the control assembly is respectively connected with the pressure sensors 1-1, the distance measuring devices 1-3 and the dust remover 0-3 and receives detection pressures of the pressure sensors 1-1 and distance signals of the distance measuring devices 1-3, the detection pressures and the reference pressures under different working conditions, such as the working conditions without the dust removing vehicle 0-2 are compared, and the detection pressures at all positions in the ventilation groove 0-1 and the reference pressures at corresponding positions when the dust removing vehicle 0-2 is compared, or the detection pressures at all positions in the ventilation groove 0-1 and the reference pressures in the dust removing vehicle are compared with the reference pressures in the operation process when the dust removing vehicle 0-2.
Therefore, according to the fault monitoring and control device of the ore tank discharging and dust removing system, the pressure sensors 1-1 are arranged at intervals in the extending direction of the ventilation tank 0-1, the reference pressure at different positions in the ventilation tank 0-1 is preset in the control assembly, and the control assembly is connected with the pressure sensors 1-1 and the distance measuring device 1-3, so that fault monitoring is performed on the states in the ventilation tank 0-1 at different working conditions and different positions according to detected pressure, distance signals and the like.
In some embodiments of the present invention, as shown in FIG. 1, the reference pressure comprises a first reference pressure, which is a 0-2 movement of the non-dusting vehicleReference pressure of each position in the ventilation groove 0-1 under the operating condition, the first reference pressure is satisfied, and P = a 1 L 2 +a 2 L+a 3 Wherein a is 1 ＝-0.1～-0.08，a 2 ＝14.5～15.5，a 3 = -1000 to 0,P is the reference pressure of the pressure sensor 1-1 at any position in the ventilation groove 0-1, L is the distance between the pressure sensor 1-1 at any position and the dust remover 0-3, and a 1 、a 2 、a 3 The pressure values are obtained by calculating the detected pressure of any three pressure sensors 1-1 and the corresponding distance values L.
For example, confirm a 1 、a 2 、a 3 The working frequency of each gradient of the dust remover 0-3 can be fixed, then the corresponding values of the pressure and the distance of any three points are detected and substituted into the formula for calculation, and as shown in figure 2, when the dust remover 0-3 runs at the working frequency of 50Hz, the pressure and the distance of any three points are taken to calculate to obtain each coefficient a 1 、a 2 、a 3 Then forming an AB curve on an L-P coordinate system according to the obtained formula; when the dust remover 0-3 operates at the working frequency of 40Hz, the pressure and distance values of any three points are taken to calculate to obtain each coefficient a 1 、a 2 、a 3 Then forming a CD curve on an L-P coordinate system according to the obtained formula; when the dust remover 0-3 operates at the working frequency of 30Hz, the pressure and distance values of any three points are taken to calculate to obtain each coefficient a 1 、a 2 、a 3 And forming an EF curve on the L-P coordinate system according to the obtained formula.
Further, the working frequency of each gradient of the dust remover 0-3 and the corresponding pressure distance curve are prestored as first reference pressure, when the dust remover works in actual operation, under the working condition of the dust-free vehicle 0-2, the detection pressure of each position in the ventilation groove 0-1 is compared with the first reference pressure stored in the corresponding dust remover 0-3 under the working frequency, and whether a gas leakage fault occurs is further judged, as shown in fig. 3, the detection pressure of the GB1 section is obviously greater than the first reference pressure of the GB section, that is, when the system monitors that a certain point of the real-time pressure curve exceeds a reasonable fluctuation range (for example, 50 Pa) and is suddenly increased, the system prompts the G point to have the leakage fault and prompts maintenance.
In some examples of the invention, in order to avoid frequent comparison between the detection pressure and the reference pressure and cause false fault alarm, when the fluctuation of the detection pressure at any position in the ventilation slot 0-1 is less than 50Pa, namely the fluctuation of the detection pressure at any position in the ventilation slot 0-1 is less than 50Pa compared with the previous detection value, the control assembly determines that the pressure fluctuation belongs to reasonable fluctuation, and prompts the ore bin unloading and dust removing system to normally operate;
when the fluctuation of the detection pressure at any position in the ventilation groove 0-1 is larger than 50Pa, the detection pressure at the position is compared with the first reference pressure at the position, so that the logic comparison times of the control assembly are reduced, the loss is reduced, and the false alarm is reduced, and meanwhile, when the detection pressure at the position is larger than the first reference pressure at the position, the control assembly prompts that the position of the ventilation groove 0-1 has the air leakage fault.
In some embodiments of the present invention, the reference pressure includes a second reference pressure, the second reference pressure is a reference pressure at each position in the ventilation slot 0-1 under the operation condition of the dust removing vehicle 0-2, and the second reference pressure satisfies:
P1＝a 1 L 1 2 +a 2 L 1 +a 3 wherein a is 1 ＝-0.1～-0.08，a 2 ＝14.5～15.5，a 3 ＝-1000～0；
P2＝k 1 L 2 +b 1 Wherein k is 1 ＝-20～-15，b 1 ＝-45～-40；
P3＝k 2 L 3 +b 2 Wherein k is 2 ＝240～255，b 2 ＝-9200～-8900；
P4＝k 3 L4+b 3 Wherein k is 3 ＝0.95～1.15，b 3 ＝-400～-350；
Wherein P1 is the reference pressure in the groove section at one side of the ventilating groove 0-1 back to the dust removing vehicle 0-2, L1 is the distance between the pressure sensor 1-1 at any position in the groove section at one side of the ventilating groove 0-1 back to the dust removing vehicle 0-2 and the dust remover 0-3, a 1 、a 2 、a 3 Through ventilation slots 0-1The detected pressure of the pressure sensor 1-1 in the groove section at one side back to the dust removing vehicle 0-2 and the corresponding distance value are calculated, for example, the end of the ventilation groove 0-1 close to the dust remover 0-3 is a near end, the end of the ventilation groove 0-1 far from the dust remover 0-3 is a far end, P1 is the reference pressure from the near end of the ventilation groove 0-1 to the groove section between the dust removing vehicles 0-2, L1 is the distance from the pressure sensor 1-1 at any position from the far end of the ventilation groove 0-1 to the groove section between the dust removing vehicles 0-2 to the dust remover 0-3, a 1 、a 2 、a 3 The pressure is obtained by calculating the detection pressure of a pressure sensor 1-1 in the groove section between the far end of the ventilation groove 0-1 and the dust removing vehicle 0-2 and the corresponding distance value;
p2 and P3 are reference pressures in a groove section of the position of the ventilation groove 0-1 adjacent to the dust removing vehicle 0-2, L2 and L3 are distances between the pressure sensor 1-1 at any position in the groove section of the position of the ventilation groove 0-1 adjacent to the dust removing vehicle 0-2 and the dust remover 0-3, and k 1 、b 1 、k 2 、b 2 The pressure detection value is obtained by calculating the detection pressure of a pressure sensor 1-1 in a groove section of the position of the ventilation groove 0-1 adjacent to the dust removing vehicle 0-2 and the corresponding distance value;
p4 is the reference pressure in the section of the ventilation groove 0-1 between the dust removing vehicle 0-2 and the dust remover 0-3, L4 is the distance between the pressure sensor 1-1 at any position in the section of the ventilation groove 0-1 between the dust removing vehicle 0-2 and the dust remover 0-3, k 3 、b 3 The pressure value is obtained by calculating the detection pressure and the corresponding distance value of the pressure sensor 1-1 in the groove section of the ventilation groove 0-1 between the dust removing vehicle 0-2 and the dust remover 0-3, for example, the end of the ventilation groove 0-1 close to the dust remover 0-3 is a near end, the end of the ventilation groove 0-1 far from the dust remover 0-3 is a near end, P4 is the reference pressure in the groove section between the position of the dust removing vehicle 0-2 and the near end of the ventilation groove 0-1, L4 is the distance between the pressure sensor 1-1 at any position in the groove section between the position of the dust removing vehicle 0-2 and the near end of the ventilation groove 0-1 and the dust remover 0-3, k 3 、b 3 Through k 3 、b 3 The detection pressure of the pressure sensor 1-1 and the corresponding distance value are calculated and obtained through the detection pressure of the pressure sensor 1-1 in the groove section from the position of the dust removing vehicle 0-2 to the near end of the ventilating groove 0-1 and the corresponding distance value.
Specifically, for the 0-2 operation condition of the dust removing vehicle, a is confirmed 1 、a 2 、a 3 The working frequency of each gradient of the dust remover 0-3 can be fixed, then the corresponding values of the pressure and the distance of any three points of the groove section between the near end of the ventilating groove 0-1 and the dust removing vehicle 0-2 are detected and substituted into the formula for calculation, as shown in figure 4, when the dust remover 0-3 runs at the working frequency of 50Hz, the pressure and the distance value of any three points of the groove section between the near end of the ventilating groove 0-1 and the dust removing vehicle 0-2 are taken for calculation to obtain each coefficient a 1 、a 2 、a 3 Then forming an AM curve on an L-P coordinate system according to the obtained formula;
confirmation k 1 、b 1 、k 2 、b 2 In the process, the working frequency of each gradient of the fixed dust remover 0-3 (as shown in figure 4, the working frequency of the fixed dust remover 0-3 is 50 Hz), the position of the ventilation slot 0-1 where the dust removing vehicle 0-2 is located is determined according to the distance measuring device 1-3 of the dust removing vehicle 0-2, the approximate position of the ventilation slot 0-1 where the trend of the detected pressure at the adjacent position is increased after the detected pressure at the adjacent position is determined, the detected pressure and distance values at any two positions of the decreasing trend are obtained, the detected pressure and distance values at any two positions of the increasing trend are obtained, and the coefficient k is obtained through calculation 1 、b 1 、k 2 、b 2 Then forming an MQN curve on an L-P coordinate system according to the obtained formula; confirmation k 3 、b 3 When in use, the working frequency of the fixed dust remover 0-3 is 50Hz, and the coefficient k is calculated by detecting the detection pressure of any two-point pressure sensor 1-1 from the position of the dust removing vehicle 0-2 to the near-end groove section of the ventilating groove 0-1 and the corresponding distance value thereof 3 、b 3 And then forming an NB2 curve on the L-P coordinate system according to the obtained formula.
Further, the working frequency of each gradient of the dust remover 0-3 and the corresponding pressure distance curve chart are prestored as second reference pressure, and when the dust remover works in actual work, under the working condition of the dust removing vehicle 0-2, the detection pressure of each position in the ventilation groove 0-1 is compared with the second reference pressure stored in the corresponding working frequency of the dust remover 0-3, and then whether the air leakage fault occurs or not is judged.
In some examples of the invention, in order to avoid frequent comparison between the detected pressure and the reference pressure and cause fault false alarm, under the operation condition of the dust removing vehicle 0-2, when the fluctuation of the detected pressure at any position in the ventilation groove 0-1 is less than 50Pa, namely the fluctuation of the detected pressure at any position in the ventilation groove 0-1 is less than 50Pa compared with the previous detected value, the pressure fluctuation of the control assembly is determined to be reasonable fluctuation, and the normal operation of the ore bin unloading and dust removing system is prompted;
when the fluctuation of the detection pressure at any position in the ventilation groove 0-1 is larger than 50Pa, the detection pressure at the position is compared with the second reference pressure at the position, so that the logic comparison frequency of the control assembly is reduced, the loss is reduced, and the false alarm is reduced, and meanwhile, when the detection pressure at the position is larger than the second reference pressure at the position, the control assembly prompts that the position of the ventilation groove 0-1 has the air leakage fault.
As shown in fig. 4, in some examples, in order to distinguish a pressure distance curve of a detection pressure caused by air leakage from a pressure distance curve change of the dust removing vehicle 0-2 in the operation process under the operation condition of the dust removing vehicle 0-2, and reduce a false judgment rate, a reference pressure in a groove section of a position where the ventilation groove 0-1 is adjacent to the dust removing vehicle 0-2 is changed in a trend of decreasing first and then increasing. Preferably, the reference pressure variation tendency in the groove section where the ventilation groove 0-1 is adjacent to the dust removing vehicle 0-2 is substantially in the shape of a "√". Therefore, the pressure distance change characteristics of the positions of the ventilation slots 0-1 where the dust removing vehicles 0-2 are located in the pressure distance curve are identified, and the fault monitoring accuracy is improved.
In some embodiments of the invention, in order to realize intelligent real-time regulation and control of actual ventilation demand and avoid the situation that the dust remover 0-3 in the related technology runs at full load all the time to cause the situation that the ventilation groove 0-1 is close to one side of the near end of the dust remover 0-3 to form great ventilation waste, the fault monitoring and control device of the ore tank unloading and dust removing system further comprises a frequency conversion device 1-4, the frequency conversion device 1-4 is respectively connected with a control component and the dust remover 0-3, the control component receives signals sent by a pressure sensor 1-1, a distance measuring device 1-3 and the like, then judges whether the detection pressure at the ventilation groove 0-1 where the dust removing vehicle 0-2 is located reaches the minimum pressure required for effective dust removal according to the signals, and further dynamically controls the working frequency of the dust remover 0-3.
In some embodiments, the detected pressure in the section of the ventilation slot 0-1 adjacent to the location of the dust removing vehicle 0-2 is greater than the preset dust removing pressure P Preset of When the working frequency of the dust remover 0-3 is increased by the control component controlling the frequency conversion device 1-4, when the detection pressure in the groove section of the position of the ventilating groove 0-1 adjacent to the dust removing vehicle 0-2 is less than the preset dust removing pressure P Preset of When the dust remover works, the control component controls the frequency conversion device 1-4 to reduce the working frequency of the dust remover 0-3, wherein the dust removing pressure P is preset Preset of Satisfies the following conditions: -350 Pa.ltoreq.P Preset of Less than or equal to-650 Pa, and preset dust removal pressure P Preset of When the pressure is less than-350 Pa, the negative pressure suction in the section of the ventilating slot 0-1 where the dust removing vehicle 0-2 is positioned can not be ensured, and when the dust removing pressure P is preset Preset of When the pressure is higher than-650 Pa, the negative pressure suction force in the groove section where the dust removing vehicle 0-2 is positioned is far higher than the negative pressure suction force required by dust removal, and great ventilation waste is caused.
Preferably, the dust removal pressure P is preset Is preset equal to The pressure is-500 Pa, so that negative pressure suction required when the ventilation groove 0-1 at the dust removing vehicle 0-2 removes dust is ensured, and great ventilation waste can be avoided.
In some embodiments of the present invention, as shown in fig. 1, a discharging car is further included, the discharging car is located at the top of the mine pit and can move synchronously with the dust-removing cars 0-2, and the dust outlets of the discharging car are communicated with the dust inlets of the dust-removing cars 0-2, so that the dusty airflow absorbed by the discharging car enters the dust inlets of the dust-removing cars 0-2 through the dust outlets thereof and further enters the ventilating chutes 0-1.
Referring to fig. 1, in some alternative embodiments of the invention, the fault monitoring and controlling device of the ore bin discharging and dust removing system comprises a plurality of in-place switches 1-2, the in-place switches 1-2 are arranged at intervals along the extending direction of the ventilating duct 0-1, and the opening and closing states of the in-place switches 1-2 reflect the stage positions of the ventilating and dust removing vehicle 0-2 and are also used as a redundant configuration of infrared distance measuring sensors (namely distance measuring devices 1-3) on the ventilating and dust removing vehicle 0-2 so as to prevent the special condition that the infrared distance measuring sensors stop working under the extreme environment.
Preferably, the in-place switches 1-2 and the pressure sensors 1-1 are arranged in a one-to-one correspondence and uniformly manner, so that fault monitoring can still be performed through the cooperation of the in-place switches 1-2 and the pressure sensors 1-1 under the condition that the distance measuring device 1-3 is damaged.
Optionally, the control assembly includes a PLC controller 1-5 and a computer 1-6 connected to the PLC controller 1-5.
According to the ore tank discharging and dust removing system in the embodiment of the second aspect of the invention, the fault monitoring and control device of the ore tank discharging and dust removing system in the embodiment of the invention is adopted, and the system has the characteristics of simple structure, easiness in installation and use, reliable fault monitoring result, accurate positioning, high stability and the like.
According to the fault monitoring method of the ore tank discharging and dust removing system in the third aspect of the invention, the fault monitoring and controlling device of the ore tank discharging and dust removing system in the above embodiment of the invention is adopted, and the fault monitoring method comprises the following steps:
the method comprises the following steps that S1, reference pressures of different positions in a ventilation groove under different working conditions are prestored, wherein the reference pressures comprise a first reference pressure under the working condition of a non-dust-removing vehicle and a second reference pressure under the working condition of a dust-removing vehicle, namely the first reference pressure and the second reference pressure are prestored;
s2, detecting the detection pressure at different positions in the ventilation groove through a pressure sensor;
s3, comparing the detection pressure of the pressure sensor in the step S2 with the first reference pressure or the second reference pressure at the corresponding position according to different operation conditions;
and S4, when the detection pressure at any position in the ventilation groove in the step S2 is greater than the first reference pressure or the second reference pressure at the corresponding position under the corresponding working condition in the step S1, prompting that an air leakage fault occurs at the position in the ventilation groove, wherein the detection pressure at any position in the ventilation groove refers to the detection pressure at the position where the plurality of pressure sensors are located or the position close to the position.
Therefore, according to the fault monitoring method of the ore tank discharging and dust removing system, the reference pressures of different positions in the ventilation tank are prestored, the pressure detection is carried out on the different positions, and the detection pressures under different working conditions are compared with the reference pressures, so that the fault monitoring is carried out on the states in the ventilation tank under different working conditions and different positions.
In some embodiments of the present invention, as shown in fig. 1, the first reference pressure is a reference pressure at each position in the ventilation slot under the operation condition of the dust-free vehicle, and the first reference pressure satisfies that P = a 1 L 2 +a 2 L+a 3 Wherein a is 1 ＝-0.1～-0.08，a 2 ＝14.5～15.5，a 3 = -1000 to 0,P is the reference pressure of any position pressure sensor in the ventilation groove, L is the distance between the any position pressure sensor and the dust remover, and a 1 、a 2 、a 3 The pressure sensors are obtained by calculating the detection pressure of any three pressure sensors and the corresponding distance value L.
For example, confirm a 1 、a 2 、a 3 The working frequency of each gradient of the dust remover can be fixed, then the corresponding values of the pressure and the distance of any three points are detected and substituted into the formula for calculation, and as shown in figure 2, when the dust remover runs at the working frequency of 50Hz, the pressure and the distance value of any three points are taken for calculation to obtain each coefficient a 1 、a 2 、a 3 Then forming an AB curve on an L-P coordinate system according to the obtained formula; when the dust remover runs at 40Hz working frequency, the pressure and distance values of any three points are taken to calculate to obtain each coefficient a 1 、a 2 、a 3 Then forming a CD curve on an L-P coordinate system according to the obtained formula; when the dust remover runs at the working frequency of 30Hz, the pressure and distance values of any three points are taken to calculate to obtain each coefficient a 1 、a 2 、a 3 And forming an EF curve on the L-P coordinate system according to the obtained formula.
Further, the working frequency of each gradient of the dust remover and the corresponding pressure distance curve chart are prestored as first reference pressure, when the dust remover works and operates in actual work, under the working condition of a dust-free vehicle, the detection pressure of each position in the ventilation groove is compared with the first reference pressure of the operation storage under the corresponding working frequency of the dust remover, and whether a gas leakage fault occurs is further judged, for example, as shown in fig. 3, the detection pressure of a GB1 section is obviously greater than the first reference pressure of a GB section, namely when the system monitors that a certain point of the real-time pressure curve chart exceeds a reasonable fluctuation range (for example, +/-50 Pa) and is increased sharply, the system prompts a G point to have the gas leakage fault, and prompts maintenance.
In a further example of the present invention, in order to avoid frequent comparison between the detected pressure and the reference pressure and thereby causing a fault false alarm, the step S3 includes: s31, when the fluctuation of the detection pressure at any position in the ventilation groove is smaller than 50Pa, prompting the ore groove discharging and dust removing system to normally operate, namely, when the fluctuation of the detection pressure at any position in the ventilation groove is smaller than 50Pa, namely the fluctuation of the detection pressure at any position in the ventilation groove is smaller than 50Pa compared with the previous detection value, the control assembly determines that the fluctuation belongs to reasonable fluctuation, and prompting the ore groove discharging and dust removing system to normally operate.
In a further example of the present invention, the step S4 includes: and S41, when the fluctuation of the detection pressure at any position in the ventilation groove is greater than 50Pa, comparing the detection pressure at the position with the first reference pressure at the position prestored in the step S2, and when the detection pressure at the position is greater than the first reference pressure at the position, prompting the air leakage at the position of the ventilation groove, specifically, when the fluctuation of the detection pressure at any position in the ventilation groove is greater than 50Pa, comparing the detection pressure at the position with the first reference pressure at the position, so as to reduce the logic comparison times of the control assembly, reduce the loss and reduce false alarm, and simultaneously, when the detection pressure at the position is greater than the first reference pressure at the position, prompting the air leakage fault at the position of the ventilation groove by the control assembly at the moment.
In some embodiments of the present invention, the second reference pressure is a reference pressure at each position in the ventilation slot under the operation condition of the dust-removing vehicle, and the second reference pressure satisfies the following conditions:
P1＝a 1 L 1 2 +a 2 L 1 +a 3 wherein a is 1 ＝-0.1～-0.08，a 2 ＝14.5～15.5，a 3 ＝-1000～0；
P2＝k 1 L 2 +b 1 Wherein k is 1 ＝-20～-15，b 1 ＝-45～-40；
P3＝k 2 L 3 +b 2 Wherein k is 2 ＝240～255，b 2 ＝-9200～-8900；
P4＝k 3 L4+b 3 Wherein k is 3 ＝0.95～1.15，b 3 ＝-400～-350；
Wherein, P1 is the reference pressure in the groove section at one side of the ventilation groove back to the dust removing vehicle, L1 is the distance between the pressure sensor at any position in the groove section at one side of the ventilation groove back to the dust removing vehicle and the dust remover, a 1 、a 2 、a 3 The pressure value is obtained by calculating the detection pressure of a pressure sensor in the groove section at one side of the ventilation groove, which is back to the dust removal vehicle, and the corresponding distance value, for example, the end of the ventilation groove, which is close to the dust remover, is a near end, the end of the ventilation groove, which is far away from the dust remover, is a far end, P1 is the reference pressure of the groove section between the near end of the ventilation groove and the dust removal vehicle, L1 is the distance between the far end of the ventilation groove and the dust removal vehicle, and a is the distance between the pressure sensor at any position of the groove section between the far end of the ventilation groove and the dust removal vehicle 1 、a 2 、a 3 The pressure sensor is used for detecting the pressure of the pressure sensor in the groove section between the far end of the ventilation groove and the dust removing vehicle;
p2 and P3 are reference pressures in a groove section of the position of the ventilation groove adjacent to the dust removing vehicle, L2 and L3 are distances between a pressure sensor at any position in the groove section of the position of the ventilation groove adjacent to the dust removing vehicle and the dust remover, and k is the distance between the pressure sensor at any position and the dust remover 1 、b 1 、k 2 、b 2 The detection pressure and the corresponding distance value of the pressure sensor in the groove section of the position, adjacent to the dust removing vehicle, of the ventilating groove are calculated;
p4 is the reference pressure in the channel section of the ventilation channel between the dust-removing vehicle and the dust remover, L4 is the reference pressure between the dust-removing vehicle and the dust removerDistance k of pressure sensor at any position in the groove section of the ventilation groove from the dust collector 3 、b 3 The pressure value is calculated by the pressure sensor in the groove section of the ventilation groove between the dust removing vehicle and the dust remover and the corresponding distance value, for example, the end of the ventilation groove close to the dust remover is a near end, the end of the ventilation groove far away from the dust remover is a near end, P4 is the reference pressure in the groove section between the position of the dust removing vehicle and the near end of the ventilation groove, L4 is the distance between the pressure sensor in any position in the groove section between the position of the dust removing vehicle and the near end of the ventilation groove and the dust remover, k 3 、b 3 Through k 3 、b 3 The detection pressure of the pressure sensor and the corresponding distance value are calculated and obtained through the detection pressure of the pressure sensor in the groove section from the position of the dust removing vehicle to the near end of the ventilation groove and the corresponding distance value.
Specifically, for the operation condition of the dust removing vehicle, a is confirmed 1 、a 2 、a 3 The working frequency of each gradient of the dust remover can be fixed, then the corresponding values of the pressure and the distance of any three points of the groove section between the near end of the ventilating groove and the dust removing vehicle are detected and substituted into the formula for calculation, and as shown in figure 4, when the dust remover runs at the working frequency of 50Hz, the pressure and the distance of any three points of the groove section between the near end of the ventilating groove and the dust removing vehicle are taken to calculate each coefficient a 1 、a 2 、a 3 Then forming an AM curve on an L-P coordinate system according to the obtained formula;
confirmation k 1 、b 1 、k 2 、b 2 During the process, the working frequency of each gradient of the dust remover can be fixed (as shown in fig. 4, the working frequency of the fixed dust remover is 50 Hz), then the position of the ventilation groove where the dust remover is located is determined according to the distance measuring device of the dust remover, the approximate position of the ventilation groove where the trend that the detection pressure of the adjacent position is reduced firstly and then increased is determined, then the detection pressure and the distance value of any two positions of the reduced trend are taken, the detection pressure and the distance value of any two positions of the increased trend are taken, and the coefficient k is calculated to obtain 1 、b 1 、k 2 、b 2 Then on the L-P coordinate system according to the obtained formulaForming an MQN curve;
confirmation k 3 、b 3 When in use, the working frequency of the fixed dust remover is 50Hz, and the coefficient k is calculated by detecting the detection pressure of any two-point pressure sensor from the position of the dust removing vehicle to the near-end groove section of the ventilating groove and the corresponding distance value of the pressure sensor 3 、b 3 And then forming an NB2 curve on the L-P coordinate system according to the obtained formula.
And further, the working frequency of each gradient of the dust remover and a corresponding pressure distance curve chart are prestored and used as second reference pressure, and when the dust remover works and operates in actual work, under the working condition of a dust removing vehicle, the detection pressure of each position in the ventilation groove is compared with the second reference pressure stored in the ventilation groove under the corresponding working frequency of the dust remover, so that whether the air leakage fault occurs or not is judged.
In a further example of the present invention, in order to avoid frequent comparison between the detected pressure and the reference pressure, which may result in false alarm, the step S3 includes: s31, when the fluctuation of the detection pressure at any position in the ventilation groove is smaller than 50Pa, the normal operation of the ore groove discharging and dust removing system is prompted, namely, when the fluctuation of the detection pressure at any position in the ventilation groove is smaller than 50Pa, namely, the fluctuation of the detection pressure at any position in the ventilation groove is smaller than 50Pa compared with the previous detection value, the control assembly determines that the pressure fluctuation belongs to reasonable fluctuation, and the normal operation of the ore groove discharging and dust removing system is prompted.
In a further example of the present invention, said step S4 comprises: and S41, when the fluctuation of the detection pressure at any position in the ventilation groove is greater than 50Pa, comparing the detection pressure at the position with the second reference pressure prestored in the step S2, and when the detection pressure at the position is greater than the second reference pressure at the position, prompting the air leakage at the position of the ventilation groove, specifically, when the fluctuation of the detection pressure at any position in the ventilation groove is greater than 50Pa, comparing the detection pressure at the position with the second reference pressure at the position, so as to reduce the logic comparison times of the control assembly, reduce the loss and reduce false alarm, and meanwhile, when the detection pressure at the position is greater than the second reference pressure at the position, prompting the air leakage fault at the position of the ventilation groove by the control assembly at the moment.
The method for controlling the frequency conversion of the ore bin discharging and dust removing system according to the fourth aspect of the invention is described with reference to the attached figure 1.
According to the frequency conversion control method of the ore bin discharging and dust removing system provided by the embodiment of the invention, the fault monitoring and controlling device of the ore bin discharging and dust removing system provided by the embodiment of the first aspect of the invention is adopted, and the frequency conversion control method comprises the following steps:
s1, measuring the distance between a dust removing vehicle and a dust remover, determining the position of a ventilation groove where the dust removing vehicle is located, for example, measuring the position of the ventilation groove where the dust removing vehicle is located through a distance measuring device, and confirming the position through an in-place switch, so that the accuracy is improved;
s2, detecting the detection pressure at the position according to the position of the ventilation slot where the dust removing vehicle is located, which is determined in the step S1;
s3, comparing the detection pressure in the step S2 with a preset dust removal pressure P Preset of Comparing, wherein-350 Pa is less than or equal to P Preset of Less than or equal to-650 Pa, and preset dust removal pressure P Preset of When the pressure is less than-350 Pa, the negative pressure suction in the ventilating slot section where the dust removing vehicle is positioned can not be ensured, and when the dust removing pressure P is preset Preset of When the pressure is higher than-650 Pa, the negative pressure suction force in the groove section where the dust removing vehicle is positioned is far higher than the negative pressure suction force required by dust removal, and great ventilation waste is caused;
s4, when the detection pressure is less than the preset dust removal pressure P Preset When the detected pressure is higher than the preset dust-removing pressure P, the power of the dust remover is reduced Preset of And increasing the power of the dust remover.
Therefore, according to the frequency conversion control method of the ore tank unloading and dust removing system provided by the embodiment of the invention, the detection pressure at the position of the ventilation tank where the dust removing vehicle is located is detected and is matched with the preset dust removing pressure P Preset of Compared with the prior art, the negative pressure suction in the ventilating slot section where the dust removing vehicle is located can be ensured, the situation that the negative pressure suction in the slot section where the dust removing vehicle is located is far larger than the negative pressure suction required by dust removal, so that great ventilation waste is caused can be avoided, and the dust remover can be operated in the running process of the dust removing vehicleThe frequency is dynamically adjusted, so that the purposes of saving energy, reducing consumption and prolonging the service life of components are achieved.
In some embodiments of the present invention, to further avoid waste of ventilation and ensure negative suction, the dust removal pressure P is preset Preset of Satisfies the following conditions: -450 Pa.ltoreq.P Preset of ≤-550Pa。
In some embodiments of the present invention, before step S1, the following steps are further included: s11, whether the ventilation groove leaks air or not is detected, and when the ventilation groove is detected to leak air from any position, the ventilation groove is prompted to have a leakage fault at the position in the ventilation groove.
Therefore, under the operating condition of the dust removing vehicle, air leakage fault detection is performed firstly, and then frequency conversion regulation and control are performed, so that the phenomenon that the air leakage condition is increased due to the fact that the working frequency of the dust remover is increased under the air leakage fault is avoided.
In a further embodiment of the invention, step S11 comprises the steps of:
s111, prestoring reference pressures of different positions in the ventilation groove under different working conditions, wherein the reference pressures comprise a first reference pressure under the working condition of no dust removing vehicle operation and a second reference pressure under the working condition of dust removing vehicle operation, namely prestoring the first reference pressure and the second reference pressure;
s112, detecting the detection pressure at different positions in the ventilation groove through a pressure sensor;
s113, comparing the detection pressure of the pressure sensor in the step S112 with the first reference pressure or the second reference pressure at the corresponding position according to different operation conditions;
and S114, when the detection pressure at any position in the ventilation groove in the step S112 is greater than the first reference pressure or the second reference pressure at the corresponding position in the corresponding working condition in the step S111, prompting that an air leakage fault occurs at the position in the ventilation groove, namely, under the working condition that the dust removing vehicle runs, comparing the detection pressure in the ventilation groove in the step S112 with the second reference pressure at the corresponding position in the step S111, and when the detection pressure is steeply increased compared with the second reference pressure, prompting that the air leakage fault occurs at the position.
In some embodiments of the invention, the first reference pressure is a reference pressure at each position in the ventilation groove under the operation condition of the dust-free vehicle, the first reference pressure satisfies that P = a 1 L 2 +a 2 L+a 3 Wherein a is 1 ＝-0.1～-0.08，a 2 ＝14.5～15.5，a 3 = -1000 to 0,P is the reference pressure of any position pressure sensor in the ventilation groove, L is the distance between the any position pressure sensor and the dust remover, and a 1 、a 2 、a 3 The pressure sensors are obtained by calculating the detection pressure of any three pressure sensors and the corresponding distance value L.
For example, confirm a 1 、a 2 、a 3 The working frequency of each gradient of the dust remover can be fixed, then the corresponding values of the pressure and the distance of any three points are detected and substituted into the formula for calculation, and as shown in figure 2, when the dust remover runs at the working frequency of 50Hz, the pressure and the distance value of any three points are taken for calculation to obtain each coefficient a 1 、a 2 、a 3 Then forming an AB curve on an L-P coordinate system according to the obtained formula; when the dust remover runs at 40Hz working frequency, the pressure and distance values of any three points are taken to calculate to obtain each coefficient a 1 、a 2 、a 3 Then forming a CD curve on an L-P coordinate system according to the obtained formula; when the dust remover runs at the working frequency of 30Hz, the pressure and distance values of any three points are taken to calculate to obtain each coefficient a 1 、a 2 、a 3 And forming an EF curve on the L-P coordinate system according to the obtained formula.
Further, the working frequency of each gradient of the dust remover and the corresponding pressure distance curve chart are prestored as first reference pressure, when the dust remover works and operates in actual work, under the working condition of a dust-free vehicle, the detection pressure of each position in the ventilation groove is compared with the first reference pressure of the operation storage under the corresponding working frequency of the dust remover, and whether a gas leakage fault occurs is further judged, for example, as shown in fig. 3, the detection pressure of a GB1 section is obviously greater than the first reference pressure of a GB section, namely when the system monitors that a certain point of the real-time pressure curve chart exceeds a reasonable fluctuation range (for example, +/-50 Pa) and is increased sharply, the system prompts a G point to have the gas leakage fault, and prompts maintenance.
In a further example of the present invention, in order to avoid frequent comparison between the detected pressure and the reference pressure, which may result in false alarm, the step S113 includes: when the fluctuation of the detection pressure at any position in the ventilation groove is less than 50Pa, the normal operation of the ore groove discharging and dust removing system is prompted, namely, when the fluctuation of the detection pressure at any position in the ventilation groove is less than 50Pa, namely, the fluctuation of the detection pressure at any position in the ventilation groove is less than 50Pa compared with the previous detection value, the control assembly determines that the fluctuation belongs to reasonable fluctuation, and the normal operation of the ore groove discharging and dust removing system is prompted;
when the fluctuation of the detection pressure at any position in the ventilation groove is greater than 50Pa, comparing the detection pressure at the position with the first reference pressure at the position prestored in the step S112, and when the detection pressure at the position is greater than the first reference pressure at the position, prompting the air leakage at the position of the ventilation groove.
In some embodiments of the present invention, the second reference pressure is a reference pressure at each position in the ventilation slot under the operation condition of the dust-removing vehicle, and the second reference pressure satisfies the following conditions:
P1＝a 1 L 1 2 +a 2 L 1 +a 3 wherein a is 1 ＝-0.1～-0.08，a 2 ＝14.5～15.5，a 3 ＝-1000～0；
P2＝k 1 L 2 +b 1 Wherein k is 1 ＝-20～-15，b 1 ＝-45～-40；
P3＝k 2 L 3 +b 2 Wherein k is 2 ＝240～255，b 2 ＝-9200～-8900；
P4＝k 3 L4+b 3 Wherein k is 3 ＝0.95～1.15，b 3 ＝-400～-350；
Wherein, P1 is the reference pressure in the groove section of one side of the ventilation groove back to the dust removing vehicle, L1 is the distance between the pressure sensor at any position in the groove section of one side of the ventilation groove back to the dust removing vehicle and the dust remover, a 1 、a 2 、a 3 The pressure value is obtained by calculating the detection pressure of a pressure sensor in the groove section at one side of the ventilation groove, which is back to the dust removal vehicle, and the corresponding distance value, for example, the end of the ventilation groove, which is close to the dust remover, is a near end, the end of the ventilation groove, which is far away from the dust remover, is a far end, P1 is the reference pressure of the groove section between the near end of the ventilation groove and the dust removal vehicle, L1 is the distance between the far end of the ventilation groove and the dust removal vehicle, and a is the distance between the pressure sensor at any position of the groove section between the far end of the ventilation groove and the dust removal vehicle 1 、a 2 、a 3 The pressure sensor is used for detecting the pressure of the pressure sensor in the groove section between the far end of the ventilation groove and the dust removing vehicle;
p2 and P3 are reference pressures in a groove section of the position of the ventilation groove adjacent to the dust removing vehicle, L2 and L3 are distances between a pressure sensor at any position in the groove section of the position of the ventilation groove adjacent to the dust removing vehicle and the dust remover, and k is the distance between the pressure sensor at any position and the dust remover 1 、b 1 、k 2 、b 2 The detection pressure and the corresponding distance value of the pressure sensor in the groove section of the position, adjacent to the dust removing vehicle, of the ventilation groove are calculated;
p4 is the reference pressure in the groove section of the ventilation groove between the dust removing vehicle and the dust remover, L4 is the distance between the pressure sensor at any position in the groove section of the ventilation groove between the dust removing vehicle and the dust remover, and k is the distance between the pressure sensor at any position and the dust remover 3 、b 3 The pressure detected by a pressure sensor in the groove section of the ventilation groove between the dust removing vehicle and the dust remover and the corresponding distance value are calculated, for example, the end of the ventilation groove close to the dust remover is a near end, the end of the ventilation groove far away from the dust remover is a near end, P4 is the reference pressure in the groove section between the position of the dust removing vehicle and the near end of the ventilation groove,l4 is the distance k from the dust remover to any position pressure sensor in the groove section between the position of the dust removing vehicle and the near end of the ventilation groove 3 、b 3 Through k 3 、b 3 And calculating the detection pressure of the pressure sensor and the corresponding distance value thereof according to the detection pressure of the pressure sensor in the groove section from the position of the dust removing vehicle to the near end of the ventilation groove and the corresponding distance value thereof.
Specifically, for the operation condition of the dust removing vehicle, a is confirmed 1 、a 2 、a 3 The working frequency of each gradient of the dust remover can be fixed, then the corresponding values of the pressure and the distance of any three points of the groove section between the near end of the ventilating groove and the dust removing vehicle are detected and substituted into the formula for calculation, and as shown in figure 4, when the dust remover runs at the working frequency of 50Hz, the pressure and the distance of any three points of the groove section between the near end of the ventilating groove and the dust removing vehicle are taken to calculate each coefficient a 1 、a 2 、a 3 Then forming an AM curve on an L-P coordinate system according to the obtained formula;
confirmation k 1 、b 1 、k 2 、b 2 During the process, the working frequency of each gradient of the dust remover can be fixed (as shown in fig. 4, the working frequency of the fixed dust remover is 50 Hz), then the position of the ventilation groove where the dust remover is located is determined according to the distance measuring device of the dust remover, the approximate position of the ventilation groove where the trend that the detection pressure of the adjacent position is reduced firstly and then increased is determined, then the detection pressure and the distance value of any two positions of the reduced trend are taken, the detection pressure and the distance value of any two positions of the increased trend are taken, and the coefficient k is calculated to obtain 1 、b 1 、k 2 、b 2 Then forming an MQN curve on an L-P coordinate system according to the obtained formula;
confirmation k 3 、b 3 When in use, the working frequency of the fixed dust remover is 50Hz, and the coefficient k is calculated by detecting the detection pressure of any two-point pressure sensor from the position of the dust removing vehicle to the near-end groove section of the ventilating groove and the corresponding distance value of the pressure sensor 3 、b 3 And then forming an NB2 curve on the L-P coordinate system according to the obtained formula.
And further, the working frequency of each gradient of the dust remover and the corresponding pressure distance curve chart are prestored and used as second reference pressure, and when the dust remover works and operates in actual work, under the working condition of a dust removing vehicle, the detection pressure of each position in the ventilation groove is compared with the second reference pressure of the dust remover under the corresponding working frequency, so that whether the air leakage fault occurs or not is judged.
In a further example of the present invention, in order to avoid frequent comparison between the detected pressure and the reference pressure and thereby causing a fault false alarm, the step S113 includes: when the fluctuation of the detection pressure at any position in the ventilation groove is smaller than 50Pa, the normal operation of the ore groove discharging and dust removing system is prompted, namely, when the fluctuation of the detection pressure at any position in the ventilation groove is smaller than 50Pa, namely, the fluctuation of the detection pressure at any position in the ventilation groove is smaller than 50Pa compared with the previous detection value, the control assembly determines that the fluctuation belongs to reasonable fluctuation, and the normal operation of the ore groove discharging and dust removing system is prompted.
When the fluctuation of the detection pressure at any position in the ventilation groove is greater than 50Pa, comparing the detection pressure at the position with the second reference pressure at the position prestored in the step S112, and when the detection pressure at the position is greater than the second reference pressure at the position, prompting the air leakage at the position of the ventilation groove. In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.
In the description of the present invention, "a plurality" means two or more.
In the description of the invention, "on" or "under" a first feature may include that the first and second features are in direct contact, and may also include that the first and second features are not in direct contact but are in contact via another feature between them.
In the description of the invention, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
Other configurations and operations of the fault monitoring and control device of the ore bin discharging and dust removing system, the ore bin discharging and dust removing system and the fault monitoring method of the ore bin discharging and dust removing system according to the embodiments of the present invention are known to those skilled in the art, and will not be described in detail herein.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (21)

1. The utility model provides a trouble monitoring and controlling means of ore deposit groove dust pelletizing system of unloading which characterized in that includes:
the dust removal channel is arranged close to the ore tank and limits a closed ventilation groove, and the dust removal channel is provided with a dust removal track;
the dust removing vehicle is movably arranged on the dust removing track and is provided with a dust inlet and a dust outlet, and the dust outlet can be communicated with the ventilation groove in the moving process;
the dust remover is arranged at one end of the dust removing channel and is communicated with the ventilation groove so as to remove dust in the ventilation groove;
the pressure sensors are arranged at intervals along the extending direction of the ventilation groove, and each pressure sensor can detect the pressure at the position of the ventilation groove;
the distance measuring device is arranged on the dust removing vehicle to measure the distance between the dust removing vehicle and the dust remover;
and the control assembly is internally pre-stored with reference pressure, is respectively connected with the pressure sensors, the distance measuring device and the dust remover and compares the detection pressure of the pressure sensors, the distance signal of the distance measuring device and the reference pressure to monitor faults.
2. The fault monitoring and control device of the ore bin unloading and dust removing system according to claim 1, wherein the reference pressure comprises a first reference pressure, and under the operation condition of the non-dust removing vehicle, the first reference pressure satisfies: p = a1L2+ a2L + a3, wherein a1= -0.1-0.08, a2= 14.5-15.5, and a3= -1000-0,P is a reference pressure of a pressure sensor at any position in the ventilation groove, L is a distance between the pressure sensor at any position and the dust remover, and a1, a2 and a3 are obtained by calculating detection pressures of any three pressure sensors and corresponding distance values L of the pressure sensors.
3. The fault monitoring and control device of the ore tank discharging and dust removing system according to claim 2,
when the fluctuation of the detection pressure at any position in the ventilation groove is smaller than 50Pa, the control assembly prompts the ore groove unloading and dust removing system to normally operate;
when the fluctuation of the detection pressure at any position in the ventilation groove is larger than 50Pa, the detection pressure at the position is compared with the first reference pressure at the position, and when the detection pressure at the position is larger than the first reference pressure at the position, the control component prompts the position of the ventilation groove to leak air.
4. The fault monitoring and control device of the ore bin discharging and dedusting system of claim 1, wherein the reference pressure comprises a second reference pressure, and under the operation condition of the dedusting vehicle, the second reference pressure satisfies:
p1= a1L12+ a2L1+ a3, wherein a1= -0.1 to-0.08, a2=14.5 to 15.5, and a3= -1000 to 0;
p2= k1L2+ b1, wherein k1= -20 to-15, b1= -45 to-40;
p3= k2L3+ b2, wherein k2= 240-255, b2= -9200 ~ -8900;
p4= k3L4+ b3, wherein k3= 0.95-1.15, b3= -400 = -350;
wherein P1 is the reference pressure in the groove section of one side of the ventilation groove, which is back to the dust removal vehicle, L1 is the distance between the pressure sensor at any position in the groove section of one side of the ventilation groove, which is back to the dust removal vehicle, and the dust remover, and a1, a2 and a3 are obtained by calculating the detection pressure of the pressure sensor in the groove section of one side of the ventilation groove, which is back to the dust removal vehicle, and the corresponding distance value,
p2 and P3 are reference pressures in a groove section of the position where the ventilating groove is adjacent to the dust removing vehicle, L2 and L3 are distances between a pressure sensor at any position in the groove section of the position where the ventilating groove is adjacent to the dust removing vehicle and the dust remover, k1, b1, k2 and b2 are obtained by calculating the detection pressure of the pressure sensor in the groove section of the position where the ventilating groove is adjacent to the dust removing vehicle and the corresponding distance value of the pressure sensor,
p4 is the reference pressure in the groove section of the ventilation groove between the dust removing vehicle and the dust remover, L4 is the distance between the pressure sensor at any position in the groove section of the ventilation groove between the dust removing vehicle and the dust remover, and k3 and b3 are obtained by calculating the detection pressure of the pressure sensor in the groove section of the ventilation groove between the dust removing vehicle and the dust remover and the corresponding distance value.
5. The fault monitoring and control device of the ore tank discharging and dust removing system according to claim 4,
when the fluctuation of the detection pressure at any position in the ventilation groove is less than 50Pa, the control assembly prompts the normal operation of the ore groove discharging and dust removing system;
when the fluctuation of the detection pressure of any position in the groove section of one side of the ventilation groove, which is back to the dust removal vehicle, is greater than 50Pa, comparing the detection pressure of the position with the second reference pressure of the position, and when the detection pressure of the position is greater than the second reference pressure of the position, prompting the position of the ventilation groove to leak air by the control assembly;
when the fluctuation of the detection pressure at any position in the groove section of the ventilation groove between the dust removing vehicle and the dust remover is larger than 50Pa, the detection pressure at the position is compared with the second reference pressure at the position, and when the detection pressure at the position is larger than the second reference pressure at the position, the control component prompts the air leakage at the position of the ventilation groove.
6. The fault monitoring and control device of the ore bin discharge and dust removal system according to claim 4, wherein the reference pressure in the section of the ventilation bin adjacent to the location of the dust removal vehicle is in a trend of decreasing first and then increasing.
7. The fault monitoring and control device of a mine chute unloading and dedusting system as in claim 6, wherein the trend of the reference pressure within the section of the vent chute adjacent to the location of the dedusting vehicle is substantially in the shape of a "V".
8. The fault monitoring and control device of the ore bin discharging and dedusting system of claim 4, further comprising a frequency conversion device, wherein the frequency conversion device is respectively connected with the control component and the deduster so as to dynamically control the working frequency of the deduster according to the control signal of the control component.
9. The fault monitoring and control device of the ore tank discharging and dust removing system according to claim 8,
when the detection pressure in the groove section of the ventilation groove adjacent to the position of the dust removing vehicle is greater than the preset dust removing pressure Ppreset, the control assembly controls the frequency conversion device to increase the working frequency of the dust remover;
when the detection pressure in the groove section of the ventilation groove adjacent to the position of the dust removing vehicle is smaller than the preset dust removing pressure P, the control component controls the frequency conversion device to reduce the working frequency of the dust remover,
wherein the preset dust removal pressure P is preset to satisfy: p is more than or equal to 350Pa and is less than or equal to 650Pa.
10. The fault monitoring and control device of the ore tank discharging and dust removing system according to claim 9,
the preset dust removal pressure P is preset to be 500Pa.
11. The fault monitoring and control device of the ore bin discharging and dust removing system according to claim 1,
the mine groove dust removal device is characterized by further comprising a discharging car, wherein the discharging car is movably arranged at the top of the mine groove, a dust outlet of the discharging car is communicated with the dust inlet of the dust removal car through a pipeline, and the dust removal car moves synchronously along with the discharging car.
12. The fault monitoring and control device of the ore tank discharging and dust removing system according to claim 1,
the air vent structure further comprises a plurality of in-place switches which are arranged at intervals along the extending direction of the air vent groove.
13. The fault monitoring and control device of the ore bin discharging and dedusting system of claim 12, wherein a plurality of the in-place switches and a plurality of the pressure sensors are arranged in a one-to-one correspondence and uniformly.
14. The utility model provides a dust pelletizing system is unloaded to ore deposit groove which characterized in that includes: a fault monitoring and control device for a sluice unloading and dust removal system according to any one of claims 1 to 13.
15. A fault monitoring method of a mine pit unloading and dust removing system, which adopts the fault monitoring and controlling device of the mine pit unloading and dust removing system according to any one of claims 1-13, characterized in that the fault monitoring method comprises the following steps:
step S1, pre-storing reference pressures at different positions in a ventilation groove, wherein the reference pressures comprise a first reference pressure under the operating condition of a non-dust-removing vehicle and a second reference pressure under the operating condition of a dust-removing vehicle;
s2, detecting the detection pressure of the position where the pressure sensor is located by the plurality of pressure sensors respectively;
s3, comparing the detection pressure of the step S2 with the reference pressure at the corresponding position prestored in the step S1;
and S4, when the detected pressure at any position in the ventilation groove in the step S2 is greater than the reference pressure at the corresponding position in the ventilation groove pre-stored in the step S1, prompting that the air leakage fault occurs at the position in the ventilation groove.
16. The fault monitoring method of the ore bin discharge and dust removal system according to claim 15, wherein the first reference pressure satisfies: p = a1L2+ a2L + a3, wherein a1= -0.1-0.08, a2= 14.5-15.5, and a3= -1000-0,P is a reference pressure of the pressure sensor at any position in the ventilation groove, L is a distance between the pressure sensor at any position and a dust remover, and a1, a2 and a3 are obtained by calculating detection pressures of any three pressure sensors and corresponding distance values L thereof.
17. The fault monitoring method of the ore bin discharge dedusting system of claim 16, wherein the step S3 comprises:
s31, when the fluctuation of the detection pressure at any position in the ventilation groove is smaller than 50Pa, prompting the normal operation of the ore groove discharging and dedusting system.
18. The fault monitoring method of the ore bin discharge dust removal system according to claim 17, wherein the step S4 comprises:
s41, when the fluctuation of the detection pressure at any position in the ventilation groove is larger than 50Pa, comparing the detection pressure at the position with the first reference pressure prestored at the position in the step S2, and when the detection pressure at the position is larger than the first reference pressure at the position, prompting air leakage at the position of the ventilation groove.
19. The fault monitoring method of the ore bin discharge dust removal system according to claim 15, wherein the second reference pressure satisfies:
p1= a1L12+ a2L1+ a3, wherein a1= -0.1 to-0.08, a2=14.5 to 15.5, and a3= -1000 to 0;
p2= k1L2+ b1, wherein k1= -20 to-15, b1= -45 to-40;
p3= k2L3+ b2, wherein k2= 240-255, b2= -9200 ~ -8900;
p4= k3L4+ b3, wherein k3= 0.95-1.15, b3= -400 = -350;
wherein P1 is the reference pressure in the groove section of one side of the ventilation groove, which is back to the dedusting vehicle, L1 is the distance between the pressure sensor at any position in the groove section of one side of the ventilation groove, which is back to the dedusting vehicle, and the deduster, and a1, a2 and a3 are obtained by calculating the detection pressure of the pressure sensor in the groove section of one side of the ventilation groove, which is back to the dedusting vehicle, and the corresponding distance value,
p2 and P3 are reference pressures in a groove section of the position of the ventilating groove adjacent to the dust removing vehicle, L2 and L3 are distances between the pressure sensor and the dust remover at any position in the groove section of the position of the ventilating groove adjacent to the dust removing vehicle, k1, b1, k2 and b2 are obtained by calculating the detection pressure of the pressure sensor in the groove section of the position of the ventilating groove adjacent to the dust removing vehicle and the corresponding distance value of the pressure sensor,
p4 is the reference pressure in the groove section of the ventilation groove between the dust removing vehicle and the dust remover, L4 is the distance between the pressure sensor and the dust remover at any position in the groove section of the ventilation groove between the dust removing vehicle and the dust remover, and k3 and b3 are obtained by calculating the detection pressure of the pressure sensor in the groove section of the ventilation groove between the dust removing vehicle and the dust remover and the corresponding distance value.
20. The fault monitoring method of the ore bin discharge dedusting system of claim 19, wherein the step S3 comprises:
s31, when the fluctuation of the detection pressure at any position in the ventilation groove is smaller than 50Pa, prompting the normal operation of the ore groove discharging and dedusting system.
21. The fault monitoring method of the ore bin discharge dedusting system of claim 20, wherein the step S4 comprises:
s41, when the fluctuation of the detection pressure at any position in the ventilation groove is larger than 50Pa, comparing the detection pressure at the position with the second reference pressure prestored at the position in the step S2, and when the detection pressure at the position is larger than the second reference pressure at the position, prompting the air leakage at the position of the ventilation groove.
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