CN115318022A - Harmful gas monitoring and early warning system for mine - Google Patents
Harmful gas monitoring and early warning system for mine Download PDFInfo
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- CN115318022A CN115318022A CN202210548018.XA CN202210548018A CN115318022A CN 115318022 A CN115318022 A CN 115318022A CN 202210548018 A CN202210548018 A CN 202210548018A CN 115318022 A CN115318022 A CN 115318022A
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- cavity
- circular ring
- mine
- air
- elastic cloth
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/74—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element
- B01D46/76—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element involving vibrations
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
The invention belongs to the technical field of mine monitoring, and particularly relates to a harmful gas monitoring and early warning system for a mine, which comprises a gas detector, wherein the gas detector comprises a detector, a wire inlet hole, an alarm, a sensor and a gas cabin; through setting up the ring, spring and elasticity cloth, the controller is controlling the air pump and is stopping, the appeal disappears and elasticity cloth can drive the ring downstream rapidly, make the ring drive the spring and collide with cavity bottom inner wall mutually, make the spring drive the ring vibration from top to bottom in the cavity, and then lead to filter screen bottom dust to drop under the effect of vibration, reduce a large amount of dusts in filter screen bottom accumulation, lead to the filter screen on the surface filtration pore block, the phenomenon that causes the air mass flow in the air pump suction sensor to reduce appears, and then influence the accuracy that gas sensitive element detected the air composition.
Description
Technical Field
The invention belongs to the technical field of mine monitoring, and particularly relates to a harmful gas monitoring and early warning system for a mine.
Background
In recent years, frequent mine accidents are surprised by people, so that mine safety becomes a focus of attention of governments and common people, harmful gas accidents such as gas account for more than 80% seen from statistics of accident reasons, and water permeation accidents are adopted, so that how to monitor mine air by using modern high-tech means to protect the safety of miners and national property becomes an important topic for safety expert research; the surface air enters the well from the shaft to form the air of the well, and a series of changes occur, mainly including: the oxygen content is reduced, the content of toxic and harmful gases is increased, the dust concentration is increased, and the physical state changes of the air such as temperature, humidity, pressure and the like are reduced;
the gas detector is one of the devices for monitoring the air composition of the mine, is an instrument for detecting the gas concentration, is suitable for dangerous places with combustible or toxic gas, and can continuously detect the content of the toxic gas or combustible gas in the air for a long time; the gas detector has two types of dispersion and pump suction, and the dispersion and pump suction mainly differ in that the main components of the two are different by one gas sampling pump, a gas sensitive element for detecting gas components is arranged in the sensor, the dispersion type gas is naturally diffused to the instrument sensor for detection, the pump suction actively sucks gas and transports the gas to the sensor for detection, and the pump suction has the advantages of short response time, long detection distance and the like compared with the dispersion type gas detector;
because there is a large amount of dust in the pit, so be provided with the filter screen bottom the pump suction type gas detector, reduce the dust in the pit through the filter screen and get into in the detector, lead to the phenomenon of spare part harm to appear in the detector, but when the pump suction type gas detector is using for a long time after, probably a large amount of dust accumulation in the filter screen bottom, lead to the filter hole on the filter screen surface to block up, thereby cause the phenomenon that the air mass flow that the air pump suction was into in the sensor reduces to appear, and then influence the accuracy that gas sensing element detected air composition.
Based on the technical scheme, the invention designs a harmful gas monitoring and early warning system for a mine, so as to solve the technical problems.
Disclosure of Invention
The invention provides a harmful gas monitoring and early warning system for a mine, aiming at overcoming the defects that after an existing pump-suction type gas detector is used for a long time, a large amount of dust possibly accumulates at the bottom of a filter screen, filter holes on the surface of the filter screen are blocked, the air flow rate of air pumped into a sensor by an air pump is reduced, and the accuracy of a gas sensitive element for detecting air components is influenced.
The technical scheme adopted by the invention for solving the technical problem is as follows: the invention relates to a harmful gas monitoring and early warning system for a mine, which comprises a gas detector, wherein the gas detector comprises a detector, a wire inlet hole, an alarm, a sensor and a gas cabin, the wire inlet hole is fixedly connected to the side edge of the detector, the alarm is fixedly connected to the side of the detector far away from the wire inlet hole, the sensor is fixedly connected to the bottom of the detector, the gas cabin is arranged at the bottom of the sensor, and the gas cabin comprises:
the shell is in threaded connection with the bottom of the sensor, and a cavity is formed in the shell;
the outer side of the circular ring is connected with the inner wall of the cavity in a sliding manner, and the inner side of the circular ring is fixedly connected with a filter screen;
the end part of the elastic cloth is fixedly connected with the bottom of the circular ring, and the other end part of the elastic cloth is fixedly connected with the inner wall of the bottom of the cavity;
the spring is positioned on the outer side of the elastic cloth and fixedly connected with the bottom of the circular ring;
and the controller controls the operation of the internal parts of the gas detector.
Preferably, the inner wall of the cavity is fixedly connected with a clamping block, and the clamping block is positioned on the upper portion of the circular ring.
Preferably, the sectional shape of the latch is a semicircle.
Preferably, the outer side of the circular ring is fixedly connected with a rubber ring.
Preferably, the upper surface of the circular ring is provided with a spongy cushion, and the bottom of the spongy cushion is connected with the upper surface of the circular ring through a magnet.
Preferably, the surface of the spongy cushion is provided with vent holes, and the vent holes are positioned above the filter screen.
Preferably, the vent hole is shaped as a bell mouth.
Preferably, the elastic cloth is made of an oxford cloth material.
Preferably, the end part of the elastic cloth is connected with the inner wall of the bottom of the cavity through a magic tape.
Preferably, the surface of the elastic cloth is fixedly connected with a bump.
The invention has the following beneficial effects:
1. according to the harmful gas monitoring and early warning system for the mine, the ring, the spring and the elastic cloth are arranged, the controller controls the air pump to stop, the attractive force disappears, the elastic cloth can rapidly drive the ring to move downwards, the ring drives the spring to collide with the inner wall of the bottom of the cavity, the spring drives the ring to vibrate up and down in the cavity, dust at the bottom of the filter screen falls off under the vibration effect, the phenomenon that a large amount of dust is accumulated at the bottom of the filter screen, filter holes in the surface of the filter screen are blocked, the air flow sucked into the sensor by the air pump is reduced, and the accuracy of detecting air components by the air-sensitive element is further influenced.
2. According to the harmful gas monitoring and early warning system for the mine, the clamping blocks are arranged, the plurality of layers of clamping blocks are uniformly arranged on the inner wall of the cavity, the clamping blocks and the inner wall of the cavity form an uneven path, when the suction force disappears due to the stop of the air pump, the elastic cloth can rapidly drive the circular ring to move downwards, and the outer side of the circular ring is in indirect contact with the clamping blocks when passing through the uneven path, so that the circular ring is integrally vibrated, dust accumulated at the bottom of the filter screen is accelerated to shake off, and the working efficiency of dredging filter holes of the filter screen is improved.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a perspective view of a gas detector of the harmful gas monitoring and early warning system for mines in the invention;
FIG. 2 is a cross-sectional view of the gas chamber of the gas sensor of FIG. 1;
FIG. 3 is an enlarged view of the structure at A in FIG. 2;
FIG. 4 is a schematic view of the sponge pad of FIG. 2;
FIG. 5 is an enlarged view of the structure at B in FIG. 4;
in the figure: 1. a detector; 2. a wire inlet hole; 3. an alarm; 4. a sensor; 5. a housing; 51. a cavity; 511. a clamping block; 52. a circular ring; 521. a filter screen; 522. a rubber ring; 523. a sponge cushion; 524. a vent hole; 53. elastic cloth; 531. a bump; 54. a spring.
Detailed Description
In order to make the objects, technical means and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
The embodiment of the invention provides a harmful gas monitoring and early warning system for a mine, and solves the problems that after an existing pump-suction type gas detector is used for a long time, a large amount of dust possibly accumulates at the bottom of a filter screen, filter holes on the surface of the filter screen are blocked, and accordingly the air flow rate of air pumped into a sensor by an air pump is reduced, and the accuracy of air component detection of a gas sensitive element is influenced;
in order to solve the technical problems, the technical scheme in the embodiment of the invention has the following general idea:
by arranging the circular ring 52, the spring 54 and the elastic cloth 53, air is prevented from entering the cavity 51 through the filter net 521 due to the filter holes of the filter net 521 being in a blocked state, so that the air pump generates attraction force on the surface of the filter net 521, the filter net 521 drives the circular ring 52 to move on the inner wall of the cavity 51 under the action of the attraction force, the circular ring 52 drives the spring 54 to move, and the circular ring 52 pulls the elastic cloth 53 to extend continuously; the controller controls the air pump to stop, the attraction force disappears, the elastic cloth 53 can rapidly drive the ring 52 to move downwards, the ring 52 drives the spring 54 to collide with the inner wall of the bottom of the cavity 51, the spring 54 has elasticity, the spring 54 drives the ring 52 to vibrate up and down in the cavity 51, and then the dust at the bottom of the filter screen 521 falls off under the vibration effect.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
As shown in fig. 1 to 5, the harmful gas monitoring and early warning system for mines provided by the invention comprises a gas detector, wherein the gas detector comprises a detector 1, a wire inlet hole 2, an alarm 3, a sensor 4 and a gas cabin, the wire inlet hole 2 is fixedly connected to the side edge of the detector 1, the alarm 3 is fixedly connected to the side of the detector 1 away from the wire inlet hole 2, the sensor 4 is fixedly connected to the bottom of the detector 1, the gas cabin is arranged at the bottom of the sensor 4, and the gas cabin comprises:
the shell 5 is in threaded connection with the bottom of the sensor 4, and a cavity 51 is formed in the shell 5;
the outer side of the circular ring 52 is connected with the inner wall of the cavity 51 in a sliding manner, and the inner side of the circular ring 52 is fixedly connected with a filter screen 521;
the end part of the elastic cloth 53 is fixedly connected with the bottom of the circular ring 52, and the other end part of the elastic cloth 53 is fixedly connected with the inner wall of the bottom of the cavity 51;
the spring 54 is positioned outside the elastic cloth 53 and fixedly connected with the bottom of the circular ring 52;
and the controller controls the operation of the internal parts of the gas detector.
In the using process of the existing gas detector, the gas detector is firstly placed at a proper position on a mine wall, a notch is formed in the surface of a bottom plate of the detector 1, and a nail penetrates through the notch to be in contact with the inner wall of a mine, so that the detector 1 is fixed on the mine wall through the nail; one side of the detector 1 is fixedly connected with a wire inlet hole 2, the other side of the detector is fixedly connected with an alarm 3, the inside of the alarm 3 comprises a light alarm and a sound alarm, the end parts of the two-core cable are connected with the internal parts of the detector 1 through the wire inlet hole 2, and the other end parts of the two-core cable are connected with a combustible toxic gas alarm controller outside the detector 1;
when the gas pump is started, surrounding air components are pumped into the sensor 4 through the opening, then the air is detected through the gas sensitive element, and the content of toxic gas in the air is ensured to be in a safe range; if the air exceeds the standard, a controller in the detector 1 starts a light alarm and a sound alarm, and feeds back the detection condition to a combustible toxic gas alarm controller, so that the combustible toxic gas alarm controller controls an exhaust fan, an electromagnetic valve, a spraying system and a sound and light alarm lamp to start, and the air in the mine is dredged, and workers are warned and evacuated; however, a large amount of dust exists in the mine, and after the detector 1 is used for a long time, a large amount of dust may be accumulated on the surface of the filter screen at the opening, so that filter holes on the surface of the filter screen are blocked, the phenomenon that the air flow rate of the air pump pumped into the sensor 4 is reduced is caused, and the accuracy of detecting air components by the gas sensitive element is influenced.
In the invention, the inner wall of the opening at the bottom of the sensor 4 is provided with threads, so that the bottom of the sensor 4 is in threaded connection with the outer side surface of the top of the shell 5, and the shell 5 is detachably connected with the sensor 4; a cavity 51 is formed in the casing 5, the upper end and the lower end of the cavity 51 are both provided with openings, the opening at the upper part of the cavity 51 corresponds to the opening at the bottom of the sensor 4, a circular ring 52 is arranged in the cavity 51, the circular ring 52 is made of a corrosion-resistant plastic material, such as polytetrafluoroethylene, the plastic material is light in weight, and has the characteristics of heat resistance, cold resistance, corrosion resistance and the like, so that the service life of the circular ring 52 is prolonged; the inner side of the circular ring 52 is fixedly connected with a filter screen 521, the outer side of the circular ring 52 is connected with the inner wall of the cavity 51 in a sliding manner, the bottom of the circular ring 52 is connected with the inner wall of the bottom of the cavity 51 through elastic cloth 53, the end part of the elastic cloth 53 is positioned at the joint of the circular ring 52 and the filter screen 521, so that the elastic cloth 53 is enclosed between the bottom of the filter screen 521 and the bottom of the cavity 51, springs 54 are uniformly arranged between the outer side of the elastic cloth 53 and the side wall of the cavity 51, the end parts of the springs 54 are fixedly connected with the bottom of the circular ring 52, and one end of the springs 54, which is far away from the circular ring 52, is in a contact state with the inner wall of the bottom of the cavity 51 and is not fixedly connected with the inner wall of the bottom of the cavity 51;
in an initial state, the filter hole of the filter screen 521 is in an unblocked state, the controller controls the air pump to start, the air pump sucks external air into the cavity 51 through the bottom opening of the cavity 51, the air moves into the sensor 4 through the filter screen 521 and is detected by a gas sensor in the sensor 4, the air can directly pass through the filter hole due to the unobstructed state of the filter hole, so that the circular ring 52 is not moved in the cavity 51 by the flowing of the air under the action of the suction, so that the filter screen 521 is in a static state in the cavity 51, and the circular ring 52 is made of plastic, so that the weight of the circular ring 52 is light and the spring 54 is not easy to bend, the circular ring 52 is supported by the spring 54 inside the cavity 51, the distance between the bottom of the circular ring 52 and the bottom of the cavity 51 is equal to the length of the elastic cloth 53, and the elastic cloth 53 is driven by the spring 54 to be in a straightened and not tightened state through the circular ring 52;
when the air suction type air pump works, the filter holes of the filter screen 521 are in a blocked state, the controller controls the air pump to be started, the air pump sucks air to the periphery through the cavity 51, but the filter holes are in the blocked state, air is prevented from entering the cavity 51 through the filter screen 521, so that the air pump generates attraction force on the surface of the filter screen 521, the filter screen 521 is fixedly connected with the inner side of the circular ring 52, the outer side of the circular ring 52 is in sliding connection with the inner wall of the cavity 51, the bottom of the circular ring 52 is connected with the bottom of the cavity 51 through the elastic cloth 53, and under the action of the attraction force, the air pump drives the circular ring 52 to move on the inner wall of the cavity 51 through the filter screen 521, the circular ring 52 drives the spring 54 to move, the circular ring 52 pulls the elastic cloth 53 to continuously extend, and the non-tightened state is changed into the tightened state; the controller controls the air pump to stop, so that the suction force of the air pump on the surface of the ring 52 disappears, then the stretched elastic cloth 53 pulls the ring 52 downwards, the elastic cloth 53 drives the ring 52 to move downwards on the inner wall of the cavity 51, and due to the sudden disappearance of the suction force, the elastic force in the elastic cloth 53 is quickly released, so that the elastic cloth 53 drives the ring 52 to move downwards quickly, so that the ring 52 drives the spring 54 to collide with the inner wall of the bottom of the cavity 51, further the shape of the spring 54 changes, and the spring 54 pushes the ring 52 to move upwards for the purpose of deformation recovery, so that under the action of the spring 54 and the elastic cloth 53, the motion track of the ring 52 in the cavity 51 moves up and down in the process that the ring 52 recovers to the original position, the spring 54 repeatedly collides with the inner wall of the cavity 51, so that the surface of the ring 52 vibrates, further, the dust at the bottom of the filter screen 521 falls off under the action of vibration, and the effect of automatically cleaning the filter screen 521 holes is achieved.
According to the invention, by arranging the circular ring 52, the spring 54 and the elastic cloth 53, because the filtering hole of the filtering net 521 is in a blocking state, air is prevented from entering the cavity 51 through the filtering net 521, so that the air pump generates attraction force on the surface of the filtering net 521, under the action of the attraction force, the filtering net 521 drives the circular ring 52 to move on the inner wall of the cavity 51, the circular ring 52 drives the spring 54 to move, and the circular ring 52 pulls the elastic cloth 53 to continuously extend;
the controller controls the air pump to stop, the attraction force disappears, the elastic cloth 53 can rapidly drive the ring 52 to move downwards, the ring 52 drives the spring 54 to collide with the inner wall of the bottom of the cavity 51, the spring 54 has elasticity, the spring 54 drives the ring 52 to vibrate up and down in the cavity 51, and then the dust at the bottom of the filter screen 521 falls off under the vibration effect.
As an embodiment of the present invention, as shown in fig. 2, a latch 511 is fixedly connected to an inner wall of the cavity 51, and the latch 511 is located at an upper portion of the ring 52;
as an embodiment of the present invention, as shown in fig. 3, the sectional shape of the latch 511 is a semicircle;
as an embodiment of the present invention, as shown in fig. 2 and as shown in fig. 3, a rubber ring 522 is attached to the outer side of the circular ring 52;
in the invention, a plurality of layers of fixture blocks 511 are uniformly arranged on the inner wall of the cavity 51, the cross section of each layer of fixture blocks 511 is semicircular, and a gap is arranged between each layer of fixture blocks 511; when the filtering holes of the filtering net 521 are blocked, the air pump will generate attraction force on the surface of the ring 52, so that the ring 52 moves on the inner wall of the cavity 51, because the ring 52 has upward traction force on the elastic cloth 53, and the elastic cloth 53 also has downward traction force on the ring 52, under the action of the attraction force, the ring 52 moves slowly upwards on the inner wall of the cavity 51, and when the ring 52 passes through the multi-layer block 511, an uneven path is formed by the block 511 and the inner wall of the cavity 51, and the path is in contact with the outer side of the ring 52, so that the vibration amplitude of the ring 52 is small, and dust accumulated at the bottom 521 of the filtering net is difficult to shake off;
when the air pump stops to cause the suction force to disappear, the elastic cloth 53 will rapidly drive the circular ring 52 to move downwards through the self elastic force, and the moving speed of the circular ring 52 influences the vibration amplitude of the circular ring 52 on the uneven path, so that when the circular ring 52 passes through the uneven path, the circular ring 52 indirectly contacts the fixture block 511 through the outer side, the vibration amplitude of the circular ring 52 is increased, and the dust accumulated at the bottom of the filter screen 521 is accelerated to shake off; the rubber ring 522 is arranged on the outer side of the circular ring 52, and the outer side of the circular ring 52 is tightly contacted with the inner wall of the cavity 51 and the fixture block 511 through the rubber ring 522, so that the circular ring 52 is in sliding sealing connection on the inner wall of the cavity 51; meanwhile, the sectional shape of the latch 511 is set to be semicircular, so that friction force between the latch 511 and the outer side of the ring 52 is reduced, and smoothness of movement of the outer side of the ring 52 on the surface of the latch 511 is increased.
According to the invention, the fixture blocks 511 are arranged, the multiple layers of fixture blocks 511 are uniformly arranged on the inner wall of the cavity 51, and the fixture blocks 511 and the inner wall of the cavity 51 form an uneven path, when the air pump stops to cause the suction force to disappear, the elastic cloth 53 can rapidly drive the circular ring 52 to move downwards, and when the air pump passes through the uneven path, the outer side of the circular ring 52 is in indirect contact with the fixture blocks 511, so that the circular ring 52 is integrally vibrated, the shaking-off of dust accumulated at the bottom of the filter screen 521 is accelerated, and the working efficiency of dredging the filter holes of the filter screen 521 is improved.
As an embodiment of the present invention, as shown in fig. 4, a sponge pad 523 is disposed on the upper surface of the circular ring 52, and the bottom of the sponge pad 523 is connected to the upper surface of the circular ring 52 through a magnet;
as an embodiment of the present invention, as shown in fig. 4, a vent hole 524 is formed in a surface of the foam pad 523, and the vent hole 524 is located above the filter net 521;
as an embodiment of the present invention, as shown in fig. 5, the vent hole 524 is shaped as a bell;
in the invention, the upper surface of the circular ring 52 is provided with the spongy cushion 523, the bottom of the spongy cushion 523 is provided with the iron sheet, and the upper surface of the circular ring 52 is fixedly connected with the magnet, so that the spongy cushion 523 is connected with the circular ring 52 through the magnet, and the spongy cushion 523 is detachably connected with the circular ring 52; the humidity of the mine air may affect the detection result of the gas sensor and may cause damage to the components inside the detector 1, so that the sponge pad 523 absorbs the moisture in the air, the humidity of the air is reduced, the accuracy of the gas sensor in detecting harmful gas is affected, and the service life of the gas detector 1 is prolonged;
and air vent 524 has been seted up on the surface at foam-rubber cushion 523, under the effect of induced draft, the air will contact with the gas sensing element through filter screen 521 and air vent 524, air vent 524 reduces the resistance of foam-rubber cushion 523 to the air flow on the one hand, on the other hand increases the area that foam-rubber cushion 523 contacts with the air, accelerate the speed that foam-rubber cushion 523 adsorbs air moisture, and set up the shape of air vent 524 into the horn mouth, under the effect of induced draft, increase the scope that air vent 524 absorbs ambient air, accelerate the air to pass through the inside speed of foam-rubber cushion 523, and when the air passes through air vent 524, the inner wall of air vent 524 slope, further increase the area of contact with the air, improve the efficiency that foam-rubber cushion 523 adsorbs air moisture.
According to the air-sensitive gas sensor, the spongy cushion 523 and the vent hole 524 are arranged, when air is in contact with the spongy cushion 523 through the filter screen 521, the spongy cushion 523 absorbs moisture in the air, the moisture of the air is prevented from entering the sensor 4 and the detector 1, and the corrosion of parts in the detector 1 is possibly caused, and the vent hole 524 is formed in the surface of the spongy cushion 523, so that the contact area of the spongy cushion 523 and the air is increased, the speed of the spongy cushion 523 for absorbing the moisture in the air is increased, meanwhile, the spongy cushion 523 is detachably connected with the upper surface of the ring 52, after the spongy cushion 523 is used for a period of time, the spongy cushion 523 can be replaced by a new spongy cushion 523, so that the dry air is ensured to be in contact with the gas-sensitive element, and the influence of the humidity of the air on the accuracy of the gas-sensitive element for detecting harmful gas is reduced.
As an embodiment of the present invention, as shown in fig. 2, the elastic fabric 53 is made of oxford fabric;
as an embodiment of the present invention, as shown in fig. 2, the end of the elastic cloth 53 is connected to the inner wall of the bottom of the cavity 51 by a hook and loop fastener;
as an embodiment of the present invention, as shown in fig. 4 and fig. 5, the surface of the stretch cloth 53 is fixedly connected with a bump 531;
in the invention, one end of the elastic cloth 53, which is far away from the bottom of the ring 52, is provided with a male magic tape, the inner wall of an opening at the bottom of the cavity 51 is fixedly connected with a female magic tape, a plurality of looped piles are woven on the inner surface of the male magic tape, a plurality of small hooks are woven on the inner side surface of the female magic tape, the male magic tape and the female magic tape are aligned and then slightly extruded, the looped piles are hooked by the hooks, so that the male magic tape and the female magic tape are connected, the end part of the elastic cloth 53 is connected with the inner wall at the bottom of the cavity 51 through the male magic tape and the female magic tape, the end part of the elastic cloth 53 is detachably connected with the inner wall of the cavity 51, after the elastic cloth is used for a period of time, the end part of the elastic cloth 53 is disconnected with the inner wall at the bottom of the cavity 51, so that the elastic cloth 53 is taken out of the cavity 51, the inner side of the elastic cloth 53 can be cleaned, and the surface of the elastic cloth 53 is ensured to be clean;
the elastic cloth 53 is made of oxford cloth, the oxford cloth has the characteristics of good elasticity, good water resistance, wear resistance and the like, and compared with the plush fabric, the plush fabric generates static electricity due to mutual friction among surface fluff, so that dust in the air is adsorbed on the surface of the plush fabric, and the oxford cloth has the anti-static property, so that the dust is reduced to be adsorbed on the surface of the elastic cloth 53; meanwhile, the inner side surface of the elastic cloth 53 is uniformly provided with the convex blocks 531, when the air pump pumps the surrounding air through the cavity 51, part of the air moves to the filter screen 521 along the surface of the elastic cloth 53, and when the air flows between the convex blocks 531, the gaps between the convex blocks 531 prevent the dust in the air from moving and keep the dust between the convex blocks 531; when the circular ring 52 vibrates in the cavity 51, the circular ring 52 drives the elastic cloth 53 to shake, so that dust between the convex blocks 531 is separated from the elastic cloth 53 under the shaking effect, the elastic cloth 53 has the air purification effect through the convex blocks 531, and the frequency of blockage of the filter screen 521 caused by accumulation of a large amount of dust at the bottom of the filter screen 521 is reduced.
According to the invention, by arranging the magic tape and the convex blocks 531, when air flows between the convex blocks 531, the gaps between the convex blocks 531 can prevent dust in the air from moving, the dust is stopped between the convex blocks 531, when the circular ring 52 vibrates in the cavity 51, the circular ring 52 can drive the elastic cloth 53 to shake, so that the dust between the convex blocks 531 is separated from the elastic cloth 53 under the shaking effect, the inner side surface of the elastic cloth 53 is further cleaned, meanwhile, through the arrangement of the magic tape, the detachable connection is formed between the end part of the elastic cloth 53 and the inner wall of the cavity 51, after the elastic cloth 53 is used for a period of time, the dust can be taken out from the cavity 51, the inner side of the elastic cloth 53 is cleaned, the residue between the dust convex blocks 531 is reduced, the air purification effect of the elastic cloth 53 through the convex blocks 531 is improved, and the frequency of blockage of the filter screen 521 caused by accumulation of a large amount of dust at the bottom of the filter screen 521 is reduced.
The specific working process is as follows:
in the invention, the bottom of the sensor 4 is in threaded connection with the top of the machine shell 5, the spongy cushion 523 is connected with the magnet on the upper surface of the circular ring 52, and the end part of the elastic cloth 53 is connected with the inner wall of the bottom of the cavity 51 through a magic tape, so that the sensor 4 is detachably connected with the machine shell 5, the spongy cushion 523 is connected with the circular ring 52, and the elastic cloth 53 is connected with the cavity 51;
when the filter holes of the filter screen 521 are not blocked, the controller controls the air pump to start, so that the air pump sucks external air into the cavity 51 through the bottom opening of the cavity 51, the air moves into the sensor 4 through the filter screen 521 and the sponge pad 523 and is detected by a gas sensor in the sensor 4, the air can directly pass through the filter holes due to the fact that the filter holes are in a smooth state, the ring 52 is not moved in the cavity 51 due to the flowing of the air under the action of the air suction, the filter screen 521 is in a static state in the cavity 51, the spring 54 supports the ring 52 in the cavity 51, the distance between the bottom of the ring 52 and the bottom of the cavity 51 is equal to the length of the elastic cloth 53, and the spring 54 drives the elastic cloth 53 to be in a stretched and non-tightened state through the ring 52;
when the filter holes of the filter screen 521 are in a blocked state, the controller controls the air pump to start, the air pump sucks air to the periphery through the cavity 51, but the filter holes are in the blocked state, air is prevented from entering the cavity 51 through the filter screen 521, so that the air pump generates attraction force on the surface of the filter screen 521, under the action of the attraction force, the air pump drives the ring 52 to move on the inner wall of the cavity 51 through the filter screen 521, the ring 52 drives the spring 54 to move, the ring 52 pulls the elastic cloth 53 to continuously extend, and the non-tightened state is changed into a tightened state; the controller controls the air pump to stop, so that the attractive force of the air pump on the surface of the circular ring 52 disappears, then the stretched elastic cloth 53 has downward pulling force on the circular ring 52, the elastic cloth 53 drives the circular ring 52 to move downwards on the inner wall of the cavity 51, and due to the sudden disappearance of the attractive force, the elastic force in the elastic cloth 53 is rapidly released, and the elastic cloth 53 drives the circular ring 52 to rapidly move downwards; when the circular ring 52 passes through an uneven path, the outer side of the circular ring 52 is in indirect contact with the fixture blocks 511, so that the circular ring 52 vibrates integrally, meanwhile, when the circular ring 52 drives the springs 54 to collide with the inner wall of the bottom of the cavity 51, the shapes of the springs 54 are changed, and the springs 54 push the circular ring 52 to move upwards in order to restore deformation, so that under the action of the springs 54 and the elastic cloth 53, the movement track of the circular ring 52 in the cavity 51 moves upwards and downwards in the process that the circular ring 52 restores to the original position, and the springs 54 repeatedly collide with the inner wall of the cavity 51 until the initial state is restored.
The front, the back, the left, the right, the upper and the lower are based on the observation angle of the person, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.
In the description of the present invention, it is to be understood that the terms "central", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in fig. 1, and are used merely to facilitate the description of the present invention and to simplify the description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be taken as limiting the scope of the present invention.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a harmful gas monitoring and early warning system for mine, this system includes gaseous detection instrument, gaseous detection instrument includes detector (1), entrance hole (2), alarm (3), sensor (4) and gas chamber, detector (1) side has linked firmly entrance hole (2), one side that entrance hole (2) were kept away from in detector (1) has linked firmly alarm (3), detector (1) bottom has linked firmly sensor (4), its characterized in that, sensor (4) bottom is provided with the gas chamber, the gas chamber includes:
the shell (5), the shell (5) is in threaded connection with the bottom of the sensor (4), and a cavity (51) is formed in the shell (5);
the outer side of the circular ring (52) is connected with the inner wall of the cavity (51) in a sliding manner, and the inner side of the circular ring (52) is fixedly connected with a filter screen (521);
the end part of the elastic cloth (53) is fixedly connected with the bottom of the circular ring (52), and the other end part of the elastic cloth (53) is fixedly connected with the inner wall of the bottom of the cavity (51);
the spring (54) is positioned outside the elastic cloth (53) and fixedly connected with the bottom of the circular ring (52);
and the controller controls the operation of the internal parts of the gas detector.
2. The mine harmful gas monitoring and early warning system as claimed in claim 1, wherein a block (511) is fixedly connected to the inner wall of the cavity (51), and the block (511) is positioned at the upper part of the circular ring (52).
3. The harmful gas monitoring and early warning system for the mine as claimed in claim 2, wherein: the cross section of the fixture block (511) is semicircular.
4. The harmful gas monitoring and early warning system for the mine as claimed in claim 1, wherein: the outer side of the circular ring (52) is fixedly connected with a rubber ring (522).
5. The monitoring and early-warning system for harmful gases in mines as claimed in claim 4, wherein the upper surface of the circular ring (52) is provided with a sponge pad (523), and the bottom of the sponge pad (523) is connected with the upper surface of the circular ring (52) through a magnet.
6. The harmful gas monitoring and early warning system for the mine as claimed in claim 5, wherein: the surface of the sponge cushion (523) is provided with vent holes (524), and the vent holes (524) are positioned above the filter screen (521).
7. The harmful gas monitoring and early warning system for the mine as claimed in claim 7, wherein: the vent hole (524) is shaped as a bell mouth.
8. The harmful gas monitoring and early warning system for the mine as claimed in claim 1, wherein: the elastic cloth (53) is made of oxford cloth.
9. The system for monitoring and warning harmful gas for mine according to claim 9, characterized in that: the end part of the elastic cloth (53) is connected with the inner wall of the bottom of the cavity (51) through a magic tape.
10. The harmful gas monitoring and early warning system for the mine as claimed in claim 10, wherein: the surface of the elastic cloth (53) is fixedly connected with a convex block (531).
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| CN202210548018.XA CN115318022B (en) | 2022-05-18 | 2022-05-18 | Harmful gas monitoring and early warning system for mine |
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| CN115318022B (en) | 2023-08-01 |
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