CN114688112A - Automatic control system of blast furnace hydraulic tapping machine and blast furnace hydraulic tapping machine - Google Patents
Automatic control system of blast furnace hydraulic tapping machine and blast furnace hydraulic tapping machine Download PDFInfo
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- CN114688112A CN114688112A CN202210422268.9A CN202210422268A CN114688112A CN 114688112 A CN114688112 A CN 114688112A CN 202210422268 A CN202210422268 A CN 202210422268A CN 114688112 A CN114688112 A CN 114688112A
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- 238000010079 rubber tapping Methods 0.000 title claims abstract description 50
- 238000010009 beating Methods 0.000 claims abstract description 32
- 239000011435 rock Substances 0.000 claims description 25
- 238000005553 drilling Methods 0.000 claims description 11
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 4
- 230000035939 shock Effects 0.000 claims description 2
- 238000005086 pumping Methods 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 4
- 230000003116 impacting effect Effects 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Blast Furnaces (AREA)
Abstract
The invention discloses an automatic control system of a blast furnace hydraulic tapping machine and the blast furnace hydraulic tapping machine, and belongs to the technical field of metallurgical equipment. The system comprises a main control valve group, a rotary oil way, a propulsion oil way, an impact oil way and a reverse oil way, wherein the rotary oil way comprises a forward rotary oil way and a reverse rotary oil way; the propulsion oil way comprises a forward oil way and a backward oil way; the impact oil path comprises an impact oil inlet path and an impact oil return path; the reverse pumping oil way comprises a reverse pumping oil inlet way and a reverse pumping oil return way; the rotary oil way, the propulsion oil way and the impact oil way are all connected with the main control valve group; a propulsion control valve group is arranged on the propulsion oil way and connected with the positive rotation oil way; an impact control valve group is arranged on the impact oil inlet oil way and connected with the retreating oil way; and a reverse beating control valve group is arranged on the reverse beating oil inlet oil way and is connected with the retreating oil way. The blast furnace hydraulic tapping machine comprises the proposed control system. The invention can effectively prevent the drill rod from being blocked in the opening process of the blast furnace.
Description
Technical Field
The invention belongs to the technical field of metallurgical equipment, and particularly relates to an automatic control system of a blast furnace hydraulic tapping machine and the blast furnace hydraulic tapping machine.
Background
Blast furnace iron making is a common iron making mode at present, opening operation is a crucial production link in front of a blast furnace, and the opening operation is that a tapping hole of the blast furnace is drilled through by tapping machine equipment so that molten iron generated in the blast furnace is discharged through a hole channel of the tapping hole. In the tapping work, the tapping work is performed by a blast furnace hydraulic tapping machine.
In the working process of the blast furnace hydraulic tapping machine, due to the complex working condition, a stokehold operator needs to stand in the stokehold to frequently operate a control handle to ensure that the occurrence of drill bit/drill rod clamping accidents in the whole tapping process is avoided or reduced in the tapping process. If a drill rod clamping accident occurs, field workers need to perform flame cutting to break the drill rod (oxygen flame repair welding) before the furnace, so that great safety risk exists, and the production efficiency of blast furnace equipment is greatly influenced; and also increases the production cost because of the need to sever the drill pipe.
Disclosure of Invention
The technical problem is as follows: the invention provides an automatic control system of a hydraulic tapping machine of a blast furnace, which can effectively prevent drill rod from being blocked and can effectively prevent reverse striking, and the hydraulic tapping machine of the blast furnace using the system.
The technical scheme is as follows: in a first aspect, the present invention provides an automatic control system for a hydraulic tapping machine of a blast furnace, comprising:
a main control valve group;
the rotary oil path is used for driving the rotary motor to rotate forwards and backwards, and comprises a forward rotation oil path and a reverse rotation oil path;
the propelling oil path is used for driving the propelling motor to move forwards and backwards and comprises a forward oil path and a backward oil path;
the impact oil way is used for impact control of an impact module of the rock drill and comprises an impact oil inlet oil way and an impact oil return oil way;
the reverse-beating oil circuit is used for controlling a reverse-beating module of the rock drill and comprises a reverse-beating oil inlet circuit and a reverse-beating oil return circuit;
the rotary oil way, the propelling oil way and the impact oil way are all connected with the main control valve group;
a propulsion control valve group is arranged on the propulsion oil way and connected with the positive rotation oil way; an impact control valve group is arranged on the impact oil inlet oil way and connected with the retreating oil way; and a reverse beating control valve group is arranged on the reverse beating oil inlet oil way and is connected with the retreating oil way.
Further, the propulsion control valve group comprises a first valve block, a second valve block and a third valve block;
the first valve block comprises a first hydraulic control reversing valve and a second hydraulic control reversing valve;
the second valve block comprises a third hydraulic control reversing valve, a fourth hydraulic control reversing valve, a fifth hydraulic control reversing valve, a one-way valve and a first overflow valve;
the third valve block comprises a sixth hydraulic control reversing valve, a seventh hydraulic control reversing valve and a manual reversing valve.
Further, the impact control valve group comprises an eighth hydraulic control reversing valve, a ninth hydraulic control reversing valve, a first speed regulating valve and a shuttle valve.
Furthermore, the reverse-beating control valve group is a hydraulic control reversing valve.
Furthermore, the system also comprises a buffer oil way, the buffer oil way is connected with the impact control valve group, and a buffer valve block is arranged on the buffer oil way.
Further, the buffer valve block is a speed regulating valve.
Further, the control is performed by using the positive rotation pressure oil as the signal oil, and the control method comprises the following steps:
when the rotary pressure is greater than a first set value, the rotary pressure signal oil changes the propelling speed of the propelling trolley by changing the opening of a propelling control valve group on the propelling loop, so as to prevent drill rod jamming;
when the rotation pressure is greater than a second set value, the rotation pressure signal oil controls to change the pushing direction by reversing a pushing control valve group on a pushing loop, so that the pushing trolley retreats to prevent drill rod clamping;
when the impact and propulsion are required to be forced, an operator can shield the control of the propulsion by cutting off the rotary pressure signal oil;
when the trolley is pushed forwards, the reverse beating oil way is cut off so as to shield the reverse beating function; when the trolley retreats, the reversing control valve set is reversed through a trolley propulsion motor retreating signal oil, the reversing function is activated, and the drill rod is prevented from being clamped.
Furthermore, when the buffer pressure is lower than a third set value, the direction of the impact control valve group is changed to change the flow entering the rock drilling machine, and the impact pressure is reduced to protect the rock drilling machine.
In a second aspect, the invention provides a hydraulic tapping machine for a blast furnace, which comprises the automatic control system for the hydraulic tapping machine for the blast furnace.
Compared with the prior art, the control system disclosed by the invention has the advantages that the propelling control valve group, the rushing-in control valve group, the reverse-opening control valve group and the corresponding oil circuit relation are arranged, so that the control system disclosed by the invention can effectively prevent the drill rod from being blocked in the opening process of the blast furnace, the labor intensity and the safety risk of field workers are greatly reduced, one-key opening is realized, and the production efficiency of the blast furnace is improved.
Drawings
FIG. 1 is a schematic structural view of a conventional hydraulic tapping machine for a blast furnace;
FIG. 2 is a schematic diagram of an automatic control system of a hydraulic tapping machine for a blast furnace;
FIG. 3 is a schematic diagram of a propulsion control valve assembly;
FIG. 4 is a schematic diagram of a first valve block;
FIG. 5 is a schematic diagram of a second valve block;
FIG. 6 is a schematic diagram of a third valve block;
FIG. 7 is a schematic diagram of a shock control valve assembly;
FIG. 8 is a schematic diagram of a reverse trip control valve assembly;
FIG. 9 is a schematic diagram of a main control valve block.
The figure shows that:
100. a main control valve group; 110. a tenth hydraulic control directional control valve; 120. an eleventh hydraulic control directional valve; 130. a twelfth hydraulic control directional control valve; 140. hydraulic locking; 150. a second overflow valve; 160. a third overflow valve; 170. a fourth spill valve; 180. a fifth overflow valve;
200. a rotary oil path; 210. a positive rotation oil way; 220. a reverse rotation oil path;
300. a propulsion oil circuit; 310. an advancing oil path; 320. a retreat oil path; 330. a propulsion control valve block; 331. a first valve block; 3310. a first hydraulic control directional control valve; 3311. a second hydraulic control directional control valve; 332. a second valve block; 3320. a third hydraulic control directional control valve; 3321. a fourth hydraulic control directional control valve; 3322; a fifth hydraulic control directional control valve; 3323. a first overflow valve; 3324. a one-way valve; 333. a third valve block; 3330. a sixth hydraulic control directional control valve; 3331. a seventh hydraulic control directional control valve; 3332. a manual directional control valve;
400. an impact oil path; 410. impacting the oil inlet path; 420. impacting an oil return path; 430. an impact control valve group; 431. an eighth hydraulic control directional control valve; 432. a ninth hydraulic control directional valve; 433. a first speed regulating valve; 434. a shuttle valve; 440. impacting an oil drainage oil way;
500. reversely pumping an oil way; 510. reversely pumping an oil inlet circuit; 520. reversely pumping an oil return way; 530. reversely beating the control valve group;
600. a buffer oil path; 610. a cushion valve block;
700. a blast furnace hydraulic tapping machine; 710. a rotary motor; 720. a propulsion motor; 730. a rock drill; 731. an impact module; 732. a reverse beating module; 733. a buffer module; 740. a trolley; 750. a hydraulic pump; 760. and an oil tank.
Detailed Description
The invention is further described with reference to the following examples and the accompanying drawings. It is noted that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as limiting in number and nature.
Fig. 1 shows a schematic structural view of a conventional hydraulic tapping machine for a blast furnace, and as shown in fig. 1, a hydraulic tapping machine 700 for a blast furnace includes a rock drill 730 and a carriage 740 for driving the rock drill 730; the automatic control system of the blast furnace hydraulic tapping machine provided by the embodiment of the invention can be used for hydraulically controlling the blast furnace hydraulic tapping machine. The carriage 740 is driven by the propulsion motor 720 to advance and retract, thereby propelling the rock drill 730 to advance and retract. The shank 770 of the rock drill 730 may open the tap hole 780. The rock drill 730 comprises a slewing module, a percussion module 731, a backhoe module 732 and a buffer module 733, where the slewing module comprises a slewing motor 710.
Fig. 2 shows a blast furnace hydraulic tapping machine automatic control system provided in an example of the present invention. Referring to fig. 2, the system includes a main control valve block 100, a swing oil passage 200, a thrust oil passage 300, an impact oil passage 400, and a reverse pumping oil passage 500. The rotary oil path 200 may be used to drive the rotary motor 710 to rotate forward and backward, and the rotary oil path includes a forward oil path 210 and a backward oil path 220. As shown in fig. 2, the forward rotation oil path 210 and the reverse rotation oil path 220 are connected to the rotary motor 710, and when oil is taken into the forward rotation oil path 210, the rotary motor rotates forward, and when oil is taken into the reverse rotation oil path 220, the rotary motor rotates backward. The propulsion oil path 300 is used for driving the propulsion motor 720 to move forward and backward, and the propulsion oil path 300 includes a forward oil path 310 and a backward oil path 320. The forward oil path 310 and the backward oil path 320 are connected to the propulsion motor 720, the cart 740 is propelled forward when the forward oil path 310 takes oil, and the cart 740 is retracted when the backward oil path 320 takes oil. The impact oil path 400 is used for impact control of an impact module 731 of the rock drilling machine 730, and the impact oil path 400 comprises an impact oil inlet path 410 and an impact oil return path 420; the impact oil inlet path 410 and the impact oil return path 420 are connected to an impact module of the rock drill 730 and are used for impact oil inlet and oil return respectively. The reverse pumping oil path 500 is used for controlling the reverse pumping module 732, and the reverse pumping oil path 500 comprises a reverse pumping oil inlet path 510 and a reverse pumping oil return path 520; the reverse beating oil inlet path 510 and the reverse beating oil return path 520 are connected to a reverse beating module of the rock drilling machine and are used for oil inlet and oil return respectively.
The rotary oil path 200, the propulsion oil path 300 and the impact oil path 400 are all connected with the main control valve group 100; the main control valve block 100 may be directly connected to the hydraulic pump 750, and each oil path may be controlled by the main control valve block 100. In order to realize the automatic control of the blast furnace hydraulic tapping machine 700, a propulsion control valve group 330 is arranged on the propulsion oil way 300, and the propulsion control valve group 330 is connected with the positive rotation oil way 210; an impact control valve group 430 is arranged on the impact oil inlet channel 410, and the impact control valve group 430 is connected with the retreat oil channel 320; a reverse opening control valve group 530 is arranged on the reverse opening oil inlet path 510, and the reverse opening control valve group 530 is connected with the reverse oil path 320.
In one example of the present invention, as shown in fig. 3, the propulsion control valve assembly 330 includes: a first valve block 331, a second valve block 332, and a third valve block 333, and a 1-a 6 ports. As shown in fig. 3 and 4, the first valve block 331 includes a first pilot operated directional valve 3310 and a second pilot operated directional valve 3311. Wherein, the second port of the first pilot-controlled change-over valve 3310 is connected with the A2 oil port, the fourth port of the first pilot-controlled change-over valve 3310 is connected with the A1 oil port, the third port of the first pilot-controlled change-over valve 3310 is connected with the A4 oil port, and the fifth port of the first pilot-controlled change-over valve 3310 is connected with the A5 oil port; the first port of the first pilot operated directional control valve 3310 is connected to the port a6, and the port a6 is connected to the tank 760. The first port of the second hydraulic control reversing valve is connected with an oil port A4, the second port of the second hydraulic control reversing valve is connected with an oil port A6, and the third port of the second hydraulic control reversing valve is connected with an oil port A6.
As shown in fig. 3 and 5, the second valve block 332 includes a third pilot-controlled directional valve 3320, a fourth pilot-controlled directional valve 3321, a fifth pilot-controlled directional valve 3322, a check valve 3324, and a first relief valve 3323. The third port of the third hydraulic control reversing valve 3320 is connected with the oil port A2 and the first port of the check valve 3324; the port II of the third hydraulic control reversing valve 3320 is connected with the port IV of the fifth hydraulic control reversing valve 3322 and the port II of the one-way valve 3324; a port I of the third hydraulic control reversing valve 3320 is connected with a port II of the fourth hydraulic control reversing valve 3321; the port (four) of the third hydraulic control reversing valve 3320 is connected with the port (three) of the fourth hydraulic control reversing valve 3321. The second port of the fifth hydraulic control reversing valve 3322 is connected with the oil port A1; a third port of the fifth hydraulic control reversing valve 3322 is connected with an A4 oil port, and a fifth port of the fifth hydraulic control reversing valve 3322 is connected with an A5 oil port; the sixth port of the fifth hydraulic control directional valve 3322 is connected with the first port of the first overflow valve 3323.
As shown in fig. 3 and 6, the third valve block 333 includes a sixth pilot operated directional valve 3330, a seventh pilot operated directional valve 3331, and a manual directional valve 3332. The port I of the sixth hydraulic control reversing valve 3330 is connected to the port A4; the second port of the sixth hydraulic control directional control valve 3330 is connected to the first port of the seventh hydraulic control directional control valve 3331. A port III of the seventh hydraulic control reversing valve 3331 is connected with a port I of the fourth hydraulic control reversing valve 3321 and a port I of the fifth hydraulic control reversing valve 3322; the second port of the seventh hydraulic control reversing valve 3331 is connected with the second port of the manual reversing valve 3332; and a third port of the seventh hydraulic control reversing valve 3331 is connected with an A3 oil port. The oil port a3 is connected to the positive rotation oil path 210, and the connection between the propulsion control valve group 330 and the positive rotation oil path 210 is realized. The port a1 of the propulsion control valve group 330 is connected to the propulsion motor 720 through the forward oil passage 310, and the port a2 is connected to the propulsion motor 720 through the reverse oil passage 320.
As shown in fig. 7, the impact control valve group 430 includes an eighth hydraulic control directional control valve 431, a ninth hydraulic control directional control valve 432, a first speed regulating valve 433 and a shuttle valve 434, and B1-B5 oil ports are arranged on the impact control valve group 430, wherein a port c of the eighth hydraulic control directional control valve 431 is connected with a port B1, a port c of the eighth hydraulic control directional control valve 431 is connected with a port B3, and a port c of the eighth hydraulic control directional control valve 431 is connected with a port B3 and is connected with a port c of the ninth hydraulic control directional control valve 432; the port I of the ninth hydraulic control reversing valve 432 is connected with the port II of the shuttle valve 434; the port I of the shuttle valve 434 is connected with the oil port B2; the port c of the shuttle valve 434 is connected with the port B4. The second port of the first speed regulating valve 433 is connected with the oil port B1, and the first port of the first speed regulating valve 433 is connected with the oil port B3. The B2 oil port is connected to the rearward oil passage 320, and the impact control valve group 430 is connected to the rearward oil passage 320. An impact control valve block 430 is disposed on the impact oil inlet path 410 with ports B1 and B3.
As shown in fig. 8, the reverse-opening control valve set 530 may be a pilot-controlled directional valve, and the port # c of the reverse-opening control valve set 530 is connected to the port B5 of the impact control valve set 430, so that the connection between the reverse-opening control valve set 530 and the backward oil path 320 is realized. The reverse-beating control valve group 530 is arranged on the reverse-beating oil inlet path 510 through the port two and the port four.
As shown in fig. 9, the main control valve block 100 may be a main control valve block of a conventional blast furnace hydraulic tapping machine 700, for example, fig. 9 shows a structural form of the main control valve block 100. The main control valve group 100 comprises a tenth pilot-controlled directional control valve 110, an eleventh pilot-controlled directional control valve 120 and a twelfth pilot-controlled directional control valve 130, wherein a port a and a port B of the tenth pilot-controlled directional control valve 110 are respectively connected with a port C1 and a port C2 through a hydraulic lock 140; a second overflow valve 150 and a third overflow valve 160 are connected in parallel to a line between the hydraulic lock 140 and the ports C1 and C2, and the tenth pilot-operated directional control valve 110 is used to control the supply of oil to the propulsion oil path 300. The P port and the T port of the tenth pilot-controlled directional control valve 110 are connected to the C12 oil port and the C11 oil port, respectively. The port A of the eleventh hydraulic control reversing valve 120 is connected with the port C3; the port B of the eleventh hydraulic control reversing valve 120 is connected with the port C4; the P port of the eleventh hydraulic control reversing valve 120 is connected with the C10 oil port; the T port of the eleventh hydraulic control reversing valve 120 is connected with the C9 oil port. A fourth relief valve 170 and a fifth relief valve 180 are arranged in parallel between a pipeline connecting the port C3 at the port a of the eleventh pilot-controlled directional control valve 120 and a pipeline connecting the port C4 at the port B of the eleventh pilot-controlled directional control valve 120. The eleventh pilot-operated directional control valve 120 is used to control the supply of oil to the rotary oil passage 200. The port A of the twelfth hydraulic control reversing valve 130 is connected with the port C6, and the port P of the twelfth hydraulic control reversing valve 130 is connected with the port C7; the twelfth pilot-controlled directional control valve 130 is used to control the supply of oil to the surge tank. The C5 oil port is connected with the C8 oil port. Wherein, the oil ports C7-C12 are mainly connected with a hydraulic pump 750.
The impact oil path 400 further includes an impact drain oil path 440, and the impact drain oil path 440 and the reverse drain oil path 520 are directly connected to an oil tank 760.
The utilization is above-mentioned system, and the pressure oil is controlled as signal oil to the positive rotation, includes:
when the rotary pressure is greater than a first set value (50-80bar), the rotary pressure signal oil changes the propelling speed of the propelling trolley by changing the opening of the propelling control valve group on the propelling loop, so as to prevent drill rod jamming.
When the rotary pressure is greater than a second set value (90-130bar), the rotary pressure signal oil controls to change the propelling direction by reversing a propelling control valve group on a propelling loop, so that the propelling trolley retreats and the drill rod is prevented from being clamped.
When a forceful impact and propulsion is required, the operator can shield the control of the propulsion by cutting off the rotary pressure signal oil.
According to the working condition requirement, the pushing trolley needs to be quickly returned when returning, so that the damage to the tapping machine caused by the molten iron gushing is prevented. In order to meet the requirement of fast backing, the first valve block 331 in the propulsion control valve group changes the direction of the valve core through the pressure signal of the backing of the trolley, thereby increasing the opening of the valve, increasing the oil inlet and return area and achieving the function of fast backing.
In order to realize automatic opening and simultaneously solve the problem of drill rod clamping through reverse driving, a reverse driving control valve is added in a reverse driving loop in a system provided with a reverse driving rock drill, so that the reverse driving function is realized when the propelling trolley retreats. When the trolley is pushed forwards, the reverse beating oil way is cut off so as to shield the reverse beating function; when the trolley retreats, the reverse beating control valve is reversed through a trolley propulsion motor retreating signal oil, and the reverse beating function is activated, so that the drill rod clamping is avoided.
Further, in the embodiment of the invention, in order to meet the performance requirements of the rock drilling machine, a path of pressure oil with constant flow needs to be introduced to serve as buffer oil, so that the components of the rock drilling machine are protected, and the service life of the rock drilling machine is prolonged. Therefore, the control system further includes a damping oil passage 600, and the damping oil passage 600 is connected to the impact control valve group 430, specifically, to the B4 oil port of the impact control valve group 430. The buffer oil path 600 is provided with a buffer valve block 610, and in one embodiment, the buffer valve block 610 may be a speed regulating valve.
In order to protect the components of the rock drill and prolong the service life of the rock drill, when the buffer pressure is lower than a third set value (40-60Bar), the direction of the impact control valve set 430 is changed to change the flow entering the rock drill, so that the impact pressure is reduced, and the rock drill is protected.
The automatic control system of the hydraulic tapping machine of the blast furnace can effectively prevent drill steel from being clamped during tapping, greatly reduce the labor intensity and safety risk of field workers, realize one-key tapping and improve the production efficiency of the blast furnace.
Further, the invention provides a blast furnace hydraulic tapping machine, which comprises the automatic control system for the blast furnace hydraulic tapping machine, and the automatic control system is used for automatic control, so that the structure of the automatic control system is not repeated.
The above examples are only preferred embodiments of the present invention, it should be noted that: it will be apparent to those skilled in the art that various modifications and equivalents can be made without departing from the spirit of the invention, and it is intended that all such modifications and equivalents fall within the scope of the invention as defined in the claims.
Claims (9)
1. The utility model provides a blast furnace hydraulic tapping machine automatic control system which characterized in that includes:
a main control valve group (100);
a swing oil path (200) for driving a swing motor (710) to rotate forward and backward, the swing oil path including a forward oil path (210) and a backward oil path (220);
a propulsion oil path (300) for driving a propulsion motor (720) to move forward and backward, the propulsion oil path (300) including a forward oil path (310) and a backward oil path (320);
the impact oil path (400) is used for impact control of an impact module (731) of the rock drilling machine (730), and the impact oil path (400) comprises an impact oil inlet path (410) and an impact oil return path (420);
the reverse-beating oil circuit (500) is used for controlling a reverse-beating module (732) of the rock drilling machine (730), and the reverse-beating oil circuit (500) comprises a reverse-beating oil inlet circuit (510) and a reverse-beating oil return circuit (520);
the rotary oil way (200), the propelling oil way (300) and the impact oil way (400) are all connected with the main control valve group (100);
a propulsion control valve group (330) is arranged on the propulsion oil way (300), and the propulsion control valve group (330) is connected with the forward rotation oil way (210); an impact control valve group (430) is arranged on the impact oil inlet oil way (410), and the impact control valve group (430) is connected with the retreating oil way (320); and a reverse-beating control valve group (530) is arranged on the reverse-beating oil inlet oil way (510), and the reverse-beating control valve group (530) is connected with the retreating oil way (320).
2. The automatic control system of blast furnace hydraulic tapping machine as claimed in claim 1, wherein said propulsion control valve group (330) comprises a first valve block (331), a second valve block (332) and a third valve block (333);
the first valve block (331) comprises a first hydraulic control directional valve (3310) and a second hydraulic control directional valve (3311);
the second valve block (332) comprises a third hydraulic control reversing valve (3320), a fourth hydraulic control reversing valve (3321), a fifth hydraulic control reversing valve (3322), a one-way valve (3324) and a first overflow valve 3323;
the third valve block (333) includes a sixth pilot operated directional control valve (3330), a seventh pilot operated directional control valve (3331), and a manual directional control valve (3332).
3. The automatic control system of a blast furnace hydraulic tapping machine as claimed in claim 1, wherein said shock control valve block (430) comprises an eighth hydraulic control directional control valve (431), a ninth hydraulic control directional control valve (432), a first speed regulating valve (433) and a shuttle valve (434).
4. The automatic control system of blast furnace hydraulic tapping machine as claimed in claim 1, wherein said counter-acting control valve set (530) is a pilot operated directional control valve.
5. The automatic control system of the blast furnace hydraulic tapping machine as claimed in any one of claims 1-4, further comprising a buffer oil path (600), wherein the buffer oil path (600) is connected with the impact control valve set (430), and a buffer valve block (610) is arranged on the buffer oil path (600).
6. The automatic control system of blast furnace hydraulic tapping machine according to claim 5, characterized in that said cushion valve block (610) is a speed regulating valve.
7. The automatic control system of the blast furnace hydraulic tapping machine according to claim 6, wherein the control using the rotation pressure oil as the signal oil comprises:
when the rotary pressure is greater than a first set value, the rotary pressure signal oil changes the propelling speed of the propelling trolley by changing the opening of a propelling control valve group on the propelling loop, so as to prevent drill rod jamming;
when the rotation pressure is greater than a second set value, the rotation pressure signal oil controls to change the pushing direction by reversing a pushing control valve group on a pushing loop, so that the pushing trolley retreats to prevent drill rod clamping;
when the impact and propulsion are required to be forced, an operator can shield the control of the propulsion by cutting off the rotary pressure signal oil;
when the trolley is pushed forwards, the reverse beating oil way is cut off so as to shield the reverse beating function; when the trolley retreats, the reversing control valve set is reversed through a trolley propulsion motor retreating signal oil, the reversing function is activated, and the drill rod is prevented from being clamped.
8. The automatic control system of the blast furnace hydraulic tapping machine according to claim 7, wherein when the buffer pressure is lower than a third set value, the direction of the impact control valve group is changed to change the flow rate into the rock drilling machine, and the impact pressure is reduced to protect the rock drilling machine.
9. A blast furnace hydraulic tapping machine, characterized in that the blast furnace hydraulic tapping machine is automatically controlled by the automatic control system of the blast furnace hydraulic tapping machine according to any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210422268.9A CN114688112B (en) | 2022-04-21 | 2022-04-21 | Automatic control system of hydraulic tapping machine of blast furnace and hydraulic tapping machine of blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210422268.9A CN114688112B (en) | 2022-04-21 | 2022-04-21 | Automatic control system of hydraulic tapping machine of blast furnace and hydraulic tapping machine of blast furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114688112A true CN114688112A (en) | 2022-07-01 |
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| CN214465197U (en) * | 2021-03-24 | 2021-10-22 | 安百拓（南京）建筑矿山设备有限公司 | Control system for positioning large arm and supporting leg of drill jumbo and drill jumbo |
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| JPH10274204A (en) * | 1997-03-31 | 1998-10-13 | Hitachi Constr Mach Co Ltd | Inertial body driving gear |
| US20120085584A1 (en) * | 2009-06-26 | 2012-04-12 | Deyi Jiao | Control System, Rock Drill Rig And Control Method |
| US20130213026A1 (en) * | 2010-09-15 | 2013-08-22 | Kawasaki Jukogyo Kabushiki Kaisha | Drive control method of operating machine |
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