CN220319595U - Colliery hydraulic support stand protection liquid stream device with buffer function - Google Patents
Colliery hydraulic support stand protection liquid stream device with buffer function Download PDFInfo
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- CN220319595U CN220319595U CN202321745196.8U CN202321745196U CN220319595U CN 220319595 U CN220319595 U CN 220319595U CN 202321745196 U CN202321745196 U CN 202321745196U CN 220319595 U CN220319595 U CN 220319595U
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- 239000007788 liquid Substances 0.000 title claims abstract description 87
- 239000003245 coal Substances 0.000 claims abstract description 22
- 230000003139 buffering effect Effects 0.000 claims description 12
- 230000006378 damage Effects 0.000 abstract description 5
- 230000008093 supporting effect Effects 0.000 description 7
- 238000005065 mining Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000009295 sperm incapacitation Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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Abstract
The utility model provides a colliery hydraulic support stand protection liquid stream device with buffer function which characterized in that: comprising the following steps: the device comprises a liquid pump, a control valve, a first buffer structure, an upright post, a second buffer structure and an oil tank; the liquid pump is connected with one end of a first buffer structure through a control valve, the other end of the first buffer structure is connected with the lower cavity end of the upright post through a pipeline, the upper cavity end of the upright post is connected with one end of a second buffer structure through a pipeline, the other end of the second buffer structure is connected with the control valve through a pipeline, and the control valve is connected with an oil tank through a pipeline. According to the hydraulic support column liquid flow system, the buffer protection device is added in the hydraulic support column liquid flow system of the coal mine, so that damage to the hydraulic support on the working face due to liquid flow impact during working is reduced.
Description
Technical Field
The utility model relates to the technical field of underground comprehensive mining of coal mines, in particular to a liquid flow protection device for an upright post of a hydraulic support of a coal mine with a buffering function.
Background
Modern coal mine underground fully-mechanized mining face comprises three devices: the coal mining machine, the front scraper conveyor and the rear scraper conveyor and the hydraulic support are mainly used for supporting coal and rock strata on a working face, the hydraulic support guarantees normal operation of the coal mining machine and the front scraper conveyor and safety of operators, meanwhile, along with mining and pushing of coal bodies, the hydraulic support plays roles of pushing and pulling the front scraper conveyor and the rear scraper conveyor, and therefore normal operation of hydraulic support liquid on the working face is particularly important, and once the hydraulic support liquid is damaged, all equipment on the working face is stopped.
The power of the hydraulic support is derived from a high-pressure liquid supply system of the working surface. The liquid supply system mainly comprises an emulsion pump, an emulsion tank, a high-pressure liquid inlet and return pipeline and a series of valve groups. Only if the liquid supply system is circulated to continuously provide high-pressure liquid flow, the hydraulic support can realize the lifting, landing, advancing and extending and contracting of the front beam and the rear beam of the machine body. However, the liquid supply system can have special conditions of excessively high pressure or excessively low pressure in the moment during daily work, so that the hydraulic support is damaged due to the moment of impact or the hydraulic support is not enough in power to work.
The hydraulic support is damaged mainly by instantaneous high-pressure impact:
1. the welding seam of the hydraulic support structural member is cracked, the support body is distorted, and the whole supporting function is lost.
2. The hydraulic support sealing element, the pipe joint, the check ring and the valve seat are damaged to leak and run in, so that the hydraulic support is insufficient in supporting strength, and the supporting force is reduced and the control is failed.
3. The jack of the hydraulic support cannot be operated when damaged, and the protection, push-pull and coal discharging work of the front and rear scraper machines are lost.
4. The high-pressure rubber tube bursts, the liquid supply is interrupted, the hydraulic support stops working, and the high-pressure liquid impact injury event can occur.
5. The hydraulic pressure imbalance causes malfunction of hydraulic control elements or incapacitation of the upright post and the jack in the process of moving the frame.
Therefore, a hydraulic support upright post protection liquid flow device with a buffering function for a coal mine is expected to solve the problems in the prior art.
Disclosure of Invention
First, the technical problem to be solved
In view of the above-mentioned shortcomings and disadvantages of the prior art, the utility model provides a hydraulic support column protection liquid flow device with a buffering function for a coal mine, which solves the safety problem of failure of a hydraulic support caused by unstable hydraulic pressure of a liquid supply system.
(II) technical scheme
In order to achieve the above purpose, the hydraulic support column protection liquid flow device with buffering function for coal mine, which is adopted by the utility model, comprises: the device comprises a liquid pump, a control valve, a first buffer structure, an upright post, a second buffer structure and an oil tank; the liquid pump is connected with one end of a first buffer structure through a control valve, the other end of the first buffer structure is connected with the lower cavity end of the upright post through a pipeline, the upper cavity end of the upright post is connected with one end of a second buffer structure through a pipeline, the other end of the second buffer structure is connected with the control valve through a pipeline, and the control valve is connected with an oil tank through a pipeline.
According to the utility model, the first buffer structure and the second buffer structure are respectively added in the liquid inlet loop and the liquid return loop, so that the damage condition of the working face hydraulic support caused by liquid flow impact during working is reduced, and the safety problem faced by the working face hydraulic support in actual production is solved.
Preferably, the control valve is a three-position four-way valve, and the control valve comprises: the oil tank is connected with the oil return port O of the control valve through a pipeline.
Preferably, the first buffer structure includes: the first working oil port A of the control valve is connected with the liquid inlet of the first one-way buffer valve through a pipeline, and the liquid outlet of the first one-way buffer valve is connected with the lower cavity end of the upright post through a pipeline.
Preferably, the first buffer structure further includes: the first working oil port A of the control valve is also connected with a liquid outlet of the second one-way buffer valve through a pipeline, and a liquid inlet of the second one-way buffer valve is connected with the lower cavity end of the upright post through a pipeline.
Preferably, the opening pressure of the first one-way buffer valve is greater than the opening pressure of the second one-way buffer valve.
Preferably, the second buffer structure includes: the upper cavity end of the upright post is connected with a liquid inlet of the travel throttle valve through a pipeline, and a liquid outlet of the travel throttle valve is connected with a second working oil port B of the control valve through a pipeline.
Preferably, the second buffer structure further includes: the lower cavity end of the upright post is connected with the liquid outlet of the third one-way buffer valve through a pipeline, and the liquid inlet of the third one-way buffer valve is connected with the second working oil port B of the control valve through a pipeline.
(III) beneficial effects
According to the hydraulic support column liquid flow system, the buffer protection device is added in the hydraulic support column liquid flow system of the coal mine, so that damages to a cylinder body, a sealing element, various valve bodies and pipelines caused by liquid flow impact during working of the hydraulic support on a working face are reduced, liquid leakage and liquid leakage phenomena of the hydraulic support and a liquid supply system and reduction of supporting strength of the hydraulic support are further reduced, and the phenomenon that the support is pressed down due to the fact that the supporting strength of the hydraulic support is not kept up is avoided, and further cracking and difficult pulling and moving of welding seams of the support and normal operation and personnel safety of other equipment are further caused. The device has both improved hydraulic support's support intensity, provides powerful guarantee for the normal exploitation of colliery comprehensive exploitation working face is advanced, has ensured staff's operation safety and the normal operating of equipment, has avoided the damage of equipment main part and part again, has practiced thrift a large amount of material accessories, has reduced the fund input, and safety and benefit promote obviously.
Drawings
FIG. 1 is a schematic diagram of a coal mine hydraulic support column flow system;
fig. 2 is a schematic diagram of a hydraulic support column protection liquid flow device with a buffering function for a coal mine.
Detailed Description
The utility model will be better explained by the following detailed description of the embodiments with reference to the drawings.
In order that the above-described aspects may be better understood, exemplary embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.
The utility model will be described in detail with reference to fig. 1-2 of the accompanying drawings. The hydraulic support upright post protection liquid flow device with the buffering function for the coal mine comprises: the hydraulic pump 1, the control valve 2, the first buffer structure 3, the first one-way buffer valve 4, the second one-way buffer valve 5, the upright post 6, the second buffer structure 7, the stroke throttle valve 8, the third one-way buffer valve 9 and the oil tank 10; the first buffer structure 3 includes: the first one-way buffer valve 4 and the second one-way buffer valve 5, the second buffer structure 7 includes: a stroke throttle valve 8 and a third one-way trim valve 9.
The liquid pump 1 is connected with an oil inlet P of the control valve 2 through a pipeline, a first working oil port A of the control valve 2 is connected with a liquid inlet of the first one-way buffer valve 4 through a pipeline, a liquid outlet of the first one-way buffer valve 4 is connected with a left cavity end of the upright post 6 through a pipeline, a right cavity end of the upright post 6 is connected with a liquid inlet of the stroke throttle valve 8 through a pipeline, a liquid outlet of the stroke throttle valve 8 is connected with a second working oil port B of the control valve 2 through a pipeline, and an oil return port O of the control valve 2 is connected with the oil tank 10 through a pipeline.
In addition, the lower cavity end of the upright post 6 is also connected with the liquid inlet of the second one-way buffer valve 5 through a pipeline, and the liquid outlet of the second one-way buffer valve 5 is connected with the first working oil port A of the control valve 2 through a pipeline. The second working oil port B of the control valve 2 is also connected with the liquid inlet of the third one-way buffer valve 9 through a pipeline, and the liquid outlet of the third one-way buffer valve 9 is connected with the right cavity end of the upright post 6 through a pipeline.
When the control valve is in a left working state, after the high-pressure liquid output from the liquid pump 1 reaches the control valve 2, the opening pressure of the first one-way buffer valve 4 is set to be smaller than the opening pressure of the second one-way buffer valve 5, so that the single first one-way buffer valve 4 is preferentially opened, the high-pressure liquid enters the left cavity of the upright post of the hydraulic support through the first one-way buffer valve 4, when the upright post is horizontally placed, the left cavity of the upright post is an upright post lower cavity, the upright post piston rod is pushed to move upwards (the upright post is horizontally placed, the upright post piston rod moves upwards to the right), meanwhile, the stroke throttle valve 8 is triggered to be opened, liquid flow flows back to the oil tank 10, the liquid flow system completes a circulation of liquid inlet and return, and the hydraulic support is lifted, so that the supporting effect on the top plate is realized.
In the process of lifting the hydraulic support by feeding and returning liquid in the system, the hydraulic support is lifted slowly due to the high liquid flow pressure (the maximum upper limit is generally regulated to be 31.5 MPa), and the hydraulic support column 6 is subjected to instant high-pressure impact due to the blocking effect of the top plate pressure, so that the column 6 is damaged in sealing, a valve body, a pipeline and a cylinder body. Because the buffer protection loop 2 is additionally arranged in the system liquid return loop, when liquid flows through the point A, the third one-way buffer valve 9 is opened by high-pressure liquid flow, part of liquid flow flows back, the liquid flow pressure is reduced by reactive force, the impact force received by the upright post of the hydraulic support is reduced, and the buffer protection effect is achieved.
When the control valve 2 is in a right working state, after the high-pressure liquid output from the liquid pump 1 reaches the control valve 2, the liquid flow passes through the third one-way buffer valve 9 and then enters the right cavity (the upright 6 is horizontally arranged, so the right cavity of the upright 6 is an upper cavity) of the hydraulic support 6, the upright piston rod descends (the upright 2 is horizontally arranged, so the upright piston rod moves left to descend), and the liquid flow flows back to the oil tank 10 through the second one-way buffer valve 5, so that the hydraulic support descends.
In the descending process of the hydraulic support, the hydraulic support returns liquid faster and descends faster due to the pressure of crushing or collapsing the top plate, and the hydraulic support is damaged due to larger impact. The opening pressure set by the first buffer structure 3 is larger, so that the impact force received by the hydraulic support upright post 6 is reduced due to the larger reaction force, and the buffer protection effect is achieved.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, the present utility model should also include such modifications and variations provided that they come within the scope of the following claims and their equivalents.
Claims (7)
1. The utility model provides a colliery hydraulic support stand protection liquid stream device with buffer function which characterized in that: comprising the following steps: the device comprises a liquid pump, a control valve, a first buffer structure, an upright post, a second buffer structure and an oil tank; the liquid pump is connected with one end of a first buffer structure through a control valve, the other end of the first buffer structure is connected with the lower cavity end of the upright post through a pipeline, the upper cavity end of the upright post is connected with one end of a second buffer structure through a pipeline, the other end of the second buffer structure is connected with the control valve through a pipeline, and the control valve is connected with an oil tank through a pipeline.
2. The hydraulic support column protection liquid flow device with buffering function for coal mine, according to claim 1, wherein: the control valve is a three-position four-way valve, and the control valve comprises: the oil tank is connected with the oil return port O of the control valve through a pipeline.
3. The hydraulic support column protection liquid flow device with buffering function for coal mine, according to claim 2, wherein: the first buffer structure includes: the first working oil port A of the control valve is connected with the liquid inlet of the first one-way buffer valve through a pipeline, and the liquid outlet of the first one-way buffer valve is connected with the lower cavity end of the upright post through a pipeline.
4. The hydraulic support post protection flow device for coal mines with buffering function according to claim 3, wherein: the first buffer structure further includes: the first working oil port A of the control valve is also connected with a liquid outlet of the second one-way buffer valve through a pipeline, and a liquid inlet of the second one-way buffer valve is connected with the lower cavity end of the upright post through a pipeline.
5. The hydraulic support column protection liquid flow device with buffering function for coal mine, according to claim 4, wherein: the opening pressure of the first one-way buffer valve is larger than that of the second one-way buffer valve.
6. The hydraulic support column protection liquid flow device with buffering function for coal mine, according to claim 2, wherein: the second buffer structure includes: the upper cavity end of the upright post is connected with a liquid inlet of the travel throttle valve through a pipeline, and a liquid outlet of the travel throttle valve is connected with a second working oil port B of the control valve through a pipeline.
7. The hydraulic support column protection liquid flow device with buffering function for coal mine, according to claim 6, wherein: the second buffer structure further includes: the lower cavity end of the upright post is connected with the liquid outlet of the third one-way buffer valve through a pipeline, and the liquid inlet of the third one-way buffer valve is connected with the second working oil port B of the control valve through a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321745196.8U CN220319595U (en) | 2023-07-05 | 2023-07-05 | Colliery hydraulic support stand protection liquid stream device with buffer function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321745196.8U CN220319595U (en) | 2023-07-05 | 2023-07-05 | Colliery hydraulic support stand protection liquid stream device with buffer function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220319595U true CN220319595U (en) | 2024-01-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321745196.8U Active CN220319595U (en) | 2023-07-05 | 2023-07-05 | Colliery hydraulic support stand protection liquid stream device with buffer function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220319595U (en) |
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2023
- 2023-07-05 CN CN202321745196.8U patent/CN220319595U/en active Active
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