CN115492543A - Mining hydraulic remote control clean water pump station - Google Patents
Mining hydraulic remote control clean water pump station Download PDFInfo
- Publication number
- CN115492543A CN115492543A CN202211302320.3A CN202211302320A CN115492543A CN 115492543 A CN115492543 A CN 115492543A CN 202211302320 A CN202211302320 A CN 202211302320A CN 115492543 A CN115492543 A CN 115492543A
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- hydraulic
- water
- ball valve
- hydraulic control
- water tank
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 131
- 238000005065 mining Methods 0.000 title claims abstract description 20
- 239000002002 slurry Substances 0.000 claims abstract description 27
- 238000005553 drilling Methods 0.000 claims abstract description 12
- 239000003921 oil Substances 0.000 claims description 16
- 238000005192 partition Methods 0.000 claims description 7
- 239000010720 hydraulic oil Substances 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 3
- 239000003245 coal Substances 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
- E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
- E21B21/065—Separating solids from drilling fluids
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/10—Valve arrangements in drilling-fluid circulation systems
- E21B21/106—Valve arrangements outside the borehole, e.g. kelly valves
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/02—Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention belongs to the field of coal mine underground gas drainage equipment, and relates to a mining hydraulic remote control clean water pump station, which comprises a tracked vehicle, a motor, a slurry pump, a hydraulic pump, a water tank and an oil tank, wherein the motor, the slurry pump, the hydraulic pump, the water tank and the oil tank are arranged on the tracked vehicle; the hydraulic control ball valve is provided with a working port communicated with the drilling host and an internal circulation port communicated with the water tank through a rubber pipe, and water in the water tank is pumped out by a mud pump to enter the hydraulic control ball valve and is controlled to enter the working port or the internal circulation port; the invention solves the existing problems, can reduce the damage of the pulse generated by the hydraulic hammer to the slurry pump, does not need to frequently start the motor, and has high reliability.
Description
Technical Field
The invention belongs to the field of gas drainage equipment in a coal mine, and relates to a hydraulic remote control clean water pump station for a mine.
Background
The existing clean water pump station is mainly used for connecting a punching drill rod to punch a gas hole, and structurally comprises a crawler, a motor, a slurry pump, a hydraulic pump, a water tank and an oil tank. The working principle is as follows: the motor drives the slurry pump and the hydraulic pump, the slurry pump pumps out water in the water tank, and the pumped water enters the punching drill rod to punch holes in the gas pumping hole. The hydraulic pump provides power for the walking of the tracked vehicle.
The current clear water pump station's not enough lies in: (1) When the pump station provides power for the high-energy hydraulic hammer, the hydraulic hammer can generate pulses, and the pulses can cause serious damage to the slurry pump, so that the service life of the slurry pump is shortened; (2) The hydraulic control ball valve is not installed on a water path of a clean water pump station in the current market, and a motor is required to be shut down when a drill rod is additionally connected, so that the motor is frequently started, the service life of the motor is influenced, and the working efficiency is reduced; (3) The clear water pump station is not provided with a flowmeter, the water inlet flow cannot be determined, and the working state of the clear water pump station is inconvenient to control; (4) The system has no filtering system, the underground water quality is dirty, the drilling tool system is additionally abraded, and a special drilling tool cannot be used; (5) The clear water pump station is far away from the drilling machine host, and workers need to be assisted to frequently start and stop the pump station, so that labor is increased, and the working efficiency is reduced.
Disclosure of Invention
In view of this, the invention aims to provide a mining hydraulic remote control clean water pump station, which solves the existing problems, can reduce the damage of the pulse generated by a hydraulic hammer to a mud pump, does not need to frequently start a motor, and has high reliability.
In order to achieve the purpose, the invention provides the following technical scheme: a mining hydraulic remote control clear water pump station comprises a tracked vehicle, and a motor, a slurry pump, a hydraulic pump, a water tank and an oil tank which are arranged on the tracked vehicle, wherein the slurry pump is arranged at the front end of the motor, the hydraulic pump is connected in series at the front end of the slurry pump, the energy accumulator is connected at the rear end of the slurry pump, and a hydraulic control ball valve is also arranged between the slurry pump and the water tank; the hydraulic control ball valve is provided with a working port communicated with the drilling host machine and an internal circulation port communicated with the water tank through a rubber pipe, and water in the water tank is pumped out by a slurry pump to enter the hydraulic control ball valve so as to control the water to enter the working port or the internal circulation port.
Optionally, the tracked vehicle is further provided with a hydraulic control valve group for controlling the tracked vehicle to travel the multi-way valve and the hydraulic control ball valve, and the hydraulic control valve group is further communicated with a hydraulic control handle for controlling the hydraulic control ball valve.
Optionally, the hydraulic control ball valve is placed on the drill main body, connected with the hydraulic control valve group through the hydraulic rubber tube, and used for controlling the working state switching of the slurry pump station through the hydraulic control handle.
Optionally, the water inlet of the water tank is provided with a filter and a flow meter.
Optionally, two partition plates are welded in the water tank, water passing through the filter enters the first separation box, the water enters the second separation box after the first separation box is full of water, and finally enters the third separation box, and impurities are precipitated twice, so that underground water is purified.
Optionally, the height of the partition is lower than the height of the inside of the water tank.
Optionally, the water tank is further provided with an overflow port.
Optionally, the hydraulic control ball valve comprises a ball valve body, a rack and pinion structure used in cooperation with hydraulic oil is arranged at the upper end of the ball valve, a water inlet, a working port and an internal circulation port are respectively arranged at the lower end of the ball valve, and the ball valve is arranged between the working port and the internal circulation port and is matched with the rack and pinion structure; the two ends of the rack are respectively provided with an oil port A and an oil port B.
The invention has the beneficial effects that:
1) The mining hydraulic remote control clear water pump station uses the energy accumulator, so that the problem that the existing clear water pump station mud pump is frequently damaged is solved, the service life of the mud pump is greatly prolonged, and the reliability of the clear water pump station is ensured;
2) According to the mining hydraulic remote control clean water pump station, the water outlet is controlled by the hydraulic control ball valve, when a drill rod is additionally connected, the hydraulic control handle is operated to control the hydraulic control ball valve, water is transferred into the water tank to realize internal circulation, the water outlet is switched to the working interface after the drill rod is connected, the problem that the motor is frequently started is solved (the motor needs to be shut down when the drill rod is additionally connected in the existing pump station, and the motor is started after the drill rod is additionally connected is finished), the working efficiency is improved, and the service life of the motor is prolonged;
3) The mining hydraulic remote control clean water pump station is additionally provided with the low-pressure filter, the water tank is internally provided with the two-stage sedimentation structure, underground water is purified by multiple measures, and abrasion of a drilling tool and special equipment caused by water quality is also solved;
4) According to the mining hydraulic remote control clear water pump station, the hydraulic control handle is adopted to control the hydraulic control ball valve, workers can operate the water outlet direction of the clear water pump station on construction equipment, the constructors do not need to operate back and forth between the construction equipment and the clear water pump station, and labor intensity is greatly saved.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims thereof.
Drawings
For a better understanding of the objects, aspects and advantages of the present invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a front view of a hydraulic remote-control clear water pump station for mines according to the invention;
FIG. 2 is a top view of a hydraulic remote-control clear water pump station for mines according to the invention;
FIG. 3 is a schematic diagram of a water tank of a hydraulic remote control clear water pump station for a mine;
FIG. 4 is a front view of a hydraulic control ball valve of a mining hydraulic remote control clean water pump station of the invention;
FIG. 5 is a top view of a hydraulic control ball valve of a mining hydraulic remote control clean water pump station.
Reference numerals: the hydraulic control hydraulic pump comprises a hydraulic pump 1, a mud pump 2, an oil tank 3, an energy accumulator 4, a hydraulic control ball valve 5, a motor 6, a water tank 7, a filter 8, an electromagnetic starter 9, a flowmeter 10, a hydraulic control handle 11, a walking multi-way valve 12, a crawler 13, a hydraulic control valve group 14, a partition plate 15, an oil port A16, an oil port B17, a hydraulic control ball valve water inlet 18, a working port 19, an internal circulation port 20, a gear 21 and a rack 22.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustration only and not for the purpose of limiting the invention, shown in the drawings are schematic representations and not in the form of actual drawings; for a better explanation of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present invention, and the specific meaning of the terms described above will be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1 to 5, the mining hydraulic remote-control clean water pump station comprises a tracked vehicle 13, and a motor 6, a slurry pump 2, a hydraulic pump 1, a water tank 7 and an oil tank 3 which are arranged on the tracked vehicle 13, wherein the slurry pump 2 is arranged at the front end of the motor 6, the hydraulic pump 1 which provides power for the tracked vehicle 13 to walk and the hydraulic control ball valve 5 is connected in series at the front end of the slurry pump 2, the energy accumulator 4 is connected at the rear end of the hydraulic pump, and the hydraulic control ball valve 5 is also arranged between the slurry pump 2 and the water tank 7; the hydraulic control ball valve 5 is provided with a working port 19 communicated with a drilling host machine and an internal circulation port 20 communicated with a water tank 7 through a rubber tube, water in the water tank 7 is pumped out by a mud pump 2 and enters the hydraulic control ball valve 5 to control the water to enter the working port 19 or enter the internal circulation port 20, a multi-way valve 12 for controlling the crawler 13 to walk and a hydraulic control valve group 14 for controlling the hydraulic control ball valve 5 are further arranged on the crawler 13, the hydraulic control valve group 14 is also communicated with a hydraulic control handle 11 for controlling the hydraulic control ball valve 5, the hydraulic control ball valve 5 is placed on the drilling host machine body and is connected with the hydraulic control valve group 14 through the hydraulic rubber tube, a machine captain controls the working state switching of the mud pump 2 through the hydraulic control handle 11, a filter 8 and a flowmeter 10 are arranged at a water inlet of the water tank 7, two partition plates 15 are welded in the water tank 7, water passing through the filter 8 enters a first compartment, the water enters a second compartment after the first compartment is full of water, the water finally enters a third compartment, impurities are precipitated twice to purify the water coming from the underground, the height of the partition plates 15 is lower than the height of the interior of the water tank 7, an overflow port is further formed in the water tank 7, the hydraulic control ball valve 5 comprises a ball valve body, a gear 21 and rack 22 structure matched with hydraulic oil is arranged at the upper end of the ball valve, a hydraulic control ball valve water inlet 18, a working port 19 and an internal circulation port 20 are respectively arranged at the lower end of the ball valve, and the ball valve is arranged between the working port 19 and the internal circulation port 20 and is matched with the gear 21 structure; the two ends of the rack 22 are respectively provided with an oil port A16 and an oil port B17, when hydraulic oil enters the oil port A16 or the oil port B17 of the hydraulic control ball valve 5, the rack 22 is pushed to drive the gear 21 to rotate, the gear 21 rotates to drive the ball valve to rotate, and the ball valve rotates to change the direction of a water outlet of the ball valve.
In this embodiment, an electromagnetic actuator 9 for connecting an external power supply is further mounted on the water tank 7.
In the embodiment, sewage enters the filter 8 through the flowmeter 10, filtered clean water enters the water tank 7 (when the water inflow is large, redundant water flows out from an overflow port), water entering the water tank 7 is pumped out by the slurry pump 2 and enters the hydraulic control ball valve 5, and the hydraulic control ball valve 5 controls whether water enters the working port 19 or the internal circulation port 20 (the internal circulation port 20 is communicated with the water tank 7 through a rubber pipe); the energy accumulator 4 is arranged on the other side of the water outlet of the mud pump 2, when the hydraulic hammer generates pulse vibration, the energy accumulator 4 eliminates the pulse vibration generated by the hydraulic hammer, the service life of the mud pump 2 is prolonged, and meanwhile, the stable-pressure high-pressure water flow is guaranteed to be provided for the hydraulic hammer.
In this embodiment, the hydraulic oil from the hydraulic pump 1 is divided into two paths, one path provides walking power for the tracked vehicle 13, the other path provides power for the hydraulic control ball valve 5 and the hydraulic control handle 11, the hydraulic control handle 11 controls the hydraulic control ball valve 5 through the hydraulic control valve set 14, and when the hydraulic control handle 11 is shifted, the water outlet of the hydraulic control ball valve 5 is changed accordingly.
The clear water station adopts the design of adding the hydraulic ball valve on the water outlet pipeline, when a drill rod is additionally connected, the ball valve control handle is shifted, so that the outlet water pumped by the slurry pump 2 enters the water tank 7, the drill rod is conveniently additionally connected, and the problem that the motor 6 is frequently started (when the drill rod is additionally connected, the motor 6 needs to be shut down, the drill rod is connected and the motor 6 is started again) is solved; the clean water pump station adopts the design that the flowmeter 10 is arranged at the water inlet, so that an operator can intuitively know the water inflow of the pump station, and the working efficiency is improved; the low-pressure filter 8 is additionally arranged at the water inlet of the clean water pump station, and the filter 8 has the advantages of higher filtering and washing speeds and solving the problem that water quality abrades drilling tools and special equipment; the clean water pump station adopts the hydraulic control handle 11 to control the hydraulic ball valve, the oil pipe of the hydraulic control handle 11 can be lengthened according to the actual situation on site, and the problem that a worker frequently starts and stops the motor 6 between the drilling machine and the clean water pump station is solved.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (8)
1. The utility model provides a clear water pump station is far controlled to mining hydraulic pressure, includes the tracked vehicle to and set up motor, slush pump, hydraulic pump, water tank and the oil tank on the tracked vehicle, its characterized in that: the front end of the motor is arranged in a slurry pump, the front end of the slurry pump is connected in series to form a hydraulic pump, the rear end of the slurry pump is connected with an energy accumulator, and a hydraulic control ball valve is arranged between the slurry pump and the water tank;
the hydraulic control ball valve is provided with a working port communicated with the drilling host machine and an internal circulation port communicated with the water tank through a rubber pipe, and water in the water tank is pumped out by a slurry pump to enter the hydraulic control ball valve so as to control the water to enter the working port or the internal circulation port.
2. The mining hydraulic remote control clean water pump station according to claim 1, characterized in that: the crawler is also provided with a hydraulic control valve group for controlling the crawler to walk the multi-way valve and the hydraulic control ball valve, and the hydraulic control valve group is also communicated with a hydraulic control handle for controlling the hydraulic control ball valve.
3. The mining hydraulic remote control clean water pump station according to claim 2, characterized in that: the hydraulic control ball valve is placed on the main body of the drilling machine, is connected with the hydraulic control valve group through a hydraulic rubber pipe, and controls the working state switching of the slurry pump station through a hydraulic control handle.
4. The mining hydraulic remote control clean water pump station according to claim 1, characterized in that: the water inlet of the water tank is provided with a filter and a flowmeter.
5. The mining hydraulic remote control clean water pump station according to claim 4, characterized in that: two partition plates are welded inside the water tank, water passing through the filter enters the first compartment, the water enters the second compartment after the first compartment is full of water, and finally enters the third compartment, and impurities are precipitated twice, so that underground water is purified.
6. The mining hydraulic remote control clean water pump station according to claim 5, characterized in that: the height of the partition plate is lower than the height of the inside of the water tank.
7. The mining hydraulic remote-control clear water pump station according to claim 5, characterized in that: the water tank is also provided with an overflow port.
8. The mining hydraulic remote control clean water pump station according to claim 1, characterized in that: the hydraulic control ball valve comprises a ball valve body, the upper end of the ball valve is provided with a gear rack structure matched with hydraulic oil for use, the lower end of the ball valve is respectively provided with a water inlet, a working port and an internal circulation port, and the ball valve is arranged between the working port and the internal circulation port and matched with the gear structure;
both ends of the rack are respectively provided with an oil port A and an oil port B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211302320.3A CN115492543A (en) | 2022-10-24 | 2022-10-24 | Mining hydraulic remote control clean water pump station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211302320.3A CN115492543A (en) | 2022-10-24 | 2022-10-24 | Mining hydraulic remote control clean water pump station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115492543A true CN115492543A (en) | 2022-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211302320.3A Pending CN115492543A (en) | 2022-10-24 | 2022-10-24 | Mining hydraulic remote control clean water pump station |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU117990U1 (en) * | 2012-03-22 | 2012-07-10 | Общество с ограниченной ответственностью "ПРОСТОР" | HYDRAULIC PUMPING STATION |
| CN103321627A (en) * | 2013-07-04 | 2013-09-25 | 中国石油大学(华东) | Fracturing pulse sand filling system with ultrahigh flow conductivity and method for operating fracturing pulse sand filling system |
| CN111119734A (en) * | 2020-01-22 | 2020-05-08 | 阳泉煤业（集团）股份有限公司 | Coal mine through-layer downward drilling and expanding integrated complete equipment |
| CN211368870U (en) * | 2019-12-19 | 2020-08-28 | 贵州豫能投资有限公司 | Crawler-type high-pressure clean water pump station for coal mine |
| RU212792U1 (en) * | 2022-03-10 | 2022-08-08 | федеральное государственное бюджетное образовательное учреждение высшего образования "Кузбасский государственный технический университет имени Т.Ф. Горбачева" (КузГТУ) | Pumping station |
| CN217582227U (en) * | 2022-03-31 | 2022-10-14 | 国家能源集团乌海能源有限责任公司 | Circulating water tank |
| CN218150828U (en) * | 2022-10-24 | 2022-12-27 | 中煤科工集团重庆研究院有限公司 | Mining hydraulic remote control clean water pump station |
-
2022
- 2022-10-24 CN CN202211302320.3A patent/CN115492543A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU117990U1 (en) * | 2012-03-22 | 2012-07-10 | Общество с ограниченной ответственностью "ПРОСТОР" | HYDRAULIC PUMPING STATION |
| CN103321627A (en) * | 2013-07-04 | 2013-09-25 | 中国石油大学(华东) | Fracturing pulse sand filling system with ultrahigh flow conductivity and method for operating fracturing pulse sand filling system |
| CN211368870U (en) * | 2019-12-19 | 2020-08-28 | 贵州豫能投资有限公司 | Crawler-type high-pressure clean water pump station for coal mine |
| CN111119734A (en) * | 2020-01-22 | 2020-05-08 | 阳泉煤业（集团）股份有限公司 | Coal mine through-layer downward drilling and expanding integrated complete equipment |
| RU212792U1 (en) * | 2022-03-10 | 2022-08-08 | федеральное государственное бюджетное образовательное учреждение высшего образования "Кузбасский государственный технический университет имени Т.Ф. Горбачева" (КузГТУ) | Pumping station |
| CN217582227U (en) * | 2022-03-31 | 2022-10-14 | 国家能源集团乌海能源有限责任公司 | Circulating water tank |
| CN218150828U (en) * | 2022-10-24 | 2022-12-27 | 中煤科工集团重庆研究院有限公司 | Mining hydraulic remote control clean water pump station |
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| Title |
|---|
| 赵光霞 等: "《液压与气压传动技术》", 北京理工大学出版社, pages: 66 - 67 * |
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Application publication date: 20221220 |