CN112460010B - Mining vehicle-mounted mobile emulsion pump station system and control method - Google Patents
Mining vehicle-mounted mobile emulsion pump station system and control method Download PDFInfo
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- CN112460010B CN112460010B CN202011089889.7A CN202011089889A CN112460010B CN 112460010 B CN112460010 B CN 112460010B CN 202011089889 A CN202011089889 A CN 202011089889A CN 112460010 B CN112460010 B CN 112460010B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
- E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
- E21D15/45—Hydraulic, pneumatic, or hydraulic-pneumatic props having closed fluid system, e.g. with built-in pumps or accumulators
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
- F04B49/24—Bypassing
Abstract
The invention belongs to the technical field of coal mine underground emulsion pump station supply systems, and particularly relates to a mining vehicle-mounted mobile emulsion pump station system and a control method. The hydraulic pump and the hydraulic oil tank are fixed at the front end of the whole vehicle chassis, the function switching valve, the emulsion control multi-way valve, the safety valve and the pressure limiting valve are installed and fixed on the middle modularized platform of the whole vehicle, and the emulsion tank and the emulsion filter are installed and fixed at the rear end of the whole vehicle chassis. The invention adopts the vehicle-mounted emulsion pump station system to conveniently and rapidly provide high-pressure emulsion for the bracket at any time and any place, changes the traditional mode that the pipeline of the underground emulsion pump station depends on manual traction, and reduces the labor intensity of operators.
Description
Technical Field
The invention belongs to the technical field of coal mine underground emulsion pump station supply systems, and particularly relates to a mining vehicle-mounted mobile emulsion pump station system and a control method.
Background
The coal mine safety regulations prescribe that: the support must be reinforced within the influence range of the advance pressure at the connection of all the safety outlets of the coal face and the roadway, and the length of the reinforced support roadway must not be less than 20 m. The advanced support not only effectively prevents the roof fall accident of the advanced support section of the roadway and improves the safety of personnel operation, but also can accelerate the propelling speed of the working face and realize the safe and efficient production of the working face. The single column support with small volume, convenient maintenance and low comprehensive cost and the advanced hydraulic support process with high mechanization and automation level and high support strength are rapidly developed into main stream products of underground advanced support of coal mines in China, and the prior advanced support process of coal mine roadways mainly uses hydraulic single columns or advanced hydraulic supports as support main bodies.
The emulsion has the advantages of low pollution, low cost, common preparation raw materials, simple method and the like, and is widely used as a preferred power transmission medium for a fully-mechanized mining face hydraulic support and an advanced support hydraulic support in a coal mine. During normal operation, the advance support moves continuously and sequentially along with the pushing of the working face, so that a large amount of high-pressure emulsion is required to be provided in the pushing process of the advance support, and the working requirement of the support is met. At present, the existing emulsion pump station systems of the coal mine are all electric drive fixed emulsion pump stations, and the following problems exist in the underground use process of the coal mine: (1) The pump station has large volume and heavy weight, adopts fixed installation and has poor mobility; (2) The explosion-proof motor is used for driving, and a plurality of devices such as a professional frequency converter, overload protection and the like are required to be equipped, so that the system is complex, the cost is high, the failure rate is high, and the maintenance technical difficulty is high; (3) The pump station pipeline long distance movement relies on the manual work to drag, and working strength is big. In conclusion, objective factors lead to high labor intensity in the existing advanced support process of the coal mine, low support efficiency and high installation operation risk, and seriously restrict the high yield and high efficiency of the fully-mechanized coal face of the coal mine.
Disclosure of Invention
The invention aims to solve the problems and provides a mining vehicle-mounted mobile emulsion pump station system and a control method.
The invention adopts the following technical scheme: a mining vehicle-mounted mobile emulsion pump station system comprises a hydraulic pump and a hydraulic oil tank which are fixed at the front end of a whole vehicle chassis, a function switching valve, an emulsion control multi-way valve, a safety valve and a pressure limiting valve which are installed and fixed on a middle modularized platform of the whole vehicle, and an emulsion tank and an emulsion filter which are installed and fixed at the rear end of the whole vehicle chassis, wherein an oil suction port S of the hydraulic pump and an oil return L of a shell body are arranged 1 Port, overflow return oil L 2 The ports are respectively connected with a hydraulic oil tank, and the variable control oil port X of the hydraulic pump 1 And variable control oil port X 2 Respectively connected with external control oil, a working oil port A, a working oil port B and an oil supplementing pressure oil outlet M of the hydraulic pump 3 Respectively connected with the function switching valve; the oil return port of the function switching valve is connected with the hydraulic oil tank, the function switching valve is provided with four output working oil ports, two of the four output working oil ports are connected with the power oil port of the vehicle-mounted emulsion pump, the safety valve is connected in parallel with the power oil port of the emulsion pump, and the other two of the safety valves are connected with other work structures of the whole vehicle; emulsion pump inlet and emulsionThe liquid tank is connected, and the working liquid port of the emulsion pump is respectively connected with the liquid inlet of the emulsion control multi-way valve and the liquid inlet of the pressure limiting valve; the working port of the emulsion control multi-way valve is directly connected with the liquid inlet of the bracket, and the liquid return port of the emulsion control multi-way valve and the liquid outlet of the pressure limiting valve are respectively connected with the emulsion tank.
The function switching valve comprises a manual reversing valve, a hydraulic reversing valve I and a hydraulic reversing valve II, and is provided with an X port, a T port and an oil inlet A 1 Oil inlet B 1 Oil port A 2 Oil port B 2 Oil port A 3 Working oil port B 3 Function switching valve X port and oil supplementing pressure oil outlet M of hydraulic pump 3 The T port is connected with the hydraulic oil tank, and the oil inlet A 1 Oil inlet B 1 Is connected with a hydraulic pump working oil port, and a function switching valve working oil port A 2 Oil port B 2 Working oil port A 3 Oil port B 3 The hydraulic control reversing valve is respectively connected with an emulsion pump oil inlet and oil inlets of other functional systems of the whole vehicle, a working port of the manual reversing valve is simultaneously communicated with a hydraulic control cavity of the hydraulic control reversing valve I and a hydraulic control cavity of the hydraulic control reversing valve II, an oil inlet of the manual reversing valve is an X port, an oil return port of the manual reversing valve is a T port, and two working ports of the hydraulic control reversing valve I are respectively a working port A 2 And a working oil port A 3 The oil inlet of the hydraulic control reversing valve I is an oil inlet A 1 The two working oil ports of the hydraulic control reversing valve II are respectively a working oil port B 2 And a working oil port B 3 The oil inlet of the control reversing valve II is an oil inlet B 1 。
When the system is required to output high-pressure emulsion, the working method of the mining vehicle-mounted mobile emulsion pump station system is that a reversing handle of a manual reversing valve on a function switching valve is shifted, hydraulic pump oil supplementing pressure oil enters the switching valve through an X port, enters a hydraulic control end of a hydraulic control reversing valve through a valve core of the manual reversing valve, the hydraulic control reversing valve I and the hydraulic control reversing valve II are reversed under the action of the pressure oil, and an oil inlet A of the function switching valve 1 And oil inlet B 1 Two working ports A of the internal oil duct of the pilot operated directional control valve and the function switching valve 3 And working port B 3 Is connected with the working ports A and B of the hydraulic pump through the returnWorking port A of road-to-function switching valve 3 And working port B 3 Function switching valve working port A 3 And working port B 3 Is connected with an emulsion pump oil inlet, so that the hydraulic pump drives the emulsion pump to work to output high-pressure emulsion for the working requirement of the support bracket.
When other functions of the vehicle are required to work, a reversing handle of a manual reversing valve on the function switching valve is shifted, the manual reversing valve is in a right position function, at the moment, an oil way of a control oil port X is cut off, hydraulic control ends of a hydraulic control reversing valve I and a hydraulic control reversing valve II are communicated with a T port through a right position oil way of the reversing valve, control oil flows back to the oil tank through the loop, the hydraulic control reversing valve I and the hydraulic control reversing valve II are reversed under the action of spring force, and a function switching valve working port A is formed by shifting the hydraulic control reversing valve I and the hydraulic control reversing valve II 3 Work port B 3 With oil inlet A 1 Oil inlet B 1 Is cut off, working port A 2 Work port B 2 With oil inlet A 1 Oil inlet B 1 The oil passage of the hydraulic pump is communicated, and the working oil port A and the working oil port B of the hydraulic pump reach the working port A of the switching valve through the loop 2 Work port B 2 Work port A 3 Work port B 3 Is connected with oil inlets of other functional systems of the vehicle, so that the hydraulic pump drives the other functional systems of the vehicle to work.
Compared with the prior art, the invention adopts the vehicle-mounted emulsion pump station system to conveniently and rapidly provide high-pressure emulsion for the bracket at any time and any place, changes the traditional mode that the pipeline of the underground emulsion pump station depends on manual traction, reduces the labor intensity of operators, achieves the aims of reducing the personnel in underground operation and simultaneously doubling the supporting efficiency.
Drawings
FIG. 1 is a schematic diagram of a vehicle-mounted mobile mining emulsion pump station system of the present invention;
FIG. 2 is a linkage layout of the present invention with a finished vehicle;
FIG. 3 is a bottom view of FIG. 2;
FIG. 4 is a schematic diagram of a function switching valve;
in the figure, a 1-hydraulic pump, a 2-function switching valve, a 3-safety valve, a 4-emulsion control multi-way valve, a 5-pressure limiting valve, a 6-emulsion tank, a 7-emulsion filter, an 8-vehicle-mounted emulsion pump, a 9-hydraulic oil tank, a 10-hydraulic filter, an 11-manual reversing valve, a 12-hydraulic reversing valve and a 13-hydraulic reversing valve are arranged.
Detailed Description
The present invention will be described in detail with reference to the following drawings.
As shown in fig. 2, the hydraulic pump 1 and the hydraulic oil tank 9 are fixed at the front end of the chassis of the whole vehicle, the function switching valve 2, the emulsion control multi-way valve 4, the safety valves 3 and 5 and the vehicle-mounted emulsion pump 8 are installed and fixed on a modularized platform in the middle of the whole vehicle, the platform can be integrally disassembled, and the emulsion tank 6 and the emulsion filter 7 are installed and fixed at the rear end of the chassis of the whole vehicle. Through platform modularized design, emulsion pump station system assembly is carried on the transport vehicle as a whole, when the place of work is far away, need not artifical long distance shoulder, drag emulsion pipeline and remove, only need drive the transport vehicle to the place that needs work, start on-vehicle emulsion pump station system and can export high-pressure emulsion, improved work efficiency when reducing personnel intensity of labour.
As shown in fig. 1, the oil suction port S of the hydraulic pump 1 and the casing return oil L 1 Port, overflow return oil L 2 The ports are respectively connected with a hydraulic oil tank 9, and the variable control oil port X of the hydraulic pump 1 1 And variable control oil port X 2 Respectively connected with external control oil, a working oil port A, a working oil port B and an oil supplementing pressure oil outlet M of the hydraulic pump 3 Respectively connected with the function switching valve 2; the oil return port of the function switching valve 2 is connected with the hydraulic oil tank 9, the function switching valve 2 has four output working oil ports, two of the four output working oil ports are connected with the power oil ports of the vehicle-mounted emulsion pump, and the other two of the four output working oil ports are connected with other work structures of the whole vehicle; the liquid inlet of the emulsion pump is connected with an emulsion tank 6, and the liquid inlet of the emulsion pump is respectively connected with the liquid inlets of the emulsion control multi-way valve 4 and the pressure limiting valve 5; the working port of the emulsion control multi-way valve 4 is directly connected with the liquid inlet of the bracket, and the liquid return port of the emulsion control multi-way valve 4 and the liquid outlet of the pressure limiting valve 5 are respectively connected with the emulsion tank 6.
As shown in fig. 4, the function switching valve 2 comprises a manual reversing valve 11, a hydraulic reversing valve I12 and a hydraulic reversing valve II13, and an X port, a T port and an oil inlet are arranged on the function switching valve 2Port A 1 Oil inlet B 1 Oil port A 2 Oil port B 2 Oil port A 3 Working oil port B 3 Function switching valve X port and oil supplementing pressure oil outlet M of hydraulic pump 1 3 The T port is connected with the hydraulic oil tank, and the oil inlet A 1 Oil inlet B 1 Is connected with a working oil port of the hydraulic pump 1, and a working oil port A of the function switching valve 2 2 Oil port B 2 Working oil port A 3 Oil port B 3 The hydraulic oil return port of the manual reversing valve 11 is a T port, and two working ports of the hydraulic reversing valve I12 are respectively a working port A 2 And a working oil port A 3 The oil inlet of the hydraulic control reversing valve I12 is an oil inlet A 1 The two working oil ports of the hydraulic control reversing valve II13 are respectively a working oil port B 2 And a working oil port B 3 The oil inlet of the control reversing valve II13 is an oil inlet B 1 . The function switching valve 2 is used for switching the hydraulic circuit to select an emulsion pump station system or a vehicle function hydraulic system. The manual reversing valve is a two-position three-way valve and is used for controlling the direction of the pilot oil; the pilot operated directional control valve I, II is a hydraulic pilot operated valve, one end of the pilot operated valve is a pilot operated control cavity, the other end of the pilot operated valve is a return spring, and the control function switching valve outputs high-pressure oil direction. The pilot oil is selectively introduced into the pilot control cavity of the pilot control reversing valve I or the pilot control cavity of the pilot control reversing valve II through the action of operating the manual reversing valve, and the pilot control reversing valve is controlled to reverse, so that the function switching valve is controlled to output the high-pressure oil direction.
When the system is required to output high-pressure emulsion, a reversing handle of a manual reversing valve 11 on the function switching valve 2 is shifted, hydraulic pump oil supplementing pressure oil enters the switching valve through an X port, enters a hydraulic control reversing valve hydraulic control end through a valve core of the manual reversing valve 11, the hydraulic control reversing valve I12 and the hydraulic control reversing valve II13 are reversed under the action of the pressure oil, and an oil inlet A of the switching valve 2 1 And oil inlet B 1 Two working ports A of the internal oil duct of the pilot operated directional control valve and the switching valve 2 3 And working port B 3 On, hydraulic pumpThe working ports A and B of the switching valve 2 pass through the loop to reach the working port A of the switching valve 1 3 And working port B 3 Working port A of switching valve 2 3 And working port B 3 Is connected with an emulsion pump oil inlet, so that the hydraulic pump 1 drives the emulsion pump to work and output high-pressure emulsion for the working requirement of the support bracket.
When other functions of the vehicle are required to work, a reversing handle of the manual reversing valve 11 on the function switching valve 2 is shifted, the manual reversing valve 11 is in a right position function, at the moment, an oil way of the control oil port X is cut off, the hydraulic control ends of the hydraulic control reversing valve I12 and the hydraulic control reversing valve II13 are communicated with a T port through the right position oil way of the reversing valve 11, control oil flows back to an oil tank through the circuit, the hydraulic control reversing valve I12 and the hydraulic control reversing valve II13 are reversed under the action of spring force, and the working port A of the function switching valve 2 is provided with 3 Work port B 3 With oil inlet A 1 Oil inlet B 1 Is cut off, working port A 2 Work port B 2 With oil inlet A 1 Oil inlet B 1 Through which the working ports a and B of the hydraulic pump 1 reach the working port a of the switching valve 2 2 Work port B 2 Work port A 3 Work port B 3 Is connected with oil inlets of other functional systems of the vehicle, so that the hydraulic pump 1 drives the other functional systems of the vehicle to work.
The present invention is not limited to the above-described embodiments, and those skilled in the relevant art can make technical modifications thereto without departing from the scope of the basic technical idea of the present invention, and the modifications are intended to fall within the scope of the claims of the present invention.
Claims (1)
1. The utility model provides a mining on-vehicle portable emulsion pump station system which characterized in that: the hydraulic pump (1) and the hydraulic oil tank (9) are fixed at the front end of the whole vehicle chassis, the function switching valve (2), the emulsion control multi-way valve (4), the safety valve (3) and the pressure limiting valve (5) are installed and fixed on a middle modularized platform of the whole vehicle, the emulsion tank (6) and the emulsion filter (7) are installed and fixed at the rear end of the whole vehicle chassis, an oil suction port S, a shell oil return port L1 and an overflow oil return port L2 of the hydraulic pump (1) are respectively connected with the hydraulic oil tank (9), a variable control oil port X1 and a variable control oil port X2 of the hydraulic pump (1) are respectively connected with external control oil, and a working oil port A, a working oil port B and an oil supplementing pressure oil outlet M3 of the hydraulic pump are respectively connected with the function switching valve (2); the oil return port of the function switching valve (2) is connected with the hydraulic oil tank (9), the function switching valve (2) is provided with four output working oil ports, two of the four output working oil ports are connected with the power oil ports of the vehicle-mounted emulsion pump, meanwhile, the safety valve (3) is connected between the power oil ports of the emulsion pump in parallel, and the other two of the safety valves are connected with other functional structures of the whole vehicle; the liquid inlet of the emulsion pump is connected with an emulsion tank (6), and the liquid inlet of the emulsion pump is respectively connected with the liquid inlet of the emulsion control multi-way valve (4) and the pressure limiting valve (5); the working port of the emulsion control multi-way valve (4) is directly connected with the liquid inlet of the bracket, and the liquid return port of the emulsion control multi-way valve (4) and the liquid outlet of the pressure limiting valve (5) are respectively connected with the emulsion tank (6);
the function switching valve (2) comprises a manual reversing valve (11), a hydraulic reversing valve I (12) and a hydraulic reversing valve II (13), wherein an X port, a T port, an oil inlet A1, an oil inlet B1, a working oil port A2, a working oil port B2, a working oil port A3 and a working oil port B3 are arranged on the function switching valve (2), the X port of the function switching valve is connected with an oil supplementing pressure oil outlet M3 of the hydraulic pump (1), the T port is connected with a hydraulic oil tank, the oil inlet A1 and the oil inlet B1 are connected with a working oil port of the hydraulic pump (1), the working oil port A2, the working oil port B2 and the working oil port A3 of the function switching valve (2) are respectively connected with an oil inlet of an emulsion pump and an oil inlet of other functional system of the whole automobile, the working port A2 and the working oil port B3 of the hydraulic reversing valve II (13) are simultaneously communicated with a hydraulic control cavity of the hydraulic reversing valve I (12) and the hydraulic reversing valve II (13), the oil inlets of the manual reversing valve (11) are the X port, the oil inlets of the two working oil ports of the manual reversing valve I (11) are respectively the working oil ports A2 and the two working oil ports A2 and the working oil ports B3 of the hydraulic reversing valve II (13) are respectively;
a working method of a mining vehicle-mounted mobile emulsion pump station system,
when the system is required to output high-pressure emulsion, a reversing handle of a manual reversing valve (11) on a function switching valve (2) is shifted, hydraulic pump oil supplementing pressure oil enters the function switching valve (2) through an X port, and enters a hydraulic control end of the hydraulic control reversing valve through a valve core of the manual reversing valve (11), the hydraulic control reversing valve I (12) and the hydraulic control reversing valve II (13) are reversed under the action of the pressure oil, an oil inlet A1 and an oil inlet B1 of the function switching valve (2) are communicated with two working oil ports A3 and B3 of the function switching valve (2) through oil channels in the hydraulic control reversing valve, the working oil ports A and B of the hydraulic pump (1) reach the working oil port A3 and the working oil port B3 of the function switching valve (2) through the loop, and the working oil port A3 and the working oil port B3 of the function switching valve (2) are connected with an emulsion pump oil inlet, so that the hydraulic pump (1) drives the emulsion pump to work to output high-pressure emulsion to support the working requirement;
when other functions of the vehicle are required to work, a reversing handle of the manual reversing valve (11) on the function switching valve (2) is shifted, the manual reversing valve (11) is in a right-position function, at the moment, an oil way of an X port is cut off, hydraulic control ends of the hydraulic control reversing valve I (12) and the hydraulic control reversing valve II (13) are communicated with the T port through the right-position oil way of the manual reversing valve (11), control oil flows back to an oil tank through the loop, the hydraulic control reversing valve I (12) and the hydraulic control reversing valve II (13) are reversed under the action of spring force, an oil way of the hydraulic control reversing valve (2) is cut off, the working oil port A3, the working oil port B3, the oil inlet A1 and the oil way of the oil inlet B1, the working oil port A2, the oil way of the working oil port B2 are communicated with the oil inlet A1 and the oil way of the oil inlet B1, the working oil port A2 and the working oil port B of the hydraulic pump (1) reach the working oil port A2 and the working oil port B2 of the function switching valve (2) through the loop, the working oil port A2 and the working oil port B2 are connected with other function systems of the vehicle, and the hydraulic pump (1) drives other function systems of the vehicle to work.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011089889.7A CN112460010B (en) | 2020-10-13 | 2020-10-13 | Mining vehicle-mounted mobile emulsion pump station system and control method |
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| CN202011089889.7A CN112460010B (en) | 2020-10-13 | 2020-10-13 | Mining vehicle-mounted mobile emulsion pump station system and control method |
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| CN112460010B true CN112460010B (en) | 2023-06-09 |
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| CN113339025A (en) * | 2021-06-04 | 2021-09-03 | 煤炭科学研究总院 | Hydraulic system and hydraulic support group |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3715060B2 (en) * | 1997-02-26 | 2005-11-09 | 日立建機株式会社 | Hydraulic pump cut-off device |
| DE102007007005B4 (en) * | 2007-02-08 | 2021-12-02 | Robert Bosch Gmbh | Electro-hydraulic control arrangement |
| CN102501758B (en) * | 2011-11-07 | 2014-05-28 | 中国煤炭科工集团太原研究院 | Fully-hydraulically-driven travelling system for underground trackless rubber-tired car |
| CN104061212B (en) * | 2014-06-06 | 2017-01-25 | 中国煤炭科工集团太原研究院有限公司 | Electric hydraulic control running system for bracket carrier |
| CN106762920B (en) * | 2017-03-23 | 2019-01-15 | 陕西奥力信工程机械有限公司 | A kind of hydraulic system with powershift valve |
| CN110979491A (en) * | 2019-12-28 | 2020-04-10 | 中国煤炭科工集团太原研究院有限公司 | Crawler-type does not have and supports singly strides support carrier repeatedly |
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