1. A liquid return system is characterized in that: including setting up liquid return case (1) that is used for carrying out the collection to the emulsion that hydraulic support flows in hydraulic support liquid outlet department, power device (2) and the liquid return pipe (3) of intercommunication between power device (2) export and emulsion pump station in liquid return case (1) exit, be provided with control on liquid return pipe (3) return first control assembly (31) of liquid pipe (3) state of opening and shutting.

2. The liquid return system according to claim 1, wherein: the power device (2) comprises a water pump.

3. The liquid return system according to claim 1, wherein: the liquid return pipe (3) is provided with a plurality of, and is a plurality of the liquid return pipe (3) sets up in parallel, every all be provided with first control assembly (31) on the liquid return pipe (3).

4. The liquid return system according to claim 1, wherein: the first control assembly (31) comprises a first solenoid valve configured to open when the amount of emulsion in the tank (1) is above a set value.

5. The liquid return system according to claim 1, wherein: a circulating pipe (4) is arranged between the outlet of the power device (2) and the liquid return tank (1), and a second control assembly (41) is arranged on the circulating pipe (4).

6. The liquid return system according to claim 5, wherein: the circulating pipes (4) are arranged in a plurality of parallel connection modes, and a second control assembly (41) for controlling the opening and closing states of the circulating pipes (4) is arranged on each circulating pipe (4).

7. The liquid return system according to claim 5, wherein: the second control assembly (41) comprises a second solenoid valve configured to be activated when the amount of emulsion inside the tank (1) is lower than a set value.

8. A fluid return system according to claim 4 or 7, wherein: and a liquid level sensor (11) is installed in the liquid return tank (1) and used for detecting the amount of the emulsion in the liquid return tank (1).

Background

In the coal mining process, a large amount of hydraulic execution equipment is needed to work, and the hydraulic execution equipment is equipment driven to operate by using hydraulic pressure, such as: the hydraulic support is one of important hydraulic execution devices of the coal fully mechanized mining face. Taking the hydraulic support as an example, the power source of the hydraulic support is that the emulsion in an emulsion pump station is conveyed through a liquid supply pipeline to meet the power requirement of the hydraulic support. In the actual use process, the emulsion pump conveys the emulsion in the emulsion box to the hydraulic support of the working face through the liquid inlet pipe to realize remote liquid supply, and meanwhile, the emulsion in the hydraulic support is conveyed back to the emulsion pump station through the liquid return pipe.

The flow of the emulsion flowing from the hydraulic support to the emulsion pump station is not constant, the emulsion completely flows back to the emulsion pump station by the flow of the hydraulic support, and the distance between the emulsion pump station and the hydraulic support is far, so that the on-way resistance of the emulsion in the process of returning the emulsion is too large when the height difference occurs between the emulsion pump station and the hydraulic support, and the normal returning of the emulsion on the hydraulic support is influenced.

Disclosure of Invention

In order to reduce the emulsion at the on-way resistance of returning the liquid in-process, reduce the influence that the normal liquid that returns of emulsion caused on the hydraulic support, this application provides a liquid system returns.

The application provides a return liquid system adopts following technical scheme:

the utility model provides a return liquid system, is used for carrying out the return liquid case of collecting at hydraulic support liquid outlet department to the emulsion that hydraulic support flowed out, feeds through the power device in return liquid case exit and feeds through the liquid return pipe between power device export and emulsion pump station including setting up, be provided with control on the liquid return pipe return the first control subassembly of liquid pipe state of opening and shutting.

Through adopting above-mentioned technical scheme, the emulsion that flows out from the hydraulic support liquid outlet will directly reach back in the liquid case to through during power device carries the emulsion that returns in the liquid case to the emulsion pump station through returning the liquid pipe, reduced the emulsion at the on-way resistance that returns the liquid in-process, reduced the influence that the normal liquid that returns of emulsion caused on the hydraulic support. And in the conveying process, the first control assembly controls the opening and closing state of the liquid return box and controls the flowing speed of the emulsion so as to adapt to the flow of the emulsion flowing out of the liquid outlet of the hydraulic support.

Optionally, the power device comprises a water pump.

Through adopting above-mentioned technical scheme, can carry the emulsion in the liquid case that returns to the emulsion pump station through the water pump in, reduced the on-the-way resistance of emulsion at the liquid in-process that returns.

Optionally, the liquid return pipe is provided with a plurality ofly, and is a plurality of the parallelly connected setting of liquid return pipe, every all be provided with first control assembly on the liquid return pipe.

Through adopting above-mentioned technical scheme, when the emulsion in returning the liquid case is more, can carry out the transport work of emulsion through a plurality of liquid pipes that return.

Optionally, the first control assembly comprises a first solenoid valve configured to open when the amount of emulsion in the liquid return tank is higher than a set value.

Through adopting above-mentioned technical scheme, can realize the automatic control to the liquid return pipe state of opening and shutting through first solenoid valve.

Optionally, a circulating pipe is arranged between the outlet of the power device and the liquid return tank, and a second control assembly for controlling the opening and closing state of the circulating pipe is arranged on the circulating pipe.

By adopting the technical scheme, when the emulsion in the liquid return tank is less, the circulation of the circulating pipe can be controlled by the second control assembly, so that the emulsion pumped out from the liquid return tank by the power device flows back to the liquid return tank again through the circulating pipe, and the power device is prevented from being damaged due to idling or frequent starting and stopping.

Optionally, the circulating pipe is provided with a plurality of circulating pipes, the plurality of circulating pipes are arranged in parallel, and each circulating pipe is provided with a second control assembly.

By adopting the technical scheme, the emulsion pumped out from the liquid return tank by the power device can flow back to the liquid return tank through the plurality of circulating pipes, so that the phenomenon that the emulsion cannot return normally after a single circulating pipe is damaged is avoided.

Optionally, the second control assembly comprises a second solenoid valve configured to be activated when the amount of emulsion in the liquid return tank is lower than a set value.

By adopting the technical scheme, the automatic control of the opening and closing state of the circulating pipe can be realized through the second electromagnetic valve, and when the emulsion in the liquid return box is too low, the second electromagnetic valve can automatically control the communication of the circulating pipe.

Optionally, a liquid level sensor is installed in the liquid return tank and used for detecting the amount of the emulsion in the liquid return tank.

Through adopting above-mentioned technical scheme, can carry out real-time detection to the emulsion volume in the liquid return case through level sensor to control whether the emulsion flows back to the emulsion pump station or in circulating flow to the liquid return case.

In summary, the present application includes at least one of the following beneficial technical effects:

1. due to the arrangement of the liquid return box and the power device, the on-way resistance of the emulsion return of the hydraulic support is greatly reduced, and the influence on the normal emulsion return of the emulsion on the hydraulic support is reduced; the problem that the support does not move, slowly moves and malfunctions due to large liquid return resistance when the hydraulic support is remotely supplied with liquid in the coal mine industry is solved, and the accuracy and the high efficiency of the movement of the hydraulic support are ensured; the technical guarantee of remote centralized liquid supply is provided for the ultra-long mining face with the mining distance reaching 10km in the coal mine industry;

2. the circulating pipe is arranged so that when the emulsion in the liquid return tank is less, the emulsion output by the power device returns to the liquid return tank again, and the power device is prevented from idling or being frequently started and stopped to cause damage;

3. the liquid level sensor is arranged to detect the amount of the emulsion in the liquid return tank in real time, and the first control assembly and the second control assembly are operated through detected data to control the emulsion to flow back to the emulsion pump station or flow back to the liquid return tank.

Drawings

Fig. 1 is a schematic view of the overall structure of the present application.

Fig. 2 is a schematic diagram of a connection manner of a control circuit according to the present application.

Description of reference numerals: 1. a liquid return tank; 11. a liquid level sensor; 2. a power plant; 3. a liquid return pipe; 31. a first control assembly; 4. a circulation pipe; 41. a second control assembly.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses a liquid return system. Referring to fig. 1, the liquid return system comprises a liquid return tank 1 arranged at a liquid outlet of the hydraulic support and used for collecting the emulsion flowing out of the hydraulic support, a power device 2 installed on one side of the liquid return tank 1, and a liquid return pipe 3 communicated between an outlet of the power device 2 and an emulsion pump station, wherein an inlet of the power device 2 is communicated with the liquid return tank 1, and a first control assembly 31 for controlling the opening and closing state of the liquid return pipe 3 is arranged on the liquid return pipe 3. The emulsion that flows from hydraulic support will directly arrive in returning liquid case 1, then carry to returning liquid pipe 3 through power device 2 in to finally arrive in the emulsion pump station, accomplish the liquid back work of emulsion, make the emulsion that flows from hydraulic support can be smooth flow to the emulsion pump station in, reduced the on-the-way resistance of emulsion at the liquid back in-process, reduced the influence that causes the normal liquid back of emulsion on the hydraulic support.

Wherein, power device 2 can select for use the water pump, can take out the emulsion in the liquid return case 1 through the water pump and carry to the emulsion pump station in, provides power for the normal liquid return of emulsion.

Wherein, flow to the emulsion pump station from the water pump for the control, it is provided with many to return liquid pipe 3, many return liquid pipe 3 parallelly connected settings, all be provided with first control assembly 31 on every return liquid pipe 3, every first control assembly 31 is used for controlling the state that opens and shuts on every return liquid pipe 3, open and shut through the first control assembly 31 of controlling different quantity, can select the quantity that flows to the return liquid pipe 3 of emulsion pump station from the water pump, flow to the flow of emulsion pump station from the water pump with control. In the present application, four liquid return pipes 3 are provided as an example.

Referring to fig. 1 and 2, the first control assembly 31 includes a first electromagnetic valve disposed on each liquid return tube 3, and the on/off of the liquid return tube 3 where the first electromagnetic valve is located can be controlled by controlling the open/close state of the first electromagnetic valve. Wherein, the first solenoid valve is configured to start when the emulsion in the liquid return tank 1 is higher than the set value, specifically, install level sensor 11 in the liquid return tank 1, can detect the emulsion volume in the liquid return tank 1 through level sensor 11, and level sensor 11 is connected with every first solenoid valve electricity through the PLC controller. The PLC controller passes through the emulsion volume in the liquid return case 1 that level sensor 11 detected, just can control the first solenoid valve of different positions and open to make the liquid return pipe 3 of suitable quantity switch on, control the emulsion volume that flows to the emulsion pump station.

Referring to fig. 1, in order to avoid damage to the water pump due to idling or frequent start and stop of the water pump when the emulsion in the liquid return tank 1 is too small, a circulating pipe 4 is further disposed between an outlet of the water pump and the liquid return tank 1, and a second control assembly 41 for controlling the on-off state of the circulating pipe 4 is further disposed on the circulating pipe 4.

Wherein circulating pipe 4 can be provided with many, many circulating pipes 4 set up in parallel, all be provided with second control assembly 41 on every circulating pipe 4, every second control assembly 41 is used for controlling the break-make state of every circulating pipe 4, open through controlling the second control assembly 41 of different quantity, just can make the circulating pipe 4 intercommunication of different quantity, with the emulsion volume of control flow back in the liquid return case 1, make the emulsion can be in liquid return case 1, reciprocal flow in water pump and circulating pipe 4, avoid the water pump idle running or the condition that frequently opens and stop to appear. The present application will be described by taking the example in which two circulation pipes 4 are provided.

Referring to fig. 1 and 2, the second control unit 41 includes a second solenoid valve provided on each circulation pipe 4, and the on/off state of the circulation pipe 4 where the second solenoid valve is located can be controlled by controlling the opening/closing of the second solenoid valve. The second electromagnetic valve is configured to be started when the amount of the emulsion in the liquid return tank 1 is lower than a set value, specifically, the second electromagnetic valve is also electrically connected with the liquid level sensor 11 through the PLC controller, and the PLC controller can control the second electromagnetic valve to open and close through the amount of the emulsion in the liquid return tank 1 detected by the liquid level sensor 11 so as to control whether the emulsion in the liquid return tank 1 flows to the emulsion pump station through the liquid return pipe 3 or flows back to the liquid return tank 1 through the circulating pipe 4.

The implementation principle of a liquid return system in the embodiment of the application is as follows: during the use, when the emulsion volume in the liquid return case 1 is more, the PLC controller will control the first solenoid valve of different quantity and open, the second solenoid valve is closed simultaneously, thereby control the liquid return pipe 3 of different quantity and switch on, with emulsion to the emulsion pump station in the control liquid return case 1, and the flow of control flow to the emulsion pump station, make the emulsion on the hydraulic support can be smooth flow to the emulsion pump station in, the on-way resistance of emulsion at the liquid return in-process has been reduced, reduce the influence that the normal liquid return of emulsion caused on the hydraulic support. When the emulsion in the liquid return tank 1 is less, the PLC controller controls the first electromagnetic valves to be closed and controls the second electromagnetic valves with different numbers to be opened so as to control the conduction of the circulating pipe 4, so that the emulsion pumped out by the water pump from the liquid return tank 1 flows back to the liquid return tank 1 through the circulating pipe 4 again, the circulation is performed in sequence, and the condition that the water pump idles or is frequently started and stopped is avoided.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.