Fully mechanized coal mining face liquid supply system

Abstract

The utility model discloses a fully mechanized coal mining face liquid supply system which comprises a fully mechanized coal mining face, a plurality of hydraulic supports, a first gate road, a second gate road, a first liquid supply device and a second liquid supply device, the hydraulic supports are arranged at intervals in the length direction of the fully mechanized coal mining face, and each hydraulic support is divided into a first part and a second part. The first crossheading and the second crossheading are arranged at the head end and the tail end of the fully mechanized coal mining face at intervals; the first liquid supply device is arranged in the first gate road, and the second liquid supply device is arranged in the second gate road. According to the liquid supply system for the fully mechanized coal mining face, liquid supply efficiency can be improved through partitioned liquid supply, energy loss and pressure drop caused by long-distance liquid supply are reduced, it is guaranteed that all hydraulic supports can obtain stable hydraulic supply, and the working efficiency of the fully mechanized coal mining face is improved. The phenomena of insufficient initial supporting force of the support, low support moving speed, support loss of an intelligent control system and the like caused by insufficient flow and pressure of a liquid supply system are avoided, stable operation of the hydraulic support is guaranteed, and fully-mechanized mining efficiency and safety are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid supply equipment, and particularly relates to a liquid supply system for a fully-mechanized mining face. Background Art

[0002] With the development of fully-mechanized mining technology and equipment, and for the purpose of improving the mining efficiency and resource recovery rate, lengthening the length of the fully-mechanized mining face has become an important development direction. However, when the fully-mechanized mining face is lengthened, the number of hydraulic supports to be arranged will increase accordingly, and at the same time, it brings challenges to the liquid supply of the hydraulic supports. If the liquid supply distance is too long, the pressure and flow loss of the inlet and return liquid will be large, and the hydraulic supports far from the pump station end may have insufficient liquid supply capacity due to insufficient pressure and flow, resulting in insufficient initial support force of the supports, slow support moving speed, and phenomena such as loss of supports in the intelligent control system, seriously affecting the safe and efficient mining of the fully-mechanized mining face. Content of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems in the related art to some extent. For this purpose, an embodiment of the utility model proposes a liquid supply system for a fully-mechanized mining face.

[0004] The liquid supply system for a fully-mechanized mining face according to an embodiment of the utility model includes a fully-mechanized mining face, a plurality of hydraulic supports, a first gate roadway, a second gate roadway, a first liquid supply device, and a second liquid supply device. The plurality of hydraulic supports are arranged at intervals along the length direction of the fully-mechanized mining face. The plurality of hydraulic supports are divided into a first part and a second part. Each of the first part and the second part includes at least one of the hydraulic supports. The first part is arranged adjacent to the head end of the fully-mechanized mining face, and the second part is arranged adjacent to the tail end of the fully-mechanized mining face. The first gate roadway and the second gate roadway are arranged at intervals at the head end and the tail end of the fully-mechanized mining face. The first liquid supply device is arranged in the first gate roadway and is used to supply liquid to the hydraulic supports in the first part. The second liquid supply device is arranged in the second gate roadway and is used to supply liquid to the hydraulic supports in the second part.

[0005] In some embodiments, the first liquid supply device includes a first pump station, a first liquid supply pipe, and a first return liquid pipe. The hydraulic supports in the first part are communicated with the first pump station through the first liquid supply pipe and the first return liquid pipe.

[0006] In some embodiments, a first accumulator group is arranged on the first liquid supply pipe, and the first accumulator group is located in the first gate roadway.

[0007] In some embodiments, a second accumulator group is further arranged on the first liquid supply pipe. The second accumulator group is arranged at the head end of the fully-mechanized mining face and is located between the first accumulator and the hydraulic supports in the first part.

[0008] In some embodiments, a first safety valve and a first one-way valve are provided on the first liquid supply pipe. The first safety valve is located in the first gate road and is adjacent to the first pumping station. The first one-way valve is located between the first safety valve and the first accumulator bank. The first one-way valve has a first liquid inlet and a first liquid outlet. The first liquid inlet is communicated with the first safety valve, and the first liquid outlet is communicated with the first accumulator bank.

[0009] In some embodiments, the second liquid supply device includes a second pumping station, a second liquid supply pipe, and a second liquid return pipe. The hydraulic supports in the second part are communicated with the second pumping station through the second liquid supply pipe and the second liquid return pipe.

[0010] In some embodiments, a third accumulator bank is provided on the second liquid supply pipe. The third accumulator bank is located in the second gate road.

[0011] In some embodiments, a fourth accumulator bank is further provided on the second liquid supply pipe. The fourth accumulator bank is arranged at the tail end of the fully-mechanized coal mining face and is located between the third accumulator bank and the hydraulic supports in the first part.

[0012] In some embodiments, a second safety valve and a second one-way valve are provided on the second liquid supply pipe. The second safety valve is located in the second gate road and is adjacent to the second pumping station. The second one-way valve is located between the second safety valve and the third accumulator bank. The second one-way valve has a second liquid inlet and a second liquid outlet. The second liquid inlet is communicated with the second safety valve, and the second liquid outlet is communicated with the third accumulator bank.

[0013] In some embodiments, the number of hydraulic supports in the first part is the same as the number of hydraulic supports in the second part.

[0014] The fully-mechanized coal mining face liquid supply system according to the embodiment of the present invention can improve the liquid supply efficiency through zoned liquid supply, reduce the energy loss and pressure drop caused by long-distance liquid supply, ensure that all hydraulic supports can obtain stable hydraulic supply, avoid the failure of the supports caused by insufficient pressure, ensure the stable operation of the hydraulic supports, and improve the fully-mechanized coal mining efficiency and safety. Description of the Drawings

[0015] Figure 1 is a schematic diagram of the fully-mechanized coal mining face liquid supply system according to the embodiment of the present invention.

[0016] Reference Signs:

[0017] 100, Fully-mechanized mining face liquid supply system; 1, Fully-mechanized mining face; 2, Hydraulic support; 3, First part; 4, Second part; 5, First gateway; 6, Second gateway; 7, First pump station; 8, First liquid supply pipe; 9, First return liquid pipe; 10, First accumulator group; 11, Second accumulator group; 12, First safety valve; 13, First check valve; 14, Second pump station; 15, Second liquid supply pipe; 16, Second return liquid pipe; 17, Third accumulator group; 18, Fourth accumulator group; 19, Second safety valve; 20, Second check valve. Detailed implementation manners

[0018] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation to the present invention.

[0019] As Figure 1 shown, the fully-mechanized mining face liquid supply system 100 of the embodiment of the present invention includes a fully-mechanized mining face 1, a plurality of hydraulic supports 2, a first gateway 5, a second gateway 6, a first liquid supply device and a second liquid supply device. The plurality of hydraulic supports 2 are arranged at intervals along the length direction of the fully-mechanized mining face 1. The plurality of hydraulic supports 2 are divided into a first part 3 and a second part 4. Each of the first part 3 and the second part 4 includes at least one hydraulic support 2. The first part 3 is arranged adjacent to the head end of the fully-mechanized mining face 1, and the second part 4 is arranged adjacent to the tail end of the fully-mechanized mining face 1. The first gateway 5 and the second gateway 6 are arranged at intervals at the head end and the tail end of the fully-mechanized mining face 1. The first liquid supply device is arranged in the first gateway 5 and is used for supplying liquid to the hydraulic supports 2 in the first part 3. The second liquid supply device is arranged in the second gateway 6 and is used for supplying liquid to the hydraulic supports 2 in the second part 4.

[0020] The fully-mechanized mining face liquid supply system 100 of the embodiment of the present invention divides the hydraulic supports 2 into two parts. The hydraulic supports 2 in the first part 3 are close to the head end of the fully-mechanized mining face 1, while the second part 4 is close to the tail end. The purpose is to reduce the liquid supply distance, thereby reducing the pressure loss caused by too long liquid supply distance. The setting of the first gateway 5 and the second gateway 6 provides a layout space for the liquid supply device. The first liquid supply device and the second liquid supply device are respectively located in the corresponding gateways and directly provide hydraulic power and liquid circulation for the nearby hydraulic supports 2. Due to the shortening of the liquid supply distance, the pressure loss of the inlet and return liquid can be effectively controlled, ensuring that the hydraulic supports 2, especially the hydraulic supports 2 far from the liquid supply device end, can obtain sufficient pressure support and avoiding the phenomenon of support loss.

[0021] Thus, the fully-mechanized mining face liquid supply system 100 of the embodiment of the present utility model can improve the liquid supply efficiency through zoned liquid supply, reduce the energy loss and pressure drop caused by long-distance liquid supply, ensure that all hydraulic supports 2 can obtain stable hydraulic supply, avoid the failure of the supports due to insufficient pressure, guarantee the stable operation of the hydraulic supports 2, and improve the fully-mechanized mining efficiency and safety.

[0022] In some embodiments, the first liquid supply device includes a first pump station 7, a first liquid supply pipe 8, and a first liquid return pipe 9. The hydraulic supports 2 in the first part 3 are connected to the first pump station 7 through the first liquid supply pipe 8 and the first liquid return pipe 9.

[0023] The first pump station 7 is the power source of the liquid supply system, responsible for providing high-pressure liquid for the hydraulic supports 2 in the first part 3. The first pump station 7 usually adjusts the liquid supply pressure and flow rate according to the requirements of the working face. The first liquid supply pipe 8 is a pipe that transports high-pressure liquid from the first pump station 7 to the hydraulic supports 2. The design of the first liquid supply pipe 8 needs to be able to withstand high pressure and have good sealing performance to prevent liquid leakage. The first liquid return pipe 9 is responsible for returning the low-pressure liquid generated after the hydraulic supports 2 work to the first pump station 7 or the recovery device for recycling or discharging. The first liquid return pipe 9 usually has a larger diameter to facilitate the smooth return of the liquid. In this way, the hydraulic supports 2 in the first part 3 can be connected to the first pump station 7 through the first liquid supply pipe 8 and the first liquid return pipe 9, realizing the liquid supply and liquid return of the hydraulic supports 2, which helps to reduce the pressure loss caused by long-distance liquid supply and improve the liquid supply efficiency.

[0024] In some embodiments, a first accumulator group 10 is provided on the first liquid supply pipe 8, and the first accumulator group 10 is located in the first gate road 5.

[0025] For example, as Figure 1 shown, the first accumulator group 10 includes a plurality of accumulators connected in series. The first accumulator group 10 can store liquid and energy. When the pressure of the liquid supplied by the first pump station 7 fluctuates or the demand changes, the first accumulator group 10 can help balance and absorb the pressure fluctuations output by the first pump station 7, thereby reducing the load of the pump station and extending the service life of the pump station and the system, effectively ensuring that the first pump station 7 can output a stable liquid supply. The first accumulator group 10 can also be used to adjust the flow rate. When the liquid demand in the system changes, the first accumulator group 10 can release or store liquid to meet the working requirements of the hydraulic supports 2. In the case of a failure of the first pump station 7 or a liquid supply interruption, the first accumulator group 10 can provide a certain amount of pressure support to prevent the hydraulic supports 2 from losing stability due to a sudden drop in pressure.

[0026] In some embodiments, a second accumulator group 11 is further provided on the first liquid supply pipe 8. The second accumulator group 11 is arranged at the head end of the fully mechanized coal mining face 1 and is located between the first accumulator and the first part 3 of the hydraulic supports 2.

[0027] For example, the second accumulator group 11 includes a plurality of accumulators connected in series. The second accumulator group 11 is located between the first accumulator group 10 and the first part 3 of the hydraulic supports 2 and can provide additional pressure support for these supports. The second accumulator group 11 can help regulate the flow rate of the hydraulic supports 2 to ensure more uniform and stable flow rate distribution during the operation of the hydraulic supports 2. When the system load changes, the second accumulator group 11 can respond quickly to provide or absorb the required liquid and energy, thereby improving the overall response speed of the system. In addition, since the second accumulator group 11 is relatively large in volume and not easy to be installed in the relatively small-sized hydraulic supports 2, by arranging the second accumulator group 11 outside the hydraulic supports 2, it is convenient for the installation and maintenance operations of the second accumulator group 11, and at the same time, it can also regulate the relatively small-sized hydraulic supports 2.

[0028] In some embodiments, a first safety valve 12 and a first check valve 13 are provided on the first liquid supply pipe 8. The first safety valve 12 is located in the first gate roadway 5 and is adjacent to the first pump station 7. The first check valve 13 is located between the first safety valve 12 and the first accumulator group 10. The first check valve 13 has a first liquid inlet and a first liquid outlet. The first liquid inlet is communicated with the first safety valve 12, and the first liquid outlet is communicated with the first accumulator group 10.

[0029] The first safety valve 12 is located in the first gate roadway 5 and is adjacent to the first pump station 7. When the system pressure exceeds the set value, the first safety valve 12 will open to release the excess pressure to protect the system from damage caused by excessive pressure. At the same time, when the first pump station 7 fails or the liquid supply is interrupted, the first safety valve 12 can prevent the backflow of the return liquid to the first pump station 7 and protect the first pump station 7 from damage.

[0030] The first check valve 13 is located between the first safety valve 12 and the first accumulator group 10. A check valve has the characteristic of allowing fluid to flow in only one direction, that is, it can only flow from the liquid inlet to the liquid outlet to prevent the reverse flow of the fluid. Here, the first check valve 13 ensures that the liquid can only flow from the first check valve 13 to the second accumulator group 11 and will not flow back to the first pump station 7, maintaining the one-way flow characteristic of the system.

[0031] Through such a configuration, the first liquid supply device can not only provide stable hydraulic power but also ensure the safety and reliability of the system under various abnormal conditions. The settings of the safety valve and the check valve improve the protection ability of the system, prevent damage that may be caused by abnormal pressure or fluid backflow, and thus ensure the stable operation of the hydraulic supports 2 and the safety of the coal mining work.

[0032] In some embodiments, the second liquid supply device includes a second pumping station 14, a second liquid supply pipe 15, and a second liquid return pipe 16. The hydraulic supports 2 in the second part 4 are connected to the second pumping station 14 through the second liquid supply pipe 15 and the second liquid return pipe 16.

[0033] The second pumping station 14 is the power source of the liquid supply system and is responsible for providing high-pressure liquid for the hydraulic supports 2 in the second part 4. The second pumping station 14 usually adjusts the liquid supply pressure and flow rate according to the requirements of the working face. The second liquid supply pipe 15 is a pipe that transports high-pressure liquid from the second pumping station 14 to the hydraulic supports 2. The design of the second liquid supply pipe 15 needs to be able to withstand high pressure and have good sealing performance to prevent liquid leakage. The second liquid return pipe 16 is responsible for returning the low-pressure liquid generated after the hydraulic supports 2 work back to the second pumping station 14 or the recovery device for recycling or discharging. The second liquid return pipe 16 usually has a relatively large diameter to facilitate the smooth return of the liquid. In this way, the hydraulic supports 2 in the second part 4 can be connected to the second pumping station 14 through the second liquid supply pipe 15 and the second liquid return pipe 16, realizing the liquid supply and liquid return of the hydraulic supports 2, which helps to reduce the pressure loss caused by long-distance liquid supply and improve the liquid supply efficiency.

[0034] In some embodiments, a third accumulator group 17 is provided on the second liquid supply pipe 15, and the third accumulator group 17 is located in the second gate road 6.

[0035] For example, as Figure 1 shown, the third accumulator group 17 includes a plurality of accumulators connected in series. The third accumulator group 17 can store liquid and energy. When the pressure of the liquid supplied by the second pumping station 14 fluctuates or the demand changes, the third accumulator group 17 can help balance and absorb the pressure fluctuations output by the second pumping station 14, thereby reducing the load on the pumping station and extending the service life of the pumping station and the system, effectively ensuring that the second pumping station 14 can output a stable liquid supply. The third accumulator group 17 can also be used to adjust the flow rate. When the liquid demand in the system changes, the third accumulator group 17 can release or store liquid to meet the working requirements of the hydraulic supports 2. In the event of a failure or interruption of the liquid supply of the second pumping station 14, the third accumulator group 17 can provide a certain amount of pressure support to prevent the hydraulic supports 2 from losing stability due to a sudden drop in pressure.

[0036] In some embodiments, a fourth accumulator group 18 is also provided on the second liquid supply pipe 15. The fourth accumulator group 18 is provided at the tail end of the fully-mechanized coal mining face 1 and is located between the third accumulator group 17 and the hydraulic supports 2 in the first part 3.

[0037] For example, the fourth accumulator group 18 includes multiple accumulators connected in series. The fourth accumulator group 18 is located between the third accumulator group 17 and the second part 4 of the hydraulic support 2 and can provide additional pressure support for these supports. The fourth accumulator group 18 can help regulate the flow rate of the hydraulic support 2 to ensure more uniform and stable flow rate distribution during the operation of the hydraulic support 2. When the system load changes, the fourth accumulator group 18 can respond quickly to provide or absorb the required liquid and energy, thereby improving the overall response speed of the system. In addition, since the fourth accumulator group 18 is relatively large in volume and not easy to be installed in the relatively small-sized hydraulic support 2, by arranging the fourth accumulator group 18 outside the hydraulic support 2, it is convenient for the installation and maintenance operations of the fourth accumulator group 18, and at the same time, it can also adjust the relatively small-sized hydraulic support 2.

[0038] In some embodiments, a second safety valve 19 and a second one-way valve 20 are provided on the second liquid supply pipe 15. The second safety valve 19 is located in the second crossheading 6 and is arranged adjacent to the second pump station 14. The second one-way valve 20 is located between the second safety valve 19 and the third accumulator group 17. The second one-way valve 20 has a second liquid inlet and a second liquid outlet. The second liquid inlet is communicated with the second safety valve 19, and the second liquid outlet is communicated with the third accumulator group 17.

[0039] The second safety valve 19 is located in the second crossheading 6 and is arranged adjacent to the second pump station 17. When the system pressure exceeds the set value, the second safety valve 19 will open to release the excess pressure to protect the system from damage caused by excessive pressure. At the same time, when the second pump station 17 fails or the liquid supply is interrupted, the second safety valve 19 can prevent the return liquid from flowing back to the second pump station 17 to protect the second pump station 17 from damage.

[0040] The second one-way valve 20 is located between the second safety valve 19 and the third accumulator group 17. A one-way valve has the characteristic of allowing fluid to flow in one direction only, that is, it can only flow from the liquid inlet to the liquid outlet to prevent the reverse flow of the fluid. Here, the second one-way valve 20 ensures that the liquid can only flow from the second one-way valve 20 to the second accumulator group 11 and will not flow back to the second pump station 17, maintaining the one-way flow characteristic of the system.

[0041] Through such a configuration, the second liquid supply device can not only provide stable hydraulic power but also ensure the safety and reliability of the system under various abnormal conditions. The settings of the safety valve and the one-way valve improve the protection ability of the system, prevent the damage that may be caused by abnormal pressure or reverse flow of the fluid, and thus ensure the stable operation of the hydraulic support 2 and the safety of the coal mining work.

[0042] In some embodiments, the number of hydraulic supports 2 in the first part 3 is the same as the number of hydraulic supports 2 in the second part 4.

[0043] The same number of hydraulic supports 2 helps to balance the working loads of the two parts, making the system liquid supply and support operation more uniform and improving the overall working efficiency. The same number of hydraulic supports 2 can simplify the design of the liquid supply system because there is no need to make special considerations for the differences in the number of supports in different parts. The same number of hydraulic supports 2 makes management and maintenance more convenient, and unified standards and procedures can be adopted for maintenance and fault handling.

[0044] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0045] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0046] In the present utility model, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0047] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0048] In the present utility model, the terms "an embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0049] Although the above embodiments have been shown and described, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Any changes, modifications, substitutions, and variations made by those of ordinary skill in the art to the above embodiments are within the protection scope of the present utility model.

Claims

1. A liquid supply system for a fully mechanized mining working face, characterized in that: include: Comprehensive mining working face (1); A plurality of hydraulic supports (2), the plurality of hydraulic supports (2) being arranged at intervals along the length direction of the fully mechanized mining working face (1), the plurality of hydraulic supports (2) being divided into a first part (3) and a second part (4), each of the first part (3) and the second part (4) comprising at least one hydraulic support (2), the first part (3) being arranged adjacent to the head end of the fully mechanized mining working face (1), and the second part (4) being arranged adjacent to the tail end of the fully mechanized mining working face (1); A first drift (5) and a second drift (6), wherein the first drift (5) and the second drift (6) are arranged at intervals at the head end and the tail end of the fully mechanized mining working face (1); A first liquid supply device and a second liquid supply device, wherein the first liquid supply device is arranged in the first chute (5) and is used to supply liquid to the hydraulic support (2) in the first part (3), and the second liquid supply device is arranged in the second chute (6) and is used to supply liquid to the hydraulic support (2) in the second part (4).

2. The liquid supply system for fully mechanized mining working face according to claim 1 is characterized in that: The first liquid supply device comprises a first pump station (7), a first liquid supply pipe (8) and a first liquid return pipe (9); the hydraulic support (2) in the first part (3) is connected to the first pump station (7) via the first liquid supply pipe (8) and the first liquid return pipe (9).

3. The liquid supply system for fully mechanized mining working face according to claim 2 is characterized in that: A first accumulator group (10) is provided on the first liquid supply pipe (8), and the first accumulator group (10) is located in the first chute (5).

4. The liquid supply system for fully mechanized mining working face according to claim 3 is characterized in that: A second accumulator group (11) is also provided on the first liquid supply pipe (8), and the second accumulator group (11) is arranged at the head end of the comprehensive mining working face (1) and is located between the first accumulator and the first part (3) hydraulic support (2).

5. The liquid supply system for fully mechanized mining working face according to claim 3 is characterized in that: The first liquid supply pipe (8) is provided with a first safety valve (12) and a first non-return valve (13); the first safety valve (12) is located in the first chute (5) and is arranged adjacent to the first pump station (7); the first non-return valve (13) is located between the first safety valve (12) and the first accumulator group (10); the first non-return valve (13) has a first liquid inlet and a first liquid outlet; the first liquid inlet is communicated with the first safety valve (12); and the first liquid outlet is communicated with the first accumulator group (10).

6. The liquid supply system for fully mechanized mining working face according to claim 1, characterized in that: The second liquid supply device comprises a second pump station (14), a second liquid supply pipe (15) and a second liquid return pipe (16); the hydraulic support (2) in the second part (4) is connected to the second pump station (14) via the second liquid supply pipe (15) and the second liquid return pipe (16).

7. The liquid supply system for fully mechanized mining working face according to claim 6, characterized in that: A third accumulator group (17) is provided on the second liquid supply pipe (15), and the third accumulator group (17) is located in the second chute (6).

8. The liquid supply system for fully mechanized mining working face according to claim 7 is characterized in that: A fourth accumulator group (18) is also provided on the second liquid supply pipe (15), and the fourth accumulator group (18) is arranged at the tail end of the comprehensive mining working face (1) and is located between the third accumulator group (17) and the first part (3) hydraulic support (2).

9. The liquid supply system for fully mechanized mining working face according to claim 7, characterized in that: The second liquid supply pipe (15) is provided with a second safety valve (19) and a second non-return valve (20); the second safety valve (19) is located in the second chute (6) and is arranged adjacent to the second pump station (14); the second non-return valve (20) is located between the second safety valve (19) and the third accumulator group (17); the second non-return valve (20) has a second liquid inlet and a second liquid outlet; the second liquid inlet is communicated with the second safety valve (19), and the second liquid outlet is communicated with the third accumulator group (17).

10. The liquid supply system for fully mechanized mining working face according to claim 1, characterized in that: The number of hydraulic supports (2) in the first part (3) is the same as the number of hydraulic supports (2) in the second part (4).

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