Energy storage device and distributed energy storage system for hydraulic support stand column

Abstract

The invention provides an energy storage device and a distributed energy storage system for a hydraulic support stand column, and the energy storage device comprises a first energy accumulator, a second energy accumulator, a switching valve group and a control module; wherein the first end of the switching valve group is connected with the liquid changing end of the first energy accumulator, the second end of the switching valve group is connected with the liquid changing end of the second energy accumulator, and the third end of the switching valve group is arranged between the liquid inlet end of the stand column and the liquid outlet end of the pump station; the control module is used for controlling the first end and the third end of the switching valve set to be connected when the hydraulic support conducts pressure maintaining action, and controlling the second end and the third end of the switching valve set to be connected when the hydraulic support conducts support moving action. According to the energy storage device for the hydraulic support stand column and the distributed energy storage system, the mutual influence between the hydraulic support pressure maintaining stage and the hydraulic support moving stage can be effectively reduced, so that the working efficiency of the hydraulic support is effectively improved, and then rapid mining of a working face is guaranteed.

Description

Technical Field

[0001] The present disclosure relates to the field of energy storage technology, and in particular to an energy storage device for a hydraulic support column and a distributed energy storage system. Background Art

[0002] Coal mining regulations generally require that when the hydraulic support columns push the support beams into contact with the roof of the mining face, they maintain pressure for a certain period of time to ensure that the beams maintain sufficient support for the rock strata. This requires the fluid supply system to provide high-pressure emulsion, which maintains pressure and requires little flow. When the columns are lifting, the system is required to provide a high-flow emulsion, typically requiring a lower emulsion pressure. This means that the column operation is divided into a shifting phase, where flow is high but pressure is low, and a maintaining phase, where flow is low but pressure is high. Due to the completely different requirements of these two phases, efficient operation of the hydraulic system is difficult. Summary of the Invention

[0003] The present disclosure aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an object of the present disclosure is to provide an energy storage device and a distributed energy storage system for a hydraulic support column.

[0005] To achieve the above-mentioned objectives, the first aspect of the present disclosure provides an energy storage device for a hydraulic support column, comprising: a first accumulator, a second accumulator, a switching valve group and a control module; wherein the storage pressure of the first accumulator is greater than a first preset pressure, the storage pressure of the second accumulator is greater than a second preset pressure, and the first preset pressure is greater than the second preset pressure; the first end of the switching valve group is connected to the fluid exchange end of the first accumulator, and the second end of the switching valve group is connected to the fluid exchange end of the second accumulator, and the third end of the switching valve group is arranged between the liquid inlet end of the column and the liquid outlet end of the pump station; the signal output end of the control module is connected to the signal input end of the switching valve group, and the control module is used to control the first end and the third end of the switching valve group to be connected when the hydraulic support performs a pressure maintaining action, and to control the second end and the third end of the switching valve group to be connected when the hydraulic support performs a frame moving action.

[0006] Optionally, the switching valve group includes: a first valve body, a first end of the first valve body is connected to the fluid exchange end of the first accumulator, and the second end of the first valve body is arranged between the fluid inlet end of the column and the fluid outlet end of the pump station; a second valve body, a first end of the second valve body is connected to the fluid exchange end of the second accumulator, and the second end of the second valve body is arranged between the fluid inlet end of the column and the fluid outlet end of the pump station; wherein the signal output end of the control module is respectively connected to the signal input end of the first valve body and the signal input end of the second valve body, and the control module is used to control the first end and the second end of the first valve body to be connected when the hydraulic support performs a pressure maintaining action, and to control the first end and the second end of the second valve body to be disconnected, and to control the first end and the second end of the second valve body to be connected when the hydraulic support performs a frame moving action.

[0007] Optionally, the device also includes: a first pressure detection unit, the detection end of the first pressure detection unit is arranged at the fluid exchange end of the first accumulator, and the first pressure detection unit is used to detect the storage pressure of the first accumulator; wherein the signal input end of the control module is connected to the signal output end of the first pressure detection unit, and the control module is used to control the first end and the third end of the switching valve group to be connected when the storage pressure of the first accumulator is not greater than the first preset pressure and the hydraulic support is not in action.

[0008] Optionally, the device also includes: a second pressure detection unit, the detection end of the second pressure detection unit is arranged at the fluid exchange end of the second accumulator, and the second pressure detection unit is used to detect the storage pressure of the second accumulator; wherein the signal input end of the control module is connected to the signal output end of the second pressure detection unit, and the control module is used to control the second end and the third end of the switching valve group to be connected when the storage pressure of the second accumulator is not greater than the second preset pressure and the hydraulic support is not in action.

[0009] Optionally, the device also includes: a third pressure detection unit, the detection end of the third pressure detection unit is arranged in the column, and the third pressure detection unit is used to detect the pressure of the column; wherein the signal input end of the control module is connected to the signal output end of the third pressure detection unit, and the control module is used to control the conduction opening of the first end and the third end of the switching valve group according to the pressure of the column when the hydraulic support performs a pressure maintaining action.

[0010] Optionally, the device further includes: a speed detection unit, the detection end of the speed detection unit is arranged on the column, and the speed detection unit is used to detect the movement speed of the column; wherein the signal input end of the control module is connected to the signal output end of the speed detection unit, and the control module is used to control the conduction opening of the second end and the third end of the switching valve group according to the movement speed of the column when the hydraulic support performs a frame shifting action.

[0011] Optionally, the control module is used to control the first and second ends of the switching valve group to be connected to the third end respectively when the hydraulic support performs a frame moving action and the movement speed of the column is less than a preset speed, and to control the first and second ends of the switching valve group to be disconnected from the third end respectively when the hydraulic support performs a pressure maintaining action after the frame moving action.

[0012] Optionally, the signal input end of the control module is connected to the signal output end of the sensor module in the hydraulic support, and the control module is used to determine the action state of the hydraulic support according to the sensor signal of the sensor module.

[0013] Optionally, the device also includes: a one-way valve, which is arranged between the liquid inlet end of the column and the liquid outlet end of the pump station, and the liquid inlet end of the one-way valve is connected to the liquid outlet end of the pump station, and the liquid outlet end of the one-way valve is connected to the liquid inlet end of the column; wherein the third end of the switching valve group is arranged between the liquid outlet end of the one-way valve and the liquid inlet end of the column.

[0014] A second aspect of the present disclosure provides a distributed energy storage system, comprising: a plurality of energy storage devices for hydraulic support columns as provided in the first aspect of the present disclosure.

[0015] The technical solution provided by the present disclosure may have the following beneficial effects:

[0016] When the hydraulic support is performing a pressure-maintaining action, the control module controls the first and third ends of the switching valve group to be connected, thereby utilizing the oil in the first accumulator with a pressure greater than the first preset pressure and cooperating with the pump station to increase the pressure of the column, thereby meeting the hydraulic support's high-pressure, low-flow pressure-maintaining requirement. Furthermore, when the hydraulic support is performing a frame shifting action, the control module controls the second and third ends of the switching valve group to be connected, thereby utilizing the oil in the second accumulator with a pressure greater than the second preset pressure and cooperating with the pump station to achieve the movement of the column, thereby meeting the hydraulic support's high-flow, low-pressure frame shifting requirement. Thus, by switching the switching valve group and cooperating between the first accumulator and the second accumulator, the mutual influence between the hydraulic support's pressure-maintaining stage and the hydraulic support's frame shifting stage can be effectively reduced, thereby effectively improving the hydraulic support's operating efficiency and ensuring rapid mining of the working face.

[0017] Additional aspects and advantages of the present disclosure will be given in part in the description below and in part will be obvious from the description below, or will be learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present disclosure will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0019] Figure 1 This is a schematic structural diagram of an energy storage device for a hydraulic support column proposed in one embodiment of the present disclosure;

[0020] Figure 2 is a structural diagram of a distributed energy storage system proposed in one embodiment of the present disclosure;

[0021] As shown in the figure: 1, first accumulator, 2, second accumulator;

[0022] 3. Switching valve group, 31. First valve body, 32. Second valve body;

[0023] 4. Control module, 5. Check valve;

[0024] 100. Hydraulic support, 200. Pumping station. DETAILED DESCRIPTION

[0025] The following describes in detail embodiments of the present disclosure, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present disclosure and are not to be construed as limiting the present disclosure. On the contrary, the embodiments of the present disclosure include all variations, modifications, and equivalents that fall within the spirit and scope of the appended claims.

[0026] like Figure 1 As shown, the embodiment of the present disclosure provides an energy storage device for a column of a hydraulic support 100, comprising: a first accumulator 1, a second accumulator 2, a switching valve group 3, and a control module 4. The storage pressure of the first accumulator 1 is greater than a first preset pressure, the storage pressure of the second accumulator 2 is greater than a second preset pressure, and the first preset pressure is greater than the second preset pressure. The first end of the switching valve group 3 is connected to the fluid exchange end of the first accumulator 1, and the second end of the switching valve group 3 is connected to the fluid exchange end of the second accumulator 2. The third end of the switching valve group 3 is disposed between the fluid inlet end of the column and the fluid outlet end of the pump station 200. The signal output end of the control module 4 is connected to the signal input end of the switching valve group 3. The control module 4 is configured to control the first and third ends of the switching valve group 3 to be conductive when the hydraulic support 100 is performing a pressure maintaining action, and to control the second and third ends of the switching valve group 3 to be conductive when the hydraulic support 100 is performing a frame shifting action.

[0027] It can be understood that since the signal output end of the control module 4 is connected to the signal input end of the switching valve group 3, the control module 4 can control the conduction state of the switching valve group 3, and since the first end of the switching valve group 3 is connected to the fluid exchange end of the first accumulator 1, and the second end of the switching valve group 3 is connected to the fluid exchange end of the second accumulator 2, the third end of the switching valve group 3 is arranged between the liquid inlet end of the column and the liquid outlet end of the pump station 200, so that when the control module 4 controls the first end and the third end of the switching valve group 3 to be conductive, the conduction between the fluid exchange end of the first accumulator 1 and the fluid inlet end of the column and between the fluid exchange end of the first accumulator 1 and the fluid outlet end of the pump station 200 can be achieved, and when the control module 4 controls the second end and the third end of the switching valve group 3 to be conductive, the conduction between the fluid exchange end of the second accumulator 2 and the fluid inlet end of the column and between the fluid exchange end of the second accumulator 2 and the fluid outlet end of the pump station 200 can be achieved.

[0028] When the hydraulic support 100 is performing a pressure-maintaining action, the control module 4 controls the first and third ends of the switching valve group 3 to be conductive, thereby utilizing the oil in the first accumulator 1 that is greater than the first preset pressure and cooperating with the pump station 200 to achieve a pressure increase of the column, thereby meeting the high-pressure and low-flow pressure-maintaining requirements of the hydraulic support 100. Moreover, when the hydraulic support 100 is performing a frame shifting action, the control module 4 controls the second and third ends of the switching valve group 3 to be conductive, thereby utilizing the oil in the second accumulator 2 that is greater than the second preset pressure and cooperating with the pump station 200 to achieve the movement of the column, thereby meeting the high-flow and low-pressure frame shifting requirements of the hydraulic support 100. Thus, by switching the switching valve group 3 and cooperating between the first accumulator 1 and the second accumulator 2, the mutual influence between the pressure-maintaining stage of the hydraulic support 100 and the frame shifting stage of the hydraulic support 100 can be effectively reduced, thereby effectively improving the operating efficiency of the hydraulic support 100 and ensuring rapid mining of the working face.

[0029] It should be noted that the hydraulic support 100 is used to support the roof of the coal mining face to achieve underground support. The hydraulic support 100 includes: a base arranged on the ground, a top beam supported on the roof, a shielding beam arranged between the base and the top beam, and a column for driving the top beam to rise and fall. The column uses the pressurized oil (emulsion) provided by the pump station 200 to expand and contract, thereby driving the top beam to rise and fall, thereby realizing the movement and pressure maintenance of the hydraulic support 100.

[0030] In addition, the hydraulic support 100 is also equipped with a sensor module, such as a pressure sensor, a displacement sensor, an angle sensor, a speed sensor, etc. By using the sensor module, the operating status and specific posture of the hydraulic support 100 can be obtained, thereby facilitating the precise control of the hydraulic support 100.

[0031] The storage pressure of the first accumulator 1 is greater than the first preset pressure, and the first preset pressure is greater than the second preset pressure. Based on this, the first accumulator 1 can assist the pump station 200 in quickly maintaining the pressure of the hydraulic support 100. The specific type of the first accumulator 1 can be set according to actual needs and is not limited to this. For example, the first accumulator 1 can be a bladder accumulator or a piston accumulator, preferably a piston accumulator, which can be installed at the base or shield beam of the hydraulic support 100. The rated operating pressure is preferably ≥37.5MPa.

[0032] The first preset pressure is the minimum pressure required for pressure maintenance.

[0033] The storage pressure of the second accumulator 2 is greater than the second preset pressure, and the first preset pressure is greater than the second preset pressure. Based on this, the second accumulator 2 can assist the pump station 200 in quickly moving the hydraulic support 100. The specific type of the second accumulator 2 can be set according to actual needs and is not limited to this. For example, the second accumulator 2 can be a bladder accumulator or a piston accumulator, preferably a piston accumulator, which can be installed at the base or shield beam of the hydraulic support 100, and the rated operating pressure is preferably ≥37.5MPa.

[0034] The second preset pressure is the minimum pressure required for the rack moving action.

[0035] The switching valve group 3 is used to control the on-off between the liquid exchange end of the first accumulator 1 and the liquid inlet end of the column, and between the liquid exchange end of the first accumulator 1 and the liquid outlet end of the pump station 200, and to control the on-off between the liquid exchange end of the second accumulator 2 and the liquid inlet end of the column, and between the liquid exchange end of the second accumulator 2 and the liquid outlet end of the pump station 200. The specific type of the switching valve group 3 can be set according to actual needs and is not limited to this.

[0036] The control module 4 is used to control the conduction state of the switching valve group 3. The specific type of the control module 4 can be set according to actual needs and is not limited to this. For example, the control module 4 can be a controller, a micro-control unit, etc.

[0037] like Figure 1As shown, in some embodiments, the switching valve assembly 3 includes: a first valve body 31 and a second valve body 32. The first end of the first valve body 31 is connected to the fluid exchange end of the first accumulator 1, and the second end of the first valve body 31 is disposed between the fluid inlet end of the column and the fluid outlet end of the pump station 200. The first end of the second valve body 32 is connected to the fluid exchange end of the second accumulator 2, and the second end of the second valve body 32 is disposed between the fluid inlet end of the column and the fluid outlet end of the pump station 200. The signal output end of the control module 4 is respectively connected to the signal input end of the first valve body 31 and the signal input end of the second valve body 32. The control module 4 is configured to control the first and second ends of the first valve body 31 to be conductive and the first and second ends of the second valve body 32 to be disconnected when the hydraulic support 100 is performing a pressure-maintaining action. Furthermore, when the hydraulic support 100 is performing a frame shifting action, the control module 4 is configured to control the first and second ends of the first valve body 31 to be disconnected and the first and second ends of the second valve body 32 to be conductive.

[0038] It can be understood that, since the signal output end of the control module 4 is connected to the signal input end of the first valve body 31 and the signal input end of the second valve body 32 respectively, the control module 4 can control the conduction state of the first valve body 31 and the second valve body 32, and since the first end of the first valve body 31 is connected to the liquid exchange end of the first accumulator 1, and the second end of the first valve body 31 is arranged between the liquid inlet end of the column and the liquid outlet end of the pump station 200, when the control module 4 controls the first end and the second end of the first valve body 31 to be conductive, the first valve body 31 and the second valve body 32 can be realized. The conduction between the fluid exchange end of the first accumulator 1 and the fluid inlet end of the column, as well as between the fluid exchange end of the first accumulator 1 and the fluid outlet end of the pump station 200, is achieved because the first end of the second valve body 32 is connected to the fluid exchange end of the second accumulator 2, and the second end of the second valve body 32 is arranged between the fluid inlet end of the column and the fluid outlet end of the pump station 200. When the control module 4 controls the first end and the second end of the second valve body 32 to be conductive, the conduction between the fluid exchange end of the second accumulator 2 and the fluid inlet end of the column, as well as between the fluid exchange end of the second accumulator 2 and the fluid outlet end of the pump station 200 can be achieved.

[0039] When the hydraulic support 100 performs a pressure maintaining action, the control module 4 controls the first end and the second end of the first valve body 31 to be connected, and controls the first end and the second end of the second valve body 32 to be disconnected, thereby utilizing the oil in the first accumulator 1 that is greater than the first preset pressure and cooperating with the pump station 200 to realize the pressure increase of the column, thereby meeting the high pressure and low flow pressure maintaining requirements of the hydraulic support 100, and, when the hydraulic support 100 performs a frame shifting action, controls the first end and the second end of the first valve body 31 to be disconnected, and controls the first end and the second end of the second valve body 32 to be connected, thereby utilizing the oil in the second accumulator 2 that is greater than the second preset pressure and cooperating with the pump station 200 to realize the column action, thereby meeting the high flow and low pressure frame shifting requirements of the hydraulic support 100.

[0040] It should be noted that the first valve body 31 is used to control the on-off between the liquid exchange end of the first accumulator 1 and the liquid inlet end of the column, and between the liquid exchange end of the first accumulator 1 and the liquid outlet end of the pump station 200. The specific type of the first valve body 31 can be set according to actual needs and is not limited to this. For example, the first valve body 31 can be a switch valve that only realizes the on-off function, or it can be a proportional valve that can realize opening adjustment. The rated flow rate (L / min) of the first valve body 31 is ≥ the rated volume (L) / 0.1 (min) of the first accumulator 1.

[0041] The second valve body 32 is used to control the on-off between the liquid exchange end of the second accumulator 2 and the liquid inlet end of the column, and between the liquid exchange end of the second accumulator 2 and the liquid outlet end of the pump station 200. The specific type of the second valve body 32 can be set according to actual needs and is not limited to this. For example, the second valve body 32 can be a switch valve that only realizes the on-off function, or it can be a proportional valve that can realize opening adjustment. The rated flow rate (L / min) of the second valve body 32 is ≥ the rated volume (L) / 0.1 (min) of the second accumulator 2.

[0042] The first valve body 31 is in a normally closed position by default, and the second valve body 32 is in a normally open position by default, that is, the second accumulator 2 used for fluid replenishment and speed-up is in a working state by default.

[0043] In some embodiments, the device further includes a first pressure detection unit, the detection end of which is disposed at the fluid exchange end of the first accumulator 1, and the first pressure detection unit is configured to detect the stored pressure of the first accumulator 1. The signal input end of the control module 4 is connected to the signal output end of the first pressure detection unit, and the control module 4 is configured to control the first and third ends of the switching valve group 3 to be conductive when the stored pressure of the first accumulator 1 is not greater than a first preset pressure and the hydraulic support 100 is not in operation.

[0044] It can be understood that since the detection end of the first pressure detection unit is arranged at the fluid exchange end of the first accumulator 1, and the signal input end of the control module 4 is connected to the signal output end of the first pressure detection unit, the first pressure detection unit can detect the storage pressure of the first accumulator 1 and send the pressure signal to the control module 4, so that when the storage pressure of the first accumulator 1 is not greater than the first preset pressure and the hydraulic support 100 is not in action, the control module 4 can control the first end and the third end of the switching valve group 3 to be connected, thereby realizing fluid replenishment of the first accumulator 1.

[0045] It should be noted that when the storage pressure of the first accumulator 1 is not greater than the first preset pressure, it means that the first accumulator 1 cannot achieve the effective pressure maintaining function due to insufficient pressure and needs to be replenished and pressurized. When the hydraulic support 100 is not in action, the liquid inlet end of the hydraulic support 100 is in a closed state. Therefore, the action gap between the pressure maintaining action and the frame moving action is utilized to realize the replenishment of the first accumulator 1, thereby ensuring the continuous and efficient operation of the hydraulic support 100.

[0046] The first pressure detection unit is used to detect the storage pressure of the first accumulator 1. The specific type of the first pressure detection unit can be set according to actual needs and is not limited to this. For example, the first pressure detection unit can be a pressure sensor.

[0047] In some embodiments, the device further includes a second pressure detection unit, the detection end of which is disposed at the fluid exchange end of the second accumulator 2, and the second pressure detection unit is configured to detect the stored pressure of the second accumulator 2. The signal input end of the control module 4 is connected to the signal output end of the second pressure detection unit, and the control module 4 is configured to control the second and third ends of the switching valve assembly 3 to be conductive when the stored pressure of the second accumulator 2 is not greater than a second preset pressure and the hydraulic support 100 is not in operation.

[0048] It can be understood that since the detection end of the second pressure detection unit is set at the fluid exchange end of the second accumulator 2, and the signal input end of the control module 4 is connected to the signal output end of the second pressure detection unit, the second pressure detection unit can detect the storage pressure of the second accumulator 2 and send the pressure signal to the control module 4, so that when the storage pressure of the second accumulator 2 is not greater than the second preset pressure and the hydraulic support 100 is not in action, the control module 4 can control the second end and the third end of the switching valve group 3 to be connected, thereby realizing fluid replenishment of the second accumulator 2.

[0049] It should be noted that when the storage pressure of the second accumulator 2 is not greater than the second preset pressure, it means that the second accumulator 2 cannot realize the effective frame moving function due to insufficient pressure, and needs to be replenished and pressurized. When the hydraulic support 100 is not in action, the liquid inlet end of the hydraulic support 100 is in a closed state. Therefore, the action gap between the pressure maintaining action and the frame moving action is utilized to realize the replenishment of the second accumulator 2, thereby ensuring the continuous and efficient operation of the hydraulic support 100.

[0050] The second pressure detection unit is used to detect the storage pressure of the second accumulator 2. The specific type of the second pressure detection unit can be set according to actual needs and is not limited to this. For example, the second pressure detection unit can be a pressure sensor.

[0051] In some embodiments, the device further includes a third pressure detection unit, the detection end of which is disposed within the column and configured to detect pressure within the column. The signal input end of the control module 4 is connected to the signal output end of the third pressure detection unit, and the control module 4 is configured to control the degree of conduction between the first and third ends of the switching valve assembly 3 based on the pressure within the column when the hydraulic support 100 is performing a pressure-maintaining operation.

[0052] It can be understood that since the detection end of the third pressure detection unit is set in the column, and the signal input end of the control module 4 is connected to the signal output end of the third pressure detection unit, the third pressure detection unit can detect the pressure of the column and send the pressure signal to the control module 4. Therefore, when the hydraulic support 100 performs the pressure maintaining action, the control module 4 can control the conduction opening of the first end and the third end of the switching valve group 3 according to the pressure of the column, thereby realizing efficient and accurate pressure maintenance of the hydraulic support 100.

[0053] It should be noted that the conduction opening of the first and third ends of the switching valve group 3 is controlled according to the pressure of the column, thereby effectively adjusting the degree of participation of the first accumulator 1 in the pressure maintaining action of the hydraulic support 100, thereby achieving precise control of the pressure maintaining efficiency and quality of the hydraulic support 100.

[0054] The third pressure detection unit is used to detect the pressure of the column. The specific type of the third pressure detection unit can be set according to actual needs and is not limited to this. For example, the third pressure detection unit can be a pressure sensor, and the third pressure detection unit is arranged in the hydraulic chamber of the column.

[0055] In some embodiments, the device further comprises a speed detection unit, wherein a detection end of the speed detection unit is disposed on the column, and the speed detection unit is configured to detect the movement speed of the column. The signal input end of the control module 4 is connected to the signal output end of the speed detection unit, and the control module 4 is configured to control the conduction opening of the second and third ends of the switching valve group 3 according to the movement speed of the column when the hydraulic support 100 is performing a frame shifting action.

[0056] It can be understood that since the detection end of the speed detection unit is set on the column, and the signal input end of the control module 4 is connected to the signal output end of the speed detection unit, the speed detection unit can detect the movement speed of the column and send the pressure signal to the control module 4. Therefore, when the hydraulic support 100 performs the frame moving action, the control module 4 can control the conduction opening of the second end and the third end of the switching valve group 3 according to the movement speed of the column, thereby realizing efficient and accurate frame moving of the hydraulic support 100.

[0057] It should be noted that the conduction opening of the second and third ends of the switching valve group 3 is controlled according to the movement speed of the column, thereby effectively adjusting the degree of participation of the second accumulator 2 in the hydraulic support 100 frame moving action, thereby achieving precise control of the hydraulic support 100 frame moving efficiency and quality.

[0058] The speed detection unit is used to detect the movement speed of the column. The specific type of the speed detection unit can be set according to actual needs and is not limited to this. For example, the speed detection unit can be a speed sensor, and the speed detection unit is arranged on the telescopic rod of the column.

[0059] In some embodiments, the control module 4 is used to control the first and second ends of the switching valve group 3 to be connected to the third end respectively when the hydraulic support 100 performs a frame moving action and the movement speed of the column is less than a preset speed, and when the hydraulic support 100 performs a pressure maintaining action after the frame moving action, the first and second ends of the switching valve group 3 are controlled to be disconnected from the third end respectively.

[0060] It can be understood that when the hydraulic support 100 performs a frame shifting action and the movement speed of the column is less than the preset speed, the control module 4 controls the first end and the second end of the switching valve group 3 to be connected to the third end respectively, thereby utilizing the cooperation of the first accumulator 1 and the second accumulator 2 to achieve full fluid replenishment and acceleration of the column, thereby ensuring the efficient frame shifting of the hydraulic support 100. At the same time, when the hydraulic support 100 performs a pressure maintaining action after the frame shifting action, the control module 4 controls the first end and the second end of the switching valve group 3 to be disconnected from the third end respectively, thereby avoiding the first accumulator 1 and the second accumulator 2 with insufficient pressure affecting the pressure maintaining efficiency of the hydraulic support 100.

[0061] It should be noted that when the hydraulic support 100 performs a frame shifting action and the movement speed of the column is less than the preset speed, the full force movement of the column is achieved by sacrificing the pressure maintaining function of the first accumulator 1 on the hydraulic support 100, thereby ensuring the efficient frame shifting of the hydraulic support 100.

[0062] In some embodiments, the signal input end of the control module 4 is connected to the signal output end of the sensor module in the hydraulic support 100, and the control module 4 is used to determine the operating state of the hydraulic support 100 according to the sensor signal of the sensor module.

[0063] It can be understood that since the signal input end of the control module 4 is connected to the signal output end of the sensor module in the hydraulic support 100, the control module 4 can judge the action state of the hydraulic support 100 according to the sensor signal of the sensor module, and then control the conduction state of the switching valve group 3 according to the action state of the hydraulic support 100.

[0064] like Figure 1As shown, in some embodiments, the device further includes: a one-way valve 5, which is disposed between the liquid inlet end of the column and the liquid outlet end of the pump station 200, with the liquid inlet end of the one-way valve 5 connected to the liquid outlet end of the pump station 200, and the liquid outlet end of the one-way valve 5 connected to the liquid inlet end of the column. The third end of the switching valve assembly 3 is disposed between the liquid outlet end of the one-way valve 5 and the liquid inlet end of the column.

[0065] It can be understood that since the liquid inlet end of the one-way valve 5 is connected to the liquid outlet end of the pump station 200, and the liquid outlet end of the one-way valve 5 is connected to the liquid inlet end of the column, the oil in the first accumulator 1 and the second accumulator 2 can be prevented from flowing back to the pump station 200 by the one-way valve 5, thereby ensuring the stable pressure maintenance and frame movement of the hydraulic support 100.

[0066] It should be noted that the one-way valve 5 is used for one-way communication between the liquid outlet of the pump station 200 and the liquid inlet of the column. The specific type of the one-way valve 5 can be set according to actual needs and is not limited to this.

[0067] The device of this embodiment is generally connected after the backwash filter valve of the liquid inlet pipe of the hydraulic support 100 in the hydraulic pipeline.

[0068] like Figure 2 As shown, the embodiment of the present disclosure further proposes a distributed energy storage system, including: a plurality of energy storage devices for the hydraulic support 100 columns as in the embodiment of the present disclosure.

[0069] It is understandable that when the hydraulic support 100 is performing a pressure-maintaining action, the control module 4 controls the first and third ends of the switching valve group 3 to be conductive, thereby utilizing the oil in the first accumulator 1 that is greater than the first preset pressure and cooperating with the pump station 200 to achieve the pressure increase of the column, thereby meeting the high-pressure and low-flow pressure-maintaining requirements of the hydraulic support 100, and, when the hydraulic support 100 is performing a frame shifting action, the second and third ends of the switching valve group 3 are controlled to be conductive, thereby utilizing the oil in the second accumulator 2 that is greater than the second preset pressure and cooperating with the pump station 200 to achieve the movement of the column, thereby meeting the high-flow and low-pressure frame shifting requirements of the hydraulic support 100. Thus, by switching the switching valve group 3 and cooperating between the first accumulator 1 and the second accumulator 2, the mutual influence between the pressure-maintaining stage of the hydraulic support 100 and the frame shifting stage of the hydraulic support 100 can be effectively reduced, thereby effectively improving the operating efficiency of the hydraulic support 100 and thereby ensuring rapid mining of the working face.

[0070] It should be noted that the distributed energy storage system corresponds to the distributed hydraulic supports 100 , and each hydraulic support 100 is configured with at least one set of energy storage devices of this embodiment.

[0071] In the description of the present disclosure, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In addition, in the description of the present disclosure, unless otherwise specified, the meaning of "plurality" is two or more.

[0072] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present disclosure includes additional implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present disclosure belong.

[0073] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0074] Although the embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are illustrative and are not to be construed as limitations on the present disclosure. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present disclosure.

Claims

1. An energy storage device for a hydraulic support column, characterized in that: include: a first accumulator, a second accumulator, a switching valve group, and a control module; wherein the stored pressure of the first accumulator is greater than a first preset pressure, the stored pressure of the second accumulator is greater than a second preset pressure, and the first preset pressure is greater than the second preset pressure; The first end of the switching valve group is connected to the liquid exchange end of the first accumulator, and the second end of the switching valve group is connected to the liquid exchange end of the second accumulator. The third end of the switching valve group is arranged between the liquid inlet end of the column and the liquid outlet end of the pump station; The signal output end of the control module is connected to the signal input end of the switching valve group, and the control module is used to control the first end and the third end of the switching valve group to be connected when the hydraulic support performs a pressure maintaining action, and to control the second end and the third end of the switching valve group to be connected when the hydraulic support performs a frame moving action.

2. The energy storage device for a hydraulic support column according to claim 1, characterized in that: The switching valve group includes: a first valve body, wherein a first end of the first valve body is connected to a liquid exchange end of the first accumulator, and a second end of the first valve body is disposed between a liquid inlet end of the column and a liquid outlet end of the pump station; a second valve body, wherein a first end of the second valve body is connected to a liquid exchange end of the second accumulator, and a second end of the second valve body is disposed between a liquid inlet end of the column and a liquid outlet end of the pump station; In which, the signal output end of the control module is connected to the signal input end of the first valve body and the signal input end of the second valve body respectively, and the control module is used to control the first end and the second end of the first valve body to be connected when the hydraulic support performs a pressure maintaining action, and control the first end and the second end of the second valve body to be disconnected, and control the first end and the second end of the second valve body to be connected when the hydraulic support performs a frame moving action.

3. The energy storage device for a hydraulic support column according to claim 1, characterized in that: The device further comprises: a first pressure detection unit, wherein a detection end of the first pressure detection unit is arranged at a fluid replacement end of the first accumulator, and the first pressure detection unit is used to detect the storage pressure of the first accumulator; In which, the signal input end of the control module is connected to the signal output end of the first pressure detection unit, and the control module is used to control the first end and the third end of the switching valve group to be connected when the storage pressure of the first accumulator is not greater than the first preset pressure and the hydraulic support is not in action.

4. The energy storage device for a hydraulic support column according to claim 1, characterized in that: The device further comprises: a second pressure detection unit, wherein a detection end of the second pressure detection unit is arranged at a fluid replacement end of the second accumulator, and the second pressure detection unit is used to detect the storage pressure of the second accumulator; In which, the signal input end of the control module is connected to the signal output end of the second pressure detection unit, and the control module is used to control the second end and the third end of the switching valve group to be connected when the storage pressure of the second accumulator is not greater than the second preset pressure and the hydraulic support is not in action.

5. The energy storage device for a hydraulic support column according to claim 1, characterized in that: The device further comprises: a third pressure detection unit, wherein a detection end of the third pressure detection unit is disposed in the column, and the third pressure detection unit is used to detect the pressure of the column; Among them, the signal input end of the control module is connected to the signal output end of the third pressure detection unit, and the control module is used to control the conduction opening of the first end and the third end of the switching valve group according to the pressure of the column when the hydraulic support performs a pressure maintaining action.

6. The energy storage device for a hydraulic support column according to claim 1, characterized in that: The device further comprises: a speed detection unit, wherein a detection end of the speed detection unit is disposed on the column, and the speed detection unit is used to detect the movement speed of the column; Among them, the signal input end of the control module is connected to the signal output end of the speed detection unit, and the control module is used to control the conduction opening of the second end and the third end of the switching valve group according to the movement speed of the column when the hydraulic support performs the frame moving action.

7. The energy storage device for a hydraulic support column according to claim 6, characterized in that: The control module is used to control the first end and the second end of the switching valve group to be connected to the third end respectively when the hydraulic support performs a frame moving action and the movement speed of the column is less than a preset speed, and to control the first end and the second end of the switching valve group to be disconnected from the third end respectively when the hydraulic support performs a pressure maintaining action after the frame moving action.

8. The energy storage device for a hydraulic support column according to claim 1, characterized in that: The signal input end of the control module is connected to the signal output end of the sensor module in the hydraulic support, and the control module is used to determine the action state of the hydraulic support according to the sensor signal of the sensor module.

9. The energy storage device for a hydraulic support column according to claim 1, characterized in that: The device further comprises: A one-way valve, the one-way valve being arranged between the liquid inlet end of the column and the liquid outlet end of the pump station, with the liquid inlet end of the one-way valve connected to the liquid outlet end of the pump station, and the liquid outlet end of the one-way valve connected to the liquid inlet end of the column; Wherein, the third end of the switching valve group is arranged between the liquid outlet end of the one-way valve and the liquid inlet end of the column.

10. A distributed energy storage system, characterized in that: include: A plurality of energy storage devices for hydraulic support columns according to any one of claims 1 to 9.

Images