Hydraulic adjusting device and hydraulic support liquid supply and return system and method

Abstract

The invention discloses a hydraulic adjusting device and a hydraulic support liquid supply and return system and method.The hydraulic adjusting device comprises a shell, a bag body, a liquid inlet and a liquid outlet, the shell is provided with a first cavity, the bag body is located in the first cavity to divide the first cavity into a first chamber and a second chamber, the liquid inlet and the liquid outlet are both formed in the shell, and the second chamber is located in the first cavity; the liquid inlet and the liquid outlet are both communicated with the first chamber, and fluid enters the first chamber through the liquid inlet and flows out of the liquid outlet. The hydraulic adjusting device further comprises a gas assembly, the gas assembly is connected with the second chamber, the gas assembly has a first working condition and a second working condition, under the first working condition, the gas assembly is used for conveying compressed gas into the second chamber to enable the bag body to expand, and under the second working condition, the gas assembly is used for discharging gas in the second chamber to enable the bag body to contract. According to the hydraulic adjusting device, liquid can be rapidly supplied or returned, and the rapid action of hydraulic equipment is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydraulic systems, and in particular relates to a hydraulic adjustment device, a hydraulic support fluid supply and return system and a method. Background Art

[0002] The coal mining working face mainly relies on hydraulic supports to effectively support the surrounding rock. The power source of the hydraulic support is the emulsion pump station. The emulsion pump station injects high-pressure emulsion into the hydraulic cylinder of the hydraulic support through the liquid supply pipeline, thereby driving the hydraulic support to complete related actions such as lifting the frame and pushing the cylinder; when the hydraulic support performs actions such as lowering the frame and pulling the frame, the emulsion is discharged back to the emulsion pump box through the return pipeline by contracting the hydraulic cylinder.

[0003] In the related technology, due to the limitations of the pipe diameter, supply and return fluid pressure, supply and return fluid flow rate, etc. of the emulsion pump station and hydraulic support connection pipeline, the lifting and lowering speeds of the hydraulic support of the coal mining working face are difficult to match the coal cutting speed requirements of the coal mining machine. In order to ensure stable control of the working face roof, the coal cutting speed of the coal mining machine can only be reduced, but this leads to a decrease in the output and efficiency of the working face. Summary of the invention

[0004] The present invention is based on the inventor's discovery and understanding of the following facts and problems:

[0005] The inventors realized that in the related art, an accumulator is installed on the liquid supply pipeline of the emulsion pump station to increase the liquid supply flow of the pipeline. However, due to the large size and low efficiency of the accumulator, the actual application effect on the engineering site is poor, and it is difficult to meet the requirements of fast and efficient frame movement at the coal mining face.

[0006] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0007] To this end, an embodiment of the present invention provides a hydraulic adjustment device that can improve the rapid action of hydraulic equipment.

[0008] The embodiment of the present invention further provides a hydraulic support fluid supply and return system.

[0009] The embodiment of the present invention further provides a hydraulic support fluid supply method.

[0010] The embodiment of the present invention further provides a hydraulic support liquid return method.

[0011] The hydraulic adjustment device according to the embodiment of the present invention comprises:

[0012] a housing having a first cavity;

[0013] a capsule, the capsule being located in the first cavity to separate the first cavity into a first chamber and a second chamber;

[0014] a liquid inlet and a liquid outlet, wherein the liquid inlet and the liquid outlet are both provided on the housing, and the liquid inlet and the liquid outlet are both connected to the first chamber, and the fluid enters the first chamber through the liquid inlet and flows out from the liquid outlet;

[0015] A gas component is connected to the second chamber, and the gas component has a first operating condition and a second operating condition. Under the first operating condition, the gas component is used to transport compressed gas into the second chamber to expand the sac, and under the second operating condition, the gas component is used to discharge the gas in the second chamber to shrink the sac.

[0016] The hydraulic regulating device of the embodiment of the present invention adjusts the gas pressure in the second chamber to quickly increase or reduce the space of the second chamber, thereby adjusting the fluid pressure in the first chamber, achieving rapid fluid supply or return, and improving the rapid action of the hydraulic equipment.

[0017] In some embodiments, it also includes a first valve and a second valve, the first valve is arranged at the liquid inlet, and the second valve is arranged at the liquid outlet, the first valve is used to prevent the fluid in the first chamber from flowing out of the liquid inlet, and the second valve is used to prevent the fluid from flowing into the first chamber from the liquid outlet.

[0018] In some embodiments, the housing has a second cavity, and a communication port is provided between the second cavity and the second chamber;

[0019] It also includes an exhaust port, the exhaust port is connected to the second chamber, and the gas component includes:

[0020] a third valve and a fourth valve, wherein the third valve is arranged at the communication port, and the fourth valve is arranged at the exhaust port;

[0021] A first pump is connected to the second chamber, and the first pump is used to pump gas into the second chamber.

[0022] In some embodiments, the shell has a third chamber, the third chamber is connected to the second chamber through the exhaust port, and the air inlet end of the first pump is connected to the third chamber, and the air outlet end of the first pump is connected to the second chamber.

[0023] The hydraulic support liquid supply and return system of the embodiment of the present invention comprises a liquid supply pipeline and a liquid return pipeline connected to the hydraulic support;

[0024] Also includes:

[0025] a first hydraulic regulating device and a second hydraulic regulating device, wherein the first hydraulic regulating device is arranged on the liquid supply pipeline, and the second hydraulic regulating device is arranged on the liquid return pipeline, and the first hydraulic regulating device and the second hydraulic regulating device are both hydraulic regulating devices according to any one of the above embodiments;

[0026] The first chamber in the first hydraulic regulating device is connected in series in the liquid supply pipeline, and the first chamber in the second hydraulic regulating device is connected in series in the liquid return pipeline.

[0027] In some embodiments, the housing in the first hydraulic adjustment device and the housing in the second hydraulic device are arranged side by side and connected together;

[0028] And / or, it also includes a control system, which is connected to the hydraulic support, the first hydraulic adjustment device and the second hydraulic adjustment device.

[0029] The hydraulic support fluid supply method of the embodiment of the present invention, wherein a first hydraulic regulating device is arranged on the fluid supply pipeline of the hydraulic support, and the first hydraulic regulating device is a hydraulic regulating device as described in any of the above embodiments, and the fluid supply method comprises the following steps:

[0030] exhausting the gas in the second chamber to shrink the bladder;

[0031] Prepare a gas source through the gas component, and make the gas pressure of the gas source greater than the pressure of the fluid flowing into the first chamber through the liquid inlet in the first hydraulic regulating device;

[0032] When it is necessary to supply liquid to the hydraulic support, the gas source and the second chamber are connected, and gas is transported into the second chamber to expand the bladder, so that the hydraulic support can move quickly.

[0033] In some embodiments, in the step of preparing the gas source by the gas component, the gas pressure of the gas source is 1 MPa to 1.5 MPa greater than the pressure of the fluid flowing into the first chamber through the liquid inlet of the first hydraulic regulating device;

[0034] And / or, the housing in the first hydraulic regulating device is provided with a second chamber, a third valve is provided between the second chamber and the second chamber, and air is inflated into the second chamber to form an air source in the second chamber.

[0035] The liquid return method of the hydraulic support of the embodiment of the present invention, wherein a second hydraulic regulating device is arranged on the liquid return pipeline of the hydraulic support, and the second hydraulic regulating device is a hydraulic regulating device as described in any of the above embodiments, and the liquid return method comprises the following steps:

[0036] Inflate the second chamber to expand the balloon, wherein the air pressure in the second chamber is greater than the fluid pressure in the first chamber;

[0037] The housing in the second hydraulic regulating device is provided with a third chamber, and a fourth valve is provided between the third chamber and the second chamber to evacuate the third chamber so that the air pressure in the third chamber is lower than the fluid pressure in the first chamber;

[0038] When the hydraulic support needs to return liquid, the third chamber and the second chamber are connected, and the gas in the second chamber is discharged to shrink the bladder, and the hydraulic support moves quickly.

[0039] In some embodiments, during the step of evacuating the third chamber, the air pressure in the third chamber is 1.5 MPa to 2.5 MPa lower than the fluid pressure in the first chamber;

[0040] Or, during the step of inflating the second chamber, the air pressure in the second chamber is 0.2 MPa to 0.7 MPa higher than the fluid pressure in the first chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic diagram of the three-dimensional structure of the hydraulic adjustment device according to an embodiment of the present invention.

[0042] Figure 2 It is a front view structural schematic diagram of a hydraulic regulating device according to an embodiment of the present invention.

[0043] Figure 3 It is a schematic cross-sectional structural diagram of a hydraulic regulating device according to an embodiment of the present invention.

[0044] Reference numerals:

[0045] 100. Hydraulic adjustment device;

[0046] 1. Shell; 11. First cavity; 111. First chamber; 112. Second chamber; 12. Second cavity; 13. Third cavity; 14. Liquid inlet; 15. Liquid outlet;

[0047] 2. Cyst;

[0048] 31, first valve; 32, second valve; 33, third valve; 34, fourth valve;

[0049] 4. First pump;

[0050] 51. Liquid supply pipeline; 52. Liquid return pipeline. DETAILED DESCRIPTION

[0051] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0052] like Figure 1-Figure 3 As shown, the hydraulic regulating device 100 of the embodiment of the present invention includes a housing 1, a bladder 2, a liquid inlet 14 and a liquid outlet 15. The housing 1 has a first cavity 11. The bladder 2 is located in the first cavity 11 to separate the first cavity 11 into a first chamber 111 and a second chamber 112. The liquid inlet 14 and the liquid outlet 15 are both opened on the housing 1, and the liquid inlet 14 and the liquid outlet 15 are both connected to the first chamber 111. The fluid enters the first chamber 111 through the liquid inlet 14 and flows out from the liquid outlet 15.

[0053] For example, when the hydraulic regulating device is arranged on the liquid supply pipeline 51, the first chamber 111 is connected in series to the liquid supply pipeline 51, and the fluid first flows into the first chamber 111 through the liquid supply pipeline 51 connected to the liquid inlet 14, and then flows out of the first chamber 111 through the liquid supply pipeline 51 connected to the liquid outlet 15, and is transported to hydraulic equipment such as hydraulic supports to realize liquid supply.

[0054] For another example, when the hydraulic regulating device 100 is arranged on the return liquid pipeline 52, the first chamber 111 is connected in series to the return liquid pipeline 52, and the fluid returning from the hydraulic equipment such as the hydraulic support first flows into the first chamber 111 through the return liquid pipeline 52 connected to the liquid inlet 14, and then flows out of the first chamber 111 through the return liquid pipeline 52 connected to the liquid outlet 15, and is transported to the liquid storage tank.

[0055] The hydraulic adjusting device 100 also includes a gas component, which is connected to the second chamber 112. The gas component has a first working condition and a second working condition. Under the first working condition, the gas component is used to transport compressed gas into the second chamber 112 to expand the bladder 2. Under the second working condition, the gas component is used to discharge the gas in the second chamber 112 to shrink the bladder 2.

[0056] The hydraulic regulating device of the embodiment of the present invention adjusts the gas pressure in the second chamber 112 to quickly increase or reduce the space of the second chamber 112, thereby adjusting the fluid pressure in the first chamber 111, achieving rapid fluid supply or return, and improving the rapid action of the hydraulic equipment.

[0057] For example, when the hydraulic regulating device is arranged in the liquid supply pipeline 51, the bladder 2 is in a contracted state, the space in the second chamber 112 is squeezed, and the first chamber 111 is filled with fluid. By delivering high-pressure gas to the second chamber 112, the bladder 2 expands, the volume of the second chamber 112 increases, and the volume of the first chamber 111 decreases and squeezes the fluid, thereby causing the fluid in the first chamber 111 to flow quickly to hydraulic equipment such as hydraulic supports, thereby increasing the speed of liquid supply.

[0058] For another example, when the hydraulic regulating device is arranged in the liquid return pipeline 52, the bladder 2 is in an expanded state, the space of the second chamber 112 is larger, and the space of the first chamber 111 is relatively small. By quickly releasing the gas in the second chamber 112, the bladder 2 shrinks and the space of the first chamber 111 increases, a negative pressure can be formed in the first chamber 111, thereby increasing the speed at which the fluid in hydraulic equipment such as hydraulic supports flows back to the first chamber 111, thereby achieving rapid liquid return.

[0059] In some embodiments, the hydraulic regulating device 100 also includes a first valve 31 and a second valve 32. The first valve 31 is arranged at the liquid inlet 14, and the second valve 32 is arranged at the liquid outlet 15. The first valve 31 is used to prevent the fluid in the first chamber 111 from flowing out of the liquid inlet 14, and the second valve 32 is used to prevent the fluid from flowing into the first chamber 111 from the liquid outlet 15.

[0060] The embodiment of the present invention can achieve unidirectional flow of the fluid through the arrangement of the first valve 31 and the second valve 32. That is, when the hydraulic regulating device is arranged in the liquid supply pipeline 51, the fluid in the first chamber 111 will only flow to the hydraulic equipment such as the hydraulic support, and will not flow out in the opposite direction from the liquid inlet 14. When the hydraulic regulating device is arranged in the liquid return pipeline 52, the fluid of the hydraulic support will flow from the hydraulic equipment such as the hydraulic support to the first chamber 111 through the liquid inlet 14, and the fluid will not flow into the first chamber 111 in the opposite direction from the liquid outlet 15.

[0061] Optionally, the first valve 31 and the second valve 32 are both one-way valves.

[0062] In some embodiments, the gas component can use an existing compressed air source to directly inflate the second chamber 112 to expand the sac 2 under a first working condition, and under a second working condition, the gas in the second chamber 112 can be discharged into the atmosphere to shrink the sac 2.

[0063] In some embodiments, the shell 1 has a second chamber 12, a connecting port is provided between the second chamber 12 and the second chamber 112, the hydraulic adjusting device also includes an exhaust port, the exhaust port is connected to the second chamber 112, the gas component includes a third valve 33, a fourth valve 34 and a first pump 4, the third valve 33 is provided at the connecting port, the fourth valve 34 is provided at the exhaust port, the first pump 4 is connected to the second chamber 12, and the first pump 4 is used to pump gas into the second chamber 12.

[0064] When the hydraulic regulating device 100 is arranged in the liquid supply pipeline 51, the third valve 33 is closed and the fourth valve 34 is opened to discharge the gas in the second chamber 112. After the sac 2 shrinks, the fourth valve 34 is closed and the second chamber 12 is inflated by the first pump 4, so that the second chamber 12 forms a high-pressure chamber. When the liquid supply speed of the liquid supply pipeline 51 needs to be increased (i.e., the first working condition), the third valve 33 is opened to connect the second chamber 12 and the second chamber 112, and the gas in the second chamber 12 flows into the second chamber 112. The sac 2 expands, and the fluid in the first chamber 111 is squeezed and quickly flows to the liquid outlet 15, thereby realizing the rapid action of hydraulic equipment such as hydraulic supports. For example, the speed of the hydraulic support during lifting and pushing can be increased.

[0065] When the hydraulic regulating device is arranged in the return liquid pipeline 52, the third valve 33 is opened and the fourth valve 34 is closed, and air is inflated into the second chamber 112. After the bladder 2 expands, the third valve 33 is closed. When it is necessary to increase the return liquid speed of the liquid supply pipeline 51 (i.e., the second working condition), the fourth valve 34 is opened to connect the second chamber 112 with the atmosphere, and the gas in the second chamber 112 is quickly discharged, the bladder 2 contracts, and a negative pressure is formed in the first chamber 111. The fluid at the liquid inlet 14 quickly flows into the first chamber 111, thereby realizing rapid movement of hydraulic equipment such as hydraulic supports. For example, the speed of the hydraulic support during actions such as lowering and pulling the support can be increased.

[0066] The first pump 4 is a high-pressure air pump.

[0067] Optionally, the third valve 33 and the fourth valve 34 are solenoid valves.

[0068] Furthermore, the housing 1 has a third chamber 13 , the third chamber 13 is connected to the second chamber 112 through an exhaust port, and the air inlet end of the first pump 4 is connected to the third chamber 13 , and the air outlet end of the first pump 4 is connected to the second chamber 12 .

[0069] It should be understood that by evacuating the third chamber 13, a certain pressure difference is formed between the pressure of the third chamber 13 and the air pressure in the second chamber 112. The embodiment of the present invention reasonably controls the pressure difference between the third chamber 13 and the second chamber 112 by forming a low-pressure or negative-pressure environment in the third chamber 13, thereby increasing the speed at which the fluid flows into the first chamber 111.

[0070] The first pump 4 of the embodiment of the present invention is arranged between the second chamber 12 and the third chamber 13. High-pressure gas can be delivered to the second chamber 12 by a pump, thereby creating a high-pressure environment in the second chamber 12, and at the same time, the gas in the third chamber 13 is discharged to create a low-pressure or negative-pressure environment in the third chamber 13.

[0071] like Figures 1 to 3As shown, the hydraulic support liquid supply and return system of an embodiment of the present invention includes a liquid supply pipeline 51 and a liquid return pipeline 52 connected to the hydraulic support. The liquid supply pipeline 51 is used to transport fluid medium to the hydraulic support so that the hydraulic support can perform actions such as lifting and pushing. The liquid return pipeline 52 is used to return the fluid medium in the hydraulic support so that the hydraulic support can perform actions such as lowering and pulling.

[0072] The hydraulic support fluid supply and return system also includes a first hydraulic regulating device and a second hydraulic regulating device. The first hydraulic regulating device is arranged on the fluid supply pipeline 51, and the second hydraulic regulating device is arranged on the fluid return pipeline 52. The first hydraulic regulating device and the second hydraulic regulating device are both hydraulic regulating devices 100 as in any of the above-mentioned embodiments; the first chamber 111 in the first hydraulic regulating device is connected in series in the fluid supply pipeline 51, and the first chamber 111 in the second hydraulic regulating device is connected in series in the fluid return pipeline 52.

[0073] In the embodiment of the present invention, hydraulic adjustment devices are arranged in the liquid supply pipeline 51 and the liquid return pipeline 52, so as to ensure that the hydraulic support can increase the movement speed in different actions, so that its movement speed matches the coal cutting speed of the coal mining machine, improves the support effect on the coal mining working face, and improves the coal mining efficiency and the safety of construction operations.

[0074] Further, the housing 1 in the first hydraulic regulating device and the housing 1 in the second hydraulic device are arranged side by side and connected together. It should be understood that the housing 1 in the first hydraulic regulating device and the housing 1 in the second hydraulic device are made in one piece, and different chambers are arranged in the one-piece made housing 1, and are respectively connected to the liquid supply pipeline 51 and the liquid return pipeline 52 to achieve the corresponding functions.

[0075] Of course, the housing 1 in the first hydraulic regulating device and the housing 1 in the second hydraulic regulating device can be arranged separately. The first hydraulic regulating device and the second hydraulic regulating device are two relatively independent devices, which are arranged on the liquid supply pipeline 51 and the liquid return pipeline 52 respectively.

[0076] Furthermore, the hydraulic support liquid supply and return system also includes a control system, which is connected to the hydraulic support, the first hydraulic adjustment device and the second hydraulic adjustment device. The control system can control the opening and closing of each valve and pump in the first hydraulic adjustment device and the second hydraulic adjustment device, as well as the opening time and closing time of the valve and the pump, so as to coordinate with the action of the hydraulic support.

[0077] In the hydraulic support fluid supply method of the embodiment of the present invention, a first hydraulic regulating device is arranged on the fluid supply pipeline of the hydraulic support, and the first hydraulic regulating device is a hydraulic regulating device as described in any of the above embodiments. The fluid supply method comprises the following steps:

[0078] S101, exhausting the gas in the second chamber to shrink the bladder.

[0079] Specifically, the third valve is closed and the fourth valve is opened. The gas in the second chamber can be actively pumped out, or the fluid pressure in the first chamber can be used to squeeze the gas in the second chamber out to shrink the capsule. At this time, the space in the second chamber is basically compressed, and then the fourth valve is closed.

[0080] S102, preparing a gas source through a gas component, and making the gas pressure of the gas source greater than the pressure of the fluid flowing into the first chamber through the liquid inlet in the first hydraulic regulating device.

[0081] Specifically, the gas source can be a compressed air source already available on site, and the gas source pressure meets the requirements. The gas source can also be a second cavity arranged on the shell, and the second cavity is inflated by the first pump so that the air pressure in the second cavity reaches the preset requirements.

[0082] When the housing in the first hydraulic regulating device is provided with a second cavity, a third valve is provided on the connecting port between the second cavity and the second chamber, and air is inflated into the second cavity to form an air source in the second cavity. The operating principle is the same as that described in the above embodiment, so it will not be repeated.

[0083] S103: When it is necessary to supply liquid to the hydraulic support, the gas source and the second chamber are connected, and gas is transported into the second chamber to expand the bladder, so that the hydraulic support moves quickly.

[0084] After the preliminary preparations are completed through S101 and S102, when the hydraulic support needs to perform actions such as lifting and pushing, the third valve is opened, and the high-pressure gas of the compressed air source enters the second chamber, or the compressed air in the second chamber enters the second chamber, the bladder expands, squeezing the fluid in the first chamber to flow quickly to the liquid outlet and enter the hydraulic support, thereby realizing actions such as rapid lifting and pushing.

[0085] In this process, the first hydraulic adjustment device achieves the effects of increasing pressure, expanding diameter and increasing capacity. In addition, in the embodiment of the present invention, even if the first hydraulic adjustment device is not used, it will not affect the normal liquid supply of the liquid supply pipeline. If the hydraulic support action speed does not need to be adjusted, the hydraulic support can be operated normally.

[0086] Furthermore, in the step of preparing an air source through the air component, the air pressure of the air source is 1 MPa to 1.5 MPa greater than the pressure of the fluid flowing into the first chamber through the liquid inlet in the first hydraulic regulating device.

[0087] Among them, the air pressure of the air source can be a supporting compressed air source on site, or a high-pressure chamber formed in the second chamber. The air pressure of the compressed air source or the air pressure in the high-pressure chamber is 1MPa, 1.2MPa, 1.26MPa, 1.33MPa, 1.4MPa or 1.5MPa higher than the fluid pressure flowing into the first chamber from the liquid inlet in the first hydraulic regulating device. When the pressure difference is less than 1MPa, it is easy to cause insufficient expansion of the bladder and fail to effectively improve the movement speed of the hydraulic support. When the pressure difference is greater than 1.5MPa, it is easy to cause the bladder to expand too quickly, causing a sudden change in fluid pressure and affecting the stability of the hydraulic support.

[0088] After the action is completed, steps S101 and S102 are repeated to prepare for the next fluid supply adjustment when the hydraulic support performs the next lifting, pushing and other actions.

[0089] In the liquid return method of the hydraulic support of the embodiment of the present invention, a second hydraulic regulating device is arranged on the liquid return pipeline of the hydraulic support, and the second hydraulic regulating device is a hydraulic regulating device as described in any of the above embodiments. The liquid return method comprises the following steps:

[0090] S201, inflate the second chamber to expand the bladder, the air pressure in the second chamber being greater than the fluid pressure in the first chamber.

[0091] Specifically, the third valve is opened, the fourth valve is closed, and air is inflated into the second chamber to expand the bladder, the space for the fluid in the first chamber is compressed, and then the third valve is closed. At this time, the liquid return pipeline can still return liquid normally.

[0092] S202. The shell of the second hydraulic regulating device is provided with a third chamber, and a fourth valve is provided between the third chamber and the second chamber. The third chamber is evacuated so that the air pressure in the third chamber is lower than the fluid pressure in the first chamber.

[0093] It should be understood that when the atmospheric pressure can meet the requirements, the third chamber can be directly connected to the atmosphere. When a lower air pressure is required, the third chamber needs to be evacuated by an air pump to create a low pressure or negative pressure environment in the third chamber.

[0094] S203, when the hydraulic support needs to return liquid, the third chamber and the second chamber are connected, and the gas in the second chamber is discharged to shrink the bladder, and the hydraulic support moves quickly.

[0095] After completing the preparation work through steps S201 and S202, when the hydraulic support needs to perform actions such as lowering the support or pulling the support, the fourth valve between the third chamber and the second chamber is turned on, the gas in the second chamber flows out quickly, and the bladder shrinks. At this time, the space in the first chamber increases and forms a negative pressure environment, and the fluid in the hydraulic support will flow quickly into the first chamber, thereby increasing the movement speed of the hydraulic support.

[0096] Furthermore, in the step of evacuating the third chamber, the air pressure in the third chamber is 1.5MPa to 2.5MPa lower than the fluid pressure in the first chamber. In the step of filling the second chamber, the air pressure in the second chamber is 0.2MPa to 0.7MPa higher than the fluid pressure in the first chamber.

[0097] It should be understood that in the step of evacuating the third chamber, the air pressure in the third chamber is 1.5MPa, 1.7MPa, 1.85MPa, 2.1MPa, 2.36MPa, 2.4MPa or 2.5MPa lower than the fluid pressure in the first chamber, and in the step of inflating the second chamber, the air pressure in the second chamber is 0.2MPa, 0.25MPa, 0.3MPa, 0.36MPa, 0.5MPa or 0.7Mpa higher than the fluid pressure in the first chamber.

[0098] When the difference between the air pressure of the third chamber and the fluid pressure of the first chamber is less than 1.5MPa, the difference is likely to be too small, and the balloon cannot be fully contracted. The volume of the second chamber will still be large, affecting the liquid return effect. When the difference between the air pressure of the third chamber and the fluid pressure of the first chamber is greater than 2.5MPa, the balloon cannot produce better effects after full contraction. Instead, it has higher requirements on the sealing performance and air pressure of the third chamber, which is not practical.

[0099] When the difference between the air pressure in the second chamber and the fluid pressure in the first chamber is less than 0.2MPa, the bladder may not be able to fully expand to the maximum when the fluid pressure floats. When the difference between the air pressure in the second chamber and the fluid pressure in the first chamber is greater than 0.7MPa, the pressure difference between the second chamber and the third chamber may be too small, which may easily lead to the bladder failing to fully shrink and affecting the liquid return effect.

[0100] In the embodiment of the present invention, the air pressure of the third chamber is lower than the air pressure of the second chamber, and can meet the purpose of rapid discharge of the gas in the second chamber, thereby improving the movement speed of the hydraulic support when performing actions such as lowering and pulling the support.

[0101] After the action is completed, steps S201 and S202 are repeated to prepare for the next return liquid adjustment when the hydraulic support performs the next lowering, pulling and other actions.

[0102] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0103] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0104] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0105] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0106] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0107] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A hydraulic adjustment device, characterized in that: include: a housing having a first cavity; a capsule, the capsule being located in the first cavity to separate the first cavity into a first chamber and a second chamber; a liquid inlet and a liquid outlet, wherein the liquid inlet and the liquid outlet are both provided on the housing, and the liquid inlet and the liquid outlet are both connected to the first chamber, and the fluid enters the first chamber through the liquid inlet and flows out from the liquid outlet; A gas component is connected to the second chamber, and the gas component has a first operating condition and a second operating condition. Under the first operating condition, the gas component is used to transport compressed gas into the second chamber to expand the sac, and under the second operating condition, the gas component is used to discharge the gas in the second chamber to shrink the sac.

2. The hydraulic adjustment device according to claim 1, characterized in that: It also includes a first valve and a second valve, wherein the first valve is arranged at the liquid inlet, and the second valve is arranged at the liquid outlet, the first valve is used to prevent the fluid in the first chamber from flowing out of the liquid inlet, and the second valve is used to prevent the fluid from flowing into the first chamber from the liquid outlet.

3. The hydraulic adjustment device according to claim 1, characterized in that: The housing has a second cavity, and a communication port is provided between the second cavity and the second chamber; It also includes an exhaust port, the exhaust port is connected to the second chamber, and the gas component includes: a third valve and a fourth valve, wherein the third valve is arranged at the communication port, and the fourth valve is arranged at the exhaust port; A first pump is connected to the second chamber, and the first pump is used to pump gas into the second chamber.

4. The hydraulic adjustment device according to claim 3, characterized in that: The housing has a third chamber, the third chamber is communicated with the second chamber through the exhaust port, the air inlet of the first pump is communicated with the third chamber, and the air outlet of the first pump is communicated with the second chamber.

5. A hydraulic support fluid supply and return system, characterized in that: It includes a liquid supply pipeline and a liquid return pipeline connected to the hydraulic support; Also includes: a first hydraulic regulating device and a second hydraulic regulating device, wherein the first hydraulic regulating device is arranged on the liquid supply pipeline, and the second hydraulic regulating device is arranged on the liquid return pipeline, and the first hydraulic regulating device and the second hydraulic regulating device are both hydraulic regulating devices according to any one of claims 1 to 4; The first chamber in the first hydraulic regulating device is connected in series in the liquid supply pipeline, and the first chamber in the second hydraulic regulating device is connected in series in the liquid return pipeline.

6. The hydraulic support fluid supply and return system according to claim 5, characterized in that: The housing in the first hydraulic adjustment device and the housing in the second hydraulic device are arranged side by side and connected together; And / or, it also includes a control system, which is connected to the hydraulic support, the first hydraulic adjustment device and the second hydraulic adjustment device.

7. A method for supplying fluid to a hydraulic support, characterized in that: A first hydraulic regulating device is arranged on the liquid supply pipeline of the hydraulic support, and the first hydraulic regulating device is a hydraulic regulating device as claimed in any one of claims 1 to 4. The liquid supply method comprises the following steps: exhausting the gas in the second chamber to shrink the bladder; Prepare a gas source through the gas component, and make the gas pressure of the gas source greater than the pressure of the fluid flowing into the first chamber through the liquid inlet in the first hydraulic regulating device; When it is necessary to supply liquid to the hydraulic support, the gas source and the second chamber are connected, and gas is transported into the second chamber to expand the bladder, so that the hydraulic support can move quickly.

8. The hydraulic support fluid supply method according to claim 7, characterized in that: The step is to prepare a gas source through the gas component, wherein the gas pressure of the gas source is 1 MPa to 1.5 MPa greater than the pressure of the fluid flowing into the first chamber through the liquid inlet of the first hydraulic regulating device; And / or, the housing in the first hydraulic regulating device is provided with a second chamber, a third valve is provided between the second chamber and the second chamber, and air is inflated into the second chamber to form an air source in the second chamber.

9. A method for returning liquid to a hydraulic support, characterized in that: A second hydraulic regulating device is arranged on the liquid return pipeline of the hydraulic support, and the second hydraulic regulating device is a hydraulic regulating device as claimed in any one of claims 1 to 4. The liquid return method comprises the following steps: Inflate the second chamber to expand the balloon, wherein the air pressure in the second chamber is greater than the fluid pressure in the first chamber; The housing in the second hydraulic regulating device is provided with a third chamber, and a fourth valve is provided between the third chamber and the second chamber to evacuate the third chamber so that the air pressure in the third chamber is lower than the fluid pressure in the first chamber; When the hydraulic support needs to return liquid, the third chamber and the second chamber are connected, and the gas in the second chamber is discharged to shrink the bladder, and the hydraulic support moves quickly.

10. The method for returning liquid to a hydraulic support according to claim 9, characterized in that: In the step of evacuating the third chamber, the air pressure in the third chamber is 1.5 MPa to 2.5 MPa lower than the fluid pressure in the first chamber; Or, during the step of inflating the second chamber, the air pressure in the second chamber is 0.2 MPa to 0.7 MPa higher than the fluid pressure in the first chamber.

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