Active pressure-boosting energy storage device, distributed hydraulic source and dual-source liquid supply system

Abstract

The present application relates to the technical field of hydraulic support liquid supply, in particular to an active pressurization type energy storage device, a distributed hydraulic source and a dual-source liquid supply system, which mainly solves the technical problems of insufficient transient large-flow supply, frequent pump station start-stop and large system energy loss of the existing hydraulic support liquid supply system. The cylinder body of the device is fixed with a ring-shaped partition plate and an elastic diaphragm. The pressurization piston assembly includes a piston rod, an upper piston head and a lower piston head. The first liquid cavity is formed between the upper piston head and the top end of the cylinder body. The second liquid cavity is formed between the upper piston head and the ring-shaped partition plate. The first gas cavity is formed between the lower piston head and the ring-shaped partition plate. The second gas cavity is formed between the lower piston head and the elastic diaphragm. The liquid storage cavity is formed between the elastic diaphragm and the bottom end of the cylinder body. The device can meet the demand of transient large-flow of the hydraulic support, compensate for the fluctuation of liquid pressure, reduce the number of pump station start-stop, reduce the transient peak flow demand of the pump station, and reduce the energy loss of the pump station system.

Description

Technical Field

[0001] This invention relates to the field of hydraulic support fluid supply technology, and in particular to an active booster type energy storage device, a distributed hydraulic source, and a dual-source fluid supply system. Background Technology

[0002] Hydraulic supports are the core support equipment for underground fully mechanized coal mining faces, and their support, movement, and pushing operations all depend on the supply of hydraulic fluid.

[0003] Currently, the hydraulic support system typically relies on fixed pump stations arranged along the roadway to deliver emulsion to multiple hydraulic supports at the working face via supply pipelines exceeding 1500 meters in length. This method has the following drawbacks:

[0004] Firstly, in terms of load transient response, the processes of moving the support group, lowering the column, and raising the bottom often require short-term peak flow. However, due to the significant liquid capacity effect of the long-distance liquid supply pipeline, the supply end is insufficient during the support operation, resulting in large-scale pressure fluctuations when the electro-hydraulic valve of the hydraulic support is opened and closed, and the fluctuations last for a long time. This causes problems such as slow support operation, low support efficiency, and great safety hazards. At the same time, the unstable flow supply makes it difficult to coordinate the pump-valve of the support group in the fully mechanized mining face, which seriously restricts the progress of intelligent mining.

[0005] Secondly, in terms of hydraulic power source operation, pump stations are usually equipped with multiple fixed displacement pumps and variable displacement pumps driven by industrial frequency motors for flow output. Their continuous output characteristics are seriously mismatched with the intermittent and pulsed flow demand of the support group. When the flow demand at the load end is large, the system pressure drops sharply, triggering the pump station to operate under overload. When the flow demand at the load end is small, the pump station generates high pressure overflow due to flow redundancy. This leads to the pump station needing to start and stop frequently, causing system pressure shocks and component wear.

[0006] Thirdly, regarding energy loss, according to the theoretical formula for pressure loss in long-distance pipelines ( Δp = kq 2 Pipeline pressure loss Δp With flow q It exhibits a flat growth pattern, with instantaneous peak flow leading to significant energy loss.

[0007] Therefore, there is an urgent need for a hydraulic support fluid supply system that can achieve stable supply of transient large flow rates, reduce the number of pump station start-ups and shutdowns, and reduce system energy loss. Summary of the Invention

[0008] To overcome the technical defects of existing hydraulic support fluid supply systems, such as insufficient transient high-flow supply, frequent pump station start-up and shutdown, and large system energy loss, this invention provides an active booster energy storage device, a distributed hydraulic source, and a dual-source fluid supply system.

[0009] The active booster energy storage device provided by the present invention includes:

[0010] A cylinder body with its axis arranged vertically, an annular partition and an elastic diaphragm are fixed inside the cylinder body, and the annular partition is located above the elastic diaphragm;

[0011] A booster piston assembly includes a piston rod, which is coaxially arranged with the cylinder and slidably sealed in the annular partition. The piston rod has an upper piston head at its top end and a lower piston head at its bottom end.

[0012] A first liquid chamber is formed between the upper piston head and the top of the cylinder body, and a second liquid chamber is formed between the upper piston head and the annular partition. Both the first and second liquid chambers are provided with control fluid interfaces. A first air chamber is formed between the lower piston head and the annular partition, and the first air chamber is kept in communication with the outside. A second air chamber is formed between the lower piston head and the elastic diaphragm, and the second air chamber is provided with control air interfaces. A liquid storage chamber is formed between the elastic diaphragm and the bottom of the cylinder body, and the liquid storage chamber is provided with working fluid interfaces.

[0013] Optionally, the cylinder body includes a top cylinder, a middle cylinder, and a bottom cylinder arranged sequentially from top to bottom. The annular partition is located between the top cylinder and the bottom cylinder. The annular partition has a connecting hole to keep the first air chamber connected to the outside. A connecting ring plate is provided between the middle cylinder and the bottom cylinder. The connecting ring plate has the control air interface. The elastic diaphragm is located inside the bottom cylinder.

[0014] Optionally, the inner wall of the bottom cylinder is provided with an annular groove, and the edge of the elastic diaphragm is engaged in the annular groove and fixed by a clamping ring fixed to the inner wall of the bottom cylinder.

[0015] Optionally, the edge of the elastic diaphragm is provided with a circular protrusion, which is exposed outside the annular groove. The cross-section of the clamping ring is S-shaped, the top of the clamping ring is fixed to the inner wall of the bottom cylinder, and the bottom of the clamping ring wraps around and presses the protrusion.

[0016] Optionally, the edge of the annular partition has an upper positioning cylinder protruding upward for fitting into the inner side of the top cylinder, and the edge of the annular partition has a lower positioning cylinder protruding downward for fitting into the inner side of the middle cylinder.

[0017] Optionally, the area of ​​the upper piston head is larger than the area of ​​the lower piston head.

[0018] Optionally, the inner wall of the annular partition is provided with a guide ring and a sealing ring, and the piston rod is inserted into the guide ring and the sealing ring.

[0019] The distributed hydraulic power source provided by this invention includes:

[0020] The aforementioned active booster energy storage device;

[0021] The first hydraulic two-way lock has two working oil ports that are respectively connected to the control fluid interface of the first liquid chamber and the control fluid interface of the second liquid chamber.

[0022] The first two-position three-way hydraulic valve is provided in two, and the working oil ports of the two first two-position three-way hydraulic valves are respectively connected to the two control oil ports of the first hydraulic bidirectional lock.

[0023] Two two-position two-way hydraulic valves are provided, and the pressure oil ports of both two two-position two-way hydraulic valves are connected to the working fluid interface. The working oil ports of both two two-position two-way hydraulic valves are connected to the oil outlet pipeline, and a first check valve is connected in series in the oil outlet pipeline.

[0024] The working fluid interface is also connected to an inlet pipe, and a second one-way valve is connected in series in the inlet pipe.

[0025] The dual-source liquid supply system provided by this invention includes:

[0026] The pump station's hydraulic power source is equipped with a pressure oil circuit and a return oil circuit;

[0027] Hydraulic supports, which are provided in multiple units;

[0028] The second hydraulic two-way lock is provided in multiple forms, each corresponding to a hydraulic support. The two working ports of the second hydraulic two-way lock are respectively connected to the rod-side chamber and the rodless chamber of the corresponding hydraulic support.

[0029] The aforementioned distributed hydraulic power source has multiple components, each corresponding to a second hydraulic bidirectional lock. The pressure port of the first two-position three-way hydraulic valve is connected to the pressure oil circuit, the return port of the first two-position three-way hydraulic valve is connected to the return oil circuit, and the two oil outlet lines are respectively connected to the two control oil ports of the corresponding second hydraulic bidirectional lock.

[0030] The control valve group has multiple valves, each corresponding to a distributed hydraulic source. The control valve group includes two sets of sub-valve groups. Each set of sub-valve groups includes a second two-position three-way hydraulic valve and a third two-position three-way hydraulic valve connected to each other. The pressure port of the second two-position three-way hydraulic valve is connected to the pressure oil circuit, and the return port of the second two-position three-way hydraulic valve is connected to the return oil circuit. The working port of the second two-position three-way hydraulic valve is connected to the pressure port of the same set of third two-position three-way hydraulic valves. The working ports of the two sets of third two-position three-way hydraulic valves are respectively connected to the two control ports of the corresponding second hydraulic bidirectional lock. The return ports of the two sets of third two-position three-way hydraulic valves are both connected to the inlet pipeline of the next adjacent distributed hydraulic source.

[0031] Optionally, the inlet pipeline of the first-end distributed hydraulic power source is connected to the pressure oil circuit, and the return ports of the two sets of third two-position three-way hydraulic valves of the end control valve group are both connected to the return oil circuit.

[0032] The technical solution provided by this invention has the following advantages compared with the prior art:

[0033] The active booster-type energy storage device provided by this invention can change the position of the booster piston assembly by varying the relative pressure between the first and second liquid chambers, thereby causing a pressure change in the second gas chamber. This, in turn, causes deformation of the elastic diaphragm, ultimately enabling liquid inlet or supply to the storage chamber. This device can work in conjunction with the hydraulic power source of a pump station to provide additional fluid to the hydraulic support during short-term peak flow demands, meeting its instantaneous high flow requirements. Simultaneously, this device can compensate for fluctuations in liquid pressure, reducing the number of pump station start-ups and shutdowns, and also reducing the instantaneous peak flow demand of the pump station, thus minimizing energy loss in the pump station system.

[0034] The distributed hydraulic power source and dual-source fluid supply system provided by the present invention have the aforementioned advantages because they contain the aforementioned active booster energy storage device. Attached Figure Description

[0035] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the structure of the active booster energy storage device in an embodiment of the present invention;

[0038] Figure 2 express Figure 1 A magnified view of a section at point A in the middle;

[0039] Figure 3 express Figure 1 A magnified view of a section at point B in the middle;

[0040] Figure 4 This diagram illustrates the state transition of the active booster energy storage device in an embodiment of the present invention.

[0041] Figure 5 This is a schematic diagram of the structure of the distributed hydraulic source in an embodiment of the present invention;

[0042] Figure 6 This is a schematic diagram of the dual-source liquid supply system in an embodiment of the present invention;

[0043] Figure 7 This diagram illustrates the normal position of the support in the dual-source liquid supply system according to an embodiment of the present invention.

[0044] Figure 8 This is a schematic diagram showing the support frame lifting state of the dual-source liquid supply system in an embodiment of the present invention.

[0045] Figure 9 This is a schematic diagram showing the lowered state of the support frame of the dual-source liquid supply system in an embodiment of the present invention.

[0046] In the picture:

[0047] 1. Annular partition; 2. Elastic diaphragm; 3. Piston rod; 4. Upper piston head; 5. Lower piston head; 6. First liquid chamber; 7. Second liquid chamber; 8. Control fluid interface; 9. First gas chamber; 10. Second gas chamber; 11. Control gas interface; 12. Liquid storage chamber; 13. Working fluid interface; 14. Top cylinder; 15. Middle cylinder; 16. Bottom cylinder; 17. Connecting hole; 18. Connecting ring plate; 19. Annular groove; 20. Pressing ring; 21. Protrusion; 2 2. Upper positioning cylinder; 23. Lower positioning cylinder; 24. Guide ring; 25. Sealing ring; 26. First hydraulic two-way lock; 27. First two-position three-way hydraulic valve; 28. Two-position two-way hydraulic valve; 29. ​​First check valve; 30. Inlet pipeline; 31. Second check valve; 32. Pump station hydraulic power source; 33. Hydraulic support; 34. Second hydraulic two-way lock; 35. Second two-position three-way hydraulic valve; 36. Third two-position three-way hydraulic valve; 37. Outlet pipeline. Detailed Implementation

[0048] To better understand the above-mentioned objectives, features, and advantages of the present invention, the solutions of the present invention will be further described below. It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other.

[0049] In this description, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. It should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joint" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0050] Many specific details are set forth in the following description in order to provide a full understanding of the invention, but the invention may also be practiced in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the invention, and not all embodiments.

[0051] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Example 1

[0052] Reference Figures 1 to 4 This embodiment provides an active booster-type energy storage device, including a cylinder and a booster piston assembly. The cylinder is vertically oriented, and an annular partition 1 and an elastic diaphragm 2 are fixed inside the cylinder, with the annular partition 1 located above the elastic diaphragm 2. The booster piston assembly includes a piston rod 3, which is coaxially arranged with the cylinder and slidably and sealed within the annular partition 1. The piston rod 3 has an upper piston head 4 at its top and a lower piston head 5 at its bottom. A first liquid chamber 6 is formed between the upper piston head 4 and the top of the cylinder, and a second liquid chamber 7 is formed between the upper piston head 4 and the annular partition 1. Both the first liquid chamber 6 and the second liquid chamber 7 are provided with control fluid interfaces 8. A first air chamber 9 is formed between the lower piston head 5 and the annular partition 1, and the first air chamber 9 is kept in communication with the outside. A second air chamber 10 is formed between the lower piston head 5 and the elastic diaphragm 2, and the second air chamber 10 is provided with a control air interface 11. A liquid storage chamber 12 is formed between the elastic diaphragm 2 and the bottom of the cylinder, and the liquid storage chamber 12 is provided with a working fluid interface 13.

[0053] Specifically, the cylinder body of this embodiment includes a top cylinder 14, a middle cylinder 15, and a bottom cylinder 16 arranged sequentially from top to bottom. An annular partition 1 is located between the top cylinder 14 and the bottom cylinder 16. The annular partition 1 has a connecting hole 17 to keep the first air chamber 9 connected to the outside. A connecting ring plate 18 is provided between the middle cylinder 15 and the bottom cylinder 16. The connecting ring plate 18 has a control air interface 11. An elastic diaphragm 2 is located inside the bottom cylinder 16. The cylinder body adopts a structure assembled from the top cylinder 14, the middle cylinder 15, and the bottom cylinder 16, which makes processing and installation more convenient. By setting the connecting hole 17 inside the annular partition 1, even when the lower piston head 5 runs to the upper limit position of contacting the annular partition 1, the first air chamber 9 can still be connected to the outside through the connecting hole 17, thus eliminating the stroke restriction of the connecting hole 17 on the lower piston head 5. The connecting ring plate 18 can be designed to correspond to the lower limit position of the lower piston head 5 to eliminate the stroke restriction of the control air interface 11 on the lower piston head 5. In other embodiments, the cylinder block may also adopt an integral structure or other commonly used splicing structure.

[0054] The material of the elastic diaphragm 2 is not limited; for example, it can be pressure-resistant and corrosion-resistant rubber or polyurethane.

[0055] The fixing structure of the elastic diaphragm 2 within the bottom cylinder 16 is not limited. For example, in this embodiment, the inner wall of the bottom cylinder 16 is provided with an annular groove 19. The edge of the elastic diaphragm 2 is engaged within the annular groove 19 and fixed by a clamping ring 20 fixed to the inner wall of the bottom cylinder 16. The cooperation between the annular groove 19 and the clamping ring 20 ensures the reliable fixing of the elastic diaphragm 2.

[0056] As a further improvement to the fixing structure of the elastic diaphragm 2, the edge of the elastic diaphragm 2 is provided with a circular cross-section protrusion 21, which protrudes out of the annular groove 19. The clamping ring 20 has an S-shaped cross-section, with its top fixed to the inner wall of the bottom cylinder 16 and its bottom wrapping around and clamping the protrusion 21. The S-shaped clamping ring 20 can generate elastic deformation under pressure, wrapping the protrusion 21 more tightly, which can further improve the reliability of the elastic diaphragm 2 fixing, and at the same time ensure the sealing between the elastic diaphragm 2 and the inner wall of the bottom cylinder 16. The clamping ring 20 is preferably made of a flexible material such as silicone to generate more significant elastic deformation under pressure.

[0057] As a further improvement to the annular partition 1, the edge of the annular partition 1 has an upper positioning cylinder 22 protruding upward for fitting inside the top cylinder 14, and a lower positioning cylinder 23 protruding downward for fitting inside the middle cylinder 15. During installation, the top cylinder 14 only needs to be fitted onto the upper positioning cylinder 22, and the middle cylinder 15 onto the lower positioning cylinder 23, to connect the top cylinder 14, the annular partition 1, and the middle cylinder 15 into an integrated structure, making assembly simpler.

[0058] As a further improvement to the connecting hole 17, a filter element is provided at the end of the connecting hole 17 to prevent external dust from entering the first air chamber 9.

[0059] Specifically, in this embodiment, the inner wall of the annular partition 1 is provided with a guide ring 24 and a sealing ring 25, and the piston rod 3 is inserted into the guide ring 24 and the sealing ring 25. The guide ring 24 is used to ensure the accuracy of the axial movement of the piston rod 3, and is preferably made of polytetrafluoroethylene, which has advantages such as high temperature resistance, low friction, and corrosion resistance; the sealing ring 25 is used to ensure the sealing between the piston rod 3 and the annular partition 1, and a common O-ring seal can be used. The number and position of the guide ring 24 and the sealing ring 25 are not limited. For example, in this embodiment, there are two guide rings 24 and one sealing ring 25. The two guide rings 24 are located on both sides of the axial direction of the sealing ring 25, and the piston rod 3 is limited by the two guide rings 24, which can better ensure the accuracy of the axial movement of the piston rod 3.

[0060] Specifically, in this embodiment, the area of ​​the upper piston head 4 is larger than the area of ​​the lower piston head 5. Under the same pressure, the lower piston head 5 is designed to have a relatively smaller area, based on the relationship between pressure, force, and area, so as to output greater pressure and thus facilitate the deformation of the elastic diaphragm 2.

[0061] It is easy to understand that the control fluid interface 8 is used to fill the first liquid chamber 6 or the second liquid chamber 7 with control fluid or to discharge the control fluid from the first liquid chamber 6 or the second liquid chamber 7, and a quick-connect interface is preferred; the control gas interface 11 is used to fill or replenish the second gas chamber 10 with gas; and the working fluid interface 13 is used to fill the liquid storage chamber 12 with working fluid or to discharge the working fluid from the liquid storage chamber 12.

[0062] It should be noted that the first liquid chamber 6, the second liquid chamber 7, and the second gas chamber 10 are all sealed cavities. The first liquid chamber 6 and the second liquid chamber 7 are filled with control liquid, and the second gas chamber 10 is filled with inert gas. The first gas chamber 9 is kept in communication with the outside world so as to decouple the forces on the upper piston head 4 and the lower piston head 5, thereby enabling the booster piston assembly to move in both directions and meet the functional requirements of the booster piston assembly.

[0063] The working principle of the active booster energy storage device in this embodiment is as follows:

[0064] Figure 4 The left side shows the low-pressure energy storage state of the active booster type energy storage device. In this state, the control fluid is injected into the second liquid chamber 7 and the control fluid is discharged from the first liquid chamber 6, which causes the booster piston assembly to be subjected to an upward force, which drives the lower piston head 5 to move upward. The upward movement of the lower piston head 5 causes the pressure in the second gas chamber 10 to decrease, which causes the elastic diaphragm 2 to contract upward, thereby causing the pressure in the storage chamber 12 to decrease, and the working fluid enters the storage chamber 12. Figure 4 The middle section shows the active boosting state of the active boosting energy storage device. In this state, the first liquid chamber 6 is injected with control fluid while the second liquid chamber 7 is discharged from the control fluid, which causes the boosting piston assembly to be subjected to a downward force, driving the lower piston head 5 to move downward. The downward movement of the lower piston head 5 causes the pressure in the second gas chamber 10 to increase, thereby causing the elastic diaphragm 2 to expand downward, which in turn causes the pressure in the storage chamber 12 to gradually increase. Figure 4 The right side shows the high-pressure release state of the active booster type energy storage device. In this state, the booster piston assembly continues to move downward to maintain the pressure of the liquid storage chamber 12, and the working fluid is discharged from the liquid storage chamber 12 through the working fluid interface 13 for liquid supply. Example 2

[0065] Reference Figure 5The distributed hydraulic power source provided by the present invention includes an active booster type energy storage device, a first hydraulic bidirectional lock 26, a first two-position three-way hydraulic valve 27, and a two-position two-way hydraulic valve 28. The active booster type energy storage device is as shown in Embodiment 1. The two working oil ports of the first hydraulic bidirectional lock 26 are respectively connected to the control fluid interface 8 of the first liquid chamber 6 and the control fluid interface 8 of the second liquid chamber 7. There are two first two-position three-way hydraulic valves 27, and the working oil ports of the two first two-position three-way hydraulic valves 27 are respectively connected to the two control oil ports of the first hydraulic bidirectional lock 26. There are two two-position two-way hydraulic valves 28, and the pressure oil ports of the two two-position two-way hydraulic valves 28 are both connected to the working fluid interface 13. The working oil ports of the two two-position two-way hydraulic valves 28 are connected to an oil outlet pipeline 37, and a first check valve 29 is connected in series in the oil outlet pipeline 37. The working fluid interface 13 is also connected to an inlet pipeline 30, and a second check valve 31 is connected in series in the inlet pipeline 30.

[0066] It is easy to understand that the hydraulic two-way lock, the two-position three-way hydraulic valve, the two-position two-way hydraulic valve, and the check valve are all mature structures in the field. In this embodiment, the first hydraulic two-way lock 26 is used to ensure the reliable locking of the active booster energy storage device, the first two-position three-way hydraulic valve 27 is used to control the movement of the booster piston assembly of the active booster energy storage device, the two-position two-way hydraulic valve 28 is used to release the high pressure of the working fluid in the storage chamber 12, the first check valve 29 is used to ensure that the working fluid can only flow out from the two-position two-way hydraulic valve 28, and the second check valve 31 ensures that the working fluid can only flow into the storage chamber 12.

[0067] In actual use, the distributed hydraulic source is located near the hydraulic support 33 to provide additional hydraulic fluid to the hydraulic support 33. Example 3

[0068] Reference Figures 6 to 9The dual-source hydraulic supply system provided by this invention includes a pump station hydraulic source 32, a hydraulic support 33, a second hydraulic bidirectional lock 34, a distributed hydraulic source, and a control valve group. The pump station hydraulic source 32 is provided with a pressure oil circuit and a return oil circuit. Multiple hydraulic supports 33 are provided. Multiple second hydraulic bidirectional locks 34 are provided and correspond one-to-one with the hydraulic supports 33. The two working ports of the second hydraulic bidirectional lock 34 are respectively connected to the rod-side chamber and rodless chamber of the corresponding hydraulic support 33. As shown in Embodiment 2, multiple distributed hydraulic sources are provided and correspond one-to-one with the second hydraulic bidirectional locks 34. The pressure port of the first two-position three-way hydraulic valve 27 is connected to the pressure oil circuit, and the return oil port of the first two-position three-way hydraulic valve 27 is connected to the return oil circuit. Two oil outlet pipes 37 are respectively connected to the corresponding second hydraulic... The two control ports of the bidirectional lock 34 are connected; the control valve group is provided with multiple valves, each corresponding to a distributed hydraulic source. The control valve group includes two sets of sub-valve groups. Each set of sub-valve groups includes a second two-position three-way hydraulic valve 35 and a third two-position three-way hydraulic valve 36 connected to each other. The pressure port of the second two-position three-way hydraulic valve 35 is connected to the pressure oil circuit. The return port of the second two-position three-way hydraulic valve 35 is connected to the return oil circuit. The working port of the second two-position three-way hydraulic valve 35 is connected to the pressure port of the same set of third two-position three-way hydraulic valve 36. The working ports of the two sets of third two-position three-way hydraulic valves 36 are respectively connected to the two control ports of the corresponding second hydraulic bidirectional lock 34. The return ports of the two sets of third two-position three-way hydraulic valves 36 are both connected to the inlet pipeline 30 of the next adjacent distributed hydraulic source.

[0069] For ease of description, the pressure oil circuit is defined as P and the return oil circuit as R. Two two-position two-way hydraulic valves 28 are defined as Y1 and Y2, two sets of sub-valve groups are defined as the second two-position three-way hydraulic valves 35 as Z1 and Z2, two sets of sub-valve groups are defined as the third two-position two-way hydraulic valves as X1 and X2, and the two control ports of the second hydraulic two-way lock 34 are defined as A1 and A2 and the two working ports as B1 and B2. Y1, Z1, X1, A1 and B1 are set accordingly, and Y2, Z2, X2, A2 and B2 are set accordingly.

[0070] like Figure 7 As shown, the hydraulic support 33 is in the normal position: Y1 and Y2 are in the left separation position, and the active booster energy storage device is separated from the hydraulic support 33 through Y1 and Y2; Z1 and Z2 are in the left separation position, and the pump station hydraulic source 32 is separated from the hydraulic support 33 through Z1 and Z2; no pressure oil enters A1 and A2, and the hydraulic support 33 is in a stationary state.

[0071] like Figure 8As shown, the hydraulic support 33 is in the raised position: Y1 is in the left-side partition position and Y2 is in the right-side conduction position. The working fluid in the reservoir 12 enters the rodless chamber of the hydraulic support 33 sequentially through Y2, A2, and B2, thus achieving fluid supply from the distributed hydraulic source. Z1 is in the left-side partition position and Z2 is in the left-side conduction position. X1 is in the right-side return position and X2 is in the left-side inlet position. The pressure oil in P enters the rodless chamber of the hydraulic support 33 sequentially through Z2, X2, A2, and B2, thus achieving fluid supply from the pump station hydraulic source 32. Simultaneously, the oil in the rod chamber of the hydraulic support 33 flows back sequentially through B1, A1, and X1 to the inlet pipe 30 of the next adjacent distributed hydraulic source. The distributed hydraulic source and the pump station hydraulic source 32 cooperate to achieve dual-source fluid supply to the rodless chamber of the hydraulic support 33, thereby completing the raised movement of the hydraulic support 33.

[0072] like Figure 9 As shown, the hydraulic support 33 is in the lowered state: Y1 is in the right-side conducting position and Y2 is in the left-side separating position. The working fluid in the reservoir 12 enters the rod chamber of the hydraulic support 33 sequentially through Y1, A1, and B1, thus achieving fluid supply from the distributed hydraulic source. Z1 is in the right-side conducting position and Z2 is in the left-side separating position. X1 is in the left-side oil inlet position and X2 is in the right-side oil return position. The pressure oil in P enters the rod chamber of the hydraulic support 33 sequentially through Z1, X1, A1, and B1, thus achieving fluid supply from the pump station hydraulic source 32. Simultaneously, the oil in the rodless chamber of the hydraulic support 33 flows back sequentially through B2, A2, and X2 to the inlet pipe 30 of the next adjacent distributed hydraulic source. The distributed hydraulic source and the pump station hydraulic source 32 cooperate to achieve dual-source fluid supply to the rod chamber of the hydraulic support 33, thereby completing the lowering action of the hydraulic support 33.

[0073] It is easy to understand that the second hydraulic two-way lock 34 corresponds one-to-one with the hydraulic support 33, the distributed hydraulic source corresponds one-to-one with the second hydraulic two-way lock 34, and the control valve group corresponds one-to-one with the distributed hydraulic source. Therefore, the hydraulic support 33, the second hydraulic two-way lock 34, the distributed hydraulic source, and the control valve group all correspond one-to-one and are arranged sequentially. The inlet pipe 30 of the first-end distributed hydraulic source is connected to the pressure oil circuit, and the return ports of the two sets of third two-position three-way hydraulic valves 36 of the end control valve group are both connected to the return oil circuit.

[0074] The above are merely specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Although detailed descriptions have been provided with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments, and they should all be covered within the protection scope of the claims.

Claims

1. A dual-source liquid supply system, characterized in that, include: The pump station hydraulic power source (32) is equipped with a pressure oil circuit and a return oil circuit; Hydraulic supports (33), which are provided in multiple forms; The second hydraulic two-way lock (34) is provided in multiple ways and corresponds one-to-one with the hydraulic support (33). The two working oil ports of the second hydraulic two-way lock (34) are respectively connected to the rod chamber and rodless chamber of the corresponding hydraulic support (33). A distributed hydraulic power source includes an active booster-type energy storage device, a first hydraulic two-way lock (26), a first two-position three-way hydraulic valve (27), and a two-position two-way hydraulic valve (28); the active booster-type energy storage device includes a cylinder and a booster piston assembly, the cylinder axis is arranged vertically, an annular partition (1) and an elastic diaphragm (2) are fixed inside the cylinder, and the annular partition (1) is located above the elastic diaphragm (2), the booster piston assembly includes a piston rod (3), the piston rod (3) is coaxially arranged with the cylinder and is slidably and sealed in the annular partition (1), the top of the piston rod (3) is provided with an upper piston head (4), the piston rod... (3) has a lower piston head (5) at the bottom. A first liquid chamber (6) is formed between the upper piston head (4) and the top of the cylinder. A second liquid chamber (7) is formed between the upper piston head (4) and the annular partition (1). Both the first liquid chamber (6) and the second liquid chamber (7) are provided with control liquid interfaces (8). A first air chamber (9) is formed between the lower piston head (5) and the annular partition (1). The first air chamber (9) is in communication with the outside. A second air chamber (10) is formed between the lower piston head (5) and the elastic diaphragm (2). The second air chamber (10) is provided with control air interfaces (11). The elastic diaphragm (2) is connected to the bottom of the cylinder. A liquid storage chamber (12) is formed between the ends, and the liquid storage chamber (12) is provided with a working fluid interface (13); the two working oil ports of the first hydraulic two-way lock (26) are respectively connected to the control fluid interface (8) of the first liquid chamber (6) and the control fluid interface (8) of the second liquid chamber (7); two first two-position three-way hydraulic valves (27) are provided, and the working oil ports of the two first two-position three-way hydraulic valves (27) are respectively connected to the two control oil ports of the first hydraulic two-way lock (26); two two-position two-way hydraulic valves (28) are provided, and the pressure oil ports of the two two-position two-way hydraulic valves (28) are all connected to the working fluid interface (13), and the two two-position two-way hydraulic valves ( 28) The working oil ports are all connected to oil outlet pipes (37), and a first check valve (29) is connected in series in the oil outlet pipes (37); the working fluid interface (13) is also connected to an inlet pipe (30), and a second check valve (31) is connected in series in the inlet pipes (30); the distributed hydraulic source is provided with multiple ones and corresponds one-to-one with the second hydraulic two-way lock (34); the pressure oil port of the first two-position three-way hydraulic valve (27) is connected to the pressure oil circuit; the return oil port of the first two-position three-way hydraulic valve (27) is connected to the return oil circuit; the two oil outlet pipes (37) are respectively connected to the two control oil ports of the corresponding second hydraulic two-way lock (34); The control valve group is provided with multiple valves, each corresponding to a distributed hydraulic source. The control valve group includes two sets of sub-valve groups. Each set of sub-valve groups includes a second two-position three-way hydraulic valve (35) and a third two-position three-way hydraulic valve (36) connected to each other. The pressure port of the second two-position three-way hydraulic valve (35) is connected to the pressure oil circuit. The return port of the second two-position three-way hydraulic valve (35) is connected to the return oil circuit. The working port of the second two-position three-way hydraulic valve (35) is connected to the pressure port of the same set of third two-position three-way hydraulic valves (36). The working ports of the two sets of third two-position three-way hydraulic valves (36) are respectively connected to the two control ports of the corresponding second hydraulic two-way lock (34). The return ports of the two sets of third two-position three-way hydraulic valves (36) are connected to the inlet pipeline (30) of the next adjacent distributed hydraulic source.

2. The dual-source liquid supply system according to claim 1, characterized in that, The inlet pipe (30) of the first distributed hydraulic power source is connected to the pressure oil circuit, and the return ports of the two sets of third two-position three-way hydraulic valves (36) of the end control valve group are both connected to the return oil circuit.

3. The dual-source liquid supply system according to claim 1, characterized in that, The cylinder body includes a top cylinder (14), a middle cylinder (15) and a bottom cylinder (16) arranged sequentially from top to bottom. The annular partition (1) is located between the top cylinder (14) and the bottom cylinder (16). The annular partition (1) is provided with a connecting hole (17) to keep the first air chamber (9) connected to the outside. A connecting ring plate (18) is provided between the middle cylinder (15) and the bottom cylinder (16). The connecting ring plate (18) is provided with the control air interface (11). The elastic diaphragm (2) is located in the bottom cylinder (16).

4. The dual-source liquid supply system according to claim 3, characterized in that, The inner wall of the bottom cylinder (16) is provided with an annular groove (19), and the edge of the elastic diaphragm (2) is engaged in the annular groove (19) and fixed by a clamping ring (20) fixed to the inner wall of the bottom cylinder (16).

5. The dual-source liquid supply system according to claim 4, characterized in that, The edge of the elastic diaphragm (2) is provided with a circular protrusion (21), the protrusion (21) is exposed in the annular groove (19), the cross section of the clamping ring (20) is S-shaped, the top of the clamping ring (20) is fixed to the inner wall of the bottom cylinder (16), and the bottom of the clamping ring (20) wraps around and clamps the protrusion (21).

6. The dual-source liquid supply system according to claim 3, characterized in that, The edge of the annular partition (1) is provided with an upper positioning cylinder (22) for sleeved inside the top cylinder (14) and the edge of the annular partition (1) is provided with a lower positioning cylinder (23) for sleeved inside the middle cylinder (15).

7. The dual-source liquid supply system according to claim 1, characterized in that, The area of ​​the upper piston head (4) is larger than the area of ​​the lower piston head (5).

8. The dual-source liquid supply system according to claim 1, characterized in that, The inner wall of the annular partition (1) is provided with a guide ring (24) and a sealing ring (25), and the piston rod (3) is inserted in the guide ring (24) and the sealing ring (25).

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