Bag type energy accumulator

Abstract

The invention provides a bag type energy accumulator which comprises a shell and a bag body installed in the shell, the bag body is provided with an air inlet pipe extending out of the shell, the air inlet pipe is connected with the top of the shell in a sealed mode, an air bag buffering assembly is installed outside the shell and comprises a piston cylinder installed on the side portion of the shell, and the piston cylinder is connected with the air inlet pipe in a sealed mode. A piston block is arranged in the piston cylinder in a sliding mode, one end of the piston cylinder is communicated with an air inlet pipe through a pipe set, an exhaust port is formed in the other end of the piston cylinder, a piston rod extending out of the piston cylinder is arranged on the piston block, and the piston rod is driven by a driving mechanism. The piston rod and the piston block are driven to move in the direction of the exhaust port, part of gas in the bag body enters the piston cylinder, then the bag body is contracted, the space between the bottom of the bag body and the shell and the space between the bottom of the bag body and the mushroom-shaped valve are enlarged, the mushroom-shaped valve and oil liquid are prevented from directly impacting the bag body, and the service life of the bag body is prolonged.

Description

Technical Field

[0001] The present invention relates to the field of accumulators, and more particularly, to a bladder accumulator. Background Art

[0002] A bladder accumulator is a device that stores and releases energy in a hydraulic system by utilizing the compressibility principle of gas (usually nitrogen); one of its core structures is an elastic capsule (bladder), and the compressible gas fills the capsule. During operation, when the pressure in the hydraulic system rises, the oil enters the accumulator, and the gas is compressed until the pressure in the system pipeline no longer rises. When the pipeline pressure drops, the compressed air expands and presses the oil into the circuit, thereby slowing down the drop in pipeline pressure.

[0003] The Chinese utility model patent (application number: CN202421240308.9) discloses a "bladder accumulator with a flow dividing member", which includes a housing. An inflation valve is provided at the top of the housing, a capsule is provided inside the housing, and a hydraulic oil valve body seat is provided at the other end of the housing away from the inflation valve. The hydraulic oil valve body seat includes a valve body provided inside, and a flow dividing member is fixed to the upper part of the seat body located inside the housing; by means of the flow dividing member provided on the hydraulic oil valve body seat, the pressure oil input into the housing is divided, so that after the original oil is divided, the output direction is wider, and the pressure of the pressure oil received by the capsule is more uniform. Although the accumulator provided by the above patent can reduce the probability of capsule loss and improve the service life of the capsule through the setting of the flow dividing member, since the accumulator housing generally only has openings at its upper and lower ends for installing the airbag and the valve body, and generally the openings are adapted to the sizes of the air inlet pipe of the airbag and the valve body, the specifications for installing the flow dividing member through the corresponding installation port of the valve body are also limited, resulting in limited flow dividing effect. Moreover, the flow dividing member is installed inside the housing, and after it is damaged, it needs to be disassembled and assembled together with the valve body, so the practicability is relatively low.

[0004] Therefore, we make improvements and propose a bladder accumulator. Summary of the Invention

[0005] The purpose of the present invention is to address the problem that generally only openings are left at the upper and lower ends of the accumulator housing for installing the airbag and the valve body, and generally the openings are adapted to the sizes of the air inlet pipe of the airbag and the valve body. Therefore, the specifications for installing the flow dividing member through the corresponding installation port of the valve body are also limited, resulting in limited flow dividing effect. Moreover, the flow dividing member is installed inside the housing, and after it is damaged, it needs to be disassembled and assembled together with the valve body, so the practicability is relatively low.

[0006] In order to achieve the above-mentioned invention purpose, the present invention provides a bladder accumulator to improve the above problems.

[0007] Specifically, this application is as follows: A bladder accumulator, comprising a housing, a bladder installed inside the housing, and a mushroom valve installed at the bottom end of the housing. An air inlet pipe extending outside the housing is provided on the bladder, and the air inlet pipe is sealingly connected between the top of the housing. An airbag buffer assembly is installed outside the housing. The airbag buffer assembly includes a piston cylinder installed on the side of the housing. A piston block is slidably arranged inside the piston cylinder. One end of the piston cylinder is communicated with the air inlet pipe through a pipe group. The other end of the piston cylinder is provided with an exhaust port. A piston rod protruding from the piston cylinder is provided on the piston block, and the piston rod is driven by a driving mechanism. When the hydraulic oil in the hydraulic system starts to flow into the housing, the driving mechanism drives the piston rod and the piston block to move in the direction close to the exhaust port.

[0008] As a preferred technical solution of the present application, the airbag buffer assembly further includes a three-way pipe. The bottom end of the three-way pipe is in threaded and sealed cooperation with the air inlet pipe. The side of the three-way pipe is communicated with the piston cylinder through a pipe group. The top end of the three-way pipe is used to be connected with an externally provided and adapted inflation valve.

[0009] As a preferred technical solution of the present application, a support frame is provided on the side of the housing. The support frame includes an arc-shaped panel detachably installed on the housing. A pair of support plates are arranged in parallel at the top of the arc-shaped panel. An installation notch is provided on the lower support plate. The piston cylinder is detachably installed between the two support plates, and the piston rod moves through the installation notch.

[0010] As a preferred technical solution of the present application, at least two piston cylinders are provided. The pipe group includes an L-shaped pipe connected to the three-way pipe, a straight pipe passing through the upper support plate, and a multi-way pipe installed at the bottom end of the straight pipe and communicated with the two piston cylinders. A pipe orifice adapted to the multi-way pipe is provided on the piston cylinder.

[0011] As a preferred technical solution of the present application, the driving mechanism includes an elastic member. The two ends of the elastic member are respectively fixed between the outer end of the piston rod and the end of the piston cylinder. Under normal hydraulic pressure, the elastic force of the elastic member keeps the piston block in a static state, and a space for the piston block to displace is left between the piston block and the end of the piston cylinder where the exhaust port is located.

[0012] As a preferred technical solution of the present application, the driving mechanism further includes a driving member. The driving member includes an oil inlet pipe communicated with the mushroom valve. An impeller is arranged inside the oil inlet pipe. A threaded sleeve is coaxially installed on the impeller. A top rod is arranged on the support frame through a linear guiding structure. The top end of the top rod is fixed to the piston rod, and the bottom end of the top rod extends into the threaded sleeve and is in threaded cooperation with it.

[0013] As a preferred technical solution of the present application, the linear guiding structure includes a slide rail and a slide block installed on the arc-shaped panel. The relative ends of the ejector rod and the piston rod are fixed through a connecting seat. The connecting seat is a plate-like structure and is provided with connecting holes for installing the ejector rod and the piston rod. The bottom end of the elastic member is fixed on the connecting seat. The slide block is a Z-shaped structure, its top end is slidably matched with the slide rail, and its bottom end is fixed on the connecting seat.

[0014] As a preferred technical solution of the present application, the middle part of the oil inlet pipe has a columnar box body. An activity cavity for the impeller to rotate freely is provided inside the box body. The top end of the box body is detachably provided with a sealing cover, and a bearing seat for installing the threaded sleeve is arranged at the top end of the sealing cover.

[0015] As a preferred technical solution of the present application, the oil inlet pipe is located on one side of the box body. The blades of the impeller face the pipeline of the oil inlet pipe. Flange seats are arranged at both ends of the oil inlet pipe.

[0016] As a preferred technical solution of the present application, a group of through holes for the oil liquid to pass through are provided on the blades of the impeller.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: In the solution of the present application: Through the provided airbag buffer assembly, the airbag buffer assembly includes a piston cylinder, a piston block and a piston rod. The piston cylinder is communicated with the bladder. When the oil liquid enters the shell and squeezes the bladder, by driving the piston rod and the piston block to move towards the exhaust port, part of the gas in the bladder enters the piston cylinder, and then the bladder shrinks, increasing the space between the bottom of the bladder and the shell and the mushroom valve, avoiding the direct impact of the mushroom valve and the oil liquid on the bladder, which is beneficial to improving the service life of the bladder. At the same time, structures such as the piston cylinder, the piston block and the piston rod are installed outside the shell, which is convenient for maintenance and improves the practicability of the device. Description of the Drawings

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the bladder accumulator provided by the present application; Figure 2 It is a side view of the bladder accumulator provided by the present application; Figure 3 It is a structural schematic diagram of the connection between the bladder and the piston cylinder of the bladder accumulator provided by the present application; Figure 4 It is a structural schematic diagram of the piston cylinder and the support frame of the bladder accumulator provided by the present application; Figure 5 It is a structural schematic diagram of the driving mechanism of the bladder accumulator provided by the present application; Figure 6 It is a structural schematic diagram of the threaded sleeve and the ejector rod of the bladder accumulator provided by the present application.

[0019] Indications in the figure: 100, housing; 101, bladder; 1011, intake pipe; 102, mushroom valve; 200, airbag buffer assembly; 201, piston cylinder; 2011, pipe orifice; 202, piston block; 203, pipe group; 2031, L-shaped pipe; 2032, straight pipe; 2033, multi-way pipe; 204, exhaust port; 205, piston rod; 206, three-way pipe; 300, drive mechanism; 301, elastic member; 302, oil inlet pipe; 3021, box body; 3022, movable cavity; 3023, sealing cover; 3024, bearing seat; 303, impeller; 3031, through hole; 304, threaded sleeve; 305, ejector rod; 306, slide rail; 307, slide block; 308, connecting seat; 400, support frame; 401, arc-shaped panel; 402, support plate; 403, installation notch. Specific embodiments

[0020] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] The present invention will be further described below in conjunction with the embodiments.

[0022] Embodiment: Refer to Figures 1 to 3 , a bladder accumulator, including a housing 100, a bladder 101 installed in the housing 100, and a mushroom valve 102 installed at the bottom end (oil inlet) of the housing 100. The mushroom valve 102 is mainly composed of a valve body, a valve core, a spring and a seal (not shown in the specific structure diagram). The valve core is mushroom-shaped (like a mushroom) and cooperates with the valve seat to achieve sealing. The spring provides a pre-tightening force to control the opening and closing of the valve core; when the accumulator is filled with oil, the mushroom valve 102 opens under the action of oil pressure, and the oil enters the housing 100; when the system pressure drops or the airbag pressure is higher than the oil pressure, the spring pushes the valve core to close; In order to solve the problem that the accumulator housing 100 generally only has openings at its upper and lower ends for installing the airbag and the valve body, the size of the openings is adapted to the intake pipe 1011 of the airbag and the structures such as the valve body, so it is inconvenient to install a flow divider in the housing 100, and the specifications for installing the flow divider through the corresponding installation port of the valve body are also limited, resulting in limited flow dividing effect; In the present application, an air intake pipe 1011 extending to the outside of the shell 100 is provided on the airbag body 101, and the air intake pipe 1011 is sealed and connected to the top of the shell 100. An airbag cushioning assembly 200 is installed outside the shell 100. The airbag cushioning assembly 200 includes a piston cylinder 201 installed on the side of the shell 100, and a piston block 202 is slidably arranged in the piston cylinder 201. One end of the piston cylinder 201 is connected to the air intake pipe 1011 through a pipe group 203, and the other end of the piston cylinder 201 is provided with an exhaust port 204. The piston block 202 has a piston rod 205 extending out of the piston cylinder 201, and the piston rod 205 is driven by a driving mechanism 300; By means of the piston cylinder 201, the piston block 202 and the piston rod 205, the piston cylinder 201 is connected with the capsule 101. By changing the position of the piston block 202 in the piston cylinder 201, the capsule 101 in the housing 100 can be contracted (when the capsule 101 expands and contacts the inner wall of the housing 100 and the mushroom valve 102). When the oil enters the housing 100 and squeezes the capsule 101, by driving the piston rod 205 and the piston block 202 to move toward the exhaust port 204, part of the gas in the capsule 101 enters the piston cylinder 201, thereby contracting the capsule 101, increasing the space between the bottom of the capsule 101 and the housing 100 and the mushroom valve 102, avoiding the mushroom valve 102 and the oil from directly impacting the capsule 101, which is beneficial to increasing the service life of the capsule 101. At the same time, the piston cylinder 201, the piston block 202 and the piston rod 205 and other structures are installed outside the housing 100, which is convenient for maintenance and improves the practicality of the device. Further, see Figures 1 to 3 The airbag cushioning assembly 200 also includes a three-way pipe 206, the bottom end of the three-way pipe 206 is threadedly matched with the intake pipe 1011 and sealed, the side of the three-way pipe 206 is connected to the piston cylinder 201 through the pipe group 203, and the top of the three-way pipe 206 is used to connect with an external adaptive inflation valve, and the inflation valve is used to inject inert gas (such as nitrogen) into the bladder body 101. The three-way pipe 206 is set to facilitate the installation of the bladder body 101 and the shell 100, wherein the bladder body 101 is installed in the shell 100 through the larger opening at the bottom of the shell 100, and the specific installation process is not repeated here.

[0023] Further, see Figure 1 , Figure 2 and Figure 4As shown in the figure, a support frame 400 is provided on the side of the housing 100. The support frame 400 includes an arc-shaped panel 401 detachably installed on the housing 100. The arc-shaped panel 401 is attached to the housing 100 through fasteners such as bolts and nuts. A pair of support plates 402 are arranged in parallel at the top of the arc-shaped panel 401. The support plates 402 provide a support and fixing environment for the piston cylinder 201. An installation notch 403 is provided on the lower support plate 402 to facilitate the placement of the piston rod 205 together with the piston cylinder 201 between the two support plates 402. The top end of the piston cylinder 201 has a threaded groove, and the piston cylinder 201 is detachably installed between the two support plates 402. The piston rod 205 moves through the installation notch 403.

[0024] Further, referring to Figure 1 , Figure 2 and Figure 4 As shown in the figure, at least two piston cylinders 201 are provided, which specifically depend on the working environment of the accumulator. The pipe group 203 includes an L-shaped pipe 2031 connected to a three-way pipe 206, a straight pipe 2032 passing through the upper support plate 402, and a multi-way pipe 2033 installed at the bottom end of the straight pipe 2032 and communicating with the two piston cylinders 201. A pipe orifice 2011 adapted to the multi-way pipe 2033 is provided on the piston cylinder 201. During installation, the straight pipe 2032 can be first hermetically connected to the L-shaped pipe 2031, and the straight pipe 2032 is inserted and fixed on the upper support plate 402. Then, the multi-way pipe 2033 is installed at the bottom end of the straight pipe 2032, and the piston cylinders 201 are installed on both sides of the multi-way pipe 2033. Finally, the piston cylinders 201 can be fixed to the support plates 402 through bolts. Through the cooperation of the above structures, the disassembly and assembly process of the airbag buffer assembly 200 is convenient.

[0025] Further, referring to Figure 1 , Figure 2 and Figures 4 to 6 As shown in the figure, the driving mechanism 300 includes an elastic member 301. The two ends of the elastic member 301 are respectively fixed between the outer end of the piston rod 205 and the end of the piston cylinder 201. Under normal hydraulic pressure, when the bladder 101 is filled with gas in the housing 100, the elastic force of the elastic member 301 keeps the piston block 202 in a stationary state, and there is a space for the displacement of the piston block (202) between the piston block 202 and one end of the exhaust port 204 on the piston cylinder 201; it also includes a driving member. The driving member includes an oil inlet pipe 302 communicating with the mushroom valve 102. An impeller 303 is arranged in the oil inlet pipe 302. A threaded sleeve 304 is coaxially installed on the impeller 303. A push rod 305 is arranged on the support frame 400 through a linear guiding structure. The top end of the push rod 305 is fixed to the piston rod 205, and the bottom end of the push rod 305 extends into the threaded sleeve 304 and is in threaded cooperation with it; Through the provided oil inlet pipe 302 and impeller 303, when the hydraulic pressure of the hydraulic system is high and the accumulator starts to fill with oil, the oil first passes through the oil inlet pipe 302. The impeller 303 is driven to rotate self - sufficiently under the flow of the oil. Correspondingly, the impeller 303 drives the threaded sleeve 304 to rotate self - sufficiently. Since the threaded sleeve 304 is in threaded fit with the ejector rod 305 and the ejector rod 305 is restricted by a linear guiding structure, the ejector rod 305 moves outward with the self - rotation of the threaded sleeve 304, thereby pushing the piston rod 205 and the piston block 202 in the piston cylinder 201 upward. Correspondingly, a part of the gas in the bladder 101 enters the piston cylinder 201 through the pipe group 203, causing the bladder 101 to contract, achieving the purpose of increasing the space between the bottom of the bladder 101 and the housing 100 and the mushroom valve 102, so that when the mushroom valve 102 is pushed open by the oil, the oil does not directly impact the bladder 101. Correspondingly, when the hydraulic pressure of the hydraulic system decreases and returns to normal, under the combined action of the elastic force of the elastic member 301, the expansion and reset of the bladder 101 squeezing the oil in the housing 100 to be discharged, and the reverse rotation of the impeller 303 driven by the oil, the piston block 202 can be reset to contact the inner wall of the bladder 101 with the housing 100 and the mushroom valve 102, facilitating the cyclic operation.

[0026] It can be understood that the piston block 202 moves in the piston cylinder 201, and the distance of its displacement is limited. Correspondingly, the range of controlling the contraction of the bladder 101 by the piston block 202 is also limited. When the oil passing through the impeller 303 is not sufficient to make the threaded sleeve 304 rotate self - sufficiently against the elastic force of the elastic member 301, it means that the hydraulic pressure is low in this state, and the impact of the oil entering the housing 100 on the bladder 101 is also low. When the piston block 202 is located at the top of the piston cylinder 201 and no longer moves, the oil can also compress the bladder 101 and the gas stored in it. Further, referring to Figure 1 、 Figure 2 and Figure 6 As shown in, the linear guiding structure includes a slide rail 306 and a slide block 307 installed on the arc - shaped panel 401. The relative ends of the ejector rod 305 and the piston rod 205 are fixed through a connecting seat 308. The connecting seat 308 is a plate - like structure and is provided with connecting holes for installing the ejector rod 305 and the piston rod 205. The ends of the piston rod 205 and the ejector rod 305 are fixed on the connecting seat 308 through screw dislocation, which is convenient for disassembly and assembly. The bottom end of the elastic member 301 is fixed on the connecting seat 308. The slide block 307 is a Z - shaped structure, its top end is in sliding fit with the slide rail 306, and its bottom end is fixed on the connecting seat 308. Preferably, the bottom of the slide block 307 can be fixed together with the ejector rod 305.

[0027] Further, referring to Figure 5As shown in the figure, the middle part of the oil inlet pipe 302 has a columnar box body 3021. Inside the box body 3021, there is an activity cavity 3022 for the impeller 303 to rotate self - sufficiently. The activity cavity 3022 is a columnar cavity. At the top of the box body 3021, a sealing cover 3023 is detachably installed. At the top of the sealing cover 3023, there is a bearing seat 3024 for installing the threaded sleeve 304. Preferably, the sealing cover 3023 and the top of the box body 3021 can be in threaded fit and are equipped with a sealing ring. The oil inlet pipe 302 is located on one side of the box body 3021. The blades of the impeller 303 face the pipeline of the oil inlet pipe 302, so that the blades of the impeller 303 are directly affected by the fluid force of the oil, which is convenient for driving the threaded sleeve 304 to rotate self - sufficiently. At both ends of the oil inlet pipe 302, there are flange seats. The oil inlet pipe 302 and the mushroom - shaped valve 102 are fixedly connected through flanges; on the blades of the impeller 303, there is a group of through - holes 3031 for the oil to pass through. When the piston block 202 no longer moves at the top inside the piston cylinder 201, the oil passes through the through - holes 3031 and enters the housing 100 to work normally.

[0028] In the present invention, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation" 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 directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above - mentioned terms in the present invention can be understood according to specific circumstances.

[0029] Obviously, the above - described embodiments are only a part of the embodiments of the present invention, rather than all of them. The accompanying drawings show the preferred embodiments of the present invention, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing specific embodiments, or equivalently replace some of the technical features. Any equivalent structure directly or indirectly using the content of the specification and drawings of the present invention in other related technical fields is equally within the scope of the patent protection of the present invention.

Claims

1. A bladder accumulator, comprising a housing (100), a bladder (101) installed within the housing (100), and a mushroom valve (102) installed at the bottom end of the housing (100), characterized in that, An air inlet pipe (1011) extending outside the housing (100) is provided on the bladder body (101). The air inlet pipe (1011) is hermetically connected to the top of the housing (100). An airbag buffer assembly (200) is installed outside the housing (100). The airbag buffer assembly (200) includes a piston cylinder (201) installed on the side of the housing (100). A piston block (202) is slidably arranged in the piston cylinder (201). One end of the piston cylinder (201) is communicated with the air inlet pipe (1011) through a pipe group (203). The other end of the piston cylinder (201) is provided with an exhaust port (204). A piston rod (205) extending out of the piston cylinder (201) is provided on the piston block (202). The piston rod (205) is driven by a driving mechanism (300). When the hydraulic oil in the hydraulic system starts to flow into the housing (100), the driving mechanism (300) drives the piston rod (205) and the piston block (202) to move towards the direction close to the exhaust port (204).

2. The bladder accumulator according to claim 1, wherein The airbag buffer assembly (200) further includes a three-way pipe (206). The bottom end of the three-way pipe (206) is in threaded fit and sealed with the air inlet pipe (1011). The side part of the three-way pipe (206) is communicated with the piston cylinder (201) through a pipe group (203). The top end of the three-way pipe (206) is used for connecting with an externally adapted inflation valve.

3. A bladder accumulator according to claim 2, characterized in that, A support frame (400) is provided on the side of the housing (100). The support frame (400) includes an arc-shaped panel (401) detachably installed on the housing (100). A pair of support plates (402) are arranged in parallel at the top of the arc-shaped panel (401). An installation notch (403) is formed in the lower support plate (402). The piston cylinder (201) is detachably installed between the two support plates (402). The piston rod (205) moves through the installation notch (403).

4. A bladder accumulator according to claim 3, wherein, At least two piston cylinders (201) are provided. The pipe group (203) includes an L-shaped pipe (2031) connected to the three-way pipe (206), a straight pipe (2032) passing through the upper support plate (402), and a multi-way pipe (2033) installed at the bottom end of the straight pipe (2032) and communicated with the two piston cylinders (201). A pipe orifice (2011) adapted to the multi-way pipe (2033) is provided on the piston cylinder (201).

5. A bladder accumulator according to claim 4, wherein, The driving mechanism (300) includes an elastic member (301). Two ends of the elastic member (301) are respectively fixed between the outer end of the piston rod (205) and the end of the piston cylinder (201). Under normal hydraulic pressure, the elastic force of the elastic member (301) keeps the piston block (202) in a static state, and a space for the piston block (202) to displace is left between the piston block (202) and one end of the exhaust port (204) on the piston cylinder (201).

6. A bladder accumulator according to claim 5, characterized in that, The driving mechanism (300) further includes a driving member, the driving member includes an oil inlet pipe (302) communicating with the mushroom valve (102), an impeller (303) is arranged in the oil inlet pipe (302), a threaded sleeve (304) is coaxially installed on the impeller (303), a push rod (305) is arranged on the support frame (400) through a linear guiding structure, the top end of the push rod (305) is fixed to the piston rod (205), and the bottom end of the push rod (305) extends into the threaded sleeve (304) and is in threaded cooperation with it.

7. A bladder accumulator according to claim 6, wherein, The linear guiding structure includes a slide rail (306) and a slide block (307) installed on the arc-shaped panel (401), the relative ends of the push rod (305) and the piston rod (205) are fixed through a connecting seat (308), the connecting seat (308) is a plate-like structure and is provided with connecting holes for installing the push rod (305) and the piston rod (205), the bottom end of the elastic member (301) is fixed on the connecting seat (308), the slide block (307) is a Z-shaped structure and its top end is slidably matched with the slide rail (306), and its bottom end is fixed on the connecting seat (308).

8. A bladder accumulator according to claim 7, wherein The middle part of the oil inlet pipe (302) has a cylindrical box body (3021), an activity cavity (3022) for the impeller (303) to rotate is arranged in the box body (3021), a sealing cover (3023) is detachably arranged at the top end of the box body (3021), and a bearing seat (3024) for installing the threaded sleeve (304) is arranged at the top end of the sealing cover (3023).

9. The bladder accumulator according to claim 8, characterized in that, The oil inlet pipe (302) is located on one side of the box body (3021), the blades of the impeller (303) face the pipeline of the oil inlet pipe (302), and flange seats are arranged at both ends of the oil inlet pipe (302).

10. A bladder accumulator according to claim 9, characterized in that, A group of through holes (3031) for the oil liquid to pass through are arranged on the blades of the impeller (303).

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