Valve group sealing and assembling structure of hydraulic power unit and using method of valve group sealing and assembling structure

Abstract

The invention discloses a valve group sealing and assembling structure of a hydraulic power unit and a using method of the valve group sealing and assembling structure, and relates to the technical field of valve group sealing and assembling structures. The first sealing structure comprises a first sealing shell, a second sealing shell is arranged on the outer side of the first sealing shell, a sealing groove is formed in the second sealing shell, an extension pipe is arranged on the outer side of the sealing groove, a first sealing ring is arranged on the outer side of the extension pipe, a first sealing gasket is arranged on the outer side of the first sealing ring, and a protective shell is installed on the outer side of the first sealing gasket. The second sealing structure comprises a sealing plate, a sealing pipe is connected to the inner side of the protective pad, a buffer damper is arranged in the sealing pipe, and a second sealing pad is connected to the inner side of the buffer damper. Through the arrangement of the second sealing structure, the first sealing structure performs sealing protection on the outer side of the hydraulic power unit body and the connecting end, the situation of leakage or water seepage at the connecting end is completely eradicated, and through the arrangement of the second sealing structure, a sealing pipe in the second sealing structure can perform sealing protection on the connecting position of the connecting end and the valve group.

Description

Technical Field

[0001] This invention relates to the field of valve assembly sealing structure technology, specifically to a valve assembly sealing structure for a hydraulic power unit and its usage method. Background Technology

[0002] The valve assembly sealing structure of a hydraulic power unit is a key component in ensuring the leak-free and stable operation of the hydraulic system. Its design must balance sealing performance, pressure resistance, and ease of assembly and disassembly. When connecting the hydraulic power unit and the valve body, a sealing assembly structure is needed to seal and secure the joint. However, existing valve assembly sealing structures have some shortcomings, such as: The assembly-type valve seal with application number CN202320953892.1 can be molded using other valve seal manufacturing equipment, even when the valve assembly has a high metal ring. It can easily mold the metal ring. However, in actual use, it is difficult to seal the junction between the hydraulic power unit and the valve assembly, which may lead to oil leakage or damage caused by external moisture or water seeping into the interior.

[0003] Therefore, we propose a valve group sealing assembly structure and its usage method for a hydraulic power unit to solve the problems mentioned above. Summary of the Invention

[0004] The purpose of this invention is to provide a valve group sealing assembly structure for a hydraulic power unit and its usage method, so as to solve the problem mentioned in the background art that the valve group sealing assembly structures currently on the market are difficult to seal at the junction between the hydraulic power unit and the valve group.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a valve group sealing assembly structure for a hydraulic power unit, comprising a hydraulic power unit body and a first sealing structure disposed on the outside of the hydraulic power unit body, wherein a connecting end is provided on the outside of the hydraulic power unit body; The first sealing structure includes a first sealing shell, which is sealed to the inside of the hydraulic power unit body. A second sealing shell is provided on the outside of the first sealing shell. A sealing groove is provided inside the second sealing shell. An extension tube is provided on the outside of the sealing groove. A first sealing ring is provided on the outside of the extension tube. A first sealing gasket is provided on the outside of the first sealing ring. A protective shell is installed on the outside of the first sealing gasket. The first sealing structure has a second sealing structure inside, and the second sealing structure includes a sealing plate, a protective pad inside the sealing plate, a sealing tube connected inside the protective pad, and a buffer damper inside the sealing tube. The buffer damper is connected inside the second sealing pad, and a second sealing ring is provided inside the second sealing pad.

[0006] By setting up the first sealing structure and the second sealing structure, the first sealing structure can seal and protect the outside of the hydraulic power unit body and the connection end, thereby preventing leakage or water seepage at the connection end. Furthermore, by setting up the second sealing structure, the sealing pipe in the second sealing structure can seal and protect the connection between the connection end and the valve group, thus preventing leakage or water seepage at the connection when the hydraulic power unit body is connected to the valve group equipment, thereby increasing the sealing performance of the equipment during use.

[0007] As a preferred technical solution of the present invention, the outer side of the hydraulic power unit body is provided with heat dissipation fins, and the heat dissipation fins are sealed and connected to the first sealing shell. The outer side of the first sealing shell is provided with a fixing block connected to the hydraulic power unit body. The first sealing shell is made of heat-conducting material.

[0008] The above technical solution enables the hydraulic power unit body to be connected to the first sealing shell through the heat dissipation fins to be more stable, thereby increasing the stability of the equipment when it is installed with the hydraulic power unit body.

[0009] As a preferred technical solution of the present invention, the first sealing shell and the inner side of the second sealing shell are sealed together, and the second sealing shell is provided with a sealing membrane inside, and the sealing membrane can seal and block the gap between the first sealing shell and the second sealing shell.

[0010] The above technical solution enables the first sealing shell to block the gap between the two sealing shells through the sealing membrane when the first sealing shell is connected to the second sealing shell, thereby making the sealing connection between the first sealing shell and the second sealing shell more stable and increasing the sealing performance of the device during use.

[0011] As a preferred embodiment of the present invention, the second sealing shell is sealed and fitted to the outside of the connecting end through the sealing groove, and the connecting end passes through the extension tube and is connected to the sealing tube, and the extension tube is sealed and fixedly connected to the sealing tube through the first sealing ring.

[0012] The above technical solution enables the second sealing shell to seal the outside of the connection end through the extension tube, thereby increasing the sealing performance of the equipment during installation.

[0013] As a preferred embodiment of the present invention, a sealing cover is provided on the inner side of the second sealing shell, and the inner side of the sealing cover is sealed and fixedly connected to the first sealing gasket, and the sealing cover protects the first sealing ring and the first sealing gasket.

[0014] The above technical solution enables the first sealing ring and the first sealing gasket to be protected on their outer side by the sealing cover during use, thereby avoiding the problem of the first sealing ring and the first sealing gasket being corroded by the external environment.

[0015] As a preferred embodiment of the present invention, a tight-fitting block is provided on the inner side of the second sealing shell, and the second sealing shell is sealed and fixedly connected to the sealing plate in the middle of the second sealing structure through the tight-fitting block.

[0016] The above technical solution enables the second sealing shell to be snapped together with the sealing plate through a tight-fitting block, and avoids the problem of external moisture or water seeping into the interior of the second sealing shell and causing corrosion, thus increasing the protection of the equipment during use.

[0017] As a preferred embodiment of the present invention, the inner side of the sealing plate is fixedly connected to the protective pad, and the inner side of the protective pad is fixedly connected to the sealing pipe, and the outer side of the protective pad is fixedly connected to the sealing pipe. The inner side of the sealing pipe is in contact with the second sealing pad, and a pull tab is provided on the outer side of the second sealing pad.

[0018] The above technical solution enables the user to push out the pull tab to unfold the gasket when disassembling it, thereby disconnecting the gasket from the connection end for disassembly.

[0019] As a preferred technical solution of the present invention, a fixed shaft is provided on the outer side of the sealing plate, and a fixed frame is connected to the outer side of the fixed shaft. The fixed frame is sealed and fixedly connected to the fixed shaft through a sealing sheet. A connecting frame is provided on the outer side of the fixed frame, and a sealing ring is connected to the bottom of the connecting frame. A connecting damping is provided on the outer side of the sealing ring, and a fitting pad is provided on the inner side of the sealing ring.

[0020] The above technical solution enables the second sealing structure to fix the outer side of the valve group equipment through two sets of sealing rings when fixing the valve group equipment. This allows the equipment to be fixed by the sealing rings when sealing the valve group equipment, increasing the stability of the equipment when sealing the hydraulic power unit body and the valve group equipment.

[0021] A method for using a valve group sealing assembly structure of a hydraulic power unit includes the following steps: Step 1: Place the hydraulic power unit body inside the first sealing shell in the first sealing structure, and fix the first sealing shell with the fixing block. Then, seal the first sealing shell and the second sealing shell together, so that the sealing membrane inside the second sealing shell blocks and seals the gap at the junction. At the same time, the connecting end will also pass through the sealing groove set inside the second sealing shell and fit and seal with the extension tube. The first sealing gasket will also seal and fix the junction between the sealing groove and the extension tube. Step 2: The outer side of the extension tube is fitted with the sealing tube in the second sealing structure through the first sealing ring. At the same time, the connecting end is also connected to the valve group inside the sealing tube. At this time, the buffer damping inside the sealing tube will apply pressure to the second sealing gasket, so that the second sealing gasket fits and seals with the connecting end and the valve group. At the same time, the second sealing ring set inside the second sealing gasket will also fit with the connecting end and the valve group, thereby blocking the gap at the connection. Step 3: The sealing tube seals the interface between the connection end and the valve assembly. The fixed shaft can pass through the sealing plate and be fixedly connected to the second sealing shell, thereby further limiting the sealing plate. Then, the fixing frame can be fixedly connected to the fixing shaft through the sealing plate, so that the fixing frame can drive the upper and lower sealing rings to move to the appropriate position. Then, the inner side of the two sealing rings will be sealed and fixedly connected to the valve assembly through the fitting gasket, thereby fixing and limiting the valve assembly, so that the connection end of the hydraulic power unit body remains stable when connected to the valve assembly. Step 4: After the valve assembly is fixed by the sealing ring, the sealing ring will fit with the valve assembly through the bonding pad, thereby blocking the gap between the two. The fixing shaft and the fixing frame will also support the two sets of sealing rings. When disassembling, pull the two sets of sealing rings, so that the connection damping between the sealing rings extends to disassemble the valve assembly.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: by setting the first sealing structure and the second sealing structure, the first sealing structure can seal and protect the outside of the hydraulic power unit body and the connection end, thereby preventing leakage or water seepage at the connection end. Furthermore, by setting the second sealing structure, the sealing pipe in the second sealing structure can seal and protect the connection between the connection end and the valve group, thereby preventing leakage or water seepage at the connection when the hydraulic power unit body is connected to the valve group equipment, thus increasing the sealing performance of the equipment during use. Furthermore, by setting the sealing membrane, when the first sealing shell is connected to the second sealing shell, the sealing membrane can block the gap between the two sets of sealing shells, thereby making the sealing connection between the first sealing shell and the second sealing shell more stable, thus increasing the sealing performance of the device during use. Furthermore, by setting up the fixing frame and sealing rings, the second sealing structure can fix the outer side of the valve assembly equipment through two sets of sealing rings when fixing the valve assembly equipment. This allows the equipment to be fixed to the valve assembly equipment through the sealing rings, increasing the stability of the equipment when sealing the hydraulic power unit body and the valve assembly equipment. Attached Figure Description

[0023] Figure 1This is a frontal elevation view of the present invention. Figure 2 This is a three-dimensional structural diagram of the present invention, showing the first sealing shell and the second sealing shell separated. Figure 3 This is a three-dimensional structural schematic diagram of the side cross-section of the present invention; Figure 4 For the present invention Figure 3 A magnified structural diagram at point A; Figure 5 This is a three-dimensional structural schematic diagram of the present invention from a top cross-section; Figure 6 This is a three-dimensional structural diagram of the disassembled first sealing ring and sealing gasket of the present invention; Figure 7 This is a three-dimensional structural diagram of the sealing plate of the present invention; Figure 8 This is a cross-sectional three-dimensional structural diagram of the sealing tube of the present invention; Figure 9 For the present invention Figure 8 A magnified structural diagram at point B; Figure 10 This is a three-dimensional structural diagram of the fixed shaft of the present invention; Figure 11 This is a three-dimensional structural diagram of the disassembly of the sealing ring of the present invention.

[0024] In the diagram: 1. Hydraulic power unit body; 101. Connecting end; 102. Heat dissipation fins; 103. Fixing block; 2. First sealing structure; 201. First sealing shell; 202. Second sealing shell; 203. Sealing membrane; 204. Sealing groove; 205. Extension tube; 206. First sealing ring; 207. First sealing gasket; 208. Protective shell; 209. Sealing cover; 210. Sealing tube; 211. Sealing block; 3. Second sealing structure; 301. Sealing plate; 302. Protective gasket; 303. Sealing tube; 304. Buffer damping; 305. Second sealing gasket; 306. Second sealing ring; 307. Fixing shaft; 308. Sealing plate; 309. Fixing frame; 310. Sealing ring; 311. Connecting frame; 312. Connecting damping; 313. Adhesive pad; 314. Pulling plate. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0026] To address the difficulty in sealing the junction between the hydraulic power unit and the valve assembly in existing valve assembly structures, the following solution is disclosed. Please refer to [link / reference]. Figures 1-11The present invention provides a technical solution: a valve group sealing assembly structure for a hydraulic power unit, including a hydraulic power unit body 1 and a first sealing structure 2 disposed on the outside of the hydraulic power unit body 1, wherein a connecting end 101 is provided on the outside of the hydraulic power unit body 1. The first sealing structure 2 includes a first sealing shell 201, which is sealed to the inside of the hydraulic power unit body 1. A second sealing shell 202 is provided on the outside of the first sealing shell 201. A sealing groove 204 is provided inside the second sealing shell 202. An extension tube 205 is provided on the outside of the sealing groove 204. A first sealing ring 206 is provided on the outside of the extension tube 205. A first sealing gasket 207 is provided on the outside of the first sealing ring 206. A protective shell 208 is installed on the outside of the first sealing gasket 207. The first sealing structure 2 is provided with a second sealing structure 3 inside, and the second sealing structure 3 includes a sealing plate 301, and a protective pad 302 is provided on the inner side of the sealing plate 301, and a sealing tube 303 is connected to the inner side of the protective pad 302. A buffer damper 304 is provided inside the sealing tube 303, and a second sealing pad 305 is connected to the inner side of the buffer damper 304. A second sealing ring 306 is provided on the inner side of the second sealing pad 305. The hydraulic power unit body 1 has heat dissipation fins 102 on its outer side, and the heat dissipation fins 102 are sealed to the first sealing shell 201. The first sealing shell 201 has a fixing block 103 on its outer side that is connected to the hydraulic power unit body 1. The first sealing shell 201 is made of heat-conducting material. The first sealing shell 201 is sealed to the inner side of the second sealing shell 202, and the second sealing shell 202 is provided with a sealing membrane 203 inside, and the sealing membrane 203 can seal and block the gap between the first sealing shell 201 and the second sealing shell 202. When the first sealing shell 201 is connected to the second sealing shell 202, the sealing membrane 203 can block the gap between the two, so that the first sealing shell 201 will not leak when connected to the second sealing shell 202, thus increasing the sealing performance of the device during installation. The second sealing shell 202 is sealed and fitted to the outside of the connecting end 101 through the sealing groove 204, and the connecting end 101 passes through the extension tube 205 and is connected to the sealing tube 210, and the extension tube 205 is sealed and fixedly connected to the sealing tube 210 through the first sealing ring 206. When the extension tube 205 is connected to the first sealing gasket 207, it is sealed to the first sealing gasket 207 through the first sealing ring 206, thereby making the connection between the extension tube and the first sealing gasket 207 more stable. The inner side of the second sealing shell 202 is provided with a tight-fitting cover 209, and the inner side of the tight-fitting cover 209 is sealed and fixedly connected to the first sealing gasket 207. The tight-fitting cover 209 protects the first sealing ring 206 and the first sealing gasket 207. The inner side of the second sealing shell 202 is provided with a tight-fitting block 211, and the second sealing shell 202 is sealed and fixedly connected to the sealing plate 301 in the middle of the second sealing structure 3 through the tight-fitting block 211. When the second sealing shell 202 is connected to the sealing plate 301 in the second sealing structure 3, it can be engaged with the sealing plate 301 by the tight contact block 211 provided inside the second sealing shell 202, so that the sealing plate 301 and the inner side of the second sealing shell 202 form a sealed connection, preventing the external environment from corroding the inside of the second sealing shell 202. The inner side of the sealing plate 301 is fixedly connected to the protective pad 302, and the inner side of the protective pad 302 is fixedly connected to the sealing tube 210. The outer side of the protective pad 302 is fixedly connected to the sealing tube 303. The inner side of the sealing tube 303 is in contact with the second sealing pad 305, and the outer side of the second sealing pad 305 is provided with a pull tab 314. When the hydraulic power unit body 1 and the connecting end 101 need to be disassembled, the user can push the pull plate 314, so that the pull plate 314 pushes the second sealing gasket 305 to disconnect from the connecting end 101, thereby removing the connecting end 101 from the inside of the sealing tube 303. A fixed shaft 307 is provided on the outer side of the sealing plate 301, and a fixed frame 309 is connected to the outer side of the fixed shaft 307. The fixed frame 309 is sealed and fixedly connected to the fixed shaft 307 through a sealing plate 308. A connecting frame 311 is provided on the outer side of the fixed frame 309, and a sealing ring 310 is connected to the bottom of the connecting frame 311. A connecting damper 312 is provided on the outer side of the sealing ring 310 and they are connected to each other. A fitting pad 313 is provided on the inner side of the sealing ring 310. A method for using a valve group sealing assembly structure of a hydraulic power unit includes the following steps: Step 1: Place the hydraulic power unit body 1 inside the first sealing shell 201 in the first sealing structure 2, and fix the first sealing shell 201 by fixing block 103. Then, seal the first sealing shell 201 and the second sealing shell 202 together, so that the sealing membrane 203 inside the second sealing shell 202 blocks and seals the gap at the junction. At the same time, the connecting end 101 will also pass through the sealing groove 204 provided inside the second sealing shell 202 and fit and seal with the extension tube 205. The first sealing gasket 207 will also seal and fix the junction between the sealing groove 204 and the extension tube 205. Step 2: The outer side of the extension tube 205 is fitted with the sealing tube 303 in the second sealing structure 3 through the first sealing ring 206. At the same time, the connecting end 101 is also connected to the valve group inside the sealing tube 303. At this time, the buffer damping 304 inside the sealing tube 303 will apply pressure to the second sealing gasket 305, so that the second sealing gasket 305 is fitted and sealed with the connecting end 101 and the valve group. At the same time, the second sealing ring 306 set inside the second sealing gasket 305 will also fit with the connecting end 101 and the valve group, thereby blocking the gap at the connection. Step 3: The sealing tube 303 seals the interface between the connecting end 101 and the valve group equipment. The fixed shaft 307 can pass through the sealing plate 301 and be fixedly connected to the second sealing shell 202, thereby further limiting the sealing plate 301. Then, the fixing frame 309 can be fixedly connected to the fixing shaft 307 through the sealing plate 308, thereby allowing the fixing frame 309 to drive the upper and lower sealing rings 310 to move to the appropriate position. Then, the inner side of the two sealing rings 310 will be sealed and fixedly connected to the valve group equipment through the fitting gasket 313, thereby fixing and limiting the valve group equipment, so that the connecting end 101 of the hydraulic power unit body 1 remains stable when connected to the valve group equipment. Step 4: After the valve assembly is fixed by the sealing ring 310, the sealing ring 310 will fit with the valve assembly through the fitting pad 313, thereby blocking the gap between the two. The fixing shaft 307 and the fixing bracket 309 will also support the two sets of sealing rings 310. During disassembly, the two sets of sealing rings 310 are pulled, so that the connection damping 312 between the sealing rings 310 extends to disassemble the valve assembly.

[0027] This completes a series of tasks. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0028] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A valve group sealing assembly structure for a hydraulic power unit, comprising a hydraulic power unit body (1) and a first sealing structure (2) disposed on the outside of the hydraulic power unit body (1), wherein a connecting end (101) is provided on the outside of the hydraulic power unit body (1). Its features are: The first sealing structure (2) includes a first sealing shell (201), and the first sealing shell (201) is sealed to the inside of the hydraulic power unit body (1). A second sealing shell (202) is provided on the outside of the first sealing shell (201). A sealing groove (204) is provided inside the second sealing shell (202). An extension tube (205) is provided on the outside of the sealing groove (204). A first sealing ring (206) is provided on the outside of the extension tube (205). A first sealing gasket (207) is provided on the outside of the first sealing ring (206). A protective shell (208) is installed on the outside of the first sealing gasket (207). The first sealing structure (2) is provided with a second sealing structure (3) inside, and the second sealing structure (3) includes a sealing plate (301), and a protective pad (302) is provided on the inner side of the sealing plate (301), and a sealing tube (303) is connected to the inner side of the protective pad (302), and a buffer damper (304) is provided inside the sealing tube (303), and a second sealing pad (305) is connected to the inner side of the buffer damper (304), and a second sealing ring (306) is provided on the inner side of the second sealing pad (305).

2. The valve group sealing assembly structure of the hydraulic power unit according to claim 1, characterized in that, The hydraulic power unit body (1) is provided with heat dissipation fins (102) on the outside, and the heat dissipation fins (102) are sealed to the first sealing shell (201). The first sealing shell (201) is provided with a fixing block (103) on the outside, which is connected to the hydraulic power unit body (1).

3. The valve group sealing assembly structure of the hydraulic power unit according to claim 2, characterized in that, The first sealing shell (201) is sealed to the inside of the second sealing shell (202), and the second sealing shell (202) is provided with a sealing membrane (203), and the sealing membrane (203) can seal and block the gap between the first sealing shell (201) and the second sealing shell (202).

4. The valve group sealing assembly structure of the hydraulic power unit according to claim 3, characterized in that, The second sealing shell (202) is sealed and fitted to the outside of the connecting end (101) through the sealing groove (204), and the connecting end (101) passes through the extension tube (205) and is connected to the sealing tube (210), and the extension tube (205) is sealed and fixedly connected to the sealing tube (210) through the first sealing ring (206).

5. The valve group sealing assembly structure of the hydraulic power unit according to claim 4, characterized in that, The second sealing shell (202) has a sealing cover (209) on its inner side, and the inner side of the sealing cover (209) is sealed and fixedly connected to the first sealing gasket (207), and the sealing cover (209) protects the first sealing ring (206) and the first sealing gasket (207).

6. The valve group sealing assembly structure of the hydraulic power unit according to claim 5, characterized in that, The second sealing shell (202) has a sealing block (211) on its inner side, and the second sealing shell (202) is sealed and fixedly connected to the sealing plate (301) in the middle of the second sealing structure (3) through the sealing block (211).

7. The valve group sealing assembly structure of the hydraulic power unit according to claim 6, characterized in that, The inner side of the sealing plate (301) is fixedly connected to the protective pad (302), and the inner side of the protective pad (302) is fixedly connected to the sealing pipe (210). The outer side of the protective pad (302) is fixedly connected to the sealing pipe (303). The inner side of the sealing pipe (303) is in contact with the second sealing pad (305), and the outer side of the second sealing pad (305) is provided with a pull tab (314).

8. The valve group sealing assembly structure of the hydraulic power unit according to claim 7, characterized in that, The sealing plate (301) has a fixed shaft (307) on its outer side, and a fixed frame (309) is connected to the outer side of the fixed shaft (307). The fixed frame (309) is sealed and fixedly connected to the fixed shaft (307) through a sealing plate (308). The fixed frame (309) has a connecting frame (311) on its outer side, and a sealing ring (310) is connected to the bottom of the connecting frame (311). The sealing ring (310) has a connecting damper (312) connected to each other on its outer side, and a fitting pad (313) is provided on the inner side of the sealing ring (310).

9. The method of using the valve group sealing assembly structure of the hydraulic power unit according to claim 8, characterized in that, Includes the following steps: Step 1: Place the hydraulic power unit body (1) inside the first sealing shell (201) in the first sealing structure (2), and fix the first sealing shell (201) by fixing block (103). Then, seal the first sealing shell (201) and the second sealing shell (202) together, so that the sealing film (203) inside the second sealing shell (202) blocks and seals the gap at the junction. At the same time, the connecting end (101) will also pass through the sealing groove (204) set inside the second sealing shell (202) and fit and seal with the extension tube (205). The first sealing gasket (207) will also seal and fix the junction between the sealing groove (204) and the extension tube (205). Step 2: The outer side of the extension tube (205) is fitted with the sealing tube (303) in the second sealing structure (3) through the first sealing ring (206). At the same time, the connecting end (101) is also connected to the valve group inside the sealing tube (303). At this time, the buffer damping (304) inside the sealing tube (303) will apply pressure to the second sealing gasket (305), so that the second sealing gasket (305) is fitted and sealed with the connecting end (101) and the valve group. At the same time, the second sealing ring (306) set inside the second sealing gasket (305) will also fit with the connecting end (101) and the valve group, thereby blocking the gap at the connection. Step 3: The sealing tube (303) seals the interface between the connecting end (101) and the valve group equipment. The fixed shaft (307) can pass through the sealing plate (301) and be fixedly connected to the second sealing shell (202), thereby further limiting the sealing plate (301). Then, the fixed frame (309) can be fixedly connected to the fixed shaft (307) through the sealing plate (308), thereby allowing the fixed frame (309) to drive the upper and lower sealing rings (310) to move to the appropriate position. Then, the inner side of the two sealing rings (310) will be sealed and fixedly connected to the valve group equipment through the fitting pad (313), thereby fixing and limiting the valve group equipment, so that the connecting end (101) of the hydraulic power unit body (1) remains stable when connected to the valve group equipment. Step 4: After the valve assembly is fixed by the sealing ring (310), the sealing ring (310) will fit with the valve assembly through the fitting pad (313), thereby blocking the gap between the two. The fixed shaft (307) and the fixed frame (309) will also support the two sets of sealing rings (310). When disassembling, pull the two sets of sealing rings (310) to extend the connection damping (312) between the sealing rings (310) to disassemble the valve assembly.

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