Hydraulic valve block assembly for hydraulic servo system

Abstract

The invention relates to the technical field of hydraulic valve blocks, and discloses a hydraulic valve block assembly for a hydraulic servo system, the hydraulic valve block assembly comprises a hydraulic valve block body and a pipeline joint, the surface of the hydraulic valve block body is provided with a plurality of pipeline interfaces and a plurality of assembly interfaces, and the pipeline interfaces and the assembly interfaces are internally provided with protective devices. According to the hydraulic valve block, the protection device is arranged, in the dismounting process of oil way pipelines and various assemblies on the hydraulic valve block body, extrusion on the driving assembly can be lost, the driving assembly can drive the shaft rod, the fixing block and the conical blocks to rotate, the multiple sets of conical blocks make contact with one another to be closed, meanwhile, the elastic ring body can reset, and therefore the hydraulic valve block can be dismounted. The valve block is provided with the multiple conical sub-blocks, the multiple conical sub-blocks are tightly attached to the multiple conical sub-blocks, the sealing effect is achieved, after an oil way pipeline and various assemblies are disassembled, communication between the external environment and an oil way in the valve block can be rapidly blocked at the moment when the disassembling action is completed, and dust, metal chippings and other impurities are effectively prevented from entering the valve block.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic valve blocks, in particular to a hydraulic valve block assembly for a hydraulic servo system. Background Art

[0002] The hydraulic servo system is a closed-loop system that uses hydraulic fluid to achieve precise control. Its core is to accurately adjust mechanical movement through the coordination of electrical signals and hydraulic power. Its working principle is: the sensor detects the output (such as displacement, speed, etc.) in real time and feeds it back to the controller, which compares it with the input signal to generate a deviation. After amplification, the deviation drives the hydraulic control valve to control the flow, pressure and direction of the hydraulic oil, and promote the operation of the hydraulic cylinder or hydraulic motor, so that the controlled object moves according to the expected rules.

[0003] The hydraulic valve block used in the hydraulic servo system is a key component in the electro-hydraulic servo hydraulic control system. It plays the role of controlling the flow of hydraulic oil. It is a small circuit that brings together various required valves through the oil holes on the valve block. The motor drives the oil pump to rotate, and the mechanical energy is converted into the pressure energy of the hydraulic oil. The hydraulic oil passes through the hydraulic valve block, and the direction, pressure and flow are adjusted by the hydraulic valve. It is then transmitted to the oil cylinder or oil motor of the hydraulic machinery through the external pipeline, thereby controlling the direction change, force and speed of the hydraulic motor, and driving the hydraulic machinery to do work.

[0004] The existing invention with authorization publication number CN116696879B discloses a hydraulic valve block assembly, comprising a hydraulic valve block body, a plurality of pipe connecting ports and a plurality of valve mounting ports are provided on the hydraulic valve block body, a spring and a pipe positioning member are provided in the pipe connecting port from the inside to the outside, the pipe positioning member comprises a connecting portion, a plurality of arc-shaped elastic portions and a barb portion, the plurality of arc-shaped elastic portions have a gathering portion with a spacing gradually decreasing from the connecting portion to the barb portion, an extrusion ring is provided in the pipe connecting port, a guide groove matching the plurality of gathering portions is provided on the inner wall of the extrusion ring, a pressure driving mechanism is further provided in the pipe connecting port, the movable end of the pressure driving mechanism is connected to the connecting portion by a connecting rod, an inwardly extending convex ring is provided at the end portion of the pipe, and a limiting hole matching the barb portion is provided on the convex ring. This hydraulic valve block assembly can prevent the hydraulic pipe from being disassembled without depressurizing, avoid unnecessary splashing and waste of hydraulic oil, improve the safety of the hydraulic valve block, and solve the problem.

[0005] In the prior art, the hydraulic valve block is assembled with the oil pipe and various components. However, no matter the oil pipe or various components, once they are disassembled during subsequent maintenance or replacement, the interface part on the surface of the hydraulic valve block will be directly exposed to the external environment. If effective sealing measures are not taken in time in this case, external dust, particles and other impurities will take the opportunity to invade the interior of the hydraulic valve block. The entry of such impurities will not only contaminate the hydraulic oil, but may also cause wear or blockage to the hydraulic valve block and its related components, thereby seriously affecting the normal operation of the hydraulic system.

[0006] For this purpose, we propose a hydraulic valve block assembly for a hydraulic servo system. Summary of the Invention

[0007] (1) Technical problems solved

[0008] In response to the shortcomings of the existing technology, the present invention provides a hydraulic valve block assembly for a hydraulic servo system, which solves the problem that once the existing hydraulic valve block, whether it is the oil pipe or various components, is disassembled during subsequent maintenance or replacement, the interface part on the surface of the hydraulic valve block will be directly exposed to the external environment.

[0009] (2) Technical solution

[0010] To achieve the above objectives, the present invention is implemented through the following technical solutions: A hydraulic valve block assembly for a hydraulic servo system, comprising a hydraulic valve block body and a pipe joint, the surface of the hydraulic valve block body is provided with a plurality of pipe interfaces and a plurality of component interfaces, and protective devices are provided in the pipe interfaces and the component interfaces, the protective device comprises a plurality of connectors, the plurality of connectors are respectively threadedly connected to the inner walls of the pipe interfaces and the component interfaces, the surface of the connector is fixedly connected with a sealing gasket, the inner wall of the connector is rotatably connected to a plurality of shafts, a fixed block is fixedly connected to the shaft, the surface of the fixed block is fixedly connected with a conical block, the inner wall of the connector is fixedly connected with an elastic ring body, the inner side of the elastic ring body is pressed and fitted with the surface of the plurality of conical blocks, and the plurality of conical blocks are combined with the elastic ring body to form a sealed space, the connector is provided with a drive assembly that can control the rotation of the shaft, the surface of the connector is provided with a threaded mounting hole that can be threadedly connected to the pipe joint, and the connector is provided with a positioning assembly that can position the drive assembly.

[0011] Preferably, the driving assembly includes a plurality of sliding rods slidably connected to the inner wall of the connecting head, the other end of the sliding rod extends from the inner wall of the connecting head, the other end of the sliding rod is fixedly connected to a rack, the surface of the shaft is fixedly connected to a gear, the gear is meshed with the rack, the surface of the sliding rod is sleeved with a spring, the two ends of the spring are respectively fixedly connected to the sliding rod and the inner wall of the connecting head. Through the above components, when the pipe joint is connected to the threaded mounting hole or the interfaces in various components are aligned with the component interfaces, the sliding rod will be squeezed, and the sliding rod drives the rack to move. At the same time, the spring is squeezed to generate elastic force. When the rack moves, the gear can drive the shaft, fixed block and conical block to rotate. The multiple conical blocks are expanded, and at the same time, the elastic ring body is driven to deform, which can be opened to allow liquid to pass through the connecting head.

[0012] Preferably, the outer surface of the connecting head is provided with an external thread 1, the surface of the external thread 1 is threadedly connected to a threaded ring, the surface of the slide rod is fixedly connected to a protrusion, and the surface of the connecting head is provided with a through hole for the protrusion to slide. Through the above components, when manual opening is required, the threaded ring can be rotated, and the threaded ring cooperates with the external thread 1 to move. During the movement, the threaded ring can push the protrusion, and the protrusion drives the slide rod and the rack to move. At the same time, the spring is squeezed to generate elastic force. When the rack moves, it cooperates with the gear to drive the shaft rod, the fixed block and the conical block to rotate. Multiple conical blocks are unfolded to complete manual operation. When closing, it is only necessary to rotate the threaded ring to reset the threaded ring. The spring drives the protrusion and the slide rod to reset, so that the multiple conical blocks can be closed and sealed with the elastic ring body.

[0013] Preferably, the conical block comprises a block, and a rubber pad is fixedly connected to the outer surface of the block.

[0014] Preferably, the positioning assembly includes a plurality of threaded holes and a plurality of sliding holes provided in the inner wall of the connecting head, the threaded holes are connected to the sliding holes, the inner wall of the threaded hole is threadedly connected with a threaded rod, the inner wall of the sliding hole is slidably connected with a positioning post, one end of the threaded rod is rotatably connected to the upper end of the positioning post, and a positioning groove for the positioning post to be inserted is provided on the surface of the sliding rod. Through the above components, when it is necessary to position the sliding rod in the driving assembly, the threaded rod can be rotated, and the threaded rod cooperates with the threaded hole to drive the positioning post to move on the inner wall of the sliding hole. The positioning post can be inserted into the positioning groove on the surface of the sliding rod to realize positioning of the sliding rod, reduce accidental collision, cause the sliding rod to move, and cause the conical blocks to expand.

[0015] Preferably, an elastic sheet is fixedly connected to the surface of the fixed block, and the four sides of the elastic sheet are respectively fixedly connected to the inner wall of the connecting head. Through the above components, when the fixed block rotates on the shaft, the elastic sheet can be deformed accordingly to achieve sealing of the drive component part.

[0016] Preferably, the elastic ring body is made of a high-performance fluorosilicone rubber elastomer material.

[0017] Preferably, a detachable sealing component is also provided in the threaded mounting hole, and the sealing component includes a sealing cover, and the surface of the sealing cover is provided with external thread 2, and the external thread 2 is threadedly connected to the threaded mounting hole. Through the above components, when the pipeline interface or component interface needs to be completely sealed, the external thread 2 on the surface of the sealing cover can be threadedly connected to the threaded mounting hole, thereby completing the sealing operation of the connector.

[0018] Preferably, a groove is provided on the surface of the sealing cover. Through the above components, when the sealing cover is connected to the threaded mounting hole, the groove can prevent the sealing cover from contacting the sliding rod.

[0019] Preferably, an auxiliary block is fixedly connected to the outer surface of the sealing cover, and the auxiliary block is arranged in a regular hexagon. Through the above components, the regular hexagonal auxiliary block is easy to cooperate with tools, so that the sealing cover can be tightened to improve the sealing effect.

[0020] In summary, the technical effects and advantages of the present invention are as follows:

[0021] 1. In the present invention, by providing a protective device, the oil pipelines and various components on the hydraulic valve block body will lose the squeeze on the drive assembly during the disassembly process, and the drive assembly will drive the shaft, the fixed block and the conical block to rotate, so that the multiple groups of conical blocks are in contact with each other to achieve closure. At the same time, the elastic ring body will also be reset and fit tightly on the multiple conical blocks to achieve a sealing effect. After the oil pipelines and various components are disassembled, the connection between the external environment and the internal oil circuit of the valve block can be quickly blocked at the moment the disassembly action is completed, effectively isolating impurities such as dust and metal debris from entering, reducing the wear and seizure of hydraulic components caused by pollution, and providing reliable protection for the precision oil circuit inside the hydraulic valve block.

[0022] 2. In the present invention, the conical blocks are composed of blocks and rubber pads. The blocks are used to provide structural support and rotational rigidity. The rubber pads are elastic and can fit tightly to the surfaces of adjacent blocks when the conical blocks are closed, filling tiny gaps and forming a tighter sealing surface.

[0023] 3. In the present invention, by rotating the threaded ring and cooperating with the external thread on the surface of the connector, the threaded ring can achieve axial movement and squeeze and push the protrusion, which drives the slide rod and the rack to move, thereby achieving manual opening of multiple cones and improving overall flexibility.

[0024] 4. In the present invention, by setting a positioning component and cooperating with the threaded rod and the threaded hole, the positioning column is accurately inserted into the positioning groove of the slide rod, which can reduce the problem of accidentally hitting the slide rod, causing the tapered blocks to unfold and affecting the protection effect.

[0025] 5. The present invention provides a plugging assembly. When the hydraulic valve block body is not used for a long time, the second external thread on the surface of the sealing cover can be threadedly connected to the threaded mounting hole, thereby completing the plugging operation on the connector and further improving the overall sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of a hydraulic valve block assembly for a hydraulic servo system of the present invention;

[0027] Figure 2 This is a schematic structural diagram of a hydraulic valve block body of a hydraulic valve block assembly for a hydraulic servo system of the present invention;

[0028] Figure 3 This is a schematic structural diagram of a protective device for a hydraulic valve block assembly used in a hydraulic servo system according to the present invention;

[0029] Figure 4 This is a schematic structural diagram from another perspective of a protective device for a hydraulic valve block assembly for a hydraulic servo system according to the present invention;

[0030] Figure 5 This is a schematic cross-sectional view of a protective device for a hydraulic valve block assembly used in a hydraulic servo system according to the present invention;

[0031] Figure 6 A hydraulic valve block assembly for a hydraulic servo system according to the present invention Figure 5 Schematic diagram of the structure at A in the middle;

[0032] Figure 7 This is a partial structural diagram of a protective device of a hydraulic valve block assembly for a hydraulic servo system according to the present invention;

[0033] Figure 8 This is a schematic diagram of a sectional structure of a tapered block in a protective device of a hydraulic valve block assembly for a hydraulic servo system according to the present invention;

[0034] Figure 9 This is a schematic structural diagram of a driving component portion of a hydraulic valve block assembly for a hydraulic servo system according to the present invention;

[0035] Figure 10 This is a structural schematic diagram of a plugging assembly of a hydraulic valve block assembly for a hydraulic servo system according to the present invention;

[0036] Figure 11 A hydraulic valve block assembly for a hydraulic servo system according to the present invention Figure 10 Another perspective structural diagram.

[0037] In the figure: 1. Hydraulic valve block body; 2. Pipe joint; 3. Protective device; 31. Connector; 32. Elastic ring; 33. Shaft; 34. Fixed block; 35. Drive assembly; 351. Slide rod; 352. Spring; 353. Rack; 354. Gear; 355. Threaded ring; 356. External thread one; 357. Bump; 36. Conical block; 361. Block; 362. Rubber pad; 37. Threaded mounting hole; 38. Sealing gasket; 39. Elastic sheet; 310. Positioning assembly; 3101. Threaded hole; 3102. Threaded rod; 3103. Slide hole; 3104. Positioning column; 3105. Positioning groove; 311. Sealing cover; 312. Auxiliary block; 313. External thread two; 314. Groove; 4. Pipe interface; 5. Component interface. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] refer to Figure 1 - Figure 11 The hydraulic valve block assembly for a hydraulic servo system shown includes a hydraulic valve block body 1 and a pipe joint 2. The surface of the hydraulic valve block body 1 is provided with multiple pipe interfaces 4 and multiple component interfaces 5. Protective devices 3 are provided in the pipe interfaces 4 and the component interfaces 5.

[0040] Among them, the protective device 3 includes a plurality of connectors 31, and the plurality of connectors 31 are respectively threadedly connected to the inner walls of the pipeline interface 4 and the component interface 5. The surface of the connector 31 is fixedly connected with a sealing gasket 38. The inner wall of the connector 31 is rotatably connected to a plurality of shafts 33. A fixed block 34 is fixedly connected to the shaft 33. The surface of the fixed block 34 is fixedly connected with a conical block 36. The inner wall of the connector 31 is fixedly connected with an elastic ring body 32. The inner side of the elastic ring body 32 is pressed and fitted with the surface of the plurality of conical blocks 36. The plurality of conical blocks 36 are combined with the elastic ring body 32 to form a A sealed space is formed, the elastic ring body 32 is a high-performance elastomer material of fluorosilicone rubber, the conical block 36 includes a block 361, the outer surface of the block 361 is fixedly connected to a rubber pad 362, and the connecting head 31 is provided with a driving component 35 that can control the rotation of the shaft 33. The surface of the connecting head 31 is provided with a threaded mounting hole 37 that can be threadedly connected to the pipe joint 2. The connecting head 31 is provided with a positioning component 310 that can position the driving component 35. The surface of the fixed block 34 is fixedly connected to an elastic sheet 39, and the four sides of the elastic sheet 39 are respectively fixedly connected to the inner wall of the connecting head 31.

[0041] Among them, the driving assembly 35 includes a plurality of sliding rods 351 that are slidably connected to the inner wall of the connecting head 31, the other end of the sliding rod 351 extends out from the inner wall of the connecting head 31, the other end of the sliding rod 351 is fixedly connected to the rack 353, the surface of the shaft 33 is fixedly connected to the gear 354, the gear 354 is meshed with the rack 353, the surface of the sliding rod 351 is sleeved with a spring 352, the two ends of the spring 352 are respectively fixedly connected to the sliding rod 351 and the inner wall of the connecting head 31, the outer surface of the connecting head 31 is provided with an external thread 356, the surface of the external thread 356 is threadedly connected with a threaded ring 355, the surface of the sliding rod 351 is fixedly connected with a protrusion 357, and the surface of the connecting head 31 is provided with a through hole for the protrusion 357 to slide.

[0042] In this embodiment, when the pipe connector 2 is connected to the threaded mounting hole 37 or the interfaces in various components are aligned with the component interface 5, the slide bar 351 will be squeezed, and the slide bar 351 will drive the rack 353 to move. At the same time, the spring 352 will be squeezed to generate elastic force. When the rack 353 moves, it can cooperate with the gear 354 to drive the shaft 33, the fixed block 34 and the tapered block 36 to rotate. The multiple tapered blocks 36 are unfolded, and at the same time, the elastic ring 32 is deformed, which can open the connector 31 to allow liquid to pass through. When it needs to be opened manually, the threaded ring 355 can be rotated, and the threaded ring 355 cooperates with the external thread 356. During the movement, the threaded ring 355 can push the protrusion 357, and the protrusion 357 drives the slide rod 351 and the rack 353 to move. At the same time, the spring 352 is squeezed to generate elastic force. When the rack 353 moves, it cooperates with the gear 354 to drive the shaft 33, the fixed block 34 and the conical block 36 to rotate. When multiple conical blocks 36 are unfolded, the manual operation can be completed. When closing, just rotate the threaded ring 355 to reset the threaded ring 355. The spring 352 drives the protrusion 357 and the slide rod 351 to reset, so that the multiple conical blocks 36 can be closed and sealed with the elastic ring body 32.

[0043] Among them, the positioning assembly 310 includes a plurality of threaded holes 3101 and a plurality of sliding holes 3103 opened in the inner wall of the connecting head 31, the threaded holes 3101 are connected to the sliding holes 3103, the inner wall of the threaded hole 3101 is threadedly connected with a threaded rod 3102, the inner wall of the sliding hole 3103 is slidingly connected with a positioning column 3104, one end of the threaded rod 3102 is rotatably connected to the upper end of the positioning column 3104, and a positioning groove 3105 for inserting the positioning column 3104 is opened on the surface of the sliding rod 351.

[0044] In this embodiment: when it is necessary to position the slide rod 351 in the drive assembly 35, the threaded rod 3102 can be rotated, and the threaded rod 3102 cooperates with the threaded hole 3101 to drive the positioning column 3104 to move on the inner wall of the slide hole 3103. The positioning column 3104 can be inserted into the positioning groove 3105 on the surface of the slide rod 351 to achieve positioning of the slide rod 351, reduce accidental collisions, and cause the slide rod 351 to move, so that the conical block 36 can be expanded.

[0045] Among them, a detachable sealing component is also provided in the threaded mounting hole 37, and the sealing component includes a sealing cover 311, and an external thread 2 313 is provided on the surface of the sealing cover 311, and the external thread 2 313 is threadedly connected to the threaded mounting hole 37. A groove 314 is provided on the surface of the sealing cover 311, and an auxiliary block 312 is fixedly connected to the outer surface of the sealing cover 311, and the auxiliary block 312 is arranged in a regular hexagon.

[0046] In this embodiment: when it is necessary to completely seal the pipeline interface 4 or the component interface 5, the external thread 2 313 on the surface of the sealing cover 311 is threadedly connected to the threaded mounting hole 37. During the connection process, the groove 314 on the sealing cover 311 is designed to ensure that the sealing cover 311 will not come into contact with the sliding rod 351. In addition, a regular hexagonal auxiliary block 312 is provided on the sealing cover 311. This design facilitates the use of corresponding tools to operate, so that the sealing cover 311 can be firmly tightened, and the sealing cover 311 can be effectively fixed on the threaded mounting hole 37, thereby achieving a complete sealing operation of the connector 31.

[0047] Working principle of the present invention: When using, first, the connector 31 needs to be securely installed in the pipe interface 4 and the component interface 5 respectively. In the initial state, the multiple conical blocks 36 are tightly together to form a complete conical structure. These conical blocks 36 cooperate with the elastic ring body 32 to effectively achieve the effect of sealing and interception, reducing the entry of impurities and dust. When it is necessary to connect the pipeline to various components, the conical blocks 36 and the elastic ring body 32 can be lightly rinsed to ensure that they are clean and free of impurities. Next, when connecting the pipe connector 2 to the threaded mounting hole 37, or aligning the interfaces in various components with the component interfaces 5, it is necessary to ensure that they are squeezed on the sealing gasket 38 to achieve a reliable sealing effect. At the same time, during the connection process, the pipe connector 2 and various components will exert a certain pressure on the slide bar 351. After being squeezed, the slide bar 351 will drive the rack 353 to move accordingly. At this time, the spring 352 will also be squeezed to generate elastic force. As the rack 353 moves, the rack 353 cooperates with the gear 354 to move. The function is to drive the shaft 33, the fixed block 34 and the conical block 36 to rotate synchronously. The multiple conical blocks 36 will gradually expand during the rotation. The conical blocks 36 will also drive the elastic ring body 32 to deform during the rotation, so that it will gradually change from the original closed state to the open state, which is convenient for the smooth circulation of the liquid. When the fixed block 34 rotates on the shaft 33, the elastic sheet 39 will also deform accordingly to achieve the sealing of the driving component 35. In this way, the liquid can smoothly pass through this opened connection The head 31 ensures that the hydraulic valve block body 1 can work normally. When the pipe connector 2 or various components need to be removed, their squeezing effect on the slide bar 351 disappears, and the spring 352 releases its elastic force, driving the slide bar 351 and the rack 353 to reset. The rack 353, under the action of the gear 354, can drive the shaft 33 to rotate in the opposite direction, so that the multiple groups of conical blocks 36 are reclosed. At the same time, the elastic ring body 32 will also reset and fit tightly on the multiple conical blocks 36, thus achieving a sealing effect again and effectively reducing the entry of dust and impurities.

[0048] When the slide bar 351 needs to be positioned, the operator can manually rotate the threaded rod 3102. The threaded rod 3102 and the threaded hole 3101 are tightly matched. The rotation of the threaded rod 3102 can effectively drive the positioning post 3104 to move in the inner wall of the slide hole 3103. The positioning post 3104 can be firmly inserted into the positioning groove 3105 on the surface of the slide bar 351, thereby ensuring that the slide bar 351 is fixed in the required position. This positioning mechanism can not only effectively reduce the accidental movement of the slide bar 351 caused by accidental collision, but also reduce the accidental expansion of the conical block 36 caused by this, thereby ensuring the stability and reliability of the entire protective assembly.

[0049] When the sealing part needs to be opened manually, the threaded ring 355 can be rotated, and the threaded ring 355 cooperates with the external thread 356 to move. During the movement, the threaded ring 355 can push the protrusion 357, and the protrusion 357 drives the slide bar 351 and the rack 353 to move. At the same time, the spring 352 is squeezed to generate elastic force. When the rack 353 moves, it cooperates with the gear 354 to drive the shaft 33, the fixed block 34 and the conical block 36 to rotate. Multiple conical blocks 36 are unfolded to complete the manual operation. When closing, only the threaded ring 355 needs to be rotated to reset the threaded ring 355. The spring 352 drives the protrusion 357 and the slide bar 351 to reset, so that the multiple conical blocks 36 can be closed and sealed with the elastic ring body 32.

[0050] The electrical components mentioned in this article are all connected to an external main controller and 220V mains electricity, and the main controller can be a conventional known device that performs control such as a computer.

[0051] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A hydraulic valve block assembly for a hydraulic servo system, comprising a hydraulic valve block body (1) and a pipe joint (2), wherein a surface of the hydraulic valve block body (1) is provided with a plurality of pipe interfaces (4) and a plurality of component interfaces (5), characterized in that: The pipeline interface (4) and the component interface (5) are both provided with a protective device (3); The protective device (3) comprises a plurality of connectors (31), wherein the plurality of connectors (31) are respectively threadedly connected to the inner walls of the pipeline interface (4) and the component interface (5), a sealing gasket (38) is fixedly connected to the surface of the connector (31), a plurality of shafts (33) are rotatably connected to the inner wall of the connector (31), a fixing block (34) is fixedly connected to the shaft (33), a conical block (36) is fixedly connected to the surface of the fixing block (34), and an elastic ring is fixedly connected to the inner wall of the connector (31). The inner side of the elastic ring body (32) is pressed and fitted with the surfaces of the plurality of conical segments (36), and the plurality of conical segments (36) are combined with the elastic ring body (32) to form a sealed space. The connector (31) is provided with a driving assembly (35) capable of controlling the rotation of the shaft (33). The surface of the connector (31) is provided with a threaded mounting hole (37) capable of being threadedly connected to the pipe joint (2). The connector (31) is provided with a positioning assembly (310) capable of positioning the driving assembly (35).

2. The hydraulic valve block assembly for a hydraulic servo system according to claim 1, characterized in that: The driving assembly (35) includes a plurality of slide rods (351) slidably connected to the inner wall of the connecting head (31), the other end of the slide rod (351) extends from the inner wall of the connecting head (31), the other end of the slide rod (351) is fixedly connected to a rack (353), the surface of the shaft (33) is fixedly connected to a gear (354), the gear (354) is meshed with the rack (353), the surface of the slide rod (351) is provided with a spring (352), the two ends of the spring (352) are respectively fixedly connected to the slide rod (351) and the inner wall of the connecting head (31).

3. The hydraulic valve block assembly for a hydraulic servo system according to claim 2, characterized in that: The outer surface of the connector (31) is provided with an external thread (356), the surface of the external thread (356) is threadedly connected to a threaded ring (355), the surface of the sliding rod (351) is fixedly connected to a protrusion (357), and the surface of the connector (31) is provided with a through hole for the protrusion (357) to slide.

4. The hydraulic valve block assembly for a hydraulic servo system according to claim 1, characterized in that: The conical block (36) comprises a block body (361), and a rubber pad (362) is fixedly connected to the outer surface of the block body (361).

5. The hydraulic valve block assembly for a hydraulic servo system according to claim 2, characterized in that: The positioning assembly (310) includes a plurality of threaded holes (3101) and a plurality of sliding holes (3103) provided in the inner wall of the connector (31); the threaded holes (3101) are connected to the sliding holes (3103); the inner wall of the threaded hole (3101) is threadedly connected to a threaded rod (3102); the inner wall of the sliding hole (3103) is slidably connected to a positioning column (3104); one end of the threaded rod (3102) is rotatably connected to the upper end of the positioning column (3104); and a positioning groove (3105) for inserting the positioning column (3104) is provided on the surface of the sliding rod (351).

6. The hydraulic valve block assembly for a hydraulic servo system according to claim 1, characterized in that: An elastic sheet (39) is fixedly connected to the surface of the fixing block (34), and four sides of the elastic sheet (39) are respectively fixedly connected to the inner wall of the connecting head (31).

7. The hydraulic valve block assembly for a hydraulic servo system according to claim 1, characterized in that: The elastic ring body (32) is made of a high-performance fluorosilicone rubber elastic material.

8. The hydraulic valve block assembly for a hydraulic servo system according to claim 1, characterized in that: A detachable blocking assembly is also provided in the threaded mounting hole (37), and the blocking assembly includes a sealing cover (311). A second external thread (313) is provided on the surface of the sealing cover (311), and the second external thread (313) is threadedly connected to the threaded mounting hole (37).

9. The hydraulic valve block assembly for a hydraulic servo system according to claim 8, characterized in that: A groove (314) is provided on the surface of the sealing cover (311).

10. The hydraulic valve block assembly for a hydraulic servo system according to claim 8, characterized in that: An auxiliary block (312) is fixedly connected to the outer surface of the sealing cover (311), and the auxiliary block (312) is arranged in a regular hexagon.

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