Assembling device for sealing structural part of hydraulic oscillator

Abstract

The invention belongs to the technical field of oil exploitation downhole tools, particularly relates to an assembly device for a sealing structural part of a hydraulic oscillator, and aims to solve the problem of sealing failure of the hydraulic oscillator caused by unreasonable assembly. The device comprises a diameter expander used for uniformly expanding the diameter of the sealing element, a holding device used for reducing the diameter of the sealing element arranged on a piston in a sleeving manner, and a piston horizontal pushing assembly used for assembling the piston with the sealing element into an outer barrel of the hydraulic oscillator. Local damage to the sealing piece and mechanical damage to the piston during assembly can be avoided, the problem of sealing failure caused by assembly of the dynamic sealing structural piece of an existing hydraulic oscillator is solved, the assembly time of the dynamic sealing structural piece is shortened, the service life of a tool is prolonged, the drilling stability is improved, and development of the drilling industry is promoted.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of downhole tooling for oil production, and particularly relates to a sealing structure assembly device for a hydraulic oscillator. BACKGROUND

[0002] In the process of oil and gas drilling, drilling speed-up tools have been more and more widely applied. After a long time of research, a drilling speed-up tool industry integrating tool research and development, processing and manufacturing, maintenance, on-site service and logistics support has been formed. In the drilling speed-up industry, the hydraulic oscillator is one of the main products. The existing hydraulic oscillator is generally mainly composed of a power sub, a valve shaft assembly and an oscillation sub. The working principle is that a screw motor in the power sub drives a valve disc of the valve shaft assembly to rotate continuously, so that the periodic change of the flow area is realized, the pressure is changed, the pressure in the flow passage of the tool is fluctuated, and the oscillation sub is driven to generate reciprocating thrust on the drill string.

[0003] The oscillation sub is an important component of the hydraulic oscillator and is composed of a piston, a sealing member and a disc spring set. The piston and the sealing member are core components and vulnerable parts of the oscillation sub. The sealing member is generally a sealing ring.

[0004] In the existing assembly process of the dynamic sealing structure of the hydraulic oscillator, a screwdriver is usually used to expand the sealing member, the assembly is installed in the piston groove, then the piston is screwed into the threaded rod, butter is applied externally, and finally the piston is knocked into the outer cylinder with a copper rod. This assembly method can cause the sealing member to be unevenly expanded and locally damaged, the centering degree of the knocking operation is poor, and instantaneous impact can be generated, which can easily cause mechanical damage to the sealing member. Due to the unreasonable assembly method of the sealing member, the dynamic sealing structure is often damaged. For the tool, it will directly lead to tool failure, and further cause damage to the piston, the mandrel and the cylinder in the tool, and even cause the whole machine to be scrapped in severe cases. For downhole, the circulation short circuit is forced to drill, the production time is affected, and the risk of drill pipe fracture and falling into the well is increased. SUMMARY

[0005] In order to solve the above problems in the prior art, i.e., the sealing failure of the hydraulic oscillator caused by unreasonable assembly, the application provides a sealing structure assembly device for a hydraulic oscillator.

[0006] The sealing structure assembly device for the hydraulic oscillator provided by the application adopts the following technical scheme:

[0007] The sealing structure assembly device for the hydraulic oscillator comprises a diameter expander for uniformly expanding the diameter of the sealing member, a gripping device for reducing the diameter of the sealing member sleeved on the piston, and a piston push assembly for assembling the piston with the sealing member into the outer cylinder of the hydraulic oscillator.

[0008] The expander comprises a base, a supporting rod mounted on the base, a plurality of sliding rods hinged to the end of the supporting rod, and expansion blocks fixedly connected to the sliding rods;

[0009] The supporting rod is a telescopic rod comprising a first sub-rod and a second sub-rod, the first sub-rod is fixedly connected to the base vertically, the second sub-rod is sleeved on the first sub-rod, and a spring is sleeved on the first sub-rod, one end of the spring is fixedly connected to the base, and the other end is fixedly connected to the end of the second sub-rod;

[0010] A plurality of guide sliding grooves are formed in the base, one end of the sliding rod is inserted into the guide sliding groove and connected therewith, the other end of the sliding rod is hinged to the supporting rod, and the hinged position is located at the upper end of the second sub-rod;

[0011] The expansion block is arc-shaped, the lower end is a flat surface, and the upper end is a sharp end, the expansion blocks on the plurality of sliding rods are gathered into a hemispherical shape and buckled on the base when the spring is in a balanced state; the sliding rods are located inside the expansion blocks; a plurality of stepped surfaces are arranged on the side of the expansion block away from the sliding rods, the thicknesses of the plurality of stepped surfaces on the expansion block decrease from bottom to top; when the plurality of expansion blocks are gathered together, the stepped surfaces on the plurality of expansion blocks are connected together at the same height.

[0012] By adopting the above technical scheme, when the sealing element is expanded in diameter, the sealing element is sleeved on the plurality of expansion blocks, and a suitable stepped surface is selected when sleeving, so that the sealing element is tightly sleeved on the expansion blocks. Then the operator holds and presses down the supporting rod, the supporting rod is contracted to drive the sliding rod to slide, so that the plurality of expansion blocks gathered together are opened, as the plurality of expansion blocks are opened, the stepped surfaces on the expansion blocks at the same height are expanded in diameter, so that the sealing element sleeved on the expansion blocks is uniformly expanded in diameter, a certain deformation is generated, and the expansion process is completed. By providing the water oscillator sealing structure assembly device, when the sealing element is assembled, the sealing element can be uniformly expanded in diameter and uniformly contracted in diameter, and local damage is reduced.

[0013] Optionally, the upper end of the supporting rod is fixedly connected with a supporting block, and the supporting block is arranged outside the expansion block.

[0014] Optionally, the base is fixedly connected with a mounting rod, and a pressing rod aligned with the supporting block and used for pressing down the supporting block is hinged to the upper end of the mounting rod.

[0015] Optionally, a pressing block aligned with the supporting block is fixedly connected to the rod body of the pressing rod.

[0016] By adopting the above technical scheme, the supporting rod can be conveniently pressed down.

[0017] Optionally, the embracing device comprises a mounting cylinder, an adjusting rod is slidably connected to the mounting cylinder, one end of the adjusting rod is fixedly connected to an embracing ring, the embracing ring is in a sheet shape, and the embracing ring is made of elastic material; the embracing ring is arranged outside the mounting cylinder.

[0018] By adopting the above technical scheme, after the sealing member with an enlarged diameter is removed from the expander, the sealing member is sleeved on the piston, and the sealing member is installed at the assembly groove of the piston, so that the sealing member is aligned with the groove. In order to completely fit the sealing member in the assembly groove of the piston, the embracing ring of the embracing device is sleeved on the piston and aligned with the sealing member, the adjusting rod is rotated, the diameter of the embracing ring is reduced, the sealing member is compressed, the diameter of the sealing member is reduced, and finally the sealing member embraces the piston.

[0019] Optionally, the adjusting rod is threadedly connected to the mounting cylinder.

[0020] By adopting the above technical scheme, the movement of the adjusting rod can be conveniently controlled.

[0021] Optionally, the piston flat pushing assembly comprises a bottom plate, an outer cylinder support fixedly connected to the bottom plate, a mounting support fixedly connected to the bottom plate, a fixed block fixedly connected to the mounting support, and a plug rod penetrating through the fixed block, the arrangement height of the plug rod is higher than that of the outer cylinder support, and when the outer cylinder of the hydraulic oscillator is placed on the outer cylinder support, the center of the plug rod is aligned with the center of the outer cylinder of the hydraulic oscillator.

[0022] Both ends of the plug rod penetrate through the fixed block, and one end of the piston installation rod screw is installed between the outer cylinder of the hydraulic oscillator and the plug rod during installation.

[0023] The piston is sleeved on the end portion of the plug rod.

[0024] By adopting the above technical scheme, when the piston flat pushing assembly works, first, the bottom plate is stably placed on the ground or workbench, the outer cylinder of the hydraulic oscillator is stably placed on the outer cylinder support of the piston flat pushing assembly, after being stably placed, the piston after the diameter reduction process is installed at the end portion of the plug rod, the plug rod is pushed to move towards the side of the outer cylinder support, and the piston is pushed into the outer cylinder of the hydraulic oscillator placed on the outer cylinder support in a centered, uniform and slow manner. After the piston is installed to the predetermined position, the plug rod is pulled out of the outer cylinder of the hydraulic oscillator. When the piston is installed, the piston is sleeved on the end portion of the plug rod, and when the piston is installed to the predetermined position, the plug rod is pulled out, the piston is clamped by the outer cylinder of the hydraulic oscillator and separated from the plug rod, so that the piston is prevented from being pulled out together with the plug rod. When the plug rod is pulled out, the outer cylinder of the hydraulic oscillator can be pressed to prevent the outer cylinder of the hydraulic oscillator from moving together with the plug rod.

[0025] Optionally, a baffle is fixedly connected to the bottom plate and vertically arranged, and the baffle and the mounting support are arranged on both sides of the outer cylinder support.

[0026] By adopting the technical scheme, when the water oscillator outer cylinder is placed on the outer cylinder support and the piston is pushed into the water oscillator outer cylinder, the outer cylinder is pushed by the piston and moves away from the insertion rod and contacts the baffle, the baffle blocks the water oscillator outer cylinder to avoid the movement of the water oscillator outer cylinder.

[0027] Optionally, a rotating rod is arranged on the fixing block and contacts the insertion rod, and the insertion rod is a rack, and the rotating rod is provided with a tooth that is engaged with the rack of the insertion rod, and the rotating rod is engaged with the insertion rod when the rotating rod is installed on the fixing block.

[0028] By adopting the technical scheme, the rotating rod is arranged, and the rotation of the rotating rod drives the insertion rod to move close to or away from the outer sleeve support under the engagement of the rotating rod and the teeth of the insertion rod, so that the insertion rod can move forward stably.

[0029] Optionally, an end of the rotating rod is provided with a rotating wheel.

[0030] By adopting the technical scheme, the rotating rod can be conveniently rotated.

[0031] Advantages of the present application:

[0032] (1) The water oscillator sealing structure assembly device can avoid local damage of the sealing element and mechanical damage of the piston during assembly, solve the sealing failure problem caused by assembly of the dynamic sealing structure of the water oscillator, reduce the assembly time of the dynamic sealing structure, prolong the service life of the tool, improve the drilling stability, and promote the development of the drilling industry.

[0033] (2) The gripping device is arranged to facilitate installation of the sealing element on the piston.

[0034] (3) The piston flat pushing assembly is arranged to facilitate installation of the piston in the water oscillator outer cylinder. BRIEF DESCRIPTION OF DRAWINGS

[0035] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments made with reference to the accompanying drawings:

[0036] Figure 1 It is a schematic view of the expander in the embodiment;

[0037] Figure 2 It is a schematic view of the inside of the expander in the embodiment;

[0038] Figure 3 It is a schematic view of the gripping device in the embodiment;

[0039] Figure 4It is a schematic view of the piston flat push assembly in the embodiment.

[0040] Label explanation: 1, expander; 11, base; 12, support rod; 121, first sub-rod; 122, second sub-rod; 123, spring; 13, sliding bar; 14, expansion block; 141, step surface; 15, support block; 16, mounting rod; 17, pressing rod; 18, pressing block; 2, gripper; 21, mounting cylinder; 22, adjusting rod; 23, adjusting handle; 24, gripping ring; 3, piston flat push assembly; 31, outer cylinder support; 32, baffle; 33, mounting support; 34, fixed block; 35, insertion rod; 36, rotating rod; 37, rotating wheel; 38, bottom plate. DETAILED DESCRIPTION

[0041] The application will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related application, and not to limit the application. In addition, it should be noted that only the parts related to the application are shown in the drawings for ease of description.

[0042] It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other without conflict. The application will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0043] The application provides a water force oscillator sealing structure assembly device, which comprises an expander 1, a gripper 2 and a piston flat push assembly 3.

[0044] Reference Figure 1 , Figure 2 The expander 1 is used for uniformly expanding the diameter of the sealing element. The expander 1 comprises a base 11 arranged on the ground or a workbench, a support rod 12 fixedly connected on the base 11, the support rod 12 being a telescopic rod and comprising a first sub-rod 121 and a second sub-rod 122, the first sub-rod 121 being fixedly connected vertically on the base 11, the second sub-rod 122 being sleeved on the first sub-rod 121, and a spring 123 being sleeved on the first sub-rod 121, one end of the spring 123 being fixedly connected with the base 11 and the other end being fixedly connected with the end of the second sub-rod 122.

[0045] A plurality of guide sliding grooves are formed on the base 11, the guide sliding grooves are strip-shaped grooves, and the guide sliding grooves are formed in a direction from the center of the base 11 outward, and there is a spacing between the guide sliding grooves and the center of the base 11. The plurality of guide sliding grooves are arranged at equal intervals along the circumference of the base 11. A sliding strip 13 is installed on the base 11, one end of the sliding strip 13 is inserted into the guide sliding groove and is connected with the guide sliding groove in a matching manner, the sliding strip 13 can slide in the length direction of the guide sliding groove in the guide sliding groove, the other end of the sliding strip 13 is hingedly connected with the support rod 12, and the hinged position is located at the upper end of the second sub-rod 122. When the spring 123 is in a balanced state, the position of the sliding strip 13 in the guide sliding groove is close to the center of the base 11. When the support rod 12 is subjected to a vertically downward force, the second sub-rod 122 moves along the first sub-rod 121 towards the base 11 and presses the spring 123, so that the spring 123 is in a compressed state. Moreover, when the second sub-rod 122 descends, the descent of the second sub-rod 122 pushes the sliding strip 13, so that the sliding strip 13 slides in the length direction of the guide sliding groove.

[0046] An expansion block 14 is fixedly connected to the sliding strip 13, the expansion block 14 is arc-shaped, the lower end is a flat surface, and the upper end is a sharp end. When the spring 123 is in a balanced state, the expansion blocks 14 on the plurality of sliding strips 13 are gathered together and buckled on the base 11 in a hemispherical shape. The sliding strip 13 is inside the expansion block 14. A plurality of stepped surfaces 141 are arranged on the side of the expansion block 14 away from the sliding strip 13, and the thicknesses of the plurality of stepped surfaces 141 on the expansion block 14 decrease from bottom to top. When the plurality of expansion blocks 14 are gathered together, the stepped surfaces 141 on the plurality of expansion blocks 14 are connected together at the same height.

[0047] A support block 15 is fixedly connected to the upper end of the support rod 12, and the support block 15 is arranged outside the expansion block 14. The support rod 12 can be contracted by pressing the support block 15.

[0048] An installation rod 16 is fixedly connected to the base 11, and a pressing rod 17 is hingedly connected to the upper end of the installation rod 16. A pressing block 18 is fixedly connected to the rod body of the pressing rod 17, the pressing block 18 is aligned with the support block 15, and the shapes of the support block 15 and the pressing block 18 can be set to match each other. The other end of the pressing rod 17 is fixedly connected with a pressing handle.

[0049] When the seal is expanded, the seal is sleeved on the plurality of expansion blocks 14, and a suitable step surface 141 is selected when sleeving, so that the seal is tightly sleeved on the expansion block 14. Then the worker holds the down handle, and the pressure rod 17 is pressed down. When the pressure rod 17 is pressed down, the supporting block 15 is pressed down, the supporting block 15 drives the supporting rod 12 to retract, the supporting rod 12 drives the sliding bar 13 to slide, so that the plurality of expansion blocks 14 gathered together are opened, and as the plurality of expansion blocks 14 are opened, the step surface 141 at the same height on the expansion block 14 expands in diameter, so that the seal sleeved on the expansion block 14 uniformly expands in diameter, a certain deformation is generated, and thus the expansion process is completed.

[0050] With reference to Figure 3 , the gripper 2 is used to reduce the diameter of the seal sleeved on the piston, so that the seal can tightly fit the surface of the piston. The gripper 2 comprises a mounting cylinder 21, a adjusting rod 22 is threaded connected to the mounting cylinder 21, one end of the adjusting rod 22 is fixedly connected with an adjusting handle 23, the other end is fixedly connected with a gripping ring 24, and the ring body of the gripping ring 24 is fixedly connected with the end of the adjusting rod 22. The ring surface of the gripping ring 24 is sheet-shaped, and the gripping ring 24 is made of elastic material. The gripping ring 24 is arranged outside the mounting cylinder 21. When the adjusting rod 22 rotates and moves away from the gripping ring 24, the adjusting rod 22 pulls the gripping ring 24, so that part of the gripping ring 24 enters the mounting cylinder 21, and the diameter of the remaining part of the gripping ring 24 outside the mounting cylinder 21 is reduced; when the adjusting rod 22 moves towards the gripping ring 24, the adjusting rod 22 pushes the gripping ring 24, so that the part of the gripping ring 24 entering the mounting cylinder 21 gradually comes out of the mounting cylinder 21, and the remaining part of the gripping ring 24 outside the mounting cylinder 21 is expanded in diameter under the action of the elastic deformation of the gripping ring 24 itself.

[0051] After the seal with the expanded diameter is taken off the expander 1, the seal is sleeved on the piston, and the seal is installed at the assembly groove of the piston, so that the seal is aligned with the groove. In order to completely fit the seal in the assembly groove of the piston, then the gripping ring 24 of the gripper 2 is sleeved on the piston and aligned with the seal, the adjusting rod 22 is rotated, the diameter of the gripping ring 24 is reduced, the seal is compressed, the diameter of the seal is reduced, and finally the seal is gripped on the piston.

[0052] With reference to Figure 4 , the piston pushing assembly 3 is mainly used for assembling the piston with the seal into the outer cylinder of the hydraulic oscillator. The piston pushing assembly 3 comprises a bottom plate 38, an outer cylinder support 31 is fixedly connected to the bottom plate 38, the outer cylinder support 31 is vertically arranged and used for supporting the outer cylinder of the hydraulic oscillator, and a baffle 32 is fixedly connected to the bottom plate 38 and vertically arranged.

[0053] A mounting bracket 33 is fixedly connected to the base plate 38, and the mounting bracket 33 and the baffle 32 are arranged on both sides of the outer cylinder support 31. A fixing block 34 is fixedly connected to the mounting bracket 33, and an insert rod 35 is inserted through the fixing block 34. The height of the insert rod 35 is higher than that of the outer cylinder support 31, and when the outer cylinder of the hydraulic oscillator is placed on the outer cylinder support 31, the center of the insert rod 35 is aligned with the center of the outer cylinder of the hydraulic oscillator. The two ends of the insert rod 35 protrude from the fixing block 34, and the piston equipped with a seal is installed between the outer cylinder of the hydraulic oscillator and the insert rod 35 during installation. The insert rod 35 and the piston are detachably connected, and the piston can be sleeved on the insert rod 35 during installation.

[0054] A rotating rod 36 is inserted through the fixed block 34, and the position of the rotating rod 36 is in contact with the insertion rod 35. The insertion rod 35 is a rack, and the rotating rod 36 has teeth that mesh with the rack of the insertion rod 35. When the rotating rod 36 is installed on the fixed block 34, the rotating rod 36 and the insertion rod 35 are engaged. By rotating the rotating rod 36, under the action of the meshing of the teeth between the rotating rod 36 and the insertion rod 35, the rotation of the rotating rod 36 causes the insertion rod 35 to move closer to or away from the outer bracket. In order to facilitate the rotation of the rotating rod 36, a rotating wheel 37 is installed at the end of the rotating rod 36, and the rotating wheel 37 drives the rotating rod 36 to rotate.

[0055] The piston is assembled using the piston-pushing assembly 3 of this invention. When the piston-pushing assembly 3 is in operation, first, the base plate 38 is placed stably on the ground or workbench. The outer cylinder of the hydraulic oscillator is then placed stably on the outer cylinder support 31 of the piston-pushing assembly 3. After stable placement, the piston, having undergone the diameter reduction process, is installed at the end of the insertion rod 35. The rotating rod 36 engages with the insertion rod 35. The rotating wheel 37 is rotated clockwise, causing the insertion rod 35 to move towards the outer cylinder support 31, thus centering and slowly pushing the piston into the hydraulic oscillator outer cylinder placed on the outer cylinder support 31. The rotating wheel 37 is gently and slowly rocked until the piston is installed in the predetermined position. Then, the rotating wheel 37 is rotated counterclockwise to remove the insertion rod 35 from the hydraulic oscillator outer cylinder. During piston installation, the piston is fitted onto the end of the insertion rod 35. After the piston is installed in the predetermined position, the insertion rod 35 is pulled out. The piston is then engaged by the hydraulic oscillator outer cylinder, separating it from the insertion rod 35 and preventing the insertion rod 35 from pulling out and causing the piston to move. Furthermore, when the outer cylinder of the hydraulic oscillator is placed on the outer cylinder support 31 and the piston is pushed into the outer cylinder, the outer cylinder, pushed by the piston, will move away from the insertion rod 35 and come into contact with the baffle 32. The baffle 32 blocks the outer cylinder of the hydraulic oscillator, preventing it from moving. When the insertion rod 35 is pulled out, the outer cylinder of the hydraulic oscillator can be pressed to prevent it from moving together with the insertion rod 35.

[0056] This application discloses a method for using an assembly device for sealing components of a hydraulic oscillator:

[0057] In the assembly process of the dynamic sealing structure of the hydraulic oscillator, the sealing element is first enlarged using an expander 1. The sealing element is then fitted onto the expansion block 14 of the expander 1, uniformly increasing its diameter. After the enlarged sealing element is inserted into the piston, it will protrude to a certain extent. The clamping device 2 then clamps the sealing element, uniformly reducing its diameter to a suitable size, flush with the piston. Finally, the piston is assembled into the outer cylinder of the hydraulic oscillator. The piston is pushed into the outer cylinder slowly and evenly using the piston pushing assembly 3. Once the piston is in place, the rotating insertion rod 35 is used to remove it from the outer cylinder. This assembly process effectively avoids damage to the dynamic sealing structure during assembly, prevents sealing failure, reduces assembly time, and extends tool life.

[0058] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent in such process, method, article, or apparatus / device.

[0059] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. An assembly device for a sealing structure component of a hydraulic oscillator, characterized in that: It includes an expander (1) for uniformly enlarging the diameter of the seal, a clamp (2) for reducing the diameter of the seal fitted on the piston, and a piston push assembly (3) for assembling the piston with the seal into the outer cylinder of the hydraulic oscillator. The expander (1) includes a base (11), a support rod (12) mounted on the base (11), a plurality of slide bars (13) hinged to the end of the support rod (12), and an expansion block (14) fixedly connected to the slide bars (13); The support rod (12) is a telescopic rod, including a first branch rod (121) and a second branch rod (122). The first branch rod (121) is vertically fixedly connected to the base (11), and the second branch rod (122) is sleeved on the first branch rod (121). A spring (123) is sleeved on the first branch rod (121). One end of the spring (123) is fixedly connected to the base (11), and the other end is fixedly connected to the end of the second branch rod (122). The base (11) is provided with multiple guide grooves. One end of the slide bar (13) is inserted into the guide groove and connected with the guide groove. The other end of the slide bar (13) is hinged to the support rod (12), and the hinged position is located at the upper end of the second branch rod (122). The expansion block (14) is arc-shaped with a flat bottom and a pointed top. When the spring (123) is in equilibrium, the expansion blocks (14) on the multiple slide bars (13) converge into a hemispherical shape and are fastened to the base (11). The slide bars (13) are located inside the expansion blocks (14). The side of the expansion block (14) away from the slide bars (13) is provided with multiple stepped surfaces (141). The thickness of the multiple stepped surfaces (141) on the expansion block (14) decreases from bottom to top. When the multiple expansion blocks (14) converge together, the stepped surfaces (141) on the multiple expansion blocks (14) are connected together at the same height.

2. The assembly device for the sealing structure of a hydraulic oscillator according to claim 1, characterized in that: The upper end of the support rod (12) is fixedly connected to a support block (15), which is arranged on the outside of the expansion block (14).

3. The assembly device for the sealing structure of a hydraulic oscillator according to claim 2, characterized in that: An installation rod (16) is fixedly connected to the base (11), and a pressure rod (17) is hinged to the upper end of the installation rod (16) and is aligned with the support block (15) for pressing down the support block (15).

4. The assembly device for the sealing structure of a hydraulic oscillator according to claim 3, characterized in that: A pressure block (18) is fixedly connected to the rod body of the pressure rod (17), and the pressure block (18) is aligned with the support block (15).

5. The assembly device for the sealing structure of a hydraulic oscillator according to claim 1, characterized in that: The clamping device (2) includes a mounting cylinder (21), on which an adjusting rod (22) is slidably connected. One end of the adjusting rod (22) is fixedly connected to a clamping ring (24). The ring surface of the clamping ring (24) is plate-shaped and made of elastic material. The clamping ring (24) is arranged on the outside of the mounting cylinder (21).

6. The assembly device for a sealing structure of a hydraulic oscillator according to claim 5, characterized in that: The adjusting rod (22) is threadedly connected to the mounting cylinder (21).

7. The assembly device for the sealing structure of a hydraulic oscillator according to claim 1, characterized in that: The piston pushing assembly (3) includes a base plate (38), an outer cylinder support (31) fixedly connected to the base plate (38), a mounting bracket (33) fixedly connected to the base plate (38), a fixing block (34) fixedly connected to the mounting bracket (33), and a plug rod (35) passing through the fixing block (34). The height of the plug rod (35) is higher than that of the outer cylinder support (31), and when the outer cylinder of the hydraulic oscillator is placed on the outer cylinder support (31), the center of the plug rod (35) is aligned with the center of the outer cylinder of the hydraulic oscillator. The two ends of the insert rod (35) protrude from the fixing block (34), and one end of the piston mounting rod (16) screw equipped with the sealing element is installed between the outer cylinder of the hydraulic oscillator and the insert rod (35) during installation. The piston is sleeved on the end of the insert rod (35).

8. The assembly device for the sealing structure of a hydraulic oscillator according to claim 7, characterized in that: A baffle (32) is fixedly connected to the base plate (38), and the baffle (32) is arranged vertically; the baffle (32) and the mounting bracket (33) are arranged on both sides of the outer cylinder bracket (31).

9. The assembly device for the sealing structure of a hydraulic oscillator according to claim 7, characterized in that: A rotating rod (36) is provided on the fixed block (34). The rotating rod (36) is positioned to contact the insert rod (35). The insert rod (35) is a rack. The rotating rod (36) has teeth that mesh with the rack of the insert rod (35). When the rotating rod (36) is installed on the fixed block (34), the rotating rod (36) and the insert rod (35) are meshed and connected.

10. The assembly device for a sealing structure of a hydraulic oscillator according to claim 9, characterized in that: A rotating wheel (37) is installed at the end of the rotating rod (36).

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