A ducted viscous hydraulic damper

Abstract

The present application relates to the technical field of damper, specifically to a pipeline viscous hydraulic damper, comprising a first cylinder component group and a second cylinder component group which are coaxial and separable and are sleeved outside the damper body. The present application sets the first cylinder component group and the second cylinder component group which are nested inside and outside and can be independently disassembled, constructs an integrated maintainable protection system, realizes multi-functional integration such as corrosion protection, active cleaning of core components during maintenance period and efficient heat dissipation during operation period without disassembling the damper body, and significantly improves long-term operation reliability and maintenance convenience in harsh marine environment.

Description

Technical Field

[0001] This invention relates to the field of damper technology, specifically to a pipe viscous hydraulic damper. Background Technology

[0002] Pipeline viscous hydraulic dampers are key engineering vibration reduction devices, widely used in various industrial pipeline systems, especially in harsh environments such as offshore platforms and coastal engineering, to suppress pipeline vibration and displacement caused by fluid pulsation, wind and wave loads and earthquakes, and ensure system safety.

[0003] However, applying traditional viscous dampers to marine environments presents a series of ongoing technical challenges that limit their long-term reliability and life-cycle cost.

[0004] The high salt spray and high humidity of the marine environment pose a continuous corrosion threat to the exposed metal components of the damper, especially the moving piston rod and cylinder surface. Conventional surface coatings are easily damaged under long-term reciprocating motion and friction. Once corrosion occurs, it not only affects the sealing performance but also causes unpredictable drift in the damping force characteristics, ultimately causing its vibration reduction function to fail.

[0005] Traditional dampers are mostly sealed welded or integrated assembly structures. When the external protective coating fails or the internal medium performance deteriorates and maintenance is required, the entire damper must often be completely disassembled from the piping system. This process involves complex pipeline shutdowns, cutting and re-welding, resulting in high maintenance costs, long operation cycles, and significant safety risks in high-altitude or confined offshore platform operating spaces.

[0006] While some existing external protective sleeve solutions can isolate corrosive media to a certain extent, they often sacrifice the damper's heat dissipation capacity and may affect the damper's own degree of freedom of movement due to the fixed connection of the protective sleeve, or make maintenance work equally cumbersome. Summary of the Invention

[0007] In order to overcome the above-mentioned technical problems, the present invention aims to provide a pipeline viscous hydraulic damper to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A pipe viscous hydraulic damper includes a damper body, which has an end plate, a second end plate, a guide rod, and a cylinder. It further includes a first cylindrical component group and a second cylindrical component group, coaxial and separable, sleeved outside the damper body. The first cylindrical component group forms a sealed inner chamber with the damper body, including a split inner shell assembly and a trigger-type check valve mounted thereon. The second cylindrical component group is sleeved outside the first cylindrical component group, forming a sealed outer chamber, including a split outer shell and rubber sealing assemblies at both ends. When the second cylindrical component group is installed in place, it can drive the trigger-type check valve to open, connecting the inner chamber and the outer chamber.

[0010] Preferably, the inner shell assembly includes an outer shell 1 and an inner shell 2 that can slide relative to the outer shell 1, wherein both the outer shell 1 and the inner shell 2 are cylindrical structures split in half.

[0011] Preferably, the two half-cylinders of the first cylindrical shell are fastened together by axially arranged bolts; the two half-cylinders of the second cylindrical shell are kept together by a guide structure set on the split surface and are slidably disposed in the inner cavity of the first cylindrical shell.

[0012] Preferably, the end of the second cylindrical shell away from the first cylindrical shell is provided with an inner plug, and the inner plug is detachably connected to the second cylindrical shell.

[0013] Preferably, the trigger-type check valve includes a valve body, a trigger plate slidably disposed within the valve body, a shaft connected to the trigger plate, and a sealing ball fixed to the end of the shaft; an elastic reset component is provided between the trigger plate and the valve body.

[0014] Preferably, the second cylindrical component assembly further includes a long column fixed to the inner wall of the outer cylinder; when the second cylindrical component assembly is installed in place, the long column abuts against and pushes the trigger plate, causing the sealing ball to disengage from the opening at the bottom of the valve body.

[0015] Preferably, the rubber ring sealing assembly includes an elastic rubber ring and clamping rings at both ends thereof; the two ends of the elastic rubber ring are respectively defined in the grooves corresponding to the end plate one, the end plate two, and the end of the outer cylinder.

[0016] Preferably, the outer cylinder is a bisected cylindrical structure, with the two halves fastened together by bolts.

[0017] Preferably, the outer cylinder is provided with a detachable plug.

[0018] Preferably, the inner chamber and the outer chamber are filled with a medium that has thermal conductivity and corrosion protection functions.

[0019] Preferably, the medium is an insulating and thermally conductive silicone oil-based nanofluid.

[0020] Preferably, both the first cylindrical component group and the second cylindrical component group can be disassembled and replaced independently of the damper body.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] By setting up a first cylinder component group and a second cylinder component group that can be independently disassembled, the protective function is decoupled into inner and outer layers. This design allows for asynchronous and differentiated maintenance based on the degree of corrosion and wear (such as replacing only the outer layer or replacing both the inner and outer layers at the same time), which significantly reduces maintenance costs, operational complexity, and downtime.

[0023] The sealed outer chamber formed by the outer cylinder and the rubber ring seal assembly forms the first static barrier to isolate salt spray and moisture. The inner chamber formed by the inner cylinder shell assembly constitutes the second layer of protection and is controllably connected to the outer chamber through a trigger-type one-way valve. This dual-chamber design significantly improves the redundancy and reliability of protection.

[0024] During the process of changing the medium and refilling the inner chamber, the guide rod and cylinder surface can be automatically flushed by fluid circulation. This process effectively removes contaminants that adhere to the surface when disassembled and exposed, combining the two necessary steps of "maintenance installation" and "cleaning and maintenance" into one, improving the thoroughness and efficiency of maintenance work.

[0025] The medium filling the inner and outer chambers not only serves as a corrosion barrier, but also forms an efficient heat conduction path from the internal heat-generating components (guide rod, piston, cylinder) to the external environment. This design can dissipate the heat generated during the operation of the damper in a timely manner, avoid the damping performance degradation caused by high-temperature aging of the oil, and ensure the performance stability of the damper in long-term operation.

[0026] The trigger-type check valve only opens when the second cylinder component is installed in place and squeezed by the long column, connecting the inner and outer chambers. This design ensures that the inner and outer chambers can be operated independently during maintenance, and that they form an integrated heat conduction and pressure balance system during operation. No additional complex piping and control devices are required, which improves the system's integration and reliability. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the internal structure of the second cylindrical component assembly of the present invention;

[0029] Figure 3 This is a schematic cross-sectional view of the present invention;

[0030] Figure 4 This is a cross-sectional view of the trigger-type check valve portion of the present invention.

[0031] Figure 5 This is a schematic diagram of the trigger-type check valve part of the present invention.

[0032] In the diagram: 01, Viscous damper component assembly; 11, End plate one; 12, Guide rod; 13, Cylinder body; 14, End plate two; 02, First cylinder component assembly; 21, Inner cylinder shell assembly; 211, Cylinder shell one; 212, Cylinder shell two; 2121, Inner plug; 22, Trigger-type check valve; 221, Valve body; 222, Trigger plate; 223, Guide plate; 224, Shaft; 225, Sealing ball; 201, Inner chamber; 03, Second cylinder component assembly; 31, Outer cylinder; 32, Rubber ring seal assembly; 321, Elastic rubber ring; 322, Hoop ring; 33, Long column; 301, Outer chamber. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] One embodiment provided by the present invention:

[0035] A pipe viscous hydraulic damper includes an end plate 11 and an end plate 14. The end plate 11 is fixedly connected to a guide rod 12, and the end plate 14 is fixedly connected to a cylinder 13. The guide rod 12 contacts the cylinder 13 via a piston. The device also includes:

[0036] First cylindrical component group 02 and second cylindrical component group 03.

[0037] The first cylindrical component group 02 includes an inner cylinder shell assembly 21 and a trigger-type one-way valve 22.

[0038] The inner shell assembly 21 includes a first shell 211, and a second shell 212 is slidably connected inside the first shell 211. The first shell 211 is a bisected cylindrical structure, which is divided into two symmetrical half-cylinders along the axial direction. The two half-cylinders are connected by bolts arranged along the axial direction, thereby forming a complete rigid outer cylinder. This design allows the first shell 211 to be conveniently wrapped around the outside of the installed damper on site without disassembling the viscous damper component assembly 01.

[0039] The second cylindrical shell 212 is also a bisected cylindrical structure, with its outer diameter slightly smaller than the inner diameter of the first cylindrical shell 211, allowing the second cylindrical shell 212 to be slidably fitted into the inner cavity of the first cylindrical shell 211. After the two halves of the second cylindrical shell 212 are closed, they are not rigidly connected by fasteners, but rather maintained in a closed state by their own structure, such as guide flanges and grooves on the bisecting surface, allowing for limited relative sliding along the axial direction within the first cylindrical shell 211.

[0040] The trigger-type one-way valve 22 includes a valve body 221, which is fixedly connected to the cylindrical shell 211. The valve body 221 is provided with a trigger plate 222 and a guide plate 223, which are slidably connected. The guide plate 223 is fixedly connected to the inner wall of the valve body 221. A shaft 224 is fixedly connected to the bottom of the trigger plate 222. A sealing ball 225 is fixedly connected to one end of the shaft 224. An opening is provided at the bottom of the valve body 221 corresponding to the sealing ball 225. A spring is connected between the trigger plate 222 and the valve body 221.

[0041] When the trigger plate 222 moves downward, the spring between the trigger plate 222 and the valve body 221 contracts due to stored force. The downward movement of the trigger plate 222 simultaneously drives the shaft 224 and the sealing ball 225 to move downward. When the trigger plate 222 moves downward, the sealing ball 225 releases its blockage of the opening of the valve body 221. When the trigger plate 222 does not move downward, the spring releases its stored force and blocks the sealing ball 225 in the opening of the valve body 221. The trigger-type check valve 22 of this design is similar to a check valve. A passage is only formed when the trigger plate 222 is squeezed downward, thereby connecting the inner chamber 201 and the outer chamber 301.

[0042] The cylindrical structure formed by the first cylindrical shell 211 and the second cylindrical shell 212 forms an inner cavity 201 with the guide rod 12 and the cylinder body 13. An inner plug 2121 is installed at the end of the second cylindrical shell 212 away from the first cylindrical shell 211. The inner plug 2121 is detachably connected to the inner cavity 201 by threads.

[0043] The second cylindrical component group 03 is fitted outside the first cylindrical component group 02. The second cylindrical component group 03 includes an outer cylindrical body 31, and rubber sealing assemblies 32 are provided at both ends of the outer cylindrical body 31.

[0044] An outer cavity 301 is provided between the second cylindrical component group 03 and the first cylindrical component group 02. The rubber ring sealing assembly 32 includes an elastic rubber ring 321, and the two ends of the elastic rubber ring 321 are provided with hoop rings 322.

[0045] The end plate 11 and end plate 2 are provided with grooves corresponding to the elastic rubber rings 321, and the two ends of the outer cylinder 31 are also provided with grooves corresponding to the elastic rubber rings 321.

[0046] One set of rubber sealing assemblies 32 has its elastic rubber ring 321 connected between the end plate 11 and the outer cylinder 31 via a hoop 322, while the other set of rubber sealing assemblies 32 has its elastic rubber ring 321 connected between the outer cylinder 31 and the end plate 14 via a hoop 322. The outer cylinder 31 and the two sets of rubber sealing assemblies 32 form a seal to ensure that the medium in the outer chamber 301 does not leak out.

[0047] The outer cylinder 31 is also a bisected cylindrical structure, which is formed into a complete cylinder by bolts. The outer cylinder 31 is provided with a plug, which is detachably installed on the outer cylinder 31.

[0048] A long column 33 is fixedly connected to the inner wall of the outer cylinder 31, and one end of the long column 33 contacts the trigger plate 222.

[0049] Working principle:

[0050] In actual use, this device is deployed in marine environments for a long time. The outer cylinder 31, which is fitted outside the viscous damper component group 01, is the main protective structure. It can effectively isolate salt spray and prevent the guide rod 12 and cylinder 13 from directly contacting the corrosive medium, which would lead to a decrease in damping performance.

[0051] When maintenance is required, the medium in the outer cylinder 31 and the inner and outer cavities can be replaced. The replacement operation begins by opening the plug on the outer cylinder 31, allowing the medium in the outer chamber 301 and inner chamber 201 to drain through the plug opening under gravity. Next, the clamping ring 322 connecting the outer cylinder 31 to the two sets of rubber sealing assemblies 32 is removed, detaching the outer cylinder 31 from the elastic rubber ring 321. Then, the retaining bolts of the outer cylinder 31 are released, allowing the second cylinder component group 03 to be disassembled and removed. After the second cylinder component group 03 is disassembled, the first cylinder component group 02 is exposed. By removing the retaining bolts of the first shell 211, the first shell 211 and the second shell 212 can be removed from the damper, allowing the residual medium inside to drain. At this point, the viscous damper component group 01 is fully exposed and can be cleaned.

[0052] During reinstallation, firstly, reassemble the first cylindrical component group 02, with the first shell 211 and the second shell 212 surrounding the guide rod 12 and cylinder 13, forming a sealed inner chamber 201. Then, use an injection pump to insert the outlet pipe into the trigger-type check valve 22. The outlet squeezes the trigger plate 222 towards the cylinder 13, causing the shaft 224 and the sealing ball 225 to move downwards, thereby opening the bottom opening of the valve body 221. Start the injection pump to inject clean medium into the inner chamber 201, while simultaneously unscrewing the inner plug 2121. After the medium fills the inner chamber 201, it exits from the opening of the inner plug 2121. Continuing injection for a period of time can flush away any salt that may be adhering to the surfaces of the guide rod 12 and cylinder 13. After flushing, turn off the injection pump and tighten the inner plug 2121. Pull out the injection pipe; the trigger-type check valve 22 resets under spring action, sealing the opening and restoring the inner chamber 201 to a sealed state.

[0053] Then, the second cylinder component assembly 03 is installed, and the outer cylinder 31 is reassembled. At this time, the long column 33 on the inner wall of the outer cylinder 31 will press the trigger plate 222, causing the trigger-type check valve 22 to open again. The end of the elastic rubber ring 321, which is retained on the end plate 11 and the end plate 24, is fitted onto the outer cylinder 31 and tightened with the clamping ring 322 to ensure the formation of a sealed outer chamber 301. Finally, the medium is injected through the opening on the outer cylinder 31, filling the outer chamber 301 and connecting it to the inner chamber 201 through the opened trigger-type check valve 22.

[0054] When the viscous damper component assembly 01 is operating normally, the heat generated by the guide rod 12 driving the piston to slide within the cylinder 13 can be conducted to the outer cylinder 31 and dissipated through the medium in the inner chamber 201 and outer chamber 301. Simultaneously, the medium in both chambers together constitutes a physical and chemical barrier to the internal core moving components. The maintenance of this device is flexible: for short-term replacements, only the second cylinder component assembly 03 needs to be replaced; for long-term use, both the first and second cylinder assemblies can be replaced entirely. This design not only provides effective protection, but its disassembly and assembly process itself can also utilize medium flushing to clean the core components, achieving efficient maintenance without disassembling the main structure.

[0055] 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 pipe viscous hydraulic damper, comprising a damper body, the damper body having an end plate, a second end plate, a guide rod, and a cylinder, characterized in that, Also includes: A first cylindrical component group and a second cylindrical component group, which are coaxial and separable and sleeved on the outside of the damper body; The first cylindrical component assembly forms a sealed inner cavity with the damper body, which includes a split inner shell assembly and a trigger-type check valve mounted thereon. The second cylindrical component assembly is sleeved outside the first cylindrical component assembly, forming a sealed outer cavity between the two, which includes a split outer cylindrical body and rubber sealing assemblies disposed at both ends thereon; When the second cylindrical component assembly is installed in place, it can drive the trigger-type one-way valve to open, so that the inner chamber and the outer chamber are connected.

2. The pipe viscous hydraulic damper according to claim 1, characterized in that: The inner shell assembly includes an outer shell 1 and an inner shell 2 that can slide relative to the outer shell 1. Both the outer shell 1 and the inner shell 2 are cylindrical structures that are split in half.

3. A pipe viscous hydraulic damper according to claim 2, characterized in that: The two half-cylinders of the first cylindrical shell are fastened together by axially arranged bolts; the two half-cylinders of the second cylindrical shell are kept together by a guide structure set on the split surface and are slidably disposed in the inner cavity of the first cylindrical shell.

4. A pipe viscous hydraulic damper according to claim 2, characterized in that: The end of the second cylindrical shell away from the first cylindrical shell is provided with an inner plug, and the inner plug is detachably connected to the second cylindrical shell.

5. A pipe viscous hydraulic damper according to claim 1, characterized in that: The trigger-type check valve includes a valve body, a trigger plate slidably disposed within the valve body, a shaft connected to the trigger plate, and a sealing ball fixed to the end of the shaft; an elastic reset component is provided between the trigger plate and the valve body.

6. A pipe viscous hydraulic damper according to claim 5, characterized in that: The second cylindrical component assembly also includes a long column fixed to the inner wall of the outer cylinder; when the second cylindrical component assembly is installed in place, the long column abuts against and pushes the trigger plate, causing the sealing ball to disengage from the opening at the bottom of the valve body.

7. A pipe viscous hydraulic damper according to claim 1, characterized in that: The rubber ring sealing assembly includes an elastic rubber ring and clamping rings at both ends thereof; the two ends of the elastic rubber ring are respectively defined in the grooves corresponding to the end plate one, the end plate two, and the end of the outer cylinder.

8. A pipe viscous hydraulic damper according to claim 1, characterized in that: The outer cylinder is a bisected cylindrical structure, with the two halves fastened together by bolts.

9. A pipe viscous hydraulic damper according to claim 1, characterized in that: The outer cylinder is equipped with a removable plug.

10. A pipe viscous hydraulic damper according to claim 1, characterized in that: The inner chamber and the outer chamber are filled with a medium that has thermal conductivity and corrosion protection functions.

11. A pipe viscous hydraulic damper according to claim 10, characterized in that: The medium is an insulating and thermally conductive silicone oil-based nanofluid.

12. A pipe viscous hydraulic damper according to claim 1, characterized in that: Both the first cylindrical component group and the second cylindrical component group can be disassembled and replaced independently of the damper body.

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