Low-temperature valve connecting device
By using a combination of a cantilever-shaped stainless steel bracket, aluminum tubing, and elastic gaskets in the cryogenic valve connection device, the tensile stress problem caused by thermal shrinkage deformation of cryogenic valves is solved, achieving the effects of preventing valve leakage and enhancing system reliability.
Patent Information
- Application Number
- CN202520332102.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2035-02-28
AI Technical Summary
Under dynamic low-temperature conditions, the deformation of low-temperature valves due to differences in thermal shrinkage coefficients generates tensile stress that exceeds the tensile strength limit of aluminum, leading to leakage at the valve flange connection.
A cowhide-shaped stainless steel bracket is used as the support structure, combined with a 200mm long aluminum tube and a stainless steel elastic washer. The support structure provides support force, the aluminum tube increases the pipe length, and the elastic washer absorbs tensile force to prevent valve displacement and leakage.
It effectively counteracts and absorbs the tensile force of the inlet pipeline in a low-temperature environment, prevents the cryogenic valve from tearing and leaking, and improves system safety and operating efficiency.
Smart Images
Figure CN223579084U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to low temperature valve installation technical field, specifically relates to a low temperature valve connecting device. BACKGROUND
[0002] Low temperature valve as the core component of air separation plant, liquefied natural gas (LNG) storage and transportation and low temperature chemical industry etc. field, its reliability directly influences system safety and operating efficiency. At present, the mainstream low temperature valve adopts aluminium material (such as aluminium alloy LF21), and it is widely used because it can keep good toughness below-196 DEG C. However, under dynamic low temperature working condition (such as air separation plant start-stop, temperature sudden change etc.), pipeline and valve will produce significant deformation due to the difference of thermal contraction coefficient. Taking the nitrogen side pressure regulating valve of air separation argon tower condenser as an example, the shrinkage of its inlet pipeline side in-190 DEG C environment can reach 3-5mm, which causes the flange connecting part of valve to bear tensile stress up to 200MP, far exceeding the tensile strength limit (about 150MP) of aluminium material, and further causes tearing leakage.
[0003] Traditional solution mostly relies on static fixed design, for example, through rigid support or thickened flange connection, however, the traditional connecting structure cannot compensate dynamic deformation under low temperature environment, leading to sealing failure under periodic load. SUMMARY
[0004] In order to solve the problem of easy leakage of low temperature valve in prior art, the utility model provides a low temperature valve connecting device, which can prevent low temperature valve from tearing and leaking.
[0005] The utility model discloses a low temperature valve connecting device adopts the technical scheme that:
[0006] A low temperature valve connecting device, including the support structure that is located at the low temperature valve import side and provides the support force to the low temperature valve, and the import of low temperature valve is communicated with the import pipeline through the buffer connecting part, the buffer connecting part includes the aluminium pipe between the import of low temperature valve and import pipeline, and the both ends of aluminium pipe are provided with elastic washer between the import of low temperature valve and import pipeline respectively.
[0007] The utility model technical scheme further improves in that: the support structure includes corbel-shaped stainless steel support, and the corbel-shaped stainless steel support is fixedly arranged on the side of cold box plate.
[0008] The utility model technical scheme further improves in that: the vertical leg of corbel-shaped stainless steel support is located on the outside of low temperature valve import and closely adheres to the outside of low temperature valve import.
[0009] The further improvement in the technical scheme of the utility model lies in that the length of the aluminum pipe is 200mm, and the two ends of the aluminum pipe are communicated with the inlet of the low-temperature valve and the inlet pipeline respectively.
[0010] The further improvement in the technical scheme of the utility model lies in that the elastic gasket is made of stainless steel material and has a preset elastic deformation amount.
[0011] The further improvement in the technical scheme of the utility model lies in that the elastic gasket is also arranged between the aluminum pipe and the inlet pipeline.
[0012] The further improvement in the technical scheme of the utility model lies in that each elastic gasket is sleeved on the corresponding aluminum pipe end portion and the inlet pipeline, the corresponding aluminum pipe end portion and the inlet of the low-temperature valve, and the elastic gasket is in interference fit with the corresponding aluminum pipe end portion and the inlet pipeline, the corresponding aluminum pipe end portion and the inlet of the low-temperature valve.
[0013] The further improvement in the technical scheme of the utility model lies in that the outlet side of the low-temperature valve is communicated with an outlet pipeline, and the outer side of the low-temperature valve is provided with an actuator for controlling the low-temperature valve itself.
[0014] Thanks to the above technical scheme, the technical progress achieved by the utility model includes:
[0015] In the utility model, the support structure can provide support force for the low-temperature valve, the inlet pipeline can generate stretching force on the low-temperature valve when it shrinks and deforms in a low-temperature environment, the stretching force can be offset by the support structure, and the low-temperature valve can be prevented from being displaced under the action of the stretching force; the aluminum pipe in the buffer connecting part can increase the overall length of the inlet pipeline and improve the low-temperature deformation allowance of the inlet pipeline, because the aluminum material has good ductility; the elastic gasket can further absorb the generated stretching force when the inlet pipeline shrinks and deforms, because the stainless steel material has good elasticity.
[0016] In the utility model, the support structure, the aluminum pipe and the elastic gasket can completely absorb the stretching force generated when the inlet pipeline shrinks and deforms, so as to protect the low-temperature valve and prevent the low-temperature valve from tearing and leaking. DRAWINGS
[0017] Figure 1 is a structural schematic view of a low-temperature valve connecting device of the utility model.
[0018] In the drawings: 1, low-temperature valve; 11, inlet pipeline; 12, outlet pipeline; 13, actuator; 2, support structure;
[0019] 3, buffer connecting part; 31, aluminum pipe; 32, elastic gasket;
[0020] 4. A cold box panel. DETAILED DESCRIPTION
[0021] In order to make the purpose, technical scheme and advantages of the utility model more clear and intelligible, the utility model will be further explained in detail below in combination with specific implementation manners and with reference to the drawings. In the following description, the description of the known structure and technology is omitted to avoid unnecessary confusion of the concept of the utility model.
[0022] Reference Figure 1 It can be known that the utility model includes an inlet pipeline 11 communicated with the inlet of the low-temperature valve 1 and an outlet pipeline 12 communicated with the outlet of the low-temperature valve 1, and the outer side of the low-temperature valve 1 is arranged on an actuator 13 used for controlling the low-temperature valve 1 itself.
[0023] In the utility model, the inlet side of the low-temperature valve 1 is further provided with a support structure 2 used for providing a supporting force for the low-temperature valve 1, the support structure 2 can adopt a commonly used bracket in the prior art, when the bracket is adopted, the support part of the bracket is fixedly installed on the side of the cold box panel 4, and the connecting mode between the support part of the bracket and the cold box panel 4 can adopt the connecting mode such as welding or bolt connection commonly used in the prior art; meanwhile, the vertical leg of the bracket is located on the outer side of the inlet of the low-temperature valve 1 and closely adheres to the outer side of the low-temperature valve 1.
[0024] In the utility model, the inlet of the low-temperature valve 1 is communicated with the inlet pipeline 11 through the buffering connecting part 3, the buffering connecting part 3 includes the 200mm long aluminum pipe 31 located between the inlet of the low-temperature valve 1 and the inlet pipeline 11, one end of the aluminum pipe 31 is communicated with the inlet of the low-temperature valve 1 through the elastic gasket 32, the elastic gasket 32 is sleeved on the outer side of the inlet of the low-temperature valve 1 and the aluminum pipe 31, and the elastic gasket 32 is interference fit between the inlet of the low-temperature valve 1 and the aluminum pipe 31. Meanwhile, the other end of the aluminum pipe 31 can be connected with the inlet pipeline 11 through a flange, or the flange can be replaced by the elastic gasket 32, the elastic gasket 32 is also sleeved on the outer side of the inlet pipeline 11 and the aluminum pipe 31, and the elastic gasket 32 is interference fit between the inlet pipeline 11 and the aluminum pipe 31. In the utility model, the elastic gasket 32 is made of stainless steel material and has a certain elastic deformation amount.
[0025] The working principle of the low-temperature valve connecting device in the embodiment is as follows:
[0026] First, according to the support structure 2 and the buffer connecting part 3 are installed according to the requirements, when the inlet pipeline 11 is contracted and deformed in low temperature environment, the tensile force is generated to the cryogenic valve 1, at this time, under the cooperation of the support structure 2, the aluminum pipe 31 and the elastic washer 32, the tensile force generated when the inlet pipeline 11 is contracted and deformed can be completely absorbed, so as to protect the cryogenic valve 1, and the purpose of preventing the cryogenic valve 1 from tearing and leaking is achieved.
[0027] In the above embodiment, the utility model provides a kind of cryogenic valve connecting device, and the support structure provided in the utility model can provide support force to cryogenic valve, when inlet pipeline is contracted and deformed in low temperature environment, tensile force is generated to cryogenic valve, since the existence of support structure can offset part of tensile force, it can also prevent cryogenic valve from displacement under the action of tensile force;In the utility model, the aluminum pipe in the buffer connecting part can increase the overall length of inlet pipeline, so as to improve the cryogenic deformation allowance of inlet pipeline;By setting the elastic washer, the tensile force generated when inlet pipeline is contracted and deformed can be further absorbed.
[0028] The above-described embodiments are merely preferred embodiments of the utility model, and do not limit the concept and scope of the utility model. Without departing from the design concept of the utility model, various modifications and improvements to the technical solutions of the utility model made by those skilled in the art shall fall within the protection scope of the utility model, and the technical content claimed by the utility model has been fully recorded in the claims.
Claims
1. A cryogenic valve connection device, characterized in that: The system includes a support structure (2) located on the inlet side of the cryogenic valve (1) to provide support for the cryogenic valve (1). At the same time, the inlet of the cryogenic valve (1) is connected to the inlet pipe (11) through a buffer connection component (3). The buffer connection component (3) includes an aluminum tube (31) located between the inlet of the cryogenic valve (1) and the inlet pipe (11). An elastic gasket (32) is provided between the end of the aluminum tube (31) and the inlet of the cryogenic valve (1).
2. The cryogenic valve connection device according to claim 1, characterized in that: The support structure (2) includes a cow-leg-shaped stainless steel bracket, which is fixedly installed on the side of the cold box panel (4).
3. The cryogenic valve connection device according to claim 2, characterized in that: The vertical leg of the cow-leg-shaped stainless steel bracket is located outside the inlet of the cryogenic valve (1) and fits tightly against the outside of the inlet of the cryogenic valve (1).
4. The cryogenic valve connection device according to claim 1, characterized in that: The aluminum tube (31) is 200 mm long, and both ends of the aluminum tube (31) are connected to the inlet of the low-temperature valve (1) and the inlet pipe (11) respectively.
5. A cryogenic valve connection device according to claim 1, characterized in that: The elastic washer (32) is made of stainless steel and has a preset elastic deformation.
6. A cryogenic valve connection device according to claim 1, characterized in that: An elastic gasket (32) is also provided between the aluminum tube (31) and the inlet pipe (11).
7. A cryogenic valve connection device according to claim 6, characterized in that: Each of the elastic washers (32) is fitted onto the corresponding end of the aluminum tube (31) and the inlet pipe (11), the corresponding end of the aluminum tube (31) and the inlet of the cryogenic valve (1), and the elastic washers (32) are interference-fitted with the corresponding end of the aluminum tube (31) and the inlet pipe (11), the corresponding end of the aluminum tube (31) and the inlet of the cryogenic valve (1).
8. A cryogenic valve connection device according to any one of claims 1-7, characterized in that: The outlet side of the cryogenic valve (1) is connected to an outlet pipe (12), and an actuator (13) for controlling the cryogenic valve (1) itself is provided on the outside of the cryogenic valve (1).