Ultralow-temperature butterfly valve
By introducing a pressure balance layer and a multi-layer sealing structure into the butterfly valve, the problem of embrittlement and leakage of sealing materials in low-temperature and high-pressure environments is solved, and higher sealing performance and material durability are achieved.
Patent Information
- Application Number
- CN202422631123.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-08-29
- Estimated Expiration
- 2034-10-30
AI Technical Summary
Traditional sealing materials are prone to brittleness, plastic deformation or damage in extremely low temperature and high pressure environments, resulting in the failure and leakage of butterfly valve seals and the aging rate is accelerated.
The pressure balance layer and multi-layer sealing structure are adopted, including the main sealing layer and the auxiliary sealing layer. Combined with the annular plate and the guide plate design, the fluid isolation and sealing are achieved through the cooperation of the annular groove and the annular cavity, and the sealing effect is maintained with water or low-temperature expansion agent.
It improves the sealing effect of the butterfly valve, avoids leakage caused by high pressure, extends the service life of the sealing material, and enhances the reliability of the valve.
Smart Images
Figure CN223282554U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field, in particular to an ultra-low temperature butterfly valve. Background Art
[0002] In the technical field involving ultra-low temperature and high-pressure environments, ensuring reliable sealing of key parts of equipment such as valves and pipe connections is a major challenge. Traditional sealing materials such as rubber, plastic and certain metals often show performance limitations under extreme conditions (such as the -162°C temperature and high pressure encountered during the processing of liquefied natural gas (LNG). These materials may become brittle due to a sharp drop in temperature, or suffer plastic deformation or even breakage due to continuous high pressure. In addition, long-term exposure to such harsh environments significantly accelerates the aging rate of sealing materials, which not only affects the operating efficiency of the valve, but may also cause greater safety risks due to leakage. Utility Model Content
[0003] The present application provides an ultra-low temperature butterfly valve, which solves the technical problems in the prior art that the low temperature environment causes aging of the butterfly valve sealing material and the high pressure inside the valve easily causes leakage.
[0004] The present application provides an ultra-low temperature butterfly valve, including a valve body, an observation port is provided on the valve body, a cover plate is installed on the observation port, a first annular groove is provided at the port of the observation port, a first annular plate is provided on the end surface of the cover plate, the first annular plate is operably inserted into the first annular groove, a first annular cavity is provided on the wall of the first annular groove corresponding to the inner side of the observation port, a second annular cavity is provided on the wall of the first annular plate corresponding to the inner side of the observation port, the first annular cavity and the second annular cavity are provided in correspondence with each other, a pressure balancing layer is provided in the first annular cavity and the second annular cavity, and a seal is provided on the bottom surface of the first annular groove and the wall corresponding to the outer side of the observation port.
[0005] In some embodiments, the pressure balancing layer is water or a low-temperature expansion agent.
[0006] In some embodiments, the seal comprises a main sealing layer and an auxiliary sealing layer, the auxiliary sealing layer is embedded in the bottom surface of the first annular groove, and the main sealing layer is embedded in the first annular groove wall outside the corresponding observation port.
[0007] In some embodiments, the material of the primary sealing layer and the auxiliary sealing layer is one of silicone rubber, polytetrafluoroethylene, and metal sealing materials.
[0008] In some embodiments, an annular plate is provided in the first annular groove, the auxiliary sealing layer is provided on the annular plate, a plurality of blind holes are provided on the bottom surface of the first annular groove, a spring is fixedly provided in the blind hole, and the spring is fixedly connected to the annular plate.
[0009] In some embodiments, a plurality of guide plates are vertically arranged on the outer ring of the observation port, and the guide plates extend out of the observation port, and the inner side walls of the guide plates and the outer side walls of the observation port are located on the same plane.
[0010] In some embodiments, the guide plate extends toward the valve body to form a reinforcing rib, and the reinforcing rib is fixedly connected to the observation port and the valve body.
[0011] The beneficial effects of this application are as follows:
[0012] The ultra-low temperature butterfly valve provided by the utility model cooperates with the first annular plate and the first annular groove so that the seal seals the observation port, the pressure balance layer blocks the fluid in the valve body, and isolates the fluid in the valve body from the seal, reducing the impact of high pressure on the seal, thereby improving the sealing effect of the valve, and avoiding leakage caused by high pressure inside the valve. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention.
[0014] Figure 1 This is one of the overall structural diagrams of the ultra-low temperature butterfly valve provided in this application;
[0015] Figure 2 Schematic diagram of the ultra-low temperature butterfly valve cover plate in the open state provided for this application;
[0016] Figure 3 Schematic diagram of the cover plate structure of the ultra-low temperature butterfly valve provided in this application;
[0017] Figure 4 A partial cross-sectional view of the valve body of the ultra-low temperature butterfly valve provided in this application;
[0018] Figure 5 for Figure 4 Enlarged view of point A in the middle;
[0019] Figure 6 This is the second schematic diagram of the overall structure of the ultra-low temperature butterfly valve provided in this application.
[0020] Among them, 1-valve body; 2-observation port; 3-cover plate; 4-first annular groove; 5-first annular plate; 6-first annular cavity; 7-second annular cavity; 8-pressure balance layer; 9-main sealing layer; 10-auxiliary sealing layer; 11-annular plate; 12-blind hole; 13-spring; 14-guide plate; 15-reinforcement rib. DETAILED DESCRIPTION
[0021] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.
[0022] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0023] In addition, the descriptions of "first", "second", etc. in this application are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.
[0024] The embodiment of the present application provides an ultra-low temperature butterfly valve, which solves the technical problems in the prior art that the low temperature environment causes aging of the butterfly valve sealing material and the high pressure inside the valve easily causes leakage.
[0025] The technical solution in the embodiments of the present application is to solve the above technical problems, and the overall idea is as follows:
[0026] like Figure 1-Figure 3 , Figure 4 、 Figure 5 As shown, the present application provides an ultra-low temperature butterfly valve, including a valve body 1, an observation port 2 is provided on the valve body 1, a cover plate 3 is installed on the observation port 2, a first annular groove 4 is provided at the port of the observation port 2, a first annular plate 5 is provided on the end face of the cover plate 3, the first annular plate 5 can be operably inserted into the first annular groove 4, a first annular cavity 6 is provided on the wall on the inner side of the first annular groove 4 corresponding to the observation port 2, a second annular cavity 7 is provided on the wall on the inner side of the first annular plate 5 corresponding to the observation port 2, the first annular cavity 6 and the second annular cavity 7 are provided in correspondence with each other, a pressure balancing layer 8 is provided in the first annular cavity 6 and the second annular cavity 7, specifically, the pressure balancing layer 8 is water or a low-temperature expansion agent, and a seal is provided on the bottom surface of the first annular groove 4 and the wall on the outer side of the corresponding observation port 2.
[0027] Through the cooperation of the first annular plate 5 and the first annular groove 4, the seal seals the observation port 2, and the pressure balance layer 8 blocks the fluid in the valve body 1, isolating the fluid in the valve body 1 from the seal, reducing the impact of high pressure on the seal, thereby improving the sealing effect of the valve, and avoiding leakage caused by high pressure inside the valve.
[0028] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.
[0029] Preferably, Figure 4 、 Figure 5 As shown, the seal includes a main sealing layer 9 and an auxiliary sealing layer 10. The auxiliary sealing layer 10 is embedded in the bottom surface of the first annular groove 4, and the main sealing layer 9 is embedded in the wall of the first annular groove 4 outside the corresponding observation port 2. Specifically, the material of the main sealing layer 9 and the auxiliary sealing layer 10 is one of silicone rubber, polytetrafluoroethylene, and metal sealing materials.
[0030] The first annular plate 5 is pressed against the auxiliary sealing layer 10 to play a primary sealing role, and the side surface of the first annular plate 5 contacts the primary sealing layer 9 to play a secondary sealing role, thereby improving the sealing effect.
[0031] Furthermore, an annular plate 11 is provided in the first annular groove 4, the auxiliary sealing layer 10 is provided on the annular plate 11, and a plurality of blind holes 12 are provided on the bottom surface of the first annular groove 4, a spring 13 is fixedly provided in the blind hole 12, and the spring 13 is fixedly connected to the annular plate 11.
[0032] After the cover plate 3 is installed on the observation port 2, the first annular plate 5 is pressed on the auxiliary sealing layer 10, and the auxiliary sealing layer 10 presses the annular plate 11 downward. The spring 13 enables the first annular plate 5 and the auxiliary sealing layer 10 to always maintain contact, compensating for the small gap between the two and improving the sealing effect.
[0033] like Figure 6 As shown, a plurality of guide plates 14 are vertically arranged on the outer ring of the observation port 2, and the ends of the guide plates 14 are provided with chamfers. The guide plates 14 extend out of the observation port 2, and the inner side walls of the guide plates 14 and the outer side walls of the observation port 2 are located on the same plane. Furthermore, the guide plates 14 extend toward the valve body 1 to form reinforcing ribs 15, and the reinforcing ribs 15 are fixedly connected to the observation port 2 and the valve body 1.
[0034] When installing the cover plate 3, the guide plate 14 guides the cover plate 3 to facilitate accurate installation of the cover plate 3. The reinforcing rib 15 strengthens the strength of the observation port 2 to prevent the observation port 2 from deforming due to high pressure and causing sealing failure.
[0035] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.
[0036] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.
Claims
1. A cryogenic butterfly valve, comprising a valve body, an observation port provided on the valve body, a cover plate installed on the observation port, characterized in that: The port of the observation port is provided with a first annular groove, and a first annular plate is provided on the end surface of the cover plate. The first annular plate can be operably inserted into the first annular groove. A first annular cavity is provided on the wall on the inner side of the first annular groove corresponding to the observation port, and a second annular cavity is provided on the wall on the inner side of the first annular plate corresponding to the observation port. The first annular cavity and the second annular cavity are provided in correspondence with each other, and a pressure balancing layer is provided in the first annular cavity and the second annular cavity. A seal is provided on the bottom surface of the first annular groove and the wall on the outer side of the corresponding observation port.
2. The ultra-low temperature butterfly valve according to claim 1, characterized in that: The pressure balance layer is water or a low-temperature expansion agent.
3. The ultra-low temperature butterfly valve according to claim 1, characterized in that: The sealing member includes a main sealing layer and an auxiliary sealing layer. The auxiliary sealing layer is embedded in the bottom surface of the first annular groove, and the main sealing layer is embedded in the first annular groove wall corresponding to the outer side of the observation port.
4. The ultra-low temperature butterfly valve according to claim 3, characterized in that: The material of the main sealing layer and the auxiliary sealing layer is one of silicone rubber, polytetrafluoroethylene, and metal sealing material.
5. The ultra-low temperature butterfly valve according to claim 3, characterized in that: An annular plate is provided in the first annular groove, the auxiliary sealing layer is provided on the annular plate, a plurality of blind holes are provided on the bottom surface of the first annular groove, springs are fixedly provided in the blind holes, and the springs are fixedly connected to the annular plate.
6. The ultra-low temperature butterfly valve according to claim 1, characterized in that: A plurality of guide plates are vertically arranged on the outer ring of the observation port. The guide plates extend out of the observation port, and the inner side walls of the guide plates and the outer side walls of the observation port are located on the same plane.
7. The ultra-low temperature butterfly valve according to claim 6, characterized in that: The guide plate extends toward the valve body to form a reinforcing rib, and the reinforcing rib is fixedly connected to the observation port and the valve body.