High-pressure sealing structure for valve
By adopting a single threaded connection between the main valve body and the valve cover and a sealing structure of O-ring and ball parts in a high-pressure valve, the problem of more fixing screws and susceptibility to wear is solved, achieving higher sealing performance and less affected parts.
Patent Information
- Application Number
- CN202510462297.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-14
- Publication Date
- 2025-05-13
AI Technical Summary
In the sealing structure of existing high-pressure valves, there are many fixing screw components, which are susceptible to wear and mechanical impact, resulting in a reduction in sealing performance.
The main valve body and the valve cover are connected by a single thread to reduce the number of fixing screws and contact the abutment ring through the O-ring. The ball piece seals the high-pressure interface to enhance the overall sealing effect.
The number of fixing screws is reduced, the contact area is increased, the sealing effect is improved, and the number of components is small, it is not susceptible to mechanical impact, and the sealing performance is high.
Smart Images
Figure CN119982913A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of valves, and in particular to a high-pressure sealing structure for valves. Background Art
[0002] High-pressure valves have been widely used in the fields of superhard material manufacturing, chemical industry, petrochemical industry, processing technology, isostatic processing, ultra-high static pressure extrusion, powder metallurgy, metal forming, geophysics, and geological research. High-pressure valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal, and radioactive media. The main internal component is the opening and closing part, which is a disc-shaped valve plate that rotates around its own axis in the valve body to achieve the purpose of opening, closing, or regulation.
[0003] At present, the high-pressure sealing structure of the valve is usually fixed as a whole by a large number of fixing screws and flanges, etc., but the fixing screws themselves have a force limit. After long-term use, the threads on their surfaces are easily worn. Although the use of a large number of fixing screws can improve the sealing reliability, the number of parts is large and the mechanical impact is greatly affected, which can easily cause the sealing to be damaged. Therefore, the present invention proposes a high-pressure sealing structure for a valve to solve the above problems. Summary of the invention
[0004] The object of the present invention is to provide a high-pressure sealing structure for a valve, so as to solve the problem in the above-mentioned background technology that there are many fixing screw parts and the sealing performance is easily affected.
[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-pressure sealing structure for a valve, comprising: a main valve body and a valve, the main valve body is fixedly connected to the high-pressure interface, the main valve body is connected to the valve cover through a threaded column, the valve cover is connected to the valve through a threaded rod, the valve is connected to a spherical part through an O-ring, and the spherical part is located in the main valve body.
[0006] Preferably, the lower end of the main valve body is fixedly connected to an input pipe, the other end of the input pipe is fixedly connected to a flange, the upper end of the main valve body is provided with a slot, the inner wall of the slot is plugged with an insert ring, the upper end of the insert ring is fixedly connected to the lower end of the valve cover, the lower end of the valve cover is also fixedly connected to a threaded column, the outer ring surface of the valve cover is fixedly connected to a handle, and the diameter of the valve cover is larger than the upper end of the main valve body.
[0007] Preferably, the inner wall of the high-pressure interface is fixedly connected to an abutment ring, the surface of the spherical part contacts the inner ring surface of the abutment ring, the maximum diameter of the spherical part is the same as the diameter of the inner ring surface of the abutment ring, a pressure dividing hole is opened at the lower end of the spherical part, and an O-ring is fixedly connected to the upper end of the spherical part.
[0008] Preferably, the surface of the O-ring is tightly connected to the inner wall of the main valve body, the upper end of the O-ring is fixedly connected to the valve, and the upper end of the abutment ring is in contact with the lower end of the O-ring.
[0009] Preferably, the upper end of the threaded rod is fixedly connected with a second handle, the other end of the threaded rod passes through the valve cover and the threaded column and is rotatably connected to the bearing, and the lower surface of the threaded rod is fixedly connected with a limit plate.
[0010] Preferably, the inner ring surface of the upper end of the valve cover is fixedly connected to an upper closing ring, the inner ring surface of the lower end of the threaded column is fixedly connected to a lower closing ring, the lower end of the threaded rod passes through the midpoint of the upper closing ring, the valve cover, the threaded column and the lower closing ring in sequence, and the threaded rod is threadedly connected to the upper closing ring, the valve cover, the threaded column and the lower closing ring.
[0011] Preferably, the lower end of the bearing is rotatably connected to the valve, and the diameter of the valve and the O-ring is equal to the diameter of the inner wall of the main valve body.
[0012] Preferably, a sealing ring is fixedly connected to the lower end of the valve cover, and the two sides of the sealing ring are respectively connected to a threaded column and an insert ring, the threaded column is threadedly connected to the inner wall of the main valve body, the outer surface of the main valve body is fixedly connected to a fixing ring, the upper surface of the main valve body is fixedly connected to an output pipe, and the other end of the output pipe is fixedly connected to a flange.
[0013] Preferably, the outer ring surface of the valve cover is rotatably connected to a rotating shaft, the surface of the rotating shaft is fixedly connected to a reinforcing hook, and the other end of the reinforcing hook passes through the midpoint of the fixing ring.
[0014] Compared with the prior art, the beneficial effects of the present invention are: through the single threaded connection between the valve cover and the main valve body, the number of fixing screws is reduced, the overall contact area is increased, and the overall sealing effect is improved. At the same time, the O-ring seals the valve by contacting with the abutment ring, and the high-pressure interface is closed by the spherical part. The overall number of components is small, it is not easily affected, and the sealing performance is high. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 2 It is a top view schematic diagram of the main valve body of the present invention; Figure 3 It is a cross-sectional schematic diagram of the main valve body of the present invention; Figure 4 This is a schematic diagram of the interior of the main valve body of the present invention; Figure 5 It is a bottom view of the interior of the main valve body of the present invention; Figure 6 It is a schematic cross-sectional view of the interior of the main valve body of the present invention.
[0016] In the figure: 1. high-pressure interface; 2. main valve body; 3. spherical part; 4. O-ring; 5. valve; 6. threaded rod; 7. bearing; 8. valve cover; 9. threaded column; 10. sealing ring; 11. slot; 12. insert ring; 13. handle one; 14. handle two; 15. limit plate; 16. flange; 17. abutment ring; 18. upper closing ring; 19. lower closing ring; 20. input pipe; 21. rotating shaft; 22. fixing ring; 23. strengthening hook; 24. pressure dividing hole; 25. output pipe. DETAILED DESCRIPTION
[0017] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0018] See also Figures 1 to 6 The present invention provides a technical solution: a high-pressure sealing structure for a valve, comprising: a main valve body 2 and a valve 5, the lower end of the main valve body 2 is fixedly connected to a high-pressure interface 1, and the other end of the high-pressure interface 1 is fixedly connected to an input pipe 20. The liquid or gas entering from the input pipe 20 is usually at a high pressure and a fast flow rate, and the impact force on the pipeline at the bend is relatively large. Therefore, the material of the high-pressure interface 1 is hard, which is convenient for long-term use and can also protect the main valve body 2. The other end of the input pipe 20 is fixedly connected to a flange 16, which is convenient for connecting the input pipe 20 to other pipelines through the flange 16, thereby achieving For the overall internal circulation, a slot 11 is opened at the upper end of the main valve body 2, and an insert ring 12 is inserted into the inner wall of the slot 11. The overall airtightness can be improved by setting the insert ring 12. The upper end of the insert ring 12 is fixedly connected to the lower end of the valve cover 8, and the lower end of the valve cover 8 is also fixedly connected to a threaded column 9, which can be effectively connected and sealed with the main valve body 2 through the threaded column 9. The outer ring surface of the valve cover 8 is fixedly connected with a handle 13, which can facilitate the application of force to the valve cover 8 through the handle 13, so as to make it rotate and thus can be disassembled. The diameter of the valve cover 8 is larger than the upper end of the main valve body 2 to avoid leakage at the side connection.
[0019] The inner wall of the high-pressure interface 1 is fixedly connected with an abutment ring 17, and the outer surface of the abutment ring 17 is connected to the inner wall of the high-pressure interface 1. The position of the high-pressure interface 1 is at the bend of the input pipe 20. The abutment ring 17 can limit the flow at some positions in the pipeline, and it is also more conducive to the sealing of the high-pressure interface 1 by the spherical member 3. The surface of the spherical member 3 contacts the inner ring surface of the abutment ring 17, and the inner ring surface of the abutment ring 17 is circular. When the spherical member 3 contacts the inner ring surface of the abutment ring 17, the high-pressure interface 1 can be sealed as a whole. A pressure dividing hole 24 is opened at the lower end of the spherical member 3. By setting the pressure dividing hole 24, the pressure dividing hole 24 can be sealed. The pressure hole 24 can reduce the size of the direct pressure on the surface of the spherical part 3. At the same time, when the valve is opened, the side surface of the spherical part 3 is smooth and round, and it can also perform a flow diversion effect. The maximum diameter of the spherical part 3 is the same as the minimum diameter of the inner wall of the abutment ring 17, and when closing, the lower end of the O-ring 4 will also contact the upper end of the abutment ring 17 to perform sealing. The upper end of the spherical part 3 is fixedly connected with an O-ring 4, and the surface of the O-ring 4 is tightly connected to the inner wall of the main valve body 2 to avoid leakage from the side. The upper end of the O-ring 4 is fixedly connected with a valve 5, and the diameter of the valve 5 is equal to that of the O-ring 4.
[0020] The upper end of the threaded rod 6 is fixedly connected with a handle 2 14, and the threaded rod 6 can be driven to rotate by turning the handle 2 14. The other end of the threaded rod 6 passes through the valve cover 8 and the threaded column 9 and is rotatably connected to the bearing 7. The bearing 7 can reduce the friction resistance when rotating the threaded rod 6 and reduce the workload. The lower end of the bearing 7 is rotatably connected to the upper end of the valve 5. At this time, when the threaded rod 6 rotates, the valve 5 will not rotate due to the friction between the valve 5 and the inner wall of the main valve body 2. The lower surface of the threaded rod 6 is fixedly connected to the limit plate 15, and the limit plate 15 has a certain elasticity When the threaded rod 6 drives the valve 5 to move upward, the limit plate 15 can avoid the possible collision between the bearing 7 and the threaded column 9, so as to protect the valve 5 and the threaded column 9. The diameters of the valve 5 and the O-ring 4 are equal to the diameter of the inner wall of the main valve body 2, so as to ensure that the overall sealing can still be maintained well under high pressure environment. The threaded rod 6 is threadedly connected with the valve cover 8 and the threaded column 9. When the handle 14 is turned, the threaded rod 6 will gradually move upward from the valve cover 8. At this time, the spherical member 3 will also gradually rise and gradually release the blockage of the high-pressure interface 1.
[0021] The lower end of the valve cover 8 is fixedly connected with a sealing ring 10. When the blockage of the high-pressure interface 1 is released, the pressure on the inner wall of the main valve body 2 will increase. At this time, the pressure on the threaded column 9 will increase, and the sealing ring 10 will seal the contact part between the valve cover 8 and the main valve body 2 to increase the overall sealing performance. The two sides of the sealing ring 10 are respectively connected with the threaded column 9 and the insert ring 12. The threaded column 9 is threadedly connected to the inner wall of the main valve body 2. The threaded column 9 is rotated by a handle 13 so that the threaded column 9 is tightly connected to the main valve body 2. The inner ring surface of the upper end of the valve cover 8 is fixedly connected with an upper closing ring 18, and the inner ring surface of the lower end of the threaded column 9 is fixedly connected with a lower closing ring 19. The upper closing ring 18 and the lower closing ring 19 can be used to close the part where the threaded column 9 is connected to the threaded rod 6 to avoid leakage. The lower end of the threaded rod 6 passes through the upper closing ring 18, the valve cover 8, the threaded column 9 and the lower closing ring 19 in turn, and they are all threadedly connected, so as to enhance the overall protection and sealing performance.
[0022] An output pipe 25 is fixedly connected to the upper surface of the main valve body 2, and a flange 16 is fixedly connected to the other end of the output pipe 25. Other devices can be connected through the output pipe 25 and the flange 16. A fixing ring 22 is fixedly connected to the surface of the main valve body 2, and the outer end of the fixing ring 22 is circular. A rotating shaft 21 is fixedly connected to the outer ring surface of the valve cover 8, and a reinforcing hook 23 is fixedly connected to the other end of the rotating shaft 21. The other end of the reinforcing hook 23 passes through the midpoint of the fixing ring 22. When the valve cover 8 becomes loose due to long-term unmaintained operation, the reinforcing hook 23 can enhance the tightness of the connection between the valve cover 8 and the main valve body 2. At the same time, the connection condition of the valve cover 8 and the main valve body 2 can also be judged by observing the tightness of the connection between the reinforcing hook 23 and the fixing ring 22 on a daily basis.
[0023] When the device is working, after checking that the device is correct as a whole, the input pipe 20 and the output pipe 25 are connected to other pipes or devices through the flange 16 respectively, and then the valve cover 8 is installed, and the insertion ring 12 at the lower end of the valve cover 8 is aligned and inserted into the slot 11 at the upper end of the main valve body 2. At the same time, the handle 13 is rotated to allow the threaded column 9 to gradually move down along the main valve body 2 to seal. During this process, the lower end of the sealing ring 10 contacts the main valve body 2, so its upper end is gradually subjected to the pressure of the valve cover 8, so that its contact with the upper end of the main valve body 2 is gradually tight, so that To complete the sealing of the connection, after the installation is completed, rotate the reinforcing hook 23 to hook the fixing ring 22, and then drive the threaded rod 6 to rotate by turning the handle 2 14. During this process, the spherical part 3 will gradually move down along the main valve body 2 and the threaded rod 6 will move vertically. When the spherical part 3 contacts the abutment ring 17, the surface of the spherical part 3 will seal the inner wall of the high-pressure interface 1. At this time, continue to turn the handle 2 14, the contact between the O-ring 4 and the upper end of the abutment ring 17 will gradually become tight, and the O-ring 4 and the valve 5 will seal the inner ring surface of the abutment ring 17 as a whole.
[0024] When it is necessary to release the blockage, it is only necessary to turn the handle 2 14. At this time, the threaded rod 6 will rotate accordingly and drive the spherical part 3 to gradually move upward. During this process, the O-ring 4 gradually breaks away from the contact with the upper end of the abutment ring 17. When the height of the spherical part 3 rises to a height higher than the height of the output pipe 25 or the limit plate 15 contacts the lower sealing ring 19, the blockage of the high-pressure interface 1 can be released. The device has few overall components but high sealing performance. During the up and down movement of the spherical part 3, the upper sealing ring 18 can always keep the connection between the threaded rod 6 and the valve cover 8 airtight to prevent external liquid from penetrating from the gap there, and the lower sealing ring 19 can always seal the threaded connection between the threaded rod 6 and the threaded column 9, so that the liquid or gas entering from the input pipe 20 will not leak at the screw mouth, and the valve 5 can effectively open and close the liquid or gas. The overall operation is simple, and when the device as a whole is hit or accidentally, its internal sealing is still not easily damaged.
[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A high pressure sealing structure for a valve, characterized in that: A high-pressure sealing structure for a valve comprises: a main valve body (2) and a valve (5), wherein the main valve body (2) is fixedly connected to a high-pressure interface (1), the main valve body (2) is connected to a valve cover (8) via a threaded column (9), the valve cover (8) is connected to the valve (5) via a threaded rod (6), the valve (5) is connected to a spherical member (3) via an O-ring (4), and the spherical member (3) is located inside the main valve body (2).
2. A high pressure sealing structure for a valve according to claim 1, characterized in that: The lower end of the main valve body (2) is fixedly connected to an input pipe (20), and the other end of the input pipe (20) is fixedly connected to a flange (16). The upper end of the main valve body (2) is provided with a slot (11), and an insert ring (12) is inserted into the inner wall of the slot (11). The upper end of the insert ring (12) is fixedly connected to the lower end of the valve cover (8). The lower end of the valve cover (8) is also fixedly connected to a threaded column (9). The outer ring surface of the valve cover (8) is fixedly connected to a handle (13). The diameter of the valve cover (8) is larger than the upper end of the main valve body (2).
3. A high pressure sealing structure for a valve according to claim 1, characterized in that: The inner wall of the high-pressure interface (1) is fixedly connected to an abutment ring (17), the surface of the spherical component (3) contacts the inner ring surface of the abutment ring (17), the maximum diameter of the spherical component (3) is the same as the diameter of the inner ring surface of the abutment ring (17), a pressure dividing hole (24) is provided at the lower end of the spherical component (3), and an O-ring (4) is fixedly connected to the upper end of the spherical component (3).
4. A high pressure sealing structure for a valve according to claim 1, characterized in that: The surface of the O-ring (4) is tightly connected to the inner wall of the main valve body (2); the upper end of the O-ring (4) is fixedly connected to the valve (5); and the upper end of the abutment ring (17) is in contact with the lower end of the O-ring (4).
5. A high pressure sealing structure for a valve according to claim 1, characterized in that: The upper end of the threaded rod (6) is fixedly connected to a second handle (14); the other end of the threaded rod (6) passes through the valve cover (8) and the threaded column (9) and is rotatably connected to the bearing (7); and the lower surface of the threaded rod (6) is fixedly connected to a limit plate (15).
6. A high pressure sealing structure for a valve according to claim 1, characterized in that: The inner ring surface of the upper end of the valve cover (8) is fixedly connected to an upper closing ring (18), the inner ring surface of the lower end of the threaded column (9) is fixedly connected to a lower closing ring (19), the lower end of the threaded rod (6) passes through the midpoint of the upper closing ring (18), the valve cover (8), the threaded column (9) and the lower closing ring (19) in sequence, and the threaded rod (6) is threadedly connected to the upper closing ring (18), the valve cover (8), the threaded column (9) and the lower closing ring (19).
7. A high pressure sealing structure for a valve according to claim 5, characterized in that: The lower end of the bearing (7) is rotatably connected to the valve (5), and the diameters of the valve (5) and the O-ring (4) are equal to the diameter of the inner wall of the main valve body (2).
8. A high pressure sealing structure for a valve according to claim 1, characterized in that: The lower end of the valve cover (8) is fixedly connected to a sealing ring (10), and the two sides of the sealing ring (10) are respectively connected to a threaded column (9) and an insert ring (12), the threaded column (9) is threadedly connected to the inner wall of the main valve body (2), the outer surface of the main valve body (2) is fixedly connected to a fixing ring (22), the upper surface of the main valve body (2) is fixedly connected to an output pipe (25), and the other end of the output pipe (25) is fixedly connected to a flange (16).
9. A high pressure sealing structure for a valve according to claim 1, characterized in that: The outer ring surface of the valve cover (8) is rotatably connected to a rotating shaft (21), and a reinforcing hook (23) is fixedly connected to the surface of the rotating shaft (21), and the other end of the reinforcing hook (23) passes through the midpoint of the fixing ring (22).