CN210687220U - High-pressure ball valve sealing device - Google Patents
High-pressure ball valve sealing device Download PDFInfo
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- CN210687220U CN210687220U CN201921812986.7U CN201921812986U CN210687220U CN 210687220 U CN210687220 U CN 210687220U CN 201921812986 U CN201921812986 U CN 201921812986U CN 210687220 U CN210687220 U CN 210687220U
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- valve rod
- ring
- valve
- valve body
- shaped ring
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Abstract
The utility model discloses a high-pressure ball valve sealing device, which comprises a valve body and a gland connected with the upper part of the valve body, wherein a valve rod runs through the valve body and the gland, a thrust bearing is arranged on the valve rod close to the joint of the upper part and the gland, and a round platform is radially arranged on the outer wall of the valve rod close to the thrust bearing; an upper support ring is arranged on the outer wall of the valve rod at the lower part of the circular truncated cone, and a pressure pad is arranged between the upper support ring and the valve body; an O-shaped ring assembly is arranged at the joint of the valve rod and the valve body at the bottom of the pressure pad, the O-shaped ring assembly comprises an O-shaped ring and a plastic ring arranged between the O-shaped ring and the valve rod, a metal isolating ring is arranged in the middle of the O-shaped ring, and the plastic ring is made of polytetrafluoroethylene materials; and a lower support ring is also arranged at the joint of the valve rod and the valve body at the lower part of the O-shaped ring assembly. Compared with the prior art, the utility model discloses not only promote the security and the reliability of valve, effectively reduced user's maintenance cycle and cost moreover, can better satisfy the user's requirement.
Description
Technical Field
The utility model relates to a technical field is made to the ball valve, concretely relates to high-pressure ball valve sealing device.
Background
The ball valve has characteristics such as the latus rectum is big, fluid resistance is little, the medium passageway is level and smooth, the switch is convenient rapidly, especially the operator can judge the on-off state of ball valve through the handle position, and the ball valve is used commonly in the natural gas filling equipment and is controlled. As an important energy source, the pressure of the ball valve required in the transfer process is higher, namely 25Mpa, and the safety requirement is higher during transfer. Due to frequent use, after the valve is used for several months, the switch operating handle becomes very heavy, the outlet line of part of the valve rod of the ball valve is slightly leaked when the air tightness is checked, and if the outlet line safety accident is not found in time, the outlet line safety accident can be caused. The inspection shows that the O-shaped ring at the valve rod is seriously abraded, and the partial matching surface of the valve rod and the shell is also scratched by friction, namely the valve rod is slightly leaked and the hand feeling is poor.
Disclosure of Invention
In order to solve the technical problem, the utility model aims at providing a high-pressure ball valve sealing device through improving valve rod structure and sealing method, makes the sealed life-span of valve rod obtain obvious improvement, and the operation is felt and is kept nimble light, has not only promoted the security and the reliability of valve, has effectively reduced user's maintenance cycle and cost moreover, can better satisfy the user's requirement.
In order to achieve the above purpose, the utility model adopts the technical scheme that: a high-pressure ball valve sealing device comprises a valve body and a gland connected with the upper part of the valve body, wherein a valve rod penetrates through the valve body and the gland, a thrust bearing is arranged at the position, close to the upper part, of the valve rod, which is combined with the gland, and a circular truncated cone is radially arranged on the outer wall of the valve rod, close to the thrust bearing; an upper support ring is arranged on the outer wall of the valve rod at the lower part of the circular truncated cone, and a pressure pad is arranged between the upper support ring and the valve body; an O-shaped ring assembly is arranged at the joint of the valve rod and the valve body at the bottom of the pressure pad, the O-shaped ring assembly comprises an O-shaped ring and a plastic ring arranged between the O-shaped ring and the valve rod, a metal isolating ring is arranged in the middle of the O-shaped ring, and the plastic ring is made of polytetrafluoroethylene materials; and a lower support ring is also arranged at the joint of the valve rod and the valve body at the lower part of the O-shaped ring assembly.
Furthermore, a dustproof ring is arranged at the joint of the upper part of the valve rod and the gland.
And two semicircular rings are further arranged at the joint of the valve rod and the valve body at the bottom of the lower support ring.
The wall thickness of the plastic ring is 0.2-0.4 mm.
The upper support ring and the lower support ring are both made of polyether-ether-ketone materials.
The utility model adopts the above technical scheme, change common O shape circle into the twice seal structure that has the metal spacer ring in the middle, O shape circle degree of wear reduces, and the apparent light flexibility of feeling during operation handle adds between O shape circle and valve rod and installs the polytetrafluoroethylene plastic ring, and this plastic ring holds the valve rod tightly under the effect of stop pressure, and the volume of compression of O shape circle after the wearing and tearing of being qualified for the next round of competitions replies the compensation of giving the plastic ring, plays the retaining ring effect simultaneously; the thrust bearing is arranged on the upper part of the valve rod, so that the influence of powder generated by the abrasion of the sealing element on the service life of the bearing can be avoided; the valve rod is supported by the upper and lower support rings, so that the valve rod is in a state of smaller friction, and the valve rod is only subjected to the torque between the sphere and the sealing surface of the valve body and the friction generated by the thrust bearing when in work; the circular truncated cone is arranged on the outer wall of the valve rod close to the thrust bearing in the radial direction, so that the valve rod is prevented from being punched out due to overhigh pressure; the two semi-circular rings are clamped on the valve rod, so that all parts can be conveniently assembled into or taken out of the valve body together.
Compared with the prior art, the utility model discloses an improve valve rod structure and sealing method, made the sealed life-span of valve rod obtain obviously improving, the operation is felt and is kept nimble light, has not only promoted the security and the reliability of valve, has effectively reduced user's maintenance cycle and cost moreover, can better satisfy the user requirement.
Drawings
The structure and features of the present invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is a schematic structural diagram of the present invention.
In the attached figure 1, 1 comprises two semi-circular rings, 2 comprises a lower support ring, 3 comprises a valve body, 4 comprises a gland, 5 comprises a metal isolation ring, 6 comprises an O-shaped ring assembly, 7 comprises an upper support ring, 8 comprises a pressure pad, 9 comprises a circular table, 10 comprises a thrust bearing, 11 comprises a dust ring and 12 comprises a valve rod.
Detailed Description
Fig. 1 is an embodiment of the present invention, and discloses a high-pressure ball valve sealing device, which comprises a valve body 3 and a gland 4 connected with the upper part of the valve body 3, wherein a valve rod 12 is arranged inside the valve body 3 and the gland 4 in a penetrating manner, a thrust bearing 10 is arranged on the valve rod 12 near the joint of the upper part and the gland 4, and a circular truncated cone 9 is radially arranged on the outer wall of the valve rod 12 near the thrust bearing 10; an upper support ring 7 is arranged on the outer wall of the valve rod 12 at the lower part of the circular truncated cone 9, and a pressure pad 8 is arranged between the upper support ring 7 and the valve body 3; an O-shaped ring assembly is arranged at the joint of the valve rod 12 and the valve body 3 at the bottom of the pressure pad 8, the O-shaped ring assembly comprises an O-shaped ring 6 and a plastic ring arranged between the O-shaped ring 6 and the valve rod 12, a metal isolation ring 5 is arranged in the middle of the O-shaped ring 6, and the plastic ring is made of polytetrafluoroethylene materials; the lower part of the O-shaped ring assembly is also provided with a lower support ring 2 at the joint of the valve rod 12 and the valve body 3.
Further, a dustproof ring 11 is arranged at the joint of the upper part of the valve rod 12 and the gland 4.
The bottom of the lower support ring 2 is also provided with two semicircular rings at the joint of the valve rod 12 and the valve body 3.
The wall thickness of the plastic ring is 0.2-0.4 mm.
The upper support ring 7 and the lower support ring 2 are both made of polyether-ether-ketone materials.
The utility model adopts the above technical scheme, change common O shape circle into the twice seal structure that has the metal spacer ring in the middle, O shape circle degree of wear reduces, and the apparent light flexibility of feeling during operation handle adds between O shape circle and valve rod and installs the polytetrafluoroethylene plastic ring, and this plastic ring holds the valve rod tightly under the effect of stop pressure, and the volume of compression of O shape circle after the wearing and tearing of being qualified for the next round of competitions replies the compensation of giving the plastic ring, plays the retaining ring effect simultaneously; the thrust bearing is arranged on the upper part of the valve rod, so that the influence of powder generated by the abrasion of the sealing element on the service life of the bearing can be avoided; the valve rod is supported by the upper and lower support rings, so that the valve rod is in a state of smaller friction, and the valve rod is only subjected to the torque between the sphere and the sealing surface of the valve body and the friction generated by the thrust bearing when in work; the circular truncated cone is arranged on the outer wall of the valve rod close to the thrust bearing in the radial direction, so that the valve rod is prevented from being punched out due to overhigh pressure; the two semi-circular rings are clamped on the valve rod, so that all parts can be conveniently assembled into or taken out of the valve body together.
The above description is only for the preferred embodiment of the present invention, and the above specific embodiments are not intended to limit the present invention, and any decoration, modification or equivalent replacement made by those skilled in the art according to the above description all belong to the protection scope of the present invention.
Claims (5)
1. The utility model provides a high-pressure ball valve sealing device, includes valve body and the gland of being connected with valve body upper portion, the inside valve rod that is equipped with, its characterized in that of running through of valve body and gland: a thrust bearing is arranged at the position, close to the upper part of the valve rod, of the joint with the gland, and a circular truncated cone is radially arranged on the outer wall of the valve rod close to the thrust bearing; an upper support ring is arranged on the outer wall of the valve rod at the lower part of the circular truncated cone, and a pressure pad is arranged between the upper support ring and the valve body; an O-shaped ring assembly is arranged at the joint of the valve rod and the valve body at the bottom of the pressure pad, the O-shaped ring assembly comprises an O-shaped ring and a plastic ring arranged between the O-shaped ring and the valve rod, a metal isolating ring is arranged in the middle of the O-shaped ring, and the plastic ring is made of polytetrafluoroethylene materials; and a lower support ring is also arranged at the joint of the valve rod and the valve body at the lower part of the O-shaped ring assembly.
2. The high pressure ball valve seal of claim 1, wherein: and a dustproof ring is arranged at the joint of the upper part of the valve rod and the gland.
3. The high pressure ball valve seal of claim 1, wherein: and two semicircular rings are further arranged at the joint of the valve rod and the valve body at the bottom of the lower support ring.
4. The high pressure ball valve seal of claim 1, wherein: the wall thickness of the plastic ring is 0.2-0.4 mm.
5. The high pressure ball valve seal of claim 1, wherein: the upper support ring and the lower support ring are both made of polyether-ether-ketone materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921812986.7U CN210687220U (en) | 2019-10-28 | 2019-10-28 | High-pressure ball valve sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921812986.7U CN210687220U (en) | 2019-10-28 | 2019-10-28 | High-pressure ball valve sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210687220U true CN210687220U (en) | 2020-06-05 |
Family
ID=70886122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921812986.7U Active CN210687220U (en) | 2019-10-28 | 2019-10-28 | High-pressure ball valve sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210687220U (en) |
-
2019
- 2019-10-28 CN CN201921812986.7U patent/CN210687220U/en active Active
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