CN218564456U - Low-temperature ball valve - Google Patents
Low-temperature ball valve Download PDFInfo
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- CN218564456U CN218564456U CN202222734501.5U CN202222734501U CN218564456U CN 218564456 U CN218564456 U CN 218564456U CN 202222734501 U CN202222734501 U CN 202222734501U CN 218564456 U CN218564456 U CN 218564456U
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- spheroid
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Abstract
The utility model provides a low temperature ball valve, its elasticity that can strengthen the low reaches sealing ring restores power to the life of extension low reaches sealing ring, the valve leakproofness is good simultaneously. It includes interconnect's valve body and valve body cap, installs the spheroid between valve body and the valve body cap, and the spheroid is connected with the valve rod, is equipped with the low reaches sealing ring between spheroid and the valve body, is equipped with the upper reaches sealing ring between spheroid and the valve body cap, still is equipped with the spring between upper reaches sealing ring and the valve body cap, and inside sunken recess has been seted up to the one end of low reaches sealing ring, and the embedded elastic ring that has of recess, elastic ring are used for making the low reaches sealing ring support the spheroid when the valve is closed.
Description
Technical Field
The utility model relates to a ball valve technical field specifically is a low temperature ball valve.
Background
The low-temperature ball valve has the main characteristics of compact structure, reliable sealing, simple structure, convenient maintenance, difficult erosion by media when the sealing surface and the spherical surface are in a closed state, easy operation and maintenance and wide application in various industries. The low-temperature ball valve is mainly applied to devices in LNG (liquefied natural gas), LPG (liquefied petroleum gas) and air separation industries, has various sizes, is suitable for working temperature of-196 ℃ at the lowest, has an innovative free floating design, and allows upstream pressure to push a ball body to a downstream sealing ring.
Common low temperature ball valve is as shown in fig. 1, the valve body 1 that is located one side is connected with the valve body cap 2 that is located the opposite side through the bolt, install spheroid 3 in valve body 1 and the valve body cap 2, the medium export has been seted up to valve body 1 tip, the medium import has been seted up to the tip of valve body cap 2, whether the passageway that spheroid 3 cavity was controlled spheroid 3 through valve rod 4 rotation spheroid 3 simultaneously with the medium import, the medium export intercommunication thereby realize opening and close of ball valve, when the valve is closed, under the medium pressure effect, upper reaches sealing ring 5 can extrude spheroid 3, and realize spheroid 3 and lower reaches sealing ring 6 soft sealing, so lower reaches sealing ring 6 plays vital function to ball valve seal, traditional lower reaches sealing ring 6 is all that a monoblock imbeds in valve body 1 as shown in fig. 1, because lower reaches sealing ring 6 can open and close the in-process extrusion deformation repeatedly at the valve, simultaneously because low temperature ball valve work is located low temperature environment, can all influence the elastic resilience of lower reaches sealing ring 6, lower reaches sealing ring 6 life, finally lead to valve sealing nature not enough, influence the life of valve.
SUMMERY OF THE UTILITY MODEL
The problem to the low reaches sealing ring life of traditional low temperature ball valve is shorter, can influence valve seal nature, the utility model provides a low temperature ball valve, its elasticity that can strengthen the low reaches sealing ring restores to prolong the life of low reaches sealing ring, valve seal nature is good simultaneously.
The technical scheme is as follows: the utility model provides a low temperature ball valve, its includes interconnect's valve body and valve body cap, the valve body with install the spheroid between the valve body cap, the spheroid is connected with the valve rod, the spheroid with be equipped with the low reaches sealing ring between the valve body, the spheroid with be equipped with upstream sealing ring, its characterized in that between the valve body cap: a spring is further arranged between the upstream sealing ring and the valve body cap, an inwards concave groove is formed in one end of the downstream sealing ring, an elastic ring is embedded into the groove, and the elastic ring is used for enabling the downstream sealing ring to abut against the ball body when the valve is closed.
It is further characterized in that:
an embedded sealing ring is arranged between the valve body and the ball body and is used for being tangent to the ball body when the valve is closed;
the upstream sealing ring, the downstream sealing ring and the embedded sealing ring are made of polychlorotrifluoroethylene;
the valve body is provided with a medium outlet penetrating through the valve body, the valve body cap is provided with a medium inlet penetrating through the valve body cap, a medium channel is arranged in the middle of the ball body, the top of the ball body is provided with a mounting hole, and the valve rod extends into the mounting hole and is connected with the ball body through a screw;
the top of the valve body is connected with a valve cover, the valve rod penetrates through the valve cover and extends into the valve body, a stepped shaft section is arranged on the valve rod, an upper thrust pad is arranged between the upper end of the stepped shaft section and the bottom of the valve cover, a lower thrust pad is arranged between the lower end of the stepped shaft section and the valve body, and a valve rod bearing is further arranged between the valve rod and the valve body;
a packing gap is arranged between the upper part of the valve cover and the valve rod, a packing seat and packing are sequentially arranged in the packing gap from bottom to top, the top end of the valve cover is connected with a packing pressing plate through a packing bolt, and the packing pressing plate is pressed on the packing through a packing pressing cover;
the thrust pad and the valve rod bearing are made of tin bronze;
the spring is a disc spring, and an isolation pad is arranged between the spring and the upstream sealing ring;
the other end of the downstream sealing ring comprises a contact surface positioned in the middle and contacted with the valve body and inclined surfaces positioned at two ends of the contact surface.
The beneficial effects of the utility model are that: by embedding the elastic ring in the middle of the downstream sealing ring, the sealing surface can be more attached to the ball body through the deformation of the elastic ring when the valve is closed and the ball body extrudes the downstream sealing ring, and meanwhile, the elastic restoring force of the downstream sealing ring is enhanced by the elastic ring, so that the service life of the downstream sealing ring is prolonged; the spring is set up in upper reaches sealing ring department, and when the valve was closed, except that medium pressure acted on the spheroid still increased the spring pretightning force to promote the contact of spheroid and low reaches sealing ring and improve sealing performance, in addition, the inserted sealing ring who sets up can provide the second and seal, further promotes valve sealing performance.
Drawings
FIG. 1 is a schematic structural diagram of a conventional low-temperature soft seal ball valve;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is an enlarged view of the point A in FIG. 2;
FIG. 4 is an enlarged view of the point B in FIG. 2;
fig. 5 is an enlarged schematic view of C in fig. 2.
Detailed Description
As shown in fig. 2, the low temperature ball valve includes a valve body 1 and a valve body cap 2 which are connected with each other, a ball body 3 is installed between the valve body 1 and the valve body cap 2, the ball body 3 is connected with a valve rod 4, the ball body 3 is driven to rotate by the valve rod 4, a downstream sealing ring 6 is arranged between the ball body 3 and the valve body cap 1, an upstream sealing ring 5 is arranged between the ball body 3 and the valve body cap 2, as shown in fig. 3, an isolation pad 8 and a disk spring 7 are further arranged between the upstream sealing ring 5 and the valve body cap 2, the disk spring 7 can be used for urging the ball body to press the downstream sealing ring by the spring pretightening force (according to the characteristics of elastic compensation), a concave groove is formed at one end of the downstream sealing ring 6, a metal elastic ring 9 with better elastic restoring force is embedded in the groove, the elastic ring 9 can be made of spring steel and is not easy to deform compared with a sealing ring made of plastic, the elastic ring 9 is used for urging the downstream sealing ring 6 when the valve is closed, namely, the elastic ring 9 is used for urging the ball body to urge the downstream sealing ring 6 to abut against the downstream sealing ring by the elastic force, and the ball body sealing ring 3, thereby urging the downstream sealing ring by the elastic ring 3, and urging the downstream sealing surface of the ball body to urge the ball body to abut against the sealing ring, thereby allowing the sealing ring to adjust the elastic ring by the elastic ring.
In addition, because the main reason that the valve leaks in producing is that the sealing pair produces the deformation under low temperature state and causes, when the medium temperature drops to a certain temperature, the very high sealed face of precision probably produces warpage deformation originally, causes the phenomenon that low temperature seal is not good, still is equipped with inserted sealing ring 10 between valve body 1 and the spheroid 3, and inserted sealing ring 10 is used for being tangent with spheroid 3 when the valve is closed, can form the secondary sealing pair. The upstream seal ring 5, the downstream seal ring 6 and the insert seal ring 10 may be made of polychlorotrifluoroethylene. The other end of the downstream sealing ring 6 comprises a contact surface 24 which is positioned in the middle and is contacted with the valve body and inclined surfaces 25 which are positioned at the two ends of the contact surface 24, so that the sectional area of the downstream sealing ring is reduced, the elastic sealing performance is improved, and the torque is reduced.
The valve body 1 is provided with a medium outlet 11 penetrating through the valve body, the valve body cap 2 is provided with a medium inlet 12 penetrating through the valve body cap, a medium channel 13 is arranged in the middle of the ball body 3, the top of the ball body 3 is provided with a mounting opening, the valve rod 4 extends into the mounting opening and is connected with the ball body 3 through a screw 14 and a spring washer to form an integrated structure, and the impact resistance of the valve rod and the ball body is improved.
The top of the valve body 1 is connected with a valve cover 15, the valve rod 4 penetrates through the valve cover 15 and extends into the valve body 1, a step shaft section is arranged on the valve rod 4, an upper thrust pad 16 is arranged between the upper end of the step shaft section and the bottom of the valve cover 15, a lower thrust pad 17 is arranged between the lower end of the step shaft section and the valve body 1, a valve rod bearing 18 is further arranged between the valve rod 4 and the valve body 1, the thrust pad 17 and the valve rod bearing 18 are made of tin bronze (small in friction coefficient), and the phenomenon that the valve rod is blocked in the rotating process can be prevented when the valve rod is used at a low temperature.
A packing gap is formed between the upper portion of the valve cover 15 and the valve rod 4, a packing seat 19 and a packing 20 are sequentially arranged in the packing gap from bottom to top, the top end of the valve cover 15 is connected with a packing pressing plate 22 through a packing bolt 21, and the packing pressing plate 22 is pressed on the packing 20 through a packing pressing cover 23 to ensure the sealing performance between the valve rod and the valve cover.
The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. The utility model provides a low temperature ball valve, its valve body and valve body cap that includes interconnect, the valve body with install the spheroid between the valve body cap, the spheroid is connected with the valve rod, the spheroid with be equipped with the low reaches sealing ring between the valve body, the spheroid with be equipped with upstream sealing ring, its characterized in that between the valve body cap: a spring is further arranged between the upstream sealing ring and the valve body cap, one end of the downstream sealing ring is provided with an inward concave groove, an elastic ring is embedded into the groove, and the elastic ring is used for enabling the downstream sealing ring to abut against the ball body when the valve is closed.
2. A cryogenic ball valve according to claim 1, wherein: the valve body with still be equipped with the inserted sealing ring between the spheroid, the inserted sealing ring be used for when the valve is closed with the spheroid is tangent.
3. A cryogenic ball valve according to claim 2, wherein: the upstream sealing ring, the downstream sealing ring and the embedded sealing ring are made of polychlorotrifluoroethylene.
4. A cryogenic ball valve according to claim 1, wherein: the valve body is provided with a medium outlet penetrating through the valve body, the valve body cap is provided with a medium inlet penetrating through the valve body cap, a medium channel is arranged in the middle of the ball body, the top of the ball body is provided with a mounting hole, and the valve rod extends into the mounting hole and is connected with the ball body through a screw.
5. A cryogenic ball valve according to claim 1, wherein: the valve body top is connected with the valve gap, the valve rod passes the valve gap and stretches into in the valve body, be equipped with the ladder shaft section on the valve rod, the upper end of ladder shaft section with be equipped with the top thrust pad between the valve cap bottom, the lower extreme of ladder shaft section with be equipped with down the thrust pad between the valve body, the valve rod with still be equipped with valve rod bearing between the valve body.
6. A cryogenic ball valve according to claim 5, wherein: a packing gap is formed between the upper portion of the valve cover and the valve rod, a packing seat and packing are sequentially arranged in the packing gap from bottom to top, the top end of the valve cover is connected with a packing pressing plate through a packing bolt, and the packing pressing plate is pressed on the packing through a packing gland.
7. A cryogenic ball valve according to claim 5, wherein: the thrust pad and the valve rod bearing are made of tin bronze.
8. A cryogenic ball valve according to claim 1, wherein: the spring is a disc spring, and an isolation pad is arranged between the spring and the upstream sealing ring.
9. A cryogenic ball valve according to claim 1, wherein: the other end of the downstream sealing ring comprises a contact surface positioned in the middle and contacted with the valve body and inclined surfaces positioned at two ends of the contact surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222734501.5U CN218564456U (en) | 2022-10-18 | 2022-10-18 | Low-temperature ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222734501.5U CN218564456U (en) | 2022-10-18 | 2022-10-18 | Low-temperature ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218564456U true CN218564456U (en) | 2023-03-03 |
Family
ID=85318176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222734501.5U Active CN218564456U (en) | 2022-10-18 | 2022-10-18 | Low-temperature ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218564456U (en) |
-
2022
- 2022-10-18 CN CN202222734501.5U patent/CN218564456U/en active Active
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