CN221257736U - Ball valve with ball sealing structure - Google Patents
Ball valve with ball sealing structure Download PDFInfo
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- CN221257736U CN221257736U CN202323257430.5U CN202323257430U CN221257736U CN 221257736 U CN221257736 U CN 221257736U CN 202323257430 U CN202323257430 U CN 202323257430U CN 221257736 U CN221257736 U CN 221257736U
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- bottom shaft
- sealing structure
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- 238000007789 sealing Methods 0.000 title claims abstract description 59
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 12
- 239000010959 steel Substances 0.000 claims abstract description 12
- 230000005540 biological transmission Effects 0.000 claims abstract description 6
- 230000006835 compression Effects 0.000 claims description 13
- 238000007906 compression Methods 0.000 claims description 13
- 238000005520 cutting process Methods 0.000 claims description 9
- 238000010276 construction Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 238000012856 packing Methods 0.000 description 9
- 238000013461 design Methods 0.000 description 6
- 229910002804 graphite Inorganic materials 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005504 petroleum refining Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model relates to a ball valve with a ball sealing structure, which comprises: the valve body comprises an inlet valve body and an outlet valve body, and the inlet valve body and the outlet valve body are detachably connected through bolts and mutually enclose a valve cavity; the two valve seat sealing structures are respectively arranged at the inlet and the outlet of the valve cavity; the ball body is arranged between the inlet valve body and the outlet valve body; the first end of the valve rod is in transmission connection with the top of the sphere; the bottom shaft is coaxial with the valve rod, the bottom shaft is connected with the lower end of the ball body, a through hole is formed in the middle of the bottom shaft, and a ball body sealing structure is arranged in the through hole; the ball sealing structure comprises a steel ball, a screw plug and a screw plug pad which are sequentially abutted, and the screw is adjusted to realize flat contact between the steel ball and a lower bottom shaft hole of the ball. Compared with the prior art, in the assembling process of the ball valve designed by the utility model, the adjusting screw ensures that the steel ball is in flat contact with the lower bottom shaft hole of the ball body, so that the gap between the ball body and the bottom shaft is effectively eliminated, and the screw plug pad realize the sealing of the bottom shaft hole.
Description
Technical Field
The utility model relates to the technical field of valves, in particular to a ball valve with a ball sealing structure.
Background
Ball valves have been developed in the 50 s of the 20 th century, and along with the rapid development of science and technology, the continuous improvement of production process and product structure has been rapidly developed into a main valve class in a short 40-year period. In western industrialized countries, the use of ball valves is continuously rising year by year, and in China, ball valves are widely applied to industries such as petroleum refining, long-distance pipeline, chemical industry, papermaking, pharmacy, water conservancy, electric power, municipal administration, steel and the like, and take a significant role in national economy.
Chinese patent 202020954707.7 discloses a ball valve having a valve seat sealing structure, the ball valve including a valve body, a valve seat sealing structure, a ball body, a valve stem, a valve cover, a lower support shaft and a driving part; the valve seat sealing structure is arranged between the valve body and the ball body and comprises a valve seat body, a V-shaped sealing ring, a sealing support ring and an elastic compression ring assembly; the V-shaped sealing ring, the sealing support ring and the elastic compression ring assembly are sequentially sleeved on the valve seat body along the axial direction. However, the above patent does not consider the seal between the bottom shaft and the ball, and in actual use, there is still a defect that the sealing performance is poor.
Disclosure of utility model
The present utility model aims to overcome at least one of the above-mentioned drawbacks of the prior art by providing a ball valve comprising a ball sealing structure.
The aim of the utility model can be achieved by the following technical scheme:
A ball valve comprising a ball seal, comprising:
the valve body comprises an inlet valve body and an outlet valve body, and the inlet valve body and the outlet valve body are detachably connected through bolts and mutually enclose a valve cavity;
The two valve seat sealing structures are respectively arranged at the inlet and the outlet of the valve cavity;
the ball body is arranged between the inlet valve body and the outlet valve body;
the first end of the valve rod is in transmission connection with the top of the sphere;
The bottom shaft is coaxial with the valve rod, the bottom shaft is connected with the lower end of the ball body, a through hole is formed in the middle of the bottom shaft, and a ball body sealing structure is arranged in the through hole; the ball sealing structure comprises a steel ball, a screw, a plug screw and a plug screw pad which are sequentially abutted, the screw is adjusted to realize flat contact between the steel ball and a lower bottom shaft hole of the ball, gaps between the ball and the bottom shaft are effectively eliminated, and the plug screw pad realize sealing of the bottom shaft hole;
further, the ball valve is also provided with a driving part, and the driving part is in transmission connection with the second end of the valve rod.
Further, a third shaft sleeve is arranged between the ball body and the bottom shaft.
Further, the valve rod is of a flying-preventing step structure.
Further, the top of the ball body is provided with a stuffing box sleeved outside the valve rod, a first shaft sleeve arranged between the valve rod and the stuffing box and a second shaft sleeve arranged between the stuffing box and the ball body; the ball body is fixed by the bottom shaft, the stuffing box and the second shaft sleeve.
Further, the top of the valve rod is provided with a valve head, and an upper sealing structure formed by packing and a pressing plate is arranged between the valve head and the packing box.
Further, the valve seat sealing structure comprises a valve seat, a sealing ring, a sealing support ring and an elastic compression ring assembly; the valve seat is provided with a stepped outer edge, the valve body is internally provided with a stepped inner edge, the stepped outer edge and the stepped inner edge enclose an annular cavity, and the sealing ring, the sealing support ring and the elastic compression ring assembly are sequentially sleeved on the valve seat along the axial direction and are positioned in the annular cavity.
Further, a cutting knife is further arranged on the valve seat, and the front end of the cutting knife is propped against the surface of the valve body.
Further, the elastic compression ring assembly comprises a fixed ring seat sleeved on the valve seat, a mounting hole arranged on the fixed ring seat, and an elastic telescopic piece arranged in the mounting hole.
Further, the elastic telescopic piece is a spring.
Further, the ball body is connected with the valve rod through four directions, namely a rectangular groove is formed in the ball body, one end of the valve rod is provided with a rectangular lug matched with the rectangular groove, and the rectangular lug is inserted into the rectangular groove
Compared with the prior art, the utility model has the following advantages:
(1) In the assembling process of the ball valve designed by the utility model, the adjusting screw ensures that the steel ball is in flat contact with the lower bottom shaft hole of the ball body, so that the gap between the ball body and the bottom shaft is effectively eliminated, and the screw plug pad realize the sealing of the bottom shaft hole;
(2) In the utility model, the valve rod adopts the design of the anti-flying step, the center of the sphere adopts the stuffing box to position the center of the sphere, the valve rod is connected with the sphere in a square way, when the sphere is closed, the differential pressure thrust in the pipeline is completely supported by the stuffing box and the bottom shaft, the valve rod only plays the role of valve opening torque, and the valve rod does not bear unidirectional thrust, so that the packing sealing performance is good.
(3) In the utility model, the valve seat adopts a self-cutting design, and is provided with a cutting knife, so that the scale of the spherical surface is effectively removed when the spherical body rotates by 90 degrees. Meanwhile, the sealing ring adopts flexible graphite and has good high temperature resistance and corrosion resistance. The design of the fixed ring seat can effectively control the compression amount of the spring and ensure the pretightening force of the valve seat.
Drawings
FIG. 1 is a schematic illustration of a ball valve incorporating a ball seal in accordance with an embodiment;
FIG. 2 is an enlarged schematic view of FIG. 1 at A;
FIG. 3 is an enlarged schematic view of FIG. 1 at B;
FIG. 4 is an enlarged schematic view of FIG. 1 at C;
The reference numerals in the figures indicate: 1-a sphere; 2-graphite packing; 3-valve seat; 4-a sealing ring; 5-sealing a support ring; 6-fixing the ring seat; 7-elastic telescopic members; 8-a valve rod; 9-pressing plates; 10-packing; 11-stuffing boxes; 12-a first sleeve; 13-thrust pad; 14-a second sleeve; 15-steel balls; 16-screws; 17-a third sleeve; 18-a bottom shaft; 19-a screw plug; 20-valve body; 201-an inlet valve body; 202-an outlet valve body; 21-screw plug pad.
Detailed Description
The utility model will now be described in detail with reference to the drawings and specific examples. The present embodiment is implemented on the premise of the technical scheme of the present utility model, and a detailed implementation manner and a specific operation process are provided, but the protection scope of the present utility model is not limited to the following embodiments.
Examples
1-4, A ball valve having a ball seal structure, comprising:
The valve body 20 comprises an inlet valve body 201 and an outlet valve body 202, wherein the inlet valve body 201 and the outlet valve body 202 are detachably connected through bolts and mutually enclose a valve cavity; the two valve seat sealing structures are respectively arranged at the inlet and the outlet of the valve cavity; a ball 1 provided between the inlet valve body 201 and the outlet valve body 202; the first end of the valve rod 8 is in transmission connection with the top of the sphere 1; the bottom shaft 18 is coaxial with the valve rod 8, the bottom shaft 18 is connected with the lower end of the ball body 1, a through hole is arranged in the middle of the bottom shaft, and a ball body sealing structure is arranged in the through hole; the ball sealing structure comprises a steel ball 15, a screw 16, a screw plug 19 and a screw plug pad 21 which are sequentially abutted. The ball valve is also provided with a driving part which is in transmission connection with the second end of the valve rod 8. A third sleeve 17 is arranged between the ball 1 and the bottom shaft 18.
In the ball sealing structure, the screw 16 is adjusted to realize the flat contact between the steel ball 15 and the lower bottom shaft hole of the ball 1, so that the gap between the ball and the bottom shaft is effectively eliminated, and the screw plug 19 and the screw plug pad 21 realize the sealing of the bottom shaft hole;
Referring to fig. 3 again, the valve rod 8 is of a step structure for preventing flying. The top of the ball body 1 is provided with a stuffing box 11 sleeved outside the valve rod 8, a first shaft sleeve 12 arranged between the valve rod 8 and the stuffing box 11, and a second shaft sleeve 14 arranged between the stuffing box 11 and the ball body 1; the ball 1 is fixed in position by the bottom shaft 18, the stuffing box 11 and the second sleeve 14. The top of the valve rod 8 is provided with a valve head, and an upper sealing structure formed by a packing 10 and a pressing plate 9 is arranged between the valve head and a packing box 11. The ball 1 is connected with the valve rod 8 by four directions, namely a rectangular groove is formed in the ball, one end of the valve rod is provided with a rectangular lug matched with the rectangular groove, and the rectangular lug is inserted into the rectangular groove.
In the upper sealing structure, the valve rod 8 adopts a step design of preventing flying, the center of the ball body 1 adopts a stuffing box 11 to position the center of the ball body with the first shaft sleeve 12 and the second shaft sleeve 14, the valve rod 8 is connected with the ball body 1 in a square way, when the ball body 1 is closed, the differential pressure thrust in a pipeline is completely supported by the stuffing box 11 and the bottom shaft 18, the valve rod 8 only plays a role of valve opening torque, and the valve rod 8 does not bear unidirectional thrust, so that the packing 10 has good sealing performance.
Referring to fig. 4 again, the valve seat sealing structure includes a valve seat 3, a sealing ring 4, a sealing support ring 5, and an elastic compression ring assembly; the valve seat 3 is provided with a stepped outer edge, the valve body 20 is internally provided with a stepped inner edge, the stepped outer edge and the stepped inner edge form an annular cavity, and the sealing ring 4, the sealing support ring 5 and the elastic compression ring component are sequentially sleeved on the valve seat 3 along the axial direction and are positioned in the annular cavity. The valve seat 3 is also provided with a cutting knife, and the front end of the cutting knife is propped against the surface of the valve body 20. The elastic compression ring assembly comprises a fixed ring seat 6 sleeved on the valve seat 3, a mounting hole arranged on the fixed ring seat 6 and an elastic expansion piece 7 arranged in the mounting hole. The elastic expansion piece 7 is a spring. A graphite packing 2 is arranged between the valve seat 3 and the valve body which are abutted against each other so as to play a role in dust prevention.
In the valve seat sealing structure, the valve seat 3 adopts a self-cutting design, and when the sphere 1 rotates by 90 degrees, the scale of the sphere can be effectively removed by the cutting knife. Meanwhile, the sealing ring 4 adopts flexible graphite and has good high temperature resistance and corrosion resistance. The design of the fixed ring seat 6 can effectively control the compression amount of the spring and ensure the pretightening force of the valve seat.
The above description is only a preferred embodiment of the present utility model, and is not intended to limit the utility model in any way, and any person skilled in the art may make modifications or alterations to the disclosed technical content to the equivalent embodiments. However, any simple modification, equivalent variation and variation of the above embodiments according to the technical substance of the present utility model still fall within the protection scope of the technical solution of the present utility model.
Claims (10)
1. A ball valve having a ball seal structure, comprising:
The valve body (20) comprises an inlet valve body (201) and an outlet valve body (202), and the inlet valve body (201) and the outlet valve body (202) are detachably connected through bolts and mutually enclose a valve cavity;
The two valve seat sealing structures are respectively arranged at the inlet and the outlet of the valve cavity;
the ball body (1) is arranged between the inlet valve body (201) and the outlet valve body (202);
the first end of the valve rod (8) is in transmission connection with the top of the sphere (1);
The bottom shaft (18) is coaxial with the valve rod (8), the bottom shaft (18) is connected with the lower end of the ball body (1), a through hole is formed in the middle of the bottom shaft, and a ball body sealing structure is arranged in the through hole; the ball sealing structure comprises a steel ball (15), a screw (16), a screw plug (19) and a screw plug pad (21) which are sequentially abutted, the screw (16) is adjusted to realize flat contact between the steel ball (15) and a lower bottom shaft hole of the ball (1), and the screw plug (19) and the screw plug pad (21) realize sealing of the bottom shaft hole.
2. A ball valve comprising a ball seal according to claim 1, characterized in that the ball valve is further provided with a driving part, which driving part is in driving connection with the second end of the valve stem (8).
3. Ball valve with ball sealing structure according to claim 1, characterized in that a third bushing (17) is arranged between the ball (1) and the bottom shaft (18).
4. A ball valve comprising a ball seal according to claim 1, wherein the valve stem (8) is of a step-like construction.
5. A ball valve with a ball sealing structure according to claim 1, characterized in that the top of the ball (1) is provided with a stuffing box (11) sleeved outside the valve rod (8), a first shaft sleeve (12) arranged between the valve rod (8) and the stuffing box (11), and a second shaft sleeve (14) arranged between the stuffing box (11) and the ball (1); the ball body (1) is fixed by a bottom shaft (18), a stuffing box (11) and a second shaft sleeve (14).
6. Ball valve with ball sealing structure according to claim 1, characterized in that the valve stem (8) is provided with a valve head on top, between which the stuffing box (11) is passed through an upper sealing structure formed by the stuffing (10) and the pressure plate (9).
7. A ball valve comprising a ball seal according to claim 1, wherein the seat seal comprises a seat (3), a seal ring (4), a seal stay (5), and an elastic compression ring assembly; the valve seat (3) is provided with a stepped outer edge, the valve body (20) is internally provided with a stepped inner edge, the stepped outer edge and the stepped inner edge form an annular cavity, and the sealing ring (4), the sealing support ring (5) and the elastic compression ring component are sequentially sleeved on the valve seat (3) along the axial direction and are positioned in the annular cavity.
8. A ball valve with a ball sealing structure according to claim 7, characterized in that the valve seat (3) is further provided with a cutting blade, the front end of which abuts against the surface of the valve body (20).
9. The ball valve with the ball sealing structure according to claim 7, wherein the elastic compression ring assembly comprises a fixed ring seat (6) sleeved on the valve seat (3), a mounting hole arranged on the fixed ring seat (6), and an elastic telescopic piece (7) arranged in the mounting hole.
10. A ball valve comprising a ball seal according to claim 9, characterized in that the elastic expansion element (7) is a spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323257430.5U CN221257736U (en) | 2023-11-30 | 2023-11-30 | Ball valve with ball sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323257430.5U CN221257736U (en) | 2023-11-30 | 2023-11-30 | Ball valve with ball sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221257736U true CN221257736U (en) | 2024-07-02 |
Family
ID=91658106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323257430.5U Active CN221257736U (en) | 2023-11-30 | 2023-11-30 | Ball valve with ball sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221257736U (en) |
-
2023
- 2023-11-30 CN CN202323257430.5U patent/CN221257736U/en active Active
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