CN210440607U - All-welded steel ball valve - Google Patents
All-welded steel ball valve Download PDFInfo
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- CN210440607U CN210440607U CN201920722816.3U CN201920722816U CN210440607U CN 210440607 U CN210440607 U CN 210440607U CN 201920722816 U CN201920722816 U CN 201920722816U CN 210440607 U CN210440607 U CN 210440607U
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- valve
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- gasket
- valve body
- sealing
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Abstract
The utility model provides an all-welded steel ball valve, the import and the export of valve body all seal fixedly connected with tubulose and connect, two tubulose connect and all be equipped with the ring channel on the one end inner wall of globular case towards, sliding seal has the disk seat in the ring channel, be equipped with annular elastic component between the diapire of ring channel and the disk seat, be fixed with annular first gasket on the diapire of ring channel, the disk seat is equipped with annular second gasket towards elasticity with one side of elastic component, elastic component and first gasket and the contact of second gasket constitute the sealed of disk seat and tubulose joint, the elastic component is that an holistic structure makes the pretightning force of disk seat can evenly distributed, the pretightning force distribution between the sealed face is also very even, rubber O type sealing washer has been cancelled, change to the flat gasket, the application scope of valve has.
Description
Technical Field
The utility model relates to the technical field of valves, especially an all-welded steel valve.
Background
The products in the market at present are all cylindrical spiral springs (small-caliber disc springs are also adopted). A seating hole is drilled in the valve cover 9, and a spring is installed in the seating hole. In the production practice, the drilling depth is not easy to keep consistent, and the drilled hole bottom is conical, so that the spring is easy to deflect after being placed. Therefore, the heights of the springs are inconsistent after the springs are installed (the number of the springs is different from dozens to hundreds of springs according to different diameters and pressures of the valves), the stress of the springs is uneven, and the stress of a sealing surface is uneven. In order to ensure the initial sealing effect of the valve, a method for improving the pretightening force is often adopted for solving the problem, and the pretightening force is improved, so that the opening torque of the valve is improved, the valve action is inflexible, the abrasion of a sealing surface is increased, and the service life of the valve is greatly influenced. In addition, the sealing between the valve seat and the tubular joint adopts a rubber O-shaped ring, so the application range is only-15 ℃ to 200 ℃, and the application range of the valve is limited.
SUMMERY OF THE UTILITY MODEL
To above-mentioned condition, for overcoming prior art's defect, the utility model aims at providing an even stability of pretightning force between disk seat and the case improves leakproofness between case and the disk seat, and is high temperature resistant, and temperature application scope is wideer.
The technical scheme is that the all-welded steel valve comprises a valve body, wherein an inlet and an outlet are arranged on the valve body, tubular joints are fixedly connected with the inlet and the outlet of the valve body in a sealing manner, the axes of the two tubular joints are overlapped, a spherical valve core positioned between the two tubular joints is arranged in the valve body, annular grooves are respectively arranged on the inner walls of one ends of the two tubular joints facing the spherical valve core, a valve seat is connected with the annular grooves in a sliding and sealing manner, an annular elastic piece is arranged between the bottom wall of the annular groove and the valve seat, an annular first gasket is fixed on the bottom wall of the annular groove, an annular second gasket is arranged on one side of the elastic piece facing the valve seat in an elastic manner, the elastic piece is in contact with the first gasket and the second gasket to form the seal of the valve seat and the tubular joints, a sealing gasket in contact with the spherical valve core is fixed on the valve seat, the lower part of the valve core is rotationally connected with a lower valve shaft which is coaxial with the upper valve shaft, the lower valve shaft is fixedly and hermetically connected with the valve body, the upper valve shaft is rotationally and hermetically connected with the valve body, and the upper valve shaft axially extends out of the shell and the extending end of the upper valve shaft is connected with a driving device.
Preferably, the lower shaft hole is arranged at the lower part of the valve body, the lower valve shaft extends into the lower shaft hole, and the lower part of the valve body is detachably provided with a bottom cover for sealing the lower shaft hole.
Preferably, the lower part of the valve core is provided with a rotating hole, a shaft sleeve is fixedly connected in the rotating hole, and the lower valve shaft is inserted into the shaft sleeve and is rotationally connected with the shaft sleeve.
Preferably, the valve body is provided with an extension part, the upper valve shaft penetrates through the extension part, the extension part is provided with an upper shaft hole, the upper valve shaft penetrates through the upper shaft hole, a sealing sleeve is hermetically sleeved on the upper valve shaft and is in contact sealing with the wall of the upper shaft hole, the upper valve shaft penetrates through the extension part, a gland is inserted into the upper part of the inner wall of the upper shaft hole, and the upper valve shaft penetrates through the gland.
Preferably, the top of the extension is provided with a flange structure, and the driving device is fixed on the extension through the flange structure.
Preferably, the cross-section of the elastic member is O-shaped.
Preferably, the gasket is an asbestos gasket or a graphite composite gasket.
The utility model has the advantages that: the elastic piece is of an integral structure, so that the pretightening force of the valve seat can be uniformly distributed, the pretightening force among the sealing surfaces is also uniformly distributed, and the defects of non-uniform stress and large pretightening force of the sealing surfaces caused by the adoption of a cylindrical spiral spring in the traditional design are avoided; the rubber O-shaped sealing ring is eliminated, the flat gasket is used instead, different materials such as asbestos gasket, graphite composite gasket and the like can be selected for the gasket according to different medium conditions, the application range of the valve is-40 ℃ to 450 ℃, the application range of the valve is greatly improved, and the valve is particularly suitable for a welded ball valve with metal hard seal.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an enlarged schematic view of a point a in fig. 1 according to the present invention.
Fig. 3 is a schematic view of the elastic member of the present invention.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.
As shown in fig. 1 to 3, an all-welded steel valve comprises a valve body 1, wherein an inlet and an outlet are arranged on the valve body 1, the inlet and the outlet of the valve body 1 are fixedly connected with a tubular joint 2 in a sealing manner, the axes of the two tubular joints 2 are overlapped, and a spherical valve core 3 positioned between the two tubular joints 2 is arranged in the valve body 1, and the all-welded steel valve is characterized in that an annular groove 4 is arranged on the inner wall of one end of each of the two tubular joints 2 facing the spherical valve core 3, a valve seat 5 is connected with the annular groove 4 in a sliding and sealing manner, an annular elastic member 6 is arranged between the bottom wall of the annular groove 4 and the valve seat 5, an annular first gasket 7 is fixed on the bottom wall of the annular groove 4, an annular second gasket 8 is arranged on one side of the elastic member 6 facing the valve seat 5 in an elastic manner, the elastic member 6 is in contact with the first gasket 7 and the second gasket 8 to form a seal between the valve seat, the upper part of the spherical valve core 3 is fixedly connected with an upper valve shaft 10 which is vertical to the axis of the tubular joint 2, the lower part of the valve core is rotatably connected with a lower valve shaft 11 which is coaxial with the upper valve shaft 10, the lower valve shaft 11 is fixedly and hermetically connected with the valve body 1, the upper valve shaft 10 is rotatably and hermetically connected with the valve body 1, and the upper valve shaft 10 extends upwards out of the shell and the extending end of the upper valve shaft is connected with a driving device. One side of the elastic element 6 is in contact seal with the first gasket 7, the other side of the elastic element 6 is in contact with the second gasket 8, the elastic element 6 forms seal with the first gasket 7 and the second gasket 8, and after passing through the tubular joint 2 and the valve seat 5, fluid in the valve is blocked by the seal formed by the elastic element 6, the first gasket 7 and the second gasket 8, so that sealing rings between the valve seat 5 and the pipe joint are not needed. The valve seat 5 is provided with a through hole for communicating the tubular joint 2 and the spherical valve core, and the through hole is coaxial with the tubular structure. The two tubular joints 2 are fixedly connected with the valve body 1 in a sealing way in a welding way.
The lower part of the valve body 1 is provided with a lower shaft hole, the lower valve shaft 11 extends into the lower shaft hole, and the lower part of the valve body 1 is detachably provided with a bottom cover 12 for sealing the lower shaft hole. The valve cover is arranged to facilitate installation of the spherical valve core 3, the spherical valve core 3 is placed in the valve body 1 firstly, then the lower valve shaft 11 is installed, and the upper valve cover is installed at last, so that the installation and the disassembly of the spherical valve core 3 are facilitated.
The lower part of the spherical valve core 3 is provided with a rotating hole, a shaft sleeve 13 is fixedly connected in the rotating hole, and the lower valve shaft 11 is inserted into the shaft sleeve 13 and is rotationally connected with the shaft sleeve 13. The added shaft sleeve 13 can prevent the valve core from being abraded, and simultaneously, the processing difficulty of the valve core is reduced.
The valve body 1 is provided with an extension portion 14, the upper valve shaft 10 penetrates through the extension portion 14, an upper shaft hole is formed in the extension portion 14, the upper valve shaft 10 penetrates through the upper shaft hole, a sealing sleeve 15 is arranged on the upper valve shaft 10, the sealing sleeve 15 is in contact sealing with the wall of the upper shaft hole, the upper valve shaft 10 penetrates through the extension portion 14, a gland 16 is inserted into the upper portion of the inner wall of the upper shaft hole, and the upper valve shaft 10 penetrates through the gland 16. The extension 14 is provided to facilitate sealing of the upper valve shaft 10, as well as mounting and corresponding operation of the drive device.
The top of the extension part 14 is provided with a flange structure 17, and the driving device is fixed on the extension part 14 through the flange structure 17.
The section of the elastic piece 6 is O-shaped.
The gasket is an asbestos gasket or a graphite composite gasket. Asbestos gasket or graphite composite gasket can be corrosion-resistant, resistant high low temperature to can form sealedly with elastic component 6, have fine effect.
The utility model has the advantages that: the elastic piece is of an integral structure, so that the pretightening force of the valve seat can be uniformly distributed, the pretightening force among the sealing surfaces is also uniformly distributed, and the defects of non-uniform stress and large pretightening force of the sealing surfaces caused by the adoption of a cylindrical spiral spring in the traditional design are avoided; the rubber O-shaped sealing ring is eliminated, the flat gasket is used instead, different materials such as asbestos gasket, graphite composite gasket and the like can be selected for the gasket according to different medium conditions, the application range of the valve is-40 ℃ to 450 ℃, the application range of the valve is greatly improved, and the valve is particularly suitable for a welded ball valve with metal hard seal.
The above-mentioned embodiments are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design concept of the present invention should be included in the protection scope defined by the claims of the present invention.
Claims (7)
1. The utility model provides a full-welded steel valve, includes valve body (1), has import and export on valve body (1), and the import and the export of valve body (1) all seal fixedly connected with tubulose joint (2), and the axis coincidence of two tubulose joints (2), be equipped with in valve body (1) and lie in globular case (3) between two tubulose joints (2), its characterized in that, two tubulose joint (2) all are equipped with ring channel (4) on the one end inner wall towards globular case (3), and sliding seal has disk seat (5) in ring channel (4), is equipped with annular elastic component (6) between the diapire of ring channel (4) and disk seat (5), be fixed with annular first gasket (7) on the diapire of ring channel (4), disk seat (5) are equipped with annular second gasket (8) towards elasticity with one side of elastic component (6), and elastic component (6) and first gasket (7) and second gasket (8) contact constitute disk seat (5) and tubulose joint (5) and connect (2) The sealing device is characterized in that a sealing gasket (9) in contact sealing with the spherical valve core (3) is fixed on the valve seat (5), the upper portion of the spherical valve core (3) is fixedly connected with an upper valve shaft (10) perpendicular to the axis of the tubular joint (2), the lower portion of the valve core is rotatably connected with a lower valve shaft (11) coaxial with the upper valve shaft (10), the lower valve shaft (11) is fixedly and hermetically connected with the valve body (1), the upper valve shaft (10) is rotatably and hermetically connected with the valve body (1), and the upper valve shaft (10) upwards extends out of the shell and extends out of the end to be connected with the driving device.
2. An all-welded steel valve according to claim 1, wherein the lower part of the valve body (1) is provided with a lower shaft hole, the lower valve shaft (11) extends into the lower shaft hole, and a bottom cover (12) for sealing the lower shaft hole is detachably arranged on the lower part of the valve body (1).
3. An all-welded steel valve according to claim 1 or 2, wherein a rotary hole is formed in the lower portion of the spherical valve core (3), a shaft sleeve (13) is fixedly connected in the rotary hole, and the lower valve shaft (11) is inserted into the shaft sleeve (13) and is rotatably connected with the shaft sleeve (13).
4. The all-welded steel valve according to claim 1, wherein the valve body (1) is provided with an extension part (14), the upper valve shaft (10) penetrates through the extension part (14), an upper shaft hole is formed in the extension part (14), the upper valve shaft (10) penetrates through the upper shaft hole, a sealing sleeve (15) is arranged on the sealing sleeve (15) on the upper valve shaft (10), the sealing sleeve (15) is in contact sealing with the wall of the upper shaft hole, a gland (16) is inserted into the upper part of the inner wall of the upper shaft hole, and the upper valve shaft (10) penetrates through the gland (16).
5. All welded steel valve according to claim 4, wherein the extension (14) is provided with a flange structure (17) at the top, and the drive means is fixed to the extension (14) by means of the flange structure (17).
6. An all-welded steel valve according to claim 1, wherein the cross-section of the elastic member (6) is O-shaped.
7. An all-welded steel valve according to claim 1 or 6, wherein the gasket is an asbestos gasket or a graphite composite gasket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920722816.3U CN210440607U (en) | 2019-05-20 | 2019-05-20 | All-welded steel ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920722816.3U CN210440607U (en) | 2019-05-20 | 2019-05-20 | All-welded steel ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210440607U true CN210440607U (en) | 2020-05-01 |
Family
ID=70401985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920722816.3U Active CN210440607U (en) | 2019-05-20 | 2019-05-20 | All-welded steel ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210440607U (en) |
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2019
- 2019-05-20 CN CN201920722816.3U patent/CN210440607U/en active Active
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