CN214662200U - Ball valve with double-sealing valve seat structure - Google Patents
Ball valve with double-sealing valve seat structure Download PDFInfo
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- CN214662200U CN214662200U CN202120848719.6U CN202120848719U CN214662200U CN 214662200 U CN214662200 U CN 214662200U CN 202120848719 U CN202120848719 U CN 202120848719U CN 214662200 U CN214662200 U CN 214662200U
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Abstract
The utility model provides a ball valve with double containment disk seat structure, includes valve body, valve ball, stuffing box, valve rod, the valve ball is located the valve body, stuffing box and valve body fixed connection, the valve rod passes the stuffing box and is connected fixedly with the valve ball, the entrance point and the exit end of valve body and valve ball clearance fit first disk seat respectively, first disk seat one end is equipped with first sealed face, and this first sealed face contacts with the sphere of valve ball, the first disk seat other end extends to and contacts with a spring mount pad, set up the first spring with the valve body contact on the spring mount pad, the one end clearance fit that first disk seat was equipped with first sealed face is in the shaft hole of a second disk seat, second valve seat one end is equipped with the second sealed face, and this second sealed face contacts with the sphere of valve ball, be equipped with the second spring between second valve seat other end and the valve body.
Description
Technical Field
The utility model relates to a ball valve technical field, in particular to ball valve that has double containment disk seat structure.
Background
The ball valve is a valve which uses a ball body with a circular channel as an opening and closing piece and realizes the opening and closing actions by the rotation of the ball body along with a valve rod. The opening and closing part of the ball valve is a sphere with a hole and rotates around an axis vertical to the channel, so that the purpose of opening and closing the channel is achieved, when the valve rod drives the sphere to rotate for 90 degrees, the valve seat is connected with the channel of the sphere, the valve is opened, otherwise, the valve is in a closed state, and the front end and the rear end of the valve seat are sealed with the sphere. The ball valve has the advantages of good sealing performance, quick and light opening and closing, simple structure and the like, so the ball valve is usually used in occasions with higher requirements on sealing performance. Conventional ball valve contains two main types of metal ball valve and soft seal ball valve firmly, however, no matter be hard seal or soft seal all only one valve seat sealing face in the ball valve structure now, and only correspond respectively and be equipped with a spring assembly, in case the valve seat sealing face appears pulling, erosion etc. the leakproofness of ball valve will consequently be damaged, cause the leakage, to some sealed higher positions of requirement, in case the emergence is leaked, will cause whole chemical plant device to park, not only bring economic loss for the mill, can lead to serious potential safety hazard even. Therefore, the valve seat is a key component in the ball valve, and the sealing performance of the valve seat directly influences the normal work of a factory and the service life of the ball valve.
Disclosure of Invention
The utility model aims to provide a ball valve with a double-sealing valve seat structure, which can improve the sealing performance of the ball valve,
the technical scheme of the utility model is that: the utility model provides a ball valve that has double containment disk seat structure, includes valve body, valve ball, stuffing box, valve rod, the valve ball is located the valve body, stuffing box and valve body fixed connection, the valve rod passes the stuffing box and is connected fixedly with the valve ball, the entrance point and the exit end of valve body and valve ball clearance fit respectively a first disk seat, first disk seat one end is equipped with first sealed face, and this first sealed face contacts with the sphere of valve ball, the first disk seat other end extends to and contacts with a spring mount pad, set up the first spring with the valve body contact on the spring mount pad, the one end clearance fit that first disk seat was equipped with first sealed face is in the shaft hole of a second disk seat, second valve seat one end is equipped with the sealed face of second, this sealed face of second contacts with the sphere of valve ball, be equipped with the second spring between the second valve seat other end and the valve body.
Furthermore, the first valve seat is in a step shape, the large-diameter section of the first valve seat is in clearance fit in the shaft hole of the second valve seat, the small-diameter section of the first valve seat is in clearance fit in the spring mounting seat, the end of the small-diameter section is in contact with the spring mounting seat, the front end of the shaft hole of the first valve seat is a first conical hole, the hole wall of the first conical hole is a first sealing surface, and the rear end of the shaft hole of the first valve seat is a round hole.
Furthermore, a first sealing ring is arranged between the small-diameter section of the first valve seat and the valve body.
Furthermore, the second valve seat is in a step shape, a piston cavity is formed between the large-diameter section of the second valve seat and the valve body, an axially extending annular groove is formed in the small-diameter section of the second valve seat, a second spring is arranged in the annular groove, the end of the small-diameter section of the second valve seat and the valve body are free, the front end of the shaft hole of the second valve seat is a second taper hole, the hole wall of the second taper hole is a second sealing surface, and the rear end of the shaft hole of the second valve seat is a round hole in clearance fit with the first valve seat.
Further, the spring mounting seat is provided with a stepped shaft hole, a large-diameter hole of the stepped shaft hole is in clearance fit with the first valve seat, the spring mounting seat is provided with a spring mounting groove extending axially, a first spring is arranged in the spring mounting groove, and a degree of freedom is reserved between the end head of one end of the spring mounting seat, which is provided with the spring mounting groove, and the valve body.
Furthermore, an included angle of 3-4 degrees is formed between the first sealing surface of the first valve seat and the second sealing surface of the second valve seat.
Further, a second sealing ring is arranged between the first valve seat and the second valve seat.
Adopt above-mentioned technical scheme: the valve ball is positioned in the valve body, the stuffing box is fixedly connected with the valve body, the valve rod penetrates through the stuffing box and is fixedly connected with the valve ball, the inlet end and the outlet end of the valve body and the valve ball are respectively in clearance fit with a first valve seat, and the inlet and the outlet of the ball valve are respectively sealed. The valve comprises a valve body, a first valve seat and a spring mounting seat, wherein the valve body is provided with a valve ball, one end of the valve ball is provided with a first sealing surface, the first sealing surface is in contact with the spherical surface of the valve ball all the time when the valve ball rotates, a first sealing barrier is formed, the other end of the valve seat extends to be in contact with the spring mounting seat, the spring mounting seat is provided with a first spring in contact with the valve body, the first valve seat is tightly abutted against the valve ball through the elastic force of the first spring, and therefore the first sealing surface of the first valve seat is tightly attached to the spherical surface of the valve ball, and the sealing effect is enhanced. The valve comprises a valve body, a first valve seat and a second valve seat, wherein the valve body is provided with a valve ball, the valve ball is arranged in the valve body, the first valve seat is provided with a first sealing surface, one end of the first valve seat is in clearance fit in a shaft hole of the second valve seat, one end of the second valve seat is provided with a second sealing surface, the second sealing surface is in contact with the spherical surface of the valve ball all the time when the valve ball rotates, a second sealing barrier is formed, a second spring is arranged between the other end of the second valve seat and the valve body, and the second valve seat is tightly abutted against the spherical surface of the valve ball under the elastic action of the second spring, so that the sealing effect can be enhanced. The inlet and the outlet of the ball valve are respectively provided with a first valve seat and a second valve seat, namely, the inlet and the outlet of the ball valve are respectively provided with two sealing barriers, and a first sealing surface of the first valve seat and a second sealing surface of the second valve seat are mutually independent sealing structures, so that even if one sealing surface is eroded or pulled, the sealing effect can be ensured through the sealing surface of the other valve seat, and the sealing performance of the whole ball valve is improved.
The first valve seat is in a step shape, the large-diameter section of the first valve seat is in clearance fit in the shaft hole of the second valve seat, the first sealing surface of the first valve seat and the second sealing surface of the second valve seat can be in contact with the spherical surface of the valve ball, the sealing effectiveness is guaranteed, the small-diameter section of the first valve seat is in clearance fit in the spring mounting seat, the end of the small-diameter section is in contact with the spring mounting seat, the spring mounting seat can be abutted against the first valve seat under the elastic action of the first spring, the first sealing surface of the first valve seat is tightly attached to the spherical surface of the valve ball, the front end of the shaft hole of the first valve seat is a first taper hole, the hole wall of the first taper hole is a first sealing surface, the first sealing surface is tangent to the spherical surface of the valve ball to form sealing, and the rear end of the shaft hole of the first valve seat is a round hole.
Be equipped with first sealing washer between the path section of first disk seat and the valve body, further guarantee sealed effect.
The second valve seat is in a step shape, a piston cavity is formed between the large-diameter section of the second valve seat and the valve body, an axially extending annular groove is arranged on the small-diameter section of the second valve seat, a second spring is arranged in the annular groove, and the end of the small-diameter section of the second valve seat and the valve body are free, because the inlet and the outlet of the ball valve are both provided with the first valve seat and the second valve seat for sealing, when the sealing of the inlet of the ball valve fails, the pressure in the valve cavity can move from the inlet to the outlet, then the second valve seat is pushed back to the valve ball by the pressure in the piston cavity along with the flowing of the medium in the valve cavity, thereby not only effectively avoiding the leakage caused by the sealing failure of the inlet end, but also fully utilizing the pressure in the valve cavity to enhance the sealing performance of the outlet, the front end of the shaft hole of the second valve seat is a second taper hole, the hole of the second taper surface is a second sealing surface, and the second sealing surface is tangent with the valve ball to form sealing, and the rear end of the shaft hole of the second valve seat is a round hole in clearance fit with the first valve seat.
The spring mounting seat is provided with a stepped shaft hole, a large-diameter hole of the stepped shaft hole is in clearance fit with the first valve seat, the hole shoulder of the stepped shaft hole supports against the first valve seat, the spring mounting seat is provided with a spring mounting groove extending in the axial direction, a first spring is arranged in the spring mounting groove, a degree of freedom is reserved between the end head, provided with the spring mounting groove, of the spring mounting seat and the valve body, and a space for elastic deformation is reserved for the first spring.
And an included angle of 3-4 degrees is formed between the first sealing surface of the first valve seat and the second sealing surface of the second valve seat, so that the two sealing surfaces can be sequentially contacted with the spherical surface of the valve ball, and the sealing performance is ensured.
And a second sealing ring is arranged between the first valve seat and the second valve seat, so that the sealing property between the first valve seat and the second valve seat is ensured, and the sealing performance of the whole ball valve is improved.
The invention is further described with reference to the drawings and the specific embodiments.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure at A in FIG. 1;
FIG. 3 is a schematic view of a first valve seat;
FIG. 4 is a schematic view of a second valve seat;
fig. 5 is a schematic structural view of the spring mount.
Detailed Description
Referring to fig. 1 to 5, the ball valve with a double-sealing valve seat structure comprises a valve body 1, a valve ball 2, a stuffing box 3 and a valve rod 4, wherein the valve ball 2 is located in the valve body 1, the stuffing box 3 is fixedly connected with the valve body 1 through bolts, and the valve rod 4 penetrates through the stuffing box 3 and is fixedly connected with the valve ball 2. The inlet end and the outlet end of the valve body 1 and the valve ball 2 are respectively in clearance fit with a first valve seat 5 to respectively seal the inlet and the outlet of the ball valve. The first valve seat 5 one end is equipped with first sealed face 6, and this first sealed face 6 contacts with the sphere of valve ball 2, and first sealed face 6 contacts with the sphere of valve ball 2 all the time when valve ball 2 rotates, forms first sealed barrier. The other end of the first valve seat 5 extends to be in contact with a spring mounting seat 7, a first spring 8 in contact with the valve body 1 is arranged on the spring mounting seat 7, the first valve seat 5 is tightly abutted against the valve ball 2 under the elastic force action of the first spring 8, and therefore the first sealing surface 6 of the first valve seat 5 is tightly attached to the spherical surface of the valve ball 2, and the sealing effect is enhanced. One end of the first valve seat 5, which is provided with the first sealing surface 6, is in clearance fit in a shaft hole of a second valve seat 9, one end of the second valve seat 9 is provided with a second sealing surface 10, the second sealing surface 10 is in contact with the spherical surface of the valve ball 2, and the second sealing surface 10 is also in contact with the spherical surface of the valve ball 2 all the time when the valve ball 2 rotates, so that a second sealing barrier is formed. And a second spring 11 is arranged between the other end of the second valve seat 9 and the valve body 1, and the second valve seat 9 is tightly propped against the spherical surface of the valve ball 2 under the elastic action of the second spring 11, so that the sealing effect can be enhanced. An included angle of 3-4 degrees is formed between the first sealing surface 6 of the first valve seat 5 and the second sealing surface 10 of the second valve seat 9, so that the two sealing surfaces can be sequentially contacted with the spherical surface of the valve ball 2, and the sealing performance is ensured. The shaft hole of the first valve seat 5, the shaft hole of the second valve seat 9 and the shaft hole of the spring mounting seat 7 are communicated with the valve cavity.
The front end of the shaft hole of the first valve seat 5 of the embodiment is a first taper hole 5-1, the hole wall of the first taper hole 5-1 is a first sealing surface 6, so that the first sealing surface 6 forms a seal by being tangent to the spherical surface of the valve ball 2, and the rear end of the shaft hole of the first valve seat is a round hole which is communicated with the fluid passage of the valve ball 2. The front end of the shaft hole of the second valve seat 9 is a second taper hole 9-2, the hole wall of the second taper hole 9-2 is a second sealing surface 10, so that the second sealing surface 10 forms a seal by being tangent to the spherical surface of the valve ball 2, the rear end of the shaft hole of the second valve seat 9 is a round hole in clearance fit with the first valve seat 5, the first valve seat 5 is in a step shape, the large-diameter section of the first valve seat 5 is in clearance fit with the rear end of the shaft hole of the second valve seat 9, so that the first sealing surface 6 of the first valve seat 5 and the second sealing surface 10 of the second valve seat 9 can be effectively contacted with the spherical surface of the valve ball 2, the effectiveness of sealing is ensured, and the internal structure of the ball valve is more compact, and be equipped with second sealing washer 13 between first valve seat 5 and the second valve seat 9, guarantee the leakproofness between first valve seat 5 and the second valve seat 9 to improve the sealing performance of whole ball valve. The small diameter section of the first valve seat 5 is in clearance fit in the spring mounting seat 7, and the end of the small diameter section is in contact with the spring mounting seat 7, so that the spring mounting seat 7 can be tightly propped against the first valve seat 5 under the elastic action of the first spring 8, and the first sealing surface 6 of the first valve seat 5 is tightly attached to the spherical surface of the valve ball 2. The spring installation seat 7 is provided with a stepped shaft hole, the small-diameter section of the first valve seat 5 is in clearance fit in the large-diameter hole 7-1 of the stepped shaft hole and abuts against the first valve seat 5 through a hole shoulder of the stepped shaft hole, the spring installation seat 7 is provided with an axially extending spring installation groove 7-2, a first spring 8 is arranged in the spring installation groove 7-2, a degree of freedom is reserved between the end head, provided with the spring installation groove 7-2, of the spring installation seat 7 and the valve body 1, an elastic deformation space is reserved for the first spring 8, the spring installation seat 7 presses the first valve seat 5 to the spherical surface of the valve ball 2 through the first spring 8, and the first sealing surface 6 of the first valve seat 5 is kept in a state of being tightly attached to the spherical surface of the valve ball 2. Be equipped with first sealing washer 12 between the minor diameter section of first disk seat 5 and the valve body 1, strengthen the leakproofness between valve body 1, spring mount seat 7 and 5 three of first disk seat through first sealing washer 12 to further guarantee the sealed effect of whole ball valve.
The second valve seat 9 of the embodiment is in a step shape, a piston cavity 14 is formed between the large-diameter section of the second valve seat 9 and the valve body 1, an axially extending annular groove 9-1 is arranged on the small-diameter section of the second valve seat 9, a second spring 11 is arranged in the annular groove 9-1, and the end of the small-diameter section of the second valve seat 9 and the valve body 1 are provided with freedom degrees, because the inlet and the outlet of the ball valve are provided with the first valve seat 5 and the second valve seat 9 for sealing, when the sealing of the inlet of the ball valve fails, the pressure in the valve cavity can move from the inlet to the outlet, then, the pressure in the piston cavity 14 reversely pushes the second valve seat 9 to the ball valve 2 along with the flow of the medium in the valve cavity, so that leakage of the ball valve caused by sealing failure of the inlet end can be effectively avoided, the sealing performance of the outlet end can be enhanced by fully utilizing the pressure in the valve cavity when the sealing failure of the inlet section occurs, and the safe use of the ball valve is ensured.
When the first valve seat 5 and the second valve seat 9 of the ball valve are assembled, the first spring 8 is firstly installed in the spring installation groove 7-2 of the spring installation seat 7, then the spring installation seat 7 is integrally installed in the valve body 1, then the second sealing ring 13 is installed in the valve body 1, then the first sealing ring 12 is assembled on the first valve seat 5, then the first valve seat 5 is installed in the valve body 1 and is in contact with the spherical surface of the valve ball 2, then the second spring 11 is installed in the annular groove 9-1 of the second valve seat 9, and finally the second valve seat 9 is integrally assembled in the valve body 1 and is in contact with the spherical surface of the valve ball 2.
This ball valve all is equipped with first disk seat 5 and second valve seat 9 at the entrance point and the exit end of valve ball 2 and seals, inlet and the export of ball valve all are provided with twice sealing barrier formation double seal promptly, and first disk seat 5 makes first sealed face 6 hug closely the sphere of valve ball 2 through first spring 8, second valve seat 9 makes second sealed face 10 hug closely the sphere of valve ball 2 through second spring 11, consequently, twice sealing barrier is mutually independent seal structure, mutually noninterfere, under the normal condition, first sealed face 6, second sealed face 10 is all hugged closely on the sphere of valve ball 2, can greatly improve sealing performance, even erosion or strain appear in one of them sealed face, can also guarantee sealed effect through the sealed face of another disk seat, prevent that the ball valve from taking place to leak, thereby guarantee the sealing reliability of ball valve, the life of extension ball valve. And, a piston cavity 14 is formed between the second valve seat 9 and the valve body 1 of the ball valve, when two seals at the inlet of the ball valve fail, the pressure in the valve cavity enters the piston cavity 14 between the second valve seat 9 at the outlet end and the valve body 1, and the second valve seat 9 is pushed back to the ball valve 2, so that the second sealing surface is still tightly attached to the spherical surface of the ball valve 2, thereby effectively avoiding the leakage of the ball valve caused by the failure of the inlet end seal, and also fully utilizing the pressure in the valve cavity to enhance the sealing performance of the outlet end when the inlet end seal fails, ensuring the safe use of the ball valve, and improving the sealing reliability of the ball valve.
Claims (7)
1. The utility model provides a ball valve with double containment disk seat structure, includes valve body (1), valve ball (2), stuffing box (3), valve rod (4), valve ball (2) are located valve body (1), stuffing box (3) and valve body (1) fixed connection, valve rod (4) pass stuffing box (3) and are connected fixedly its characterized in that with valve ball (2): the inlet end and the outlet end of the valve body (1) and the valve ball (2) are respectively in clearance fit with a first valve seat (5), one end of the first valve seat (5) is provided with a first sealing surface (6), the first sealing surface (6) is in spherical contact with the valve ball (2), the other end of the first valve seat (5) extends to be in contact with a spring mounting seat (7), a first spring (8) in contact with the valve body (1) is arranged on the spring mounting seat (7), one end of the first valve seat (5) provided with the first sealing surface (6) is in clearance fit with a shaft hole of a second valve seat (9), one end of the second valve seat (9) is provided with a second sealing surface (10), the second sealing surface (10) is in spherical contact with the valve ball (2), and a second spring (11) is arranged between the other end of the second valve seat (9) and the valve body (1).
2. A ball valve having a dual sealing seat structure in accordance with claim 1, wherein: the first valve seat (5) is in a step shape, a large-diameter section of the first valve seat (5) is in clearance fit in a shaft hole of the second valve seat (9), a small-diameter section of the first valve seat (5) is in clearance fit in the spring mounting seat (7), the end of the small-diameter section is in contact with the spring mounting seat (7), the front end of the shaft hole of the first valve seat (5) is a first conical hole (5-1), the hole wall of the first conical hole (5-1) is a first sealing surface (6), and the rear end of the shaft hole of the first valve seat (5) is a round hole.
3. The ball valve with dual sealing valve seat structure according to claim 2, wherein: a first sealing ring (12) is arranged between the small-diameter section of the first valve seat (5) and the valve body (1).
4. A ball valve having a dual sealing seat structure in accordance with claim 1, wherein: the valve is characterized in that the second valve seat (9) is in a step shape, a piston cavity (14) is formed between a large-diameter section of the second valve seat (9) and the valve body (1), an axially extending annular groove (9-1) is formed in the small-diameter section of the second valve seat (9), a second spring (11) is arranged in the annular groove (9-1), the end of the small-diameter section of the second valve seat (9) is free from the valve body (1), the front end of a shaft hole of the second valve seat (9) is a second taper hole (9-2), the hole wall of the second taper hole (9-2) is a second sealing surface (10), and the rear end of the shaft hole of the second valve seat (9) is a round hole in clearance fit with the first valve seat (5).
5. A ball valve having a dual sealing seat structure in accordance with claim 1, wherein: the spring mounting seat (7) is provided with a stepped shaft hole, a large-diameter hole (7-1) of the stepped shaft hole is in clearance fit with the first valve seat (5), the spring mounting seat (7) is provided with a spring mounting groove (7-2) extending axially, a first spring (8) is arranged in the spring mounting groove (7-2), and the end of one end, provided with the spring mounting groove (7-2), of the spring mounting seat (7) is provided with a degree of freedom between the end and the valve body (1).
6. A ball valve having a dual sealing seat structure in accordance with claim 1, wherein: an included angle of 3-4 degrees is formed between the first sealing surface (6) of the first valve seat (5) and the second sealing surface (10) of the second valve seat (9).
7. A ball valve having a dual sealing seat structure in accordance with claim 1, wherein: and a second sealing ring (13) is arranged between the first valve seat (5) and the second valve seat (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120848719.6U CN214662200U (en) | 2021-04-23 | 2021-04-23 | Ball valve with double-sealing valve seat structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120848719.6U CN214662200U (en) | 2021-04-23 | 2021-04-23 | Ball valve with double-sealing valve seat structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214662200U true CN214662200U (en) | 2021-11-09 |
Family
ID=78471109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120848719.6U Active CN214662200U (en) | 2021-04-23 | 2021-04-23 | Ball valve with double-sealing valve seat structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214662200U (en) |
-
2021
- 2021-04-23 CN CN202120848719.6U patent/CN214662200U/en active Active
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