CN210240757U - High-temperature high-pressure self-sealing floating ball valve - Google Patents
High-temperature high-pressure self-sealing floating ball valve Download PDFInfo
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- CN210240757U CN210240757U CN201921008445.9U CN201921008445U CN210240757U CN 210240757 U CN210240757 U CN 210240757U CN 201921008445 U CN201921008445 U CN 201921008445U CN 210240757 U CN210240757 U CN 210240757U
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Abstract
The utility model discloses a high temperature high pressure self sealss ball valve that floats, including valve body and integral type valve gap, the upper end surface through connection of valve body has the valve rod to connect the pole, the outside that the valve rod connects the pole from supreme cover in proper order has connection pad and support down, the lower extreme fixedly connected with valve rod that the valve rod connects the pole, from having set gradually third belleville spring group, first packing pad, first V type packing group and first inclination sealing washer down between the outside of valve rod and the inboard of valve body, the lower extreme fixedly connected with spheroid of valve rod, integral type valve gap gomphosis in one side of valve body, one side surface of integral type valve gap runs through and is provided with full tooth double-screw bolt, the outside threaded connection of full tooth double-screw. The utility model relates to a high temperature high pressure self sealss ball valve that floats has self sealss structure, and is sealed effectual, can effectually avoid sealed department to place the shortcoming that metal winding gasket or pure graphite gasket brought.
Description
Technical Field
The utility model relates to a seal structure field, in particular to high temperature high pressure self sealss ball valve that floats.
Background
The high-temperature high-pressure self-sealing floating ball valve is generally used for the bottoms of a main steam pipeline and a unit of a high-temperature high-pressure system of thermal power generation, when the unit is just started, condensate water can be generated in the pipeline and the unit along with gradual rise of temperature, at the moment, the condensate water must be removed through the high-temperature high-pressure self-sealing floating ball valve, so that the temperature can be continuously raised, the energy consumption of a boiler is reduced, and after the temperature reaches a specified temperature, the high-temperature high-pressure self-sealing floating ball valve is closed, the unit normally operates, so the high-temperature high-pressure self-sealing floating ball valve is basically in a closed state for a long time, the sealing effect of the valve is required to be good, and.
Generally, when ball valve manufacturers design such ball valves, bolt and nut pressing packing pressing plates are adopted in valve rod sealing parts to provide sealing force for packing, so that valve rod sealing is realized, a spring washer or a disc spring group is placed under a nut for better sealing to provide certain high-temperature compensation pretightening force to prevent the situation that the bolt stretching pretightening force disappears at high temperature, however, after the high-temperature bolt is stretched, the pretightening force provided for the packing sealing cannot be compensated far by the high-temperature compensation pretightening force provided by the spring washer or the disc spring group; the valve body is connected with the valve cover through bolts and nuts, the middle channel seal is a metal wound gasket or a pure graphite gasket, the gasket has no problem at normal temperature, and once the valve body is in a high-temperature and high-pressure state, the middle channel seal effect is greatly reduced due to the characteristics of graphite; the seal between the main seal valve seat and the valve cover is generally sealed by a graphite gasket or sealed by interference fit, the graphite can expand under a high-temperature state to lead the valve seat to tightly wrap the ball body, so that the valve can not be blocked, the graphite can blow away the valve under a high-pressure state, the seal cannot be realized, the seal can be realized by the interference fit under a normal-temperature state, once the valve reaches the high-temperature state, the valve is not flexible or blocked due to different thermal expansion coefficients, and the seal can also fail, therefore, the high-temperature high-pressure self-sealing floating ball valve is provided.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides a high temperature high pressure self sealss ball valve that floats can effectively solve the problem in the background art.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a high-temperature high-pressure self-sealing floating ball valve comprises a valve body and an integrated valve cover, wherein a valve rod connecting rod is connected to the outer surface of the upper end of the valve body in a penetrating manner, a connecting disc and a support are sequentially sleeved on the outer side of the valve rod connecting rod from bottom to top, a valve rod is fixedly connected to the lower end of the valve rod connecting rod, a third disc spring group, a first packing pad, a first V-shaped packing group and a first inclination sealing ring are sequentially arranged between the outer side of the valve rod and the inner side of the valve body from bottom to top, a ball body is fixedly connected to the lower end of the valve rod, the integrated valve cover is embedded into one side of the valve body, a full-tooth stud is arranged on the outer surface of one side of the integrated valve cover in a penetrating manner, a nut is in threaded connection with the outer side of, the integral valve cover is embedded in the outer surface of the inner side of the valve body, and a second disc spring group, a second packing pad, a second V-shaped packing group and a second inclination sealing ring are sequentially arranged along the horizontal direction.
Preferably, a thrust ring and a thrust ring gland are arranged between the upper end of the valve rod connecting rod and the inner side of the support, a set screw penetrates through the outer surface of the upper end of the support, and the lower end of the set screw is in threaded connection with the inner side of the thrust ring gland.
Preferably, the edge of support and connection pad is run through and is provided with the second double-screw bolt, the upper and lower both ends threaded connection of second double-screw bolt has the reinforcement nut, it has plain washer and spring washer to fill between reinforcement nut and the second double-screw bolt, pass through second double-screw bolt fixed connection between support and the connection pad.
Preferably, a supporting rod is connected between the outer surface of the lower end of the connecting disc, which is close to the edge, and the outer surface of the upper end of the valve body, the supporting rod is fixedly connected with the valve body, a first stud penetrates through the inner side of the supporting rod, and the lower end of the first stud is in threaded connection with the inner side of the valve body.
Preferably, a pre-tightening nut is arranged between the valve rod connecting rod and the valve body and sleeved outside the valve rod connecting rod, a flat key is arranged between the valve rod connecting rod and the pre-tightening nut, and the flat key is movably embedded inside the valve rod connecting rod.
Preferably, a pre-tightening valve seat is filled on one side, opposite to the integrated valve cover, of the ball body, a disc spring is arranged on one side of the pre-tightening valve seat, and a cylindrical circulation hole coaxial with the ball body penetrates through the valve body and the integrated valve cover.
Compared with the prior art, the utility model discloses following beneficial effect has: the high-temperature high-pressure self-sealing floating ball valve has a self-sealing structure, the third disc spring group is arranged at the sealing part of the valve rod and the valve body, the valve rod is tensioned and self-locked by the aid of the pre-tightening nut, and the pre-tightening force of the third disc spring group is transmitted to the first V-shaped packing group and the first slope sealing ring through the first packing gasket, so that sealing is achieved; under the condition of low pressure, the sealing force of the first V-shaped packing group and the first slope sealing ring is provided by the third belleville spring group; under the condition of high pressure, the sealing force of the first V-shaped packing group and the first slope sealing ring is provided by the third belleville spring group and the medium acting force, so that the effect of self-sealing of the pressure is achieved; under the condition of high temperature, the third disc spring group and the medium acting force jointly provide sealing force, so that the first V-shaped packing group and the first slope sealing ring can achieve complete sealing as usual; simultaneously the valve body adopts the second belleville spring group with the sealing position of integral type valve gap, the second packing pad, second V type packing group and second inclination sealing washer, structure and sealed principle with valve rod and valve body sealing position are similar, consequently, can reach better sealed effect, simultaneously because the elastic action of first belleville spring group, can compensate the pretightning force that partly full tooth double-screw bolt elongates the loss, can effectually avoid sealed department to place the shortcoming that metal winding gasket or pure graphite gasket brought, possess better self sealss function.
Drawings
FIG. 1 is a front cross-sectional view of a high-temperature high-pressure self-sealing floating ball valve of the present invention;
FIG. 2 is a partial view of a high-temperature high-pressure self-sealing floating ball valve according to the present invention;
fig. 3 is an enlarged view of a portion a in fig. 2 of the high-temperature high-pressure self-sealing floating ball valve according to the present invention;
fig. 4 is an enlarged view of B in fig. 2 of the high temperature and high pressure self-sealing floating ball valve of the present invention;
fig. 5 is the utility model relates to a local view two of high temperature high pressure self sealss ball valve that floats.
In the figure: 1. a full-tooth stud; 2. a nut; 3. a first disc spring set; 4. an integral valve cover; 5. a second disc spring set; 6. a sphere; 7. a valve body; 8. pre-tightening the valve seat; 9. a disc spring; 10. a valve stem; 11. a third disc spring set; 12. a first packing pad; 13. a first group of V-shaped packing; 14. a first slope seal ring; 15. pre-tightening the nut; 16. a flat bond; 17. a valve rod connecting rod; 18. a strut; 19. a first stud; 20. a connecting disc; 21. a support; 22. a thrust ring; 23. a thrust ring gland; 24. tightening the screw; 25. a second stud; 26. reinforcing the nut; 27. a flat washer; 28. a spring washer; 29. a second packing pad; 30. a second group of V-shaped packing; 31. a second slope sealing ring.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.
As shown in fig. 1-5, a high-temperature high-pressure self-sealing floating ball valve comprises a valve body 7 and an integrated valve cover 4, wherein a valve rod connecting rod 17 penetrates through the outer surface of the upper end of the valve body 7, a connecting disk 20 and a support 21 are sequentially sleeved on the outer side of the valve rod connecting rod 17 from bottom to top, a valve rod 10 is fixedly connected to the lower end of the valve rod connecting rod 17, a third disc spring group 11, a first packing pad 12, a first V-shaped packing group 13 and a first inclination sealing ring 14 are sequentially arranged between the outer side of the valve rod 10 and the inner side of the valve body 7 from bottom to top, a ball body 6 is fixedly connected to the lower end of the valve rod 10, the integrated valve cover 4 is embedded into one side of the valve body 7, a full-thread stud 1 penetrates through the outer surface of one side of the integrated valve cover 4, a nut 2 is in threaded connection with the outer side of the full-thread stud, the integrated valve cover 4 is embedded in the outer surface of the inner side of the valve body 7 and is sequentially provided with a second disc spring group 5, a second packing pad 29, a second V-shaped packing group 30 and a second inclination sealing ring 31 along the horizontal direction.
A thrust ring 22 and a thrust ring gland 23 are arranged between the upper end of the valve rod connecting rod 17 and the inner side of the bracket 21, a set screw 24 penetrates through the outer surface of the upper end of the bracket 21, and the lower end of the set screw 24 is in threaded connection with the inner side of the thrust ring gland 23, so that the stability of the thrust ring gland 23 is ensured; a second stud 25 penetrates through the edges of the support 21 and the connecting disc 20, reinforcing nuts 26 are connected to the upper end and the lower end of the second stud 25 in a threaded mode, a flat washer 27 and a spring washer 28 are filled between the reinforcing nuts 26 and the second stud 25 to ensure the fastening of the second stud 25, and the support 21 and the connecting disc 20 are fixedly connected through the second stud 25 to ensure the stable connection between the support 21 and the connecting disc 20; a supporting rod 18 is connected between the outer surface of the lower end of the connecting disc 20 close to the edge and the outer surface of the upper end of the valve body 7, the supporting rod 18 is fixedly connected with the valve body 7, a first stud 19 penetrates through the inner side of the supporting rod 18, and the lower end of the first stud 19 is connected to the inner side of the valve body 7 in a threaded mode so as to ensure the stability between the connecting disc 20 and the valve body 7; a pre-tightening nut 15 is arranged between the valve rod connecting rod 17 and the valve body 7, the pre-tightening nut 15 is sleeved on the outer side of the valve rod connecting rod 17, a flat key 16 is arranged between the valve rod connecting rod 17 and the pre-tightening nut 15, and the flat key 16 is movably embedded on the inner side of the valve rod connecting rod 17 so as to ensure the stability of the connection between the valve rod 10 and the valve rod connecting rod 17 and ensure that the rotation of the valve rod 10 and the valve rod connecting rod 17 is not influenced; a pre-tightening valve seat 8 is filled in one side of the ball body 6, which is opposite to the integrated valve cover 4, a disc spring 9 is arranged on one side of the pre-tightening valve seat 8 and used for applying pressure to the pre-tightening valve seat 8 to increase the sealing degree, and a cylindrical through hole which is coaxial with the ball body 6 penetrates through the valve body 7 and the integrated valve cover 4.
It should be noted that the utility model relates to a high temperature high pressure self sealss float ball valve, when using, possesses the structure of self sealss, and third belleville spring group 11 sets up at the sealed position of valve rod 10 and valve body 7 to adopt pretension nut 15 to strain the valve rod 10 self-locking, transmit the pretightning force of third belleville spring group 11 to first V type packing group 13 and first inclination sealing washer 14 through first packing pad 12, thereby realize sealedly; under low pressure, the sealing force of the first V-shaped packing group 13 and the first gradient sealing ring 14 is provided by the third belleville spring group 11; under the condition of high pressure, the sealing force of the first V-shaped packing group 13 and the first slope sealing ring 14 is provided by the third belleville spring group 11 and the medium acting force, so that the effect of self-sealing by pressure is achieved; under the condition of high temperature, the third disc spring group 11 and the medium acting force together provide sealing force, so that the first V-shaped packing group 13 and the first slope sealing ring 14 can achieve complete sealing as usual; meanwhile, the sealing part of the valve body 7 and the integrated valve cover 4 adopts a second disc spring group 5, a second packing pad 29, a second V-shaped packing group 30 and a second inclination sealing ring 31, which are similar to the structures and sealing principles of the valve rod 10 and the sealing part of the valve body 7, so that a better sealing effect can be achieved, and simultaneously, due to the elastic action of the first disc spring group 3, the pretightening force lost by elongation of a part of the full-tooth stud 1 can be compensated, the defect caused by the fact that a metal winding gasket or a pure graphite gasket is placed at the sealing part can be effectively avoided, and the integrated valve has a better self-sealing function.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The utility model provides a high temperature high pressure self sealss ball valve that floats, includes valve body (7) and integral type valve gap (4), its characterized in that: the outer surface of the upper end of the valve body (7) is connected with a valve rod connecting rod (17) in a penetrating manner, the outer side of the valve rod connecting rod (17) is sequentially sleeved with a connecting disc (20) and a support (21) from bottom to top, the lower end of the valve rod connecting rod (17) is fixedly connected with a valve rod (10), a third disc spring group (11), a first packing pad (12), a first V-shaped packing group (13) and a first inclination sealing ring (14) are sequentially arranged between the outer side of the valve rod (10) and the inner side of the valve body (7) from bottom to top, a ball body (6) is fixedly connected with the lower end of the valve rod (10), the integrated valve cover (4) is embedded on one side of the valve body (7), a full-tooth stud (1) penetrates through the outer surface of one side of the integrated valve cover (4), a nut (2) is in threaded connection with the outer side of the full-tooth stud (1), and a, the valve body (7) is fixedly connected with the integrated valve cover (4) through the full-tooth stud (1), and the integrated valve cover (4) is embedded in the outer surface of the inner side of the valve body (7) and is sequentially provided with a second disc spring set (5), a second packing pad (29), a second V-shaped packing set (30) and a second inclination sealing ring (31) in the horizontal direction.
2. The high temperature and high pressure self-sealing floating ball valve according to claim 1, wherein: a thrust ring (22) and a thrust ring gland (23) are arranged between the upper end of the valve rod connecting rod (17) and the inner side of the support (21), a set screw (24) penetrates through the outer surface of the upper end of the support (21), and the lower end of the set screw (24) is connected to the inner side of the thrust ring gland (23) in a threaded mode.
3. The high temperature and high pressure self-sealing floating ball valve according to claim 1, wherein: the edge of support (21) and connection pad (20) runs through and is provided with second double-screw bolt (25), the upper and lower both ends threaded connection of second double-screw bolt (25) has reinforcement nut (26), it has plain washer (27) and spring washer (28) to fill between reinforcement nut (26) and second double-screw bolt (25), pass through second double-screw bolt (25) fixed connection between support (21) and connection pad (20).
4. The high temperature and high pressure self-sealing floating ball valve according to claim 1, wherein: the lower extreme surface of connection pad (20) is close to and is connected with branch (18) between the upper end surface of edge and valve body (7), fixed connection between branch (18) and valve body (7), the inboard of branch (18) is run through has first double-screw bolt (19), the lower extreme threaded connection of first double-screw bolt (19) is to the inboard of valve body (7).
5. The high temperature and high pressure self-sealing floating ball valve according to claim 1, wherein: a pre-tightening nut (15) is arranged between the valve rod connecting rod (17) and the valve body (7), the pre-tightening nut (15) is sleeved on the outer side of the valve rod connecting rod (17), a flat key (16) is arranged between the valve rod connecting rod (17) and the pre-tightening nut (15), and the flat key (16) is movably embedded on the inner side of the valve rod connecting rod (17).
6. The high temperature and high pressure self-sealing floating ball valve according to claim 1, wherein: one side of the ball body (6) opposite to the integrated valve cover (4) is filled with a pre-tightening valve seat (8), one side of the pre-tightening valve seat (8) is provided with a disc spring (9), and the insides of the valve body (7) and the integrated valve cover (4) are traversed by a cylindrical circulation hole coaxial with the ball body (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921008445.9U CN210240757U (en) | 2019-07-01 | 2019-07-01 | High-temperature high-pressure self-sealing floating ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921008445.9U CN210240757U (en) | 2019-07-01 | 2019-07-01 | High-temperature high-pressure self-sealing floating ball valve |
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| Publication Number | Publication Date |
|---|---|
| CN210240757U true CN210240757U (en) | 2020-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921008445.9U Active CN210240757U (en) | 2019-07-01 | 2019-07-01 | High-temperature high-pressure self-sealing floating ball valve |
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| CN (1) | CN210240757U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114215949A (en) * | 2021-11-11 | 2022-03-22 | 洛阳双瑞特种装备有限公司 | Self-sealing device for preventing valve from leaking outside under high-temperature and high-pressure working conditions |
-
2019
- 2019-07-01 CN CN201921008445.9U patent/CN210240757U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114215949A (en) * | 2021-11-11 | 2022-03-22 | 洛阳双瑞特种装备有限公司 | Self-sealing device for preventing valve from leaking outside under high-temperature and high-pressure working conditions |
| CN114215949B (en) * | 2021-11-11 | 2024-05-28 | 中船双瑞(洛阳)特种装备股份有限公司 | Self-sealing device for preventing valve from leaking outside under high-temperature high-pressure working condition |
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