CN216715361U - Valve rod quantitative sealing structure of valve - Google Patents
Valve rod quantitative sealing structure of valve Download PDFInfo
- Publication number
- CN216715361U CN216715361U CN202123400872.1U CN202123400872U CN216715361U CN 216715361 U CN216715361 U CN 216715361U CN 202123400872 U CN202123400872 U CN 202123400872U CN 216715361 U CN216715361 U CN 216715361U
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- valve
- sealing
- pressure plate
- main body
- graphite packing
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- 238000007789 sealing Methods 0.000 title claims abstract description 116
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 48
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 48
- 239000010439 graphite Substances 0.000 claims abstract description 48
- 238000012856 packing Methods 0.000 claims abstract description 46
- 210000004907 gland Anatomy 0.000 claims abstract description 38
- 239000002184 metal Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model relates to the technical field of valve manufacturing, and discloses a valve rod quantitative sealing structure of a valve, which comprises a valve main body, wherein a valve rod is arranged in the valve main body, a lower graphite packing group is arranged in the middle of the inner periphery of the valve main body, the top end of the lower graphite packing group is fixedly connected to the bottom end of a thrust pad, sealing springs are uniformly distributed at the top end of the thrust pad, an upper graphite packing group is arranged in the middle of the inner periphery of a sealing gland, and the top end of the upper graphite packing group is fixedly connected to the bottom end of a sealing gland bush. According to the utility model, the sealing pressure plate is connected to the valve main body through the pressure plate nut and the pressure plate stud, the sealing pressure plate is tightly pressed on the sealing pressure sleeve through the adjusting pressure plate nut, so that the sealing pressure sleeve is tightly pressed on the upper part of the upper graphite packing group, the medium pressure is reduced after passing through the upper graphite packing group, and the use is very convenient.
Description
Technical Field
The utility model relates to the technical field of valve manufacturing, in particular to a valve rod quantitative sealing structure of a valve.
Background
The valve rod is an important part of the valve and is used for transmission, an actuating mechanism or a handle is connected to the valve rod, the valve core is directly driven to move or rotate below the actuating mechanism or the handle so as to achieve the opening and closing or adjusting effect of the valve, and the sealing structure is required to be adopted to ensure the sealing performance between the valve rod and the valve main body in the rotating process of the valve rod.
The common sealing structure achieves the purpose of sealing by adopting the self-carried tightness of threads, and has the following defects: firstly, when the rated operating pressure level of valve was too high, ordinary valve rod maximum bearing pressure was limited, and seal structure can not reduce the compressive stress of applying on the valve rod, can not realize effectively sealed, secondly need apply great vertical pressure on the valve rod face of cylinder and just can promote the valve rod and remove, and seal structure produces very big frictional force on the valve rod surface and hinders the valve rod motion, makes the switching torque of valve can be very big, causes the valve switch difficulty, and it is very inconvenient to use.
Disclosure of Invention
The utility model aims to solve the defects in the prior art, and provides a valve rod quantitative sealing structure of a valve.
In order to achieve the purpose, the utility model adopts the following technical scheme: a valve rod quantitative sealing structure of a valve comprises a valve main body, a valve rod is arranged in the valve main body, the upper part of the outer periphery of the valve rod is connected with the inner periphery of the sealing pressure plate in a sliding way, the middle part of the outer periphery of the valve rod is connected with the inner periphery of the sealing pressure cover in a sliding way, the middle part of the inner periphery of the valve main body is provided with a lower graphite packing group, the top end of the lower graphite packing group is fixedly connected with the bottom end of the thrust pad, sealing springs are uniformly distributed at the top end of the thrust pad, an upper graphite packing group is arranged in the middle of the inner periphery of the sealing gland, the top end of the upper graphite packing group is fixedly connected with the bottom end of the sealing pressing sleeve, a plurality of pressing plate studs are uniformly distributed at the top end of the sealing pressing plate, the bottom fixed connection of valve main part is on the top of base, the periphery of valve main part fixedly connected with goes up chassis and lower chassis in proper order.
As a further description of the above technical solution:
the sealing gland is in threaded connection with the top end of the valve main body through a gland screw.
As a further description of the above technical solution:
the pressing plate stud penetrates through the sealing pressing plate and the sealing gland in sequence and extends into the valve main body, and the upper portion of the periphery of the pressing plate stud is in threaded connection with the inner periphery of the pressing plate nut.
As a further description of the above technical solution:
and a metal sealing gasket is arranged at the joint of the inner periphery of the valve main body and the sealing gland.
As a further description of the above technical solution:
the inner periphery of the upper graphite packing group is connected to the outer periphery of the valve rod in a sliding mode.
As a further description of the above technical solution:
the inner periphery of the sealing pressure sleeve is connected to the outer periphery of the valve rod in a sliding mode, and the top end of the sealing pressure sleeve is fixedly connected to the bottom end of the sealing pressure plate.
As a further description of the above technical solution:
the bottom fixed connection of base is on the top of pipeline, the equal fixedly connected with flange in both ends about the periphery of pipeline.
As a further description of the above technical solution:
the upper chassis and the lower chassis are in threaded connection through chassis bolts, and chassis nuts are in threaded connection with the upper portion and the lower portion of the periphery of the chassis bolts.
The utility model has the following beneficial effects:
1. according to the utility model, firstly, the sealing pressure plate is connected to the valve main body at the upper part of the lower graphite packing group and between the valve rod and the sealing gland through the pressure plate nut and the pressure plate stud, then the sealing pressure plate is tightly pressed on the sealing pressure sleeve through adjusting the pressure plate nut, so that the sealing pressure sleeve is tightly pressed on the upper part of the upper graphite packing group, finally, the pressure stress transmitted to the cylindrical surface of the valve rod is reduced by the upper graphite packing group, the medium pressure is reduced after passing through the upper graphite packing group, the limited sealing is realized when the rated working pressure level of the valve reaches a higher level, and the use is very convenient.
2. In the utility model, firstly, a gland screw tightly fixes a gland on a valve body, a spring hole is formed in the gland, a sealing spring is arranged in the spring hole and is pressed on a thrust pad, the thrust pad tightly presses a lower graphite packing group, after assembly is finished, then the gland is tightly contacted with the thrust pad, the height of the spring hole of the gland is the working height of the sealing spring, the pressure acting on the thrust pad is ensured to be the total force of all the sealing springs, finally, after the thrust pad is stressed, the force is acted on the lower graphite packing group, the medium pressure can be intercepted by the lower graphite packing group, the maximum pressure stress transmitted to a valve rod of a cylindrical surface on the lower graphite packing group is reduced, the medium pressure is reduced after the lower graphite packing group, the stress on the valve rod of the valve is greatly reduced, the requirement on the strength of the valve rod of the valve is greatly reduced, and the stress on the valve rod of the valve is improved, meanwhile, the torque of the valve rod of the valve is greatly reduced, so that the valve is easy to operate and very convenient to use.
Drawings
Fig. 1 is a perspective view of a valve stem quantitative sealing structure of a valve according to the present invention;
FIG. 2 is a sectional view of a valve with a quantitative sealing structure for a valve stem according to the present invention;
fig. 3 is an enlarged view of a portion a in fig. 2.
Illustration of the drawings:
1. a pipeline; 2. a flange; 3. a base; 4. a lower chassis; 5. an upper chassis; 6. a chassis nut; 7. a chassis bolt; 8. a sealing gland; 9. a gland screw; 10. sealing and pressing the sleeve; 11. sealing the pressure plate; 12. a valve stem; 13. a platen stud; 14. a platen nut; 15. a valve body; 16. feeding a graphite filler group; 17. a lower graphite filler group; 18. a thrust pad; 19. a metal sealing gasket; 20. and sealing the spring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-3, one embodiment of the present invention is provided: a valve rod quantitative sealing structure of a valve comprises a valve body 15, a valve rod 12 is arranged inside the valve body 15, the upper part of the periphery of the valve rod 12 is connected with the inner periphery of a sealing pressure plate 11 in a sliding way, the middle part of the periphery of the valve rod 12 is connected with the inner periphery of a sealing gland 8 in a sliding way, a lower graphite packing group 17 is arranged in the middle part of the inner periphery of the valve body 15, the sealing between the valve rod 12 and the sealing gland 8 is realized by connecting the sealing pressure plate 11 to the valve body 15 through a pressure plate nut 14 and a pressure plate stud 13, and tightly pressing the sealing pressure plate 11 to a sealing pressure sleeve 10 through adjusting the pressure plate nut 14, so that the sealing pressure sleeve 10 is tightly pressed on the upper part of an upper graphite packing group 16, the upper graphite packing group 16 reduces the pressure stress transmitted to the cylindrical surface of the valve rod 12, the medium pressure is reduced after passing through the upper graphite packing group 16, and the limited sealing when the rated working pressure level of the valve reaches a higher level is realized, the top end of the lower graphite packing group 17 is fixedly connected to the bottom end of the thrust pad 18, the top end of the thrust pad 18 is uniformly distributed with sealing springs 20, the middle part of the inner periphery of the sealing gland 8 is provided with an upper graphite packing group 16, the top end of the upper graphite packing group 16 is fixedly connected to the bottom end of the sealing pressure sleeve 10, the top end of the sealing pressure plate 11 is uniformly distributed with a plurality of pressure plate studs 13, a spring hole is formed in the sealing gland 8, the sealing spring 20 is arranged in the spring hole and pressed on the thrust pad 18, the thrust pad 18 presses the lower graphite packing group 17, after assembly is completed, because the sealing gland 8 is tightly contacted with the thrust pad 18, the height of the spring hole of the sealing gland 8 is the working height of the sealing spring 20, the pressure acting on the thrust pad 18 is the total force of all the sealing springs 20, after the thrust pad 18 is stressed, the force is acted on the lower graphite packing group 17, and the medium pressure can be intercepted by the lower graphite packing group 17, valve rod 12 atress reduces by a wide margin, greatly reduced to the requirement of valve rod 12 intensity, improved valve rod 12's atress, also reduced valve rod 12's moment of torsion simultaneously by a wide margin, make the easy operation, the bottom fixed connection of valve main part 15 is on the top of base 3, base 3 plays the effect of support, chassis 5 and lower chassis 4 are gone up to the fixedly connected with in proper order in the periphery of valve main part 15, go up chassis 5 and lower chassis 4 and all weld in the periphery of valve main part 15.
The sealing gland 8 is in threaded connection with the top end of a valve main body 15 through a gland screw 9, the gland screw 9 tightly fixes the sealing gland 8 on the valve main body 15, a pressure plate stud 13 sequentially penetrates through a sealing pressure plate 11 and the sealing gland 8 and extends into the valve main body 15, the upper part of the outer periphery of the pressure plate stud 13 is in threaded connection with the inner periphery of a pressure plate nut 14, the sealing pressure plate 11 is connected onto the valve main body 15 through the pressure plate nut 14 and the pressure plate stud 13 in a sealing manner between the valve stem 12 and the sealing gland 8, the sealing pressure plate 11 is pressed against a sealing pressure sleeve 10 through adjusting the pressure plate nut 14, a metal sealing gasket 19 is arranged at the connection part of the inner periphery of the valve main body 15 and the sealing gland 8, the metal sealing gasket 19 plays a sealing role in preventing medium leakage, the inner periphery of an upper graphite packing group 16 is in sliding connection with the outer periphery of the valve stem 12, and the inner periphery of the sealing pressure sleeve 10 is in sliding connection with the outer periphery of the valve stem 12, top fixed connection of sealed pressure cover 10 is in the bottom of sealed pressure plate 11, compress tightly sealed pressure cover 10 to sealed pressure plate 11 through adjusting clamp plate nut 14, make sealed pressure cover 10 closely press on the upper portion of last graphite packing group 16, the bottom fixed connection of base 3 is on the top of pipeline 1, the equal fixedly connected with flange 2 in both ends about the periphery of pipeline 1, the installation of pipeline 1 of being convenient for, go up chassis 5 and lower chassis 4 and pass through chassis bolt 7 threaded connection, the equal threaded connection in upper portion and the lower part of chassis bolt 7's periphery has chassis nut 6, the joint strength of chassis 5 and lower chassis 4 is gone up in the increase.
The working principle is as follows: on the upper part of the lower graphite packing group 17, the sealing between the valve stem 12 and the sealing gland 8 is that the sealing pressure plate 11 is connected to the valve main body 15 through the pressure plate nut 14 and the pressure plate stud 13, the sealing pressure plate 11 is pressed tightly against the sealing pressure sleeve 10 through adjusting the pressure plate nut 14, so that the sealing pressure sleeve 10 is tightly pressed on the upper part of the upper graphite packing group 16, the upper graphite packing group 16 reduces the pressure stress transmitted to the cylindrical surface of the valve stem 12, the medium pressure is reduced after passing through the upper graphite packing group 16, the limited sealing when the rated working pressure level of the valve reaches a higher level is realized, the gland screw 9 tightly fixes the sealing gland 8 on the valve main body 15, the sealing gland 8 is provided with a spring hole, a sealing spring 20 is arranged in the spring hole and pressed on the thrust pad 18, the thrust pad 18 tightly presses the lower graphite packing group 17, after the assembly is completed, because the sealing gland 8 is tightly contacted with the thrust pad 18, the height of the spring hole of the sealing gland 8 is the working height of the sealing spring 20, the pressure acting on the thrust pad 18 is guaranteed to be the total force of all the sealing springs 20, after the thrust pad 18 is stressed, the force is applied to the lower graphite packing group 17, the medium pressure can be intercepted through the lower graphite packing group 17, the maximum pressure stress of the cylindrical surface of the transmission valve rod 12 at the lower graphite packing group 17 is reduced, the medium pressure is reduced after passing through the lower graphite packing group 17, the stress of the valve rod 12 is greatly reduced, the requirement on the strength of the valve rod 12 is greatly reduced, the stress of the valve rod 12 is improved, the torque of the valve rod 12 is greatly reduced, the operation is easy, and the use is very convenient.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.
Claims (8)
1. The utility model provides a valve rod quantitative seal structure of valve, includes valve body (15), its characterized in that: the valve comprises a valve main body (15), a valve rod (12) is arranged in the valve main body (15), the upper part of the outer periphery of the valve rod (12) is connected to the inner periphery of a sealing pressure plate (11) in a sliding manner, the middle part of the outer periphery of the valve rod (12) is connected to the inner periphery of a sealing pressure cover (8) in a sliding manner, a lower graphite packing group (17) is arranged in the middle part of the inner periphery of the valve main body (15), the top end of the lower graphite packing group (17) is fixedly connected to the bottom end of a thrust pad (18), sealing springs (20) are uniformly distributed at the top end of the thrust pad (18), an upper graphite packing group (16) is arranged in the middle part of the inner periphery of the sealing pressure cover (8), the top end of the upper graphite packing group (16) is fixedly connected to the bottom end of a sealing pressure sleeve (10), a plurality of pressure plate studs (13) are uniformly distributed at the top end of the sealing pressure plate (11), and the bottom end of the valve main body (15) is fixedly connected to the top end of a base (3), the periphery of the valve main body (15) is fixedly connected with an upper chassis (5) and a lower chassis (4) in sequence.
2. The quantitative sealing structure of valve stem of valve according to claim 1, wherein: the sealing gland (8) is in threaded connection with the top end of the valve main body (15) through a gland screw (9).
3. The quantitative sealing structure of valve stem of valve according to claim 1, wherein: the pressure plate stud (13) penetrates through the sealing pressure plate (11) and the sealing gland (8) in sequence and extends into the valve main body (15), and the upper portion of the periphery of the pressure plate stud (13) is in threaded connection with the inner periphery of the pressure plate nut (14).
4. The quantitative sealing structure of valve stem of valve according to claim 1, wherein: and a metal sealing gasket (19) is arranged at the joint of the inner periphery of the valve main body (15) and the sealing gland (8).
5. The quantitative sealing structure of valve stem of valve according to claim 1, wherein: the inner periphery of the upper graphite packing set (16) is connected with the outer periphery of the valve rod (12) in a sliding mode.
6. The quantitative sealing structure of valve stem of valve according to claim 1, wherein: the inner periphery of the sealing pressure sleeve (10) is connected to the outer periphery of the valve rod (12) in a sliding mode, and the top end of the sealing pressure sleeve (10) is fixedly connected to the bottom end of the sealing pressure plate (11).
7. The quantitative sealing structure of valve stem of valve according to claim 1, wherein: the bottom fixed connection of base (3) is on the top of pipeline (1), the equal fixedly connected with flange (2) in both ends about the periphery of pipeline (1).
8. The quantitative sealing structure of valve stem of valve according to claim 1, wherein: the upper chassis (5) and the lower chassis (4) are in threaded connection through chassis bolts (7), and the upper part and the lower part of the periphery of each chassis bolt (7) are in threaded connection with chassis nuts (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123400872.1U CN216715361U (en) | 2021-12-31 | 2021-12-31 | Valve rod quantitative sealing structure of valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123400872.1U CN216715361U (en) | 2021-12-31 | 2021-12-31 | Valve rod quantitative sealing structure of valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216715361U true CN216715361U (en) | 2022-06-10 |
Family
ID=81888558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123400872.1U Active CN216715361U (en) | 2021-12-31 | 2021-12-31 | Valve rod quantitative sealing structure of valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216715361U (en) |
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2021
- 2021-12-31 CN CN202123400872.1U patent/CN216715361U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 215000 No.42, Guijia lane, Suzhou Industrial Park, Suzhou City, Jiangsu Province Patentee after: Harbin Electric Suzhou Dauson Valve Co.,Ltd. Country or region after: China Address before: No.42, Guijia lane, Suzhou Industrial Park, Suzhou City, Jiangsu Province, 215026 Patentee before: SUZHOU DOUSON VALVE CO.,LTD. Country or region before: China |
|
| CP03 | Change of name, title or address |