CN220581829U - Valve rod sealing structure of axial flow type regulating valve - Google Patents
Valve rod sealing structure of axial flow type regulating valve Download PDFInfo
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- CN220581829U CN220581829U CN202322257557.0U CN202322257557U CN220581829U CN 220581829 U CN220581829 U CN 220581829U CN 202322257557 U CN202322257557 U CN 202322257557U CN 220581829 U CN220581829 U CN 220581829U
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- lip
- guide sleeve
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- 238000007789 sealing Methods 0.000 title claims abstract description 193
- 230000001105 regulatory effect Effects 0.000 title abstract description 13
- 230000000694 effects Effects 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 19
- 239000010687 lubricating oil Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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Abstract
The utility model discloses a valve rod sealing structure of an axial flow type regulating valve, and relates to the technical field of pipeline valves. The utility model is provided with a sealing element locking nut at the end part of the valve rod, which is used for locking the sealing ring, replacing an O-shaped sealing ring close to the sealing element locking nut with a lip-shaped sealing ring, and arranging an elastic element inside the lip-shaped sealing ring. The sealing element lock nut is convenient to detach, install and lock the lip-shaped sealing ring, and the elastic element in the lip-shaped sealing ring can ensure high sealing performance of the lip-shaped sealing ring in a special environment. When the valve rod slides left and right, pressure is generated, and the pressure forces the two valve lips of the lip-shaped sealing ring to open, so that a sealing effect is generated.
Description
Technical Field
The utility model relates to the technical field of pipeline valves, in particular to a valve rod sealing structure of an axial flow type regulating valve.
Background
The axial flow type regulating valve is mainly used for gas-liquid conveying pipelines of natural gas, petroleum and the like and is used as a regulating component for downstream flow or pressure control. The existing axial flow type regulating valve generally adopts an electric split type regulating valve, a driving rod is driven to rotate through a driving assembly, the driving rod is in inclined threaded fit with a valve rod, and the valve rod moves left and right in a valve rod guide sleeve through rotation of the driving rod, so that opening and closing control and opening control of the axial flow type regulating valve are realized.
The valve rod sealing structure of the existing axial flow type regulating valve is generally characterized in that a plurality of O-shaped sealing rings are arranged at the end part of a valve rod to seal (as shown in figure 1), and the inner wall of the end part of a valve rod guide sleeve is provided with the plurality of O-shaped sealing rings to seal (as shown in figure 2) so as to prevent media from escaping between the valve rod and the valve rod guide sleeve.
The O-shaped sealing ring in the existing valve rod sealing structure is worn after long-time use, the sealing performance can be poor, and the O-shaped sealing ring in the sealing structure is not easy to disassemble and replace.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the utility model provides a valve rod sealing structure of an axial flow type regulating valve, and aims to solve the problems that an O-shaped sealing ring of the existing valve rod sealing structure is poor in sealing performance due to long-time abrasion and is not easy to disassemble and replace. The utility model provides a novel valve rod sealing structure, wherein a sealing element locking nut is arranged at the end part of a valve rod and used for locking a sealing ring, an O-shaped sealing ring close to the sealing element locking nut is replaced by a lip-shaped sealing ring, and an elastic element is arranged inside the lip-shaped sealing ring. The sealing element lock nut is convenient to detach, install and lock the lip-shaped sealing ring, and the elastic element in the lip-shaped sealing ring can ensure high sealing performance of the lip-shaped sealing ring in a special environment. When the valve rod slides left and right, pressure is generated, and the pressure forces the two valve lips of the lip-shaped sealing ring to open, so that a sealing effect is generated.
In order to solve the problems in the prior art, the utility model is realized by the following technical scheme.
The utility model provides a valve rod sealing structure of an axial flow type regulating valve, wherein the front end of a valve rod is provided with a threaded hole for assembling a sealing element lock nut, a plurality of valve rod sealing grooves are formed in a rod body at the end part of the valve rod, sealing elements are arranged in each valve rod sealing groove, the outer edge of the sealing element lock nut is provided with an extending part extending towards the axial direction of the valve rod, the front end of the valve rod is a small-diameter section, the outer edge of the sealing element lock nut is sleeved on the small-diameter section and matched with the rod body of the valve rod to form a first valve rod sealing groove, a lip-shaped sealing ring I is arranged in the first valve rod sealing groove, and an elastic element is arranged between two lip leaves of the lip-shaped sealing ring I.
Further preferably, two valve rod sealing grooves are formed in the end rod body of the valve rod, namely a first valve rod sealing groove and a second valve rod sealing groove, and an O-shaped sealing ring is arranged in the second valve rod sealing groove.
Still more preferably, an oil storage tank is provided at one side of the second stem seal groove, and the oil storage tank communicates with the second stem seal groove.
Further preferably, the O-shaped sealing rings are arranged in the rest valve rod sealing grooves except the first valve rod sealing groove, and oil storage grooves are formed in one sides of the valve rod sealing grooves provided with the O-shaped sealing rings and are communicated with the corresponding valve rod sealing grooves.
Further preferably, a plurality of guide sleeve sealing grooves are formed in the inner wall of the outlet end of the valve rod guide sleeve, and at least one guide sleeve sealing groove is provided with a lip-shaped sealing ring II.
Still more preferably, the remaining guide sleeve seal grooves are fitted with O-ring seals.
Still more preferably, two guide sleeve sealing grooves are arranged on the inner wall of the outlet end of the valve rod guide sleeve, wherein one guide sleeve sealing groove is provided with a lip-shaped sealing ring II, and the other guide sleeve sealing groove is provided with an O-shaped sealing ring.
Still more preferably, the guide sleeve sealing groove for installing the lip seal ring II is positioned on the inner side of the guide sleeve sealing groove for assembling the O-shaped sealing ring.
Still more preferably, an elastic piece is arranged between two valve lips of the lip-shaped sealing ring II.
Still more preferably, an oil storage tank is arranged at one side of the guide sleeve sealing groove provided with the O-shaped sealing ring, and the oil storage tank is communicated with the corresponding guide sleeve sealing groove.
Compared with the prior art, the beneficial technical effects brought by the utility model are as follows:
1. the end part of the valve rod is arranged into the small-diameter section, so that the small-diameter section is matched with the extension part of the sealing element locking nut to form a first valve rod sealing groove, and the lip-shaped sealing ring I is conveniently assembled in the first valve rod sealing groove. And the sealing rings of other valve rod sealing grooves are convenient to install. According to the utility model, the O-shaped sealing ring close to the sealing member locking nut is replaced by the lip-shaped sealing ring, and the elastic member is arranged inside the lip-shaped sealing ring. The sealing element lock nut is convenient to detach, install and lock the lip-shaped sealing ring, and the elastic element in the lip-shaped sealing ring can ensure high sealing performance of the lip-shaped sealing ring in a special environment. When the valve rod slides left and right, pressure is generated, and the pressure forces the two valve lips of the lip-shaped sealing ring to open, so that a sealing effect is generated.
2. The O-shaped sealing ring can be used for sealing in the sealing grooves of other valve rods, meanwhile, an oil storage groove is formed in one side of the sealing groove of the valve rod, on which the O-shaped sealing ring is installed, and the oil storage groove is arranged, so that the sliding structure of the valve rod can be protected, and the service life of the O-shaped sealing ring can be prolonged.
3. According to the utility model, the sealing ring combination which is the same as the end part of the valve rod is arranged on the inner wall of the end part of the valve rod guide sleeve, so that the sealing performance of the end part of the valve rod guide sleeve can be improved, and a medium is prevented from entering the valve rod guide sleeve.
Drawings
FIG. 1 is a schematic diagram of a seal arrangement at the end of a valve stem of a conventional axial flow regulator valve;
FIG. 2 is a schematic diagram of a seal structure of an end of a valve stem guide sleeve of a conventional axial flow regulator valve;
FIG. 3 is a schematic view of the seal structure of the valve stem end of the axial flow regulator valve of the present utility model;
FIG. 4 is a schematic view of the seal structure of the end of the valve stem guide sleeve of the axial flow regulator valve of the present utility model;
FIG. 5 is a schematic view of the lip seal of the present utility model;
FIG. 6 is a schematic view of the overall structure of an axial flow regulator valve employing the valve stem seal of the present utility model;
reference numerals: 1. valve rod, 2, screw hole, 3, sealing member lock nut, 4, extension, 5, minor diameter section, 6, first valve rod seal groove, 7, lip seal circle I, 8, lip leaf, 9, elastic component, 10, second valve rod seal groove, 11, oil storage tank, 12, O type sealing washer, 13, valve rod uide bushing, 14, uide bushing seal groove, 15, lip seal circle II.
Detailed Description
The following are example embodiments of the utility model defined by the claims and their equivalents, taken in conjunction with the accompanying drawings, in which the specific details are to be regarded as illustrative only and not limiting the scope of the utility model. Accordingly, various changes and modifications to the embodiments may be made by one of ordinary skill in the art without departing from the scope and spirit of the utility model.
Example 1
As a preferred embodiment of the utility model, referring to fig. 6 of the specification, the utility model discloses a valve rod sealing structure of an axial flow type regulating valve, referring to fig. 3 of the specification, a threaded hole 2 for assembling a sealing member lock nut 3 is formed at the front end of a valve rod 1, two valve rod sealing grooves are formed on the end rod body of the valve rod 1, sealing members are arranged in each valve rod sealing groove, an extending part 4 extending towards the axial direction of the valve rod 1 is arranged at the outer edge of the sealing member lock nut 3, a small diameter section 5 is arranged at the front end of the valve rod 1, the outer edge of the sealing member lock nut 3 is sleeved on the small diameter section 5 and matched with the rod body of the valve rod 1 to form a first valve rod sealing groove 6, a lip sealing ring I7 is arranged in the first valve rod sealing groove 6, and an elastic member 9 is arranged between two lip leaves 8 of the lip sealing ring I7 and referring to fig. 5 of the specification.
As an implementation manner of this embodiment, two stem seal grooves are provided at the end of the stem 1, a lip seal ring i 7 with an elastic member 9 is mounted to the first stem seal groove 6 located at the outer layer, and an O-ring 12 is mounted to the second stem seal groove 10 located at the inner layer.
When assembling, the sealing element locking nut 3 is not assembled at the end part of the valve rod 1, then the O-shaped sealing ring 12 in the second valve rod sealing groove 10 only needs to pass through the valve rod 1 rod body between the first valve rod sealing ring and the second valve rod sealing ring, compared with the existing sealing structure, the installation of the O-shaped sealing ring 12 in the second valve rod sealing groove 10 is simpler, after the installation of the O-shaped sealing ring 12 in the second valve rod sealing groove 10 is completed, the lip-shaped sealing ring I7 with the elastic piece 9 is sleeved on the small diameter section 5 of the valve rod 1, and then the sealing element locking nut 3 is screwed, so that the assembly of the sealing ring is completed.
In order to further ensure the service life of the O-ring 12 in the second valve rod sealing groove 10 and smooth sliding of the valve rod 1, an oil storage groove 11 is formed on one side of the second valve rod sealing groove 10, the oil storage groove 11 is communicated with the second valve rod sealing groove 10, and corresponding lubricating oil is arranged in the oil storage groove 11, so that the sliding of the valve rod 1 in the valve rod guiding sleeve 13 is facilitated under the action of the lubricating oil, and the service life of the O-ring 12 can be prolonged.
Referring to fig. 5 of the specification, in this embodiment, an elastic member 9 is provided between two lips 8 of a lip seal ring i 7, and when a valve rod 1 slides left and right, pressure is generated, and the pressure forces the two lips 8 of the lip seal ring to open, so as to generate a sealing effect. The elastic piece 9 increases the elasticity between the two valve lips 8 of the lip seal ring, and provides sufficient elasticity for the two valve lips 8 of the lip seal ring so as to improve the sealing performance.
Example 2
As a further preferred embodiment of the present utility model, this embodiment is further detailed supplement and explanation of the technical solution of the present utility model based on embodiment 1 described above.
The embodiment discloses valve rod seal structure of axial-flow type governing valve, screw hole 2 that is used for assembling sealing member lock nut 3 has been seted up at the front end of valve rod 1, be provided with multichannel valve rod seal groove on the tip body of rod of valve rod 1, all be provided with the sealing member in every valve rod seal groove, the outer fringe of sealing member lock nut 3 is provided with the extension 4 to valve rod 1 axial extension, valve rod 1 front end is minor diameter section 5, the outer fringe cover of sealing member lock nut 3 is established on minor diameter section 5, form first valve rod seal groove 6 with the cooperation of valve rod 1 body of rod, be provided with lip seal circle I7 in first valve rod seal groove 6, be provided with elastic component 9 between the two valve lips 8 of lip seal circle I7.
As an example of this embodiment, O-rings 12 are provided in the remaining stem seal grooves except the first stem seal groove 6, and oil storage grooves 11 are provided on one sides of the stem seal grooves where the O-rings 12 are installed, and the oil storage grooves 11 are communicated with the corresponding stem seal grooves.
As yet another example of this embodiment, at least one valve stem seal groove is provided with lip seal I7, and similarly, all valve stem seal grooves may be provided with lip seal I7.
Example 3
As a further preferred embodiment of the present utility model, this embodiment is further elaborated and supplemented with the technical solution of the present utility model on the basis of embodiment 1 or embodiment 2 described above.
In this embodiment, referring to fig. 4 of the specification, two guide sleeve seal grooves 14 are provided on the inner wall of the outlet end of the valve rod guide sleeve 13, one guide sleeve seal groove 14 is provided with a lip seal ring ii 15, and the other guide sleeve seal groove 14 is provided with an O-ring 12. The guide sleeve sealing groove 14 provided with the lip-shaped sealing ring II 15 is positioned on the inner side of the guide sleeve sealing groove 14 provided with the O-shaped sealing ring 12. An elastic piece 9 is arranged between the two valve lips 8 of the lip-shaped sealing ring II 15. An oil storage tank 11 is arranged on one side of a guide sleeve sealing groove 14 provided with an O-shaped sealing ring 12, and the oil storage tank 11 is communicated with the corresponding guide sleeve sealing groove 14.
Example 4
As a further preferred embodiment of the present utility model, this embodiment is further elaborated and supplemented with the technical solution of the present utility model on the basis of embodiment 1, embodiment 2 or embodiment 3 described above. In this embodiment, a plurality of guide sleeve sealing grooves 14 are formed in the inner wall of the outlet end of the valve rod guide sleeve 13, and a lip seal ring II 15 is assembled in at least one guide sleeve sealing groove 14. The remaining guide sleeve seal groove 14 is fitted with an O-ring seal 12. The guide sleeve sealing groove 14 provided with the lip-shaped sealing ring II 15 is positioned on the inner side of the guide sleeve sealing groove 14 provided with the O-shaped sealing ring 12. An elastic piece 9 is arranged between the two valve lips 8 of the lip-shaped sealing ring II 15. An oil storage tank 11 is arranged on one side of a guide sleeve sealing groove 14 provided with an O-shaped sealing ring 12, and the oil storage tank 11 is communicated with the corresponding guide sleeve sealing groove 14.
In the above embodiment, the oil storage tank 11 is oriented towards the threaded section of the valve rod 1, so that the lubricating oil in the oil storage tank 11 is prevented from escaping into the medium.
While the present inventive concept has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present utility model as defined by the following claims.
Claims (10)
1. Valve rod seal structure of axial flow type governing valve, its characterized in that: screw holes (2) for assembling sealing member lock nuts (3) are formed in the front end of a valve rod (1), a plurality of valve rod seal grooves are formed in the end rod body of the valve rod (1), sealing members are arranged in each valve rod seal groove, an extending portion (4) extending towards the axial direction of the valve rod (1) is arranged on the outer edge of each sealing member lock nut (3), the front end of the valve rod (1) is a small-diameter section (5), the outer edge of each sealing member lock nut (3) is sleeved on the small-diameter section (5), a first valve rod seal groove (6) is formed by being matched with the valve rod body of the valve rod (1), a lip seal ring I (7) is arranged in the first valve rod seal groove (6), and an elastic piece (9) is arranged between two lip leaves (8) of the lip seal ring I (7).
2. The valve stem seal of an axial flow regulator valve of claim 1, wherein: two valve rod sealing grooves are formed in the end rod body of the valve rod (1), namely a first valve rod sealing groove (6) and a second valve rod sealing groove (10), and an O-shaped sealing ring (12) is arranged in the second valve rod sealing groove (10).
3. The valve stem seal of an axial flow regulator valve according to claim 2, wherein: an oil storage tank (11) is arranged on one side of the second valve rod sealing groove (10), and the oil storage tank (11) is communicated with the second valve rod sealing groove (10).
4. The valve stem seal of an axial flow regulator valve of claim 1, wherein: o-shaped sealing rings (12) are arranged in the rest valve rod sealing grooves except the first valve rod sealing groove (6), oil storage grooves (11) are formed in one sides of the valve rod sealing grooves provided with the O-shaped sealing rings (12), and the oil storage grooves (11) are communicated with the corresponding valve rod sealing grooves.
5. The valve stem seal of an axial flow regulator valve according to any one of claims 1 to 4, wherein: a plurality of guide sleeve sealing grooves (14) are formed in the inner wall of the outlet end of the valve rod guide sleeve (13), and a lip-shaped sealing ring II (15) is assembled in at least one guide sleeve sealing groove (14).
6. The valve stem seal of an axial flow regulator valve of claim 5, wherein: the rest of the guide sleeve sealing grooves (14) are provided with O-shaped sealing rings (12).
7. The valve stem seal of an axial flow regulator valve of claim 5, wherein: two guide sleeve sealing grooves (14) are formed in the inner wall of the outlet end of the valve rod guide sleeve (13), a lip-shaped sealing ring II (15) is assembled in one guide sleeve sealing groove (14), and an O-shaped sealing ring (12) is assembled in the other guide sleeve sealing groove (14).
8. The valve stem seal of an axial flow regulator valve of claim 7, wherein: the guide sleeve sealing groove (14) provided with the lip-shaped sealing ring II (15) is positioned at the inner side of the guide sleeve sealing groove (14) provided with the O-shaped sealing ring (12).
9. The valve stem seal of an axial flow regulator valve of claim 5, wherein: an elastic piece (9) is arranged between two valve lips (8) of the lip-shaped sealing ring II (15).
10. The valve stem seal of an axial flow regulator valve of claim 6, wherein: an oil storage tank (11) is arranged on one side of a guide sleeve sealing groove (14) provided with an O-shaped sealing ring (12), and the oil storage tank (11) is communicated with the corresponding guide sleeve sealing groove (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322257557.0U CN220581829U (en) | 2023-08-22 | 2023-08-22 | Valve rod sealing structure of axial flow type regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322257557.0U CN220581829U (en) | 2023-08-22 | 2023-08-22 | Valve rod sealing structure of axial flow type regulating valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220581829U true CN220581829U (en) | 2024-03-12 |
Family
ID=90110282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322257557.0U Active CN220581829U (en) | 2023-08-22 | 2023-08-22 | Valve rod sealing structure of axial flow type regulating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220581829U (en) |
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2023
- 2023-08-22 CN CN202322257557.0U patent/CN220581829U/en active Active
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