CN218118818U - Valve cover sealing structure and valve device - Google Patents
Valve cover sealing structure and valve device Download PDFInfo
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- CN218118818U CN218118818U CN202123060697.6U CN202123060697U CN218118818U CN 218118818 U CN218118818 U CN 218118818U CN 202123060697 U CN202123060697 U CN 202123060697U CN 218118818 U CN218118818 U CN 218118818U
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Abstract
The utility model discloses a valve gap seal structure and valve gear, wherein, this valve gap seal structure includes: a peripheral seal assembly including an axial seal for axially sealing a gap between a valve cover and a valve body and a radial seal for radially sealing the gap between the valve cover and the valve body; the valve cover is further inserted with a valve rod, and the middle sealing assembly is used for sealing a radial gap between the valve cover and the valve rod. According to the arrangement, the peripheral sealing assembly comprises the axial sealing element and the radial sealing element, double sealing in the axial direction and the radial direction can be formed, and the sealing performance is better; the middle sealing component can ensure the sealing performance between the valve cover and the valve rod; that is to say, the embodiment of the utility model provides a seal structure both can realize the sealed between valve gap and the valve body, also can realize the sealed between valve rod and the valve gap.
Description
Technical Field
The utility model relates to a valve seal technical field, concretely relates to valve gap seal structure and valve gear.
Background
At present, a metal gasket is mainly adopted between the valve body and the valve cover to seal the axial butt joint of the valve cover and the valve body, and the sealing effect is poor.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a valve gap seal structure and valve gear, wherein, this valve gap seal structure both can realize the sealing between valve gap and the valve body, also can realize the sealing between valve rod and the valve gap, and is provided with axial seal spare and radial seal spare between valve gap and the valve body, can realize double sealing, and sealed effect is better.
In order to solve the technical problem, the utility model provides a valve gap seal structure, include: a peripheral seal assembly including an axial seal for axially sealing a gap between a valve cover and a valve body and a radial seal for radially sealing the gap between the valve cover and the valve body; the valve cover is further inserted with a valve rod, and the middle sealing assembly is used for sealing a radial gap between the valve cover and the valve rod.
With such arrangement, the peripheral sealing assembly in the embodiment of the present invention includes both an axial sealing element and a radial sealing element, which can form double sealing in the axial direction and the radial direction, and can better ensure the sealing performance between the valve cover and the valve body; the middle sealing component can ensure the sealing performance between the valve cover and the valve rod.
That is to say, the embodiment of the utility model provides a seal structure both can realize the sealed between valve gap and the valve body, also can realize the sealed between valve rod and the valve gap.
Optionally, the axial seal is a metal gasket.
Optionally, the radial seal is an elastomeric seal ring.
Optionally, the valve cover is provided with a stepped hole, and the stepped hole comprises a large-diameter hole section and a small-diameter hole section in the direction away from the interior of the valve body; the middle sealing assembly comprises a first sealing mechanism and a second sealing mechanism, the first sealing mechanism is used for sealing a gap between the small-diameter hole section and the valve rod, and the second sealing mechanism is used for sealing a gap between the large-diameter hole section and the valve rod.
Optionally, the first sealing mechanism is an elastic sealing ring.
Optionally, the second sealing mechanism includes a sealing filler, a baffle, and an elastic member, and the elastic member interacts with the baffle to encapsulate the sealing filler in the large-diameter hole section through the baffle.
Optionally, the sealing filler comprises hard skeleton layers and flexible filling layers which are alternately arranged along the axial direction, and the baffle is axially abutted against the hard skeleton layers.
Optionally, the hard skeleton layer is made of polytetrafluoroethylene, and the flexible filling layer is made of tetrapropylene fluoride.
Optionally, the elastic member is a spring, and the spring housing is mounted to the valve stem.
The utility model also provides a valve gear, including valve body, valve gap and valve rod, still include foretell valve gap seal structure.
Since the above-mentioned valve cap sealing structure has the technical effects, the valve device including the valve cap sealing structure also has similar technical effects, and therefore, the detailed description thereof is omitted.
Drawings
Fig. 1 is a schematic structural view of a specific embodiment of the valve cover sealing structure provided by the present invention.
The reference numerals in fig. 1 are illustrated as follows:
the sealing structure comprises 1 axial sealing element, 2 radial sealing elements, 3 first sealing mechanism, 4 second sealing mechanism, 41 sealing filler, 411 hard framework layer, 412 flexible filling layer, 42 baffle, 43 elastic element, 5 valve cover, 6 valve body and 7 valve rod.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
The terms "first," "second," and the like, herein are used for convenience in describing two or more structures or components that are identical or similar in structure and/or function and do not denote any particular limitation in order and/or importance.
Referring to fig. 1, fig. 1 is a schematic structural view of a specific embodiment of a valve cover sealing structure according to the present invention.
With reference to fig. 1, the valve device may include a valve body 6, an end of the valve body 6 is provided with an opening for inserting a valve rod 7, and the valve rod 7 may move relative to the valve body 6 to drive the valve element inside the valve body 6 to move, thereby enabling the valve device to be turned on or off. Further, the opening position of the valve body 6 is also provided with a valve cover 5 for plugging the opening position, and the valve cover 5 is provided with a through hole for the valve rod 7 to pass through.
To ensure the proper operation of the valve device, a sealing assembly is usually further provided between the valve cover 5 and the valve body 6 and between the valve rod 7 and the valve cover 5 for ensuring the sealing performance.
In particular to the embodiment of the utility model provides an in, the utility model provides a valve gap seal structure, including peripheral seal subassembly and middle part seal subassembly, wherein: the peripheral sealing assembly comprises an axial sealing member 1 and a radial sealing member 2, wherein the axial sealing member 1 is used for axially sealing an axial gap between the valve cover 5 and the valve body 6, and the radial sealing member 2 is used for radially sealing a radial gap between the valve cover 5 and the valve body 6; the mid-seal assembly is used to seal the radial gap between the bonnet 5 and the valve stem 7.
With the arrangement, the peripheral sealing assembly in the embodiment of the present invention includes both the axial sealing element 1 and the radial sealing element 2, which can form double sealing in the axial direction and the radial direction, and can better ensure the sealing performance between the valve cover 5 and the valve body 6; the middle sealing assembly can ensure the sealing performance between the valve cover 5 and the valve rod 7.
That is to say, the embodiment of the utility model provides a seal structure both can realize the sealed between valve gap 5 and the valve body 6, also can realize the sealed between valve rod 7 and the valve gap 5.
Here, the embodiments of the present invention do not limit the kinds and the number of the axial seal member 1 and the radial seal member 2, and in a specific practice, those skilled in the art may configure the sealing members according to actual needs. In an exemplary scheme, the axial sealing element 1 may be a metal gasket, and the number of the metal gasket may be one; the radial sealing element 2 may be an elastic sealing ring, such as an O-ring, or the like, and the number of the sealing elements may also be one.
In traditional scheme, only be provided with the metal gasket between valve gap 5 and the valve body 6, this kind of sealed form requires highly to the machining precision of valve gap 5 and valve body 6, and sealed effect is poor, causes the sealed face damage of part easily at the dismouting in-process that relapses, and the part is scrapped, and under influence such as high frequency vibrations, also easily takes off to cause defects such as hourglass easily. Therefore, the embodiment of the present invention provides an exemplary solution, which is provided with an elastic sealing ring, besides a metal gasket, and the sealing effect of the structure is good, which can be applied repeatedly, and after the loosening and releasing, the leakage can be repaired easily.
It is understood that the solution of providing the axial seal 1 as a metal gasket and the radial seal 2 as an elastic sealing ring is only an exemplary illustration of the embodiment of the present invention, and in a specific practice, the same sealing elements may be used for the axial seal 1 and the radial seal 2, for example, elastic sealing rings may be used for both, and this is also possible.
For the installation of realization to radial seal 2, can set up annular holding tank at the inner wall of valve body 6 or the outer wall of valve gap 5, when assembling, can install radial seal 2 in the holding tank, then install valve gap 5 in valve body 6, the mounting means of valve gap 5 and valve body 6 specifically can be threaded connection.
The structural form of the middle seal assembly may not be limited herein, and this is particularly relevant to the structural form of the valve cover 5 and the like. In practical applications, a person skilled in the art can flexibly adjust the sealing device according to the needs as long as a good sealing between the valve rod 7 and the valve cover 5 can be achieved.
In the embodiment of the drawings, as shown in fig. 1, the bonnet 5 may be provided with a stepped bore (not labeled), which may include a large-diameter bore section and a small-diameter bore section in a direction away from the interior of the valve body 6; the middle sealing assembly comprises a first sealing mechanism 3 and a second sealing mechanism 4, the first sealing mechanism 3 is used for sealing a radial gap between the small-diameter hole section and the valve rod 7, and the second sealing mechanism 4 is used for sealing a radial gap between the large-diameter hole section and the valve rod 7. Thus, the middle seal assembly can seal the gap between the valve rod 7 and the bonnet 5 at two positions, i.e., the large-diameter hole section and the small-diameter hole section, so that the sealing performance can be better ensured.
In detail, the first sealing mechanism 3 may also be an elastic sealing ring, such as an O-ring, and when being installed, an annular receiving groove may be formed on an inner hole wall of the small-diameter hole section or an outer rod wall of the valve rod 7, so as to install the first sealing mechanism 3; the second sealing mechanism 4 may include a sealing packing 41, a baffle 42, and an elastic member 43, and the elastic member 43 may be in a compressed state and may interact with the baffle 42 to encapsulate the sealing packing 41 in the large-diameter hole section through the baffle 42, so that a radial gap between the large-diameter hole section and the valve rod 7 may be sealed.
With the structure, in the long-term use process, if the sealing packing 4 is worn, the elastic part 43 in a compressed state can generate extrusion force on the sealing packing 41 through the baffle plate 42, so that the sealing packing 41 can still seal the gap between the valve rod 7 and the large-diameter hole section, and the sealing performance in the long-term use process can be better ensured.
The sealing packing 41 may include hard skeleton layers 411 and flexible filling layers 412 alternately arranged along the axial direction, and the baffle 42 may be axially abutted against the hard skeleton layers 411 to reduce abrasion of the baffle 42 to the flexible filling layers 412. With reference to fig. 1, the hard skeleton layer 411 and the flexible filling layer 412 may be tapered, and under the action of the elastic member 43, the tapered small-diameter end may generate a contraction force to reliably close the gap between the valve stem 7 and the large-diameter hole section.
In specific practice, the hard skeleton layer 411 may be made of ptfe, the flexible filling layer 412 may be made of ptfe, and both of the ptfe and the flexible filling layer may be used at a higher temperature for a long time, so as to increase the operating temperature of the valve device.
The type of the elastic member 43 is not limited herein, and in practice, the skilled person can select the elastic member according to actual needs, for example, the elastic member 43 may be an elastic element in the form of a spring, an elastic block, an elastic ball, etc. In the embodiment of the drawings, the elastic member 43 may be a spring, and is externally fitted to the valve rod 7, and one end of the spring may abut against the stopper 42 and the other end of the spring may abut against the inner wall surface of the valve body 6.
The utility model relates to a valve device, including valve body 6, valve gap 5 and valve rod 7, be provided with the valve gap seal structure that above-mentioned each embodiment relates between valve body 6 and the valve gap 5, between valve rod 7 and the valve gap 5 for realize between valve body 6 and the valve gap 5 and the sealing between valve rod 7 and the valve gap 5.
Since the valve cover sealing device has the above technical effects, the valve device having the valve cover sealing device also has similar technical effects, and thus the detailed description thereof is omitted.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A valve cover sealing structure, comprising:
a peripheral sealing assembly comprising an axial seal (1) and a radial seal (2), the axial seal (1) being for axially sealing a gap between a valve cover (5) and a valve body (6), the radial seal (2) being for radially sealing a gap between the valve cover (5) and the valve body (6);
the valve cover (5) is also inserted with a valve rod (7), and the middle sealing assembly is used for sealing a radial gap between the valve cover (5) and the valve rod (7);
the valve cover (5) is provided with a stepped hole, and the stepped hole comprises a large-diameter hole section and a small-diameter hole section along the direction far away from the interior of the valve body (6); the middle sealing assembly comprises a first sealing mechanism (3) and a second sealing mechanism (4), the first sealing mechanism (3) is used for sealing a gap between the small-diameter hole section and the valve rod (7), and the second sealing mechanism (4) is used for sealing a gap between the large-diameter hole section and the valve rod (7).
2. A valve cover sealing structure according to claim 1, characterized in that the axial seal member (1) is a metal gasket.
3. A valve cover sealing structure according to claim 1, wherein the radial seal member (2) is an elastic seal ring.
4. A valve cover sealing structure according to any one of claims 1-3, characterized in that the first sealing means (3) is an elastic sealing ring.
5. A valve cover sealing structure according to any one of claims 1-3, characterized in that the second sealing mechanism (4) comprises a sealing packing (41), a baffle plate (42) and an elastic member (43), wherein the elastic member (43) interacts with the baffle plate (42) to encapsulate the sealing packing (41) in the large-diameter hole section through the baffle plate (42).
6. The valve cover sealing structure according to claim 5, characterized in that the sealing packing (41) comprises a hard skeleton layer (411) and a flexible packing layer (412) which are alternately arranged along the axial direction, and the baffle (42) is abutted with the hard skeleton layer (411) along the axial direction.
7. The valve cover sealing structure according to claim 6, wherein the hard skeleton layer (411) is made of polytetrafluoroethylene, and the flexible filling layer (412) is made of tetrapropylfluoride.
8. A valve cover sealing structure according to claim 5, wherein the elastic member (43) is a spring, and the spring is externally fitted to the valve stem (7).
9. A valve device comprising a valve body (6), a bonnet (5) and a valve stem (7), characterized by further comprising a bonnet sealing structure as claimed in any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123060697.6U CN218118818U (en) | 2021-12-07 | 2021-12-07 | Valve cover sealing structure and valve device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123060697.6U CN218118818U (en) | 2021-12-07 | 2021-12-07 | Valve cover sealing structure and valve device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218118818U true CN218118818U (en) | 2022-12-23 |
Family
ID=84493979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123060697.6U Active CN218118818U (en) | 2021-12-07 | 2021-12-07 | Valve cover sealing structure and valve device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218118818U (en) |
-
2021
- 2021-12-07 CN CN202123060697.6U patent/CN218118818U/en active Active
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