CN210770628U - Regulating valve packing sealing structure - Google Patents
Regulating valve packing sealing structure Download PDFInfo
- Publication number
- CN210770628U CN210770628U CN202020134034.0U CN202020134034U CN210770628U CN 210770628 U CN210770628 U CN 210770628U CN 202020134034 U CN202020134034 U CN 202020134034U CN 210770628 U CN210770628 U CN 210770628U
- Authority
- CN
- China
- Prior art keywords
- packing
- valve
- graphite
- hole
- cover
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Details Of Valves (AREA)
- Lift Valve (AREA)
Abstract
The utility model provides a governing valve packing structure, the governing valve includes: the valve comprises an upper valve cover, a valve rod and a packing pressing plate, wherein the upper valve cover is provided with a step hole, the step hole comprises a large hole and a small hole, and the large hole is close to the outer side of the upper valve cover; the valve rod penetrates through the step hole, and the packing pressure plate is used for axially compressing the regulating valve packing sealing structure in the large hole; the governing valve packing structure includes: the polytetrafluoroethylene packing and the graphite packing are both arranged in the large hole and surround the valve rod, and the polytetrafluoroethylene packing is positioned on one side, far away from the inner cavity of the upper valve cover, of the graphite packing. Has the characteristics of leakage prevention and long service life.
Description
Technical Field
The utility model relates to a seal structure field of governing valve especially relates to a governing valve packing structure.
Background
The patent CN 203147018U "ultra-low temperature valve rod triple seal structure", the cryogenic valve packing seal structure that introduces, completely became invalid in actual operation. Because the PCTFE filler directly contacts with a low-temperature medium, the PTFE filler can be hardened and lose elasticity, and easily leaks and loses effect under the high pressure of the medium.
The patent CN 203979388U "a dual packing seal ring set for low temperature regulating valve" describes the V-shaped teflon which also has the above-mentioned problems.
Patent CN 109827005a "ultra-low temperature valve fugitive combined packing structure and sealing method", the sealing method described contains asbestos components prohibited by national regulations, and belongs to the technical category which is not allowed.
The above all have the problem of easy leakage.
Disclosure of Invention
In view of the above shortcomings of the prior art, an object of the present invention is to provide a packing structure of a control valve, which is used for solving the problem of leakage at the dynamic seal position of the valve rod in the prior art.
To achieve the above and other related objects, the present invention provides a packing structure for a control valve, the control valve comprising: the valve comprises an upper valve cover, a valve rod and a packing pressing plate, wherein the upper valve cover is provided with a step hole, the step hole comprises a large hole and a small hole, and the large hole is close to the outer side of the upper valve cover; the valve rod penetrates through the step hole, and the packing pressure plate is used for axially compressing the regulating valve packing sealing structure in the large hole;
the governing valve packing structure includes:
the polytetrafluoroethylene filler and the graphite filler are both arranged in the large hole and surround the valve rod, and the polytetrafluoroethylene filler is positioned on one side, far away from the inner cavity of the upper valve cover, of the graphite filler.
Optionally, the cross section of the tetrafluoro filler is V-shaped.
Optionally, the cross section of the graphite filler is rectangular.
Optionally, the regulating valve packing structure further comprises a gasket, the gasket is chemically more reactive than graphite, and the gasket is located on one side of the graphite packing close to the inner cavity of the upper valve cover.
Optionally, the liner is made of a zinc material.
Optionally, the regulating valve packing structure further includes a hard spacer, an inner ring of the hard spacer is in sliding contact with the valve rod, the hard spacer is located between the graphite packing and the tetrafluoro packing, and/or the hard spacer is located on one side of the graphite packing, which is close to the inner cavity of the upper valve cover.
Optionally, the hard spacer is made of hard plastic.
Optionally, the packing plate is close to one side of the upper valve cover inner cavity is provided with a pressing ring, the pressing ring is inboard in sealing fit with the valve rod, and the pressing ring is outboard in sealing fit with the position of the large hole opening.
Optionally, the inner side of the pressing ring and the outer side of the pressing ring are sealed through rubber sealing rings.
Optionally, the regulating valve packing structure further comprises a supporting pad, the supporting pad is of a hard structure, the inner diameter of the supporting pad is larger than the outer diameter of the valve rod, the graphite packing is arranged on one side close to the inner cavity of the upper valve cover, and/or the graphite packing is arranged between the supporting pad and the tetrafluoro packing, and/or the tetrafluoro packing is arranged on one side far away from the inner cavity of the upper valve cover and is provided with the supporting pad.
As described above, the utility model discloses a governing valve packing structure has following beneficial effect at least:
through the combined design of tetrafluoro filler and graphite packing, and graphite packing is close to one side of going up the valve gap inner chamber, and graphite packing has higher stability, and the liquid chemical composition of going up the valve gap inner chamber is complicated, and graphite packing has higher chemical stability, and it can guarantee to seal and can reduce simultaneously and be corroded, protects tetrafluoro packing to have better sealed effect, have higher life simultaneously.
Drawings
Fig. 1 shows a schematic diagram of the packing structure of the regulating valve of the present invention.
Element number description: the valve comprises an upper valve cover 1, a valve rod 2, a packing pressing plate 3, a stepped hole 11, a large hole 111, a small hole 112, a tetrafluoro packing 4, a graphite packing 5, a gasket 6, a hard spacer 7, a pressing ring 8, a rubber sealing ring seal 81 and a supporting pad 9.
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
Please refer to fig. 1. It should be understood that the structure, ratio, size and the like shown in the drawings of the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention does not have the essential significance in the technology, and any modification of the structure, change of the ratio relationship or adjustment of the size should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that can be achieved. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
The following examples are for illustrative purposes only. The various embodiments may be combined, and are not limited to what is presented in the following single embodiment.
Referring to fig. 1, the present invention provides an embodiment of a packing structure of a regulating valve, the regulating valve includes: the valve comprises an upper valve cover 1, a valve rod 2 and a packing pressing plate 3, wherein the upper valve cover 1 is provided with a step hole 11, the step hole 11 comprises a large hole 111 and a small hole 112, and the large hole 111 is close to the outer side of the upper valve cover 1; the valve rod 2 penetrates through the stepped hole 11, and the packing press plate 3 is used for axially pressing the regulating valve packing sealing structure in the large hole 111; the governing valve packing structure includes: the composite material comprises a tetrafluoro filler 4 and a graphite filler 5, wherein optionally, the tetrafluoro filler 4 is V-shaped in section. Optionally, the cross section of the graphite filler 5 is rectangular. The tetrafluoro filler 4 and the graphite filler 5 are both arranged in the large hole 111 and surround the valve rod 2, and the tetrafluoro filler 4 is positioned on one side, far away from the inner cavity of the upper valve cover 1, of the graphite filler 5. Through the combined design of tetrafluoro filler 4 and graphite filler 5, and graphite filler 5 is close to one side of 1 inner chamber of upper valve cover, and graphite filler 5 has higher stability, and the liquid chemical composition of 1 inner chamber of upper valve cover is complicated, and graphite filler 5 has higher chemical stability, and it can guarantee to seal and can reduce simultaneously and be corroded, protects tetrafluoro filler 4 to have better sealed effect.
In this embodiment, referring to fig. 1, the regulating valve packing structure further includes a gasket 6, the gasket 6 has a chemical property that is more active than a chemical property of graphite, and the gasket 6 is located on a side of the graphite packing 5 close to an inner cavity of the upper bonnet 1. Through the arrangement of the gasket 6, the gasket 6 is corroded first when the liquid in the inner cavity of the upper valve cover 1 is corroded, so that the purpose of protecting the graphite packing 5 is achieved, and optionally, the gasket 6 is made of a zinc material.
In this embodiment, referring to fig. 1, the packing seal structure of the regulating valve further includes a hard spacer 7, an inner ring of the hard spacer 7 is in sliding contact with and is matched with the valve rod 2, the hard spacer 7 is located between the graphite packing 5 and the tetrafluoro packing 4, and/or the hard spacer 7 is located on one side of the graphite packing 5 close to the inner cavity of the upper bonnet 1. The hard spacer 7 is sleeved on the valve rod 2, so that the valve rod 2 is guided, and the problem of filler leakage caused by deformation of the valve rod 2 due to radial offset caused by external force on each filler is avoided or reduced. Optionally, the hard spacer 7 is made of hard plastic. The guiding function of the valve rod 2 is ensured, and simultaneously, the valve rod 2 is not scratched in the sliding process.
In this embodiment, referring to fig. 1, a pressing ring 8 is disposed on one side of the packing pressing plate 3 close to the inner cavity of the upper bonnet 1, the inner side of the pressing ring 8 is in sealing fit with the valve rod 2, and the outer side of the pressing ring 8 is in sealing fit with the opening of the large hole 111. The setting of clamping ring 8 for guaranteed to carry out the axial with packing and compressed tightly, still guaranteed simultaneously that packing and external isolation are sealed. Optionally, the inner side of the pressing ring 8 and the outer side of the pressing ring 8 are sealed 81 by rubber sealing rings. The rubber sealing ring can be an O-shaped rubber sealing ring.
In this embodiment, please refer to fig. 1, the packing structure of the regulating valve further includes a supporting pad 9, the supporting pad 9 is a hard structure, the inner diameter of the supporting pad 9 is larger than the outer diameter of the valve rod 2, and the supporting pad 9 is disposed on one side of the graphite packing 5 close to the inner cavity of the upper valve cover 1. Supporting pad 9 plays the supporting role, and supporting pad 9 can be metallic structure, and the internal diameter of supporting pad 9 is greater than the external diameter of valve rod 2 for supporting pad 9 does not contact with valve rod 2, has avoided supporting pad 9 to cause the scratch to valve rod 2. The supporting pad 9 is matched with the V-shaped tetrafluoro filler 4. The cross section of the supporting pad 9 can also be designed into a V-shaped or inverted V-shaped structure corresponding to the cross section of the PTFE filler 4 matched with the V shape.
In this embodiment, referring to fig. 1, the supporting pad 9 is disposed between the graphite filler 5 and the tetrafluoro filler 4.
In this embodiment, referring to fig. 1, a support pad 9 is disposed on a side of the tetrafluoro filler 4 away from an inner cavity of the upper valve cover 1.
To sum up, the utility model discloses a tetrafluoro filler 4 and graphite filler 5's integrated design, and graphite filler 5 is close to one side of 1 inner chamber of upper valve gap, graphite filler 5 has higher stability, the liquid chemical composition of 1 inner chamber of upper valve gap is complicated, graphite filler 5 has higher chemical stability, it can guarantee to seal and can reduce simultaneously and be corroded, protection tetrafluoro filler 4, thereby have better sealed effect, through the combination of above embodiment, make the packing structure of this scheme have the high life and reach ISO-15848 low leakage standard requirement. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A regulator valve packing structure, the regulator valve comprising: the valve comprises an upper valve cover, a valve rod and a packing pressing plate, wherein the upper valve cover is provided with a step hole, the step hole comprises a large hole and a small hole, and the large hole is close to the outer side of the upper valve cover; the valve rod penetrates through the step hole, and the packing pressure plate is used for axially compressing the regulating valve packing sealing structure in the large hole;
it is characterized in that the regulating valve packing sealing structure comprises:
the polytetrafluoroethylene packing and the graphite packing are both arranged in the large hole and surround the valve rod, and the polytetrafluoroethylene packing is positioned on one side, far away from the inner cavity of the upper valve cover, of the graphite packing.
2. The regulator valve packing structure of claim 1, wherein: the section of the tetrafluoro filler is V-shaped.
3. The regulator valve packing structure of claim 1, wherein: the section of the graphite filler is rectangular.
4. The regulator valve packing structure of claim 1, wherein: the regulating valve packing seal structure further includes a gasket having a chemistry that is more reactive than graphite chemistry, the gasket being located on a side of the graphite packing proximate the upper bonnet cavity.
5. The regulator valve packing structure of claim 4, wherein: the liner is made of a zinc material.
6. The regulator valve packing structure of claim 1, wherein: the regulating valve packing sealing structure further comprises a hard spacer, an inner ring of the hard spacer is in sliding contact fit with the valve rod, the hard spacer is located between the graphite packing and the tetrafluoro packing, and/or the hard spacer is located on one side, close to the inner cavity of the upper valve cover, of the graphite packing.
7. The regulator valve packing structure of claim 6, wherein: the hard spacer is made of hard plastics.
8. The regulator valve packing structure of claim 1, wherein: the packing clamp plate is close to one side of the upper valve cover inner cavity is provided with a pressing ring, the pressing ring is inboard in sealing fit with the valve rod, and the pressing ring is outboard in sealing fit with the position of the large hole opening.
9. The regulator valve packing structure of claim 8, wherein: the inboard of clamping ring with the outside of clamping ring all is sealed through rubber seal.
10. The regulator valve packing structure of claim 1, wherein: the regulating valve packing structure further comprises a supporting pad, the supporting pad is of a hard structure, the inner diameter of the supporting pad is larger than the outer diameter of the valve rod, the graphite packing is close to one side of the inner cavity of the upper valve cover, the supporting pad is arranged, and/or the graphite packing is arranged between the graphite packing and the tetrafluoro packing, and/or the tetrafluoro packing is far away from one side of the inner cavity of the upper valve cover, and the supporting pad is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020134034.0U CN210770628U (en) | 2020-01-20 | 2020-01-20 | Regulating valve packing sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020134034.0U CN210770628U (en) | 2020-01-20 | 2020-01-20 | Regulating valve packing sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210770628U true CN210770628U (en) | 2020-06-16 |
Family
ID=71049837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020134034.0U Active CN210770628U (en) | 2020-01-20 | 2020-01-20 | Regulating valve packing sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210770628U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117146046A (en) * | 2023-10-30 | 2023-12-01 | 江苏大田阀门制造有限公司 | Filling sealing structure of regulating valve |
-
2020
- 2020-01-20 CN CN202020134034.0U patent/CN210770628U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117146046A (en) * | 2023-10-30 | 2023-12-01 | 江苏大田阀门制造有限公司 | Filling sealing structure of regulating valve |
| CN117146046B (en) * | 2023-10-30 | 2023-12-29 | 江苏大田阀门制造有限公司 | Filling sealing structure of regulating valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210770628U (en) | Regulating valve packing sealing structure | |
| CN210566623U (en) | Novel butterfly valve canned type packs and presses cover structure | |
| CN201047459Y (en) | Durable composite sealed type valve | |
| CN213575593U (en) | Multi-stage sealing butterfly valve | |
| CN205078828U (en) | Ball valve is fixed to upper assembling type bellows | |
| CN208778722U (en) | Piston assembly structure with automatic core-adjusting sealing function in solenoid valve | |
| CN101451625B (en) | Double sealing valve structure | |
| CN205808631U (en) | In order to detect the device of carbon seal ring ring seal performance | |
| CN217422306U (en) | Sealing structure of safety valve | |
| CN213776559U (en) | Air rail sealing device | |
| CN201014032Y (en) | Filler ring structure of regulation valve and regulation valve having same | |
| CN208311637U (en) | A kind of packing seal structure | |
| CN216430511U (en) | Long-acting sealing medical gas safety valve | |
| CN221647645U (en) | Low leakage gate valve | |
| CN217108218U (en) | Prevent cage governing valve of leakage | |
| CN220452004U (en) | Plastic cap with self-sealing function | |
| CN212251270U (en) | High-pressure cut-off ball valve | |
| CN221003780U (en) | Spherical valve port pad | |
| CN221237246U (en) | Ultra-low temperature valve anti-leakage self-sealing structure | |
| CN207798192U (en) | A kind of shell of gas meter seal assembly | |
| CN209385648U (en) | A kind of sealing structure | |
| CN2132040Y (en) | Leakproof pressure stop valve | |
| CN219366869U (en) | Strip-shaped sealing ring and gas supply control valve with same | |
| CN215861790U (en) | Soft-sealing low-temperature butterfly valve | |
| CN217003343U (en) | Straight stroke valve rod seal assembly |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |