CN215763609U - Self-adjusting valve stem rotary seal - Google Patents
Self-adjusting valve stem rotary seal Download PDFInfo
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- CN215763609U CN215763609U CN202121572829.0U CN202121572829U CN215763609U CN 215763609 U CN215763609 U CN 215763609U CN 202121572829 U CN202121572829 U CN 202121572829U CN 215763609 U CN215763609 U CN 215763609U
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Abstract
The utility model discloses a self-adjusting valve rod rotation sealing device which comprises a valve rod penetrating through a valve cover, wherein a sealing cavity is formed in the top surface of the valve cover, a limiting nut is fixed on the upper portion of the valve rod through threads, an elastic butterfly sheet is arranged on the bottom wall of the sealing cavity, a special-shaped packing body is arranged above the elastic butterfly sheet, a metal gasket is arranged above the special-shaped packing body, a graphite fireproof pad is arranged above the metal gasket, a pressing sleeve is arranged above the graphite fireproof pad, a butterfly spring is arranged between the top surface of the pressing sleeve and the limiting nut, the special-shaped packing body comprises an annular packing body, a depressed area is formed in the center of the top surface of the annular packing body, a V-shaped buffer groove is formed in the outer ring surface of the annular packing body, and an inverted V-shaped abutting groove is formed in the bottom surface of the annular packing body. The graphite fireproof gasket has the advantages of reasonable structural arrangement, guarantee of the integral sealing performance, contribution to prolonging of the service life of the graphite fireproof gasket, guarantee of use safety and reliability, reliable use sealing performance, strong self-adjusting performance, good applicability and strong practicability.
Description
Technical Field
The utility model belongs to the technical field of valves, and particularly relates to a self-adjusting valve rod rotation sealing device.
Background
The valve mainly comprises a valve body, a valve seat, a valve core and a valve rod fixed on the valve core, wherein a valve cover is arranged on the valve body, when the valve body is assembled, sealing filler and a sealing ring are arranged between the valve rod and the valve cover, the valve body can meet the use requirement of general conditions, but no pretightening force structure exists, when the valve is used for a long time, the use sealing performance of the valve body is easily influenced, the service life of the graphite filler is short under the action of periodic load, graphite is easy to break and cause leakage, the use stability of the graphite filler can also be influenced, and the applicability and the practicability are limited.
Disclosure of Invention
The utility model aims to provide a self-adjusting valve rod rotary sealing device which is reasonable in structural arrangement and high in applicability.
The technical scheme for realizing the purpose of the utility model is that the self-adjusting valve rod rotation sealing device comprises a valve rod penetrating through a valve cover, a sealing cavity is arranged on the top surface of the valve cover, a limit nut is fixed on the upper part of the valve rod through threads, an upward inclined elastic butterfly sheet is arranged on the bottom wall of the sealing cavity, a special-shaped packing body is arranged above the elastic butterfly sheet, a metal gasket is arranged above the special-shaped packing body, a graphite fireproof pad is arranged above the metal gasket, a pressing sleeve is arranged above the graphite fireproof pad, a butterfly spring is arranged between the top surface of the pressing sleeve and the limit nut, the special-shaped packing body comprises an annular packing body, a depressed area is arranged at the center of the top surface of the annular packing body, a V-shaped buffer groove is arranged on the outer annular surface of the annular packing body, and an inverted V-shaped groove is arranged on the bottom surface of the annular packing body, the inclined top end of the elastic butterfly sheet is pressed in the inverted V-shaped pressing groove, and the valve rod is pressed on the inner annular surface of the annular packing body.
The inner wall upper portion in sealed chamber has seted up a plurality of horizontal hole, and a plurality of horizontal hole is in on the same disc, horizontal downthehole being provided with supports the compression leg, support the compression leg with be provided with between the end wall in horizontal hole and support the compression spring, vertical bar groove has been seted up on the outer wall of pressure cover, it is in to support the compression leg support the effect of compression spring is gone into down the card vertical bar inslot.
The annular filler body is an annular structure formed by extrusion molding of engineering plastics and Teflon, and the height of the annular filler body is 1/3-1/2 of the depth of the sealing cavity.
The surface of the metal gasket is wrapped with a sealing rubber film layer.
The utility model has the positive effects that: the novel graphite fire-proof gasket is reasonable in structure arrangement, the special-shaped packing body is matched with the elastic butterfly sheet and the butterfly spring, the annular packing body has a self-tightening adjusting sealing function through the abutting and pressing limiting of the limiting nut, the elastic butterfly sheet at the bottom provides internal self-adjusting pretightening force to guarantee the overall sealing performance, meanwhile, the graphite fire-proof gasket and the metal gasket provide fire-proof performance, the service life of the graphite fire-proof gasket is prolonged, the leakage situation is not prone to occurring, the use safety and reliability are guaranteed, the normal position of the valve rod can be kept when the valve rod rotates to run and a fire disaster occurs, the use sealing performance is reliable, the friction coefficient is low, the self-adjusting performance is strong, the applicability is good, and the practicability is strong.
Drawings
In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
(example 1)
Fig. 1 shows an embodiment of the present invention, wherein fig. 1 is a schematic structural diagram of the present invention.
Referring to fig. 1, the self-adjusting valve rod rotating sealing device comprises a valve rod 2 penetrating through a valve cover 1, a sealing cavity 3 is arranged on the top surface of the valve cover, a limit nut 4 is fixed on the upper portion of the valve rod through threads, an elastic butterfly sheet 5 inclining upwards is arranged on the bottom wall of the sealing cavity, a special-shaped packing body 6 is arranged above the elastic butterfly sheet, a metal gasket 7 is arranged above the special-shaped packing body, a graphite fireproof pad 8 is arranged above the metal gasket, a pressing sleeve 9 is arranged above the graphite fireproof pad, a butterfly spring 10 is arranged between the top surface of the pressing sleeve and the limit nut, the special-shaped packing body 6 comprises an annular packing body 61, a depressed area 62 is arranged in the center of the top surface of the annular packing body, a V-shaped buffer groove 63 is arranged on the outer annular packing body, an inverted V-shaped abutting groove 64 is arranged on the bottom surface of the annular packing body, the inclined top end of the elastic butterfly sheet is pressed in the inverted V-shaped pressing groove, and the valve rod is pressed on the inner annular surface of the annular packing body.
A plurality of transverse hole 11 has been seted up on the inner wall upper portion in sealed chamber, and a plurality of transverse hole is in on same disc, transverse hole is downthehole to be provided with supports compression leg 12, support the compression leg with be provided with between the end wall in transverse hole and support compression spring 13, vertical bar groove 14 has been seted up on the outer wall of pressure cover, it is in to support the compression leg support the effect of compression spring is gone into down the card vertical bar inslot.
The annular filler body is an annular structure formed by extrusion molding of engineering plastics and Teflon, and the height of the annular filler body is 1/3-1/2 of the depth of the sealing cavity.
The surface of the metal gasket is wrapped with a sealing rubber film layer.
The novel graphite fire-proof gasket is reasonable in structure arrangement, the special-shaped packing body is matched with the elastic butterfly sheet and the butterfly spring, the annular packing body has a self-tightening adjusting sealing function through the abutting and pressing limiting of the limiting nut, the elastic butterfly sheet at the bottom provides internal self-adjusting pretightening force to guarantee the overall sealing performance, meanwhile, the graphite fire-proof gasket and the metal gasket provide fire-proof performance, the service life of the graphite fire-proof gasket is prolonged, the leakage situation is not prone to occurring, the use safety and reliability are guaranteed, the normal position of the valve rod can be kept when the valve rod rotates to run and a fire disaster occurs, the use sealing performance is reliable, the friction coefficient is low, the self-adjusting performance is strong, the applicability is good, and the practicability is strong.
The standard parts used in the present embodiment can be purchased directly from the market, and the non-standard structural parts described in the specification can also be obtained directly by processing according to the common general knowledge of the prior art without any doubt, and the connection mode of the parts adopts the conventional means matured in the prior art, and the machines, parts and equipment adopt the conventional models in the prior art, so that the detailed description is not given here.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And such obvious changes and modifications which fall within the spirit of the utility model are deemed to be covered by the present invention.
Claims (4)
1. The utility model provides a self-interacting valve rod rotary seal device, includes the valve rod of wearing to establish on the valve gap, the top surface of valve gap is provided with sealed chamber, valve rod upper portion thread tightening has spacing nut, its characterized in that: the special-shaped packing structure is characterized in that an elastic butterfly sheet which inclines upwards is arranged on the bottom wall of the sealing cavity, a special-shaped packing body is arranged above the elastic butterfly sheet, a metal gasket is arranged above the special-shaped packing body, a graphite fireproof pad is arranged above the metal gasket, a pressing sleeve is arranged above the graphite fireproof pad, a butterfly spring is arranged between the top surface of the pressing sleeve and the limiting nut, the special-shaped packing body comprises an annular packing body, a depressed area is formed in the center of the top surface of the annular packing body, a V-shaped buffer groove is formed in the outer annular surface of the annular packing body, an inverted V-shaped abutting groove is formed in the bottom surface of the annular packing body, the inclined top end of the elastic butterfly sheet abuts against the inverted V-shaped abutting groove, and the valve rod abuts against the inner annular surface of the annular packing body.
2. The self-adjusting stem rotary seal of claim 1, wherein: the inner wall upper portion in sealed chamber has seted up a plurality of horizontal hole, and a plurality of horizontal hole is in on the same disc, horizontal downthehole being provided with supports the compression leg, support the compression leg with be provided with between the end wall in horizontal hole and support the compression spring, vertical bar groove has been seted up on the outer wall of pressure cover, it is in to support the compression leg support the effect of compression spring is gone into down the card vertical bar inslot.
3. The self-adjusting stem rotary seal of claim 2, wherein: the annular filler body is an annular structure formed by extrusion molding of engineering plastics and Teflon, and the height of the annular filler body is 1/3-1/2 of the depth of the sealing cavity.
4. The self-adjusting stem rotary seal of claim 3 wherein: the surface of the metal gasket is wrapped with a sealing rubber film layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121572829.0U CN215763609U (en) | 2021-07-12 | 2021-07-12 | Self-adjusting valve stem rotary seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121572829.0U CN215763609U (en) | 2021-07-12 | 2021-07-12 | Self-adjusting valve stem rotary seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215763609U true CN215763609U (en) | 2022-02-08 |
Family
ID=80104909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121572829.0U Active CN215763609U (en) | 2021-07-12 | 2021-07-12 | Self-adjusting valve stem rotary seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215763609U (en) |
-
2021
- 2021-07-12 CN CN202121572829.0U patent/CN215763609U/en active Active
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