CN201507716U - Valve rod sealing structure capable of maintenance with pressure - Google Patents
Valve rod sealing structure capable of maintenance with pressure Download PDFInfo
- Publication number
- CN201507716U CN201507716U CN 200920210159 CN200920210159U CN201507716U CN 201507716 U CN201507716 U CN 201507716U CN 200920210159 CN200920210159 CN 200920210159 CN 200920210159 U CN200920210159 U CN 200920210159U CN 201507716 U CN201507716 U CN 201507716U
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- CN
- China
- Prior art keywords
- valve rod
- ring
- seal ring
- valve
- seal
- 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.)
- Expired - Lifetime
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Abstract
The utility model relates to a valve rod sealing structure capable of maintenance with pressure, which comprises a valve cover, a pressing cover, a push ring, a clamping ring, a valve rod, a dust blocking ring, a first sealing ring, a second sealing ring, a third sealing ring and a gate plate. The dust blocking ring, the first sealing ring, the second sealing ring, the clamping ring and the valve rod are fixed at the inner part of the pressing cover by bolts; the dust blocking ring is arranged at the top part between the valve rod and the pressing cover, the first sealing ring and the second sealing ring build two seals between the valve rod and the pressing cover, and the third sealing ring builds an upper seal between the valve rod and the valve cover. Compared with the prior art, the valve rod sealing structure has the following advantages: the operation torque is small, the adjusting workload of padding is reduced, and the padding can be replaced at any time in emergency.
Description
Technical field
The utility model relates to a kind of valve rod leak-proof structure, especially relates to a kind of with pressing the valve rod leak-proof structure of safeguarding.
Background technique
Valve stem seal is the position of the easiest appearance " run, drip, leak " in the valve.Existing valve rod adopts the seal form of packing filling more, referring to Fig. 1.The filler impacting force causes operating the increase of moment of torsion greatly, need often tighten filler causes maintenance workload big, when changing, filler can only when valve wide open, nothing pressure, not carry out, much in emergency circumstances, as the medium in the pipeline can not stop, valve is in complete shut-down or middle aperture can not change, and can't carry out the operation that filler is changed.
Summary of the invention
The purpose of this utility model is exactly to provide a kind of with pressing the valve rod leak-proof structure of safeguarding for the defective that overcomes above-mentioned prior art existence.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of with pressing the valve rod leak-proof structure of safeguarding, it is characterized in that, this structure comprises valve gap, gland, throw-out collar, snap ring, valve rod, dust-blocking ring, first seal ring, second seal ring, the 3rd seal ring, flashboard, described dust-blocking ring, first seal ring, second seal ring, snap ring, valve rod are by being bolted to the inside of gland, described dust-blocking ring is arranged on the top between valve rod and gland, described first seal ring, second seal ring make up the two seals between valve rod and gland, and described the 3rd seal ring makes up the sealing of going up of valve rod and valve cover chamber.
Described first seal ring, second seal ring are O shape rubber seal.
Described the 3rd seal ring is the V-arrangement rubber seal.
Described throw-out collar and snap ring are the bilateral symmetry annulus that cuts from the centre.
Described valve rod is provided with the twice groove, and card has snap ring in the last groove, and card has throw-out collar in the lower groove, and described valve rod lower end is threaded with flashboard.
Compared with prior art, the utlity model has following advantage:
1, O shape rubber seal has the pressure self sealing action, need not extra sealing impacting force, has reached the effect that reduces the valve operation moment of torsion, exempts regular maintenance.
2, the acting in conjunction of valve rod, snap ring, throw-out collar can be when valve be in any aperture of standard-sized sheet, complete shut-down or centre, and the leakage of minimizing or stop valve rod seal is convenient to change the seal ring operation, has reached and has in emergency circumstances got rid of the effect of leaking fast.
3, snap ring, throw-out collar are held in valve lever clamp in the valve gap, and valve rod falls in the valve gap or valve rod is gone out the personnel that cause by hydraulic pressure and injured when having avoided the replacing seal ring, has reached the effect of safety work.
Description of drawings
Fig. 1 is the prior art constructions schematic representation;
Fig. 2 is a kind of structural representation of changing seal ring with the valve rod leak-proof structure of press safeguarding when the flashboard standard-sized sheet of the utility model;
Fig. 3 is a kind of structural representation of changing seal ring with the valve rod leak-proof structure of press safeguarding at the flashboard complete shut-down or when middle of the utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is elaborated.
Embodiment
As shown in Figure 2, a kind of with pressing the valve rod leak-proof structure of safeguarding, this structure comprises valve gap 1, gland 5, valve rod 6, dust-blocking ring 7, first seal ring 8, second seal ring 9, the 3rd seal ring 10, flashboard 11.In described gland 5 remains on dust-blocking ring 7, first seal ring 8, second seal ring 9, snap ring 4, valve rod 6, and be fixed on the valve gap 1 by bolt 3.Described dust-blocking ring 7 is arranged on the top of 5 on valve rod 6 and gland.Described first seal ring 8, second seal ring 9 are O shape rubber seal, form the two seals of 5 on valve rod 6 and gland.Described the 3rd seal ring 10 is the V-arrangement rubber seal, forms the sealing of going up of 1 of valve rod 6 and valve gap.Described throw-out collar 2 and snap ring 4 are the bilateral symmetry annulus that cuts from the centre, may be stuck on the valve rod 6.Have the twice groove on the described valve rod 6, card has snap ring 4 in the last groove, and card has throw-out collar 2 in the lower groove, be clamped in the valve gap 1, and the valve rod 6 lower ends flashboard 11 that is being threaded, flashboard 11 will move up and down during rotation valve rod 6.Snap ring 4, throw-out collar 2 are clamped in valve rod 6 in the valve gap 1, and valve rod 6 falls in the valve gap 1 or valve rod 6 is gone out the personnel that cause by hydraulic pressure and injured when having avoided the replacing seal ring, has reached the effect of safety work.
Normally just doing under the state, first seal ring 8, second seal ring 9, the 3rd seal ring 10 have formed the sealing of valve rod 6, valve rod 6 axial force up and down when snap ring 4 bears operation.O shape rubber seal has the pressure self sealing action, need not extra sealing impacting force, has reached the effect that reduces the valve operation moment of torsion, exempts regular maintenance.
If during valve rod 6 seal leakages, can be with flashboard 11 standard-sized sheets, this moment, flashboard 11 upwards promoted throw-out collar 2, pushes the 3rd seal ring 10 decrement is increased, and leakage will reduce or stop.After the leakage that valve rod 6 seals reduces or stops, can carrying out the replacing operation of first seal ring 8, second seal ring 9.
As shown in Figure 3, if flashboard necessary complete shut-down 11 this moments, bolt 3 can be unscrewed a little, and towards closing valve direction rotation valve rod 6 about half-turns, the gap 12 that makes 1 of gland 5 and valve gap form 3mm to 5mm, this moment, valve rod 6 upwards promoted throw-out collar 2, pushes the 3rd seal ring 10 decrement is increased, and leakage will reduce or stop.After the leakage that valve rod 6 seals reduces or stops, can carrying out the replacing operation of first seal ring 8, second seal ring 9.
If the aperture that flashboard 11 mediates at this moment can be unscrewed bolt 3 a little, the gap 12 that makes 1 of gland 5 and valve gap form 3mm to 5mm, hydraulic pressure upwards promotes valve rod 6, this moment, valve rod 6 upwards promoted throw-out collar 2, pushes the 3rd seal ring 10 decrement is increased, and leakage will reduce or stop.After the leakage that valve rod 6 seals reduces or stops, can carrying out the replacing operation of first seal ring 8, second seal ring 9.
Claims (5)
- One kind can be with the valve rod leak-proof structure of press safeguarding, it is characterized in that, this structure comprises valve gap, gland, throw-out collar, snap ring, valve rod, dust-blocking ring, first seal ring, second seal ring, the 3rd seal ring, flashboard, described dust-blocking ring, first seal ring, second seal ring, snap ring, valve rod are by being bolted to the inside of gland, described dust-blocking ring is arranged on the top between valve rod and gland, described first seal ring, second seal ring make up the two seals between valve rod and gland, and described the 3rd seal ring makes up the sealing of going up of valve rod and valve cover chamber.
- 2. according to claim 1 a kind of with pressing the valve rod leak-proof structure of safeguarding, it is characterized in that described first seal ring, second seal ring are O shape rubber seal.
- 3. according to claim 1 a kind of with pressing the valve rod leak-proof structure of safeguarding, it is characterized in that described the 3rd seal ring is the V-arrangement rubber seal.
- 4. a kind of valve rod leak-proof structure with the pressure maintenance according to claim 1 is characterized in that described throw-out collar and snap ring are the bilateral symmetry annulus that cuts from the centre.
- 5. a kind of valve rod leak-proof structure with the pressure maintenance according to claim 1 is characterized in that described valve rod is provided with the twice groove, and card has snap ring in the last groove, and blocking in the lower groove has throw-out collar, and described valve rod lower end is threaded with flashboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920210159 CN201507716U (en) | 2009-09-25 | 2009-09-25 | Valve rod sealing structure capable of maintenance with pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920210159 CN201507716U (en) | 2009-09-25 | 2009-09-25 | Valve rod sealing structure capable of maintenance with pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201507716U true CN201507716U (en) | 2010-06-16 |
Family
ID=42468843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200920210159 Expired - Lifetime CN201507716U (en) | 2009-09-25 | 2009-09-25 | Valve rod sealing structure capable of maintenance with pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201507716U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102032388B (en) * | 2009-09-25 | 2012-07-25 | 上海冠龙阀门机械有限公司 | Valve rod sealing structure capable of being maintained with voltage |
-
2009
- 2009-09-25 CN CN 200920210159 patent/CN201507716U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102032388B (en) * | 2009-09-25 | 2012-07-25 | 上海冠龙阀门机械有限公司 | Valve rod sealing structure capable of being maintained with voltage |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100616 |