CN204083483U - A kind of pipeline valve valve rod leak-proof structure - Google Patents
A kind of pipeline valve valve rod leak-proof structure Download PDFInfo
- Publication number
- CN204083483U CN204083483U CN201420495992.5U CN201420495992U CN204083483U CN 204083483 U CN204083483 U CN 204083483U CN 201420495992 U CN201420495992 U CN 201420495992U CN 204083483 U CN204083483 U CN 204083483U
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- China
- Prior art keywords
- stuffing box
- filler
- valve rod
- valve
- middle flange
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Abstract
The utility model discloses a kind of pipeline valve valve rod leak-proof structure, belong to valve technology field, after mainly solving problem of leakage that existing valve rod sealing configuration causes and occurring leaking outside, be convenient for changing the technical problem of filler, its technological scheme adopts multistage packing seal structure, pass through sealing cover, Gland, stuffing box, the acting in conjunction of middle flange makes filler play good seal action, simultaneously, when after filler wearing and tearing, unclamp sealing cover and stuffing box, the scyewed joint of stuffing box and middle flange, can change the filler after wearing and tearing easily, the utility model makes the fluid flowing through valve after sealing configuration everywhere, pressure and leakage rate are in decrement states gradually, wait to arrive last place's sealing, its leakage rate will be decreased to zero, play the effect of positive confinement, meanwhile, by the improvement on sealing configuration, avoid workman and change the possibility damaging valve rod and filling surface when installing new filler.
Description
Technical field
The utility model relates to a kind of pipeline valve, is specifically related to a kind of pipeline valve valve rod leak-proof structure.
Background technique
Valve leakage out of steam system is a common phenomenon of pipeline valve, leaks outside and generally occurs in stuffing box place, and main cause is that valve rod is comparatively large to the wearing and tearing of filler, causes filler lost efficacy and produced leakage.Under normal circumstances, valve after dispatching from the factory all have passed through the test that leaks outside, valve there is no much problems, after using after a while, due to filler wearing and tearing, there is the filler just needing after leaking outside more to renew, even if but actual conditions have changed new stem packing can not tackle the problem at its root, it is few that main cause is that execute-in-place workman understands professional knowledge, the instrument such as screw-driver or awl is generally adopted to be taken out by force when changing filler, stuffing box internal surface or stem exterior surface is easy to scratch like this, destroy the sealing surface of stuffing box or valve rod, in this case again valve can only be changed, cause the loss that cannot retrieve, Given this, need to improve existing valve rod leak-proof structure.
Model utility content
The utility model is for the deficiency of above-mentioned technology and shortcoming, object there is provided a kind of valve rod sealing configuration of new structure, the possibility making it reduce to leak outside, and once after leaking outside, being convenient for changing filler, avoiding causing new man-made further destroy because changing the sealing surface of filler to valve rod and filler.
In order to realize final purpose of the present utility model, intend by the following technical solutions:
A kind of pipeline valve valve rod leak-proof structure, comprise valve body (1), valve rod (2), middle flange (5) and stuffing box packing (7), described middle flange (5) bottom, the position contacted with valve rod (2) is provided with O RunddichtringO (4), middle flange (5) top, the position contacted with valve rod (2) is filled with stuffing box packing (7), it is characterized in that: there is stuffing box (8) on described middle flange (5) top by scyewed joint, described stuffing box (8) lower end surface is pressed in the stuffing box packing (7) in middle flange (5) inner chamber, filler for subsequent use is filled with in the inner chamber of stuffing box (8) middle part, stuffing box (8) outside has been threaded connection sealing cover (11), Gland (10) is provided with between described sealing cover (11) and filler for subsequent use, Gland (10) lower end is pressed on filler for subsequent use.
Further, described stuffing box packing (7) is the one in engineering combined packing or flat ring group filler.
For increasing sealing effect, described O RunddichtringO (4) is at least 3, and equidistant from distance arranges.
For increasing sealing effect, described stuffing box packing (7) and filler for subsequent use are at least 4 layers.
Regulate described sealing cover (11) and stuffing box (8) threaded connection place to be provided with the Cock screw (9) of M8 specification for convenience, described middle flange (5) top and stuffing box (8) threaded connection place are provided with the Cock screw of below M6 specification.
The beneficial effects of the utility model are:
1. adopt multistage packing seal structure, because stuffing box packing and filler for subsequent use are all set to minimum four layers, during screwing hermetic lid, Gland, to the corresponding transmission step by step of the active force of filler, makes stuffing box packing and filler for subsequent use all play good seal action, flows through the fluid of valve after sealing configuration everywhere, pressure and leakage rate are in decrement states gradually, wait to arrive last place's sealing, namely during filler for subsequent use, its leakage rate will be decreased to zero.
2. flange and stuffing box in, all adopt between stuffing box with sealing cover and be threaded, after there are wearing and tearing in filler, outward winding after sealing cover and stuffing box can to replacement for subsequent use, can change stuffing box packing after turning on flange, thus avoid the outer surface of damaging valve stem and the generation of filler internal surface phenomenon when field worker adopts the instrument such as screw-driver or awl to take out filler by force, avoid the possibility causing new man-made further destroy because changing the sealing surface of filler to valve rod and filler.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, a kind of pipeline valve valve rod leak-proof structure, comprise valve body 1, valve rod 2, middle flange 5 and stuffing box packing 7, described middle flange 5 bottom, the position contacted with valve rod 2 is provided with O RunddichtringO 4, middle flange 5 top, the position contacted with valve rod 2 is filled with stuffing box packing 7, there is stuffing box 8 on middle flange 5 top by scyewed joint, described stuffing box 8 lower end surface is pressed in the stuffing box packing 7 in middle flange 5 inner chamber, filler for subsequent use is filled with in inner chamber in the middle part of stuffing box 8, stuffing box 8 outside has been threaded connection sealing cover 11, Gland 10 is provided with between described sealing cover 11 and filler for subsequent use, Gland 10 lower end is pressed on filler for subsequent use.
During the utility model assembling, first at middle flange 5 bottom press-in O RunddichtringO 4, by stud bolt 3 and nut 6, middle flange 5 is cemented on valve body 1 again, and then indentation sealing filler 7 successively, screw in stuffing box 8, be pressed into filler for subsequent use and Gland 10, finally screw in sealing cover 11 again, like this, the lower end surface of stuffing box 8 is pressed in the stuffing box packing 7 in middle flange 5 inner chamber, in stuffing box 8, filler for subsequent use is compressed by Gland 10, after assembling, as long as stuffing box packing 7 and filler for subsequent use can compress by rotary seal lid 11, stuffing box packing 7 and filler for subsequent use finally can be made to hold valve rod 2 tightly, play seal action.Because stuffing box packing 7 and filler for subsequent use are all set to minimum four layers, the active force of Gland 10 pairs of fillers can obtain corresponding transmission, makes stuffing box packing 7 and filler for subsequent use all play good seal action.Flow through the fluid of valve after sealing configuration everywhere, pressure and leakage rate are in decrement states gradually, and wait to arrive last place's sealing, namely during filler for subsequent use, its leakage rate will be decreased to zero.
In addition, after the assembling of this structure, also the method compressed respectively at different levels can be adopted, namely first stuffing box 8 is screwed in, after stuffing box 8 lower end press seal filler 7, lock the M6 Cock screw be arranged on flange 5, and then screwing hermetic lid 11, after making the Gland 10 being in sealing cover 11 lower end tightly push down filler for subsequent use, the M8 Cock screw 9 finally again on screwing hermetic lid 11.
When the phenomenon that leaks outside appears in stuffing box packing 7 wearing and tearing, when needing the stuffing box packing more renewed, unclamp the M8 Cock screw 9 being arranged in the outer outside M6 Cock screw of flange 5 and being positioned on sealing cover 11, to outward winding successively sealing cover 11 and stuffing box 8, turn on nut 6 again, stuffing box 8 and middle flange 5 can be taken off, can stuffing box packing easily 7 and filler for subsequent use change after taking off stuffing box 8 and middle flange 5, can not the outer surface of damaging valve stem 2, thus the phenomenon avoiding damage threshold rod outer surface and filler internal surface when field worker adopts the instrument such as screw-driver or awl to take out filler by force occurs, alleviate the maintenance intensity of workman, it also avoid the possibility causing unnecessary economic loss simultaneously.
Claims (5)
1. a pipeline valve valve rod leak-proof structure, comprise valve body (1), valve rod (2), middle flange (5) and stuffing box packing (7), described middle flange (5) bottom, the position contacted with valve rod (2) is provided with O RunddichtringO (4), middle flange (5) top, the position contacted with valve rod (2) is filled with stuffing box packing (7), it is characterized in that: there is stuffing box (8) on described middle flange (5) top by scyewed joint, described stuffing box (8) lower end surface is pressed in the stuffing box packing (7) in middle flange (5) inner chamber, filler for subsequent use is filled with in the inner chamber of stuffing box (8) middle part, stuffing box (8) outside has been threaded connection sealing cover (11), Gland (10) is provided with between described sealing cover (11) and filler for subsequent use, Gland (10) lower end is pressed on filler for subsequent use.
2. pipeline valve valve rod leak-proof structure according to claim 1, is characterized in that: described stuffing box packing (7) is the one in engineering combined packing or flat ring group filler.
3. pipeline valve valve rod leak-proof structure according to claim 1, is characterized in that: described O RunddichtringO (4) is at least 3, and equidistant from distance arranges.
4. pipeline valve valve rod leak-proof structure according to claim 1 and 2, is characterized in that: described stuffing box packing (7) and filler for subsequent use are at least 4 layers.
5. pipeline valve valve rod leak-proof structure according to claim 1, it is characterized in that: described sealing cover (11) and stuffing box (8) threaded connection place are provided with the Cock screw (9) of M8 specification, and described middle flange (5) top and stuffing box (8) threaded connection place are provided with the Cock screw of below M6 specification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420495992.5U CN204083483U (en) | 2014-09-01 | 2014-09-01 | A kind of pipeline valve valve rod leak-proof structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420495992.5U CN204083483U (en) | 2014-09-01 | 2014-09-01 | A kind of pipeline valve valve rod leak-proof structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204083483U true CN204083483U (en) | 2015-01-07 |
Family
ID=52176204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420495992.5U Active CN204083483U (en) | 2014-09-01 | 2014-09-01 | A kind of pipeline valve valve rod leak-proof structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204083483U (en) |
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2014
- 2014-09-01 CN CN201420495992.5U patent/CN204083483U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |