CN204628783U - The low leakage stuffing box structure of a kind of sand-proof type dynamic compensation - Google Patents
The low leakage stuffing box structure of a kind of sand-proof type dynamic compensation Download PDFInfo
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- CN204628783U CN204628783U CN201520263680.6U CN201520263680U CN204628783U CN 204628783 U CN204628783 U CN 204628783U CN 201520263680 U CN201520263680 U CN 201520263680U CN 204628783 U CN204628783 U CN 204628783U
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Abstract
The utility model patent relates to the low leakage stuffing box structure of a kind of sand-proof type dynamic compensation, mainly comprise letter body and hold-down grid, Packing seat, packing ring and filler spacer is placed with in described letter body, described packing ring is all provided with Packing seat up and down, upper end Packing seat is also provided with Gland, described filler spacer is installed in the middle of packing ring, forms double-deck stuffing box structure.Fixed by screw rod and nut between described letter body and hold-down grid, between nut and hold-down grid, be provided with butterfly spring.Described hold-down grid is set up a dust ring.The low leakage stuffing box structure of a kind of sand-proof type dynamic compensation that the utility model provides, good seal performance, adopts double-deck stuffing box structure; ensure that the sealing of filler; dust ring can effectively prevent dust storm particle from entering between valve rod and stuffing box, and protection valve rod, effectively can prevent dielectric leakage.This stuffing box structure structure is simple, novel in design, can realize the low leakage of medium, long service life.
Description
Technical field
The utility model patent relates to the low leakage stuffing box structure of a kind of sand-proof type dynamic compensation, belongs to industrial stokehold valve technology field.
Background technique
Modulating valve is the end fitting of industrial stokehold, and the top dynamic seal (packing) of most modulating valve relies on stuffing box to seal, and therefore the effect of stuffing box just seems particularly important.Because valve rod constantly moves back and forth, after long-play, filler is worn, form micro-gap with valve rod, medium is outside seepage likely, if generic media then causes the waste of resource, but, if the material that medium is poisonous, be harmful to, have nuclear radiation, once seepage will cause severe contamination to environment, will even jeopardize human life.
Common modulating valve stuffing box structure adopts individual layer sealing, does not have dynamic compensation structure, and long action can cause loosening of stuffing box gland nut, causes the leakage of stuffing box.Common stuffing box structure, dust storm particle is easy to enter between valve rod and filler, and especially in comparatively rugged environment, as desert region, travel fatigue is larger, and dust storm particle enters between valve rod and filler can cause pulling of valve rod, produces and leaks.
Model utility content
The purpose of this utility model is for above-mentioned technical problem, provides a kind of sand-proof type dynamic compensation low leakage stuffing box structure,
This stuffing box structure good seal performance, adopts double-deck stuffing box structure, ensure that the sealing of filler, effectively prevents dust storm particle from entering between valve rod and stuffing box, and protection valve rod, effectively can prevent dielectric leakage.
The low leakage stuffing box structure of a kind of sand-proof type dynamic compensation, mainly comprise letter body and hold-down grid, Packing seat, packing ring and filler spacer is placed with in described letter body, described packing ring is all provided with Packing seat up and down, upper end Packing seat is also provided with Gland, described filler spacer is installed in the middle of packing ring, forms double-deck stuffing box structure.Fixed by screw rod and nut between described letter body and hold-down grid, between nut and hold-down grid, be provided with butterfly spring.
Described filler spacer side is provided with oil hole, be built-in with screw plug, by dismounting screw plug, can regularly by oil hole toward oiling in stuffing box, be diverted in the middle of upper and lower two groups of fillers by filler spacer, in case filler is at high temperature dry, avoid the increase because of frictional force, the generation of valve rod stucking phenomena.Double-deck stuffing box structure ensure that the sealing of filler, and centre filler spacer separates, and increases overall sealing performance, reduces the possibility of leaking further, achieves the low leakage of medium.
Described hold-down grid is set up a dust ring, to prevent dust storm particle from entering between valve rod and stuffing box, valve rod and stuffing box are played a protective role, increase working life, in case dielectric leakage.
The setting of described butterfly spring can compensate by formative dynamics, makes stuffing box to be added with continual impacting force, sustainable use 5000 switch cycles operations, and does not need adjustment or change filler.
The filler fillers such as described Packing seat, packing ring according to the difference of operating mode medium, can select PTFE filler or graphite packing.
The low leakage stuffing box structure of a kind of sand-proof type dynamic compensation that the utility model provides, good seal performance, adopts double-deck stuffing box structure; ensure that the sealing of filler; dust ring can effectively prevent dust storm particle from entering between valve rod and stuffing box, and protection valve rod, effectively can prevent dielectric leakage.This stuffing box structure structure is simple, novel in design, can achieve the low leakage of medium, long service life.
Accompanying drawing explanation
Fig. 1: the schematic diagram of the low leakage stuffing box structure of a kind of sand-proof type of the utility model dynamic compensation;
In figure: 1, letter body, 2, hold-down grid, 3, Packing seat, 4, packing ring, 5, filler spacer, 6, Gland, 7, screw rod, 8, nut, 9, butterfly spring, 10, oil hole, 11, screw plug, 12, dust ring.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
As shown in Figure 1, the low leakage stuffing box structure of a kind of sand-proof type dynamic compensation, mainly comprise letter body 1 and hold-down grid 2, Packing seat 3, packing ring 4 and filler spacer 5 is placed with in described letter body 1, described packing ring about 4 is all provided with Packing seat 3, upper end Packing seat 3 is also provided with Gland 6, and described filler spacer 5 is installed in the middle of packing ring 4, forms double-deck stuffing box structure.Fixed by screw rod 7 and nut 8 between described and hold-down grid 2, butterfly spring 9 is provided with between nut 8 and hold-down grid 2, after upper jack panel 8, belleville spring 9 can provide continual impacting force to stuffing box, realize dynamic compensation, sustainable use 5000 switch cycles operations, and do not need adjustment or change filler.
Described filler spacer 5 side is provided with oil hole 10, be built-in with screw plug 11, by dismounting screw plug 11, can regularly pass through oil hole 10 toward oiling in stuffing box, be diverted in the middle of upper and lower two groups of fillers by filler spacer 5, in case filler is at high temperature dry, avoid the increase because of frictional force, the generation of valve rod stucking phenomena.Double-deck stuffing box structure ensure that the sealing of filler, increases overall sealing performance, reduces the possibility of leaking further.
Described hold-down grid 2 is set up a dust ring 12, to prevent dust storm particle from entering between valve rod and stuffing box, valve rod and stuffing box are played a protective role, increase working life, in case dielectric leakage.
Claims (4)
1. the low leakage stuffing box structure of sand-proof type dynamic compensation, it is characterized in that: mainly comprise letter body and hold-down grid, Packing seat, packing ring and filler spacer is placed with in described letter body, described packing ring is all provided with Packing seat up and down, upper end Packing seat is also provided with Gland, described filler spacer is installed in the middle of packing ring, forms double-deck stuffing box structure.
2. stuffing box structure according to claim 1, is characterized in that: fixed by screw rod and nut between described letter body and hold-down grid, be provided with butterfly spring between nut and hold-down grid.
3. stuffing box structure according to claim 1, is characterized in that: described filler spacer side is provided with oil hole, is built-in with screw plug.
4. stuffing box structure according to claim 1, is characterized in that: described hold-down grid is provided with dust ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520263680.6U CN204628783U (en) | 2015-04-28 | 2015-04-28 | The low leakage stuffing box structure of a kind of sand-proof type dynamic compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520263680.6U CN204628783U (en) | 2015-04-28 | 2015-04-28 | The low leakage stuffing box structure of a kind of sand-proof type dynamic compensation |
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| Publication Number | Publication Date |
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| CN204628783U true CN204628783U (en) | 2015-09-09 |
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| CN201520263680.6U Active CN204628783U (en) | 2015-04-28 | 2015-04-28 | The low leakage stuffing box structure of a kind of sand-proof type dynamic compensation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106704694A (en) * | 2017-02-08 | 2017-05-24 | 江苏神通阀门股份有限公司 | Maintenance-free stuffing box structure of valve |
| CN113670530A (en) * | 2021-08-25 | 2021-11-19 | 重庆川仪调节阀有限公司 | Method for detecting sealing performance of filler |
| CN114263746A (en) * | 2021-11-23 | 2022-04-01 | 中冶赛迪工程技术股份有限公司 | Contact type solid particle packing labyrinth seal structure |
-
2015
- 2015-04-28 CN CN201520263680.6U patent/CN204628783U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106704694A (en) * | 2017-02-08 | 2017-05-24 | 江苏神通阀门股份有限公司 | Maintenance-free stuffing box structure of valve |
| CN113670530A (en) * | 2021-08-25 | 2021-11-19 | 重庆川仪调节阀有限公司 | Method for detecting sealing performance of filler |
| CN113670530B (en) * | 2021-08-25 | 2024-03-12 | 重庆川仪调节阀有限公司 | Method for detecting sealing performance of filler |
| CN114263746A (en) * | 2021-11-23 | 2022-04-01 | 中冶赛迪工程技术股份有限公司 | Contact type solid particle packing labyrinth seal structure |
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