CN204328185U - Valve built-in fat alternately multi-sealed stuffing box structure - Google Patents
Valve built-in fat alternately multi-sealed stuffing box structure Download PDFInfo
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- CN204328185U CN204328185U CN201420714681.3U CN201420714681U CN204328185U CN 204328185 U CN204328185 U CN 204328185U CN 201420714681 U CN201420714681 U CN 201420714681U CN 204328185 U CN204328185 U CN 204328185U
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- ring
- underfilling
- valve
- fat
- stuffing box
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Abstract
The utility model proposes a kind of being particularly suitable for and be fitted to existing valve series products the carries out upper sealing built-in fat of valve alternately multi-sealed stuffing box structure to valve rod, it is primarily of the underfilling ring of composition " V " shape structure press-fited in packing cavity, middle filler ring, upper strata packing ring and " O " shape seal ring composition alternately multiple Multi-level sealing structure being flush-mounted in underfilling ring, the depot fat ring cavity being also provided with large trapped fuel space at underfilling ring inwall forms " built-in fat " seal lubrication structure to valve rod, can guarantee that valve has good seal lubrication effect in use overall process without the need to outer injection allocation oil nozzle.Cast off the traditional structural design of the outer injection allocation oil nozzle of existing valve series products once and for all, significantly reduce manufacture cost, eliminate the tedious operations of the outer grease injection of timing, the utility model proposes stuffing box structure and have that structure is simple and direct, bearing capacity is high, sealability is strong, the outstanding advantages of security of operation No leakage and long service life, have good application prospect.
Description
Technical field
The utility model relates to valve series products, particularly relate to valve rod upper sealing device, specifically a kind of valve built-in fat alternately multi-sealed stuffing box structure, it is the useful Improvement and perfection carried out existing valve series products sealing configuration, can effectively improve valve stem seal performance, to raising valve series products pressure-bearing grade, there is positive effect.
Background technique
With regard to existing valve series products, stuffing box (being Stuffing box again) is positioned at the seal arrangement that valve rod and bonnet position be used as to stop gas or liquid medium to leak, and the filler that it press-fits primarily of packing press ring, gland forms.The sealability of stuffing box directly affects valve series products pressure-bearing grade and the normal principal element worked working life.When valve carries out keying operation, be generally adopt electronic or manually-operable rotation valve rod and make its upper and lower displacement, can with movable valve plug open valve mouth or close port or the aperture regulating valve port.All that the rotation displacement relying on valve rod carries out to the keying of valve and Flow-rate adjustment operation, that is to say, valve rod is a very important moving element in the product structure of valve, technical functionality both requiring, valve rod has rotating property flexibly, had required again, to valve rod, there is tight sealability.Valve is in running: its sealability to be sealed valve rod by the filler of stuffing box to realize, and the flexible performance of rotation of valve rod is then add grease injection by the pump nozzle being fitted to valve outer surface to stuffing box timing to lubricate and maintain.But, we find in the R&D work of long campaigns valve series products: valve rod is larger to the wear damage of filler in rotation displacement process, the sealability of stuffing box can be made after filler weares and teares to decline fast and then cause dielectric leakage accident, whole valve also can be caused time serious to close medium and lost efficacy and scrap, this just existing valve series products there is a principal element of " pressure-bearing lower grade, normal working life is shorter " technological deficiency.Trace it to its cause be due to existing stuffing box also scientific and reasonable not to the utmost in structural design caused by: conventional filler shape is multiple plate folded distribution structure and adopts outer injection allocation oil nozzle to inject grease at regular intervals to lubricate, due to this plate filler, in use self-deformation is little, adaptive sealability is poor, its use pressure rating is generally at below 32Mpa, outer injection allocation oil nozzle structure design also can increase manufacturing cost, and the operation that timing adds grease injection also comparatively bothers, if operator forget add grease injection or due to pump nozzle blocking cannot add grease injection time, filler wear out failure will be aggravated.This just existing valve stuffing box structure also require further improvement and perfect technical problem.
Model utility content
The purpose of this utility model is intended to overcome prior art above shortcomings part and proposes the built-in fat of a kind of valve alternately multi-sealed stuffing box structure, it has high pressure bearing and seal performance and opens and closes operating flexibility, valve safe operation operation steadily in the long term under high-grade gas Jie pressure working condition can be made, have obvious technique effect to the operating life extending valve series products.
The purpose of this utility model is achieved by the following technical solution:
A kind of valve that the utility model proposes built-in fat alternately multi-sealed stuffing box structure, it comprises underfilling ring, middle filler ring and upper strata packing ring, described underfilling ring, middle filler ring and upper strata packing ring press-fit in the packing cavity of bonnet by packing press ring, it is characterized in that: the inwall of underfilling ring is provided with the depot fat ring cavity that note fills out seal grease built-in fat seal lubrication structure is formed to valve rod, interior seal groove is set bottom the inwall of underfilling ring, at the outer wall of underfilling ring, external sealed groove is set, at interior seal groove, in external sealed groove, setting-in " O " shape seal ring is to valve rod, bonnet forms inside and outside alternately multi-sealing structure.Its remarkable structural feature is: fold successively in packing cavity and join one group of underfilling ring, middle filler ring, upper strata packing ring and inside and outside underfilling ring wall setting-in " O " shape seal ring valve rod and bonnet are formed to the sealing configuration of " alternately multiple " simultaneously, the depot fat ring cavity being also provided with larger trapped fuel space at underfilling ring inwall forms the seal lubrication structure of " built-in fat " to valve rod, it is without the need to special outer injection allocation oil nozzle, just disposablely when the assembling of valve series products is dispatched from the factory fill seal grease, can guarantee that valve series products all has good " built-in fat " seal lubrication effect to valve rod in work overall process, shows through on probation: it can make valve running job steadily in the long term under 70Mpa high level of pressure operating mode, there is high pressure bearing and seal performance and flexible operation performance.
For realizing the technical solution of the utility model better, it also has following technical characteristics:
The ring body section of middle filler ring is for falling " V " shape structure, and " V " shape structure suitable with middle filler ring is arranged in the upper-end surface of underfilling ring, the lower end surface of upper strata packing ring.The design of this " V " shape filling-material structure is compared with traditional plate filler, the filler of " V " shape structure press-fits at lamination and runs to use in working procedure and all has good " deformation adaptive ability ", and unique " the deformation adaptive ability " of this " V " filler has certain effect to the pressure bearing and seal performance improving stuffing box.
One group of middle filler ring is fitted between underfilling ring and upper strata packing ring by stacked system to form one " sealing unit ", in the packing cavity of bonnet, be 2-3 by the quantity of " sealing unit " of stacked system successively equipped underfilling ring, one group of middle filler ring, upper strata packing ring composition.This structural design " organizing sealing unit by stacked system is equipped successively " in packing cavity can form the technique effect of " multi-stage sealed " more to valve rod, it all has positive effect to the pressure-bearing grade and then prolongation valve series products operating life that improve stuffing box further.
Described " sealing unit " is by a underfilling ring, a upper strata packing ring and form by 2-5 middle filler rings that stacked system is fitted between underfilling ring, upper strata packing ring.This structural design also can form the technique effect of " multi-stage sealed " to valve rod, also have certain effect in actual use to the sealability improving stuffing box.
The utility model compared with the existing technology has following outstanding advantage:
The utility model has initiated underfilling ring, middle filler ring, upper strata packing ring formation " organizing sealing unit " folding successively in packing cavity and join one group of " V " shape structure more, inside and outside underfilling ring, wall setting-in " O " shape seal ring forms " alternately multiple " sealing configuration to valve rod and bonnet, meanwhile, the depot fat ring cavity with larger trapped fuel space is also set at underfilling ring inwall and forms " built-in fat " seal lubrication structure.It has casted off existing valve series products is equipped with pump nozzle outward traditional structural design at valve body once and for all, only need can guarantee that valve series products has good " built-in fat " seal lubrication effect in use overall process by the disposable seal grease that fills when dispatching from the factory, effectively optimize the production technology process of valve series products and then reduce manufacture cost, meanwhile, the tedious operations also eliminating timing filling seal grease is run in using process at valve series products.Show through on probation: the stuffing box structure that the utility model proposes has high pressure bearing and seal performance and flexible operation performance really, it can make valve safe operation operation steadily in the long term under 70Mpa high pressure level gas Jie operating mode, have that structure is simple and direct, bearing capacity is high, sealability is strong, the outstanding advantages of No leakage safe and reliable to operation and long service life, be specially adapted to equipped in High Pressure Gas Transmitting Pipeline use.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model, and also make an abstract accompanying drawing.
Fig. 2 is Fig. 1
ipartial enlarged drawing, by the structural representation of stacked system successively equipped underfilling ring, one group of middle filler ring, upper strata packing ring composition " sealing unit " in the packing cavity being illustrated in bonnet.
Fig. 3 is the structural representation (amplification) of underfilling ring, and the inside and outside wall being illustrated in underfilling ring arranges the structural representation of depot fat ring cavity, interior seal groove, external sealed groove.
Description of symbols in accompanying drawing:
1 is handwheel, and 2 is packing press ring, and 3 is valve rod, and 4 is bonnet, and 5 is seal grease, and 6 is " O " shape seal ring, and 7 is underfilling ring, and 8 is upper strata packing ring, and 9 is middle filler ring, and 10 is depot fat ring cavity, and 11 is external sealed groove, and 12 is interior seal groove.
Embodiment
Embodiment of the present utility model is further described below in conjunction with accompanying drawing:
A kind of valve built-in fat alternately multi-sealed stuffing box structure, one group of underfilling ring 7 that it press-fits in valve bonnet 4 packing cavity primarily of packing press ring 2, middle filler ring 9, upper strata packing ring 8 is formed, the ring body section of described middle filler ring 9 is for falling " V " shape structure, the upper-end surface of underfilling ring 7, the lower end surface of upper strata packing ring 8 is arranged respectively to " V " shape structure suitable with middle filler ring 9, a underfilling ring 7 is pressed stacked system equipped one group of middle filler ring 9 successively, a upper strata packing ring 8 forms one " sealing unit ", interior seal groove 12 is respectively arranged with outer wall bottom the inwall of underfilling ring 7, external sealed groove 11, at interior seal groove 12, setting-in " O " shape seal ring 6 pairs of valve rods 3 in external sealed groove 11, bonnet 4 forms the sealing configuration of inside and outside " alternately multiple " simultaneously, also be provided with at the inwall of underfilling ring 7 depot fat ring cavity 10 pairs of valve rods 3 that note fills out seal grease 5 and form " built-in fat " seal lubrication structure.It carries out stuffing box assembly operation as follows: in the depot fat ring cavity 10 of underfilling ring 7 disposable fill seal grease 5 and in interior seal groove 12, external sealed groove 11 setting-in " O " shape seal ring 6, " O " shape seal ring 6 will be embedded with, fill a underfilling ring 7 of seal grease 5 and first put into bonnet 4 packing cavity, press stacked system equipped four middle filler rings 9 and a upper strata packing ring 8 successively again, finally tighten packing press ring 2 and carry out press-fiting and can form one " sealing unit ".In like manner, according to the production Technology requirement of all kinds of valve series products, according to above-mentioned assembly operation mode, two or three " sealing unit " can be assembled successively by stacked system again in the packing cavity of bonnet 4, finally tighten packing press ring 2 to carry out press-fiting and can form " multiunit multi-stage sealed " structure to valve rod 3, in actual use, this " multiunit multi-stage sealed " structure has positive effect to the operating life improving stuffing box pressure-bearing grade and then prolongation valve further.In actual production manufacturing process, above-mentioned underfilling ring 7, middle filler ring 9 and upper strata packing ring 8 can select teflon or flexible graphite material to make, and " O " shape seal ring 6 can select fluorine rubber material to make.When operating handwheel 1 and making valve rod 3 rotate also upper and lower displacement, the spool being positioned at valve pocket can be driven to carry out unlatching valve port or close port or regulate the operations such as valve port opening regulation and control rate-of flow.Valve runs in overall process in work, and the seal grease 5 be poured in depot fat ring cavity 10 all can carry out effective lubrication to valve rod 3.It should be noted that: the utility model is the depot fat ring cavity 10 arranging a large trapped fuel space at underfilling ring 7 inwall, only disposablely when dispatching from the factory need fill seal grease 5 in depot fat ring cavity 10, no longer adding grease in the course of the work is all enough to guarantee that valve series products is using the technical requirements in overall process with good " built-in fat " seal lubrication.The utility model has casted off existing valve series products is equipped with pump nozzle outward traditional structural design at valve body once and for all, optimize valve series products production technology, greatly can reduce manufacture cost, also eliminate at the tedious operations running timing outer note seal grease in using process simultaneously.
The utility model proposes stuffing box structure assembling use on valve series products, show through the on probation of long period: it has high pressure bearing and seal performance and greasy property really, valve safe and stable operation operation under 70Mpa high pressure level gas Jie operating mode can be made, have that structure is simple and direct, bearing capacity is high, sealability is strong, the outstanding advantages of No leakage safe and reliable to operation and long service life, be specially adapted to equipped in High Pressure Gas Transmitting Pipeline use.
Claims (4)
1. a valve built-in fat alternately multi-sealed stuffing box structure, it comprises underfilling ring (7), middle filler ring (9) and upper strata packing ring (8), described underfilling ring (7), middle filler ring (9) and upper strata packing ring (8) press-fit in the packing cavity of bonnet (4) by packing press ring (2), it is characterized in that: the inwall of underfilling ring (7) is provided with the depot fat ring cavity (10) that note fills out seal grease (5) built-in fat seal lubrication structure is formed to valve rod (3), interior seal groove (12) is set bottom the inwall of underfilling ring (7), at the outer wall of underfilling ring (7), external sealed groove (11) is set, in interior seal groove (12), external sealed groove (11) interior setting-in " O " shape seal ring (6) is to valve rod (3), bonnet (4) forms inside and outside alternately multi-sealing structure.
2. valve according to claim 1 built-in fat alternately multi-sealed stuffing box structure, it is characterized in that: the ring body section of middle filler ring (9) is for falling " V " shape structure, and " V " shape structure suitable with middle filler ring (9) is arranged in the upper-end surface of underfilling ring (7), the lower end surface of upper strata packing ring (8).
3. valve according to claim 1 and 2 built-in fat alternately multi-sealed stuffing box structure, it is characterized in that: one group of middle filler ring (9) is fitted between underfilling ring (7) and upper strata packing ring (8) by stacked system to form one " sealing unit ", the quantity of " sealing unit " that form by stacked system successively equipped underfilling ring (7), one group of middle filler ring (9), upper strata packing ring (8) in the packing cavity of bonnet (4) is 2-3.
4. valve according to claim 3 built-in fat alternately multi-sealed stuffing box structure, is characterized in that: described " sealing unit " is by a underfilling ring (7), a upper strata packing ring (8) and form by 2-5 middle filler rings (9) that stacked system is fitted between underfilling ring (7), upper strata packing ring (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420714681.3U CN204328185U (en) | 2014-11-25 | 2014-11-25 | Valve built-in fat alternately multi-sealed stuffing box structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420714681.3U CN204328185U (en) | 2014-11-25 | 2014-11-25 | Valve built-in fat alternately multi-sealed stuffing box structure |
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| CN204328185U true CN204328185U (en) | 2015-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420714681.3U Active CN204328185U (en) | 2014-11-25 | 2014-11-25 | Valve built-in fat alternately multi-sealed stuffing box structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110195783A (en) * | 2019-06-04 | 2019-09-03 | 四川长仪油气集输设备股份有限公司 | Piston valve core pressure self-balancing cut-off throttle valve |
-
2014
- 2014-11-25 CN CN201420714681.3U patent/CN204328185U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110195783A (en) * | 2019-06-04 | 2019-09-03 | 四川长仪油气集输设备股份有限公司 | Piston valve core pressure self-balancing cut-off throttle valve |
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