CN2146616Y - Flow-limiting double-seal auxiliary stopping valve - Google Patents
Flow-limiting double-seal auxiliary stopping valve Download PDFInfo
- Publication number
- CN2146616Y CN2146616Y CN 92221927 CN92221927U CN2146616Y CN 2146616 Y CN2146616 Y CN 2146616Y CN 92221927 CN92221927 CN 92221927 CN 92221927 U CN92221927 U CN 92221927U CN 2146616 Y CN2146616 Y CN 2146616Y
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- China
- Prior art keywords
- valve
- throttling
- seal
- spool
- nozzle
- 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 - Fee Related
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Abstract
The utility model provides a flow-limiting double-seal auxiliary throttling valve, mainly composed of a nozzle, a valve body, a valve rod, a valve core and a valve seat, wherein, the nozzle and the valve core are sleeved at an opening position to form a front and a rear two-stage throttlings; the valve core and the valve seat adopt a hard and a soft double seals. The throttling part and the sealing part are separated. The throttling ability is enhanced, the reliability of sealing the valve is enhanced, and the service life is increased. The utility model is especially suitable for high-pressure petroleum pipelines, a chemical pipelines, high-pressure petroleum devices, and a chemical device.
Description
The utility model belongs to the valve class, a kind of current limliting double seal assistant throttling stop valve.
Having the throttling stop valve that uses on pipeline or device now substantially all is needle value, the throttling position of this valve just in time is a sealing pair, when throttle, because pressure reduction is big, velocity of medium is high, sealing pair is gone through evil especially and is damaged easily because of washing away, especially when high-pressure low-flow more very.For this reason, have on pipe-line system and the commercial plant increase service valve so that emergency replacement at high pressure throttling position.
The purpose of this utility model is a kind of novel throttling stop valve of design, to overcome the defective of above-mentioned needle value, enables to be applicable to throttling, the emptying under the high pressure and ends, and is easy to operate, durable in use.
The purpose of this utility model reaches with following current limliting double seal assistant stop valve.It mainly is made up of nozzle, valve body, valve rod, spool, valve seat.Nozzle and nozzle cage are contained in valve body lower portion, peace handwheel lower end, valve rod upper end cartridge spool, valve core housing is positioned in the valve seat, pressure ring, steel ball are housed on the spool, at valve rod and valve cover chamber filler and Packing seat are housed, valve rod is connected with swivel nut with screw thread, and swivel nut is rack-mount and with the screw location, and spool pastes formation tightly mutually with the hard sealing pair inclined-plane of valve seat and seals firmly; Between valve gap and valve core housing, be to adopt the seal ring soft seal between valve gap and the valve body and on valve seat; For guaranteeing the sealing of valve rod place, the oil gun of filling seal gease is housed on valve gap.Structure like this makes this valve have following characteristics: 1. double-action-throttling and sealing, and 2. double-sealing-hard sealing and soft sealing, 3. the throttling of front and back level binodal stream-prime is a nozzle, a back level throttling is the valve core housing tapping.
Fig. 1 is the utility model structural representation and summary figure.
Fig. 2 is the working principle schematic representation.
Fig. 3 is throttling seam schematic representation.
1. lower cover, 2.O type circle, 3. valve body, 4. valve seat, 5. spool, 6. valve core housing, 7. steel ball, 8. pressure ring, 9. oil gun, 10. valve gap, 11. supports, 12. swivel nut, 13. handwheels, 14. positioning screwns, 15. seal pressure cap, 16. packing press rings, 17. fillers, Packing seat, 18. valve rod, 19. nozzle cages, 20. throttlings seam.
Accompanying drawing also is the utility model embodiment, seal ring O type circle.Below in conjunction with accompanying drawing working principle of the present utility model is further specified.
One. closed condition.This moment, spool 5 was in the C position of Fig. 2, and the hard sealing pair inclined-plane of spool is pressed on the hard sealing pair inclined-plane of valve seat 4, formed the hard sealing; Simultaneously, O type circle 2 is close on the spool cylndrical surface, forms soft sealing, and like this two seals has improved the sealability of valve.
Two. the throttling attitude.This moment, spool was in the B position of Fig. 2, and fluid is at first entered the inner chamber of valve seat 4 after the nozzle throttling on the nozzle cage 18, the throttling seam discharge that forms of the cylndrical surface of the perforate position by valve core housing 6 and spool end again.In the throttling process, most pressure is added on the nozzle, and little part is added in throttling and sews on, and high-velocity fluid is much serious to nozzle abrasion comparison throttling seam, and hard and soft sealing have all been avoided directly washing away.As long as and the nozzle cage of wearing and tearing is opened lower cover and just can be changed easily.
Three. full-gear.This moment, spool was in the A position, valve opening maximum, the suffered drag losses minimum of fluid.
The utility model has the advantage of because of the perforate position two-stage of throttling position by nozzle and valve core housing and form, the hard sealing that its sealing employing spool and valve seat form and sealing ring are to the soft sealing of spool, thereby sealing is reliable, both improved throttling capacity, avoid again the direct erosive wear of high speed and high pressure fluid to hard and soft sealing, prolonged service life.
Claims (2)
1, current limliting double seal assistant throttling stop valve is made up of nozzle, valve body, valve rod, spool, valve core housing and valve seat, it is characterized in that:
1) the throttling position forms forward and backward two-stage throttling at nozzle and valve core housing tapping;
2) adopt hard soft double seal on spool and the valve seat, seal firmly to be pressed on the hard sealing pair of the valve seat inclined-plane and form by the hard sealing pair of spool inclined-plane; Soft seal is close on the spool cylndrical surface by seal ring and forms.
2, current limliting double seal assistant throttling stop valve as claimed in claim 1 is characterized in that between valve gap and the valve body and employing seal ring soft seal on valve seat.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 92221927 CN2146616Y (en) | 1992-12-16 | 1992-12-16 | Flow-limiting double-seal auxiliary stopping valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 92221927 CN2146616Y (en) | 1992-12-16 | 1992-12-16 | Flow-limiting double-seal auxiliary stopping valve |
Publications (1)
Publication Number | Publication Date |
---|---|
CN2146616Y true CN2146616Y (en) | 1993-11-17 |
Family
ID=33768628
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN 92221927 Expired - Fee Related CN2146616Y (en) | 1992-12-16 | 1992-12-16 | Flow-limiting double-seal auxiliary stopping valve |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN2146616Y (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102828803A (en) * | 2012-08-30 | 2012-12-19 | 无锡市凯龙汽车设备制造有限公司 | Sealing structure for rubber plate of metering nozzle |
CN103591302A (en) * | 2012-10-23 | 2014-02-19 | 北京熊川阀门制造有限公司 | Sealing structure of needle-shaped stop valve |
CN103939624A (en) * | 2014-05-09 | 2014-07-23 | 杭州华惠阀门有限公司 | Reducing valve |
CN104896109A (en) * | 2015-05-29 | 2015-09-09 | 杭州华惠阀门有限公司 | Pressure reducing valve |
-
1992
- 1992-12-16 CN CN 92221927 patent/CN2146616Y/en not_active Expired - Fee Related
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102828803A (en) * | 2012-08-30 | 2012-12-19 | 无锡市凯龙汽车设备制造有限公司 | Sealing structure for rubber plate of metering nozzle |
CN102828803B (en) * | 2012-08-30 | 2015-09-16 | 凯龙高科技股份有限公司 | A kind of measuring jet offset plate sealing configuration |
CN103591302A (en) * | 2012-10-23 | 2014-02-19 | 北京熊川阀门制造有限公司 | Sealing structure of needle-shaped stop valve |
CN103591302B (en) * | 2012-10-23 | 2015-11-04 | 北京熊川阀门制造有限公司 | A kind of sealing configuration of needle stop valve |
CN103939624A (en) * | 2014-05-09 | 2014-07-23 | 杭州华惠阀门有限公司 | Reducing valve |
CN104896109A (en) * | 2015-05-29 | 2015-09-09 | 杭州华惠阀门有限公司 | Pressure reducing valve |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
C19 | Lapse of patent right due to non-payment of the annual fee | ||
CF01 | Termination of patent right due to non-payment of annual fee |