CN202280885U - Lift check valve - Google Patents
Lift check valve Download PDFInfo
- Publication number
- CN202280885U CN202280885U CN2011203854142U CN201120385414U CN202280885U CN 202280885 U CN202280885 U CN 202280885U CN 2011203854142 U CN2011203854142 U CN 2011203854142U CN 201120385414 U CN201120385414 U CN 201120385414U CN 202280885 U CN202280885 U CN 202280885U
- Authority
- CN
- China
- Prior art keywords
- valve
- check valve
- flap
- lift check
- guide sleeve
- 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 discloses a valve and particularly relates to a lift check valve. The lift check valve comprises a valve body, a valve seat, a valve seat, a valve clack, a covering piece, a bolt, a nut and a rotating shaft, wherein the valve clack and the rotating shaft are oval. An anti-impact spring is arranged between the upper end face of the valve clack and a guide sleeve, the upper end face of the anti-impact spring is contacted with the guide sleeve, and when the lower end face of the anti-impact spring is contacted with the valve clack, an idle stroke has an undeformed length of the valve clack (namely a design length). The lift check valve has the advantages of being capable of effectively prolonging service life, not needing replacement caused by the fact that some component of the check valve is damaged, being free of noise in the using process and wide in using range and the like. The lift check valve has wide purposes.
Description
Technical field
The utility model relates to a kind of valve, specifically is meant a kind of safety check of rise-fall type.
Technical background
Lift check valve is meant and relies on medium itself to flow and automatic open and close flap, is used for preventing the valve that medium flows backwards, and claims check valve, one-way valve, reflux valve and back pressure valve again, in industry, uses in a large number at present.Safety check belongs to a kind of automatic valve, and it mainly acts on is to prevent that medium from flowing backwards, preventing pump and drive motor, compressor, steam turbine counter-rotating, and the releasing of vessel media.
The flap of Lift check valve is located in and is positioned on the valve body upper valve base sealing surface.This valve is except flap can freely go up and down, and remaining part is the same as stop valve, and hydrodynamic pressure makes flap lift from sealing surface of seat, and medium back flow causes flap to fall back on the valve seat, and cuts off mobile.
When medium flowed by prescribed direction, flap received the effect of medium power, is unlocked; During medium counter flow,, make the sealing surface driving fit of flap and valve seat and close, reach the purpose of prevention medium counter flow because of flap deadweight and flap receive the effect of medium opposite force.
At present the flap of Lift check valve is in the form of annular discs, rotates around the rotating shaft of valve base channel, causes the rotating shaft wearing and tearing easily, even rubs, and flap stops up valve or sound, vibrations strengthen, and seriously causes working environment to worsen.
The model utility content
The utility model has proposed a kind of scheme that effectively reduces wear, reduces noise to deficiency of the prior art.
The utility model is achieved through following technical proposals:
A kind of Lift check valve comprises valve body, valve seat, flap, covers part, bolt, nut, rotating shaft, it is characterized in that:
Flap, rotating shaft all are oval; Adopt oval the cooperation, to prevent rotation, ellipse is processed in rotating shaft, and guide sleeve also is processed into ellipse, prevent rotating shaft in guide sleeve high speed rotating to reduce wear;
A protecting against shock spring is arranged between flap upper-end surface and the guide sleeve, and this moment, the passage of safety check should be able to be through the peak rate of flow of compressor or pump, and spring only plays buffer function like this, guarantees the zero load startup of machinery equipment.
As preferably, protecting against shock spring upper-end surface contacts with guide sleeve in the above-mentioned Lift check valve, and the idle running when protecting against shock spring lower end surface contacts with flap is the undeformed length of protecting against shock spring (design length).
As preferably, valve body and cover and place pad between the part in the above-mentioned Lift check valve can effectively seal, strengthen solidness etc.
The present invention is a kind of improvement to Lift check valve, is a kind of new-type Lift check valve, has changed the working principle of former Lift check valve.The flap of former Lift check valve is in the form of annular discs, rotates around the rotating shaft of valve base channel, because of valve internal channel streamlining; Flow resistance is than to rise butterfly check valve little; Be applicable to low flow velocity and the heavy caliber occasion that flows and seldom change, but should not be used for pulsed flow, its sealability is not as good as rise-fall type.The flap ovalize of the safety check in the utility model; No longer the rotating shaft around valve base channel rotates, and because of valve internal channel streamlining, flow resistance is bigger than rising butterfly check valve; Be not only applicable to low flow velocity and the heavy caliber occasion that flows and seldom change, be specially adapted to the occasion of pulsed flow.
Former Lift check valve is used in air, gas compressor etc., because gas produces pulsed flow outer pipe strenuous vibration, produces strong noise.Its reason is that safety check flap play causes; Safety check is a Lift check valve; Because air compressor, gas compressor are that steam turbine drags; The fluctuation of steam inlet pressure, back pressure outlet vapor pressure, air pressure etc. all can cause the fluctuation of turbine speed, thereby causes the variation of compressor air outlet pressure and tolerance.The safety check flap frequently clashes into valve gap and loud noise takes place, and causes pipe vibration, and safety check is very short working life, has only through constantly changing safety check and solves hidden danger.Even if like this, rotating shaft is still interrupted, and flap is blown to the storage tank import and blocks valve, and the steam turbine coupling is twisted off.
Valve is disintegrated, analyzes: because turbine speed fluctuation causes the variation of air compressor rate of discharge and pressure, thereby cause the rotation of flap rotating shaft, string is moving is up and down caused.
Beneficial effect: the utility model can effectively improve the working life of safety check, can not need because of a certain parts damages of safety check to change, and in use noise can not occur, and using scope is wider etc.
Description of drawings
The sectional structure schematic representation of Fig. 1 the utility model
1, valve body 2, valve seat 3, flap 4, protecting against shock spring 5, guide sleeve
6, pad 7, cover part 8, nut 9, bolt 10, rotating shaft
Embodiment
Below in conjunction with accompanying drawing, the enforcement of the utility model is specified:
According to structure shown in Figure 1, prepare a Lift check valve, comprise valve body 1, valve seat 2, flap 3, guide sleeve 5, cover part 7, bolt 9, nut 8, rotating shaft 10, wherein: flap 3, rotating shaft 10 all are oval; A protecting against shock spring 4 is arranged between flap 3 upper-end surfaces and the guide sleeve 5; Protecting against shock spring 4 upper-end surfaces contact with guide sleeve 5, and the idle running when protecting against shock spring 4 lower end surfaces contact with flap 3 is protecting against shock spring 4 undeformed length.At valve body 1 and cover between the part 7 and to place pad 6, enhanced leaktightness; Guide sleeve 5 is oval, and the effective cooperation between flap 3, rotating shaft 10 and the guide sleeve 5, guarantees that flap 3 can arbitrarily not rotate.When flap 3 receives fluid impact and opens, because flap 3 grades are shaped as ellipse, thus can be in valve body 2 inner rotations, owing to installed protecting against shock spring 4 additional, so though flap 3 receives the moment fluid impact, strong collision can not take place still; On the contrary, when non-return, also receive the effect of protecting against shock spring 4, and steadily sealing.
Claims (4)
1. a Lift check valve comprises valve body (1), valve seat (2), flap (3), guide sleeve (5), covers part (7), bolt (9), nut (8), rotating shaft (10), it is characterized in that:
Flap (3), rotating shaft (10) all are oval;
Between flap (3) upper-end surface and the guide sleeve (5) a protecting against shock spring (4) is arranged.
2. a kind of Lift check valve according to claim 1 is characterized in that protecting against shock spring (4) upper-end surface contacts with guide sleeve (5), and protecting against shock spring (4) lower end surface is the undeformed length of protecting against shock spring (4) with the idle running of flap (3) when contacting.
3. a kind of Lift check valve according to claim 1 is characterized in that valve body (1) and covers placing pad (6) between the part (7).
4. a kind of Lift check valve according to claim 1 is characterized in that guide sleeve (5) is for oval.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203854142U CN202280885U (en) | 2011-10-11 | 2011-10-11 | Lift check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203854142U CN202280885U (en) | 2011-10-11 | 2011-10-11 | Lift check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202280885U true CN202280885U (en) | 2012-06-20 |
Family
ID=46227054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203854142U Expired - Lifetime CN202280885U (en) | 2011-10-11 | 2011-10-11 | Lift check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202280885U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104675474A (en) * | 2012-06-29 | 2015-06-03 | 常州科普动力机械有限公司 | Diesel engine lubricating oil way pumping oil and lubricating rapidly |
| CN104675475A (en) * | 2012-06-29 | 2015-06-03 | 常州科普动力机械有限公司 | Lubricating oil circuit for quickly lubricating diesel engine and method for operating lubricating oil circuit |
| JP2019100489A (en) * | 2017-12-06 | 2019-06-24 | 株式会社タブチ | Check valve |
| CN110260002A (en) * | 2019-08-01 | 2019-09-20 | 韩国昊 | Check-valves |
| CN110345284A (en) * | 2019-07-26 | 2019-10-18 | 黄洪刚 | A kind of check-valves |
| CN112145760A (en) * | 2020-09-01 | 2020-12-29 | 济南德创试验仪器有限公司 | Check valve |
| CN113915382A (en) * | 2020-07-08 | 2022-01-11 | 克诺尔车辆设备(苏州)有限公司 | Improved check valve for rail transit vehicles and method of manufacture |
-
2011
- 2011-10-11 CN CN2011203854142U patent/CN202280885U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104675474A (en) * | 2012-06-29 | 2015-06-03 | 常州科普动力机械有限公司 | Diesel engine lubricating oil way pumping oil and lubricating rapidly |
| CN104675475A (en) * | 2012-06-29 | 2015-06-03 | 常州科普动力机械有限公司 | Lubricating oil circuit for quickly lubricating diesel engine and method for operating lubricating oil circuit |
| JP2019100489A (en) * | 2017-12-06 | 2019-06-24 | 株式会社タブチ | Check valve |
| JP7054509B2 (en) | 2017-12-06 | 2022-04-14 | 株式会社タブチ | Check valve |
| CN110345284A (en) * | 2019-07-26 | 2019-10-18 | 黄洪刚 | A kind of check-valves |
| CN110345284B (en) * | 2019-07-26 | 2020-07-28 | 江苏海达船用阀业有限公司 | Check valve |
| CN110260002A (en) * | 2019-08-01 | 2019-09-20 | 韩国昊 | Check-valves |
| CN113915382A (en) * | 2020-07-08 | 2022-01-11 | 克诺尔车辆设备(苏州)有限公司 | Improved check valve for rail transit vehicles and method of manufacture |
| CN112145760A (en) * | 2020-09-01 | 2020-12-29 | 济南德创试验仪器有限公司 | Check valve |
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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 |
Granted publication date: 20120620 |
|
| CX01 | Expiry of patent term |