CN2036233U - Lever-type gravity-balanced check valve - Google Patents
Lever-type gravity-balanced check valve Download PDFInfo
- Publication number
- CN2036233U CN2036233U CN 88202594 CN88202594U CN2036233U CN 2036233 U CN2036233 U CN 2036233U CN 88202594 CN88202594 CN 88202594 CN 88202594 U CN88202594 U CN 88202594U CN 2036233 U CN2036233 U CN 2036233U
- Authority
- CN
- China
- Prior art keywords
- valve
- flap
- way valve
- lever
- check valve
- 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.)
- Withdrawn
Links
Images
Landscapes
- Check Valves (AREA)
- Lift Valve (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The utility model discloses a lever-type gravity-balanced check valve, which is a check valve with a gravity-balanced mechanism. The pressing force of the valve flap can be adjusted according to the need. The lever-type gravity-balanced check valve has small positive draft resistance force; the reverse closing motion is sensitive and quick; the check performance is good; the sealing is tight and reliable. The lever-type gravity-balanced check valve can be widely used for one-way conveying the low-pressure gas; in particular for conveying the combustible, explosive and inflammable gas, the lever-type gravity-balanced check valve has the function of safe check.
Description
The present invention is a kind of one-way valve of adjusting the flap impacting force with the gravitational equilibrium lever.
Used one-way valve is divided into rise-fall type, rotary-open type and butterfly usually at present.When the gas forward when these one-way valves, must overcome the gravity of flap or the pressure of spring, when having only pressure when gas greater than above-mentioned gravity or pressure, valve could be opened, otherwise gas can not pass through.This has brought difficulty with regard to the conveying of giving low-pressure gas.Behind the valve opening, the flap plane is parallel with the fluid motion direction, when producing backflow phenomenon for a certain reason in the gas circuit, can not close rapidly, influences the cut-out of reflux gas.And flap and sealed mouth are plane contact, and be poorly sealed, sews easily.Yet closing volume gas passageway and sealing are strict in time, and be most important for inflammable and explosive inflammable gas.
Also have now and adopt liquid seal device to prevent gas backstreaming, as adopting water seal arrangement.But the loss of pressure head of this device is still bigger, simultaneously also can increase airflow humidity or bring other impurity into, thereby may reduce gas purity on the one hand, in air delivering pipeline, separate out moisture content on the other hand, may form water blocking and occur the phenomenon of freezing in the winter time, influence gas delivery.This is inapplicable under many circumstances.
The present invention is exactly in order to solve existing existing the problems referred to above of one-way valve, through conscientiously research, to have proposed design of the present invention.
The objective of the invention is in order to provide a kind of forward little by resistance, oppositely non-return is effective, and can be used for the one-way valve of low pressure flammable explosive gas.
This one-way valve is preferably made vertical structure, and suction port can be located at the upper end, and the air outlet can be located at the lower end, so that use lever to do the gravity counterweigh.
The present invention is by valve casing (1) (10), sealed mouth (14), flap (2), Lever type gravitational equilibrium mechanism compositions such as (Fig. 2).
Valve casing (1) (10) is made up of valve body (1), valve gap (10) and sealing component, clamp structure.Boundary dimension and material are determined by service condition.
Valve body (1) is provided with flange mouth and bearing (1a).Flange mouth is used for being connected with gas pipeline and with valve gap (10).Bearing (1a) is used for supporting thill rod-type gravitational equilibrium mechanism (Fig. 2).Bearing (1a) is provided with bearing hole, and bearing (11) can be installed, in order to the rotating shaft in the rest leverage (6).For reducing surface friction drag, can on bearing (1a), lubrication be set.Rotating shaft (6) passes valve body (1) by bearing hole, so be provided with the supporting sealing of being made up of sealing component and clamp structure on bearing (1a), sews to guarantee that gas does not have.At some in particular cases, can establish inflation inlet (1b) on the valve body (1),, play tightly to isolate flap (2) both sides gas so that when closed check valve, feed separation gas to sealed mouth (14).The pressure of separation gas should be complementary in the working pressure of air-flow.The signal that feeds separation gas can be sent by rocking bar (7).
The two ends of valve gap (10) also are provided with flange mouth, are used for being connected with gas pipeline and with valve body (1).The interior sectional area of valve gap (10) behind convenient valve opening, that is to say that flap (2) moves on the appropriate location of valve gap (10) greater than the discharge area of this one-way valve, and gas can pass through smoothly.Valve gap (10) plays position-limiting action to flap (2) simultaneously.
Sealed mouth (14) is contained between valve body (1) and the valve gap (10), and material is determined by service condition, can be metal or nonmetal.The corresponding position of the internal surface of sealed mouth (14) and flap (2) coincide, and is tight reliable to guarantee sealing.At some in particular cases, can design sealing gland groove (14a) on the internal surface of sealed mouth (14), this sealing gland groove (14a) communicates with inflation inlet (1b) on the valve body (1) by aperture, in order to feed separation gas, realizes sealing gland.
One end of flap (2) can be designed to butterfly, links to each other with rocking arm (5) on the gravitational equilibrium lever by connector element.Flap (2) has conical outer surface, can coincide with the corresponding position on the sealed mouth (14).Flap (2) can be descending with the postive direction air-flow, and one-way valve is opened; Also can be up with back draught, closed check valve.The descending distance of flap (2) can be limited by the bearing support of flap bottom, also other ways qualifications such as available constraints balanced lever angle of swing.
The center line of flap (2) and one-way valve are imported and exported center line on same straight line.The conical surface microcephaly of butterfly flap (2) makes progress, in face of positive draft, to reduce the resistance of positive draft.Flap (2) bottom surface is recessed, slightly larger in diameter is in the nominal diameter of one-way valve, face back draught, so that blast at the gas that is transmitted, detonation or because other reasons when producing inverted draft, flap (2) can be closed rapidly under the impact of reverse blast, stop gas backstreaming timely and effectively, guarantee gas circuit safety.
Lever type gravitational equilibrium mechanism (Fig. 2) is made up of rocking arm (5), rocking bar (7), rotating shaft (6) and weight (8) etc.The rocking arm (5) that is equivalent to lever " weighing arm " can link to each other with flap (2) by connector element, and this tie point then is equivalent to " emphasis " of lever.Weight (8) is installed on the rocking bar (7) that is equivalent to lever " arm of force ", and it is the force of lever that this place can be considered ".Rocking arm (5) and rocking bar (7) can be respectively be connected with rotating shaft (6) as lever " fulcrum " with square opening.Rotating shaft (6) is by bearing (11) rest on the bearing (1a).The weight of weight (8) can be with changing weight (8) or making weight (8) way such as made up and be adjusted, perhaps the working position of weight (8) on rocking bar (7) can be along rocking bar (7) length direction adjustment, so that adjust the impacting force of flap (2).The adjustable size of equilibrant is to the optimum state, to adapt to the forward circulation of low-pressure air current.
To being positioned at the outside member of valve body (1) in the Lever type gravitational equilibrium mechanism, protective housing (9) preferably is installed, to get rid of external interference, guarantee the working properly of valve.The available screw of protective housing (9) is installed on the valve body (1).
The present invention compares with existing one-way valve has following advantage: the first, the positive draft resistance is little.When having positive draft to pass through in the valve, only need very little pressure, valve can be opened, and opening force can not increase with the increase of opening degree.The second, non-return is active in one's movements.In air delivering pipeline, can be rapidly when producing back draught for a certain reason throttle down in time, cut off gas circuit.Three, sealing is tight.Sealing surface is smooth cone structure, and sealing is tight; In the occasion of special requirement, can also feed nitrogen or other suitable gas auxiliary seals, so that tight separation gas.
Fig. 1 is the structural drawing of Lever type gravitational equilibrium one-way valve.It shown in the figure closed condition of this one-way valve.
Fig. 2 is the structural drawing of the Lever type gravitational equilibrium mechanism of Lever type gravitational equilibrium one-way valve.The two ends of balanced lever are omitted among the figure, and its structure can be found out in Fig. 1.
Fig. 3 is the structural drawing of Lever type gravitational equilibrium one-way valve sealed mouth.
One embodiment of the present of invention, the one-way valve of forming by valve casing (1) (10), sealed mouth (14), flap (2), Lever type gravitational equilibrium mechanism (Fig. 2) and protective housing (9) etc.
The top of valve casing (1) (10) is valve body (1), and the bottom is valve gap (10), and valve body (1) links together with flange plate with valve gap (10), constitutes air-flow path; The upper end is a suction port, and the lower end is the air outlet; Two ends are equipped with flange plate, as the interface of this one-way valve and pipeline.Between valve body (1) and valve gap (10) sealing gasket is housed, fastening by connecting bolt.The interior sectional area of valve gap (10) is slightly larger than 2 times of this one-way valve discharge area.Valve casing (1) (10) is inner slick and sly, to reduce the resistance of air-flow.The side of valve body (1) is provided with bearing (1a), and bearing (1a) is gone up design bearing hole, by being contained in the rotating shaft (6) in bearing (11) the rest gravitational equilibrium lever in the bearing hole.Seal ring (12) is housed between rotating shaft (6) and bearing hole, fastening with friction top (13) and screw.Members such as lubricating cup have been set up on the bearing (1a), so that countershaft (6) is lubricated.Valve body (1) is provided with inflation inlet (1b), so that feed separation gas to sealed mouth (14) when closed check valve.
Sealed mouth (14) is contained between valve body (1) and the valve gap (10), and the internal surface of sealed mouth (14) can coincide with the corresponding position of flap (2), and sealing is tight.The internal surface of sealed mouth (14) is provided with sealing gland groove (14a), and this sealing gland groove (14a) communicates with inflation inlet (1b) on the valve body (1) by aperture, in order to feed separation gas, realizes sealing gland.
The top of flap (2) is butterfly, and epirelief is recessed, and the microcephaly makes progress, and its slightly larger in diameter is in the nominal diameter of one-way valve.The top is provided with the boss of a band pin-and-hole, links to each other with rocking arm (5) on the gravitational equilibrium lever by bearing pin (3), connecting plate (4) etc.The center line of flap (2) and one-way valve are imported and exported central lines.Flap (2) can be descending with positive draft, and one-way valve is opened; Also can be up with back draught, closed check valve.Under the closed check valve state, the corresponding position of the conical external surface of flap (2) and sealed mouth (14) coincide, and cuts off gas circuit.The bottom of flap (2) is saturating all around empty bearing ring, is positioned at butterfly concave surface one side of flap (2).During valve opening, bearing ring is bearing on the valve gap (10), and air-flow can be passed through by the saturating empty face of bearing ring periphery.Saturating empty area is about 1.2 times of one-way valve discharge area.
Lever type gravitational equilibrium mechanism (Fig. 2) is made up of rocking arm (5), rotating shaft (6), rocking bar (7), weight (8) etc.One end of rocking arm (5) links to each other with flap (2) by bearing pin (3), connecting plate (4).Cotter pin is equipped with in the end of bearing pin (3), in case bearing pin (3) comes off.The other end of rocking arm (5) is connected with square opening with the rotating shaft (6) that plays lever " fulcrum " effect, and fixes with Cock screw.Rotating shaft (6) is by bearing (11) rest.The square toes at rotating shaft (6) two ends, the seal arrangement that passes on the bearing hole stretches out valve body (1), and the square opening with rocking bar (7) end outside valve body (1) links to each other.Weight (8) is sleeved on the slideway of rocking bar (7), can move along this slideway, to adjust the size of trimming moment.Weight (8) is fixed on the appropriate location of rocking bar (7) with Cock screw.The gravitational equilibrium lever can with flap (2) move up and down and around the shaft (6) swing.
Protective housing (9) is welded with steel plate, is installed on the valve body (1) with screw.This protective housing (9) is used for protecting the member that is positioned at the outside leverage of valve body (1) not to be subjected to external interference, and is working properly to guarantee it.
This one-way valve positive draft resistance is little; Reverse closing motion is rapidly sensitive, and last time is effective, and sealing is tight reliable.The present invention can be widely used in the unidirectional conveying of low-pressure gas.Be particularly useful for the unidirectional conveying of low pressure flammable explosive gas.
Claims (7)
1, a kind of one-way valve of being made up of valve casing (1) (10), flap (2) and sealed mouth (14) is characterized in that on the valve casing (1) (10) the Lever type gravitational equilibrium mechanism being housed, and the rocking arm of this mechanism (5) links to each other with flap (2).
2,, it is characterized in that described Lever type gravitational equilibrium mechanism is made up of rocking arm (5), rotating shaft (6), rocking bar (7), weight (8) according to the described one-way valve of claim 1; Rocking arm (5) links to each other by the rotating shaft (6) that plays point action with rocking bar (7), constitutes lever; Rotating shaft (6) is by bearing (11) rest that is contained on the valve body (1); Weight (8) is installed on the rocking bar (7).
3,, it is characterized in that described weight (8) is sleeved on the slideway of rocking bar (7) according to the described one-way valve of claim 2.
4, according to the described one-way valve of claim 3, an end that it is characterized in that described flap (2) is a butterfly structure, and the conical external surface of protrusion can be coincide with the sealed mouth (14) in the valve casing (1) (10); The other end design of flap (2) has saturating empty bearing ring all around, is positioned at butterfly concave surface one side of flap (2).
5,, it is characterized in that the center line of described flap (2) and one-way valve import and export center line on same straight line according to the described one-way valve of claim 4.
6, according to the described one-way valve of claim 5, it is characterized in that the internal surface of described sealed mouth (14) is provided with sealing gland groove (14a), this sealing gland groove (14a) communicates with inflation inlet (1b) on the valve body (1) by aperture.
7, according to described one-way valve one of in the claim 1 to 6, it is characterized in that being positioned in the described Lever type gravitational equilibrium mechanism the outside member of valve body (1) and be provided with protective housing (9), this protective housing (9) is installed on the valve body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88202594 CN2036233U (en) | 1988-03-27 | 1988-03-27 | Lever-type gravity-balanced check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88202594 CN2036233U (en) | 1988-03-27 | 1988-03-27 | Lever-type gravity-balanced check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2036233U true CN2036233U (en) | 1989-04-19 |
Family
ID=4837569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88202594 Withdrawn CN2036233U (en) | 1988-03-27 | 1988-03-27 | Lever-type gravity-balanced check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2036233U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1091231C (en) * | 1997-06-07 | 2002-09-18 | 尹玉兰 | Drainage check valve |
| CN101914883A (en) * | 2010-07-23 | 2010-12-15 | 中国科学院寒区旱区环境与工程研究所 | Gravity balance type convection control damper |
| CN104165010A (en) * | 2014-08-27 | 2014-11-26 | 洪满 | Automatic waterproof switch using gravity reaction force |
| CN107101028A (en) * | 2016-12-29 | 2017-08-29 | 大唐环境产业集团股份有限公司 | A kind of taper sealing structure malleation sealing gland bypass valve |
| CN113418029A (en) * | 2021-07-05 | 2021-09-21 | 洛阳三旋智能装备有限公司 | Multi-way valve with gas-assisted sealing function |
-
1988
- 1988-03-27 CN CN 88202594 patent/CN2036233U/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1091231C (en) * | 1997-06-07 | 2002-09-18 | 尹玉兰 | Drainage check valve |
| CN101914883A (en) * | 2010-07-23 | 2010-12-15 | 中国科学院寒区旱区环境与工程研究所 | Gravity balance type convection control damper |
| CN104165010A (en) * | 2014-08-27 | 2014-11-26 | 洪满 | Automatic waterproof switch using gravity reaction force |
| CN107101028A (en) * | 2016-12-29 | 2017-08-29 | 大唐环境产业集团股份有限公司 | A kind of taper sealing structure malleation sealing gland bypass valve |
| CN113418029A (en) * | 2021-07-05 | 2021-09-21 | 洛阳三旋智能装备有限公司 | Multi-way valve with gas-assisted sealing function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2800004Y (en) | Rubber tube clip valve | |
| CN2036233U (en) | Lever-type gravity-balanced check valve | |
| CN1884876A (en) | Constant velocity buffering exhaust valve | |
| US4569636A (en) | Device for regulating the delivery of rotary compressors | |
| JPH0315400U (en) | ||
| CN212407703U (en) | Automatic pressure regulating device for water delivery pipeline | |
| CN205479527U (en) | Check valve with adjustable damping buffering | |
| CN205937870U (en) | Big one -way air current of latus rectum is fast by solenoid valve | |
| CN201065962Y (en) | Double-eccentricity v-shaped regulation ball valve | |
| CN209294512U (en) | A kind of micro- pendulum-type sphere-contact shut-off valve | |
| CN2177147Y (en) | Adjustable flow vertical lift check valve | |
| CN2130969Y (en) | Stop valve | |
| CN1119716A (en) | Fluid flow control valves | |
| CN2438880Y (en) | Differential pressure selective valve | |
| CN218118737U (en) | Explosion-proof pneumatic ball valve | |
| CN2154938Y (en) | Low pressure large flow safety overflow valve | |
| CN2485492Y (en) | Self sucking or little pressure check valve | |
| CN219587658U (en) | Novel electronic injection throttle valve | |
| CN202360817U (en) | One-way air suction valve | |
| CN110925055B (en) | One-way oil return gas sealing cover plate structure and oil-gas separation oil return device | |
| CN209278562U (en) | Damping check valve | |
| CN2278123Y (en) | Check vavle for fire fighting | |
| CN2380772Y (en) | Safety intelligent valve for gas | |
| SU859735A1 (en) | Non-return valve | |
| CN2519079Y (en) | Energy-storage fluid automatic controlling valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| 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 |