CN204025793U - Leakage-preventing check valve - Google Patents
Leakage-preventing check valve Download PDFInfo
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- CN204025793U CN204025793U CN201420416931.5U CN201420416931U CN204025793U CN 204025793 U CN204025793 U CN 204025793U CN 201420416931 U CN201420416931 U CN 201420416931U CN 204025793 U CN204025793 U CN 204025793U
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Abstract
The utility model discloses a kind of leakage-preventing check valve, relate to the pipeline valve of a kind of pre-leakage-proof and medium back flow, its structure is by valve body, valve gap, guide grab, the formation such as flap and elastic element, mainly be provided with sealing surface and lower sealing surface at the valve pocket inwall of valve body, and on guide grab, be provided with the flap that edge is upturned in arc structure, when there is water clock situation in pipeline, by the movable sealing that forms between flap lower end surface and lower sealing surface and between flap edge and upper sealing surface form movable sealing, just can play the iris action to low discharge medium, avoid occurring the incalculable phenomenon of water meter because there is water clock, thus effectively realize the drip-proof function of safety check, leakage-preventing check valve after improvement is except the anti-medium back flow function possessing conventional check valve, also there is structural design simple, cost of production is low, sealing is reliable, the advantages such as convenient are replaced in dismounting.
Description
Technical field
The utility model relates to a kind of for preventing the check valve structure of medium back flow in pipeline, refers in particular to leakage-preventing check valve.
Background technique
Leakage-preventing check valve is a kind of pipeline valve being widely used in the water system such as city, family, it can be connected with the apparatus for metering fluids in pipe-line system, as water meter etc., due to the problem of water meter sensitivity usually, when the flow of water in pipeline is very little, water meter just cannot carry out accurate metering; Meanwhile, if water meter can be caused again to count when manifold pressure fluctuates; Therefore, leakage-preventing check valve is used just well can to avoid the generation of above-mentioned situation.Traditional leakage-preventing check valve and disclosed China Patent No. are " leakage-preventing check valve " structural similarity of 201220056233.X, its drip-proof structural design mainly in the valve pocket of valve body setting-in one there is the rubber seal of double-sealing face, cause poppet head to be moved by pushing tow when there is weeping after, the rubber seal of this poppet head just by having double-sealing face realizes sealing, thus plays drip-proof object; Therefore, Anti-dripping structure disclosed in above-mentioned patent structure is mainly realized by the rubber seal of double-sealing face, often there is following defect in its actual use: one, need special this rubber seal, to be also difficult to control in valve pocket that this rubber seal is correctly fitted to valve body and dismounting is replaced in valve pocket simultaneously; Two, the poppet head under normality is by spring push, its excircle contacts all the time on two sealing surfaces, rubber seal can be impacted for a long time in the frequent movement of poppet head, thus cause the mounting point of rubber seal to produce the distortion of displacement and sealing surface, so that affect sealing effect; Three, overall construction design is too complicated, and cost of production is too high, cannot widely use.
Summary of the invention
Technical problem to be solved in the utility model is to overcome the defect of prior art and convenient, that leakage-proof the is effective leakage-preventing check valve that provides that a kind of structure is simple, cost is low, sealing is reliable, dismounting is replaced.
Technical problem of the present utility model is achieved through the following technical solutions:
A kind of leakage-preventing check valve, comprises valve body and the valve gap being arranged on body top; Valve pocket is provided with in described valve body, the inwall of this valve pocket is provided with sealing surface, also be provided with by the guide grab in elastic element pushing tow Open-close sealing face, guide grab is provided with the flap forming movable sealing with described sealing surface, and described sealing surface is the upper sealing surface and the lower sealing surface that are separately positioned on valve pocket inwall according to upper and lower position; Described flap edge is the arc structure be upturned, and this flap lower end surface and described lower sealing surface form movable sealing, and the external diameter at this flap edge is greater than the internal diameter of sealing surface, and forms movable sealing with described upper sealing surface.
The upper and lower both sides of described upper sealing surface are respectively equipped with chamfering structure.
It is convex and around the convex annular groove of sealing that the end face of described lower sealing surface is provided with a circle sealing, and the convex and described flap lower end surface of sealing forms movable sealing.
Stiffening rib is provided with inside the arc structure of described flap.
Described flap edge and upper sealing surface are interference fit.
Described flap is for having flexible nitrile rubber flap.
Described valve gap is threaded in body top, between valve gap and valve body, be provided with anaerobic adhesive.
Described guide grab top is extended with the axis of guide, and this axis of guide passes and is movably arranged in the pilot hole on valve gap; Described elastic element is sleeved on outside the axis of guide, and these elastic element two ends difference pushing tow is on pilot hole and guide grab.
The locating slot of locating is installed in the end that described pilot hole lower end surface is provided with for described elastic element.
Described guide grab end face is set to arc surface, and described elastic element pushing tow is on this arc surface.
Compared with prior art, the utility model is mainly provided with sealing surface and lower sealing surface at the valve pocket inwall of valve body, and on guide grab, be provided with the flap that edge is upturned in arc structure, when there is water clock situation in pipeline, by the movable sealing that forms between flap lower end surface and lower sealing surface and between flap edge and upper sealing surface form movable sealing, just can play the iris action to low discharge medium, avoid occurring the incalculable phenomenon of water meter because there is water clock, thus effectively realize the drip-proof function of safety check, it is simple that leakage-preventing check valve after improvement also has structural design, cost of production is low, sealing is reliable, the advantages such as convenient are replaced in dismounting.
Accompanying drawing explanation
Fig. 1 is sectional structure schematic diagram of the present utility model (safety check closed state).
Fig. 2 is the working state of Fig. 1 when there is water clock situation.
Fig. 3 is the working state of Fig. 1 when opening completely.
Embodiment
To elaborate again to the utility model embodiment by above-mentioned accompanying drawing below.
As shown in Figure 1 to Figure 3,1. sealing surface on valve body, 11. valve pockets, 12., 13. lower sealing surface, 131. sealings convex, 132. annular grooves, 2. flap, 3. elastic element, 4. valve gap, 41. water ports, 42. pilot holes, 43. locating slots, 5. guide grab, 51. axis of guides.
Leakage-preventing check valve, as shown in Figure 1, the pipeline valve of what it related to is a kind of pre-leakage-proof and medium back flow, its structure is mainly made up of valve body 1, valve gap 4, guide grab 5, flap 2 and elastic element 3 etc.
Described valve body 1 is vertical valve body, is provided with upper and lower through valve pocket 11 in it, can be used for the medium circulation in pipe-line system; Described valve gap 4 is connected to valve pocket 11 one end at valve body 1 top threadably, is provided with the water port 41 communicated with valve pocket 11 in valve gap 4, seals between valve gap 4 with valve body 1 by using anaerobic adhesive to carry out being connected.
Described valve pocket 11 inwall is respectively equipped with upper sealing surface 12 and lower sealing surface 13 according to upper and lower position, and on this, sealing surface 12 internal diameter need be greater than lower sealing surface 13 internal diameter; The upper and lower both sides of described upper sealing surface 12 are respectively equipped with the chamfering structure tilted according to special angle; The end face of described lower sealing surface 13 is provided with a circle sealing convex 131 and is looped around the annular groove 132 sealing convex periphery.
Described guide grab 5 is according to can the mode of upper and lower activity be arranged in valve pocket 11, its mounting point need be positioned at above lower sealing surface 13, a circle mounting groove is provided with at the excircle of guide grab 5, be embedded with by the flap 2 there is flexible nitrile rubber making in this mounting groove, the guide grab 5 of hard material and the flap 2 of soft material combine, and mainly play the effect of guiding and sealing; Described guide grab 5 bottom is three claw type of carrying out leading; Described guide grab 5 top is extended with the axis of guide 51, this axis of guide passes and is movably arranged in the pilot hole 42 on valve gap 4, elastic element 3 is set with outside the axis of guide, this elastic element can adopt cone spring, its upper end location and installation is in the locating slot 43 of pilot hole 42 lower end surface, elastic element 3 lower end pushing tow in guide grab 5 end face of arc surface, therefore by the pre-thrust that the pushing tow of elastic element 3 makes guide grab 5 possess all the time to move downward under normality.
Described flap 2 maximum outside diameter need be greater than the minimum diameter of sealing surface 12, and the edge of flap 2 is the arc structure be upturned, therefore flap 2 edge by guide grab 5 activity and and form interference fit between upper sealing surface 12, and form movable sealing, and flap 2 lower end surface contacts carrying out sealing with the sealing of lower sealing surface 13 convex 131, and form movable sealing.
This leakage-preventing check valve under normal conditions as shown in Figure 1, guide grab 5 is between upper and lower sealing surface, the sealing contact of flap 2 lower end surface is in the sealing convex 131 of lower sealing surface 13 end face, and flap 2 edge and upper sealing surface 12 depart from, and now whole safety check is in hermetically closing state.
When there is the situation of water clock as shown in Figure 2, medium in valve pocket 11 cannot overcome elastic element 3 and upper sealing surface 12 and promote flap edge completely up over upper sealing surface 12 for the resistance of flap 2, thus on the chamfering structure causing flap 2 edge seal to contact on the downside of upper sealing surface 12, now medium cannot pass through, safety check is still in closed condition, thus the obstruct played low discharge medium, water meter incalculable phenomenon when avoiding occurring water clock.
When as shown in Figure 3 when opening tap instantaneously and cause the flow in pipeline to increase instantaneously, the medium in valve pocket 11 will promote flap 2 completely up over upper sealing surface 12, and now medium forms circulation, and safety check is in unlatching working state.
When stability of flow in pipeline, the upper sealing surface 12 in flap 2 edge and valve pocket 11 is contactless, and the medium in valve pocket 11 only need overcome the resistance of elastic element 3, so keep safety check still can being made in running order compared with small flow.
When there is no medium in pipeline or occurring the situation of medium back flow, the pressure of elastic element 3 pairs of flaps 2 is by the resistance of the chamfering structure that is greater than on the upside of upper sealing surface 12 and flap 2 edge arc structure, now elastic element 3 will be crossed upper sealing surface 12 from the upside chamfering structure of upper sealing surface 12 and presses to lower sealing surface 13 in pushing tow flap 2 edge, and make flap 2 lower end surface seal contact in the sealing of lower sealing surface 13 convex 131, again realize flap 2 to seal, safety check will cut out; Upside chamfering structure designed by upper sealing surface 12 when flap 2 edge is crossed, can reduce resistance when flap resets.
Claims (10)
1. a leakage-preventing check valve, comprises valve body (1) and is arranged on the valve gap (4) of body top; Valve pocket (11) is provided with in described valve body (1), the inwall of this valve pocket is provided with sealing surface, also be provided with by the guide grab (5) in elastic element (3) pushing tow Open-close sealing face, guide grab is provided with the flap (2) forming movable sealing with described sealing surface, it is characterized in that described sealing surface is the upper sealing surface (12) and the lower sealing surface (13) that are separately positioned on valve pocket (11) inwall according to upper and lower position; Described flap (2) edge is the arc structure be upturned, this flap (2) lower end surface and described lower sealing surface (13) form movable sealing, the external diameter at this flap (2) edge is greater than the internal diameter of sealing surface (12), and forms movable sealing with described upper sealing surface (12).
2. leakage-preventing check valve according to claim 1, is characterized in that the upper and lower both sides of described upper sealing surface (12) are respectively equipped with chamfering structure.
3. leakage-preventing check valve according to claim 1 and 2, it is characterized in that the end face of described lower sealing surface (13) is provided with circle sealing convex (131) and around sealing convex annular groove (132), sealing convex (131) and described flap (2) lower end surface form movable sealing.
4. leakage-preventing check valve according to claim 1 and 2, is provided with stiffening rib inside the arc structure that it is characterized in that described flap (2).
5. leakage-preventing check valve according to claim 1 and 2, is characterized in that described flap (2) edge and upper sealing surface (12) are interference fit.
6. leakage-preventing check valve according to claim 1 and 2, is characterized in that described flap (2) is for having flexible nitrile rubber flap.
7. leakage-preventing check valve according to claim 1 and 2, is characterized in that described valve gap (4) is threaded in valve body (1) top, between valve gap (4) and valve body (1), is provided with anaerobic adhesive.
8. leakage-preventing check valve according to claim 1 and 2, is characterized in that described guide grab (5) top is extended with the axis of guide (51), and this axis of guide passes and is movably arranged in the pilot hole (42) on valve gap (4); Described elastic element (3) is sleeved on the axis of guide (51) outward, and this elastic element (3) two ends difference pushing tow is on pilot hole (42) with guide grab (5).
9. leakage-preventing check valve according to claim 8, is characterized in that the locating slot (43) of locating is installed in the end that described pilot hole (42) lower end surface is provided with for described elastic element (3).
10. leakage-preventing check valve according to claim 8, it is characterized in that described guide grab (5) end face is set to arc surface, described elastic element (3) pushing tow is on this arc surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420416931.5U CN204025793U (en) | 2014-07-28 | 2014-07-28 | Leakage-preventing check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420416931.5U CN204025793U (en) | 2014-07-28 | 2014-07-28 | Leakage-preventing check valve |
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| Publication Number | Publication Date |
|---|---|
| CN204025793U true CN204025793U (en) | 2014-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420416931.5U Active CN204025793U (en) | 2014-07-28 | 2014-07-28 | Leakage-preventing check valve |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107687524A (en) * | 2017-09-30 | 2018-02-13 | 山西好利阀机械制造有限公司 | New construction check-valves |
| CN108413099A (en) * | 2017-07-31 | 2018-08-17 | 成都威特电喷有限责任公司 | It is switched off or on the partition check-valves of oil supply system oil circuit medium back flow |
| CN109707995A (en) * | 2019-01-09 | 2019-05-03 | 中国原子能科学研究院 | A kind of note hydrogen note argon skid-mounted system for sodium-cooled fast reactor |
| CN110337333A (en) * | 2017-03-21 | 2019-10-15 | 宝洁公司 | Distributor |
-
2014
- 2014-07-28 CN CN201420416931.5U patent/CN204025793U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110337333A (en) * | 2017-03-21 | 2019-10-15 | 宝洁公司 | Distributor |
| CN108413099A (en) * | 2017-07-31 | 2018-08-17 | 成都威特电喷有限责任公司 | It is switched off or on the partition check-valves of oil supply system oil circuit medium back flow |
| CN107687524A (en) * | 2017-09-30 | 2018-02-13 | 山西好利阀机械制造有限公司 | New construction check-valves |
| CN109707995A (en) * | 2019-01-09 | 2019-05-03 | 中国原子能科学研究院 | A kind of note hydrogen note argon skid-mounted system for sodium-cooled fast reactor |
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