CN204828805U - Non -return stop valve - Google Patents
Non -return stop valve Download PDFInfo
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- CN204828805U CN204828805U CN201520538599.4U CN201520538599U CN204828805U CN 204828805 U CN204828805 U CN 204828805U CN 201520538599 U CN201520538599 U CN 201520538599U CN 204828805 U CN204828805 U CN 204828805U
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- stop valve
- spring
- valve
- inwall
- spacing hole
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Abstract
The utility model discloses an effectual non -return stop valve of non return. The utility model provides a: a non -return stop valve, which comprises the following components: a valve body, valve clack and being used for drive the valve clack do about linear motion's valve rod, be provided with in the valve body and have open -ended isolation inner wall, the both sides that keep apart the inner wall constitute imported chamber and outlet chamber respectively, import chamber and outlet chamber switch on through the opening mutually, the work portion of lower extreme for being inverted circular truncated cone of valve clack, work portion including can with keep apart the inner wall closely sealed inclined plane and the bottom of laminating, spacing hole has been offered on the bottom, be connected with the spring on the inner wall in spacing hole, the other end in spring hole spacing relatively is connected with and covers the open -ended non return part of keeping apart the inner wall, sealed inclined plane is located when keeping apart the inner wall top, the spring is in the contraction state and the non return part covers the opening. The utility model discloses a non -return stop valve can effectively prevent backward flow of the flow stopping body and low in manufacturing cost.
Description
Technical field
The utility model relates to valve technology field, particularly a kind of cut-off with non-return effect.
Background technique
Stop valve refers to the valve of closure member (flap) along the movement of valve seat center line, flap is along the center line moving linearly of valve seat, due to such valve valve rod open or shutoff stroke relatively short, and there is cutting function very reliably, again due to the change of valve seat port and the stroke direct proportionality of flap, be very suitable for the adjustment to flow, therefore, such shutoff valve that dams is suitable as and cuts off or regulate and throttling use very much.At present, stop valve generally includes valve body, flap and the valve rod for driving flap to do upper and lower straight line motion, the isolation inwall with opening is provided with in valve body, isolation inwall both sides form snout cavity and outlet plenum respectively, snout cavity and outlet plenum are conducted by opening, valve rod comprises the built-in portion being placed in valve inner and the external portion being placed on valve body outside, the other end and the flap in relatively external portion of the built-in portion of described valve body are connected, and described flap is placed in conducting place of snout cavity and outlet plenum and can conflicts with isolation inwall and arrange formation and be tightly connected.
Traditional stop valve function ratio is more single, there is no check function, but when stop valve is in opening state, fluid in outlet plenum likely can reflux, easily enter ducts upstream to pollute, although the patent of invention that existing such as China Patent No. is ZL2011102050891 provides a kind of technological scheme, that is: a kind of stop valve, it has the blind hole of certain depth on valve plate top, valve rod inserts among the blind hole in valve plate, formation valve rod is flexibly connected with valve plate, or valve rod is provided with the valve plate periphery of blind hole in inserting, formation valve rod is flexibly connected with valve plate, valve plate is close on the sealing surface of valve body, the pressure Open valve by force of fluid self is relied on when pipeline has pressure, spring force throttle down is relied on when pipeline is exerted pressure, although this technological scheme makes stop valve have certain non-return effect, but when the hydrodynamic pressure in pipeline is less cannot overcome spring force and need pipeline flow time, this stop valve just cannot accomplish to allow pipeline flow immediately, harmful effect can be caused to activity in production.And the utility model patent that China Patent No. is ZL032473907 provides a kind of stop valve with non-return effect equally, its technological scheme is: a kind of stop valve is made up of valve body, spool, valve rod, handwheel, there is the intake tunnel, exhalant canal, the valve rod installation passage that are interconnected, spool is arranged on valve rod, valve body has left chamber and right chamber and is interconnected, and valve rod spool is installed by left chamber; Right chamber has a upper end-hole, a water outlet, is provided with a non-return valve core in right chamber, and the sealing of upper end-hole Sealing reaches liquid sealing, and the position bearing pin that left chamber and right chamber engage installs non-return valve core.This technological scheme realizes check function by installing non-return valve core in stop valve inside, and this requires higher for manufacture level, and assembly technology is very complicated, and cost compare is high.
Summary of the invention
For the deficiency that prior art exists, main purpose of the present utility model is that providing a kind of can effectively anti-fluid reflux and the stop valve of low cost of manufacture.
For achieving the above object, the utility model provides following technological scheme, a kind of stop valve, comprise valve body, flap and the valve rod for driving flap to do upper and lower straight line motion, the isolation inwall with opening is provided with in described valve body, the both sides of described isolation inwall form snout cavity and outlet plenum respectively, described snout cavity and outlet plenum are conducted by opening, the lower end of described flap is the working part in reverse frustoconic, described working part comprises the sealing inclined-plane and bottom that can fit tightly with isolation inwall, described bottom offers spacing hole, the inwall of described spacing hole is connected with spring, the other end in described spring relative limit hole is connected with the non return part of the opening that can cover isolation inwall, when described sealing inclined-plane is positioned at above isolation inwall, described spring is in contraction state and non return part covers opening.
Preferably, described spacing hole is outside equipped with hollow locating column, and described spring is fed through hollow locating column.
Preferably, be provided with internal thread in described spacing hole, described hollow locating column is provided with outside thread, described hollow locating column is threaded in spacing hole.
Preferably, described non return part is frustoconic shape, and described non return part is inclined-plane with the joint of isolation inwall, and described inclined-plane is provided with seal ring.
Preferably, on the two ends of the described spring inwall that is welded on spacing hole respectively and non return part.
Preferably, described valve body is provided with filler in the contacting point with valve rod.
Preferably, described valve body is disposed with filler pressing sleeve and hold-down grid above filler, the below of described filler is provided with Packing seat.
Preferably, described hollow locating column is welded on the inwall of spacing hole.
The utility model has the following advantages relative to prior art tool, when stop valve is closed, namely seal inclined-plane and play seal action with isolation inwall close contact, can prevent the fluid in snout cavity from entering outlet plenum from opening, there is the effect of traditional stop valve.When stop valve is opened, namely flap is driven to move upward by valve rod, make flap no longer with isolation contact internal walls, now opening is opened, and the spring be connected with flap is in contraction state, be connected to non return part on spring also with isolation inwall close contact, and envelope the bottom of opening, after fluid to flow into from snout cavity and enters opening, fluid applies pressure to non return part, until non return part and isolation inwall separate fluid afterwards can enter outlet plenum.Obviously, it should be understood that the quality comparation of non return part is little herein, the elastic force of spring is also smaller, and fluid can overcome the elastic force of spring easily, and the comparison of resistance that non return part and spring convection cell cause is little.When the fluid flow in snout cavity goes to zero gradually or pressure in outlet plenum is very large, refluence phenomenon will be there is in the fluid being positioned at outlet plenum, if not in time stop valve is closed, fluid so in outlet plenum by entering snout cavity after opening, thus will pollute the fluid in snout cavity.In the present embodiment, when the flow of the fluid in snout cavity diminishes, the elastic force of spring is greater than the pressure of fluid to spring and non return part, so spring just can retract non return part and make non return part and isolation inwall close contact, thus accomplish the generation preventing backflow phenomenon in advance, relative to other stop valves with check function, stop valve low cost of manufacture of the present utility model and also non-return effective.
Accompanying drawing explanation
Fig. 1 is the sectional view of stop valve of the present utility model;
Fig. 2 is A portion enlarged diagram in Fig. 1;
Fig. 3 is the explosive view of flap, spring, hollow locating column and non return part.
In figure: 1, valve body; 2, flap; 3, valve rod; 4, inwall is isolated; 5, snout cavity; 6, outlet plenum; 7, inclined-plane is sealed; 8, bottom; 9, spacing hole; 10, spring; 11, non return part; 12, hollow locating column; 13, filler; 14, filler pressing sleeve; 15, hold-down grid; 16, Packing seat.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As described in Figure 1, a kind of stop valve, comprise valve body 1, flap 2 and the valve rod 3 for driving flap 2 to do upper and lower straight line motion, the isolation inwall 4 with opening is provided with in valve body 1, the both sides of isolation inwall 4 form snout cavity 5 and outlet plenum 6 respectively, snout cavity 5 and outlet plenum 6 are conducted by opening, the lower end of flap 2 is the working part in reverse frustoconic, working part comprises the sealing inclined-plane 7 and bottom 8 that can fit tightly with isolation inwall 4, the scheme of the present embodiment offers spacing hole 9 on bottom 8, the inwall of spacing hole 9 is connected with spring 10, the other end in spring 10 relative limit hole 9 is connected with the non return part 11 of the opening that can cover isolation inwall 4, when sealing inclined-plane 7 is positioned at above isolation inwall 4, spring 10 is in contraction state and non return part 11 covers opening.
The working principle of stop valve of the present utility model is as follows: when stop valve is closed, namely seal inclined-plane 7 and play seal action with isolation inwall 4 close contact, can prevent the fluid in snout cavity 5 from entering outlet plenum 6 from opening, there is the effect of traditional stop valve.When stop valve is opened, namely flap 2 is driven to move upward by valve rod 3, flap 2 is no longer contacted with isolation inwall 4, now opening is opened, and the spring 10 be connected with flap 2 is in contraction state, be connected to non return part 11 on spring 10 also with isolation inwall 4 close contact, and envelope the bottom of opening, after fluid to flow into from snout cavity 5 and enters opening, fluid applies pressure to non return part 11, until non return part 11 and isolation inwall 4 separate fluid afterwards can enter outlet plenum 6.Obviously, it should be understood that the quality comparation of non return part 11 is little herein, the elastic force of spring 10 is also smaller, and fluid can overcome the elastic force of spring 10 easily, and the comparison of resistance that non return part 11 and spring 10 convection cell cause is little.
When the fluid flow in snout cavity 5 goes to zero gradually or pressure in outlet plenum 6 is very large, refluence phenomenon will be there is in the fluid being positioned at outlet plenum 6, if not in time stop valve is closed, fluid so in outlet plenum 6 by entering snout cavity 5 after opening, thus will pollute the fluid in snout cavity 5.In the present embodiment, when the flow of the fluid in snout cavity 5 diminishes, the elastic force of spring 10 is greater than the pressure of fluid to spring 10 and non return part 11, so spring 10 just can retract non return part 11 and make non return part 11 and isolation inwall 4 close contact, thus accomplish the generation preventing backflow phenomenon in advance, relative to other stop valves with check function, stop valve low cost of manufacture of the present utility model and also non-return effective.
In addition, hollow locating column 12 is outside equipped with at spacing hole 9, spring 10 is fed through hollow locating column 12, in order to make spring 10 follow flap 2 move up and down or be subject to fluid pressure effect and stretch or contractile motion time ensure that spring 10 can not torsional deformation, hollow locating column 12 just can the double swerve of restraining spring 10, avoid spring 10 to lose efficacy, extend the working life of spring 10.
As the means of fixation of hollow locating column 12 with flap 2, the present embodiment by being provided with internal thread in spacing hole 9, hollow locating column 12 is provided with outside thread, hollow locating column 12 is threaded in spacing hole 9, be threaded and make hollow locating column 12 and flap 2 keep good connection by the self-locking action of self, simultaneously when spring 10 is impaired, also fast hollow locating column 12 can be carried out dismounting, facilitate the maintenance of stop valve.
Non return part 11 in the present embodiment is in frustoconic shape, with reference to Fig. 3, non return part 11 is inclined-plane with the joint of isolation inwall 4, inclined-plane is provided with seal ring, when stop valve does not also contact with isolation inwall 4 in open mode and flap 2, even if fluid refluxes, and now because the inclined-plane of non return part 11 and isolation inwall 4 close contact, seal ring ensure that sealing effect more, so just thoroughly can ensure that the fluid in outlet plenum 6 can not enter in snout cavity 5.
In the present embodiment, on the inwall that the two ends of spring 10 are welded on spacing hole 9 respectively and non return part 11, be welded to connect and can ensure spring 10 steady-working state, can not come off in spacing hole 9 easily or depart from non return part 11.
Further, valve body 1 is provided with filler 13 in the contacting point with valve rod 3, valve body 1 is disposed with filler pressing sleeve 14 and hold-down grid 15 above filler 13, the below of described filler 13 is provided with Packing seat 16.The setting of filler 13, in the process that the cooperatively interacting of filler pressing sleeve 14, hold-down grid 15 and Packing seat 16 can make to move up and down at valve rod 3, the sealing between filler 13 and valve rod 3 is become better and better, and ensure that the sealing of stop valve.Hollow locating column 12 is welded on the inwall of spacing hole 9, the one be connected with the inner thread of spacing hole 9 as above-mentioned hollow location is out of shape, hollow locating column 12 is fixedly installed on flap 2, thoroughly can prevent hollow locating column 12 from departing from from flap 2, effectively just exempt from hollow locating column 12 and be blocked in pipeline.
The above is only preferred implementation of the present utility model, protection domain of the present utility model be not only confined to above-described embodiment, and all technological schemes belonged under the utility model thinking all belong to protection domain of the present utility model.It should be pointed out that for those skilled in the art, do not departing from the some improvements and modifications under the utility model principle prerequisite, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (8)
1. a stop valve, comprise valve body, flap and the valve rod for driving flap to do upper and lower straight line motion, the isolation inwall with opening is provided with in described valve body, the both sides of described isolation inwall form snout cavity and outlet plenum respectively, described snout cavity and outlet plenum are conducted by opening, it is characterized in that: the lower end of described flap is the working part in reverse frustoconic, described working part comprises the sealing inclined-plane and bottom that can fit tightly with isolation inwall, described bottom offers spacing hole, the inwall of described spacing hole is connected with spring, the other end in described spring relative limit hole is connected with the non return part of the opening that can cover isolation inwall, when described sealing inclined-plane is positioned at above isolation inwall, described spring is in contraction state and non return part covers opening.
2. a kind of stop valve according to claim 1, it is characterized in that: described spacing hole is outside equipped with hollow locating column, described spring is fed through hollow locating column.
3. a kind of stop valve according to claim 2, is characterized in that: be provided with internal thread in described spacing hole, and described hollow locating column is provided with outside thread, and described hollow locating column is threaded in spacing hole.
4. a kind of stop valve according to claim 3, is characterized in that: described non return part is frustoconic shape, and described non return part is inclined-plane with the joint of isolation inwall, and described inclined-plane is provided with seal ring.
5. a kind of stop valve according to claim 4, is characterized in that: on the inwall that the two ends of described spring are welded on spacing hole respectively and non return part.
6. a kind of stop valve according to claim 5, is characterized in that: described valve body is provided with filler in the contacting point with valve rod.
7. a kind of stop valve according to claim 6, it is characterized in that: described valve body is disposed with filler pressing sleeve and hold-down grid above filler, the below of described filler is provided with Packing seat.
8. a kind of stop valve according to claim 2, is characterized in that: described hollow locating column is welded on the inwall of spacing hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520538599.4U CN204828805U (en) | 2015-07-23 | 2015-07-23 | Non -return stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520538599.4U CN204828805U (en) | 2015-07-23 | 2015-07-23 | Non -return stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204828805U true CN204828805U (en) | 2015-12-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520538599.4U Active CN204828805U (en) | 2015-07-23 | 2015-07-23 | Non -return stop valve |
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| Country | Link |
|---|---|
| CN (1) | CN204828805U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989853A (en) * | 2015-07-23 | 2015-10-21 | 氟络塞尔特种阀门(苏州)有限公司 | Check stop valve |
-
2015
- 2015-07-23 CN CN201520538599.4U patent/CN204828805U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989853A (en) * | 2015-07-23 | 2015-10-21 | 氟络塞尔特种阀门(苏州)有限公司 | Check stop valve |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |