CN203770752U

CN203770752U - Check valve

Info

Publication number: CN203770752U
Application number: CN201420097021.5U
Authority: CN
Inventors: 卓旦春
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-03-05
Filing date: 2014-03-05
Publication date: 2014-08-13
Anticipated expiration: 2024-03-05

Abstract

The utility model provides a check valve, belongs to the technical field of valves, and solves the problem that the conventional check valve has a complex structure. The check valve comprises a valve body provided with a cavity; a valve cap is in threaded connection with the valve body, and a water outlet and a water inlet are formed in the end parts of the valve body and the valve cap respectively; a valve core is arranged in the valve body; the center lines of the water inlet, the water outlet and the valve core are collinear; the valve core is pie-shaped; a plurality of gaps I penetrating the valve core in an axial direction are formed in the valve core, and distributed uniformly in the circumferential direction; gaps II, which are the same as the gaps I in shape, are formed in one end, opposite to the valve core, of the valve cap; the gaps I and the gaps II are staggered reciprocally; a cushion structure which can enable the valve core to translate linearly and axially and has a cushion effect on the valve core is arranged between the valve cap and the valve body. The check valve has the advantage that the service life of the valve core is prolonged.

Description

A kind of safety check

Technical field

The utility model belongs to valve technology field, relates to a kind of safety check.

Background technique

Safety check is called again reflux valve, check valve, back pressure valve, one-way valve.In this class valve tube road, the power of the mobile generation of fluid itself opens and closes automatically, and belongs to a kind of automatic valve.Safety check is used for pipe-line system, and its Main Function is to prevent that fluid from flowing backwards, preventing the reversion of pump and drive motor thereof, and the releasing of container inner fluid.According to the difference of material, safety check goes on the pipeline of various fluids.Therefore safety check has the one-way flow of the fluid of realization, and the characteristic that stops fluid oppositely to flow backwards, so be all widely used in daily life and industry.

Traditional safety check generally forms the also valving of control media one-way flow by valve body, valve gap, flap hack lever and sealing gasket, and valve inner processing is inconvenient, and structure neither be very simple.And because the safety check of conventional construction itself does not have decontamination function, the solution of conventional is design specialized scrubbing filter plant in pipe-line system, this mode in application process, exist install complicated, connected element is many, easily produce leak, volume is large, inconveniently keep in repair, lose time, high in cost of production shortcoming.

For this situation, people have recognized this deficiency, and carry out improvement, a kind of one-way valve [application number: 201220612520.4 openly proposing as Chinese patent literature data; Notice of authorization number: CN202972034U], comprise tubular valve body, in tubular valve body, be respectively equipped with valve seat and the bearing of ring, between valve seat and bearing, be provided with successively sheet spool, Returnning spring, described poppet shaft is two arc sections that connect by straightway to cross-sectional circumference, the spool periphery bearing inwall that is connected.Although this one-way valve has advantages of integrated filtration and non-return and is integrated, but because needing specific bearing that spool is installed, this one-way valve make spool in moving process, avoid colliding with the internal unit of this one-way valve, cause this one-way valve structures comparatively complicated, and due to the restriction of this one-way valve shape, cause changing filter screen inconvenience.

Summary of the invention

The purpose of this utility model is to have the problems referred to above for existing technology, a kind of safety check has been proposed, the goal of the invention of this safety check is to avoid spool and safety check internal unit to bump, the working life of having improved safety check when improving working life of spool.

The purpose of this utility model can realize by following technical proposal: a kind of safety check, comprise the valve body with cavity, described valve body screw thread is connected with valve gap, and the end of valve body and valve gap forms respectively the mouth of a river and water intake, in described valve body, be provided with spool, described water intake, the centerline collineation of water outlet and spool, it is characterized in that, described spool is round pie, on described spool, having some breach that run through vertically one and breach one is uniformly distributed circumferentially, one end of the described relative spool of valve gap has the breach two identical with breach one shape, and described breach one and breach two stagger mutually, between above-mentioned valve gap and valve body, also have and can make spool along the axial rectilinear translation of valve body and spool be played to the buffer structure of buffer function.

When this safety check is not worked, spool one end is resisted against on valve gap, makes breach one and breach two all in closed condition.In the time that this safety check is worked, the water intake of water from valve gap flows into, water impact is to spool, make spool under the effect of buffer structure along the axial rectilinear translation of valve body, breach one and breach two are opened, and current flow through breach one and breach two process valve body, and the water outlet from valve body flows out, and under the effect of buffer structure, avoid water impact on spool, to cause spool and valve inner equipment to collide.

In above-mentioned safety check, described buffer structure comprises the valve rod of the one end that is connected in the relative spool of valve gap, is radially connected in the positioning rod in valve body and the spring between spool and positioning rod, described positioning rod has the through hole one running through vertically between above-mentioned spool and water outlet and on positioning rod, described spring one end is resisted against on spool, the other end is resisted against on positioning rod, and described valve rod passes spring and is connected in above-mentioned through hole one.

When this safety check is not worked, spool is resisted against on valve gap end face under the effect of spring, makes breach one and breach two in closed condition; When work, current enter and impact spool from water intake, and in the time that hydraulic pressure is greater than spring to the elastic force of spool, spool is along the axial rectilinear translation of valve body, breach one and breach two are opened, and current flow through breach one and breach two process valve body, and the water outlet from valve body flows out, now, spring is in compressive state; When occurring refluence phenomenon, the water slug of refluence, on spool, adds the elastic force of upper spring to spool, and spool is moved to valve gap direction, and breach one and breach two are closed, and now, spring restores to the original state; And the spring between spool and positioning rod can play buffer function to spool, avoid spool under the impact of current, collide with positioning rod, cause spool or positioning rod to damage, the working life of having improved this safety check.

In above-mentioned safety check, the center line of described valve rod and the centerline collineation of above-mentioned spool.The center line of valve rod and the centerline collineation of spool, i.e. the equal conllinear of center line of valve rod, spool, water outlet, spring and through hole one, valve rod through the center of spool and with through hole one clamping.

In above-mentioned safety check, one end of the described relative spool of valve gap is fixed with connecting rod, described spool has the annular joint of protrusion near the center of one end of valve body, described annular joint has the through hole two running through vertically, described buffer structure comprises the projection in through hole two on the guiding groove in connecting rod outside and annular joint, and above-mentioned projection is resisted against in guiding groove on diapire.

When valve gap is threaded connection on valve body, valve rod is through the annular joint on spool and spool, and now, the projection on annular joint is resisted against on the interior diapire of guiding groove of valve rod one side, and projection can be slided in guiding groove.In the time that this safety check is worked, current enter and impact on spool from water intake, in the time that hydraulic pressure is greater than the frictional force between projection and guiding groove, make spool along stem shaft to rectilinear translation, breach one and breach two are opened, and current flow through breach one and breach two process valve body; In the time occurring flowing backwards, thereby can moving band movable valve plug towards valve gap direction, projection is resisted against on valve gap, breach one and breach two are closed.

In above-mentioned safety check, described valve rod passes above-mentioned annular joint and is connected with nut thread.

In above-mentioned safety check, in described valve gap, also there is filter screen.Filter screen is positioned at valve gap, be that then water enter in valve body through filter screen, by filter screen is housed in valve gap, by the contaminant filter in water, avoid impurity to stop up breach one and breach two, affect the normal work of safety check, and can make the water that flows out valve body become totally, and facilitate the replacing of filter screen.

In above-mentioned safety check, described filter screen is cylindric, and the outer wall of filter screen and the inwall of above-mentioned valve gap lean.Adopt filter screen cylindraceous, lengthening water is with the time of contact of filter screen, and the outer wall of filter screen and the inwall of valve gap lean simultaneously, by clean the contaminant filter in water.

In above-mentioned safety check, between described spool and valve body, be provided with pad.Between spool and valve body, pad is set, spool is carried out radially spacing, make spool under the impact of current more stably along the axial rectilinear translation of valve body.

In above-mentioned safety check, described positioning rod and valve body are an entirety.

In above-mentioned safety check, being shaped as of described breach one is fan-shaped.Because breach two is identical with the shape of breach one, the shape of breach two is also fan-shaped.

Compared with prior art, this safety check has the following advantages:

Thereby the keying of 1, controlling breach one and breach two by the change in location between spool and valve gap realizes the function of this safety check, has advantages of simple in structure.

2, by being provided with damping mechanism in spool one end, prevent that spool from bumping with safety check internal unit under the impact of current, and damping mechanism is valve rod, positioning rod and spring or guiding groove and projection, avoid making specific positioning seat spool has been installed, have advantages of simple in structure.

3,, by arranging and be filter screen cylindraceous, in better impurity screening, facilitated the replacing of filter screen in valve gap.

Brief description of the drawings

Fig. 1 is the schematic diagram such as geodesic structure such as axle such as grade of this safety check.

Fig. 2 is the blast structural representation of safety check in embodiment one.

Fig. 3 is that the A-A of safety check in embodiment one cuts open structural representation.

Fig. 4 is the right TV structure schematic diagram of safety check in embodiment one.

Fig. 5 is the blast structural representation of safety check in embodiment two.

Fig. 6 is the structural representation of the spool of safety check in embodiment two.

In figure, 1, valve body; 1a, water outlet; Positioning rod 1b; Through hole one 1b1; 2, valve gap; 2a, water intake; 2b, breach two; 3, filter screen; 4, spool; 4a, breach one; 4b, annular joint; 4b1, projection; 5, spring; 6, pad; 7, valve rod; 8, connecting rod; 8a, guiding groove.

Embodiment

Be below specific embodiment of the utility model by reference to the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiments.

Embodiment one

As shown in Figure 1, Figure 2 and Figure 3, this safety check comprises the valve gap 2 that has the valve body 1 of cavity and be threaded with valve body 1, in the present embodiment, valve body 1 and valve gap 2 are all tubbiness, and the end of valve body 1 and valve gap 2 forms respectively mouth of a river 1a and water intake 2a, be that water intake 2a is positioned at valve gap 2 one end, water outlet 1a is positioned at valve body 1 one end.Filter screen 3 is housed in valve gap 2, and specifically, filter screen 3 is cylindric, and the inwall of the outer wall of filter screen 3 and valve gap 2 leans, and is used for lengthening the time of contact of water with filter screen 3, improves the effect of impurity screening.

In valve body 1, be provided with spool 4, and the centerline collineation of spool 4, water outlet 2a and water intake 1a.Spool 4 is round pie, and on spool 4, has the some breach running through vertically one 4a and breach one 4a is uniformly distributed circumferentially.Valve gap 2 has breach two 2bs identical with breach one 4a shape with respect to one end of spool 4, and staggers mutually in the position of breach one 4a and breach two 2b.In the present embodiment, being shaped as of breach one 4a is fan-shaped, and the shape of breach two 2b is also fan-shaped.In the time that this safety check is not worked, spool 4 one end are resisted against on valve gap 2, make breach one 4a and breach two 2b all in closed condition.In the time that this safety check is worked, the water intake 2a of water from valve gap 2 flows into, water impact is to spool 4, make spool 4 under the effect of buffer structure along the axial rectilinear translation of valve body 1, breach one 4a and breach two 2b are opened, current flow through breach one 4a and breach two 2b process valve body 1, and the water outlet 2a from valve body 1 flows out.

As shown in Figures 1 to 4, buffer structure comprises positioning rod 1b, valve rod 7 and spring 5.Wherein, positioning rod 1b is radially connected in valve body 1 and between spool 4 and water outlet 1a, and positioning rod 1b middle part has through hole one 1b1 running through vertically.Between spool 4 and positioning rod 1b, be provided with spring 5, and spring 5 one end are resisted against on spool 4 centers, it is upper that the other end is resisted against positioning rod 1b, and under the effect of spring 5, spool 4 has the trend being resisted against on valve gap 2.Valve rod 7 is connected in valve gap 2 one end with respect to spool 4, and in the time that valve rod 7 is threaded on valve body 1, valve rod 7 through spool 4 centers, spring 5 and with through hole one 1b1 clamping, be the equal conllinear of center line of valve rod 7, spool 4, water outlet 1a, spring 5 and through hole one 1b1, spring 5 is set on valve rod 7.

In this safety check, between spool 4 and valve body 1, be also provided with pad 6, spool 4 is carried out radially spacing, make spool 4 under the impact of current more stably along the axial rectilinear translation of valve body 1.

When this safety check is not worked, spool 4 is resisted against on valve gap 2 end faces under the effect of spring 5, makes breach one 4a and breach two 2b in closed condition; When work, the water intake 2a of water from valve gap 2 flows into, water impact is to spool 4, in the time that hydraulic pressure is greater than spring 5 to the elastic force of spool 4, spool 4 moves along valve rod 7 axial direct alignment water outlet 1a, and breach one 4a and breach two 2b open, and the water outlet 1a that water enters in valve body 1 and from valve body 1 flows out, now, spring 5 is in compressive state; In the time there is refluence phenomenon, the water slug of flowing backwards is on spool 4, add the elastic force of upper spring 5 to spool 4, spool 4 is moved to valve gap 2 directions, now spring 5 will restore to the original state, make spool 4 move and be resisted against on valve gap 2 end faces along valve rod 7 axial direct alignment water intake 1a, breach one 4a and breach two 2b are closed.

Embodiment two

As shown in Figure 5, Figure 6, the present embodiment is basic identical with embodiment one structure and principle, difference is: in the present embodiment, spool 4 has the annular joint 4b of protrusion near the center of one end of valve body 1, annular joint 4b has the through hole two running through vertically, in through hole two, there is protruding 4b1, one end of valve gap 2 relative spools 4 is fixed with connecting rod 8, and connecting rod 8 one sides have guiding groove 8a, and wherein buffer structure comprises guiding groove 8a and protruding 4b1.When valve gap 2 is threaded connection on valve body 1, connecting rod 8 through spool 4 with annular joint 4b on spool 4 and be connected with a nut thread, now, the protruding 4b1 on annular joint 4a is resisted against on the interior diapire of guiding groove 8a, and protruding 4b1 can slide in guiding groove 8a.In the time that this safety check is worked, current enter and impact on spool 4 from water intake 2a, in the time that hydraulic pressure is greater than the frictional force between protruding 4b1 and guiding groove 8a, make spool 4 along the axial rectilinear translation of connecting rod 8, breach one and breach two are opened, and current flow through breach one and breach two process valve body 1; In the time occurring flowing backwards, thereby can moving band movable valve plug 4 towards valve gap 2 directions, protruding 4b1 is resisted against on valve gap 2, breach one and breach two are closed.

Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various amendments or supplements or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.

Wait term although more used herein, do not get rid of the possibility that uses other term.Use these terms to be only used to describe more easily and explain essence of the present utility model; They are construed to any additional restriction is all contrary with the utility model spirit.

Claims

1. a safety check, comprise the valve body (1) with cavity, described valve body (1) valve gap (2) that has been threaded, and the end of valve body (1) and valve gap (2) forms respectively the mouth of a river (1a) and water intake (2a), in described valve body (1), be provided with spool (4), described water intake (2a), the centerline collineation of water outlet (1a) and spool (4), it is characterized in that, described spool (4) is round pie, on described spool (4), there are some breach that run through vertically (4a) and breach one (4a) is uniformly distributed circumferentially, described valve gap (2) relatively one end of spool (4) has the breach two (2b) identical with breach one (4a) shape, and described breach one (4a) and breach two (2b) stagger mutually, between above-mentioned valve gap (2) and valve body (1), also have and can make spool (4) along axially rectilinear translation and spool (4) is played to the buffer structure of buffer function of valve body (1).

2. safety check according to claim 1, it is characterized in that, described buffer structure comprises the valve rod (7) of the one end that is connected in the relative spool (4) of valve gap (2), radially be connected in the positioning rod (1b) in valve body (1) and be positioned at spool (4) and positioning rod (1b) between spring (5), described positioning rod (1b) is positioned at and between above-mentioned spool (4) and water outlet (1a) and on positioning rod (1b), has the through hole one (1b1) running through vertically, described spring (5) one end is resisted against on spool (4), the other end is resisted against on positioning rod (1b), described valve rod (7) passes spring (5) and is connected in above-mentioned through hole one (1b1).

3. safety check according to claim 2, is characterized in that, the center line of described valve rod (7) and the centerline collineation of above-mentioned spool (4).

4. safety check according to claim 1, it is characterized in that, described valve gap (2) relatively one end of spool (4) is fixed with connecting rod (8), described spool (4) has the annular joint (4b) of protrusion near the center of one end of valve body (1), described annular joint (4b) has the through hole two running through vertically, described buffer structure comprises the projection (4b1) in guiding groove (8a) and the upper through hole two of annular joint (4b) outside connecting rod (8), and above-mentioned projection (4b1) is resisted against on the interior diapire of guiding groove (8a).

5. safety check according to claim 4, is characterized in that, described valve rod (7) passes above-mentioned annular joint (4b) and is connected with nut thread.

6. according to the safety check described in claim 1 or 2 or 3 or 4 or 5, it is characterized in that also thering is filter screen (3) in described valve gap (2).

7. safety check according to claim 6, is characterized in that, described filter screen (3) is cylindric, and the inwall of the outer wall of filter screen (3) and above-mentioned valve gap (2) leans.

8. according to the safety check described in claim 1 or 2 or 3 or 4 or 5, it is characterized in that, between described spool (4) and valve body (1), be provided with pad (6).

9. according to the safety check described in claim 1 or 2 or 3, it is characterized in that, described positioning rod (1b) is an entirety with valve body (1).

10. according to the safety check described in claim 1 or 2 or 3 or 4 or 5, it is characterized in that, being shaped as of described breach one (4a) is fan-shaped.