CN213982157U

CN213982157U - Anti-backflow filter valve

Info

Publication number: CN213982157U
Application number: CN202023083410.7U
Authority: CN
Inventors: 陈金明
Original assignee: Zhejiang Crown Industrial Co ltd
Current assignee: Zhejiang Crown Industrial Co ltd
Priority date: 2020-12-18
Filing date: 2020-12-18
Publication date: 2021-08-17
Anticipated expiration: 2030-12-18

Abstract

The utility model provides a prevent flowing backwards strainer valve belongs to valve technical field. It has solved the comparatively inconvenient problem of current strainer valve change filter screen operation. The backflow-preventing filter valve comprises a valve body with an inlet and an outlet, wherein a filter screen is detachably fixed in the valve body, a flow passage is arranged in the valve body, the flow passage sequentially penetrates through the end part of one end of the filter screen and the side part of the filter screen from the inlet to the outlet, the valve body is positioned on the inner wall between the filter screen and the outlet and is provided with a convex shoulder which protrudes inwards and is in a ring shape, a valve core, a spring and a support are further arranged in the valve body between the convex shoulder and the outlet, the support is fixed with the valve body, one end of the spring is abutted against the support, the other end of the spring is abutted against the valve core, and the valve core is abutted against the convex shoulder and blocks the flow passage under the elastic action of the spring. This anti-backflow filtering valve has the more convenient advantage of operation.

Description

Anti-backflow filter valve

Technical Field

The utility model belongs to the technical field of the valve, a prevent backflow strainer valve is related to.

Background

The valve is a component which is widely used in various pipeline systems at present and is used for opening and closing the pipeline or regulating the flow of the pipeline. According to its function, there are classified into a shut-off valve, a check valve, a regulating valve, and the like.

Among them, the filtration valve, also called filter, is a filtration pretreatment device that is necessary for the use of hydraulic control valves and precision mechanical products that are easily clogged. The existing filter valve usually adopts a filter screen to filter solid impurities in a conveying medium, and the influence caused by conveying the impurities to a using device is avoided. After long-term use, the filter screen needs to be detached for cleaning or replacement to ensure the filtering effect of the filter valve.

However, the filter valve itself does not have the function of shutting off the pipeline, and when the filter screen is replaced, the main valves at the two ends of the pipeline are often required to be respectively closed to disassemble the filter screen, so that the operation is inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned problem that prior art exists, provide a prevent filter valve that flows backwards, solved current filter valve and changed the comparatively inconvenient problem of filter screen operation.

The purpose of the utility model can be realized by the following technical proposal:

the backflow-preventing filter valve comprises a valve body with an inlet and an outlet, wherein a filter screen is detachably fixed in the valve body, a flow passage is arranged in the valve body, and the flow passage sequentially penetrates through the end part of one end of the filter screen and the side part of the filter screen from the inlet to the outlet.

When the backflow-preventing filter valve does not convey media, the valve core abuts against the convex shoulder under the elastic force of the spring and blocks the overflowing channel, and when the media at the outlet exerts acting force on the valve core, the valve core can abut against the convex shoulder more tightly, so that the media backflow is avoided. When the filter screen is detached, an operator can detach the filter screen by only closing the pipeline valve on one side of the inlet of the filter valve without closing the valve on one side of the outlet of the filter screen, so that the operation is more convenient.

In the backflow-preventing filter valve, the valve body comprises a main body and a circular nut which is in threaded connection with the water outlet end of the main body, and the support is fixed in the nut.

In foretell anti-backflow filtering valve, the support is including being the annular lantern ring and following the several branch of the radial setting of lantern ring, several branch around the axis equipartition of lantern ring, the one end of several branch all with the lateral surface of lantern ring is fixed, the other end all with the nut is inboard fixed.

In foretell anti-backflow filtering valve, the case is including being flat discoid sealing and being the shaft-like portion of wearing to establish, wear to establish the portion and wear to establish in the cover intra-annular, and wear to establish the one end of portion with sealing one end is fixed, the other end of sealing is provided with sealed the pad, the spring housing is established wear to establish the portion outside, and the one end of spring supports and leans on the support, and the other end supports and leans on in the sealing.

In foretell anti-backflow filtering valve, the one end that the portion of wearing to establish was kept away from to the sealing has axial protrusion to be cylindric projection, sealed pad is ring shape and cover and establishes the projection outside, the one end outside of keeping away from the sealing on the projection has the protrusion to be the spacing portion of ring shape, sealed pad can support and lean on in the spacing portion.

In foretell anti-backflow strainer valve, the valve body lateral part has the protrusion to be cylindric neck, the filter screen is cylindric and wears to establish in the neck, the inboard threaded connection in outer end of neck has the end cover, the outer end of filter screen can support and lean on the end cover.

In the above-described backflow prevention filter valve, a sealing member is compressed between the end cap and the end portion of the outer end of the neck portion.

Compared with the prior art, this prevent flowing backwards strainer valve sets up case and spring being close to valve body exit for this strainer valve can effectively prevent the medium refluence of exit, only needs to close the valve of import one side when then changing the filter screen, need not to close the valve of export one side, and it is more convenient to operate.

Drawings

FIG. 1 is a schematic cross-sectional view of the anti-backflow filter valve.

In the figure, 1, inlet; 2. an outlet; 3. a valve body; 4. a filter screen; 5. a shoulder is formed; 6. a valve core; 7. a spring; 8. a support; 9. a nut; 10. a main body; 11. an end cap; 12. a sealing part; 13. a penetration part; 14. a gasket; 15. a convex column; 16. a limiting part; 17. a neck portion; 18. and a seal.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in figure 1, the backflow-preventing filter valve comprises a valve body 3 with an inlet 1 and an outlet 2, a protruding cylindrical neck 17 is arranged on the side of the valve body 3, the neck 17 is obliquely arranged, a filter screen 4 is cylindrical and penetrates through the neck 17, an end cover 11 is in threaded connection with the inner side of the outer end of the neck 17, the outer end of the filter screen 4 can abut against the end cover 11, and a sealing element 18 is tightly pressed between the end part of the outer end of the end cover 11 and the end part of the outer end of the neck 17. The valve body 3 has a flow passage therein, which passes through an end portion of one end of the filter net 4 and a side portion of the filter net 4 in order from the inlet 1 toward the outlet 2. In the present embodiment, the sealing member 18 is a sealing pad 14 having a circular ring shape.

The inner wall of the valve body 3 between the filter screen 4 and the outlet 2 is provided with a convex shoulder 5 which protrudes inwards and is in a circular ring shape, one end of the convex shoulder 5 facing the outlet 2 is provided with a protruding and circular ring-shaped abutting part, and a valve core 6, a spring 7 and a support 8 are further arranged in the valve body 3 between the convex shoulder 5 and the outlet 2.

Specifically, valve body 3 includes main part 10 and threaded connection and is the annular nut 9 in the main part 10 play water end, and support 8 is including being the annular lantern ring and along the several branch of the radial setting of lantern ring, several branch around the axis equipartition of lantern ring, and the one end of several branch all is fixed with the lateral surface of lantern ring, and the other end all is inboard fixed with nut 9. In the embodiment, the number of the struts is 2-6, preferably 3.

The valve core 6 comprises a flat disc-shaped sealing portion 12 and a straight rod-shaped penetrating portion 13, the penetrating portion 13 penetrates through the annular sleeve, the penetrating portion 13 and the sealing portion 12 are coaxially arranged, one end of the penetrating portion 13 is fixed to one end of the sealing portion 12, the other end of the sealing portion 12 is provided with a sealing gasket 14, the spring 7 is sleeved on the outer side of the penetrating portion 13, one end of the spring 7 abuts against the support 8, and the other end of the spring 7 abuts against the sealing portion 12. In this embodiment, the sealing portion 12 is kept away from the one end of wearing to establish portion 13 and is had axial protrusion and be cylindric projection 15, and sealed pad 14 is ring shape and overlaps and establish in the projection 15 outside, and the one end outside of keeping away from sealing portion 12 on the projection 15 has the protrusion to be the spacing portion 16 of ring shape, and sealed pad 14 can support and lean on spacing portion 16.

When the backflow-preventing filter valve does not convey media, the valve core 6 abuts against the abutting part of the convex shoulder 5 under the elastic force of the spring 7 and blocks the overflowing channel, and when the media at the outlet 2 exerts acting force on the valve core 6, the valve core 6 can abut against the convex shoulder 5 more tightly, so that the media are prevented from flowing backwards. When the filter screen 4 is removed, an operator can remove the filter screen 4 only by closing the pipeline valve on one side of the inlet 1 of the filter valve, and the valve on one side of the outlet 2 of the filter screen 4 is not required to be closed, so that the operation is more convenient.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The backflow-preventing filter valve comprises a valve body (3) with an inlet (1) and an outlet (2), wherein a filter screen (4) is detachably fixed in the valve body (3), a flow passage is arranged in the valve body (3), the flow passage sequentially penetrates through the end part of one end of the filter screen (4) and the side part of the filter screen (4) from the inlet (1) to the outlet (2), the backflow-preventing filter valve is characterized in that a convex shoulder (5) protruding inwards to form a circular ring shape is arranged on the inner wall of the valve body (3) between the filter screen (4) and the outlet (2), a valve core (6), a spring (7) and a support (8) are further arranged in the valve body (3) between the convex shoulder (5) and the outlet (2), the support (8) is fixed with the valve body (3), one end of the spring (7) is abutted against the support (8), and the other end of the spring (7) is abutted against the valve core (6), the valve core (6) is abutted against the shoulder (5) under the action of the elastic force of the spring (7) and blocks the overflowing channel.

2. The backflow-preventing filter valve according to claim 1, wherein the valve body (3) comprises a main body (10) and a circular nut (9) screwed into the water outlet end of the main body (10), and the support (8) is fixed in the nut (9).

3. The backflow-preventing filter valve according to claim 2, wherein the support (8) comprises a circular ring-shaped lantern ring and a plurality of support rods arranged along the radial direction of the lantern ring, the plurality of support rods are uniformly distributed around the axis of the lantern ring, one ends of the plurality of support rods are fixed with the outer side surface of the lantern ring, and the other ends of the plurality of support rods are fixed with the inner side of the screw cap (9).

4. The backflow-preventing filter valve according to claim 3, wherein the valve element (6) comprises a sealing portion (12) in the shape of a flat disk and a penetrating portion (13) in the shape of a rod, the penetrating portion (13) is penetrated in the collar, one end of the penetrating portion (13) is fixed with one end of the sealing portion (12), the other end of the sealing portion (12) is provided with a sealing gasket (14), the spring (7) is sleeved outside the penetrating portion (13), one end of the spring (7) abuts against the bracket (8), and the other end abuts against the sealing portion (12).

5. The backflow-preventing filter valve according to claim 4, wherein one end of the sealing portion (12) away from the penetrating portion (13) is provided with a cylindrical protruding column (15) protruding axially, the sealing gasket (14) is annular and sleeved outside the protruding column (15), one end of the protruding column (15) away from the sealing portion (12) is provided with a limiting portion (16) protruding in an annular shape, and the sealing gasket (14) can abut against the limiting portion (16).

6. The backflow-preventing filter valve according to any one of claims 1 to 5, wherein a protruding cylindrical neck portion (17) is arranged on a side portion of the valve body (3), the filter screen (4) is cylindrical and penetrates through the neck portion (17), an end cover (11) is connected to the inner side of the outer end of the neck portion (17) in a threaded manner, and the outer end of the filter screen (4) can abut against the end cover (11).

7. The backflow-preventing filtering valve as claimed in claim 6, characterized in that a seal (18) is compressed between said end cap (11) and the end of the outer end of the neck (17).