CN212564559U

CN212564559U - Reliably sealed check valve

Info

Publication number: CN212564559U
Application number: CN202020125977.7U
Authority: CN
Inventors: 袁剑; 何秋桔
Original assignee: Sichuan Scgute Valve Manufacturing Co ltd
Current assignee: Sichuan Scgute Valve Manufacturing Co ltd
Priority date: 2020-01-19
Filing date: 2020-01-19
Publication date: 2021-02-19
Anticipated expiration: 2030-01-19

Abstract

The utility model relates to a sealed reliable check valve, including valve body (1), disk seat (B) and valve gap (6), be equipped with valve clack (4) in valve gap (6), valve clack (4) axial displacement in valve gap (6), fixed seal gasket (2) that are provided with on disk seat (B). Tetrafluoro or rubber material is selected for use in seal gasket (2), adopts tetrafluoro or rubber circle as the main seal, and sealed specific pressure is little, and is sealed effectual, if seal gasket 2 has the damage, still can unpack apart the valve when overhauing and change seal gasket 2, still prolonged the life of valve when increasing sealed effect.

Description

Reliably sealed check valve

Technical Field

The utility model relates to a water treatment and air purification technical field particularly relate to a reliable and sealed check valve.

Background

In the design of check valves in the prior art, the valve seat seals have two modes: 1. the valve seat and the valve clack sealing surface of the valve body are made of body processing or surfacing alloy, namely the sealing pair is made of metal-to-metal; 2. one valve seat and the valve clack of the valve body adopts body processing or surfacing alloy, and the other valve seat and the valve clack adopt a tetrafluoro or rubber ring, namely, the sealing pair is a metal tetrafluoro or rubber ring.

The valve seat is sealed by adopting a metal Teflon or rubber ring, the sealing effect is good, but the Teflon or rubber ring is easy to age, so that the service life is short; the valve seat is sealed by metal to metal, so that the service life is long, but the sealing effect is poorer than that of metal to fluoroplastic.

For example, the chinese utility model patent of grant bulletin number CN 207018581U discloses a check valve, including valve body, case, spring and adjusting screw, case and spring are located in the valve body, it is sealed for the conical surface between case and the valve body, spring one end is pressed in adjusting screw, and the spring other end pushes up on the case, adjusting screw locate the exit of valve body and with valve body screw-thread fit, be equipped with axial medium through-hole in the adjusting screw. The conical surface sealing is adopted between the valve core and the valve body, so that the sealing surface is wider, and the sealing reliability of the check valve is improved; meanwhile, the supporting force of the spring to the valve core can be adjusted through the adjusting screw, and the service life of the valve is prolonged. However, the sealing effect is not good only by providing a conical surface seal.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical defects in the prior art, the utility model aims to provide a check valve with reliable sealing, which solves the problems that the sealing of the valve seat in the prior art adopts a metal pair of PTFE or a rubber ring, the sealing effect is good, but the service life is short because the PTFE or the rubber ring is easy to age; the valve seat is sealed by metal to metal, so that the service life is long, but the sealing effect is poorer than that of metal to fluoroplastic.

In order to solve the technical problem, the utility model discloses a scheme as follows:

a check valve reliable in sealing comprises a valve body, a valve seat and a valve cover, wherein a valve clack is arranged in the valve cover, the valve clack axially moves in the valve cover, and a sealing gasket is fixedly arranged on the valve seat. The sealing gasket chooses tetrafluoro or rubber material for use, adopts tetrafluoro or rubber circle as main seal, and sealed specific pressure is little, and is sealed effectual, if sealing gasket has the damage, still can unpack the valve when overhauing and change sealing gasket, still prolonged the life of valve when increasing sealed effect.

Preferably, the sealing gasket comprises an inner cylindrical surface, a left flat surface and a right flat surface; the valve body comprises an upper plane; the valve seat comprises an end surface and an outer cylindrical surface; the valve flap includes a valve flap left plane.

In any of the above aspects, preferably, a spring is provided between the valve flap and the valve cover.

In any of the above schemes, preferably, the outer circle of the valve flap is provided with a milling groove; a drilling hole is formed in the radial direction of the valve clack; the middle part of the valve clack is provided with a middle hole.

In any of the above embodiments, it is preferable that the milling flutes communicate with the intermediate bore and the bore. The medium in the valve flow passage can flow from one end to the other end through the intermediate hole. The left plane of the valve clack acted on by medium acting force pushes the valve clack to move axially to the right away from the right plane, and the valve is opened. When the medium flows backwards, the medium acting force and the spring acting force push the valve clack shaft to move leftwards, so that the left plane of the valve clack is tightly attached to the right plane, the valve is closed, and the medium is prevented from flowing backwards.

In any of the above embodiments, preferably, a seat is provided between the sealing gasket and the valve cover.

In any of the above schemes, preferably, the sealing gasket is an annular structural member, the inner cylindrical surface is matched with the outer cylindrical surface of the valve seat, the left plane is closely attached to the upper plane of the valve body for sealing, and the outer ring of the right plane is closely attached to the seat ring for sealing. The valve sealing is mainly completed by the sealing gasket, and when the sealing gasket is damaged, the end face on the valve seat can be sealed closely, so that the valve can continuously work, and the sealing performance is more reliable.

In any of the above schemes, preferably, the sealing gasket is made of tetrafluoro or rubber, a tetrafluoro or rubber ring is used as a main seal, the sealing specific pressure is low, the sealing effect is good, if the sealing gasket is damaged, the valve can be disassembled to replace the sealing gasket during maintenance, the sealing effect is improved, and meanwhile, the service life of the valve is prolonged.

Drawings

Fig. 1 is a schematic structural view of a preferred embodiment of a reliable sealing check valve according to the present invention.

Fig. 2 is an enlarged view of the preferred embodiment a of the reliable seal check valve of fig. 1 according to the present invention.

Fig. 3 is an exploded view of the preferred embodiment of the reliable seal check valve of fig. 1 according to the present invention.

Detailed Description

The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses. The following description will further describe embodiments of the reliable sealing check valve of the present invention with reference to the drawings.

As shown in fig. 1, the structure of a preferred embodiment of the check valve with reliable sealing according to the present invention is schematically illustrated. The utility model discloses a sealed reliable check valve, including valve body 1, disk seat B and valve gap 6, be equipped with valve clack 4 in the valve gap 6, valve clack 4 axial displacement in valve gap 6, the last fixed seal gasket 2 that is provided with of disk seat B. The sealing gasket 2 is made of tetrafluoro or rubber materials, a tetrafluoro or rubber ring is adopted as a main seal, the sealing specific pressure is small, the sealing effect is good, if the sealing gasket 2 is damaged, the valve can be disassembled to replace the sealing gasket 2 when the maintenance is carried out, and the service life of the valve is prolonged while the sealing effect is increased.

As shown in fig. 2 and 3, in the present embodiment, the sealing gasket 2 includes an inner cylindrical surface A3, a left plane a5 and a right plane a 6; the valve body 1 comprises an upper plane a 4; the valve seat B comprises an end surface A1 and an outer cylindrical surface A2; the flap 4 includes a flap left plane a 7.

In the present embodiment, a spring 5 is provided between the valve flap 4 and the valve cover 6.

In the embodiment, the outer circle of the valve flap 4 is provided with a milling groove 41; the valve clack 4 is provided with a drilling hole 43 in the radial direction; the middle part of the valve clack 4 is provided with a middle hole 42.

In the present exemplary embodiment, the milling flutes 41 communicate with the central bore 42 and the bore 43. The medium in the valve flow path may flow from one end to the other through the intermediate aperture 42. The valve is opened by the medium acting on the left plane A7 of the valve flap 4 pushing the valve flap 4 to move axially to the right away from the right plane A6. When the medium flows backwards, the medium acting force and the spring 5 acting force push the valve clack 4 to move leftwards, so that the valve clack left plane A7 of the valve clack 4 is attached to the right plane A6, the valve is closed, and the medium is prevented from flowing backwards.

In this embodiment, a seat 3 is provided between the sealing gasket 2 and the valve cover 6.

In this embodiment, the sealing gasket 2 is an annular structural member, the inner cylindrical surface A3 is matched with the outer cylindrical surface a2 of the valve seat B, the left plane a5 is tightly sealed with the upper plane a4 of the valve body 1, and the outer ring of the right plane a6 is tightly sealed with the seat ring 3. The valve sealing is mainly completed by the sealing gasket 2, when the sealing gasket 2 is damaged, the end face A1 on the valve seat B can be sealed immediately, so that the valve can continuously work, and the sealing performance is more reliable.

In this embodiment, tetrafluoro or rubber are selected for use to seal gasket 2's material, adopt tetrafluoro or rubber circle as main seal, and sealed specific pressure is little, and is sealed effectual, if seal gasket 2 has the damage, still can unpack apart the valve when overhauing and change seal gasket 2, still prolonged the life of valve when increasing sealed effect.

It will be understood by those skilled in the art that the reliable seal check valve of the present invention includes any combination of the parts described herein. These combinations are not described in detail herein for the sake of brevity and clarity, but the scope of the invention, which is defined by any combination of parts or features disclosed herein, will become apparent after a review of this specification.

Claims

1. The utility model provides a sealed reliable check valve, includes valve body (1), disk seat (B) and valve gap (6), is equipped with valve clack (4) in valve gap (6), and valve clack (4) are axial displacement in valve gap (6), its characterized in that: the valve seat (B) is fixedly provided with a sealing gasket (2), and the sealing gasket (2) is made of tetrafluoro or rubber materials.

2. The reliable seal check valve of claim 1, wherein: the sealing gasket (2) comprises an inner cylindrical surface (A3), a left plane (A5) and a right plane (A6); the valve body (1) comprises an upper plane (A4); the valve seat (B) comprises an end face (A1) and an outer cylindrical face (A2); the valve flap (4) comprises a flap left plane (A7).

3. The reliable seal check valve of claim 1, wherein: a spring (5) is arranged between the valve clack (4) and the valve cover (6).

4. The reliable seal check valve of claim 1, wherein: the excircle of the valve flap (4) is provided with a milling groove (41); a drilling hole (43) is formed in the radial direction of the valve clack (4); the middle part of the valve flap (4) is provided with a middle hole (42).

5. The reliable seal check valve of claim 4, wherein: the milling groove (41) is communicated with the middle hole (42) and the drilling hole (43).

6. The reliable seal check valve of claim 1, wherein: a seat ring (3) is arranged between the sealing gasket (2) and the valve cover (6).

7. The reliable seal check valve of claim 2, wherein: the sealing gasket (2) is an annular structural member, an inner cylindrical surface (A3) is matched with an outer cylindrical surface (A2) of the valve seat (B), a left plane (A5) is tightly attached and sealed with an upper plane (A4) of the valve body (1), and an outer ring of a right plane (A6) is tightly attached and sealed with the seat ring (3).

8. The reliable seal check valve of any of claims 1 or 2 or 7, wherein: the sealing gasket (2) is made of tetrafluoro or rubber, and a tetrafluoro or rubber ring is used as a main seal.