CN212297780U

CN212297780U - Check valve

Info

Publication number: CN212297780U
Application number: CN202021649999.XU
Authority: CN
Inventors: 周益斌; 郭海锋; 杨明浩; 赵文泉; 冯天卿; 王丹
Original assignee: Zhihe Environment Technology Jiangsu Co ltd
Current assignee: Zhihe Environment Technology Jiangsu Co ltd
Priority date: 2020-08-10
Filing date: 2020-08-10
Publication date: 2021-01-05
Anticipated expiration: 2030-08-10

Abstract

The utility model discloses a check valve, which comprises a valve body, the entrance point and the exit end of valve body are respectively along radial inward welding separately has the first ring baffle of assorted, the second ring baffle, be equipped with clearance fit's elbow in the valve body, the entrance point cover of elbow is established on the inner ring of first ring baffle, form 20-25 contained angle between the exit end of elbow and the first ring baffle, and the cover is equipped with assorted silica gel circle on it, the valve rod is installed to the valve body internal rotation, be connected with on the valve rod with the inner wall clearance fit of valve body and be used for opening and close the blade of the exit end of elbow, the blade is the pot cover form, and it be equipped with on the face of opening and close the exit end of elbow with silica gel. The utility model provides a how to make the check valve be suitable for perpendicular installation and horizontal installation simultaneously to make the technical problem that its seal can improve, have that the seal is good, installation application scope is big and the commonality is strong advantage such as.

Description

Check valve

Technical Field

The utility model relates to the technical field of valves, concretely relates to check valve.

Background

Check valves are a common type of valve used in industrial exhaust. The mode that present check valve all adopted the shelves strip of blade overlap joint on the internal perisporium of valve body to realize airtight, and is obvious, and this not only makes the check valve can only realize single vertical installation or horizontal installation, leads to installation application scope little, and because lapped impact force can make blade and shelves strip produce the microdeformation moreover, and in order to guarantee that the blade can normally rotate, leaves the clearance between the internal perisporium of blade and valve body, so lead to the leakproofness poor.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a check valve to it is good to reach the seal, and installation application scope is big, and the purpose that the commonality is strong.

In order to solve the technical problem, the utility model provides a check valve, which comprises a valve body, the entrance point and the exit end of valve body are respectively along radial inward welding separately have first ring baffle of assorted, second ring baffle, be equipped with clearance fit's elbow in the valve body, the entrance point cover of elbow is established on the inner ring of first ring baffle, the exit end of elbow with form 20-25 contained angle between the first ring baffle, and the cover is equipped with assorted silica gel circle on it, the valve rod is installed to the valve body internal rotation, be connected with on the valve rod with the inner wall clearance fit of valve body just is used for opening and close the blade of the exit end of elbow, the blade is the pot cover form, and it is opening and close be equipped with on the face of the exit end of valve body with silica gel circle assorted recess.

In a preferred embodiment of the present invention, both ends of the valve rod extend out of the valve body, and one end of the valve rod is connected with a driving device in a transmission manner.

In a preferred embodiment of the present invention, the driving device is a servo motor or a gas actuator.

In a preferred embodiment of the present invention, the valve rod is sleeved with a pair of linkage strips symmetrically disposed about a middle portion thereof, the other end of the linkage strips is commonly connected with a linkage plate, and the linkage plate is detachably mounted on a middle portion of a deviation surface of the outlet end of the elbow, wherein the blade opens and closes the outlet end of the elbow.

In a preferred embodiment of the present invention, the blade opens and closes a back surface of the outlet end of the elbow and the linkage plate is connected by screw threads.

In a preferred embodiment of the present invention, the linkage bars are all sleeved on the valve rod through a brass bushing.

In a preferred embodiment of the present invention, the first annular baffle is welded with a first flange surrounding its inner ring on the surface deviating from the valve body, and the second annular baffle is welded with a second flange surrounding its inner ring on the surface deviating from the valve body.

In a preferred embodiment of the invention, the edge of the blade is coated with a sealing strip.

In a preferred embodiment of the present invention, the sealing strip is composed of a graphite core and a stainless steel net covering the graphite core.

In a preferred embodiment of the present invention, the valve body has an elliptical cross-section and is made of stainless steel.

The utility model has the advantages that: an elbow in clearance fit is arranged in the valve body, the inlet end of the elbow is communicated with the inlet end of the valve body, an included angle of 20-25 degrees is formed between the outlet end of the elbow and the inlet end of the valve body, and a matched silica gel ring is sleeved on the elbow; and the opening and closing surface of the outlet end blade for opening and closing the elbow is provided with a groove matched with the silica gel ring, so that the blade is completely covered on the outlet end of the elbow at an angle of 20-25 degrees in the valve body, and the silica gel ring is embedded into the groove on the blade, thereby realizing the technical effects of enabling the check valve to be suitable for vertical installation and horizontal installation at the same time and improving the sealing performance. Compared with the prior art, the air-tightness is good, the installation and application range is wide, and the universality is strong.

Drawings

Fig. 1 is a schematic view of the present invention;

FIG. 2 is a schematic view of the present invention with the valve body removed;

fig. 3 is an exploded view of the present invention;

the reference numbers in the figures illustrate: 1. the valve comprises a valve body, 2, a first annular baffle, 3, a second annular baffle, 4, an elbow, 5, a silica gel ring, 6, a valve rod, 7, a blade, 71, a groove, 8, a linkage strip, 9, a linkage plate, 10, a brass shaft sleeve, 11, a first flange, 12 and a second flange.

Detailed Description

The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.

Referring to fig. 1, 2 and 3: a check valve comprises a valve body 1, wherein the cross section of the valve body 1 is elliptical in the embodiment, and the valve body is made of stainless steel materials. The inlet end and the outlet end of the valve body 1 are respectively welded with a first annular baffle 2 and a second annular baffle 3 which are matched with each other along the radial direction inwards, an elbow 4 with clearance fit is arranged in the valve body 1, the inlet end of the elbow 4 is covered on the inner ring of the first annular baffle 2, an included angle of 20-25 degrees is formed between the outlet end of the elbow 4 and the first annular baffle 2, a matched silica gel ring 5 is sleeved on the elbow 4, a valve rod 6 is rotatably arranged in the valve body 1, and the valve rod 6 is connected with a blade 7 which is in clearance fit with the inner wall of the valve body 1 and is used for opening and closing the outlet end of the elbow 4, wherein in one embodiment of the utility model, the blade 7 realizes the opening and closing of the outlet end; the utility model discloses a further embodiment, blade 7 is realized opening and close to the exit end of elbow 4 under the drive of valve rod 6, specifically is that valve body 1 all stretches out at the both ends of valve rod 6, and one end transmission wherein is connected with drive arrangement, and drive arrangement is servo motor or gas actuator. The blade 7 is in a pot cover shape, and a groove 71 matched with the silica gel ring 5 is arranged on the surface of the outlet end of the opening and closing elbow 4. The utility model discloses in, because blade 7 is the pot cover form and clearance fit is located valve body 1 to with the angle closure of slope 20-25 on the exit end of elbow 4, the silica gel circle 5 of suit on the exit end of elbow 4 imbeds in the recess 71 of blade 7 in the closed process, so realized making the check valve be suitable for vertical installation and horizontal installation simultaneously, and made the technological effect that its leakproofness can improve.

The utility model discloses a preferred embodiment, the cover is equipped with a pair of linkage strip 8 about its middle part symmetry sets up on valve rod 6, and the linkage strip 8 other end is connected with linkage plate 9 jointly, and linkage plate 9 detachably installs at the middle part of the back of the body of blade 7 the exit end of opening and close elbow 4, and the back of the body of the exit end of blade 7 the opening and close elbow 4 is from face and linkage plate 9 threaded connection, has set up like this and has not only prolonged the life of blade 7, has guaranteed the stability of blade 7 operation moreover.

In a preferred embodiment of the present invention, the linkage bar 8 is sleeved on the valve rod 6 through a brass bushing 10, so that the friction between the valve rod 6 and the linkage bar 8 is effectively reduced, and the service life of the two is effectively prolonged.

In a preferred embodiment of the present invention, the first ring baffle 2 is welded with the first flange 11 surrounding its inner ring on the surface deviating from the valve body 1, and the second ring baffle 3 is welded with the second flange 12 surrounding its inner ring on the surface deviating from the valve body 1, so as to facilitate installation of the check valve.

In a preferred embodiment of the present invention, the edge of the blade 7 is wrapped with a sealing strip, which is composed of a graphite core and a stainless steel mesh wrapped on the graphite core, so that the sealing performance is further improved.

To sum up, the utility model has the advantages that the elbow 4 with clearance fit is arranged in the valve body 1, the inlet end of the elbow 4 is communicated with the inlet end of the valve body 1, an included angle of 20-25 degrees is formed between the outlet end of the elbow 4 and the inlet end of the valve body 1, and the matched silica gel ring 5 is sleeved on the elbow 4; and through be equipped with on the face of opening and close that is used for opening and close the exit end blade 7 of elbow 4 with 5 assorted recesses 71 of silica gel circle to make blade 7 be 20-25 angle in valve body 1 and cover completely on the exit end of elbow 4, and silica gel circle 5 imbeds in the recess 71 on the blade 7, so the utility model discloses can be suitable for perpendicular installation and horizontal installation simultaneously, and the seal can improve, have that installation application scope is big, the seal is good and advantages such as the commonality is strong.

The above embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.

Claims

1. The utility model provides a check valve, its characterized in that, includes the valve body, the inlet end and the exit end of valve body have first annular baffle of assorted, second annular baffle along respectively radial inward welding, be equipped with clearance fit's elbow in the valve body, the inlet end cover of elbow is established on the inner ring of first annular baffle, the outlet end of elbow with form 20-25 contained angle between the first annular baffle, and the cover is equipped with assorted silica gel circle on it, the valve rod is installed to the valve body internal rotation, be connected with on the valve rod with the inner wall clearance fit of valve body just is used for opening and close the blade of the outlet end of elbow, the blade is the pot cover form, and its be equipped with on the face of opening and close the outlet end of elbow with silica gel circle assorted recess.

2. The check valve of claim 1, wherein both ends of said valve stem extend out of said valve body, and wherein one end is drivingly connected to a drive means.

3. The check valve of claim 2, wherein the drive means is a servo motor or a gas actuator.

4. The check valve as claimed in claim 1, wherein the valve rod is sleeved with a pair of linkage bars symmetrically arranged about a middle portion thereof, the other ends of the linkage bars are commonly connected with a linkage plate, and the linkage plate is detachably mounted at a middle portion of a surface of the blade, which deviates from an outlet end of the elbow.

5. The check valve of claim 4, wherein said vane opens and closes a back-facing surface of the outlet end of said elbow and said linkage plate is threadably connected.

6. The check valve of claim 4 wherein said linkage bars are each mounted on said valve stem by a brass bushing.

7. The check valve of claim 1, wherein said first annular flap has a first flange welded to a face thereof facing away from said valve body and having an inner ring disposed therearound, and said second annular flap has a second flange welded to a face thereof facing away from said valve body and having an inner ring disposed therearound.

8. The check valve of claim 1, wherein the edges of the vanes are coated with a sealing strip.

9. The check valve of claim 8, wherein the seal consists of a graphite core and a stainless steel mesh wrapped around the graphite core.

10. The check valve of claim 1, wherein the valve body is elliptical in cross-section and is made of a stainless steel material.