CN207093860U - A kind of integral type flap swing-type flange check valve - Google Patents

Abstract

The utility model relates to an integral disc swing flange check valve. An integrated disc swing flange check valve, including a valve body, a valve cover, a valve disc and a rocker, a valve cavity is provided inside the valve body, and fluid inlets and Fluid outlet, the top of the valve body is provided with a top opening, the valve cover is closed on the top opening, one end of the rocker is rotatably connected to the inner wall of the valve cavity, and the other end is connected to the valve clack. It is characterized in that the valve cover is provided with a connecting part , the connecting part is provided with external threads, the inner wall of the top opening of the valve body is provided with internal threads, the valve body and the valve cover are connected by thread rotation, and the upper ring of the plane close to the top end surface of the valve body on the valve cover is provided with grooves, The groove is embedded with an O-ring, and the end of the fluid inlet close to the valve cavity is provided with a valve seat seal. When the valve disc closes the fluid inlet, it is in close contact with the valve seat seal. The valve disc and the rocker are integrally formed. The utility model has the advantages of simple structure, convenient use, good sealing effect and low production cost.

Description

An integrated disc swing flange check valve

technical field

The utility model relates to the technical field of valves, in particular to an integral disc swing flange check valve.

Background technique

Swing check valves are widely used in pipelines in metallurgy, chemical industry, electric power industry, urban water supply and drainage and other industries to prevent medium backflow and are one of the most widely used valves in various fluid transportation projects. The existing swing check valve disc requires high processing precision, many parts and complex structure, which makes the production cost high.

Utility model content

In order to overcome at least one defect in the above-mentioned prior art, the utility model provides an integral disc swing flange check valve. The utility model has the advantages of simple structure, convenient use, good sealing effect and low production cost.

In order to solve the above-mentioned technical problems, the technical solution adopted by the utility model is: an integral flap swing flange check valve, including a valve body, a valve cover, a valve flap and a rocker. A valve chamber, two ends of the valve body are provided with a fluid inlet and a fluid outlet communicating with the valve chamber, the top of the valve body is provided with a top opening, the valve cover is closed on the top opening, and one end of the rocker The rotation is connected to the inner wall of the valve cavity, and the other end is connected to the valve disc, so that the valve disc can rotate around the connection point between the rocker and the inner wall of the valve cavity along with the rocker. When the fluid enters from the fluid inlet, the valve The flap is impacted by the fluid and rotates with the rocker to open the fluid inlet, the fluid enters the valve cavity, and then flows out from the fluid outlet; when the fluid flows back, the backflow of fluid will make the valve flap return to the original point with the rocker, that is, The disc closes the fluid inlet to prevent fluid backflow. Wherein, the valve cover is provided with a connecting portion, the connecting portion is provided with external threads, and the inner wall of the top opening of the valve body is provided with internal threads, and the valve body and the valve cover are connected by thread rotation, and the There is a groove on the upper surface of the plane close to the top end surface of the valve body on the bonnet, and an O-ring is embedded in the groove, so that the connection between the bonnet and the valve body can be well sealed. Prevents fluid in the cavity from leaking from the bonnet to body junction. The end of the fluid inlet close to the valve cavity is provided with a valve seat sealing ring, and the valve disc is in close contact with the valve seat sealing ring when the fluid inlet is closed. The valve disc and the rocker are integrally formed, and the valve disc and The integral molding of the rocker can simplify the number of parts, simplify the processing technology and reduce the production cost.

Further, a soft sealing material is provided on the position ring where the valve clack is in close contact with the valve seat sealing ring. Preferably, the soft sealing material is rubber or silica gel. Setting soft sealing material at the position where the valve clack is in close contact with the valve seat sealing ring can make the valve clack and the valve seat sealing ring close to each other to obtain better sealing performance, thereby more effectively preventing fluid backflow in the valve cavity .

Compared with the prior art, the utility model has the beneficial effects of:

The utility model adopts threaded connection between the valve cover and the valve body, and an O-shaped sealing ring is embedded at the joint between the valve cover and the valve body, which improves the sealing performance of the check valve; the valve disc and the rocker are integrally formed, The number of parts and components can be simplified, the processing technology can be simplified, and the production cost can be reduced; a soft sealing material can be arranged at the position where the valve clack and the valve seat sealing ring are in close contact, which can make the valve clack and the valve seat sealing ring close to each other to obtain more Good sealing performance, and thus more effectively prevent fluid backflow in the valve chamber.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the utility model.

Fig. 2 is a structural schematic diagram of a valve cover of the present invention.

Fig. 3 is a structural schematic diagram of the valve clack of the present invention.

Detailed ways

The accompanying drawings are for illustrative purposes only, and should not be construed as limitations on this patent; in order to better illustrate this embodiment, certain components in the accompanying drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art It is understandable that some well-known structures and descriptions thereof may be omitted in the drawings. The positional relationship described in the drawings is for illustrative purposes only, and should not be construed as a limitation on this patent.

As shown in Figures 1 to 3, a one-piece flap swing flange check valve includes a valve body, a valve cover, a valve flap and a rocker. There is a fluid inlet and a fluid outlet connected to the valve cavity, the top of the valve body is provided with a top opening, the valve cover is closed on the top opening, one end of the rocker is connected to the inner wall of the valve cavity, and the other end is connected to the valve disc, so that, The valve disc can rotate around the connection point between the rocker and the inner wall of the valve cavity along with the rocker. When the fluid enters from the fluid inlet, the valve disc is impacted by the fluid and rotates with the rocker to open the fluid inlet, and the fluid enters the valve cavity. , and then flow out from the fluid outlet; when the fluid backflow occurs, the backflow fluid will make the valve clack rotate with the rocker back to the original point, that is, the valve clack closes the fluid inlet to prevent fluid backflow. Among them, the valve cover is provided with a connecting part, the connecting part is provided with external threads, and the inner wall of the top opening of the valve body is provided with internal threads. There is a groove on the upper ring of the plane, and an O-ring is embedded in the groove, so that the connection between the valve cover and the valve body can be well sealed, preventing the fluid in the valve cavity from being connected to the valve cover and the valve body. leak everywhere. The end of the fluid inlet close to the valve cavity is provided with a valve seat sealing ring, and the valve disc is close to the valve seat sealing ring when the fluid inlet is closed. , Simplify the processing technology and reduce the production cost.

As shown in Figure 3, a soft sealing material is provided on the position ring where the disc and the sealing ring of the valve seat are in close contact. Preferably, the soft sealing material is rubber or silica gel. A soft sealing material is provided at the position where the valve disc and the valve seat sealing ring are in close contact, so that better sealing performance can be obtained when the valve disc and the valve seat sealing ring are in close contact, thereby more effectively preventing fluid backflow in the valve chamber.

Apparently, the above-mentioned embodiments of the present utility model are only examples for clearly illustrating the present utility model, rather than limiting the implementation manner of the present utility model. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. All modifications, equivalent replacements and improvements made within the spirit and principles of the utility model shall be included in the protection scope of the claims of the utility model.

Claims (3)

1. a kind of integral type flap swing-type flange check valve, including valve body（1）, bonnet（2）, flap（3）And rocking bar（4）, institute State valve body（1）Inside is provided with valve pocket（5）, valve body（1）Both ends are provided with and the valve pocket（5）The fluid inlet communicated（6）And fluid Outlet（7）, the valve body（1）Top is provided with open top, the bonnet（2）Cover in the open top, the rocking bar （4）One end is rotatably connected on valve pocket（5）Inwall on, the other end and the flap（3）Connection, it is characterised in that the bonnet （2）It is provided with connecting portion（21）, the connecting portion（21）It is provided with external screw thread, the valve body（1）Set on open-topped inwall There are internal thread, the valve body（1）And bonnet（2）Connected by screw thread rotation, the bonnet（2）The upper and valve body（1）Top Groove is equipped with the plane that end face is close to（8）, the groove（8）Inside it is embedded with O-ring seal（9）, the fluid inlet（6） Close to valve pocket（5）One end be provided with valve seat insert（10）, the flap（3）Close the fluid inlet（6）When with the valve Seat sealing ring（10）It is close to, the flap（3）And rocking bar（4）It is formed in one.

A kind of 2. integral type flap swing-type flange check valve according to claim 1, it is characterised in that the flap （3）With the valve seat insert（10）The position ring being close to is provided with flexible barrier material（11）.

3. a kind of integral type flap swing-type flange check valve according to claim 2, it is characterised in that described soft close Closure material（11）For rubber or silica gel.