Vertical three-piece check valve

Abstract

The utility model discloses a vertical three-piece check valve, both ends of valve body are all seted up with seal ring groove, is provided with valve body seal in seal ring groove, both ends of valve body are all connected with connecting end, and the outer sleeve of every connecting end is provided with flange, and the fixed connection between two flanges, the inner wall of valve body is apart and is provided with two stop ring grooves, and the inlay of two stop ring grooves is provided with stop ring, and the valve disc bushing is seted up in the outer of the guide shaft of valve clack between two stop rings, and the spring is equipped between valve disc bushing and the sealing end of valve clack, and the sealing ring is inlaid in the bottom surface of sealing end, and the sealing ring is located the top of lower connecting end. The utility model discloses simple structure, convenient to install and maintain, good sealing performance and suitable for vertical installation check valve.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a vertical three-piece check valve. Background Technology

[0002] In fluid transport systems, check valves are crucial devices for preventing backflow of the medium. Traditional check valves have several shortcomings, such as complex structure leading to high manufacturing difficulty and cost; inconvenient installation and maintenance, consuming significant manpower and resources; and poor sealing performance, making them prone to leakage, affecting normal system operation, and potentially causing safety hazards. For vertical installations, existing check valves are not ideal in adapting to vertical pipelines and coping with gravity and fluid impact. Utility Model Content

[0003] This utility model addresses the problems of existing check valves, such as complex structure, inconvenient installation and maintenance, poor sealing performance, and unsuitability for vertical installation, by providing a vertical three-piece check valve.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: a vertical three-piece check valve, including a valve body, with sealing ring grooves at both ends of the valve body, and valve body seals installed in the sealing ring grooves. Both ends of the valve body are connected to connecting ends, and a flange is fitted on the outside of each connecting end. The two flanges are fixedly connected. Two stop ring grooves are spaced apart on the inner wall of the valve body, and stop rings are embedded in the two stop ring grooves. A valve disc bushing is provided between the two stop rings. The valve disc bushing is fitted on the guide shaft of the valve disc. A spring is provided between the valve disc bushing and the sealing end of the valve disc. A sealing ring is embedded on the bottom surface of the sealing end of the valve disc, and the sealing ring is located above the lower connecting end.

[0005] Furthermore, the valve body has a hollow cylindrical structure.

[0006] Furthermore, the two flanges are fixedly connected by bolts and nuts.

[0007] Furthermore, the valve body seal is made of PTFE or graphite.

[0008] Furthermore, the valve disc bushing has a stepped structure of a hollow cylinder, and the spring is fitted around the thin cylinder at the lower end of the valve disc bushing.

[0009] Furthermore, the sealing ring is made of PTFE.

[0010] This utility model is a check valve with a simple structure, convenient installation and maintenance, good sealing performance, and suitable for vertical installation. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] The components are: 1. Connecting end; 2. Flange; 3. Valve body seal; 4. Valve body; 5. Valve disc bushing; 6. Spring; 7. Valve disc; 8. Sealing ring; 9. Stop ring. Detailed Implementation

[0013] The following is in conjunction with the appendix Figure 1 The technical solution of this utility model has been clearly and completely described. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0014] A vertical three-piece check valve includes a valve body 4, which is a hollow cylindrical structure. Both ends of the valve body 4 have sealing ring grooves, within which valve body seals 3 are installed. Both ends of the valve body 4 are connected to connecting ends 1, each connected end 1 being fitted with a flange 2. The two flanges 2 are fixedly connected by bolts and nuts. Two stop ring grooves are spaced apart on the inner wall of the valve body 4, each containing a stop ring 9. A valve disc bushing 5 is positioned between the two stop rings 9, fitting outside the guide shaft of the valve disc 7. A spring 6 is located between the valve disc bushing 5 and the sealing end of the valve disc 7. The valve disc bushing 5 has a hollow cylindrical stepped structure. The spring 6 fits outside the thin cylinder at the lower end of the valve disc bushing 5. A sealing ring 8 is embedded on the bottom surface of the sealing end of the valve disc 7, located above the lower connecting end 1. The valve body seal 3 is made of PTFE or graphite. The sealing ring 8 is made of PTFE.

[0015] First, install the valve body seal 3 in the grooves on both sides of the valve body 4. Then, install the valve disc bushing 5 inside the valve body 4 and fix it in the predetermined position. Next, install the spring 6 onto the guide shaft on the back of the valve disc 7, and then insert the valve disc 7 into the guide hole of the valve disc bushing 5, ensuring that the spring 6 and the valve disc bushing 5 are in close contact. Connect the installed valve body assembly to the connecting ends 1 on both sides by tightening the flanges 2, bolts, and nuts, ensuring that the valve body 4 is firmly clamped between the connecting ends 1, compressing the valve body seal 3 to form a good seal.

[0016] When the fluid flows in the forward direction, the fluid pushes the valve disc 7 upward against the elastic force of the return spring 6, thereby opening the valve and allowing the fluid to pass smoothly; when the fluid tends to flow backward, under the action of the return spring 6, the valve disc 7 quickly falls back and fits tightly against the connection end 1, preventing the fluid from flowing backward.

[0017] Valve body seals 3 are provided on both end faces of the valve body 4. When the left and right connecting ends 1 are connected by bolts and the valve body 4 is clamped, the valve body seals 3 are compressed, thereby forming a good seal and effectively preventing the medium from leaking from the connection of the valve body 4. At the same time, a sealing ring 8 is embedded at the lower end of the valve disc 7, which can fit well with the inlet connecting end 1, further improving the sealing performance.

[0018] To better adapt to different connection types, connection end 1 adopts a universal design, allowing selection of the appropriate connection end 1 based on the connection method of different pipelines. This installation interface can be a flange interface, where bolts are used to tightly connect the valve to the pipeline flange, ensuring a secure and reliable seal; or it can be a welded connection, directly tightened onto the pipeline with the corresponding threads, making the installation process simple and quick.

[0019] The embodiments described above are merely preferred embodiments of this utility model, and not all feasible embodiments of this utility model. For those skilled in the art, any obvious modifications made without departing from the principles and spirit of this utility model should be considered to be included within the scope of protection of the claims of this utility model. Although this utility model has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of this utility model. In particular, as long as there is no technical conflict, the features in the embodiments disclosed in this utility model can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, this utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A vertical three-piece check valve, characterized in that, The valve body (4) includes a valve body (4), both ends of which are provided with sealing ring grooves. A valve body seal (3) is provided in the sealing ring groove. Both ends of the valve body (4) are connected to a connecting end (1). A flange (2) is fitted on the outside of each connecting end (1). The two flanges (2) are fixedly connected. Two stop ring grooves are opened at intervals on the inner wall of the valve body (4). A stop ring (9) is embedded in each of the two stop ring grooves. A valve disc bushing (5) is provided between the two stop rings (9). The valve disc bushing (5) is fitted on the outside of the guide shaft of the valve disc (7). A spring (6) is provided between the valve disc bushing (5) and the sealing end of the valve disc (7). A sealing ring (8) is embedded on the bottom surface of the sealing end of the valve disc (7). The sealing ring (8) is located above the lower connecting end (1).

2. The vertical three-piece check valve according to claim 1, characterized in that, The valve body (4) is a hollow cylindrical structure.

3. The vertical three-piece check valve according to claim 1, characterized in that, The two flanges (2) are fixedly connected by bolts and nuts.

4. The vertical three-piece check valve according to claim 1, characterized in that, The valve body seal (3) is made of PTFE or graphite.

5. The vertical three-piece check valve according to claim 1, characterized in that, The valve disc bushing (5) is a hollow cylindrical stepped structure, and the spring (6) is fitted on the thin cylinder at the lower end of the valve disc bushing (5).

6. The vertical three-piece check valve according to claim 1, characterized in that, The sealing ring (8) is made of PTFE.

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