Swing check valve

Abstract

The utility model provides a swing check valve which comprises a valve body, an installation groove is formed in the valve body, a set of fixing plates are arranged in the installation groove, threaded holes are formed in the set of fixing plates, a swing rod is arranged between the set of fixing plates, rotating holes are formed in the positions, corresponding to the two fixing plate faces, of one end of the swing rod, and the other end of the swing rod is connected with the threaded holes. The rotating hole and a threaded hole in the fixing plate are coaxial, and a fixing bolt is connected into the threaded hole in a threaded mode. According to the utility model, the mounting groove is formed in the valve body, and the group of fixing plates are fixedly connected in the mounting groove, so that when the oscillating rod is mounted, the rotating hole in the oscillating rod is coaxial with the threaded hole in the fixing plate, then the fixing bolt is in threaded connection in the threaded hole, and the rotating shaft can be driven into the rotating hole of the oscillating rod along with the screwing of the fixing bolt; the swing rod can be installed without forming a threaded hole in the valve body, the sealing performance of the valve body is greatly guaranteed, and the water seepage condition is avoided.

Description

Technical Field

[0001] This utility model relates to a swing check valve, belonging to the field of valve technology. Background Technology

[0002] A swing check valve is a type of valve used to prevent backflow of fluid. It is typically installed in pipelines to ensure that the medium can only flow in one direction. This type of valve relies primarily on the flow of the medium itself to open and close. When the medium flows in the forward direction, the valve disc is pushed open by the fluid, allowing the medium to pass through. When the medium stops flowing or flows in the reverse direction, the valve disc closes due to its own gravity and the pressure of the reverse medium, preventing backflow.

[0003] In existing swing check valves, the valve disc is mounted on a swing rod. The swing rod is installed by inserting a rotating shaft through a set of threaded holes in the valve body and clamping the shaft between the threaded holes with bolts. However, the threaded connection between the bolts and the threaded holes in the valve body can lead to water leakage if the seal is poor or the gasket is damaged, thus compromising the valve's sealing performance. Therefore, this invention proposes a swing check valve to solve the above problems. Utility Model Content

[0004] Based on the above background, the purpose of this utility model is to provide a swing check valve to solve the problems in the background art.

[0005] This utility model provides the following technical solution:

[0006] A swing check valve includes a valve body with an internal mounting groove. A set of fixing plates is provided within the mounting groove. Each fixing plate has a threaded hole. A swing rod is provided between the fixing plates. One end of the swing rod has a rotating hole corresponding to two of the fixing plates. The rotating hole is coaxial with the threaded hole on the fixing plate. A fixing bolt is threaded into the threaded hole. A rotating shaft is provided at the front end of the fixing bolt, and the rotating shaft is inserted into the rotating hole. A valve disc is fixedly connected to the other end of the swing rod by a first bolt.

[0007] Preferably, the valve body is provided with an annular groove, and a valve seat is installed in the annular groove. The valve seat can abut against the valve disc when the swing rod swings.

[0008] Preferably, the valve body is provided with connecting flanges at both ends.

[0009] Preferably, the valve body is topped with a valve cover via multiple second bolt flanges.

[0010] Preferably, the valve cover is provided with an anti-collision block at the bottom.

[0011] Preferably, the anti-collision block can abut against the back of the valve disc.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] This utility model discloses a swing check valve. By opening an installation groove inside the valve body and fixing a set of fixing plates in the installation groove, when installing the swing rod, firstly, the rotating hole on the swing rod is aligned with the threaded hole on the fixing plate, and then a fixing bolt is threaded into the threaded hole. As the fixing bolt is screwed in, the rotating shaft is driven into the rotating hole of the swing rod, and the swing rod can be installed. There is no need to open a threaded hole on the valve body, which greatly ensures the sealing performance of the valve body and avoids water leakage. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0016] Figure 2 This is a half-sectional structural diagram of the present invention;

[0017] Figure 3 This is a schematic diagram of the valve body structure of this utility model;

[0018] Figure 4 This is a schematic diagram showing the positional relationship between the fixing bolt and the rotating shaft of this utility model;

[0019] Figure 5 This is a schematic diagram of the swing rod structure of this utility model.

[0020] In the diagram: 1. Valve body; 2. Mounting groove; 3. Fixing plate; 4. Threaded hole; 5. Swing rod; 6. Rotary hole; 7. Fixing bolt; 8. Rotating shaft; 9. Valve disc; 10. First bolt; 11. Annular groove; 12. Valve seat; 13. Connecting flange; 14. Second bolt; 15. Valve cover; 16. Anti-collision block. Detailed Implementation

[0021] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. It should be understood that the implementation of this utility model is not limited to the following embodiments, and any modifications and / or alterations made to this utility model will fall within the protection scope of this utility model.

[0022] In this invention, unless otherwise specified, all parts and percentages are by weight, and the equipment and raw materials used are commercially available or commonly used in the field. Unless otherwise specified, the methods in the following embodiments are conventional methods in the field. Unless otherwise specified, the components or equipment in the following embodiments are general standard parts or components known to those skilled in the art, and their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0023] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following detailed description, many specific details are set forth to facilitate explanation and provide a comprehensive understanding of the embodiments of the present invention. However, one or more embodiments may be practiced by those skilled in the art without these specific details.

[0024] like Figures 1-5 As shown, a swing check valve includes a valve body 1. The valve body 1 has an internal mounting groove 2. A set of fixing plates 3 are provided in the mounting groove 2. Each of the fixing plates 3 has a threaded hole 4. A swing rod 5 is provided between the fixing plates 3. One end of the swing rod 5 has a rotating hole 6 on each of the two fixing plates 3. The rotating hole 6 is coaxial with the threaded hole 4 on the fixing plate 3. A fixing bolt 7 is threaded into the threaded hole 4. The front end of the fixing bolt 7 has a rotating shaft 8. The rotating shaft 8 is inserted into the rotating hole 6. The other end of the swing rod 5 is fixedly connected to a valve disc 9 by a first bolt 10.

[0025] In the above technical solution, by opening an installation groove 2 inside the valve body 1 and fixing a set of fixing plates 3 in the installation groove 2, when installing the swing rod 5, firstly, the rotating hole 6 on the swing rod 5 is aligned with the threaded hole 4 on the fixing plate 3, and then the fixing bolt 7 is threaded into the threaded hole 4. As the fixing bolt 7 is screwed in, the rotating shaft 8 can be driven into the rotating hole 6 of the swing rod 5, and the swing rod 5 can be installed. There is no need to open a threaded hole 4 on the valve body 1, which greatly ensures the sealing performance of the valve body 1 and avoids water leakage.

[0026] In this utility model, the valve body 1 is provided with an annular groove 11, and a valve seat 12 is installed in the annular groove 11. The valve seat 12 can abut against the valve disc 9 when the swing rod 5 swings.

[0027] In the above technical solution, through the valve seat 12, when the water flows in reverse, under the weight of the valve disc 9 itself and the pressure of the water flowing in reverse, the valve disc 9 rotates to a state of contact with the valve seat 12, thereby achieving the function of interception.

[0028] In this utility model, both ends of the valve body 1 are provided with connecting flanges 13.

[0029] In the above technical solution, the connecting flanges 13 provided at both ends of the valve body 1 can be used to connect this utility model with the pipe flange.

[0030] In this invention, the valve body 1 is flanged and connected to the top of a valve cover 15 via multiple second bolts 14. The bottom of the valve cover 15 is provided with an anti-collision block 16. The anti-collision block 16 can abut against the back of the valve disc 9.

[0031] In the above technical solution, by setting an anti-collision block 16 at the bottom of the valve cover 15, when the valve disc 9 is opened to the maximum extent, the back of the valve disc 9 abuts against the anti-collision block 16, which can prevent the valve disc 9 from colliding with the valve body 1 and causing damage to the valve body 1.

[0032] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A swing check valve, characterized in that: The valve includes a valve body (1), which has an installation groove (2) inside. A set of fixing plates (3) is provided in the installation groove (2). Each of the fixing plates (3) has a threaded hole (4). A swing rod (5) is provided between the fixing plates (3). One end of the swing rod (5) has a rotating hole (6) on each of the two fixing plates (3). The rotating hole (6) is coaxial with the threaded hole (4) on the fixing plate (3). A fixing bolt (7) is threaded into the threaded hole (4). A rotating shaft (8) is provided at the front end of the screw of the fixing bolt (7). The rotating shaft (8) is inserted into the rotating hole (6). The other end of the swing rod (5) is fixedly connected to a valve disc (9) by a first bolt (10).

2. The swing check valve according to claim 1, characterized in that: The valve body (1) is provided with an annular groove (11), and a valve seat (12) is installed in the annular groove (11). The valve seat (12) can abut against the valve disc (9) when the swing rod (5) swings.

3. A swing check valve according to claim 1, characterized in that: The valve body (1) is provided with connecting flanges (13) at both ends.

4. A swing check valve according to claim 3, characterized in that: The valve body (1) is flanged at the top by a plurality of second bolts (14) and a valve cover (15) is connected thereto.

5. A swing check valve according to claim 4, characterized in that: The valve cover (15) is provided with a shock-absorbing block (16) at the bottom.

6. A swing check valve according to claim 5, characterized in that: The anti-collision block (16) can abut against the back of the valve disc (9).

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