Check valve convenient to assemble

Abstract

The check valve convenient to assemble comprises a valve body, a valve plate, a valve shaft, shaft brackets and shaft bracket locking pieces, a through groove for fluid to pass through is formed in the middle of the valve body, a clamping groove used for clamping the shaft brackets is formed in the edge of the valve body in the axial direction, the clamping groove is communicated with the through groove, the shaft brackets are connected to the two ends of the valve shaft, and the shaft brackets are connected to the valve plate. The valve plate is arranged on the valve shaft, an inserting groove is formed in the top of the clamping groove and extends outwards along the inner wall of the valve body, the shaft bracket locking piece is inserted into the inserting groove and abuts against the shaft bracket, a fixing hole is formed in the shaft bracket locking piece, and a set screw is arranged in the fixing hole. The set screw is used for penetrating through the fixing hole in the axial direction of the valve body to be fixedly connected with the shaft frame. The check valve convenient to assemble not only is simple in structure and convenient to install, but also has good sealing performance and stability.

Description

Technical Field

[0001] The utility model relates to the technical field of check valves, in particular to a check valve that is easy to assemble. Background Art

[0002] The check valve is installed in the piping system, and its main function is to prevent the backflow of the medium. Since the traditional structure is to machine a through hole on the valve body to facilitate the passage of the valve shaft, this increases the external leakage points on the valve body, affecting the reliability of the valve. In order to solve this problem, some check valves with built-in valve plates have emerged, so there is no need to drill holes on the valve body to install the valve plate. For example, the utility model patent with authorization announcement number CN208687036U discloses a double-valve disc check valve, which places the valve shaft in the valve body and connects the valve shaft to the valve body through a fixing block, realizing the built-in valve plate without the need to machine a through hole on the valve body, thereby reducing the external leakage points of the valve body. However, in this installation method, the valve shaft is fixed by abutting the fixing block against the inner wall of the valve body, and then connecting the fixing block to the valve body from the side with screws. During installation, due to the interference of the torsion spring and the valve shaft, the installation of the fixing block is relatively inconvenient, which increases the difficulty of installation and is not convenient for assembly. Utility Model Content

[0003] The purpose of the utility model is to provide a check valve that is easy to assemble, so as to solve the above-mentioned problems existing in the current check valves.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A check valve that is easy to assemble includes a valve body, a valve plate, a valve shaft, a shaft frame and a shaft frame locking piece, a through groove for fluid to pass through is provided in the middle of the valve body, a clamping groove for clamping the shaft frame is provided along the axial direction of the valve body edge, the clamping groove is communicated with the through groove, the shaft frame is connected to both ends of the valve shaft, the valve plate is provided on the valve shaft, a plug-in groove is provided on the top of the clamping groove, the plug-in groove extends outward along the inner wall of the valve body, the shaft frame locking piece is plugged into the plug-in groove and abuts against the shaft frame, a fixing hole is provided on the shaft frame locking piece, a set screw is provided in the fixing hole, and the set screw is used to pass through the fixing hole along the axial direction of the valve body and be fixedly connected to the shaft frame.

[0006] Furthermore, the shaft bracket is semi-cylindrical, including a planar portion and an arcuate portion, the clamping groove is an arcuate groove, the arcuate portion is located in the clamping groove, a first blind hole is provided on the planar portion, and the end of the valve shaft is inserted into the first blind hole.

[0007] Furthermore, a second blind hole is provided on the planar portion, the second blind hole and the first blind hole are spaced apart in the axial direction of the shaft bracket, and a support rod is inserted between the second blind holes of the two shaft brackets.

[0008] Furthermore, a third blind hole is provided on the end surface of the shaft bracket, and the set screw is used to pass through the fixing hole along the axial direction of the valve body and be inserted into the third blind hole.

[0009] Furthermore, the plug-in slot is an arc-shaped slot, the inner diameter of the plug-in slot is larger than the inner diameter of the clamping slot, the shaft frame locking member includes an arc-shaped plug-in plate and an arc-shaped mounting plate, the arc-shaped plug-in plate and the arc-shaped mounting plate are arranged up and down and are integrally formed, the arc-shaped plug-in plate is used to be plugged into the plug-in slot, and the fixing hole is arranged on the arc-shaped mounting plate.

[0010] Furthermore, two valve plates are provided, and the two valve plates are rotatably provided on the valve shaft, wherein a spring is sleeved on the valve shaft, and the spring is used to press the two valve plates into the valve body through elastic force.

[0011] Furthermore, a sealing seat for abutting against the valve plate is provided in the through groove.

[0012] Beneficial effects of the utility model:

[0013] The check valve of the utility model is easy to assemble. Through the design of the clamping groove and the plug-in groove, the valve shaft and the shaft bracket can be conveniently installed and disassembled from the side of the valve body without the need for operation from the inside of the valve body, thereby significantly improving the assembly efficiency. The coordinated use of the shaft bracket locking piece and the set screw ensures the stability of the shaft bracket and the valve shaft on the valve body, and effectively prevents loosening or displacement caused by vibration or fluid impact during use. The simplified assembly steps and easy-to-operate design make the production process more efficient, reduce production time and cost, and are conducive to large-scale production. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a top view of the check valve of the utility model which is easy to assemble;

[0015] Figure 2 It is a cross-sectional view of the check valve of the utility model which is easy to assemble;

[0016] Figure 3 This is a structural schematic diagram (stereoscopic diagram) of the valve body and shaft bracket in the easy-to-assemble check valve of the utility model;

[0017] Figure 4 This is a structural diagram (exploded view) of the valve body and shaft bracket in the easy-to-assemble check valve of the utility model;

[0018] Figure 5This is a schematic structural diagram of the valve body in the check valve of the utility model which is easy to assemble;

[0019] Figure 6 yes Figure 5 Schematic diagram of the structure at A in the middle;

[0020] Figure 7 This is a schematic structural diagram of the shaft frame of the check valve of the utility model which is easy to assemble;

[0021] Figure 8 The utility model is a structural schematic diagram of the shaft frame locking member of the check valve which is easy to assemble.

[0022] The names corresponding to the marks in the figure are:

[0023] 1. Valve body, 11. Through groove, 12. Snap-fit groove, 13. Plug-in groove, 2. Valve plate, 3. Valve shaft, 4. Shaft bracket, 41. Flat surface, 411. First blind hole, 412. Second blind hole, 413. Third blind hole, 42. Arc surface, 5. Shaft bracket locking piece, 51. Fixing hole, 52. Arc-shaped plug-in plate, 53. Arc-shaped mounting plate, 6. Set screw, 8. Spring, 9. Sealing seat. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0025] like Figures 1 to 8 As shown, the check valve of the present invention, which is easy to assemble, comprises a valve body 1 , a valve plate 2 , a valve shaft 3 , a shaft frame 4 and a shaft frame locking member 5 .

[0026] Figure 3-Figure 6 As shown, the valve body 1 is provided with a central through-slot 11 for fluid passage, and an axially defined engaging groove 12 is provided along the edge of the valve body 1 for engaging the shaft bracket 4. Engaging groove 12 communicates with through-slot 11, facilitating the installation of the shaft bracket 4 and the valve shaft 3. The shaft bracket 4 is connected to both ends of the valve shaft 3, and the valve plate 2 is mounted on the valve shaft 3. The opening and closing of the valve plate 2 is controlled by the rotation of the valve shaft 3.

[0027] To facilitate the installation and fixation of the shaft bracket 4 and the valve shaft 3, a plug-in slot 13 is provided at the top of the clamping slot 12. The plug-in slot 13 extends outward along the inner wall of the valve body 1. The shaft bracket locking member 5 is inserted into the plug-in slot 13 and abuts against the shaft bracket 4, thereby fixing the shaft bracket 4 and the valve shaft 3 to the valve body 1.

[0028] In order to further strengthen the fixation, a fixing hole 51 is provided on the shaft bracket locking member 5 , and a set screw 6 is provided in the fixing hole 51 . The set screw 6 is used to pass through the fixing hole 51 along the axial direction of the valve body 1 to be fixedly connected to the shaft bracket 4 .

[0029] Further refine the implementation method. Figure 7 As shown, the shaft bracket 4 is designed in a semi-cylindrical shape, comprising a flat surface portion 41 and a curved surface portion 42. Accordingly, the engaging groove 12 is designed as an arcuate groove to accommodate the shape of the shaft bracket 4. The curved surface portion 42 is positioned within the engaging groove 12, while the flat surface portion 41 facilitates installation and securement. A first blind hole 411 is provided in the flat surface portion 41, into which the end of the valve shaft 3 is inserted, thereby connecting the valve shaft 3 to the shaft bracket 4.

[0030] To increase structural stability and support strength for the valve shaft 3, a second blind hole 412 is further provided on the planar portion 41. The second blind hole 412 is spaced apart from the first blind hole 411 in the axial direction of the shaft bracket 4. A support rod is inserted between the second blind holes 412 of the two shaft brackets 4, further enhancing the stability of the overall structure.

[0031] In order to facilitate the fixing of the set screw 6, a third blind hole 413 is provided on the end surface of the shaft frame 4. The set screw 6 not only passes through the fixing hole 51, but is also further inserted into the third blind hole 413, thereby enhancing the firmness of the fixation.

[0032] like Figure 6 and Figure 8 As shown, the insertion slot 13 is designed as an arcuate slot with an inner diameter larger than that of the engaging slot 12 to accommodate the shape of the shaft bracket locking member 5. The shaft bracket locking member 5 specifically comprises an arcuate insertion plate 52 and an arcuate mounting plate 53, which are disposed one above the other and integrally formed. The arcuate insertion plate 52 is inserted into the insertion slot 13, while the fixing hole 51 is provided in the arcuate mounting plate 53 to facilitate the installation of the set screw 6.

[0033] Two valve plates 2 are provided, and the two valve plates 2 are rotatably provided on the valve shaft 3. A spring 8 is also sleeved on the valve shaft 3. The function of the spring 8 is to press the two valve plates 2 into the valve body 1 through elastic force to ensure that the valve plates 2 can be tightly closed when there is no fluid pressure.

[0034] In addition, a sealing seat 9 is provided in the through groove 11 for abutting against the valve plate 2 to improve the sealing performance of the valve.

[0035] During actual assembly, pass the valve shaft through the center holes of the two valve plates, ensuring that the valve plates can rotate freely on the valve shaft. Then, put the spring on the valve shaft and place it between the two valve plates, ensuring that the spring can provide sufficient elastic force to keep the valve plates closed when no fluid passes through. Insert the support rod into the second blind hole of the two shaft brackets to increase the stability and support force of the valve shaft. Then align the arc surface of the shaft bracket with the clamping groove on the edge of the valve body and gently push it in so that the flat part of the shaft bracket is close to the outer wall of the valve body. Ensure that the two ends of the valve shaft are respectively inserted into the first blind holes of the two shaft brackets. After completing the above assembly, you can align the shaft bracket locking piece with the plug-in groove on the valve body and push it in from the outside so that the curved plug-in plate is fully inserted into the plug-in groove. Ensure that the curved mounting plate of the shaft bracket locking piece is close to the outer wall of the valve body and is aligned with the flat part of the shaft bracket. Then, pass the set screw through the fixing hole on the shaft bracket locking piece and align it with the third blind hole on the end face of the shaft bracket. Use a screwdriver or Allen wrench to tighten the set screw until the shaft bracket is firmly locked on the valve body.

[0036] Through the above specific implementation methods, the easy-to-assemble check valve of the present invention not only has a simple structure and is easy to install, but also has good sealing performance and stability, and is very suitable for use in a pipeline system to prevent the backflow of the medium.

[0037] Obviously, the embodiments described are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art are within the scope of protection of the present invention.

Claims

1. A check valve that is easy to assemble, characterized by: The cam is connected to the valve body at both ends of the valve shaft, and the valve plate is arranged on the valve shaft. The top of the cam is provided with a plug-in groove, and the plug-in groove extends outward along the inner wall of the valve body. The cam locking piece is plugged into the plug-in groove and abuts against the cam. A fixing hole is provided on the cam locking piece, and a set screw is provided in the fixing hole. The set screw is used to pass through the fixing hole along the axial direction of the valve body and be fixedly connected to the cam.

2. The easy-to-assemble check valve according to claim 1, characterized in that: The shaft bracket is semi-cylindrical and includes a flat surface portion and an arc surface portion. The clamping groove is an arc groove. The arc surface portion is located in the clamping groove. A first blind hole is provided on the flat surface portion. The end portion of the valve shaft is inserted into the first blind hole.

3. The easy-to-assemble check valve according to claim 2, characterized in that: A second blind hole is provided on the planar portion. The second blind hole and the first blind hole are spaced apart in the axial direction of the shaft bracket. A support rod is inserted between the second blind holes of the two shaft brackets.

4. The easy-to-assemble check valve according to claim 3, characterized in that: A third blind hole is provided on the end surface of the shaft bracket, and the set screw is used to pass through the fixing hole along the axial direction of the valve body and be clamped into the third blind hole.

5. The easy-to-assemble check valve according to claim 4, characterized in that: The plug-in slot is an arc-shaped slot, and the inner diameter of the plug-in slot is larger than the inner diameter of the clamping slot. The shaft frame locking piece includes an arc-shaped plug-in plate and an arc-shaped mounting plate. The arc-shaped plug-in plate and the arc-shaped mounting plate are arranged up and down and are integrally formed. The arc-shaped plug-in plate is used to be plugged into the plug-in slot, and the fixing hole is arranged on the arc-shaped mounting plate.

6. The easy-to-assemble check valve according to claim 5, characterized in that: There are two valve plates, which are rotatably arranged on the valve shaft. A spring is sleeved on the valve shaft, and the spring is used to press the two valve plates into the valve body through elastic force.

7. The easy-to-assemble check valve according to claim 6, characterized in that: A sealing seat for abutting against the valve plate is provided in the through groove.

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