Swing check valve

Abstract

The utility model discloses a swing check valve, which relates to the technical field of pipeline valves and comprises a valve body, a mounting cavity is arranged in the middle of the inner side of the valve body, a guide groove is arranged above one end of the inner side of the mounting cavity, the bottom of the guide groove is fixedly connected with a butt joint mortise, and a mounting tenon is clamped on the inner side of the butt joint mortise. By arranging the guide groove, the butt joint mortise, the installation tenon, the positioning block plate, the fixing clamping plate, the sealing ring and the sealing plate, the rocker arm is installed outside the valve body during installation, and the positioning block plate with the installed rocker arm is clamped into the butt joint groove through the guide groove; then the fixing clamping plate is attached to the upper surface of the positioning block plate and clamped to the fixing clamping groove formed in the inner wall of the valve body, the sealing ring is clamped to the positioning block plate, and the sealing plate is clamped to the sealing ring and fixed through the fixing nut, so that the valve clack can be conveniently and rapidly mounted and dismounted, and the damaged valve clack can be conveniently maintained and replaced; and the sealing performance of the valve body and the valve cover is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline valves, in particular to a swing check valve. Background Art

[0002] The swing check valve, also known as the non-return (flow) valve, is an automatic valve used to prevent the backflow of media in a one-way flow pipeline. It relies on the pressure of the pipeline medium flow to open or close the valve. It can be divided into three types: single-flap type, double-flap type and multi-flap type. It is one of the more commonly used valves.

[0003] Patent No. CN110388484B discloses a swing check valve. When the valve disc is opened, the rocker drives the rotating shaft and the connecting shaft to rotate, and then drives the buffer piston to move upward through the spiral groove on the connecting shaft, the one-way valve plate opens, and the silicone oil in the upper piston chamber quickly flows into the lower piston chamber through the one-way valve plate, and the valve disc can be opened quickly; when the valve disc is closed, the rocker drives the rotating shaft and the connecting shaft to rotate, and then drives the buffer piston to move downward through the spiral groove on the connecting shaft, the one-way valve plate is closed, and the silicone oil in the lower piston chamber can only flow into the upper piston chamber through the throttling groove, which has a damping effect on the rotation of the rotating shaft, can reduce the closing speed of the valve disc, reduce the impact, prevent water hammer, and prevent damage to the valve.

[0004] The connecting shaft for installing the rocker arm in traditional swing check valves is mostly fixedly connected to the inner wall of the valve body. When installing the valve stem, due to the small valve opening, the staff needs to reach into the valve body cavity, clip the rocker arm onto the connecting shaft and then fix it with a nut. However, during the installation process, the hand inserted into the valve body will block the installation line of sight, resulting in the staff only being able to feel for the nut hole and position by hand when installing the nut. It is difficult to clip the nut into the nut hole at once, and the gap on the side of the valve cavity is small, which makes installation more difficult. Utility Model Content

[0005] The purpose of the utility model is to solve the problem that the connecting shaft for installing the rocker arm in the traditional swing check valve is mostly fixedly connected to the inner wall of the valve body. When installing the valve stem, due to the small valve opening, the staff needs to put their hands into the valve body cavity, clamp the rocker arm onto the connecting shaft and then fix it with a nut. However, the hand inserted into the valve body during the installation process will block the installation line of sight, resulting in the staff only being able to feel the nut hole and position by hand when installing the nut, and it is difficult to clamp the nut into the nut hole at once. In addition, the gap on the side of the valve cavity is small and it is also more difficult to install. A swing check valve is provided.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a swing check valve comprises a valve body, a mounting cavity is provided in the middle part of the inner side of the valve body, a guide groove is provided above one end of the inner side of the mounting cavity, a docking mortise is fixedly connected to the bottom of the guide groove, a mounting tenon is clamped on the inner side of the docking mortise, a positioning block plate is fixedly connected to one end of the mounting tenon, a fixing clamping plate is clamped on the top of the positioning block plate, a sealing ring is clamped on the top of the fixing clamping plate, a sealing plate is clamped on the top of the sealing ring, a rocker arm is rotatably connected to the inner side of the positioning block plate, a valve disc is provided at one end of the bottom of the rocker arm, a guide wheel is rotatably connected to the middle part of the front and rear sides of the valve disc, and a guide arc groove is provided on the outer side of the guide wheel.

[0007] As a further solution of the utility model: a water inlet is provided at one end of the inner side of the valve body, a water outlet is provided at the other end of the inner side of the valve body, the valve flap is located at one end of the water inlet, and a valve cover is clamped at the middle part above the valve body.

[0008] As a further solution of the utility model: a fixing plate is fixedly connected to the middle of the other end of the inner side of the installation cavity, and a fixing nut is provided on the top of the sealing plate.

[0009] As a further solution of the utility model: the guide wheel is slidably connected to the guide arc groove, and the guide arc groove is opened at the bottom end of the inner side of the installation cavity.

[0010] As a further solution of the utility model: a fixed clamping head is fixedly connected to the middle of one end of the fixed clamping plate, and a fixed clamping groove is clamped on the outer side of the fixed clamping head.

[0011] As a further solution of the utility model: a plurality of connection slots are provided on the outer surface of the top of the positioning block plate, and a plurality of connection clamps matching the connection slots are fixedly connected to the surface of the bottom end of the fixed clamp plate.

[0012] Compared with the prior art, the utility model has the beneficial effects of facilitating quick installation and disassembly of the valve flap, facilitating repair and replacement of a damaged valve flap, and facilitating improving the sealing performance of the valve body and valve cover.

[0013] 1. Through the set guide groove, docking groove, installation tenon, positioning block plate, fixed clamping plate, sealing ring and sealing plate, the rocker arm is installed on the outside of the valve body during installation, and the positioning block plate with the installed rocker arm is clamped into the docking groove through the guide groove, and then the fixed clamping plate is attached to the upper surface of the positioning block plate and clamped into the fixed clamping groove opened on the inner wall of the valve body, the sealing ring is clamped onto the positioning block plate, and the sealing plate is clamped onto the sealing ring and fixed with a fixing nut, which makes it easy to quickly install and disassemble the valve disc, to repair and replace the damaged valve disc, and to improve the sealing of the valve body and valve cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the cross-sectional structure of the main view of the utility model;

[0015] Figure 2 For this utility model Figure 1 The structural diagram of the enlarged view of the middle A part;

[0016] Figure 3 It is a schematic diagram of the structure of the top view of the valve body of the utility model;

[0017] Figure 4 It is a structural schematic diagram of the disassembly stereogram of the fixed clamping plate and the sealing plate of the utility model.

[0018] In the figure: 1. valve body; 2. water inlet; 3. water outlet; 4. installation cavity; 5. valve cover; 6. guide arc groove; 7. valve disc; 8. fixing plate; 9. sealing ring; 10. sealing plate; 11. guide wheel; 12. rocker arm; 13. positioning block plate; 14. mounting tenon; 15. docking tenon groove; 16. guide groove; 17. fixing clamp plate; 18. fixing nut; 19. fixing clamp groove; 20. connecting clamp groove. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1 to Figure 4In the embodiment of the utility model, a swing check valve comprises a valve body 1, a mounting cavity 4 is provided in the middle of the inner side of the valve body 1, a guide groove 16 is provided above one end of the inner side of the mounting cavity 4, a docking mortise 15 is fixedly connected to the bottom of the guide groove 16, a mounting tenon 14 is clamped on the inner side of the docking mortise 15, a positioning block 13 is fixedly connected to one end of the mounting tenon 14, a fixed clamping plate 17 is clamped on the top of the positioning block 13, a sealing ring 9 is clamped on the top of the fixed clamping plate 17, a sealing plate 10 is clamped on the top of the sealing ring 9, a rocker arm 12 is rotatably connected to the inner side of the positioning block 13, a valve disc 7 is provided at one end of the bottom of the rocker arm 12, a guide wheel 11 is rotatably connected to the middle of the front and rear sides of the valve disc 7, and the outer side of the guide wheel 11 A guide arc groove 6 is provided on the side, a water inlet 2 is provided at one end of the inner side of the valve body 1, a water outlet 3 is provided at the other end of the inner side of the valve body 1, a valve disc 7 is located at one end of the water inlet 2, a valve cover 5 is clamped in the middle above the valve body 1, a fixing plate 8 is fixedly connected in the middle of the other end of the inner side of the installation cavity 4, a fixing nut 18 is provided on the top of the sealing plate 10, a guide wheel 11 is slidably connected to the guide arc groove 6, the guide arc groove 6 is opened at the bottom end of the inner side of the installation cavity 4, a fixing clamp is fixedly connected in the middle of one end of the fixing clamp 17, a fixing groove 19 is clamped on the outer side of the fixing clamp, a plurality of connecting grooves 20 are opened on the outer surface of the top of the positioning block plate 13, and a plurality of connecting clamps matching the connecting grooves 20 are fixedly connected on the surface of the bottom end of the fixing clamp 17.

[0021] In this embodiment: during installation, the rocker arm 12 is installed on the positioning block plate 13 outside the valve body. After installation, the mounting tenon 14 fixed at one end of the positioning block plate 13 is first clamped into the guide groove 16, and then the positioning block plate 13 is pushed so that the positioning block plate 13 is clamped into the docking tenon groove 15 along the guide groove 16, so that the rocker arm 12 and the valve disc 7 installed on the positioning block plate 13 are quickly installed into the mounting cavity 4 provided on the inner side of the valve body 1, so that the guide wheel 11 provided on the valve disc 7 is clamped into the guide arc groove 6, and then the fixed clamping plate 17 is clamped onto the positioning block plate 13 so that the fixed clamping plate The connecting clamp head fixedly connected at the bottom of the plate 17 is clamped into the connecting clamp groove 20 opened on the positioning block plate 13, so that the fixing clamp head fixedly connected at the middle part of one end of the fixing clamp plate 17 is clamped into the fixing clamp groove 19, thereby sealing the sliding notch of the positioning block plate 13, and fixing the positioning block plate 13 at the position where the docking groove 15 is located, and then placing the sealing ring 9 on the support hoop plate spliced ​​by the fixing clamp plate 17 and the fixing plate 8, and then clamping the sealing plate 10 onto the sealing ring 9, and fixing the sealing plate 10 with a nut, so as to fix the adjusted position of the positioning clamp plate 13;

[0022] When water flows in from the water inlet and pushes the valve flap 7 to rotate to one end, the guide wheel 11 provided on the valve flap 7 will slide to one end along the guide arc groove 6 to improve the stability of the valve flap 7 in rotation and opening and closing. When the valve is closed, the water flowing back from the water outlet will block the water flow on one side when it contacts the sealing plate 10 on the sealing ring 9. When the sealing plate 10 is damaged, when the water flows through the sealing plate 10 and contacts the valve cover 5, the valve cover 5 will perform secondary sealing, which is beneficial to improve the sealing of the installation cavity provided in the middle of the valve body.

[0023] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A swing check valve, comprising a valve body (1), characterized in that: A mounting cavity (4) is provided in the middle of the inner side of the valve body (1), a guide groove (16) is provided above one end of the inner side of the mounting cavity (4), a docking tenon (15) is fixedly connected to the bottom of the guide groove (16), a mounting tenon (14) is clamped to the inner side of the docking tenon (15), one end of the mounting tenon (14) is fixedly connected to a positioning block plate (13), a fixed clamping plate (17) is clamped to the top of the positioning block plate (13), a sealing ring (9) is clamped to the top of the fixed clamping plate (17), a sealing plate (10) is clamped to the top of the sealing ring (9), a rocker arm (12) is rotatably connected to the inner side of the positioning block plate (13), a valve flap (7) is provided at one end of the bottom of the rocker arm (12), a guide wheel (11) is rotatably connected to the middle of the front and rear sides of the valve flap (7), and a guide arc groove (6) is provided on the outer side of the guide wheel (11).

2. A swing check valve according to claim 1, characterized in that: A water inlet (2) is provided at one end of the inner side of the valve body (1), a water outlet (3) is provided at the other end of the inner side of the valve body (1), the valve flap (7) is located at one end of the water inlet (2), and a valve cover (5) is clamped in the middle of the upper part of the valve body (1).

3. A swing check valve according to claim 1, characterized in that: A fixing plate (8) is fixedly connected to the middle of the other end of the inner side of the installation cavity (4), and a fixing nut (18) is provided on the top of the sealing plate (10).

4. A swing check valve according to claim 1, characterized in that: The guide wheel (11) is slidably connected to the guide arc groove (6), and the guide arc groove (6) is opened at the bottom end of the inner side of the installation cavity (4).

5. The swing check valve according to claim 1, characterized in that: A fixed clamping head is fixedly connected to the middle of one end of the fixed clamping plate (17), and a fixed clamping groove (19) is clamped on the outer side of the fixed clamping head.

6. A swing check valve according to claim 1, characterized in that: A plurality of connection slots (20) are provided on the outer surface of the top of the positioning block plate (13), and a plurality of connection clips matching the connection slots (20) are fixedly connected to the surface of the bottom end of the fixed clip plate (17).

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