Welding check valve

Abstract

The utility model discloses a welded check valve, and relates to the field of check valves. The welding check valve comprises a check valve main body, a valve main body is arranged in the check valve main body, a noise reduction mechanism is arranged in the check valve main body, the noise reduction mechanism is used for reducing noise in the check valve main body, and the noise reduction mechanism comprises an abutting plate which is arranged in the check valve main body. The abutting plate is used for reducing the contact face of the valve body, the moving plate is arranged above the abutting plate and used for buffering the collision force of the valve body, and the spring is arranged above the moving plate and used for automatic returning of the moving plate. According to the welding check valve, by arranging the abutting plate, the contact face between the abutting plate and the connecting block is reduced, then the upward impulsive force of the valve body is reduced through the moving plate and the spring, and therefore noise caused by water flow pressure changes is reduced.

Description

Technical Field

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

[0002] The check valve is an important valve structure in welding equipment, which is often used to prevent liquid backflow and protect the equipment from damage caused by reverse flow.

[0003] The existing welded check valves are affected by the liquid flow pressure, and after the valve is opened, it will repeatedly hit the baffle and produce continuous noise;

[0004] The reason for this problem is that when the welded check valve is in use, water flows through the inside of the valve body and the forward impact of the water flow opens the valve body. After the valve rotates upward and opens, it will contact the fixed plate. The fixed plate prevents the valve from continuing to rotate upward. If the water flows back, the valve body will rotate in the opposite direction and close due to the water flow pressure. The liquid flow pressure will change with the liquid flow rate. At this time, if the liquid flow rate changes repeatedly when passing through the valve, the position of the valve will move downward with the water flow pressure, and it will intermittently collide with the baffle. Both the valve and the baffle are made of metal. Therefore, the valve will generate continuous noise in the process of repeatedly colliding with the baffle, affecting the use effect of the check valve. Therefore, we propose a welded check valve. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a welding check valve, which solves the problem that the existing welding check valve is affected by the liquid flow pressure and repeatedly hits the baffle to generate continuous noise after the valve is opened.

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a welded check valve, comprising a check valve body, a valve body is arranged inside the check valve body, a noise reduction mechanism is arranged inside the check valve body, the noise reduction mechanism is used to reduce the internal noise of the check valve body, the noise reduction mechanism comprises a back plate, which is arranged inside the check valve body, the back plate is used to reduce the contact surface of the valve body, a movable plate is arranged above the back plate, the movable plate is used to buffer the collision force of the valve body, and a spring is arranged above the movable plate, which is used for automatic return of the movable plate.

[0007] Preferably, a rotating member is disposed on the inner side wall of the check valve body, the outside of the rotating member is rotatably connected to a rotating rod, and the valve body is disposed outside the rotating rod.

[0008] Preferably, a connection block is fixedly connected to the outside of the valve body, and the outer surface of the connection block is in contact with the outer surface of the abutment plate.

[0009] Preferably, a sliding rod is fixedly connected to the upper surface of the movable plate, and the spring is movably sleeved on the outside of the sliding rod.

[0010] Preferably, a fixing block is fixedly connected inside the check valve body, the sliding rod is movably inserted inside the fixing block, and the spring is fixedly connected below the fixing block.

[0011] Preferably, an outer plate is fixedly connected to the upper surface of the movable plate, and the outer plate is movably inserted into the interior of the fixed block.

[0012] Preferably, the top end of the outer plate is fixedly connected to a limiting plate, and the limiting plate is fixedly connected to the top end of the sliding rod.

[0013] Preferably, a water inlet hole is provided on the outer surface of the outer plate, and a shock absorbing plate is inserted into the interior of the abutment plate.

[0014] The utility model discloses a welding check valve, which has the following beneficial effects: when water flows through the inside of the check valve body, the water flow pressure will push the valve body, and the valve body will automatically open under the water flow pressure; if the water flow pressure is relatively large, the connecting block will hit the abutment plate; when the abutment plate is hit, the movable plate will move upward, and at the same time, the movable plate will squeeze the spring together with the fixed block, and at the same time, the sliding rod will slide inside the fixed block; if the water flow pressure is reduced, the valve body will move slightly downward, and at this time, the movable plate will also reduce the squeezing force on the spring, and this is repeated, and the contact surface between the valve body and the connecting block is reduced by setting the abutment plate, and then the upward impact of the valve body is reduced by the movable plate and the spring, thereby reducing the noise caused by the change in water flow pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is an exploded view of the internal structure of the main body of the check valve of the utility model;

[0018] Figure 3 This is a schematic diagram of the external structure of the valve body of the utility model;

[0019] Figure 4 This is an exploded view of the external structure of the movable plate of the utility model;

[0020] Figure 5 It is a schematic diagram of the structure of the outer part of the abutment plate of the utility model.

[0021] In the figure: 1. check valve body; 101. valve body; 102. rotating member; 103. rotating rod; 2. abutment plate; 201. moving plate; 202. spring; 203. fixed block; 204. sliding rod; 205. outer plate; 206. water inlet hole; 207. limit plate; 208. shock-absorbing plate; 209. connecting block. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model is described clearly and completely. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.

[0023] The embodiment of the present application provides a welding check valve, which solves the problem that the existing welding check valve is affected by the liquid flow pressure and repeatedly hits the baffle to generate continuous noise after the valve is opened.

[0024] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] The utility model embodiment discloses a welding check valve.

[0026] According to the attached Figure 1-5 As shown, a check valve body 1 can refer to a check valve with model number h61y-250, a valve body 101 is arranged inside the check valve body 1, a noise reduction mechanism is arranged inside the check valve body 1, the noise reduction mechanism is used to reduce the internal noise of the check valve body 1, the noise reduction mechanism includes a back plate 2, which is arranged inside the check valve body 1, the back plate 2 is used to reduce the contact surface of the valve body 101, a moving plate 201 is arranged above the back plate 2, the moving plate 201 is used to buffer the collision force of the valve body 101, a spring 202 is arranged above the moving plate 201, and the spring 202 is used for the automatic return of the moving plate 201.

[0027] When water flows through the inside of the check valve body 1, the water pressure will push the valve body 101, and the valve body 101 will automatically open due to the water pressure. At this time, the valve body 101 will drive the rotating rod 103 to rotate outside the rotating member 102. If the water pressure is large, the valve body 101 will move to the lower position of the abutment plate 2, and the connecting block 209 will hit the abutment plate 2. When the abutment plate 2 is hit, the movable plate 201 will move upward, and the movable plate 201 will squeeze the spring 202 together with the fixed block 203, and the sliding rod 204 will slide inside the fixed block 203. If the water pressure decreases, the valve body 101 will move slightly downward, and the movable plate 201 will also reduce the squeezing force on the spring 202, and this will be repeated.

[0028] The inner wall of the check valve body 1 is provided with a rotating member 102, the outer part of the rotating member 102 is rotatably connected to a rotating rod 103, the valve body 101 is arranged on the outside of the rotating rod 103, the outer part of the valve body 101 is fixedly connected to a connecting block 209, and the outer surface of the connecting block 209 contacts the outer surface of the abutment plate 2.

[0029] When water flows through the inside of the check valve body 1, the forward momentum of the water flow opens the valve body 101. After the valve body 101 rotates upward and opens, it will contact the fixed plate. The fixed plate prevents the valve from continuing to rotate upward. If the water flow flows back, the valve body 101 will rotate in the opposite direction due to the water flow pressure and close.

[0030] The upper surface of the movable plate 201 is fixedly connected with a sliding rod 204, and the spring 202 is movably sleeved on the outside of the sliding rod 204. The inside of the check valve body 1 is fixedly connected with a fixed block 203, and the sliding rod 204 is movably inserted into the inside of the fixed block 203. The spring 202 is fixedly connected below the fixed block 203.

[0031] The contact surface between the valve body 101 and the connecting block 209 is reduced by providing the abutment plate 2, and then the upward impact of the valve body 101 is reduced by the moving plate 201 and the spring 202, thereby reducing the noise caused by the change of water flow pressure.

[0032] The upper surface of the movable plate 201 is fixedly connected to an outer plate 205, and the outer plate 205 is movably inserted into the interior of the fixed block 203. The top of the outer plate 205 is fixedly connected to a limiting plate 207, and the limiting plate 207 is fixedly connected to the top of the sliding rod 204. A water inlet hole 206 is provided on the outer surface of the outer plate 205, and a shock-absorbing plate 208 is inserted into the interior of the abutment plate 2.

[0033] By setting the spring 202, the spring 202 can drive the movable plate 201 to return to its original position automatically, while reducing the upward impact of the valve body 101, and drive the abutment plate 2 to move with the valve body 101 when the water flow changes, thereby preventing the valve body 101 from repeatedly colliding with the abutment plate 2, and a shock-absorbing plate 208 is arranged inside the abutment plate 2, and the shock-absorbing plate 208 can share the vibration of the abutment plate 2 when the abutment plate 2 is hit.

[0034] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0035] When water flows through the inside of the check valve body 1, the water pressure will push the valve body 101, and the valve body 101 will automatically open due to the water pressure. If the water pressure is large, the connecting block 209 will hit the abutment plate 2. When the abutment plate 2 is hit, the movable plate 201 will move upward, and at the same time, the movable plate 201 will squeeze the spring 202 together with the fixed block 203, and the sliding rod 204 will slide inside the fixed block 203. If the water pressure decreases, the valve body 101 will move slightly downward. At this time, the movable plate 201 will also reduce the squeezing force on the spring 202, and this is repeated. By setting the abutment plate 2 to reduce the contact area with the connecting block 209, the upward impact of the valve body 101 is reduced by the movable plate 201 and the spring 202, thereby reducing the noise caused by the change in water pressure.

[0036] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A welding check valve, comprising a check valve body (1), wherein a valve body (101) is arranged inside the check valve body (1), characterized in that: A noise reduction mechanism is arranged inside the check valve body (1), and the noise reduction mechanism is used to reduce the internal noise of the check valve body (1). The noise reduction mechanism comprises: An abutment plate (2) is arranged inside the check valve body (1), and the abutment plate (2) is used to reduce the contact surface of the valve body (101); A movable plate (201) is arranged above the abutment plate (2), and the movable plate (201) is used to buffer the collision force of the valve body (101); A spring (202) is arranged above the moving plate (201), and the spring (202) is used for automatically returning the moving plate (201).

2. A welding check valve according to claim 1, characterized in that: The inner side wall of the check valve body (1) is provided with a rotating member (102), the outside of the rotating member (102) is rotatably connected to a rotating rod (103), and the valve body (101) is arranged outside the rotating rod (103).

3. A welding check valve according to claim 1, characterized in that: A connection block (209) is fixedly connected to the outside of the valve body (101), and the outer surface of the connection block (209) is in contact with the outer surface of the abutment plate (2).

4. A welding check valve according to claim 1, characterized in that: The upper surface of the movable plate (201) is fixedly connected to a sliding rod (204), and the spring (202) is movably sleeved on the outside of the sliding rod (204).

5. A welding check valve according to claim 4, characterized in that: A fixed block (203) is fixedly connected inside the check valve body (1), the sliding rod (204) is movably inserted inside the fixed block (203), and the spring (202) is fixedly connected below the fixed block (203).

6. A welding check valve according to claim 1, characterized in that: The upper surface of the movable plate (201) is fixedly connected to an outer plate (205), and the outer plate (205) is movably inserted into the interior of the fixed block (203).

7. A welding check valve according to claim 6, characterized in that: The top end of the outer plate (205) is fixedly connected to a limiting plate (207), and the limiting plate (207) is fixedly connected to the top end of the sliding rod (204).

8. A welding check valve according to claim 6, characterized in that: The outer surface of the outer plate (205) is provided with a water inlet hole (206), and a shock absorbing plate (208) is inserted into the interior of the abutment plate (2).

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