Non-restrictive self-adapting check valve

Abstract

The application discloses a non-resistance self-adaptive check valve, which comprises a valve body, a valve core flap arranged in the valve body, and a rocker connected with the valve core flap. One end of the rocker is hinged to the valve body. The valve body is provided with a valve seat. The valve core flap is provided with a sealing surface matched with the valve seat. The valve core flap comprises a valve core main plate and at least one valve core auxiliary plate abutting against the valve core main plate. The valve core auxiliary plate is located on the side away from the hinged end of the rocker and the valve body. The valve core auxiliary plate is hinged to the valve core main plate or hinged to the valve body. Without large liquid or gas pressure to open the whole valve core main plate, the liquid or gas with small pressure can pass through in the positive direction. After the small valve core auxiliary plate is opened, only the gravity of the valve core auxiliary plate acts on the liquid or gas, so that the energy consumed by the passing fluid and the pressure drop can be greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of machinery, and more particularly to valves for fluid control, especially a non-obstruction adaptive check valve. Background Technology

[0002] Check valves are commonly used in many pipeline transportation processes to prevent the backflow of transported liquids or gases; however, most check valves on the market today are opened by liquid or gas pressure, and the valve plate needs to be kept open by the impact pressure of the flowing liquid or gas, which consumes a considerable amount of energy and causes pressure drop. Although some check valve plates can now be made thinner and lighter, resulting in a smaller pressure drop and lower energy consumption when liquid or gas flows through the valve.

[0003] However, this type of check valve is prone to deformation due to its thin valve plate, which affects the sealing performance of the valve plate and sometimes fails to prevent backflow. To solve this problem, some non-return valves with counterweights or external devices have been designed on the market. However, these non-return valves also have a drawback: the counterweights and external devices are designed to balance the valve plate at a certain angle or position. That is, the valve plate of the check valve must be almost fully open to achieve zero or low resistance. In other words, when the check valve is not operating at full capacity, this type of check valve cannot achieve the function of zero or low resistance. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a non-resistance adaptive check valve that can achieve the function of no resistance or low resistance even when the pipeline is not operating at full load.

[0005] The technical solution of the present invention is to provide a non-obstructive adaptive check valve with the following structure: a valve body, a valve core flap disposed within the valve body, and a rocker arm connected to the valve core flap. One end of the rocker arm is hinged to the valve body. A valve seat is provided within the valve body. The valve core flap has a sealing surface that mates with the valve seat. The valve core flap comprises a main valve core plate and at least one auxiliary valve core plate abutting against the main valve core plate. The auxiliary valve core plate is located on the side away from the hinged end of the rocker arm and the valve body. The auxiliary valve core plate is hinged to the main valve core plate or to the valve body.

[0006] As an improvement of the present invention, the main valve plate is provided with a first connecting post, the auxiliary valve plate is provided with a second connecting post, and a connecting rod connected to the second connecting post is also included, wherein the connecting rod is hinged to the first connecting post.

[0007] As an improvement of the present invention, the main valve plate is provided with a first connecting post, the auxiliary valve plate is provided with a second connecting post, the rocker arm includes a first rod and a second rod arranged coaxially, one end of the first rod is hinged to the valve body and the other end is fixedly connected to the first connecting post, one end of the second rod is hinged to the valve body and the other end is fixedly connected to the second connecting post, and further includes a connecting rod that is clearance-fitted with the second connecting post, the other end of the connecting rod being hinged or fixedly connected to the first connecting post.

[0008] As an improvement of the present invention, the main valve core plate is provided with a first stepped groove, and a first sealing protrusion is provided on the first stepped groove. The auxiliary valve core plate is provided with a second stepped groove that matches the first stepped groove, and a second sealing protrusion that abuts against the first sealing protrusion is provided in the second stepped groove.

[0009] As an improvement of the present invention, the end of the second connecting column is provided with a circular through hole, the inner wall of the circular through hole is provided with an annular protrusion, the end of the connecting rod is provided with a connecting part that fits with the circular through hole with a clearance, and the connecting part is provided with a V-shaped groove that matches the annular protrusion.

[0010] As an improvement of the present invention, the sealing surface has an angle of 75° to 85° with the valve body axis.

[0011] As an improvement of the present invention, one end of the rocker arm is hinged to the valve body and the other end is connected to a balance block or an external device.

[0012] As an improvement of the present invention, the machine body is provided with a drive shaft, the end of the cutter shaft is provided with a limiting groove that matches the drive shaft, and the drive shaft is provided with a limiting ring that abuts against the end of the cutter shaft.

[0013] With the above structure, the unobstructed adaptive check valve of the present invention has the following advantages compared with the prior art: Compared with the traditional unobstructed check valve, it does not require a large liquid or gas pressure to open all the main valve core plates, allowing liquid or gas at a lower pressure to pass through in the forward direction. After opening the smaller auxiliary valve core plate, only the gravity of the auxiliary valve core plate acts on the liquid or gas, which can greatly reduce the energy consumed and pressure drop of the fluid passing through. This allows the pipeline to achieve the function of no resistance or low resistance even when it is not operating at full load. Although the pressure of the smaller auxiliary valve core plate is reduced, the overall mass of the valve core flap and the sealing surface that mates with the valve seat remain unchanged. That is, the sealing performance between the valve seat and the sealing surface is not affected. In other words, when there is no positive or negative pressure, the valve core flap and the valve seat can have good sealing performance. Furthermore, the valve core main plate and the valve core auxiliary plate abut against each other, which can effectively transmit the pressure when the backflow is prevented, ensuring the backflow prevention effect. In addition, the valve core auxiliary plate will not affect the original design structure, so that the check valve can meet the national standard requirements. The structure of the valve core auxiliary plate will not affect the valve core flap or the counterweight balance block or external device connected to the valve core main plate. That is, after the valve plate of the check valve is almost fully or fully open, the valve core main plate and the valve core auxiliary plate are raised together to the fully open position, and can also achieve no resistance or low resistance through the counterweight balance block or external device. Attached Figure Description

[0014] Figure 1 This is a cross-sectional schematic diagram of a non-restrictive adaptive check valve according to the present invention. Figure 1 .

[0015] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0016] Figure 3 This is a cross-sectional schematic diagram of a non-restrictive adaptive check valve according to the present invention. Figure 2 .

[0017] Figure 4 yes Figure 3 Enlarged view of section B in the middle.

[0018] Figure 5 This is a schematic diagram of the second connecting column and the connecting rod.

[0019] As shown in the figure: 100, valve body; 110, valve seat; 200, valve core flap; 210, valve core main plate; 211, first stepped groove; 212, first sealing protrusion; 220, valve core auxiliary plate; 221, second stepped groove; 222, second sealing protrusion; 230, first connecting post; 240, second connecting post; 241, circular through hole; 242, annular protrusion; 250, sealing surface; 300, rocker arm; 310, first rod body; 320, second rod body; 400, connecting rod; 410, connecting part; 411, V-shaped groove. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0021] The unobstructed adaptive check valve according to an embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

[0022] This invention provides a resistance-free adaptive check valve, such as... Figure 1-2 The valve shown includes a valve body 100, a valve core flap 200 disposed within the valve body 100, and a rocker arm 300 connected to the valve core flap 200. One end of the rocker arm 300 is hinged to the valve body 100. A valve seat 110 is provided within the valve body 100. The valve core flap 200 has a sealing surface 250 that mates with the valve seat 110. The valve core flap 200 includes a main valve core 210 and at least one auxiliary valve core plate 220 abutting against the main valve core 210. The auxiliary valve core plate 220 is located on the side away from the hinged end of the rocker arm 300 and the valve body 100. The auxiliary valve core plate 220 is hinged to the main valve core 210. Compared to traditional non-return valves, this design eliminates the need for significant liquid or gas pressure to open the entire main valve core 210, allowing for operation with lower pressure. When liquid or gas flows in the forward direction, and after the smaller auxiliary valve core plate 220 is opened, only the gravity of the auxiliary valve core plate 220 acts on the liquid or gas, which can greatly reduce the energy consumed and pressure drop of the fluid. This allows the pipeline to achieve a resistance-free or low-resistance function even when it is not operating at full load. Although the pressure of the smaller auxiliary valve core plate 220 is reduced, the overall mass of the valve core flap 200 and the sealing surface 250 that mates with the valve seat 110 remain unchanged. That is, the sealing performance between the valve seat 110 and the sealing surface 250 is not affected. In other words, when there is no forward or reverse pressure, the valve core flap 200 and the valve seat 110 can have good sealing performance. Furthermore, the valve core main plate 210 and the auxiliary valve core plate 220 abut against each other, which can effectively transmit the pressure during reverse check and ensure the check effect. Furthermore, the auxiliary valve plate 220 will not affect the original design structure, ensuring that the check valve meets national standards. The structure of the auxiliary valve plate 220 will not affect the counterweight or external device connected to the valve core flap 200 or the main valve core 210. That is, when the check valve plate is almost fully or completely open, the main valve core 210 and the auxiliary valve plate 220 will rise together to the fully open position. This can also be achieved with no or minimal resistance through the counterweight or external device. The external device can be a mechanically driven rotating mechanism capable of applying rotational force, such as a drive shaft that can rotate circumferentially, or a tension force applied in one direction, such as a spring or traction rope. Its purpose is to apply external force to change the position of the main valve core 210.

[0023] In this embodiment, as Figure 2 As shown, the main valve plate 210 is provided with a first connecting post 230, and the auxiliary valve plate 220 is provided with a second connecting post 240. It also includes a connecting rod 400 connected to the second connecting post 240. The connecting rod 400 is hinged to the first connecting post 230. At this time, the second connecting post 240 and the connecting rod 400 are fixedly connected or hinged. When a small pressure liquid or gas passes through in the forward direction, the connecting rod 400 is hinged to the first connecting post 230, allowing the second connecting post 240 and the auxiliary valve plate 220 to rotate relative to the hinged position of the connecting rod 400, thus separating the auxiliary valve plate 220 from the valve seat 110. This allows a small pressure liquid or gas to pass through in the forward direction. When the pressure of the liquid or gas increases during forward passage, it acts on the main valve plate 210 and the auxiliary valve plate 220, causing them to rise together to the fully open position. This can also be achieved with no or minimal resistance through a counterweight or external device.

[0024] In this embodiment, as Figure 2 As shown, the main valve plate 210 has a first stepped groove 211, and a first sealing protrusion 212 is provided on the first stepped groove 211. The auxiliary valve plate 220 has a second stepped groove 221 that matches the first stepped groove 211. The second stepped groove 221 has a second sealing protrusion 222 that abuts against the first sealing protrusion 212. The second stepped groove 221 that matches the first stepped groove 211 can ensure the force-bearing effect and make the sealing effect good. Moreover, the force of the valve plate 210 being balanced by the counterweight or external device can be transmitted to the second stepped groove 221 through the first stepped groove 211. The abutment between the first sealing protrusion 212 and the second sealing protrusion 222 provides a good sealing effect.

[0025] In this embodiment, the sealing surface 250 has an angle of 75° to 85° with the axis of the valve body 100, which can maintain a good sealing effect by gravity. One end of the rocker arm 300 is hinged to the valve body 100 and the other end is connected to a balance block or external device, which can act on the valve core main plate 210 and the valve core auxiliary plate 220. The valve core main plate 210 and the valve core auxiliary plate 220 are lifted together to the fully open position. The counterweight balance block or external device can also achieve no resistance or low resistance.

[0026] This invention provides another type of unobstructed adaptive check valve, such as... Figure 3-5The valve shown includes a valve body 100, a valve core flap 200 disposed within the valve body 100, and a rocker arm 300 connected to the valve core flap 200. One end of the rocker arm 300 is hinged to the valve body 100. A valve seat 110 is provided within the valve body 100. The valve core flap 200 has a sealing surface 250 that mates with the valve seat 110. The valve core flap 200 includes a main valve core 210 and at least one auxiliary valve core plate 220 that abuts against the main valve core 210. The auxiliary valve core plate 220 is located on the side away from the hinged end of the rocker arm 300 and the valve body 100. The auxiliary valve core plate 220 is hinged to the valve body 100. Compared to traditional non-return valves, this design eliminates the need for significant liquid or gas pressure to open the entire main valve core 210, allowing for the release of liquids at lower pressures. When a liquid or gas passes through in the forward direction, and after the smaller auxiliary valve core plate 220 is opened, only the gravity of the auxiliary valve core plate 220 acts on the liquid or gas, which can greatly reduce the energy consumed and pressure drop of the fluid passing through. This allows the pipeline to achieve a function of no resistance or low resistance even when it is not operating at full load. Although the pressure of the smaller auxiliary valve core plate 220 is reduced, the overall mass of the valve core flap 200 and the sealing surface 250 that mates with the valve seat 110 remain unchanged. That is, the sealing performance between the valve seat 110 and the sealing surface 250 is not affected. In other words, when there is no forward or reverse pressure, the valve core flap 200 and the valve seat 110 can have good sealing performance. Furthermore, the valve core main plate 210 and the auxiliary valve core plate 220 abut against each other, which can effectively transmit the pressure during reverse check and ensure the check effect. In addition, the valve core auxiliary plate 220 will not affect the original design structure, so that the check valve can meet the national standard requirements. The structure of the valve core auxiliary plate 220 will not affect the counterweight or external device connected to the valve core flap 200 or the valve core main plate 210. That is, after the valve plate of the check valve is almost fully or fully open, the valve core main plate 210 and the valve core auxiliary plate 220 are raised together to the fully open position, and the counterweight or external device can also achieve no resistance or low resistance.

[0027] In this embodiment, as Figure 4As shown, the main valve plate 210 is provided with a first connecting post 230, and the auxiliary valve plate 220 is provided with a second connecting post 240. The rocker arm 300 includes a first rod body 310 and a second rod body 320 coaxially arranged. One end of the first rod body 310 is hinged to the valve body 100 and the other end is fixedly connected to the first connecting post 230. One end of the second rod body 320 is hinged to the valve body 100 and the other end is fixedly connected to the second connecting post 240. It also includes a connecting rod 400 with a clearance fit to the second connecting post 240. The other end of the connecting rod 400 is hinged or fixedly connected to the first connecting post 230. When a small pressure liquid or gas passes through in the forward direction, it pushes open the smaller auxiliary valve plate 220, and the auxiliary valve plate 220... As the second rod 320 rotates relative to the valve body 100, the second connecting column 240 and the connecting rod 400 do not contact each other and are not under force. When the fluid pressure increases again, the gap between the second connecting column 240 and the connecting rod 400 gradually decreases until they come into contact. The force on the valve core auxiliary plate 220 is transmitted to the connecting rod 400 through the second connecting column 240. That is, the sealing surface 250 of the valve core main plate 210 and the first connecting column 230 are under force together. When the fluid pressure increases to a certain level, the valve core main plate 210 and the valve core auxiliary plate 220 are lifted together to the fully open position. This can also be achieved with no resistance or slight resistance through a counterweight or external device. During the process of lifting to the fully open position, the gap between the second connecting column 240 and the connecting rod 400 gradually increases and then decreases until they come into contact.

[0028] In this embodiment, as Figure 4 As shown, the second connecting column 240 has a circular through hole 241 at its end, and the inner wall of the circular through hole 241 has an annular protrusion 242. The connecting rod 400 has a connecting part 410 at its end that is in clearance fit with the circular through hole 241. The connecting part 410 has a V-shaped groove 411 that matches the annular protrusion 242. The annular protrusion 242 and the V-shaped groove 411 match, which makes the force stable and not easy to deviate. Moreover, due to the small gap and short stroke, no large noise will be generated. The working status of the check valve can be judged by the contact sound.

[0029] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

[0030] For those skilled in the art, various changes and modifications will undoubtedly be apparent after reading the above description. Therefore, the appended claims should be construed as covering all changes and modifications that encompass the true intent and scope of the invention. Any and all equivalent scope and content within the scope of the claims should be considered to remain within the intent and scope of the invention.

Claims

1. A non-obstructive adaptive check valve, comprising a valve body (100), a valve core flap (200) disposed within the valve body (100), and a rocker arm (300) connected to the valve core flap (200), one end of the rocker arm (300) being hinged to the valve body (100), a valve seat (110) being provided within the valve body (100), and the valve core flap (200) being provided with a sealing surface (250) cooperating with the valve seat (110), characterized in that: The valve core flap (200) includes a valve core main plate (210) and at least one valve core auxiliary plate (220) abutting against the valve core main plate (210). The valve core auxiliary plate (220) is located on the side away from the hinge end of the rocker arm (300) and the valve body (100). The valve core auxiliary plate (220) is hinged to the valve core main plate (210) or to the valve body (100). The valve core main plate (210) is provided with a first connecting post (230), and the valve core auxiliary plate (220) is provided with a second connecting post (240). The rocker arm (300) includes a first rod (310) and a second rod (320) arranged coaxially. One end of the first rod (310) is hinged to the valve body (100), and the other end is fixedly connected to the first connecting post (230). One end of the second rod (320) is hinged to the valve body (100), and the other end is fixedly connected to the first connecting post (230). The two connecting posts (240) are fixedly connected, and the connecting rod (400) is also fitted with the second connecting post (240) with a clearance. The other end of the connecting rod (400) is hinged or fixedly connected to the first connecting post (230). The end of the second connecting post (240) is provided with a circular through hole (241). The inner wall of the circular through hole (241) is provided with an annular protrusion (242). The end of the connecting rod (400) is provided with a connecting part (410) that fits with the circular through hole (241) with a clearance. The connecting part (410) is provided with a V-shaped groove (411) that matches the annular protrusion (242).

2. The unobstructed adaptive check valve according to claim 1, characterized in that: The valve core main plate (210) is provided with a first connecting post (230), the valve core auxiliary plate (220) is provided with a second connecting post (240), and also includes a connecting rod (400) connected to the second connecting post (240), the connecting rod (400) being hinged to the first connecting post (230).

3. The unobstructed adaptive check valve according to claim 1, characterized in that: The valve core main plate (210) is provided with a first stepped groove (211), and a first sealing protrusion (212) is provided on the first stepped groove (211). The valve core auxiliary plate (220) is provided with a second stepped groove (221) that matches the first stepped groove (211), and a second sealing protrusion (222) that abuts against the first sealing protrusion (212).

4. The unobstructed adaptive check valve according to claim 1, characterized in that: The sealing surface (250) and the axis of the valve body (100) are at an angle of 75° to 85°.

5. The unobstructed adaptive check valve according to claim 1, characterized in that: One end of the rocker arm (300) is hinged to the valve body (100) and the other end is connected to a balance block or an external device.

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