Check valve with automatic adjustment function

Abstract

This invention discloses a check valve with automatic adjustment function, relating to the field of check valve technology. It includes a valve body and an inlet pipe and an outlet pipe connected to both ends of the valve body. An elastic element is disposed at the center of the valve body. An inlet valve assembly is installed between the elastic element and the inlet pipe, and an outlet valve assembly is installed between the elastic element and the outlet pipe. When the valve is opened to supply water, the elastic element undergoes lateral deformation due to longitudinal compression. When the valve is closed to stop supplying water, water backflow occurs in the outlet pipe. This backflow pushes the outlet valve disc to rotate clockwise and close. When the outlet valve disc rotates to close due to the reaction force of the water flow, it generates a lateral reset thrust on the laterally deformed elastic element through a reset push plate. This allows the elastic element to be stably reset, significantly improving its service life. Furthermore, it requires no manual intervention and achieves high efficiency with a simple structure.

Description

Technical Field

[0001] This invention relates to the field of check valve technology, specifically a check valve with automatic adjustment function. Background Technology

[0002] A check valve is a type of valve whose opening and closing element is a circular valve disc that relies on its own weight and the pressure of the medium to prevent backflow. It belongs to the category of automatic valves and is also known as a non-return valve, one-way valve, reflux valve, or isolation valve. The valve disc movement is divided into lift type and swing type. A lift check valve is structurally similar to a gate valve, except it lacks the valve stem that drives the valve disc. The medium flows in from the inlet end (bottom) and flows out from the outlet end (top). When the inlet pressure is greater than the sum of the valve disc's weight and its flow resistance, the valve is opened. Conversely, when the medium flows back, the valve is closed. A swing check valve has an angled valve disc that can rotate around an axis, and its working principle is similar to that of a lift check valve. Check valves are commonly used as foot valves in water pumping devices to prevent water backflow. Check valves, when used in combination with gate valves, can provide a safety isolation function.

[0003] Traditional check valves typically use springs as elastic elements. When the positive water pressure is greater than the sum of the spring force and the weight of the valve disc, the water pressure will force the valve disc to compress the spring and open. However, during this period, the spring is only subjected to compression and can only return to its original position by its own elastic force. After long-term use, the spring's return length will be reduced to a certain extent, meaning its elasticity will weaken.

[0004] In existing technologies, manual adjustment is often used to compensate for the reduction in spring elasticity in order to restore elasticity and ensure the normal operation of the valve, thus solving the problem of weakened elasticity. However, manual adjustment is time-consuming and labor-intensive, and it is a "band-aid" solution. That is, after one elasticity compensation and repair, the elasticity reduction problem will continue to occur when the check valve is used again. Moreover, the amount of manual adjustment is limited. Once a certain degree is reached, the elasticity cannot be restored. Therefore, the lifespan of the spring is limited, and frequent use will greatly reduce the lifespan of the spring.

[0005] Therefore, in general, the problem that this invention aims to solve regarding check valves is the limited service life of the elastic components in check valves, which necessitates frequent manual adjustment or replacement.

[0006] The underlying principle of this invention for improving the service life of elastic components is as follows: when an elastic component is compressed by force at a certain angle, another force pushes the elastic component back from the direction of deformation, achieving an effect of automatic adjustment and repair of deformation, so that the elastic component can be better reset and its service life can be effectively increased. Simply put, after the spring is compressed, it is reset by stretching the spring with external force to "neutralize" the reduction after the elastic component is deformed.

[0007] To address the aforementioned issues, there is an urgent need for innovative design based on the existing check valve. Summary of the Invention

[0008] This invention addresses the problem of overly simplistic solutions in existing technologies by providing a significantly different solution. Specifically, the invention aims to provide a check valve with an automatic adjustment function. This addresses the issue mentioned in the background section where existing technologies often rely on manual adjustment to compensate for spring shrinkage and restore elasticity, ensuring normal valve operation. However, manual adjustment is time-consuming and labor-intensive, and it only addresses the symptoms, not the root cause. Even after initial elasticity compensation, the problem of elasticity shrinkage recurs with continued use of the check valve. Furthermore, the amount of manual adjustment is limited; once a certain point is reached, elasticity cannot be restored, resulting in a limited spring lifespan. Frequent use further shortens the spring's lifespan.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a check valve with automatic adjustment function, comprising a valve body and an inlet pipe and an outlet pipe respectively connected to both ends of the valve body, wherein an elastic element is provided at the center of the valve body, and an inlet valve assembly is installed between the elastic element and the inlet pipe, and an outlet valve assembly is installed between the elastic element and the outlet pipe.

[0010] Preferably, the inlet valve assembly includes an inlet valve disc, a compression baffle, a first slide groove, a first slide rod, and a first rotating plate. The inlet valve disc is hinged at the interface between the valve body and the water inlet pipe. One side of the inlet valve disc is attached to the water inlet end of the water inlet pipe. The compression baffle is hinged inside the valve body. The compression baffle has a first slide groove inside. One end of the first slide rod is slidably disposed inside the first slide groove. The other end of the first slide rod is hinged to the first rotating plate. One side of the compression baffle is attached to the outer wall of the elastic element.

[0011] Preferably, the end of the first rotating plate is hinged to the inlet valve disc, and a first sealing ring is provided between the inlet valve disc and the interface of the water inlet pipe, which is adhered to the side wall of the inlet valve disc.

[0012] Preferably, the outlet valve assembly includes an outlet valve disc, a reset push plate, a second slide groove, a second slide rod, and a second rotating plate. The outlet valve disc is hinged at the interface between the valve body and the outlet pipe, and one side of the outlet valve disc is attached to the outlet end of the outlet pipe. The reset push plate is hinged inside the valve body, and the reset push plate has a second slide groove inside. One end of the second slide rod is slidably disposed inside the second slide groove, and the other end of the second slide rod is hinged to the second rotating plate. One side of the reset push plate is attached to the outer wall of the elastic element.

[0013] Preferably, the end of the second rotating plate is hinged to the outlet valve disc, and a second sealing ring is provided between the outlet valve disc and the outlet pipe, which is adhered to the side wall of the outlet valve disc.

[0014] Preferably, the upper end of the valve body has a through groove for removing and replacing the elastic element, and a sealing cover plate is fixed to the outside of the through groove by a seal and bolts, and the elastic element is attached to the inner side of the sealing cover plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] When both the inlet and outlet valves are opened simultaneously, the water flow from the inlet pipe is stably delivered to the outlet pipe through the valve body. As the water pressure inside the inlet pipe increases, the opening angles of the inlet and outlet valves also increase adaptively, achieving an automatic adjustment of the water flow. Based on force analysis, when the valves are open to deliver water, the elastic element undergoes lateral deformation due to longitudinal compressive force. When the valves are closed to stop water delivery, water will flow backward in the outlet pipe. This backflow will push the outlet valve to rotate clockwise and close. Furthermore, when the outlet valve rotates to close under the reaction force of the water flow, it will... The reset push plate generates a lateral reset thrust on the elastic element that has undergone lateral deformation, thereby enabling the elastic element to be stably reset. Simply put, for a spherical elastic element, it is first squeezed longitudinally and then squeezed laterally to reset it, thereby automatically neutralizing and repairing the reduction after the elastic element is deformed, thus improving the service life of the elastic element. It does not require manual intervention and has the effect of achieving high efficiency with a simple structure. Moreover, the inlet valve and outlet valve opened by the water flow have a flow guiding effect, which can alleviate the problem of water pressure reduction caused by traditional valves to a certain extent. Attached Figure Description

[0017] Figure 1 This is a frontal cross-sectional view of the valve of the present invention when it is closed;

[0018] Figure 2 This is a frontal cross-sectional view of the valve of the present invention when it is open;

[0019] Figure 3 This is a schematic diagram illustrating the force analysis of the elastic element during the opening and closing of the valve in this invention.

[0020] Figure 4 This is an enlarged structural schematic diagram of the inlet valve assembly of the present invention;

[0021] Figure 5 This is an enlarged structural schematic diagram of the outlet valve assembly of the present invention;

[0022] Figure 6 This is a schematic diagram of the elastic element structure in Embodiment 1 of the present invention;

[0023] Figure 7This is a schematic diagram of the elastic element structure in Embodiment 2 of the present invention.

[0024] In the diagram: 1. Valve body; 2. Inlet pipe; 3. Outlet pipe; 4. Inlet valve disc; 41. First sealing ring; 42. Extrusion baffle; 43. First slide groove; 44. First slide rod; 45. First rotating plate; 5. Outlet valve disc; 51. Second sealing ring; 52. Reset push plate; 53. Second slide groove; 54. Second slide rod; 55. Second rotating plate; 6. Elastic element; 61. Sealing cover plate. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please see Figure 1-7 The present invention provides a technical solution: a check valve with automatic adjustment function, including a valve body 1 and an inlet pipe 2 and an outlet pipe 3 respectively connected to the two ends of the valve body 1. An elastic element 6 is provided at the center inside the valve body 1, and an inlet valve assembly is installed between the elastic element 6 and the inlet pipe 2, and an outlet valve assembly is installed between the elastic element 6 and the outlet pipe 3.

[0027] The inlet valve assembly includes an inlet valve disc 4, a compression baffle 42, a first slide groove 43, a first slide rod 44, and a first rotating plate 45. The inlet valve disc 4 is hinged at the interface between the valve body 1 and the inlet pipe 2. One side of the inlet valve disc 4 is attached to the inlet end of the inlet pipe 2. The compression baffle 42 is hinged inside the valve body 1. The compression baffle 42 has a first slide groove 43 inside. One end of the first slide rod 44 is slidably arranged inside the first slide groove 43. The other end of the first slide rod 44 is hinged to the first rotating plate 45. One side of the compression baffle 42 is connected to the outer side of the elastic member 6. With the wall-fitted connection, as water gradually enters the inlet pipe 2 and the water pressure gradually increases until it reaches the elastic limit of the elastic element 6, the inlet valve disc 4 will gradually rotate counterclockwise under the water pressure, opening the inlet valve. When the inlet valve disc 4 rotates counterclockwise, it pushes the first sliding rod 44 through the first rotating plate 45. The first sliding rod 44, through its adaptive sliding within the first sliding groove 43, synchronously pushes the compression baffle 42 to rotate adaptively counterclockwise. When the compression baffle 42 rotates counterclockwise, it exerts a compression effect on the elastic element 6, causing the elastic element 6 to undergo a compression action. Figure 2 The deformation shown.

[0028] The end of the first rotating plate 45 is hinged to the inlet valve disc 4, and a first sealing ring 41 is provided between the inlet valve disc 4 and the interface of the water inlet pipe 2, which is adhered to the side wall of the inlet valve disc 4.

[0029] The outlet valve assembly includes an outlet valve disc 5, a reset push plate 52, a second slide groove 53, a second slide rod 54, and a second rotating plate 55. The outlet valve disc 5 is hinged at the interface between the valve body 1 and the outlet pipe 3, and one side of the outlet valve disc 5 is attached to the outlet end of the outlet pipe 3. The reset push plate 52 is hinged inside the valve body 1, and the reset push plate 52 has a second slide groove 53 inside. One end of the second slide rod 54 is slidably arranged inside the second slide groove 53, and the other end of the second slide rod 54 is hinged to the second rotating plate 55. One side of the reset push plate 52 is attached to the outer wall of the elastic member 6. When the elastic member 6 deforms, it will push the reset push plate 52, causing the reset push plate 52 to rotate counterclockwise. Similarly, the reset push plate 52 will drive the outlet valve disc 5 to rotate counterclockwise through the second rotating plate 55, thereby opening the outlet valve.

[0030] The end of the second rotating plate 55 is hinged to the outlet valve disc 5, and a second sealing ring 51 is provided between the outlet valve disc 5 and the outlet pipe 3, which is adhered to the side wall of the outlet valve disc 5.

[0031] The upper end of the valve body 1 has a through groove for removing and replacing the elastic element 6, and a sealing cover plate 61 is fixed to the outside of the through groove by a seal and bolts, and the elastic element 6 is attached to the inner side of the sealing cover plate 61.

[0032] Working principle: When using this check valve with automatic adjustment function, if... Figure 1 As shown, when water gradually enters the inlet pipe 2 and the water pressure gradually increases until it reaches the elastic limit of the elastic element 6, the inlet valve disc 4 will gradually rotate counterclockwise under the action of water pressure, opening the inlet valve. When the inlet valve disc 4 rotates counterclockwise, it pushes the first sliding rod 44 through the first rotating plate 45. The first sliding rod 44, through its adaptive sliding within the first sliding groove 43, synchronously pushes the compression baffle 42 to rotate adaptively counterclockwise. When the compression baffle 42 rotates counterclockwise, it exerts a compression effect on the elastic element 6, causing the elastic element 6 to undergo the following action: Figure 2 The deformation shown indicates that when the elastic element 6 deforms, it will push the reset push plate 52, causing the reset push plate 52 to rotate counterclockwise in an adaptive manner. Similarly, the reset push plate 52 will drive the outlet valve disc 5 to rotate counterclockwise in an adaptive manner through the second rotating plate 55, thereby opening the outlet valve.

[0033] When both inlet and outlet valves are opened simultaneously, the water flow from inlet pipe 2 will be stably delivered to outlet pipe 3 through valve body 1. Furthermore, as the water pressure inside inlet pipe 2 increases, the opening angles of inlet valve disc 4 and outlet valve disc 5 will also increase accordingly, achieving an automatic adjustment of the water flow rate. In addition, as... Figure 3A force analysis of the elastic element 6 reveals that when the valve is open to supply water, the elastic element 6 undergoes lateral deformation due to longitudinal compression. When the valve is closed to stop supplying water, water backflow occurs in the outlet pipe 3. This backflow pushes the outlet valve disc 5 to rotate clockwise and close. Furthermore, when the outlet valve disc 5 rotates to close under the reaction force of the water flow, it generates a lateral reset thrust on the laterally deformed elastic element 6 through the reset push plate 52. This allows the elastic element 6 to stably reset. Simply put, for the spherical elastic element 6, it is first longitudinally flattened, and then laterally reset, thus automatically neutralizing and repairing the reduction after deformation. This significantly improves the service life of the elastic element 6 without manual intervention, achieving high efficiency with a simple structure. Moreover, the inlet valve disc 4 and outlet valve disc 5 opened by the water flow have a guiding effect, which can alleviate the problem of water pressure reduction caused by traditional valves to a certain extent.

[0034] Appendix Figure 1 and attached Figure 2 The elastic element 6 in the middle is a common elastic ball, which has limited elastic strength. For check valves that require high water pressure to open, it can be replaced with an auxiliary elastic ball. Figure 6 , 7 The elastic element 6 in the middle. Example 1

[0035] Appendix Figure 6 The elastic element 6 is made of a spherical mesh woven from elastic metal wires. Ordinary elastic balls are placed in the cavity inside the spherical mesh. The metal wires also have restoring elasticity. The restoring ability of the internal elastic balls is enhanced by wrapping the metal wires, thereby improving the overall elastic strength of the elastic element 6. This allows the elastic element 6 to be installed and used in valve bodies 1 with higher water pressure requirements. Example 2

[0036] If it is necessary to further enhance the elastic strength of the elastic element 6 in Embodiment 1 to adapt to valve body 1 with higher water pressure requirements, the attached element can be... Figure 7 The elastic element 6 shown is installed in the valve body 1. Multiple sets of U-shaped grooves are evenly arranged around the outside of the elastic ball, and a U-shaped elastic element is inserted and fitted inside each U-shaped groove. When the whole is compressed, the U-shaped elastic element at the corresponding angle will also undergo compression deformation along with the elastic ball. Thus, the elastic strength of the elastic ball can be further improved by using the U-shaped elastic element that can undergo elastic deformation and reset simultaneously. This allows the elastic element 6 to adapt to valve body 1 with higher water pressure requirements. Moreover, the U-shaped elastic element can be removed and replaced with a metal spring with higher elasticity to further increase the strength of the elastic element 6.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A check valve with automatic adjustment function, comprising a valve body (1) and a water inlet pipe (2) and a water outlet pipe (3) connected to both ends of the valve body (1) respectively, characterized in that: An elastic element (6) is provided at the center of the valve body (1), and an inlet valve assembly is installed between the elastic element (6) and the inlet pipe (2), and an outlet valve assembly is installed between the elastic element (6) and the outlet pipe (3). The inlet valve assembly includes an inlet valve disc (4), a squeeze baffle (42), a first slide groove (43), a first slide rod (44), and a first rotating plate (45). The inlet valve disc (4) is hinged at the interface between the valve body (1) and the water inlet pipe (2). One side of the inlet valve disc (4) is attached to the water inlet end of the water inlet pipe (2). The squeeze baffle (42) is hinged inside the valve body (1). The squeeze baffle (42) has a first slide groove (43) inside. One end of the first slide rod (44) is slidably arranged inside the first slide groove (43). The other end of the first slide rod (44) is hinged to the first rotating plate (45). One side of the squeeze baffle (42) is attached to the outer wall of the elastic element (6). The outlet valve assembly includes an outlet valve disc (5), a reset push plate (52), a second slide groove (53), a second slide rod (54), and a second rotating plate (55). The outlet valve disc (5) is hinged at the interface between the valve body (1) and the outlet pipe (3), and one side of the outlet valve disc (5) is attached to the outlet end of the outlet pipe (3). The reset push plate (52) is hinged inside the valve body (1), and the reset push plate (52) has a second slide groove (53) inside. One end of the second slide rod (54) is slidably arranged inside the second slide groove (53), and the other end of the second slide rod (54) is hinged to the second rotating plate (55). One side of the reset push plate (52) is attached to the outer wall of the elastic member (6).

2. The check valve with automatic adjustment function according to claim 1, characterized in that: The end of the first rotating plate (45) is hinged to the inlet valve disc (4), and a first sealing ring (41) is provided between the inlet valve disc (4) and the water inlet pipe (2) and is adhered to the side wall of the inlet valve disc (4).

3. A check valve with automatic adjustment function according to claim 1, characterized in that: The end of the second rotating plate (55) is hinged to the outlet valve disc (5), and a second sealing ring (51) is provided between the outlet valve disc (5) and the outlet pipe (3) at the interface. The sealing ring is adhered to the side wall of the outlet valve disc (5).

4. A check valve with automatic adjustment function according to claim 1, characterized in that: The upper end of the valve body (1) has a through groove for removing and replacing the elastic element (6), and a sealing cover plate (61) is fixed to the outside of the through groove by a seal and bolts, and the elastic element (6) is attached to the inner side of the sealing cover plate (61).

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