Vibration damping check valve

Abstract

The utility model discloses a damping check valve, belongs to the technical field of valves, and solves the problem that before a lifting check valve is opened, a valve core blocks a flow channel in a valve body, and when fluid impacts on the valve body at the first time, the whole check valve still vibrates. Comprising a valve body with a flow channel, an upper connecting part and a lower connecting part are integrally formed in the valve body, the length of the upper connecting part is smaller than that of the lower connecting part, the upper connecting part and the lower connecting part form a circular-tube-shaped structure, the end face of the circular-tube-shaped structure is an inclined face, the valve element is arranged in an inclined mode, and the flow channel is communicated with the flow channel. When the valve element blocks the flow channel, the valve element is attached to the end face of the inclined face of the circular-tube-shaped structure, and the valve element can move in the direction perpendicular to the end face of the inclined face of the circular-tube-shaped structure. When the check valve is impacted by fluid, the valve element is stressed to deflect due to the inclined design of the telescopic rod, elastic potential energy is released, a water hammer is avoided, and sealing and vibration elimination are achieved.

Description

Technical Field

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

[0002] A check valve is an automatic valve mainly used in a pipeline system to prevent the reverse flow of fluid. It consists of components such as a valve body, a valve cover, and a valve core. Its working principle is to control the opening and closing of the valve core by using the pressure difference of the fluid. When the fluid flows forward, the valve core opens to allow the fluid to pass through; while when the fluid attempts to flow backward, the valve core closes to prevent the fluid from flowing back. Check valves are widely used in industries such as water treatment, chemical industry, petroleum, and pharmaceuticals to ensure the safety and normal operation of the system. They have various types, including lift type, swing type, and butterfly type, etc., and each type has its specific application scenarios and advantages. The design of the check valve is simple and the operation is convenient, which is an important component to ensure the normal operation of the pipeline system.

[0003] Among several check valves, the valve body structures of the swing type and the lift type check valves are the most similar. After the fluid knocks open the valve core of the swing type check valve, it is necessary for the fluid flow rate to drop significantly before the valve core can fall downward by its own gravity. While for the lift type check valve, after the fluid pushes the valve core upward, when the acting force of the fluid is less than the gravity of the valve core, the valve core falls to close the flow passage in the valve body again. The closing speed of the lift type check valve is significantly faster than that of the swing type check valve. However, before the lift type check valve opens, when the valve core blocks the flow passage in the valve body and the fluid impacts the valve body for the first time, it will still cause the entire check valve to vibrate, and this vibration will have a negative impact on the assembly firmness of the valve.

[0004] Therefore, a vibration-damping check valve is proposed to solve or alleviate the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to solve the deficiencies existing in the prior art and propose a vibration-damping check valve.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A vibration-damping check valve includes a valve body with a flow passage. An upper connecting part and a lower connecting part are integrally formed in the valve body. The length of the upper connecting part is less than that of the lower connecting part. The upper connecting part and the lower connecting part form a circular tubular structure, and the end face of the circular tubular structure is inclined. It also includes a valve core. The valve core is inclined, and when the valve core blocks the flow passage, the valve core is arranged in a manner that fits the inclined end face of the circular tubular structure, and the valve core can displace along the vertical direction of the inclined end face of the circular tubular structure.

[0008] Preferably, the valve body is integrally formed with a valve seat. An insert ring is detachably connected to the inner circle of the valve seat. A telescopic rod inclinedly arranged is fixedly connected to the inner circle of the insert ring. The central axis of the telescopic rod is perpendicular to the inclined end face of the circular tubular structure. The valve core is arranged on the movable end of the telescopic rod to achieve displacement.

[0009] Preferably, an elastic member is arranged inside the telescopic rod, and the elastic member makes the telescopic rod always maintain the maximum length state.

[0010] Preferably, the upper end of the valve core is always located above the upper connecting part.

[0011] Preferably, the valve core can be deflected in the displacement direction.

[0012] Preferably, an outer hinge seat is fixedly connected to the movable end of the telescopic rod. An inner hinge seat is fixedly connected to the back of the valve core. The outer hinge seat is rotatably connected to the inner hinge seat.

[0013] Preferably, the distance from the upper end of the valve core to its rotation connection is less than the distance from the lower end of the valve core to its rotation connection.

[0014] Preferably, a buffer pad is fixedly connected to the top surface of the upper connecting part, and the buffer pad is made of nitrile rubber material.

[0015] Preferably, it further includes a valve cover fixedly connected to the valve seat.

[0016] The utility model has the following beneficial effects:

[0017] When the check valve of the utility model is impacted by fluid, the inclined design of the telescopic rod causes the valve core to deflect under force, releasing elastic potential energy, avoiding water hammer, and achieving sealing and vibration elimination. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can also be obtained based on these drawings without creative efforts.

[0019] Figure 1 is a schematic structural diagram of the present utility model;

[0020] Figure 2 is Figure 1 an enlarged view of part A in

[0021] 1. Valve body; 2. Lower connecting part; 3. Upper connecting part; 4. Valve seat; 5. Valve cover; 6. Insert ring; 7. Telescopic rod; 8. Outer hinge seat; 9. Inner hinge seat; 10. Valve core; 11. Buffer pad. Detailed implementation manner

[0022] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model claimed, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the scope of protection of the present utility model.

[0024] It should be noted that: Similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0025] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship when the product of the present utility model is normally placed, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0026] In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] A vibration damping check valve, as Figure 1 shown, includes a valve body 1 with a flow channel. The valve body 1 is integrally formed with a valve seat 4, and further includes a valve cover 5 fixedly connected to the valve seat 4.

[0029] As Figure 2 shown, an upper connecting portion 3 and a lower connecting portion 2 are integrally formed in the valve body 1. The length of the upper connecting portion 3 is less than the length of the lower connecting portion 2. The upper connecting portion 3 and the lower connecting portion 2 form a circular tubular structure, and the end face of the circular tubular structure is an inclined surface. It further includes a valve core 10, which is inclined. The upper end of the valve core 10 is always located above the upper connecting portion 3. A buffer pad 11 is fixedly connected to the top surface of the upper connecting portion 3. The buffer pad 11 is made of nitrile rubber. When the valve core 10 blocks the flow channel, the valve core 10 is arranged to fit the inclined end face of the circular tubular structure, and the valve core 10 can displace along the vertical direction of the inclined end face of the circular tubular structure.

[0030] Specifically, as Figure 2 shown, an insert ring 6 is detachably connected to the inner circle of the valve seat 4. An inclined telescopic rod 7 is fixedly connected to the inner circle of the insert ring 6. The central axis of the telescopic rod 7 is perpendicular to the inclined end face of the circular tubular structure. The valve core 10 is arranged on the movable end of the telescopic rod 7 to achieve displacement. An elastic member is arranged in the telescopic rod 7, and the elastic member makes the telescopic rod 7 always maintain the maximum length state.

[0031] At the same time, as Figure 2 shown, the valve core 10 can be deflected in the displacement direction. An outer hinge seat 8 is fixedly connected to the movable end of the telescopic rod 7. An inner hinge seat 9 is fixedly connected to the back surface of the valve core 10. The outer hinge seat 8 and the inner hinge seat 9 are rotatably connected. The distance from the upper end of the valve core 10 to its rotation connection is less than the distance from the lower end of the valve core 10 to its rotation connection.

[0032] In the actual application of the present utility model, when the fluid impacts the valve core 10, since the telescopic rod 7 is inclined, part of the impact force of the fluid on the valve core 10 will have a component force acting in the length direction of the telescopic rod 7, thereby causing the telescopic rod 7 to collapse, and compressing and accumulating elastic potential energy in the elastic member that is actually a spring in the telescopic rod 7. As a result, there is a distance between the valve core 10 and the end faces of the upper connecting portion 3 and the lower connecting portion 2, and the distance from the lower end of the valve core 10 to its rotation connection is greater than the distance from the upper end of the valve core 10 to its rotation connection. Therefore, the lower end of the valve core 10 has a larger force-bearing area. Thus, when the valve core 10 deflects, it also rotates counterclockwise, so that the flow channel is opened. At this time, if it is opened, the upper end of the valve core 10 can also deflect and impact on the buffer pad 11, thereby avoiding the situation of the valve core 10 being knocked and broken. When the fluid flow rate decreases, the elastic member can release the elastic potential energy in the telescopic member. At the same time, the lower end of the valve core 10 rotates clockwise due to its relatively large self-weight. Thus, the valve core 10 is re-fitted on the inclined end face of the circular tubular structure formed by the upper connecting portion 3 and the lower connecting portion 2, and the telescopic rod 7 always abuts against the valve core 10, making the valve core 10 firmly close the flow channel. During the use of this check valve, it can not only maintain a good sealing effect when closing the flow channel subsequently, but also will not have a large water hammer phenomenon when the fluid impacts, playing a certain role in vibration damping.

[0033] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A vibration-damping check valve, characterized in that: The invention comprises a valve body (1) with a flow channel, wherein an upper connecting portion (3) and a lower connecting portion (2) are integrally formed in the valve body (1), wherein the length of the upper connecting portion (3) is less than the length of the lower connecting portion (2), wherein the upper connecting portion (3) and the lower connecting portion (2) form a tubular structure, and wherein the end surface of the tubular structure is an inclined surface, and further comprises a valve core (10), wherein the valve core (10) is arranged at an angle, and when the valve core (10) blocks the flow channel, the valve core (10) is arranged to fit the inclined end surface of the tubular structure, and the valve core (10) can be displaced in a direction perpendicular to the inclined end surface of the tubular structure.

2. A vibration damping check valve according to claim 1, characterized in that: The valve body (1) is integrally formed with a valve seat (4); the inner ring of the valve seat (4) is detachably connected to an insert ring (6); the inner ring of the insert ring (6) is fixedly connected to an inclined telescopic rod (7); the central axis of the telescopic rod (7) is perpendicular to the inclined end surface of the circular tubular structure; and the valve core (10) is arranged on the movable end of the telescopic rod (7) to achieve displacement.

3. A vibration damping check valve according to claim 2, characterized in that: An elastic member is arranged inside the telescopic rod (7), and the elastic member enables the telescopic rod (7) to always maintain a maximum length state.

4. A vibration damping check valve according to claim 2, characterized in that: The upper end of the valve core (10) is always located above the upper connecting portion (3).

5. A vibration damping check valve according to claim 4, characterized in that: The valve core (10) can be arranged to be deflected in the displacement direction.

6. A vibration damping check valve according to claim 5, characterized in that: An outer hinge seat (8) is fixedly connected to the movable end of the telescopic rod (7), an inner hinge seat (9) is fixedly connected to the back of the valve core (10), and the outer hinge seat (8) is rotatably connected to the inner hinge seat (9).

7. A vibration damping check valve according to claim 6, characterized in that: The distance between the upper end of the valve core (10) and its rotational connection is smaller than the distance between the lower end of the valve core (10) and its rotational connection.

8. The vibration-damping check valve according to claim 5, characterized in that: A buffer pad (11) is fixedly connected to the top surface of the upper connecting portion (3), and the buffer pad (11) is made of nitrile rubber.

9. A vibration damping check valve according to claim 2, characterized in that: It also includes a valve cover (5) fixedly connected to the valve seat (4).

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