Spherical check valve

Abstract

A ball check valve comprises a water inlet end valve body, a middle valve body, a water outlet end valve body and a ball cage installed in the middle valve body, the ball cage comprises a water inlet hole plate connected with the water inlet end valve body, the water inlet hole plate is connected with a water outlet hole plate through at least one set of connecting rods, and overflowing holes are correspondingly formed in the water inlet hole plate and the water outlet hole plate. Each group of connecting rods at least comprises three connecting rods, and the connecting rods are uniformly distributed along the center of the overflowing hole; a rubber ball which is matched with the overflowing hole of the water inlet hole plate to realize sealing is arranged between each group of connecting rods; each connecting rod is fixedly provided with a shock pad, and the lower surfaces of the shock pads on the same group of connecting rods on the rubber ball side are located on the same plane. According to the spherical check valve, efficient sealing and effective damping of the valve are achieved through the unique design of the ball cage and the installation mode of the damping pad, the service life of the valve is prolonged, and the stability of the valve is improved. Meanwhile, the valve further has the advantages and effects of being convenient to mount and dismount, high in strength, high in pressure resistance, high in stability, high in reliability and the like.

Description

Technical Field

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

[0002] A check valve is a valve used to prevent fluid backflow and is widely used in various fluid pipeline systems. However, existing check valve designs focus more on the valve's switching function and pressure resistance, and less on the valve's vibration resistance and noise. In practical applications, the valve's sealing performance directly affects the operating efficiency and safety of the pipeline system, while the valve's vibration resistance affects the valve's service life and stability, and noise affects the working environment. Therefore, how to provide a check valve that has both good sealing performance and can effectively resist vibration and reduce noise is an urgent problem to be solved in the field of valve technology.

[0003] Among various check valves, ball check valves are widely used due to their compact structure, small flow resistance and fast closing.

[0004] The ball check valve is a check valve with multiple balls and multiple flow channels, which is mainly composed of a front and rear valve body, a rubber ball, etc. For example, the prior art discloses an energy-saving slow-closing ball check valve, and its publication number is CN201391651Y; its working principle is: the rubber ball rolls in a short stroke in the ball cover to realize the opening and closing of the valve. When the water pump is started, the water under the action of pressure flushes the rubber ball, causing the rubber ball to roll to the right side, and the check valve opens; after the pump stops, due to the return water pressure in the pipeline system, the rubber ball is forced to roll to the left water inlet end valve body, achieving the check closure.

[0005] However, traditional ball check valves still have some problems in certain specific application scenarios, such as high vibration and high pressure environments, such as insufficient sealing performance, susceptibility to vibration damage, and high noise.

[0006] The present application optimizes and improves the problem of high noise of a ball check valve, and proposes a ball check valve with a shock-absorbing effect. Utility Model Content

[0007] In view of the problems existing in the prior art, the utility model provides a spherical check valve which has a simple structure, reduces noise and has high safety performance.

[0008] The utility model is implemented as follows: a ball check valve includes an inlet valve body, a middle valve body, an outlet valve body, and a ball cage installed in the middle valve body. The ball cage includes an inlet orifice plate connected to the inlet valve body, and the inlet orifice plate is connected to the outlet orifice plate through at least one group of connecting rods. The inlet orifice plate and the outlet orifice plate are provided with corresponding flow holes, and each group of connecting rods includes at least three connecting rods, and the connecting rods are evenly distributed along the center of the flow holes; a rubber ball is provided between each group of connecting rods to cooperate with the flow holes of the inlet orifice plate to achieve sealing; a shock-absorbing pad is fixedly installed on each connecting rod, and the lower surface of the shock-absorbing pad on the same group of connecting rods on the rubber ball side is located on the same plane. Preferably, a limit ring is fixedly provided on the connecting rod near the outlet end, and the shock-absorbing pad abuts the limit ring.

[0009] Preferably, one end of the connecting rod is threaded or welded on the water inlet orifice plate, and the other end of the connecting rod extends out of the water outlet orifice plate, and a locking nut is screwed on the end of the connecting rod.

[0010] Preferably, the rubber ball comprises a hollow steel ball, and the outer surface of the hollow steel ball is coated with rubber.

[0011] The utility model has the advantages and technical effects: in the utility model, by arranging the shock-absorbing pads on the connecting rods, and the lower surfaces of the shock-absorbing pads on the same group of connecting rods are located on the same plane, so that when the valve is vibrated, the shock-absorbing pads can effectively absorb and disperse the vibration energy, thereby protecting the valve from damage and improving the service life and stability of the valve. At the same time, by arranging the rubber ball to cooperate with the flow hole of the water inlet orifice plate to achieve sealing, the sealing performance of the valve can be greatly improved to prevent fluid leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 It is a schematic diagram of the structure of the utility model;

[0014] Figure 3 It is a schematic diagram of the matching structure of the ball cage and the rubber ball;

[0015] Figure 4 It is a three-dimensional diagram of the ball cage and the rubber ball.

[0016] In the figure, 1. Water inlet valve body; 2. Middle valve body; 3. Water outlet valve body; 4. 球笼 ; 4-1, water inlet orifice plate; 4-2, water outlet orifice plate; 4-3, flow hole; 4-4, connecting rod; 5, rubber ball; 6, shock-absorbing pad; 7, limit ring; 8, locking nut. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in combination with the embodiments below. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0018] See also Figures 1 to 4 A ball check valve comprises an inlet valve body 1, a middle valve body 2, an outlet valve body 3, and a ball cage 4 installed in the middle valve body, wherein the ball cage comprises an inlet orifice plate 4-1 connected to the inlet valve body, and the inlet orifice plate is connected to the outlet orifice plate 4-2 through at least one group of connecting rods, and the present application has four groups; the inlet orifice plate and the outlet orifice plate are correspondingly provided with flow holes 4-3, and each group of connecting rods comprises at least three connecting rods 4-4, and the present application has four connecting rods, and the connecting rods are evenly distributed along the center of the flow holes; a rubber ball 5 is provided between each group of connecting rods to cooperate with the flow hole of the inlet orifice plate to achieve sealing; a shock-absorbing pad 6 is fixedly installed on each connecting rod, and the lower surface of the shock-absorbing pad on the same group of connecting rods on the rubber ball side is located on the same plane.

[0019] Preferably, a limiting ring 7 is fixedly provided on the connecting rod near the water outlet, and the shock-absorbing pad abuts against the limiting ring. By providing the limiting ring, the movement range of the shock-absorbing pad can be limited to prevent it from shifting due to vibration, thereby ensuring the stability and reliability of the shock-absorbing effect.

[0020] Preferably, one end of the connecting rod is threaded or welded on the water inlet orifice plate, and the other end of the connecting rod extends out of the water outlet orifice plate, and a locking nut 8 is screwed on the end of the connecting rod. The connecting rod is fixed to the water inlet orifice plate by threading or welding, and the other end of the connecting rod is fixed to the water outlet orifice plate by a locking nut, which can facilitate the installation and removal of the valve, and also ensure the firmness and stability of the connection.

[0021] Preferably, the rubber ball comprises a hollow steel ball, and the outer surface of the hollow steel ball is coated with rubber. The use of a hollow steel ball and the outer surface of the hollow steel ball coated with rubber can not only ensure the strength and pressure resistance of the rubber ball, but also achieve good sealing with the flow hole through the elasticity of the rubber.

[0022] In summary, the spherical check valve of the utility model realizes efficient sealing and effective shock absorption of the valve through the unique ball cage design and the installation method of the shock-absorbing pad, thereby improving the service life and stability of the valve. At the same time, the valve also has the advantages and effects of convenient installation and disassembly, high strength and pressure resistance, stability and reliability.

[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A ball check valve, comprising an inlet valve body, a middle valve body, and an outlet valve body, characterized in that: A ball cage installed in the middle valve body, the ball cage includes an inlet orifice plate connected to the water inlet end valve body, the inlet orifice plate is connected to the outlet orifice plate by at least one group of connecting rods, the inlet orifice plate and the outlet orifice plate are correspondingly provided with flow holes, each group of connecting rods includes at least three connecting rods, and the connecting rods are evenly distributed along the center of the flow holes; between each group of connecting rods are provided rubber balls that cooperate with the flow holes of the inlet orifice plate to achieve sealing; each connecting rod is fixedly installed with a shock-absorbing pad, and the lower surface of the shock-absorbing pad on the same group of connecting rods on the rubber ball side is located on the same plane.

2. The ball check valve according to claim 1, characterized in that: A limiting ring is fixedly provided on the connecting rod near the water outlet end, and the shock-absorbing pad abuts against the limiting ring.

3. The ball check valve according to claim 1, characterized in that: One end of the connecting rod is threaded or welded on the water inlet orifice plate, and the other end of the connecting rod extends out of the water outlet orifice plate. A locking nut is screwed on the end of the connecting rod.

4. The ball check valve according to claim 1, characterized in that: The rubber ball comprises a hollow steel ball, and the outer surface of the hollow steel ball is covered with rubber.

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