Swing check valve

Abstract

The utility model belongs to the technical field of valves, and particularly relates to a swing check valve which comprises a valve body, a valve cover and a valve plate, a piston in an assembly groove is connected with a spring, a permanent magnet and a plurality of iron balls in a piston cavity act synergistically, and when normal fluid flows in, the valve plate is opened normally; when a water hammer phenomenon occurs, backflow fluid impacts a valve plate, a piston is stressed to compress a spring for buffering, an iron ball overcomes magnetic force to fly away due to inertia and backflow impact and dissipates energy through collision, backflow is weakened and then is adsorbed back, the water hammer effect is effectively relieved, self-adaptive adjustment is conducted according to the impact strength, and arc-shaped supporting blocks below the two ends of a rotating rod in a valve body guarantee that the rotating rod is stable; according to the check valve, the problem that a traditional check valve is short in water hammer protection and performance is effectively solved, the operation stability and safety of a pipeline system and the reliability and durability of the check valve are improved, and the service life of the check valve is prolonged. The device is widely applicable to multi-field pipeline systems.

Description

TECHNICAL FIELD

[0001] The utility model belongs to valve technical field, specifically is a swing check valve. BACKGROUND

[0002] The swing check valve is a common valve, mainly used for preventing the reverse flow of fluid, and has the characteristics of simple structure, convenient operation and high reliability, and is widely used in the pipeline system of water supply and drainage, chemical industry, petroleum, natural gas and other fields, can effectively protect the system equipment, prevent damage and safety hazards caused by fluid backflow, and plays an important role in industrial production and daily life.

[0003] The existing swing check valve mainly consists of the following parts: valve body, valve cover, valve plate, valve seat, rocker and sealing element, and its working principle is: when the fluid flows in the normal direction, the fluid pressure pushes the valve plate to open around the rocker, smoothly passes through the valve, and once the fluid flows reversely, the valve plate is automatically closed under the action of gravity and reverse flow pressure, tightly fits the valve seat, and prevents the reverse flow of fluid, effectively ensuring the one-way fluid conveying of the pipeline system.

[0004] The existing swing check valve in the prior art has the following shortcomings: in various fluid conveying systems, water hammer phenomenon is a common and harmful problem, the traditional swing check valve on the market has obvious defects when dealing with water hammer effect, lacks an effective protection mechanism specifically for water hammer phenomenon, when water hammer suddenly occurs in the pipeline, the fluid backflow produces a strong impact, the traditional check valve cannot quickly and effectively absorb and disperse energy, which causes the valve plate to be subjected to a great impact force in an instant, is easy to collide with the valve seat violently, not only causes serious wear of the valve plate and the valve seat, shortens the service life of the check valve, but also can cause strong vibration and pressure fluctuation of the pipeline system, which can cause the pipeline to break, the connecting parts to loosen and the related equipment to be damaged, seriously affects the stable operation of the fluid conveying system, increases the system maintenance cost and safety risk; therefore, a swing check valve is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0005] In order to make up for the deficiencies of the existing swing check valve, a swing check valve is proposed.

[0006] The utility model discloses a swing check valve, including the valve body, the valve body includes the entrance and the export, the valve body top fixed assembly has the valve cover, the valve body is rotationally arranged with the valve plate through the rotating rod in, the one side of the valve plate is equipped with the assembly groove and is close to the export, the assembly groove is movably provided with the piston, the spring is terminated between the piston and the assembly groove inner wall, the inside of the piston is provided with the cavity, the one side of the cavity inner wall is fixedly provided with the permanent magnet, a plurality of iron balls are provided in the cavity.

[0007] Preferably, the arc-shaped supporting blocks are fixedly arranged on the inner wall of the valve body below the two ends of the rotating rod.

[0008] Preferably, the sealing seat is fixedly arranged in the valve body at the inlet, and the valve plate is fixedly provided with a sealing gasket matched with the sealing seat.

[0009] Preferably, the buffer is arranged on the inner wall of the valve body at the end of the stroke of the opening of the valve plate.

[0010] Preferably, the cross-shaped reinforcing ribs are fixedly arranged at the top end of the valve cover.

[0011] Preferably, the connecting flanges are fixedly arranged at one end of the inlet and the outlet.

[0012] The utility model discloses a beneficial effect:

[0013] 1. Efficiently relieve water hammer effect

[0014] The check valve of the utility model constructs a set of efficient water hammer energy absorption system through the piston, spring, iron ball and permanent magnet structure, and this design can accurately cope with the water hammer phenomenon and effectively reduce the harm of backflow impact. In actual application, when water hammer occurs in the pipeline, the structure can respond quickly, and the energy absorption degree is self-adaptively adjusted according to the impact strength. The stronger the impact is, the more remarkable the energy absorption effect is, thereby greatly enhancing the resistance of the check valve to the water hammer phenomenon, effectively protecting the pipeline system, significantly improving the operation stability and safety of the pipeline system under complex working conditions, and greatly reducing the risks of pipeline rupture and equipment damage caused by water hammer, thereby providing a solid guarantee for the stable operation of various fluid conveying systems.

[0015] 2. Improve overall performance and stability

[0016] The buffer, arc-shaped supporting block, sealing seat and sealing gasket and cross-shaped reinforcing rib cooperate to improve the overall performance of the check valve. The buffer can effectively reduce the impact when the valve plate is opened and closed, significantly reduce vibration, and make the check valve work more stably. The arc-shaped supporting block ensures the stability of the rotating rod, thereby ensuring the accurate rotation of the valve plate and prolonging the service life of the components. The sealing seat and the sealing gasket cooperate closely to effectively prevent backflow of fluid and ensure the core function of the check valve. The cross-shaped reinforcing ribs enhance the strength of the valve cover, prevent deformation, improve the overall reliability and durability of the check valve, and effectively reduce the operating cost. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the utility model and form part of the present application. The schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an improper limitation on the utility model. In the drawings:

[0018] Fig. 1 is the sectional view of the whole of the utility model;

[0019] Fig. 2 is the plan view of the utility model;

[0020] Fig. 3 is the sectional view of the buffer of the utility model;

[0021] Legend:

[0022] 1, valve body; 2, inlet; 3, outlet; 4, valve cover; 5, rotating rod; 6, valve plate; 7, assembly groove; 8, piston; 9, spring; 10, cavity; 11, permanent magnet; 12, iron ball; 13, arc-shaped supporting block; 14, sealing seat; 15, sealing gasket; 16, buffer; 17, cross-shaped reinforcing rib; 18, connecting flange; 19, shell; 20, buffer spring; 21, buffer column. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0024] The specific embodiments are given below.

[0025] Please refer to Figs. 1-3The utility model discloses a swing -type check valve, including valve body 1, the valve body 1 includes inlet 2 and outlet 3, one end of inlet 2 and outlet 3 is fixedly arranged with the connecting flange 18, the valve body 1 top fixed assembly has the valve cover 4, the valve body 1 is rotationally arranged with the valve plate 6 through the swivel rod 5, the one side of valve plate 6 is close to the outlet 3 and is seted up with the assembly groove 7, the assembly groove 7 is movably arranged with the piston 8, the spring 9 is terminated between the piston 8 and the assembly groove 7 inner wall, the inside of piston 8 is provided with the cavity 10, the one side of cavity 10 inner wall is fixedly arranged with permanent magnet 11, the cavity 10 is provided with a plurality of iron ball 12, when working, under normal conditions, fluid flows from inlet 2, under the pressure effect of the forward fluid, the valve plate 6 rotates counterclockwise around the swivel rod 5, makes the valve open, and fluid flows to the outlet 3 smoothly, when the water hammer phenomenon appears, the fluid of high speed backflow directly impacts the valve plate 6, because the piston 8 in the assembly groove 7 of the one side of valve plate 6 close to the outlet 3 is directly exposed in the backflow fluid, it is impacted first, the piston 8 moves along the assembly groove 7 to the direction close to the spring 9 under the impact force, the spring 9 is compressed, and the kinetic energy of fluid is converted into the elastic potential energy of spring, realizes the preliminary energy buffering, at the same time, the iron ball 12 in the cavity 10 of piston 8, because the sudden acceleration motion of piston 8 and the impact of backflow fluid, obtains greater initial speed, produces stronger inertia force, the inertia force makes the iron ball 12 overcome the magnetic force restraint of permanent magnet 11, and flies away from permanent magnet 11, in this process, the iron ball 12 overcomes the magnetic force and does work, and part kinetic energy is converted into magnetic potential energy, simultaneously, the iron ball 12 collides in the cavity 10 and collides with the cavity wall, and energy dissipation is generated, further reduces the energy of backflow fluid, when backflow impact weakens, the magnetic force of permanent magnet 11 reoccupies the dominator, and the iron ball 12 is adsorbed back to the original position, effectively alleviates the water hammer effect, the swing -type check valve of the utility model is stronger in impact, and the spring compression amount is greater, and the iron ball flies away faster, and the distance is farther, and the energy absorption effect is more remarkable, greatly enhances the resistance ability of check valve to water hammer phenomenon, improves the operation stability and safety of pipeline system under complex working conditions.

[0026] Further, the arc-shaped supporting blocks 13 are fixedly arranged on the inner wall of the valve body 1 below the two ends of the rotating rod 5; during the rotation of the valve plate 6, the rotating rod 5 bears the gravity of the valve plate 6 and the force of the fluid acting on the valve plate 6, which will cause the downward pressure and torque of the rotating rod 5; the arc-shaped surface of the arc-shaped supporting blocks 13 is matched with the outer contour of the rotating rod 5, and the arc-shaped supporting blocks 13 provide the rotating rod 5 with continuous supporting force when the valve plate 6 is opened, so as to ensure the position stability of the rotating rod 5 in the vertical direction, avoid the sinking or deviation of the rotating rod 5 due to the gravity and the fluid impact, and ensure that the valve plate 6 can be smoothly opened according to the predetermined rotation track; during the closing of the valve plate 6, the arc-shaped supporting blocks 13 also play a role in stabilizing the position of the rotating rod 5, so that the valve plate 6 can be accurately attached to the sealing seat 14 to achieve good sealing effect; the design of the arc-shaped supporting blocks 13 significantly improves the stability and reliability of the rotation of the valve plate 6, reduces the wear and jamming of the rotating rod 5 due to the deviation of the position, and prolongs the service life of the rotating rod 5 and the valve plate 6.

[0027] Further, the sealing seat 14 is fixedly arranged in the valve body 1 at the inlet 2, and the valve plate 6 is fixedly provided with a sealing gasket 15 matched with the sealing seat 14; during the work, when the fluid stops flowing forward or appears backflow, the valve plate 6 rotates clockwise around the rotating rod 5 to close under the joint action of the gravity and the backflow fluid pressure; as the valve plate 6 is closed, the sealing gasket 15 gradually approaches the sealing seat 14 and finally tightly attaches to the sealing seat 14; the sealing gasket 15 is made of rubber, polytetrafluoroethylene or other materials with good elasticity and sealing performance, which can form a tight sealing contact between the valve plate 6 and the sealing seat 14, fill the small gap between them, and effectively prevent the backflow of the fluid.

[0028] Further, the buffer 16 is arranged on the inner wall of the valve body 1 at the end of the opening stroke of the valve plate 6, and the buffer 16 includes a shell 19, and a buffer column 21 is movably arranged in the shell 19 by a buffer spring 20; during the work, when the valve plate 6 is opened under the action of the forward fluid pressure, the valve plate 6 gradually rotates to the position of the buffer 16; when the valve plate 6 is opened to the end of the stroke, the valve plate 6 contacts and pushes the buffer column 21; under the pushing force of the valve plate 6, the buffer column 21 moves to the inside of the shell 19 by overcoming the elastic force of the buffer spring 20, and the buffer spring 20 is compressed; in this process, the buffer spring 20 converts the kinetic energy of the valve plate 6 into the elastic potential energy of itself, so as to slow down the opening speed of the valve plate 6 and reduce the impact force when the valve plate 6 is opened to the maximum position; when the valve plate 6 starts to close, the elastic potential energy stored in the buffer spring 20 is released to push the buffer column 21 to move reversely, and apply an auxiliary pushing force to the valve plate 6, so that the valve plate 6 can start to close more stably, and the impact and vibration in the closing process are reduced.

[0029] Further, the top end of the valve cover 4 is fixedly provided with a cross-shaped reinforcing rib 17; in operation, the valve cover 4 serves as a key component for closing the top of the valve body 1, and bears the pressure from the fluid inside the valve body 1 during the operation of the check valve; the cross-shaped reinforcing rib 17 is firmly connected with the valve cover 4 through integral molding, thereby increasing the structural strength and rigidity of the valve cover 4; when the fluid pressure acts on the valve cover 4, the cross-shaped reinforcing rib 17 disperses the pressure in multiple directions, changes the stress distribution of the valve cover 4, and enables the valve cover 4 to better bear the pressure without deformation, thereby improving the overall reliability and service life of the check valve and reducing the operation cost.

[0030] In the description of the present specification, the description referring to the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0031] The basic principle, main features and advantages of the present application have been shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only illustrative of the principle of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A swing check valve characterized by: The utility model provides a valve, including valve body (1), valve body (1) includes inlet (2) and outlet (3), valve body (1) top fixedly equipped with valve cover (4), the inside rotation of valve body (1) is provided with valve plate (6) through rotating rod (5), the one side of valve plate (6) is close to the side of being equipped with assembly groove (7) of outlet (3) and is set up, the piston (8) is movably arranged in assembly groove (7), and the spring (9) between piston (8) and assembly groove (7) inner wall is terminated, the inside of piston (8) is provided with cavity (10), the one side of cavity (10) inner wall is fixedly provided with permanent magnet (11), a plurality of iron ball (12) are provided in cavity (10).

2. A swing check valve according to claim 1, wherein: The arc-shaped supporting block (13) is fixedly arranged on the inner wall of the valve body (1) below the two ends of the rotating rod (5).

3. A swing check valve according to claim 1, wherein: The sealing seat (14) is fixedly arranged on the inner wall of the valve body (1) at the inlet (2), and the sealing gasket (15) is fixedly arranged on one side of the valve plate (6) and matched with the sealing seat (14).

4. A swing check valve according to claim 1, wherein: The buffer (16) is arranged on the inner wall of the valve body (1) at the end of the stroke of the opening of the valve plate (6).

5. A swing check valve according to claim 1, wherein: The cross-shaped reinforcing rib (17) is fixedly arranged on the top end of the valve cover (4).

6. A swing check valve according to claim 1, wherein: The connecting flange (18) is fixedly arranged on one end of the inlet (2) and the outlet (3).

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