Swing check valve

Abstract

The utility model provides a swing check valve which comprises a valve body, a valve cover is installed at the upper end of the valve body, the valve cover is in flange connection with the valve body through a plurality of hexagon bolts and a plurality of nuts, and a buffering mechanism is arranged on one side of the bottom of the valve cover. The buffering mechanism comprises a threaded column fixedly connected to the bottom of the valve deck and a telescopic sleeve in threaded connection to the threaded column, a telescopic hole is formed in the end, away from the threaded column, of the telescopic sleeve, a telescopic cavity is formed in the telescopic sleeve, and a limiting column is arranged in the through hole in a telescopic mode. By arranging the buffering mechanism, when fluid opens the valve clack through the flow velocity, the valve clack is pushed by the rocker arm to act to drive the valve clack to abut against or lose abutting against the valve seat, and when the rocker arm abuts against the limiting column, impact force between the rocker arm and the limiting column can be relieved through buffering of the spring, the buffering pad and the damping oil, and therefore the valve clack is prevented from being damaged. The rocker arm is prevented from being damaged due to excessive impact, and the service life loss of the rocker arm is reduced.

Description

Technical Field

[0001] This utility model relates to a swing check valve, belonging to the field of valve technology. Background Technology

[0002] A valve is a device used to control the flow of fluids (such as gases or liquids), and it is widely used in various systems in industry, construction, and daily life. The basic function of a valve is to open and close fluid passages in pipelines, or to regulate the flow rate and pressure of fluids.

[0003] In the prior art, Chinese utility model patent CN221463011U discloses a "swing check valve", which includes a valve body with a valve cover installed at the upper end. A rocker arm can drive a valve disc installed at the lower end to open or close. This device has a limit post installed at the lower end of the valve cover. When fluid flows through and opens the valve disc, the valve disc is pushed, and the rocker arm connected to it drives the valve disc to open or close. In order to control the opening limit of the valve disc and prevent it from hitting the inner wall of the valve body, the device is equipped with a limit post at the lower end of the valve cover. The function of this limit post is to limit the movement range of the valve disc by contacting it with the rocker arm when the valve disc reaches the maximum opening height. This avoids the valve disc from causing impact damage to the valve body. Over time, the rocker arm may wear out due to repeated impacts with the limit post. When the rocker arm wears out, only the rocker arm needs to be replaced, without replacing the entire valve body, thus reducing maintenance costs.

[0004] While the aforementioned patents may include a limiting post to prevent impact damage between the valve disc and the valve body, the impact on the rocker arm can cause damage, shortening its lifespan. Therefore, this invention proposes a swing check valve. Utility Model Content

[0005] Based on the above background, the purpose of this utility model is to provide a swing check valve to solve the problems in the background art.

[0006] This utility model provides the following technical solution:

[0007] A swing check valve includes a valve body with a valve cover mounted on its upper end. The valve cover is connected to the valve body via a flange using a plurality of hexagonal bolts and a plurality of nuts. A buffer mechanism is provided on one side of the bottom of the valve cover. The buffer mechanism includes a threaded post fixedly connected to the bottom of the valve cover and a telescopic sleeve threaded onto the threaded post. The telescopic sleeve has a telescopic hole at its end away from the threaded post. A telescopic cavity is provided inside the telescopic hole. A limit post is telescopically installed inside the telescopic cavity. A piston is provided at one end of the limit post located inside the telescopic cavity. A set of sealing rings is fitted on the outer cylindrical surface of the piston. A spring is provided between the piston and the threaded post. The spring is located inside the telescopic cavity, which is also filled with damping oil.

[0008] Preferably, an annular sealing gasket is provided at the connection between the valve cover and the valve body.

[0009] Preferably, the valve body is provided with a rocker arm inside, and a valve disc is installed at the lower end of the rocker arm.

[0010] Preferably, a groove is provided on the inner wall of the valve body near the rocker arm end, and a valve seat is provided in the groove.

[0011] Preferably, the valve disc can abut against the valve seat under the influence of the counterflowing fluid and its own gravity, thereby preventing fluid backflow.

[0012] Preferably, a buffer pad is provided on the end of the limiting post away from the piston.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] This utility model discloses a swing check valve. By setting a buffer mechanism, when the fluid flows through and opens the valve disc, the valve disc is pushed by the rocker arm to move, causing the valve disc to either come into contact with or lose contact with the valve seat. When the rocker arm comes into contact with the limit post, the impact force between the rocker arm and the limit post can be reduced by the buffer of the spring, buffer pad and damping oil, avoiding damage to the rocker arm due to excessive impact and reducing the service life of the rocker arm. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0017] Figure 2 This is a cross-sectional view of the present invention;

[0018] Figure 3 This is a utility model Figure 2 Enlarged schematic diagram of the structure of section A in the middle.

[0019] In the diagram: 1. Valve body; 2. Valve cover; 3. Hex bolt; 4. Nut; 5. Threaded post; 6. Telescopic sleeve; 7. Telescopic hole; 8. Limiting post; 9. Piston; 10. Sealing ring; 11. Spring; 12. Damping oil; 13. Annular sealing gasket; 14. Rocker arm; 15. Valve disc; 16. Groove; 17. Valve seat; 18. Buffer pad. Detailed Implementation

[0020] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. It should be understood that the implementation of this utility model is not limited to the following embodiments, and any modifications and / or alterations made to this utility model will fall within the protection scope of this utility model.

[0021] In this invention, unless otherwise specified, all parts and percentages are by weight, and the equipment and raw materials used are commercially available or commonly used in the field. Unless otherwise specified, the methods in the following embodiments are conventional methods in the field. Unless otherwise specified, the components or equipment in the following embodiments are general standard parts or components known to those skilled in the art, and their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0022] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following detailed description, many specific details are set forth to facilitate explanation and provide a comprehensive understanding of the embodiments of the present invention. However, one or more embodiments may be practiced by those skilled in the art without these specific details.

[0023] like Figures 1-3As shown, a swing check valve includes a valve body 1. A valve cover 2 is installed on the upper end of the valve body 1. The valve cover 2 is connected to the valve body 1 via a flange through a plurality of hexagonal bolts 3 and a plurality of nuts 4. A buffer mechanism is provided on one side of the bottom of the valve cover 2. The buffer mechanism includes a threaded post 5 fixedly connected to the bottom of the valve cover 2 and a telescopic sleeve 6 threadedly connected to the threaded post 5. A telescopic hole 7 is provided at the end of the telescopic sleeve 6 away from the threaded post 5. A telescopic cavity is provided inside the telescopic hole. A limiting post 8 is telescopically provided in the through hole. A piston 9 is provided at one end of the limiting post 8 located inside the telescopic cavity. A set of sealing rings 10 is fitted on the outer cylindrical surface of the piston 9. A spring 11 is provided between the piston 9 and the threaded post 5. The spring 11 is located inside the telescopic cavity. The telescopic cavity is also filled with damping oil 12.

[0024] In the above technical solution, by setting a buffer mechanism, when the fluid opens the valve disc 15 through the flow rate, the valve disc 15 is pushed by the rocker arm 14 to move and cause the valve disc 15 to abut against or lose contact with the valve seat 17. When the rocker arm 14 abuts against the limit post 8, the impact force between the rocker arm 14 and the limit post 8 can be reduced by the buffer of the spring 11, the buffer pad 18 and the damping oil 12, so as to avoid the rocker arm 14 being damaged by excessive impact and reduce the service life wear of the rocker arm 14.

[0025] In this utility model, an annular sealing gasket 13 is provided at the connection between the valve cover 2 and the valve body 1.

[0026] In this utility model, a rocker arm 14 is provided inside the valve body 1, and a valve disc 15 is installed at the lower end of the rocker arm 14.

[0027] In this utility model, a groove 16 is provided on the inner wall of the valve body 1 near the rocker arm 14, and a valve seat 17 is provided in the groove 16.

[0028] In this invention, the valve disc 15 can abut against the valve seat 17 under the influence of the counterflowing fluid and its own gravity, thereby preventing fluid backflow.

[0029] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A swing check valve characterized by: Including the valve body (1), the valve cover (2) is installed on the upper end of the valve body (1), the valve cover (2) is connected with the valve body (1) through the flange of several hexagonal bolts (3) and several nuts (4), one side of the bottom of the valve cover (2) is provided with a buffer mechanism, the buffer mechanism includes a threaded column (5) fixedly connected to the bottom of the valve cover (2) and a telescopic sleeve (6) threadedly connected to the threaded column (5), a telescopic hole (7) is formed in the end of the telescopic sleeve (6) away from the threaded column (5), the telescopic sleeve (6) is provided with a telescopic cavity, a limiting column (8) is telescopically arranged in the through hole, the limiting column (8) is provided with a piston (9) at one end in the telescopic cavity, a group of sealing rings (10) are sleeved on the outer cylindrical surface of the piston (9), a spring (11) is arranged between the piston (9) and the threaded column (5), the spring (11) is located in the telescopic cavity, and the telescopic cavity is also filled with damping oil (12).

2. A swing check valve according to claim 1, wherein: The connecting part of the valve cover (2) and the valve body (1) is provided with an annular sealing gasket (13).

3. A swing check valve according to claim 1, wherein: The valve body (1) is provided with a rocker arm (14) inside, and the rocker arm (14) is installed with a valve clack (15) at the lower end.

4. A swing check valve according to claim 3, wherein: The inner wall of the valve body (1) near one end of the rocker arm (14) is provided with a recess (16), and the recess (16) is provided with a valve seat (17).

5. A swing check valve according to claim 4, wherein: The valve clack (15) can be abutted with the valve seat (17) under the driving of the reverse fluid and its own gravity, so as to prevent the backflow of the fluid.

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