Low-flow-resistance noise reduction check valve sealing structure

Abstract

The utility model provides a low flow resistance noise reduction check valve sealing structure which is characterized in that a fixed shaft is arranged in a valve body, the valve body comprises a valve clack arranged on the fixed shaft in a sliding mode, an elastic piece is arranged on the outer side of the fixed shaft, the end portion of the elastic piece and the valve clack are fixedly arranged together, and a sealing assembly is arranged on the outer side of the valve clack. The sealing assembly comprises a sealing sleeve which is arranged on the outer side of the valve clack and abuts against the inner side wall of the valve body, an adjusting pressing disc is arranged on the lower portion of the valve clack, and a gasket is arranged in a cavity among the adjusting pressing disc, the valve clack and the sealing sleeve. According to the check valve, the sealing performance between the valve clack and the inner side wall of the valve body can be greatly enhanced through matching of the elastic assembly and the sealing assembly, the service life of the check valve is greatly prolonged, and the problem that a traditional check valve performs sealing operation only by arranging a sealing gasket on the outer side of the valve clack is solved; and along with the prolonging of the working time of the check valve, the sealing effect of the valve clack is reduced after the sealing gasket is abraded, and the service life of the check valve is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of valve sealing structures, in particular to a low flow resistance and silencer check valve sealing structure. Background Art

[0002] Silent check valves are compact, lightweight, and simple in structure. They automatically open and close the disc based on the flow pressure of the medium and the force of a compression spring. They are designed to prevent backflow of the medium and the resulting water hammer and noise. They are not suitable for use with media containing solid particles or with high viscosity.

[0003] The traditional sealing structure of the check valve is to seal only by setting a sealing gasket on the outside of the valve disc. However, as the working time of the check valve increases, the sealing gasket is very easy to wear out. When it is worn, the sealing effect of the valve disc will be reduced, and the service life of the check valve will be shortened. Utility Model Content

[0004] In view of this, the utility model provides a low flow resistance and silencer check valve sealing structure, which can greatly enhance the sealing performance between the valve disc and the inner wall of the valve body by cooperating with the elastic component and the sealing component, thereby increasing the service life of the check valve and solving the problem that the sealing structure of the traditional check valve only performs the sealing operation by arranging a sealing gasket on the outer side of the valve disc, but as the working time of the check valve increases, the sealing gasket is very likely to be worn away. When it is worn, the sealing effect of the valve disc is reduced, thereby reducing the service life of the check valve.

[0005] In order to solve the above technical problems, the present invention provides a low flow resistance and silencer check valve sealing structure, wherein a fixed shaft is provided inside the valve body, including a valve disc slidably arranged on the fixed shaft, an elastic member is provided on the outside of the fixed shaft, the end of the elastic member is fixedly arranged with the valve disc, a sealing assembly is provided on the outside of the valve disc, the sealing assembly includes a sealing sleeve provided on the outside of the valve disc and in conflict with the inner side wall of the valve body, an adjusting pressure plate is provided at the lower part of the valve disc, a gasket is provided in the cavity between the adjusting pressure plate, the valve disc and the sealing sleeve, the outer side of the gasket is in conflict with the inner side of the sealing sleeve, the present invention can be realized by elastic means. The combination of the elastic component and the sealing component greatly enhances the sealing performance between the valve disc and the inner wall of the valve body. After the sealing sleeve is slightly worn, the sealing sleeve can be ensured to always be in contact with the inner wall of the valve body by adjusting the pressure plate and the gasket, so that the sealing effect is better and the service life of the check valve is greatly increased. It solves the problem that the sealing structure of the traditional check valve only performs sealing operations by arranging a sealing gasket on the outside of the valve disc, but as the working time of the check valve increases, the sealing gasket is very easy to be ground. When it is worn, it will reduce the sealing effect of the valve disc and shorten the service life of the check valve.

[0006] An adjusting bolt for adjusting the height of the valve disc is threadedly connected to the adjusting pressure plate.

[0007] A guide plate is provided in the valve body and on the upper part of the fixed shaft, and a sealing ring is provided on the outer side of the guide plate.

[0008] The elastic member is a compression spring.

[0009] The compression spring is sleeved on the outside of the fixed shaft, with one end fixed to the guide plate and the other end fixed to the upper part of the valve disc.

[0010] One end of the fixed shaft is connected to the guide plate through a shaft sleeve, and the valve disc is slidably arranged at the other end of the fixed shaft. An annular mounting groove is provided on the valve disc, and an O-ring is arranged in the annular mounting groove. The O-ring is sleeved on the outside of the fixed shaft.

[0011] A sealing ring is arranged inside the shaft sleeve and outside the fixed shaft.

[0012] In summary, compared with the prior art, this application has at least one of the following beneficial technical effects:

[0013] 1. The utility model can greatly enhance the sealing performance between the valve disc and the inner wall of the valve body by combining the elastic component with the sealing component. After the sealing sleeve is slightly worn, the sealing sleeve can be ensured to always be in contact with the inner wall of the valve body by adjusting the pressure plate and the gasket, thereby achieving better sealing effect, greatly increasing the service life of the check valve and the service life of the low flow resistance silent check valve.

[0014] 2. The utility model can adjust the height of the valve disc by turning the adjusting bolt, which is convenient for quickly and easily adjusting the pre-compression force of the elastic member. Moreover, after slight wear occurs on the outer wall of the sealing sleeve, the pressing force of the pressure plate on the gasket can be adjusted by tightening the adjusting bolt, so that the sealing sleeve is deformed until it is always tightly pressed against the inner cavity of the valve body, thereby achieving good sealing performance and enhancing the service life of the sealing sleeve.

[0015] 3. When the medium flows from the water inlet, the pressure of the medium itself pushes the compression spring on the valve disc to open the valve; when the medium flows back from the water outlet, the valve disc is pushed by the thrust of the compression spring and the pressure of the backflow of the medium itself (when the valve is installed vertically, the valve disc is also affected by its own gravity), pushing the valve disc to move and making the valve disc sealing surface tightly combined with the valve seat sealing surface, so as to achieve the purpose of closing the valve and preventing the backflow of the medium.

[0016] 4. The utility model can push the valve disc to move axially along the fixed axis by relying on the impact force of the compression spring after being impacted by the water flow and the restoring elastic force of the compression spring after the water pressure decreases or the water supply is stopped, so as to ensure that there is no friction between the sealing surfaces when the valve is opened and closed, greatly reducing the water hammer effect and thus reducing noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of the sealing structure of the low flow resistance silencer check valve of the utility model;

[0018] Figure 2 For this utility model Figure 1 Enlarged view of point A in the middle.

[0019] Explanation of the accompanying drawings: 100, valve body; 200, fixed shaft; 300, valve disc; 400, elastic member; 500, sealing assembly; 501, sealing sleeve; 502, adjusting pressure plate; 503, gasket; 600, guide plate; 700, sealing ring; 800, shaft sleeve; 900, O-ring. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiment of the present invention clearer, the following will be combined with the appended drawings of the embodiment of the present invention. Figure 1-2 , clearly and completely describing the technical solutions of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field fall within the scope of protection of the present invention.

[0021] like Figure 1-2As shown: This embodiment provides a low flow resistance silencer check valve sealing structure, including a valve disc 300 slidably arranged on a fixed shaft 200. The material of the valve disc 300 is any one of ductile iron, carbon steel, stainless steel or bronze. The cross section of the valve disc 300 is an arch bridge structure. The purpose of this is to ensure that the water flow resistance is minimized in the open state and can quickly and tightly fit the valve seat when closed to achieve a good sealing effect, thereby reducing the water hammer effect and reducing the water flow resistance. An elastic member 400 is provided on the outside of the fixed shaft 200, and the end of the elastic member 400 is fixed to the valve disc 300. Through the deformation of the elastic member 400 itself and the effect of restoring elastic force, the valve flap 300 can quickly respond to changes in the direction of water flow. When the water flow is reversed, it closes quickly to effectively prevent the medium from flowing back. At the same time, the spring of the elastic member 400 also helps to reduce the impact during the closing process and reduce noise. A sealing assembly 500 is provided on the outside of the valve flap 300. The sealing assembly 500 includes a sealing sleeve 501 provided on the outside of the valve flap 300 and in contact with the inner side wall of the valve body 100. An adjusting pressure plate 502 is provided at the lower part of the valve flap 300. The adjusting pressure plate 502, the valve flap 300 and the sealing sleeve 50 1 is provided with a gasket 503, the outer side of the gasket 503 is in conflict with the inner side of the sealing sleeve 501, the sealing sleeve 501 and the gasket 503 are usually made of wear-resistant and corrosion-resistant materials, such as rubber or stainless steel surfacing, which can provide good sealing performance and absorb the impact energy when the valve is partially closed, thereby achieving a silent effect. The rubber sealing sleeve 501 can adapt to the slight unevenness of the valve seat surface, forming a good sealing contact surface, which greatly enhances the sealing noise reduction effect. The utility model can greatly enhance the sealing and noise reduction effect of the valve disc 300 and the valve body 10 by cooperating with the sealing component 500 through the elastic component. 0. After the sealing sleeve 501 is slightly worn, the sealing sleeve 501 can be ensured to always be in contact with the inner wall of the valve body 100 by adjusting the pressure plate 502 and the gasket 503, so that the sealing effect is better, which greatly increases the service life of the check valve and solves the problem that the sealing structure of the traditional check valve only performs sealing operation by arranging a sealing gasket on the outside of the valve disc 300, but as the working time of the check valve increases, the sealing gasket is very easy to be ground. When it is worn, it will reduce the sealing effect of the valve disc 300 and shorten the service life of the check valve.

[0022] According to one embodiment of the present invention, Figure 1-2As shown, the adjusting pressure plate 502 is threadedly connected with an adjusting bolt for adjusting the height of the valve flap 300. The utility model can push the valve flap 300 to adjust its height by turning the adjusting bolt, so as to facilitate the convenient and rapid adjustment of the pre-compression force of the elastic member 400. Moreover, after slight wear occurs on the outer side wall of the sealing sleeve 501, the pressing force of the adjusting pressure plate 502 on the gasket 503 can be adjusted by tightening the adjusting bolt, so that the sealing sleeve 501 is deformed to push the sealing sleeve 501 to always tightly contact the inner cavity of the valve body 100, thereby achieving good sealing performance and enhancing the service life of the sealing sleeve 501.

[0023] According to another embodiment of the present invention, as shown in FIG. Figure 2 As shown, a guide plate 600 is provided inside the valve body 100 and on the upper part of the fixed shaft 200, and a sealing ring 700 is provided on the outer side of the guide plate 600. The utility model can install and fix the fixed shaft 200 through the guide plate 600, and the sealing ring 700 enhances the sealing performance of the joint between the guide plate 600 and the valve body 100.

[0024] According to another embodiment of the present invention, Figure 1 As shown, the elastic member 400 is a compression spring. When the medium flows from the water inlet, the pressure of the medium itself pushes the compression spring on the valve flap 300 to further compress, so that the valve is opened; when the medium flows back from the water outlet, the valve flap 300 is pushed by the thrust of the compression spring and the pressure of the backflow of the medium itself (when the valve is installed vertically, the valve flap 300 is also affected by its own gravity), and the sealing surface of the valve flap 300 is tightly combined with the sealing surface of the valve seat, so as to achieve the purpose of closing the valve and preventing the backflow of the medium.

[0025] The compression spring is sleeved on the outside of the fixed shaft 200, and one end is fixed to the guide plate 600, and the other end is fixed to the upper part of the valve disc 300. The utility model can push the valve disc 300 to move axially along the fixed shaft 200 by relying on the impact force of the compression spring after being impacted by the water flow and the restoring elastic force of the compression spring after being compressed after the water pressure is reduced or the water supply is stopped, thereby ensuring that there is no friction between the sealing surfaces when the valve is opened and closed, greatly reducing the water hammer effect, and thus reducing noise.

[0026] One end of the fixed shaft 200 is connected to the guide plate 600 through a shaft sleeve 800, and the valve flap 300 is slidably set at the other end of the fixed shaft 200. An annular mounting groove is provided on the valve flap 300, and an O-ring 900 is provided in the annular mounting groove. The O-ring 900 is sleeved on the outer side of the fixed shaft 200. The O-ring is made of nitrile rubber or EPDM. The utility model can achieve good sealing of the joint between the fixed shaft 200 and the valve flap 300 through the O-ring 900 when the valve flap 300 is pushed to slide along the fixed shaft 200 under the impact of water flow and the self-restoring elastic force of the compression spring after being compressed, making the operation more convenient.

[0027] A sealing ring is provided inside the shaft sleeve 800 and outside the fixed shaft 200 . The present invention can achieve good sealing of the joint between the shaft sleeve 800 and the fixed shaft 200 through the sealing ring.

[0028] The use method of this utility model:

[0029] First of all, it should be made clear that the sealing structure involved in the present invention is mainly used for sealing between the valve disc 300 and the inner wall of the valve body 100 and the connection part between the fixed shaft 200 and the valve disc 300 during the operation of the low flow resistance and silencer check valve. The present invention takes the working process of the sealing mechanism of the low flow resistance and silencer check valve as an example to explain its usage in detail. When the low flow resistance and silencer check valve is working normally, when the medium flows from the water inlet direction, the pressure of the medium itself pushes the compression spring on the valve disc 300 to open the valve; when the medium flows back from the water outlet direction, the valve disc 300 is pushed by the thrust of the compression spring and the pressure of the medium itself (when the valve is installed vertically, the valve disc 300 is also affected by its own gravity) to move the valve disc 300, and the sealing surface of the valve disc 300 is tightly combined with the sealing surface of the valve seat, so as to achieve the purpose of closing the valve and preventing the medium from flowing back. In this process, especially when the medium flows back from the water outlet direction or after the water inlet operation is completed, the sealing component 500 is sealed. The sealing sleeve 501 seals against the inner wall of the valve body 100 to achieve a good sealing effect on the valve body 100 and prevent medium backflow. When the sealing effect of the sealing sleeve 501 deteriorates, the operator can adjust the height of the valve disc 300 by turning the adjusting bolt, thereby facilitating convenient and quick adjustment of the pre-compression force of the elastic member 400. Moreover, when the outer wall of the sealing sleeve 501 is slightly worn, the pressing force of the adjusting pressure plate 502 on the gasket 503 can be adjusted by tightening the adjusting bolt to deform the sealing sleeve 501 until it is always tightly pressed against the inner cavity of the valve body 100, thereby achieving good sealing performance and extending the service life of the sealing sleeve 501. This solves the problem that the sealing structure of the traditional check valve only uses a sealing gasket on the outer side of the valve disc 300 to achieve sealing. However, as the check valve operates for a longer time, the sealing gasket is easily worn. When the sealing gasket is worn, the sealing effect of the valve disc 300 is reduced, shortening the service life of the check valve.

[0030] Furthermore, it should be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0031] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles described in the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A low flow resistance silencer check valve sealing structure, wherein a fixed shaft (200) is provided inside the valve body (100), characterized in that: The invention comprises a valve flap (300) slidably arranged on a fixed shaft (200), an elastic member (400) is arranged on the outer side of the fixed shaft (200), and the end of the elastic member (400) is fixed to the valve flap (300), a sealing assembly (500) is arranged on the outer side of the valve flap (300), and the sealing assembly (500) comprises a sealing sleeve (501) arranged on the outer side of the valve flap (300) and in contact with the inner side wall of the valve body (100), an adjusting pressure plate (502) is arranged at the lower part of the valve flap (300), a gasket (503) is arranged in the cavity between the adjusting pressure plate (502), the valve flap (300) and the sealing sleeve (501), and the outer side of the gasket (503) is in contact with the inner side of the sealing sleeve (501).

2. The low flow resistance and silencer check valve sealing structure according to claim 1, characterized in that: An adjusting bolt for adjusting the height of the valve flap (300) is threadedly connected to the adjusting pressure plate (502).

3. The low flow resistance and silencer check valve sealing structure according to claim 2, characterized in that: A guide plate (600) is provided in the valve body (100) and located on the upper portion of the fixed shaft (200), and a sealing ring (700) is provided on the outer side of the guide plate (600).

4. The low flow resistance and silencer check valve sealing structure according to claim 3, characterized in that: The elastic member (400) is a compression spring.

5. The low flow resistance and silencer check valve sealing structure according to claim 4, characterized in that: The compression spring is sleeved on the outside of the fixed shaft (200), with one end fixed to the guide plate (600) and the other end fixed to the upper part of the valve flap (300).

6. The low flow resistance and silencer check valve sealing structure according to claim 5, characterized in that: One end of the fixed shaft (200) is connected to the guide plate (600) via a shaft sleeve (800), and the valve flap (300) is slidably arranged on the other end of the fixed shaft (200). The valve flap (300) is provided with an annular mounting groove, and an O-ring (900) is arranged in the annular mounting groove. The O-ring (900) is sleeved on the outer side of the fixed shaft (200).

7. The low flow resistance and silencer check valve sealing structure according to claim 6, characterized in that: A sealing ring is provided inside the shaft sleeve (800) and outside the fixed shaft (200).

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