CN217736371U

CN217736371U - Swing check valve

Info

Publication number: CN217736371U
Application number: CN202221932726.5U
Authority: CN
Inventors: 柯伟芳; 叶晓东; 黄建林; 徐嘉驰
Original assignee: Sungo Valves Group Co ltd
Current assignee: Sungo Valves Group Co ltd
Priority date: 2022-07-22
Filing date: 2022-07-22
Publication date: 2022-11-04
Anticipated expiration: 2032-07-22

Abstract

The utility model discloses a swing check valve, which comprises a valve body, a valve seat and a valve clack, wherein the valve seat and the valve clack are arranged in the valve body; the valve clack comprises a valve clack main body and a balance body, one end face of the valve clack main body is matched with the valve seat, and the other end face of the valve clack main body is provided with a connecting part for connecting the balance body; the connecting part is arranged on the valve body in a rotating mode through the rotating shaft, the rotating shaft is located between the valve clack main body and the balance body, the rotating radius R of the opening and closing of the valve clack main body is effectively reduced, the opening angle az of the valve clack main body is increased, the valve clack is convenient to open and close, and the balance body is additionally arranged on the valve clack, so that the sealing performance and the operating characteristic of the valve are better.

Description

Swing check valve

Technical Field

The utility model relates to a valve field, more specifically says that it relates to a swing check valve.

Background

The check valve is arranged on the process pipeline to prevent the process medium from flowing backwards, and plays a role of safety protection, such as being arranged at the outlet of a water pump, the discharge port of a container and the like. Common check valve configurations include swing, lift and axial flow. The swing check valve is generally installed on a horizontal pipeline, and when a medium flows in a forward direction, a closing member (valve clack) of the check valve is pushed by the medium to rotate around a valve shaft so as to open the valve. Once the medium reverse flow occurs, the check valve closing member rapidly closes to shut off the medium flow under the thrust of the reverse medium flow.

The operation condition of the industrial pipeline is changed frequently, the medium flow is large and small, the working pressure is high or low, and the check valve cannot work stably. Under the working condition of small flow, the medium thrust cannot completely open the valve clack in place, and the valve clack frequently acts under a small opening degree, so that valve vibration is caused, even system pipeline resonance is caused, abnormal noise is generated, and a valve sealing pair is quickly damaged by impact; when the normal flow operating mode, the limit boss or limit block is only established to the full open position of conventional swing check valve closure member, along with medium disturbance valve clack, rocker luffing motion, hardly realizes steady operation.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a swing-type non return.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a swing check valve comprises a valve body, a valve seat and a valve clack, wherein the valve seat and the valve clack are installed in the valve body; the valve clack comprises a valve clack main body and a balance body, one end face of the valve clack main body is matched with the valve seat, and the other end face of the valve clack main body is provided with a connecting part for connecting the balance body; the connecting part is rotatably arranged on the valve body through a rotating shaft, and the rotating shaft is positioned between the valve clack main body and the balance body.

The utility model discloses further set up: one end of the connecting part is connected with the upper end of the valve clack main body, and the other end of the connecting part is connected with the lower end of the balance body.

The utility model discloses further set up: the rotating shaft is arranged opposite to the valve seat and is positioned above the central line of the flow passage.

The utility model discloses further set up: the sealing surface of the valve seat matched with the valve clack main body is a spherical surface sealing surface, and the sealing surface of the valve clack main body matched with the valve seat is a conical surface sealing surface.

The utility model discloses further set up: the connecting part is provided with a rotating hole matched with the rotating shaft.

The utility model discloses beneficial effect: the utility model discloses traditional swing check valve clack structure has been changed, the connecting portion of valve clack passes through the rotation axis rotation and sets up on the valve body, makes the valve clack main part can match with the disk seat around the rotation axis rotation, thereby realizes opening or closing, replaces the traditional mounting means that adopts the valve clack rocker, the utility model discloses a valve clack directly rotates with the rotation axis and is connected, reduces the radius of rotation R that the valve clack main part opened and close, makes the valve clack open or close more laborsavingly, increases valve clack main part opening angle az simultaneously, makes the valve clack when opening, effectively reduces the valve clack to the fluid hindrance, makes the fluid resistance diminishes when moving on the runner, and the pressure loss becomes low, has certain energy-conserving effect, increases the balance body on the valve clack simultaneously, and the valve clack is in full open position, and the moment helping hand valve clack steady state operation that the balance body produced improves valve flow characteristic; the valve clack is in the position of closing entirely, and the moment helping hand valve clack that the balancing body produced closes, improves sealed tightness. The swing check valve is more excellent in sealing performance and operational characteristics than a conventional swing check valve.

Drawings

FIG. 1 is a schematic view of a conventional swing check valve;

fig. 2 is a schematic structural view of the valve flap of the swing check valve of the present invention at the fully open position.

Fig. 3 is a schematic structural view of the valve flap of the swing check valve of the present invention in the fully closed position;

FIG. 4 is an assembly view of the valve seat and flap.

Description of the reference numerals: 1. a valve body; 2. a valve seat; 3. a valve clack; 31. a valve flap body; 32. a balance body; 33. a connecting portion; 331. a rotation hole; 4. a rotating shaft.

Detailed Description

A swing check valve according to the present invention will be described in further detail with reference to fig. 1 to 4.

A swing check valve comprises a valve body 1, a valve seat 2 and a valve clack 3, wherein the valve seat 2 and the valve clack 3 are installed in the valve body 1, and the valve seat 2 is arranged on a flow passage of the valve body 1; the valve clack 3 comprises a valve clack main body 31 and a balance body 32, one end face of the valve clack main body 31 is matched with the valve seat 2, and the other end face is provided with a connecting part 33 for connecting the balance body 32; the connecting portion 33 is rotatably disposed on the valve body 1 through the rotating shaft 4, the rotating shaft 4 is disposed between the valve flap main body 31 and the balance body 32, the connecting portion 33 is provided with a rotating hole 331 matched with the rotating shaft 4, so that the valve flap 3 can rotate around the rotating shaft 4 to be matched with the valve seat 2, thereby realizing the opening or closing of the valve flap 3, and replacing the traditional installation mode of adopting a rocker of the valve flap 3, the rotating radius R for opening and closing the valve flap main body 31 is reduced, so that the valve flap 3 is more labor-saving to open or close, and the opening angle az of the valve flap main body 31 is increased, so that when the valve flap 3 is opened, the fluid obstruction of the valve flap 3 is effectively reduced, so that the flow resistance of the fluid on the flow channel during the operation is reduced, the pressure loss is reduced, and a certain energy-saving effect is achieved.

One end of the connecting portion 33 is connected to the upper end of the valve flap main body 31, and the other end is connected to the lower end of the balance body 32, so that the position of the center of gravity G of the balance body 32 can be changed following the change of the opening angle of the valve flap main body 31. When the valve clack 3 is in the fully closed position, the balance body 32 generates a positive moment Tc (clockwise direction), so that the valve clack main body 31 is tightly attached to the surface of the valve seat 2, and the sealing property is improved; when the valve flap 3 is in the fully open position, the balance body 32 generates a reverse torque To (counterclockwise), so that the valve flap 3 is stabilized at the maximum opening, and the vibration of the valve flap 3 caused by medium flow disturbance is eliminated or reduced. The swing check valve is more excellent in sealing performance and operational characteristics than a conventional swing check valve.

The rotating shaft 4 is arranged opposite to the valve seat 2 and above the center line of the flow passage, so that the rotating shaft 4 can be arranged at a position as close to the valve seat 2 as possible to further reduce the rotating radius R for opening and closing the valve clack body 31. Because the valve clack main body 31 is rotatably matched with the valve seat 2 through the rotating shaft 4, the sealing surface where the valve seat 2 is matched with the valve clack main body 31 is a spherical sealing surface, and the sealing surface where the valve clack main body 31 is matched with the valve seat 2 is a conical sealing surface, so that the sealing performance of the valve seat 2 and the valve clack main body 31 is improved.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A swing check valve comprises a valve body, a valve seat and a valve clack, wherein the valve seat and the valve clack are installed in the valve body; the method is characterized in that: the valve clack comprises a valve clack main body and a balance body, one end face of the valve clack main body is matched with the valve seat, and the other end face of the valve clack main body is provided with a connecting part for connecting the balance body;

the connecting part is rotatably arranged on the valve body through a rotating shaft, and the rotating shaft is positioned between the valve clack main body and the balance body.

2. A swing check valve as claimed in claim 1, wherein: one end of the connecting part is connected with the upper end of the valve clack main body, and the other end of the connecting part is connected with the lower end of the balance body.

3. The swing check valve of claim 1, further comprising: the rotating shaft is arranged opposite to the valve seat and is positioned above the center line of the flow passage.

4. A swing check valve as claimed in claim 1, 2 or 3, wherein: the sealing surface of the valve seat matched with the valve clack main body is a spherical surface sealing surface, and the sealing surface of the valve clack main body matched with the valve seat is a conical surface sealing surface.

5. A swing check valve as claimed in claim 1, wherein: the connecting part is provided with a rotating hole matched with the rotating shaft.