KR20130096934A - Wafer type swing check valve - Google Patents

Abstract

PURPOSE: A wafer type swing check valve is provided to improve the durability and extend the service life thereof by operating a disk without shaking. CONSTITUTION: A wafer type swing check valve (101) comprises a valve body (100), a liner (200), a disk (300), and a keypad (400). An opening is formed on the inner side of the valve body. The liner has a disk hole (211b) and a shaft groove. The disk hole is connected to the opening. The shaft groove is formed on one side of the disk hole and is located on the inner side of the opening. The disk has a hinge shaft and a disk body. The hinge shaft is inserted into the shaft groove. The disk body is extended from the hinge shaft and opens and closes the disk hole. The keypad covers portions of the shaft groove and is coupled to the liner through the opening.

Description

Wafer Type Swing Check Valve {Wafer Type Swing Check Valve}

The present invention relates to a valve, and more particularly to a wafer-type swing check valve.

In general, a valve is a device that regulates the flow of fluid through pipes and other passages. The control of the valve may be by means of a movable part of the valve which partially or completely opens and closes the passage of the pipe. Valves come in many forms, of which check valves are known.

The check valve is a valve that allows fluid to flow in only one direction, and is also referred to as a non-return valve because it keeps the fluid flow in only one direction and prevents backflow. For example, the check valve is installed on the discharge side of the pump to prevent water from flowing back through the pump, and is installed on the discharge side of the high water tank to prevent the water discharged from the pump from flowing into the high water tank. As such, check valves protect devices that may be affected by backflow, such as flow meters, pumps, and control valves.

The check valve is more specifically a swing check valve, a lift check valve, a Smolensky check valve, a tilting disk check valve, a wafer type disk check It may be classified into a type such as a wafer-type disk check valve.

Among them, the wafer type swing check valve is a flangeless structure, and is a thin plate-shaped valve inserted between the flanges of both pipe pipes so that fluid flows in only one direction. Wafer type swing check valves are widely used among the above-mentioned check valves because of their compact structure and low price.

1 is a perspective view of a wafer-type swing check valve according to an exemplary embodiment, and FIG. 2 is a cross-sectional view of the wafer-type swing check valve of FIG. 1 coupled to a pipe pipe.

As shown in FIGS. 1 and 2, the wafer-type swing check valve 1 according to an exemplary embodiment includes a metal valve body 10 and a resin liner 20 inserted into the valve body 10. ), And a disk 30 for opening and closing the valve hole 23 formed in the liner 20.

Here, the disk 30 is made of a resin material (for example, fluorine resin) such as the liner 20 in order to prevent leakage and characteristics of the fluid flowing along the valve hole 23. The disc 30 has a hinge shaft 31 to be opened and closed while swinging the valve hole 23, and the liner 20 has a recessed shaft groove 21 in which the hinge shaft 21 is mounted.

However, in the conventional wafer-type swing check valve 1, the disk 30 and the liner 20 are made of acid-resistant resin and used as a valve for acid resistance, so that a fixture such as a bolt (not shown) is used. The hinge shaft 31 of the disk 30 could not be fixed to the shaft groove 21 of the liner 20.

That is, the hinge shaft 31 of the disk 30 is simply inserted into the shaft groove 21 of the liner 20 without a special fastener, and one side of the hinge shaft 31 is in an open state. Therefore, as shown in FIG. 2, when the conventional swing check valve 1 is mounted between the pipe pipes P1 and P2, the hinge shaft 31 opened by the side of the pipe pipe P1 of any one of them. One side of the support) was to have a structure in which the opening and closing of the disk 30 was made.

Therefore, since the hinge shaft 31 of the disk 30 is easily separated from the shaft groove 21 of the liner 20, the wafer-type swing check valve 1 of the related art has a risk of loss, which makes it difficult to handle or store the valve. If the flow velocity of the fluid is increased in the pipe pipes (P1, P2) is installed, the disk 30 is released from the shaft groove 21 of the hinge shaft 31, the swing check valve (1) does not operate properly There was a problem.

In addition, since one surface of the hinge shaft 31 is supported by the side surface of the pipe pipe P1, the disc 30 has a limited inclination angle β that is opened by the pipe pipe P1, thereby limiting the valve hole 23. Since the open area of the conventional swing check valve (1) has a problem that the flow amount of the fluid is low.

When the opening and closing operation of the disk 30 is repeated, the disk 30 and the piping pipe P1 are damaged by friction between the hinge shaft 31 of the disk 30 and the piping pipe P1, and fluid leaks. there was.

Accordingly, an object of the present invention is to provide a wafer-type swing check valve that can improve the performance of the valve by increasing the open inclination angle of the disk and preventing damage to the disk and the pipe pipe. .

In order to achieve the above object, the present invention provides a valve body through which the opening is formed inside; A disk hole communicating with the opening and a shaft groove recessed to one side of the disk hole is formed, and the liner is mounted to the valve body so that the shaft groove is positioned in the width direction of the opening; A disk having a hinge shaft fitted to the shaft groove and a disk body extending from the hinge shaft to open and close the disk hole, the disk mounted to the liner; And a keypad covering a portion of both edges of the shaft groove into which the hinge shaft is inserted and coupled to the liner through a width direction of the opening.

The length of the hinge shaft may be greater than or have a diameter of the disk body.

The shaft groove may have a length greater than or greater than the diameter of the disk hole.

The liner has an inner portion in which the disc hole and the shaft groove are formed, and an outer portion in which the keypad is fitted so as to be positioned in the width direction of the valve body and is protruded from the inner edge portion of the valve body, and coupled to one side of the valve body. 1 liner; And a second liner coupled to the first liner on the other side of the valve body.

The keypad may surround both edge regions of the hinge axis.

The keypad may be made of a material having a lower thermal expansion coefficient than that of the liner.

The liner and the disk may be made of tetrafluoroethylene (PFA), and the keypad may be made of polytetrafluoroethylene (PTFE).

Thus, according to the wafer-type swing check valve of the present embodiment has the following effects.

First, since the disk is not arbitrarily separated from the liner, there is no risk of component loss, which is convenient when handling or storing the check valve.

Second, when mounted and used in the pipe pipe, even if the flow rate of the fluid is fast, since the disk is not released from the liner can be precisely opened and closed at the correct position it can be maintained intact the function of the check valve.

Third, since the hinge axis of the disk is not in direct contact with the pipe pipe, it is possible to increase the open inclination angle of the disk, thereby increasing the transport volume of the fluid, and preventing damage caused by the wear of the disk and the pipe pipe.

Fourth, since the disk is operated at the minimum clearance without shaking, the durability can be improved and the life can be extended, and the maximum angle of the disk does not change due to the keypad at the time of opening, so that a constant flow rate can be obtained.

1 is a perspective view of a wafer-type swing check valve according to a conventional embodiment.
2 is a cross-sectional view of the wafer-type swing check valve of FIG. 1 coupled to a pipe pipe.
3 is a perspective view of a wafer-type swing check valve according to an embodiment of the present invention.
4 is a partially exploded perspective view of the wafer-type swing check valve of FIG. 3.
5 is an exploded perspective view of the liner of FIG. 4 separated.
FIG. 6 is a front view of FIG. 3 showing (A) disk and (B) liner region. FIG.
7 is a cross-sectional view of the wafer-type swing check valve of FIG. 3 coupled to a pipe pipe.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

3 is a perspective view of a wafer-type swing check valve according to an embodiment of the present invention, Figure 4 is a partially exploded perspective view of the wafer-type swing check valve of Figure 3, Figure 5 is a separate form of the liner of Figure 4 6 is an exploded perspective view showing the (A) disk and (B) liner area as a front view of FIG.

3 to 6, the wafer-type swing check valve 101 according to an embodiment of the present invention includes a valve body 100, a liner 200, a disk 300, and a keypad 400. It can be configured.

The valve body 100 may be referred to as a body (Body), it may serve as a main body for mounting the swing check valve 101 between the pipe pipes (P1, P2, see FIG. 7). For example, the valve body 100 may be formed in a donut shape so as to correspond to the shape of the flanged pipe pipe (P1, P2, Figure 7).

The valve body 100 may have a shape in which the opening 110 penetrates the inner side as shown in FIG. 5. The opening 110 may include a conduit through which the fluid passes. For example, the valve body 100 may include an opening having a shape similar to that of the liner 200 so that the disc hole 211b and the shaft groove 211a of the liner 200 to be described later may be formed in the valve body 100. 110). That is, the valve body 100 may serve as an injection mold that can be molded integrally by injection molding the liner 200 made of a resin material.

Of course, if necessary, the opening 110 may have a shape in which one concentric circle penetrates the inner side of the valve body 100 in the width W direction, and may have various other shapes.

The valve body 100 is made of a metal material, a plurality of bolt fastening groove 120 that can be fastened to the flange and the bolt (not shown) of the pipe pipes may be formed on the outside.

The liner 200 is coupled to the valve body 100 to form a part in direct contact with the fluid. Therefore, the liner 200 may be mounted to the valve body 100 to communicate with the opening 110. The liner 200 may have a disk hole 211b communicating with the opening 110 of the valve body 100 and a shaft groove 211a recessed to one side of the disk hole 211b.

The disk hole 211b has a structure which is slightly smaller than the disk body 320 of the disk 300 to be described later and is formed through the opening so as to form a conduit through which the fluid moves so as to communicate with the opening 100 of the valve body 100. Have The shaft groove 211a may have a shape recessed to be connected to the upper region of the disk hole 211b. The shaft groove 211a may have an appropriate length in the horizontal direction.

Here, the liner 200 mounted to the valve body 100 should have the shaft groove 211a located in the width (W) direction of the opening 110. For example, the position of the shaft groove 211a may be located at the center of the width W of the valve body 100 illustrated in FIGS. 4 and 5.

The liner 200 may have a form in which the first liner 210 and the second liner 220 are coupled as shown in FIG. 5.

The first liner 210 has an inner portion 211 formed with a disc hole 211b and a shaft groove 211a so as to be positioned in the width W direction of the valve body 100, and protrudes from an edge region of the inner portion 211. To have an outer portion 213 into which the keypad 400 is fitted. The first liner 210 having an inner part 211 and an outer part 213 may be coupled to one side of the valve body 100.

The second liner 220 may be coupled to the first liner 210 through the other side of the valve body 100.

The liner 200 described above may be made of a resin material. For example, the liner 200 may be made of tetrafluoroethylene (PFA) resin, which is a fluororesin series.

Therefore, the liner 200 may be made of a separate resin and then mounted on the valve body 100, that is, the first liner 210 and the second liner 220 are separately manufactured and coupled to the valve body 100. Alternatively, the first liner 210 and the second liner 220 may be manufactured by injection molding at a time, and the liner 200 may be integrally formed on the valve body 100.

The disk 300 has a hinge shaft 310 fitted into the shaft groove 211a and a disk body 320 extending from the hinge shaft 310 to open and close the disk hole 211b as shown in FIG. 200 may be mounted. The disk 300 may be made of a fluororesin-based, for example, tetrafluoroethylene (PFA) resin, like the liner 200 described above.

In this case, the disk 300 may have a length L1 of the hinge shaft 310 greater than or equal to the diameter D1 of the disk body 320.

Since the swing check valve 101 has a structure in which the hinge shaft 310 is directly supported by the pipe pipes P1 and P2, the hinge shaft 310 has a diameter D1 of the disc body 320. It is different from the point formed smaller than).

That is, in the embodiment of the present invention, the swing check valve 101 is formed so that the length L1 of the hinge shaft 310 is larger or larger than the diameter D1 of the disc body 320. Both edge regions may be supported by the keypad 400 to be described later.

In addition, the length L2 of the shaft groove 211a of the liner 200 is equal to that of the disk hole 211b so that the disk 300 may be efficiently mounted on the liner 200. It may be formed larger than or have a diameter (D2).

The keypad 400 covers a portion of both edges of the shaft groove 211a in which the hinge shaft 310 of the disk 300 is inserted, and may be coupled to the liner 200 through the width W direction of the opening 110. have.

The keypad 400 may be formed in a ring shape and may be fitted inside the outer side portion 213 of the liner 200 and may cover both edge regions of the hinge shaft 310. The keypad 400 may be detachably coupled with the liner 200 and may be configured to be easily replaced with a new keypad 400 by necessity such as breakage or aging.

Although not illustrated in another embodiment, the outer surface of the keypad 400 is formed with a thread, and the inner surface of the outer portion 213 of the liner 200 is formed with a thread, and the keypad 400 is connected to the liner 200. It may be screwed in.

In addition, the keypad 400 is not limited to the above-described embodiment as long as it can support both edge regions of the hinge shaft 310, and may be modified in other forms.

The keypad 400 may be made of fluorine resin similarly to the liner 200 described above. In this case, the keypad 400 may be formed of a material having a smaller thermal expansion rate than the liner 200 in consideration of the point of contact with the pipe pipe P1 and the contact with the hinge shaft 310 when the fluid temperature is high.

For example, the keypad 400 may be made of polytetrafluoroethylene (PTFE) resin. Accordingly, the keypad 400 may prevent the fluid from being easily worn or broken by an increase in the temperature of the fluid or by repeated contact with the hinge shaft 310.

7 is a cross-sectional view of the wafer-type swing check valve of FIG. 3 coupled to a pipe pipe.

In the wafer type swing check valve 101 according to the present embodiment, the hinge shaft 310 of the disk 300 is inserted into the shaft groove 211a of the liner 200 through the keypad 400, as shown in FIG. It can be fixed rotatably.

Therefore, when the swing check valve 101 is mounted between the pipe pipes P1 and P2, the hinge shaft 310 of the conventional wafer type swing check valve 1 is fixed by the pipe pipes P1 and P2. Unlike the structure, the swing check valve 101 of the present invention is in contact with the keypad 400 without the side surface of the pipe pipe P1 being in contact with the hinge shaft 310.

Thus, the swing check valve 101 of the present embodiment has a structure in which the hinge shaft 310 is supported without the interference of the pipe pipe P1 and the disk 300 is opened and closed. Therefore, in the wafer type swing check valve 101 of the present embodiment, since the opening and closing of the disc 300 is not limited by the pipe pipe P1, the inclination angle α of the disc 300 of the present embodiment is opened according to the conventional swing check valve. Since it becomes larger than the inclination angle (1) of (1), there is an effect that the flow amount of the fluid can be increased.

And even if the opening and closing operation of the disk 300 is repeated, the hinge shaft 310 of the disk 310 is not in contact with the pipe pipe P1, so that the hinge shaft 31 and the pipe pipe of the conventional disk 30 (see FIG. 2) ( Friction with P1 may damage the disk 30 and the pipe pipe P1, and may prevent the leakage of the fluid.

As described above, according to the swing check valve 101 of the present embodiment, since the disk 300 is not separated from the liner 200 arbitrarily, there is no fear of component loss, which is convenient when handling or storing the valve.

In addition, when the swing check valve 101 of the present embodiment is mounted to the pipe pipes P1 and P2, even if the flow velocity of the fluid is increased, the disc 300 is not separated from the liner 200 so that the opening and closing at the correct position is performed. This enables the check valve to remain intact.

In the swing check valve 101 of the present embodiment, the pivot shaft 310 of the disk 300 does not directly contact the pipe pipe P, thereby increasing the opening inclination angle of the disk 300 to increase the amount of fluid transport. And it can prevent the damage caused by the wear of the disk 300 and the pipe pipe (P1) in advance.

Furthermore, the swing check valve 101 of the present embodiment can operate without shaking the disk 300 at the minimum clearance, thereby improving the durability and extending the service life, and the maximum angle of the disk 300 due to the keypad 400 at the time of opening. Since it does not change, a constant flow rate can be obtained.

The description above is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas which are within the scope of the same should be interpreted as being included in the scope of the present invention.

101: swing check valve 100: valve body
110: opening 200: liner
210: first liner 211: inner part
211a: shaft groove 211b: disc hole
213: outer portion 220: second liner
300: disk 310: hinge axis
320: disk body 400: keypad
P1, P2: Piping pipes (P1, P2) L1, L2: Length
D1, D2: Diameter W: Width

Claims (7)

A valve body having an opening formed therein;
A disk hole communicating with the opening and a shaft groove recessed to one side of the disk hole is formed, and the liner is mounted to the valve body so that the shaft groove is positioned in the width direction of the opening;
A disk having a hinge shaft fitted to the shaft groove and a disk body extending from the hinge shaft to open and close the disk hole, the disk mounted to the liner; And
A keypad covering a portion of both edges of the shaft groove into which the hinge shaft is inserted and coupled to the liner through a width direction of the opening;
Wafer type swing check valve comprising a. The method of claim 1,
And a length of the hinge shaft is greater than or equal to the diameter of the disk body. The method of claim 2,
The length of the shaft groove is a wafer-type swing check valve is formed to have a diameter or larger than the diameter of the disk hole. 4. The method according to any one of claims 1 to 3,
The liner
A first liner having an inner portion in which the disc hole and the shaft groove are formed and an outer portion in which the keypad is fitted so as to be positioned in the width direction of the valve body, the outer portion into which the keypad is fitted; And
A second liner coupled to the first liner on the other side of the valve body;
Wafer type swing check valve comprising a. 5. The method of claim 4,
The keypad is a wafer-type swing check valve wraps around both edges of the hinge axis. The method of claim 5,
The keypad is a wafer-type swing check valve made of a material having a lower thermal expansion coefficient than the liner. The method according to claim 6,
The liner and the disk is made of tetrafluoroethylene (PFA, tetrafluoroethylene) resin, the keypad is a wafer type swing check valve made of polytetrafluoroethylene (PTFE, polytetrafluoroethylene) resin.

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