KR100290031B1 - A method for maintaining a seat life of a butterfly valve and an apparatus thereof - Google Patents

Abstract

PURPOSE: A life span extension method of a butterfly valve seat and a device thereof are provided to lengthen a life span of the seat by minimizing wear from friction with turning an opening disk in separating the seat from the disk. CONSTITUTION: A seat(20) is supported in a fluid passage(11) of a valve body(10) by a disk covering(30). An opening disk(40) is turned in an inner wall(21) of the seat, and turned by a rotating shaft(41). The fluid passage is opened and closed by contacting and separating an outer face(40a) of the disk from the inner wall of the seat in driving an actuator. The valve is opened with turning the disk in spacing the seat from the outer face of the opening disk, and closed with contacting the outer face of the opening disk to the inner wall of the seat by turning the disk reversely in returning the seat. Life span of the valve seat is lengthened, and reliability is improved with opening and closing the valve conveniently.

Description

A METHOD FOR MAINTAINING A SEAT LIFE OF A BUTTERFLY VALVE AND AN APPARATUS THEREOF

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a butterfly valve, and more particularly, to a relationship between an open / close disk that rotates in a fluid passage of a valve body to provide open / close of a valve and an airtight seat provided for airtightness of the open / close disk. The opening and closing operation is provided in a state in which the position of the seat is changed out of the rotation trajectory range of the opening and closing disc during the rotation operation of the opening / closing disc, thereby eliminating friction between each other, thereby minimizing wear of the soft material sheet, thereby prolonging the life of the sheet. The present invention relates to a method and a device for maintaining a seat life of a butterfly valve, which is easy to open and close by providing smooth operation by a small force during opening and closing of an opening / closing disk and maximizing convenience.

In general, the butterfly valve of the prior art, as shown in Figures 1 and 2, the disk seal of the valve seat 200 is made of rubber, Teflon resin, a similar elastic material, the fluid passage (inside the valve body 100) 110 is supported and fixed and installed by a disc covering 300 that is assembled to the screw in its external state,

The inner wall 201 of the seat 200 is rotatably assembled to the opening and closing disk 400 by the rotation shaft 410, one end of the rotation shaft 410 is supported by the boss 120 of the valve body 100 The other end extends through a hole 140 penetrating through the neck 130 extending from the valve body 400 and is connected to the extended rotating shaft 410 by an actuator to operate the actuator. The opening / closing disk 400 is configured such that the outer surface 401 opens or closes the fluid passage 110 by detachment or close contact with the inner wall 201 of the seat 200.

In the conventional butterfly valve, the opening and closing disk 400 is rotated in the transverse direction perpendicular to the axial direction (Y) of the rotating shaft 410 on the inner wall 201 of the seat 200 is The opening / closing disk 400 has the most contact friction with the sheet 200 at both the center point 0 and the outer surface points T at both the axial direction Y and the rotation orthogonal line X direction of the rotation shaft 410. Becomes loud.

Therefore, the sheet 200 is a disadvantage that occurs severely uneven wear and can not be used due to the lack of airtight maintenance with the opening and closing disk 400.

Therefore, in recent years, the axial direction (Y) of the rotating shaft 410 is installed to be eccentric with the center point (0) of the opening / closing disk (400) as an improved direction for extending the life of the sheet (200), or the rotating shaft By extending the axial direction (Y) of the (410) from the opening and closing disk 400, the radius of rotation of the opening and closing disk 400 is gentle to the inner wall 201 and the outer surface of the sheet 200 A method of reducing the contact wear rate with 401 is disclosed.

However, such a technique merely reduces the amount of uneven wear of the sheet 200, and cannot completely exclude the uneven wear of the sheet 200, thus extending the service life a little longer, and according to the design change of the opening / closing disk 400. There is a disadvantage that the total volume of the valve is not practical.

The present invention has been researched and developed to effectively solve the disadvantages of the prior art as described above,

An object of the present invention is to provide a method for maintaining the seat life of the butterfly valve that can maximize the seat life of the airtight purpose that can be called the life of the valve even for long-term use of the valve.

SUMMARY OF THE INVENTION The present invention provides a seat life support device for a butterfly valve embodying the method of the present invention.

An object of the present invention is to provide a method for maintaining the seat life of the butterfly valve that can be provided with a small force of the opening and closing operation of the valve to ensure the convenience of operation, and also to minimize the driving load of the related equipment to provide economy There is.

SUMMARY OF THE INVENTION The present invention provides a seat life support device for a butterfly valve embodying the method of the present invention.

The object of the present invention is to provide an open state of the valve by the forward rotation of the opening and closing disk in a state in which the airtight seat is installed in the valve body variablely positioned the inner wall position so that the outer surface of the opening and closing disk does not interfere from the rotational trajectory range. and,

A method in which the seat is closed by a return operation by reverse rotation of the open / close disk in a variable position state of the seat and the seat returns to its original position and the inner wall of the seat is in close contact with the outer surface of the open / close disk to provide a closed state of the valve; Implemented by an apparatus that implements this method.

1 is a front view of a conventional butterfly valve,

2 is a longitudinal cross-sectional view of FIG.

3 is a conceptual diagram illustrating the method of the present invention;

4 is a front view of the invention valve of the present invention,

5 and 6 are enlarged cross-sectional views taken along the line A-A of Figure 4,

5 is a closed state diagram of a valve,

6 is an open state diagram of the valve,

7a to 7c is an enlarged view showing the operation of the present invention,

Figure 7a is a fully closed state of the close contact between the open disk and the seat,

Figure 7b is a state in which the sheet is spaced apart from the trajectory range of the opening and closing disk,

Figure 7c is an open state diagram by the rotation of the opening and closing disk,

Figure 8 is an enlarged cross-sectional view of some excerpts showing another embodiment of the present invention.

<Explanation of symbols for main parts of the drawings>

10 valve body 11 fluid passage 12 air supply passage

13: annular air passage 14, 15: O-ring 20: seat

21: inner wall 22: groove 23: compression spring

30: disc covering 40: opening and closing disk 40a: outer surface

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

First, the method of the present invention will be described with reference to the accompanying drawings, and the apparatus of the present invention will be described in detail with reference to FIGS. 4 to 7.

First, the method of the present invention is supported and assembled by a disc covering 30 in which the seat 20 is assembled to the outside of the fluid passage 11 of the valve body 10 and the inner wall 21 of the seat 20. ), The opening and closing disk 40 is rotatably assembled by the rotating shaft 410, by the operation of the actuator (actuator) assembled to the rotating shaft 41, the opening and closing disk 40 by the forward, reverse rotation operation of its outer surface In which 40a opens or closes the fluid passage 11 by detachment or close contact with the inner wall 21 of the seat 20,

The seat 20 is a valve opening by the forward rotation of the open and close disk 40 in a state in which the position of the inner wall (21) is variably positioned so as not to interfere with the range of the rotational trajectory range of the outer surface (40a) of the opening and closing disk (40). Done,

In the variable position state of the seat 20, the opening and closing disk 40 is closed by the return operation by reverse rotation, and at the same time, the seat 20 returns to the original position and the outer surface 40a of the opening and closing disc 40 is The inner wall 21 of the seat 20 is in close contact with the valve provides a method for maintaining the seat life of the butterfly valve.

Apparatus of the present invention for implementing the method of the present invention in detail as shown in Figures 3 to 7,

The seat 20 is supported on the fluid passage 11 of the valve body 10 by a disc covering 30 assembled to the outside thereof, and the opening / closing disc 40 is mounted on the inner wall 21 of the seat 20. Is rotatably assembled by the rotating shaft 41, the opening and closing disk 40 is forward and reverse rotation operation by the operation of the actuator (actuator) assembled to the rotating shaft 41, its outer surface 40a is the seat ( In the butterfly valve for opening or closing the fluid passage 11 in close or out of contact with the inner wall 21 of the 20,

Between the valve body 10 is in communication with the air supply passage 12 provided on one side in the state provided with the annular air passage 13, the seat 20 is a predetermined distance from the disc covering 30 ( L) is assembled, but the annular air passage 13 is kept airtight with the seat 20 by O-rings 14 and 15 assembled to the valve body 10,

The seat 20 has a compression spring 23, one side of which is supported on the disc covering 30 in a plurality of grooves 22, which are arranged at appropriate intervals circumferentially at opposite positions of the annular air passage 13. It is seated and made in close contact with the annular air passage 13.

The valve opening operation of the present invention is pressurized through an air supply path 12 provided at one side of the valve body 10 by an air pump (not shown), which is a separate air supply source, as shown in FIG. 7A. Air is supplied.

Simultaneously with this operation, the pressurized air is supplied to the annular air passage 13 and the sealing pressure is operated, thus being installed in the valve body 10 and held by the compression spring 23 in a state of airtightness. By pressing the rear surface of the sheet 20 in close contact with the annular air passage 13 to advance by the separation distance (L) with the disc covering 30 and the outer surface (40a) of the opening and closing disk 40 The sheet 20 is positioned outside the rotational track line of the outer surface 40a of the opening / closing disk 40 by displacing the close contact state of the contact space with the spaced apart state (see FIG. 7B).

In this state, the opening / closing disk 40 rotates by the rotation shaft 41 to rotate forward without any interference with the inner wall 21 of the seat 20 to open the fluid passage 11 of the valve body 10. (See Figures 2 and 7C)

The valve closing operation of the present invention blocks the fluid passage 11 of the valve body 10 by the return operation by reverse rotation in the variable position (advanced) state of the seat 20 and At the same time, when the air pressure is removed from the annular air passage 13, the seat 20 is returned to its original position by the elastic force of the compression spring 23, and the seat 20 is formed on the outer surface 40a of the opening / closing disk 40. The inner wall 21 of the c) is in close contact with each other to maintain the closed state of the valve.

Therefore, the present invention eliminates contact friction between the seat 20 and the opening / closing disk 40 according to the opening and closing operation of the valve so that there is no uneven wear of the seat 20 as in the prior art, and the opening and closing disk 40 according to the valve opening and closing. Rotation is performed in a state in which contact with the seat 20 is excluded, thereby enabling operation with a small force.

On the other hand, Figure 8 is another embodiment of the present invention is different from the preferred embodiment of the present invention is that the seat 20 is annular air opposed to the annular air passage 13 provided in the valve body 10 The groove 24 is formed, and the air supply passage 25 communicating therewith is configured to communicate at one side of the valve body 10, but the annular air groove 24 is assembled to the disc covering 34. 31, 32) is kept confidential,

In the closing operation of the valve, the return operation of the seat 20 retracts the seat 20 by the pressurized air supplied through the air supply passage 25 so that the outer surface 40a of the opening / closing disk 40 is closed. In close contact with the inner wall surface and maintains a closed state, and when it is opened again, removes the pressurized air filled in the annular air groove 24 and at the same time the annular air passage of the valve body 10 configured in the opposite position. The pressurized air supplied to the (13) is to maintain the open state in the same order as the above-described operation of the release to advance the sheet 20.

In this invention, the timing of supply and removal or removal and removal of the pressurized air of the annular air supply passage 13 and the air groove 24 for the displacement operation of the seat 20 is a conventional speed controller It turns out that it is possible by linkage operation by the same control mechanism.

As described in detail above, the present invention has the effect of maximizing the life of the airtight seat, which can be called the life of the valve even in the long-term use of the butterfly valve,

The opening and closing operation of the valve is easily performed with very little force, thereby providing the effect of maximizing the convenience of use by the ease of operation, thereby maximizing the reliability of the product.

Claims (3)

The seat 20 is supported on the fluid passage 11 of the valve body 10 by a disc covering 30 assembled to the outside thereof, and the opening / closing disc 40 is mounted on the inner wall 21 of the seat 200. Is rotatably assembled by the rotary shaft 41, by the operation of the actuator assembled to the rotary shaft 41, the opening and closing disk 40 is forward, reverse rotation operation of the outer surface 40a of the seat 20 In opening or closing the fluid passage 11 by detachment from or close to the inner wall 21, The seat 20 has a valve opening by forward rotation of the opening / closing disk 40 in a state in which the position of the inner wall 21 is variably positioned so as not to interfere with the range of the rotational trajectory of the outer surface 40a of the opening / closing disk 40. Done, In the variable position state of the seat 20, the opening / closing disc 40 is closed by a return operation by reverse rotation, and the seat 20 returns to its original position so that the outer surface 40a of the opening / closing disc 40 A method for maintaining the seat life of a butterfly valve, characterized in that the valve is closed by the inner wall (21) of the seat 20 is in close contact. The seat 20 is supported on the fluid passage 11 of the valve body 10 by a disc covering 30 assembled to the outside thereof, and the opening / closing disc 40 is mounted on the inner wall 21 of the seat 200. Is rotatably assembled by the rotary shaft 41, the operation of the actuator (actuator) assembled to the rotary shaft 41, the opening and closing disk 40 is forward, reverse rotation operation thereof its outer surface (40a) is the sheet ( In the butterfly valve for opening or closing the fluid passage 11 by detachment or close contact with the inner wall 21 of the 20, The valve body 10 communicates with the air supply passage 12 provided at one side, and the seat 20 has a predetermined separation distance from the disc covering 30 in a state where the annular air passage 13 is provided. L) is assembled, but the annular air passage 13 is kept airtight with the seat 20 by O-rings 14 and 15 assembled to the valve body 10, The seat 20 has a compression spring 23, one side of which is supported on the disc covering 30 in a plurality of grooves 22, which are arranged at appropriate intervals circumferentially at opposite positions of the annular air passage 13. Seating device of the butterfly valve, characterized in that seated and in close contact with the annular air passage (13). 3. The seat 20 of claim 2, wherein the seat 20 forms an annular air groove 24 facing the annular air passage 13, and has an air supply passage 25 communicating with the annular air passage 13. In the communication configuration, the annular air groove 24 is seat life maintenance device of the butterfly valve, characterized in that the airtight is maintained by the O-ring (31,32) is assembled to the disc covering (34).