KR200357381Y1 - Ball valve - Google Patents

Abstract

The present invention relates to a ball valve which improves the watertight structure of the valve ball for opening and closing the flow of a flow and at the same time prevents leakage of the valve shaft. As a first embodiment, the fluid in the valve body 20 is provided with the valve ball 30. In the ball valve, which opens and closes the passage, and the valve ball 30 is rotated by the valve shaft 40 provided in the axial housing 50, a disc shaft shaft 42 is formed at the lower end of the valve shaft 40. A teflon washer (60) formed at a lower end of the valve shaft (40) and disposed in close contact between a bottom surface of the shaft flange (42) and a bottom surface of the axial housing (50); Upper and lower chambers 73 and 72 inserted between the upper end of the valve shaft 40 and interposed between the shaft flange 42 and the upper surface of the celebrity housing 50 and closely contact each other by the elastic repulsive force of the spring 71. It characterized in that it comprises a mechanical seal 70 having a).

Description

Ball valve

The present invention relates to a ball valve, and more particularly to a ball valve to improve the watertight structure of the valve ball for opening and closing the flow of the flow rate and to prevent the leakage of the valve shaft.

In general, the ball valve is a spherical valve ball having a through hole on the fluid passage of the valve body, the valve ball is connected to the valve shaft to open and close the fluid passage while rotating in accordance with the operating direction of the valve shaft.

In the opening and closing operation of such a ball valve with a driving means (for example, a deceleration motor), if foreign matters caught in the valve ball, assembly failures, or frequent operation of the valve shaft occur, the driving means will be heavily loaded. Sometimes.

In order to solve this problem, the applicant has filed a patent No. 2003-67470 (name: ball valve) on Sep. 29, 2003. It has a structure in which a pair of uneven coupling rings are arranged on the valve shaft, and a pair of uneven coupling rings are pushed by the elastic means to form a primary watertight, and secondly, a second watertight is formed through rubber packing inserted into the valve shaft. to be.

Accordingly, the present inventors have an object to provide a ball valve to implement a leak prevention structure of the valve shaft and valve ball with a low cost and a simple installation structure.

The following drawings, which are attached in this specification, illustrate the preferred embodiments of the present invention, and together with the detailed description of the present invention, which serves to further understand the technical spirit of the present invention, the present invention is a matter described in such drawings. It should not be construed as limited to.

1 is an assembled cross-sectional view of a ball valve as a first embodiment according to the present invention.

2 is an exploded perspective view of the valve shaft portion of FIG.

3 is a modified example of the first embodiment.

Figure 4 is an assembled cross-sectional view of the ball valve as a second embodiment according to the present invention.

5 is a modified example of the O-ring applied to FIG.

Figure 6 is an assembled cross-sectional view of the ball valve as a third embodiment according to the present invention.

<Explanation of symbols for the main parts of the drawings>

30: valve ball

40: valve shaft

42: shaft flange

50: shaft housing

70: mechanical seal

80: oil seal

84: O-ring

90,92: Teflon seal

150: spring means

110: O-ring

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

First Embodiment

1 is an assembled cross-sectional view of a ball valve 10A as a first embodiment according to the present invention, FIG. 2 is an exploded perspective view of the valve shaft portion of FIG. 1, and FIG. 3 is a modified example of the ball valve 10A.

In Figures 1 and 2, the reference numeral 20 is a 'valve body' made of a metal material.

The valve body 20 has a fluid passage 22 having a fluid inlet and outlet 20a and 20b therethrough.

In the center of the fluid passage 22, a valve ball 30 for opening and closing the fluid passage 22 is located. The valve ball 30 is connected to a valve shaft 40 vertically inserted into the fluid passage 22. The valve ball 30 has a groove 31 into which the lower end of the valve shaft 40 is fitted.

The valve body 20 has a female threaded cylindrical portion 24 having a female thread so that the axial housing 50 is screwed, and the bottom surface of the cylindrical portion 24 has a hole 24a into which the valve shaft 40 is inserted. Have

The celebratory housing 50 has a cylindrical portion 52 having a male screw on an outer circumferential surface thereof, a polygonal head portion 54, and an axial insertion hole 56 penetrating through the center of the polygonal head portion 54.

The valve shaft 40 has a coupling portion 41 fitted into the valve groove 31 at a lower end thereof and a disc shaft shaft 42 having a disk shape thereon.

The valve shaft 40 has a Teflon washer 60, a mechanical chamber 70, and an oil chamber 80 inserted therein.

The Teflon washer 60 is disposed on the bottom surface of the shaft flange 42 and inserted into the valve shaft 40, and the mechanical chamber 70 is disposed between the shaft flange 42 and the oil chamber 80. Intervened.

At this time, the mechanical chamber 70 is in close contact with the lower chamber 72 and the upper chamber 73 by the elastic compression repulsive force of the spring 71 is in close mechanical contact.

The oil chamber 80 is mounted inside the axial housing 50 and is in close contact with the outer circumferential surface of the valve shaft 40. The oil chamber 80 has a structure in which an annular iron piece is inserted therein and a pair of annular lips are provided on an inner circumferential surface thereof, and any one of them is elastically repelled by a spring.

On the other hand, Teflon seals 90 and 92 are disposed at both sides of the valve ball 30, and these Teflon seals 90 and 92 are inserted into the inner surface of the fluid passage 22. 92 is fixed by a screwed ball cap 100 of the fluid passage 22, and each end surface of the Teflon seals 90 and 92 is elastically repellent O-ring 110 as a rubber or silicone material to prevent leakage Is interposed.

In the ball valve 10A of the first embodiment configured as described above, the mechanical chamber 70 side spring 71 pushes the lower chamber 72 upward by the compressive elastic repulsion force and pushes the shaft flange 42 downward. Is installed unloaded.

Therefore, the Teflon washer 60 is in close contact with the inner bottom surface 24b of the cylindrical body 24 side of the valve body 20 by the pressing force of the shaft flange 42. In addition, the upper chamber 73 and the lower chamber 72 of the mechanical chamber 70 are also slidably adhered to each other by forming a lubricating oil film.

And the oil chamber 80 is assembled in close contact with the outer circumferential surface of the valve shaft 40 in a state mounted on the upper portion in the axial housing 50.

Therefore, the ball valve 10A is spherical in the state in which the valve ball 30 is in close contact with the Teflon chambers 90a and 92a as the valve shaft 40 rotates, and as the position of the ball hole 32 changes, The fluid passage 22 is opened and closed.

At this time, the Teflon washer 60 smoothly supports the rotation of the valve shaft 40 in a state of being in close contact with the inner bottom surface 24b of the cylindrical body 24 on the valve body 20 side, and the upper part of the mechanical chamber 70. The mechanical seal of the sub-chamber 73 and the lower chamber 72 is primarily used to prevent leakage, and the leakage is essentially blocked by the oil chamber 80.

On the other hand, when the valve ball 30 completely shuts off the fluid passage 22, the ball cap 100 and the Teflon chamber 92 on the side of the ball cap 100 which becomes the outlet of the fluid passage 22 of the valve body 20. The leakage to the outlet 20b side is prevented by the restoring force that repels the elastic deformation of the O-ring 110 is caught.

Unexplained symbol '5' is 'O-ring'.

Meanwhile, as a modification of the first embodiment, the oil chamber 80 may be deleted as shown in FIG. 3. In this case, of course, the leak is prevented by the mechanical sealing of the mechanical seal (70).

Second Embodiment

4 is a cross-sectional view of the assembly of the ball valve 10B as a second embodiment according to the present invention, Figure 5 is a view showing a modified example of the O-ring applied to FIG.

According to the second embodiment of the present invention, the mechanical seal is removed, and oil chambers 80 and 82 are interposed between upper and lower ends of the valve shaft 40 as shown in FIG. It is configured to be positioned in the inside of one end is supported on the axial housing 50 side, the other end is supported by the shaft flange 42 of the valve shaft 40 to press the valve shaft 40 downward. In the second embodiment, the same or equivalent parts as those in Fig. 1 use the same symbols.

At this time, the lower side oil chamber 82 is in close contact with the Teflon washer 60 by the compression spring 150, the bottom is in close contact with the bottom surface of the cylindrical portion 24 side of the valve body 20, the inner diameter of the valve shaft It is installed in close contact with the outer peripheral surface of the 40.

In this case, the O-ring 110 installed in the fluid passage 22 of the valve body 20 may be reshaped with rubber or silicone as a ring shape having a circular cross section as shown in FIG. 4 or a square cross section as shown in FIG. 5. have.

Here, the oil chambers 80 and 82 have a structure in which annular iron pieces are inserted therein and a pair of annular lips are provided on an inner circumferential surface thereof, and any one of them is elastically repelled by a spring. to be.

As described above, the second embodiment is installed in the valve shaft 40 and oil chambers 80 and 82 positioned at the upper and lower sides are installed to prevent water leakage rising and falling along the valve shaft 40 in a first and second manner. To achieve.

Third Embodiment

6 is an assembled cross-sectional view of the ball valve 10C as a third embodiment according to the present invention.

According to the third embodiment of the present invention, as shown in FIG. 6, the lower side oil chamber 82 is removed in FIG. 4, and a plurality of O-rings 84 are installed at the lower end of the valve shaft 40, and the compression spring ( 150 is positioned inside the celebratory housing 50 so that one end thereof is supported by the celebratory housing 50 and the other end is supported by the axial flange 42 of the valve shaft 40 to push the valve shaft 40 downward. It is configured to be. 4 uses the same reference numerals as those in FIG. 2.

At this time, the O-ring 84 is made of rubber or silicone material and its inner circumference is elastically mounted in the annular groove 41 of the valve shaft 40, and its outer circumference is elastic on the inner surface of the axial support hole 21 of the valve body 20. It is installed in close contact with.

The oil chamber 80 is a structure in which an annular iron piece is inserted therein and an annular lip is provided in a pair on the inner circumferential surface, and any one of these ribs is elastically repelled by a spring.

Thus, in the third embodiment, the oil chamber 80 and the O-ring 84 which are inserted into the valve shaft 40 and positioned at the upper and lower portions thereof are installed to block leakage of water that rises along the valve shaft 40. Thereby achieving a waterproof function.

In the second and third embodiments, the leakage preventing structure and the action of the fluid passage 22 are the same as those in the second embodiment, and thus detailed description thereof will be omitted.

As described above, according to the ball valve of the present invention, the oil chambers 80, 82, the mechanical chamber 70, and the O-ring 84 are selected from each other by leaking from the valve shaft 40 to the valve shaft 40. It can be installed in the center, and it can realize perfect waterproofing twice.

In addition, the fluid passage 22 is provided with an O-ring 110 made of a rubber or silicone material to form a watertight with a restoring force according to the elastic deformation, it can effectively block the leakage.

As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto, and the technical idea and the following of the present invention are provided by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

As described above, according to the ball valve of the present invention, the oil chamber 80, 82, the mechanical chamber 70, and the O-ring 84 are selected from each other in combination with the valve shaft 40. By installing it, two times of perfect waterproof can be realized.

In addition, the fluid passage 22 is provided with an O-ring 110 made of a rubber or silicone material to form a watertight with a restoring force according to the elastic deformation, it can effectively block the leakage. In particular, the structure is simple and manufacturing cost can be reduced.

Claims (5)

In the ball valve that opens and closes the fluid passage in the valve body 20 by the valve ball 30, the valve ball 30 is rotated by the valve shaft 40 provided in the axial housing 50, A disk-shaped shaft flange 42 is formed at the lower end of the valve shaft 40, A teflon washer (60) inserted into a lower end of the valve shaft (40) and closely disposed between a bottom surface of the shaft flange (42) and a bottom surface of the axial housing (50); Upper and lower chambers 73 and 72 inserted between the upper end of the valve shaft 40 and interposed between the shaft flange 42 and the upper surface of the celebrity housing 50 and closely contact each other by the elastic repulsive force of the spring 71. Ball valve comprising a mechanical seal (70) having a). The method of claim 1, The oil chamber 80 which is mounted in the celebratory housing 50 and is disposed on the upper surface of the upper chamber 73 on the mechanical seal 70 side is inserted in close contact with the outer circumferential surface of the valve shaft 40. Ball valve, characterized in that. In the ball valve that opens and closes the fluid passage in the valve body 20 by the valve ball 30, the valve ball 30 is rotated by the valve shaft 40 provided in the axial housing 50, A disk-shaped shaft flange 42 is formed at the lower end of the valve shaft 40, A teflon washer (60) inserted into a lower end of the valve shaft (40) and closely disposed between a bottom surface of the shaft flange (42) and a bottom surface of the axial housing (50); An oil chamber (82) mounted on the bottom inner surface of the cylindrical portion (24) of the valve body (20) and inserted in close contact with the valve shaft (40) and disposed on the bottom surface of the Teflon washer (60); An oil chamber (80) mounted in the celebratory housing (50) and disposed on an upper surface of the upper chamber (73) of the mechanical seal (70) and in close contact with an outer circumferential surface of the valve shaft (40); Spring means for positioning the inside of the shaft housing 50, one end is supported on the shaft housing 50 side, the other end is supported by the shaft flange 42 of the valve shaft 40 to press the valve shaft 40 downward And a ball valve (150). In the ball valve that opens and closes the fluid passage in the valve body 20 by the valve ball 30, the valve ball 30 is rotated by the valve shaft 40 provided in the axial housing 50, A disk-shaped shaft flange 42 is formed at the lower end of the valve shaft 40, A teflon washer (60) inserted into a lower end of the valve shaft (40) and closely disposed between a bottom surface of the shaft flange (42) and a bottom surface of the axial housing (50); A plurality of O-rings (84) fitted to the lower end of the valve shaft (40) to be in close contact with the shaft support hole (24a) of the valve body (20); An oil chamber (80) mounted in the celebratory housing (50) and disposed on an upper surface of the upper chamber (73) of the mechanical seal (70) and in close contact with an outer circumferential surface of the valve shaft (40); Spring means for positioning the inside of the shaft housing 50, one end is supported on the shaft housing 50 side, the other end is supported by the shaft flange 42 of the valve shaft 40 to press the valve shaft 40 downward And a ball valve (150). The method according to any one of claims 1 to 4, The valve ball 30 is supported by the Teflon chamber (90,92) and at the same time the Teflon chamber (90,92) is deformed by the fastening force of the ball cap 100 is screwed to the fluid passage 22 of the valve body 20 Ball valve, characterized in that configured to be supported by the O-ring (110) made of rubber or silicone exerting close contact with the elastic repulsive force.