KR100992084B1 - Double-leaf disc movable ball valve - Google Patents

Abstract

The present invention relates to a two-leaf disc movable ball valve, the inlet and the outlet are formed on both sides, the central portion is formed with a spherical receiving portion, the valve body formed with a shaft fitting hole on the upper side; A pair of left and right bilobal discs, which are inserted into the receiving portion formed at the center of the valve body and are symmetrically formed to be separated from each other to open and close the fluid flowing from the inlet to the outlet; A hollow rotating shaft rotatably fitted in the shaft fitting hole formed in the central portion of the valve body; A disc arm installed between the lower end of the rotating shaft and the bileaf disc so that the left and right pair of bileaf discs are rotated together when the rotating shaft is rotated; A front and rear operation shaft that is rotatably fitted coaxially with the rotation shaft inside the hollow rotation shaft; And a front and rear drive unit installed between the front and rear operation shaft and the bileaf disc so that the left and right pair of bileaf discs move closer or farther from each other according to the rotation direction of the front and rear operation shaft when the front and rear operation shaft is rotated. By the same configuration, it is possible to minimize the contact resistance by structurally eliminating the rotational friction force generated when the disc sheet and the body sheet come into contact with each other so that the operation of the disc can be performed without difficulty.

Double-leaf disc, receiving part, rotating shaft, disk arm, operating shaft, ball valve

Description

Double-leaf disc movable ball valve {TWIN DISC MOVING TYPE VALVE}

The present invention relates to a two-leaf disc movable ball valve, and more particularly, a two-leaf disc movable type that structurally eliminates the rotational friction force generated by the contact between the disc sheet and the body sheet to minimize contact resistance. It relates to a ball valve.

Generally, as shown in FIG. 1, the ball valve is provided with a body rubber sheet 32 made of synthetic rubber or Teflon made of an elastic body on both the left and right sides of the valve body 31, and the body sheet 32 has a water hole (K). The complete spherical disk (ball) 33 having the rotational contact is rotatably contacted, and the disk 33 is mounted thereon with a rotation shaft 34 for rotating the disk 33 thereon. A structure has been conventionally used such that the spherical disc 33 contacts the body sheet 32 of the valve to achieve watertightness by 90 ° rotation.

However, the ball valve of the above structure has a gap when the body sheet 32 of the elastic body is worn out by continuous use, and a leak occurs, and the spherical disk (ball) rotates 90 ° when opening and closing the ball valve. When it rotates while continuously in contact with the valve body sheet 32 of the elastic body, the rotational force is required to open and close the valve by the contact resistance generated by the rotation while contacting the body sheet of the elastic body (32) There are many problems, such as breakage, and large diameter valves are not possible to precisely process the disc (ball), so there is a difficulty in producing large diameter ball valves, which cannot cope with the current trend of large-sized transport of fluid. In addition, the production of ball valves made of metal sheets required for high temperature and high pressure piping systems More difficult point is expected, and when supply of large-diameter ball valve is unsatisfactory, it is inevitable to configure the piping system to shut off the fluid using the conventional gate valve and globe valve. Unnecessary piping support due to the installation load due to the excessive weight of the main body also requires considerable operating force when opening and closing the gate and globe valve due to the characteristics of the gate valve and the glove valve, and the opening and closing time is long, resulting in considerable difficulties in efficient maintenance of the drifting. There is a problem.

The present invention has been made to solve the above-mentioned conventional problems, the object is to operate the disc by minimizing the contact resistance by structurally eliminating the rotational friction force generated by the disc and the valve body when the valve is to open, It is to provide a bi-lobe disc movable ball valve that prevents overload.

Another object of the present invention is to achieve a watertight, water-tight tapered structure of the body sheet of the valve body and the two-leaf disk, thereby reducing the processing cost due to the spherical machining of the disk, and the metal sheet portion for large diameter and high temperature and high pressure. It is to provide a bi-lobe disk movable ball valve that can also be used as a ball valve having.

In order to achieve the above object, the two-leaf disk movable ball valve according to the present invention is formed on both sides of the inlet and outlet, respectively, the central portion is formed with a spherical receiving portion, the valve body formed in the shaft fitting hole on the upper side; A pair of left and right bilobal discs, which are inserted into the receiving portion formed at the center of the valve body and are symmetrically formed to be separated from each other to open and close the fluid flowing from the inlet to the outlet; A hollow rotating shaft rotatably fitted in the shaft fitting hole formed in the central portion of the valve body; A disc arm installed between the lower end of the rotating shaft and the bileaf disc so that the left and right pair of bileaf discs are rotated together when the rotating shaft is rotated; A front and rear operation shaft that is rotatably fitted coaxially with the rotation shaft inside the hollow rotation shaft; And a front and rear drive unit disposed between the front and rear operation shaft and the bileaf disc so that the left and right pair of bileaf discs move closer or farther from each other according to the rotation direction of the front and rear operation shaft when the front and rear operation shaft is rotated. do.

Here, the front and rear drive unit, the bevel gear is rotated together with the front and rear operation shaft when the front and rear operation shaft is inserted into the lower end of the front and rear operation shaft; A pair of left and right bevel pinions which are tooth-coupled with the bevel gears; A pair of left and right nuts fixedly coupled to the pair of bevel pinions; And one side is engaged with the nut, and the other side is fixedly coupled to the bilobal disk, so that the pair of bilobal disks come closer to each other when the pair of nuts are rotated. It is preferable that it consists of a pair of screw shaft to make or away.

In addition, a pair of body sheets are formed at both edges of the receiving portion inside the valve body so as to have an inclined surface on the side adjacent to the inlet and the outlet, and a disc sheet having an inclined surface is formed at one side of both edges of the bileaflet disc. When the body sheet and the disc sheet are in close contact with each other, the inclined surface of the body sheet and the inclined surface of the disc sheet are preferably in contact with each other.

According to the double-leaf disc movable ball valve of the present invention, when the valve is to be opened, the contact friction can be minimized by structurally eliminating the rotational friction force caused by the contact between the disk and the valve body. have.

In addition, according to the two-leaf disk movable ball valve of the present invention, since the body sheet of the valve body and the disk sheet portion of the two-leaf disk form a watertight shape as a wedge-shaped taper structure, the processing cost due to the spherical machining of the disk can be reduced, and the large diameter and There is an effect that it can be used also as a ball valve having a metal sheet part for high temperature and high pressure.

In addition, according to the double-leaf disk movable ball valve of the present invention, since the square screw that can be self-fastening is used as a structure for moving the disk forward and backward, it is essentially prevented that the compressed disk is retracted by the fluid pressure after the valve is closed. At the source, the index can be guaranteed.

Hereinafter, a bi-lobe disk movable ball valve according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The two-leaf disc movable ball valve according to the present invention has a valve body 1, a pair of left and right two-leaf discs 4 and 5, a hollow shaft 8 and a disk arm 9 and 10, as shown in FIG. ), The front-rear operation shaft 16 and the front-rear drive part.

The valve body 1 has an inlet (L) and an outlet (M) are formed on both sides, respectively, a spherical receiving portion (1a) is formed in the center, the shaft fitting hole (N) is formed on the upper side, On both edges of the receiving portion 1a, a pair of body sheets 2 and 3 are formed on the side adjacent to the inlet L and the outlet M so as to have an inclined surface, and the inclined surface is a two-leaf disk which will be described later. The inclined surfaces of (4, 5) are brought into contact with each other. Here, the valve body 1 may be configured to separate the inlet portion (1b) and the body portion (1c) and the outlet portion (1d) as shown in Figure 2 to facilitate the production of the In addition, it may be configured by varying the form of each detailed component in various other ways.

The pair of left and right bilobal disks 4 and 5 are fitted to the receiving portion 1a formed at the center of the valve body 1 so as to open and close the fluid flowing from the inlet L to the outlet M. They are separated from each other and formed symmetrically, and may be linearly moved toward or away from each other toward the center of the accommodating part 1a, or may be rotated within the accommodating part 1a.

Disc seats 6 and 7 having inclined surfaces are formed on one side of both edges of the two-leaf discs 4 and 5, respectively, and inclined surfaces of the disc sheets 6 and 7 and inclined surfaces of the body sheets 2 and 3, respectively. When the contact is in close contact with the fluid flowing from the inlet (L) to prevent the outflow to the outlet (M) to maintain the watertight.

The hollow rotating shaft 8 is rotatably fitted in the shaft fitting hole N formed in the central portion of the valve body 1, one end of which to rotate the pair of two-leaf discs 4 and 5 simultaneously. Rotation action handle 20 is attached, the other end is fixedly coupled to the disk arms (9, 10) to be described later. Reference numerals 21 and 22 are stoppers for stopping the rotation of the rotation operation handle 20.

The disc arms 9 and 10 are installed between the lower end of the rotary shaft 8 and the bileaflet disks 4 and 5 so that the left and right pair of bileaflet disks 4 and 5 also come together when the rotary shaft 8 is rotated. In order to be rotated, the screw shaft (11, 12) to be described later is inserted in the inside so as to be movable, and the guide pins (18, 19) for inserting the side adjacent to the two-leaf disk (4, 5) Guide hole H is formed. The guide pins 18 and 19 guide the screw shafts 11 and 12 to be movable inside the disk arms 9 and 10 when the screw shafts 11 and 12 are linearly moved. .

The front and rear operation shaft 16 is rotatably fitted coaxially with the rotation shaft 8 inside the hollow rotation shaft 8, and a straight operation handle for rotating the front and rear operation shaft 16 thereon. 15) is formed, and the bevel gear 17 to be described later is fitted in the lower portion.

The front-rear drive unit is disposed between the front-rear manipulation shaft 16 and the bi-leaf disks 4 and 5 so that the left and right pairs are in accordance with the rotational direction of the front-rear manipulation shaft 16 when the front-rear manipulation shaft 16 is rotated. The bilobal discs 4 and 5 of each other are brought closer or further away from each other, including a bevel gear 17, a pair of right and left bevel pinions 13 and 14, a pair of left and right nuts P and Q, and a pair of screws. It consists of shafts 11 and 12.

The bevel gear 17 is fitted to the lower end of the front and rear operation shaft 16 and rotates together with the front and rear operation shaft 16 when the front and rear operation shaft 16 is rotated, and the pair of left and right bevel pinions 13, 14) is tooth-coupled with the bevel gear 17, the left and right pair of nuts (P, Q) is fixedly coupled to the pair of bevel pinions (13, 14) so that the pair of bevel pinions (13, 14) When it rotates, it rotates together.

The pair of screw shafts 11 and 12 are fitted into holes formed in the disk arms 9 and 10, respectively, so that one side is engaged with the nuts P and Q, and the other side is the double lobe disk 4. And (5) are fixedly coupled to allow the pair of bileaflet discs 4 and 5 to be close to or away from each other when the pair of nuts P and Q are rotated, wherein the screw shafts 11 and 12 ) Moves linearly inside the disc arms 9 and 10 according to the guides of the guide pins 18 and 19 movably inserted into the guide holes H formed at one end of the disc arms 9 and 10. Done.

The bileaflet disc movable ball valve according to the present invention configured as described above has a valve body (1) orthogonally installed on the conduit, and in the state in which the ball valve is closed, a pair of left and right pair of bileaflet discs (4) as shown in FIGS. , 5 respectively block the inlet (L) and the outlet (M) of the valve body (1), in this state the disk sheet of the two-leaf disk (4, 5) and the body sheet (2, of the valve body 1) 3) is contacted with each other to form a watertight as it is compressed into a wedge shape so that the flow of fluid flowing through the inlet (L) and outlet (M) of the valve body 1 is blocked without leakage.

When opening the valve in such a state, when the straight operation handle 15 at the upper end of the front and rear operation shafts 16 is rotated in the forward direction, the bevel gears 17 fitted and fixed at the lower end of the front and rear operation shafts 16 rotate together. When the bevel gear 17 is rotated, the left and right pair of bevel pinions 13 and 14 which are tooth-coupled with the bevel gear 17 are also linked together and rotated, and the pair of bevel pinions 13 and 14 ) Rotates the left and right pair of nuts (P, Q) fixedly coupled to the pair of bevel pinions (13, 14), respectively.

When the pair of left and right nuts P and Q are rotated, the screw shafts 11 and 12 screwed to the nuts P and Q are inserted into the disc arms 9 and 10, respectively. As shown in FIG. 4, the guide sheets 18 and 19 are linearly moved toward each other as shown in FIG. 4, so that the body sheets 2 and 3 and the two-leaf disks 4 and 5 of the valve body 1 are eventually moved. The disk sheets 6 and 7 are separated from each other in contact with each other. Here, the guide pins (18, 19) is inserted into the guide hole (H) formed in one end of the disk arms (9, 10) so that the screw shaft (11, 12) is the nut (P, Q) ) Is not rotated together with the nuts (P, Q), and allows linear movement within the disk arms (9, 10).

Then, when rotating the rotary operation handle 20 fixedly coupled to the upper portion of the rotary shaft 8 rotatably fitted in the shaft fitting hole (N) of the valve body 1, the rotary shaft 8 is rotated, When the rotating shaft 8 is rotated, the disk arms 9 and 10 fixedly coupled to the lower end of the rotating shaft 8 are also rotated in conjunction with the rotation of the rotating shaft 8, and the disk arms 9, 10 is rotated, the disk arms (9, 10) is one side is connected to the guide pins (18, 19), so as shown in Figure 5 with the rotation of the disk arms (9,10) The pair of bileaflet discs 4 and 5 are also rotated together to open the flow path of the valve so that the fluid flowing from the inlet port L side flows out to the outlet port M side. At this time, the two-leaf disk (4, 5) can be easily controlled the position of the rotation of the two-leaf disk (4,5) by a stopper installed to be spaced apart by 90 degrees to each other on both sides of the rotation operation handle 20 .

Then, when the valve flow path is to be closed again, the rotation operation handle 20 is rotated 90 degrees in the reverse direction, as shown in FIG. 4 while the left and right pairs of two-leaf disks 4 and 5 maintain a constant distance. As described above, when the inlet (L) and the outlet (M) of the valve body (1) are respectively blocked, when the straight operation handle (15) is rotated in the reverse direction opposite to the direction described above, the front and rear operation shafts (16) and As the bevel gear 17 fixed integrally rotates in the reverse direction, the left and right bevel pinions 13 and 14, which interlock with the bevel gear 17, rotate in a reverse direction so that the nuts P and Q are integral with the bevel pinions 13 and 14. Guide pins (2, 12) fixed to the bilobal disks (4, 5) on both the right and left sides of the disk arm (9, 10) to be movable in the guide holes (H) of the disk arms (9, 10). By the guidance of 18, 19, a pair of sinus bilobal disks 4, 5 move in a direction away from each other. 3, the disc sheets 6, 7 of the bileaflet discs 4, 5 are pressed against the body sheets 2, 3 of the valve body 1, and the valve is closed to close the inlet port L. As shown in FIG. Blocking the outlet (M) to block the flow of fluid to maintain a perfect water tightness. At this time, if the two screw disks (11, 12) of the screw shaft (11, 12) is made of square screws in order to prevent the reverse of each of the two-leaf disk (4, 5) in accordance with the pressure of the working fluid, it is essentially a two-leaf structure because it is a structure capable of self-fastening The backward movement of the disks 4 and 5 can be prevented so that perfect watertightness can be achieved without changing the fluid flow.

1 is a cross-sectional view showing a conventional ball valve,

Figure 2 is a cross-sectional view of the two-leaf disk movable ball valve according to the present invention,

Figure 3 is a schematic diagram for explaining a closed state of the flow path of the valve in the double-leaf disc movable ball valve according to the present invention,

Figure 4 is a schematic diagram for explaining a state in which the left and right pair of two-leaf disk close to each other in the two-leaf disk movable ball valve according to the present invention,

Figure 5 is a schematic diagram for explaining a state in which the left and right pair of two-leaflet disk is rotated in the two-leaf disk movable ball valve according to the present invention, the flow path of the valve is opened.

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

1: valve body 1a: receiving part

2, 3: body sheet 4, 5: double-leaf disc

6, 7: Disc sheet 8: Hollow rotary shaft

9,10: disk arm 11,12: screw shaft

13,14: Bevel pinion # 16: front and rear operation shaft

17: Bevel gear 20: Rotary steering wheel (

L: Inlet port M: Outlet port

N: Fitting hole: P, Q: Nut

Claims (3)

An inlet (L) and an outlet (M) are respectively formed at both sides, a central receiving portion (1a) is formed in the center portion, the valve body (1) formed with a shaft fitting hole (N) on the upper side; A pair of left and right bilobal discs, which are formed in a symmetrical manner, are separated from each other so as to be inserted into the receiving part 1a formed at the center of the valve body 1 and open and close the fluid flowing from the inlet L to the outlet M. (4,5); A hollow rotating shaft (8) rotatably fitted in the shaft fitting hole (N) formed in the central portion of the valve body (1); Disc arms 9 and 10 installed between the lower end of the rotary shaft 8 and the double lobe discs 4 and 5 so that the left and right pair of double lobe discs 4 and 5 also rotate together when the rotary axis 8 is rotated. ); A front and rear operation shaft 16 that is rotatably fitted coaxially with the rotation shaft 8 inside the hollow rotation shaft 8; And The pair of left and right pairs of double-leaf discs are disposed between the front and rear manipulation shafts 16 and the two-leaf discs 4 and 5 in accordance with the rotational direction of the front and rear manipulation shafts 16 when the front and rear manipulation shafts 16 are rotated. 4, 5) the front and rear drive unit to be closer or farther from each other; Double-leaf disc movable ball valve, characterized in that consisting of. The method of claim 1, The front and rear drive unit, Bevel gear 17 is inserted into the lower end of the front and rear operation shaft 16 and rotated together with the front and rear operation shaft 16 when the front and rear operation shaft 16 is rotated; A pair of left and right bevel pinions (13, 14) that are tooth-coupled with the bevel gear (17); A pair of left and right nuts (P, Q) fixedly coupled to the pair of bevel pinions (13, 14); And Inserted into a hole formed in the disk arms 9, 10, one side is engaged with the nuts (P, Q), the other side is fixedly coupled to the two-leaf disk (4, 5), the pair of nuts A pair of screw shafts (11, 12) for bringing the pair of two-leaf discs (4, 5) closer or away from each other when (P, Q) is rotated; Double-leaf disc movable ball valve, characterized in that consisting of. The method according to claim 1 or 2, A pair of body sheets 2 and 3 are formed at both edges of the receiving portion 1a in the valve body 1 and adjacent to the inlet L and the outlet M, respectively, to have an inclined surface. Disc sheets 6 and 7 having inclined surfaces are formed on one side of both edges of the double-leaf discs 4 and 5, and the body sheets 2 and 3 and the disc sheets 6 and 7 are in close contact with each other. A two-leaf disc movable ball valve, characterized in that the inclined surfaces of (2,3) and the inclined surfaces of the disc sheets (6,7) are in contact with each other.

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