KR102066791B1 - Gate valve - Google Patents

Abstract

The present invention relates to a gate valve, comprising: a valve housing having a flow path therein; A valve shaft rotatably mounted to the valve housing; A nut part screwed to the valve shaft and lifted according to the rotation of the valve shaft; An upper portion is coupled to the nut portion, and is mounted to the inside of the valve housing so as to be movable up and down, and includes a disk assembly for opening and closing the flow path of the valve housing, the disk assembly has a first nut portion receiving portion at the top And a first disc configured to receive a part of the nut part to be suspended by the first nut part accommodating part, and to be supported to be elevated. And a second nut part accommodating part at an upper part thereof, and coupled to the second nut part accommodating part to accommodate another part of the nut part so as to be movable up and down with respect to the first disc while being in contact with the first disc. It provides a gate valve comprising a second disk.

Description

Gate valve {GATE VALVE}

The present invention relates to a gate valve, and more particularly to a gate valve for reducing the operating torque and the resistance of the disk.

The gate valve is a valve in which the valve disc moves up and down to open and close the flow path in the vertical direction.

Gate valves can be divided into outer and inner threaded gate valves according to the thread type of the valve shaft (STEM, SHAFT).

The external threaded gate valve is vertically opened and closed by the shaft (STEM) and disk (DISC) of the valve. When the shaft is opened and closed, the shaft protrudes by a certain distance (STROKE).

Inner threaded gate valve is a method in which the shaft and disk of the valve are opened and closed vertically. When the shaft is opened and closed, the disk moves vertically by rotating in place. It is mainly used in a narrow working space.

The inner threaded gate valve includes a valve shaft rotatably mounted on an upper portion of the valve housing, a nut portion screwed with the threaded portion of the valve shaft to be elevated along the threaded portion, and a disk coupled with the nut portion to be elevated. (DISC).

The disk can be elevated in accordance with the rotational direction of the valve shaft to open and close the flow path formed inside the valve housing.

On the other hand, the conventional disk is formed in a substantially disk shape, divided into two along the circumferential direction, the divided two disk 1 and the disk 2 may be integrally combined to be elevated in the vertical direction along the valve axis.

At this time, the disk 1 and the disk 2 is formed to be inclined in the longitudinal direction of the valve housing with respect to the vertical surface, respectively, to improve the watertight performance by increasing the contact area with the seat portion installed inside the valve housing when the valve is closed. .

However, the conventional integrated disk has a problem in that the operating torque required to close the valve increases because the disk 1 and the disk 2 are simultaneously in contact with the seat portions spaced apart from each other along the longitudinal direction of the valve housing when the valve is closed.

In particular, when the fluid is leaked due to the gap between the disc and the seat part when the valve is closed, a larger valve operation force is required to close the valve further.

Accordingly, an object of the present invention is to provide a gate valve capable of reducing the operating torque by differentiating the timing at which the first disc and the second disc come into contact with the seat portion by enabling the existing integral disc to operate separately. will be.

In addition, another object of the present invention is to provide a gate valve that can form an orifice on the first disk and the second disk, respectively, to improve the straightness of the flow rate through the orifice when the opening degree of the valve is low.

In addition, another object of the present invention is to provide a gate valve that can flow more flow in the same time by flowing the fluid through the orifice when opening and closing the valve, reducing the loss coefficient according to the disk resistance.

In order to achieve the object of the present invention, the gate valve according to the present invention, the valve housing having a flow path therein; A valve shaft rotatably mounted to the valve housing; A nut part screwed to the valve shaft and lifted according to the rotation of the valve shaft; An upper portion is coupled to the nut portion, and is mounted to the inside of the valve housing so as to be movable up and down, and includes a disk assembly for opening and closing the flow path of the valve housing, the disk assembly has a first nut portion receiving portion at the top And a first disc configured to receive a part of the nut part to be suspended by the first nut part accommodating part, and to be supported to be elevated. And a second nut part accommodating part at an upper part thereof, and coupled to the second nut part accommodating part to accommodate another part of the nut part so as to be movable up and down with respect to the first disc while being in contact with the first disc. It includes a second disk.

According to an example related to the present invention, the nut part may include a coupling part having a female screw part therein; A mounting part extending radially from the bottom surface of the coupling part to be caught by the first and second nut part receiving parts and accommodated in the first and second nut part receiving parts; And one side may be received and coupled to the inside of the mounting portion, the other side is in contact with the bottom surface of the first nut portion receiving portion, it may include a spring for elastically supporting the mounting portion.

According to an example related to the present invention, the spring may be eccentrically disposed inward of the first nut part accommodating part from the center of the mounting part, and may be provided in a plural number so as to be extended or extended in the vertical direction.

According to an example related to the present invention, the first coupling part accommodating groove is formed in a semicircular shape so as to surround one side of the outer circumferential surface of the coupling part on the upper part of the first nut part accommodating part, and the first nut part accommodating part is disposed between the upper part and the lower part. The gap is formed to be larger than the thickness of the mounting portion, and a portion of the mounting portion is accommodated to be movable in the vertical direction in the first nut portion receiving portion, and the other side of the outer peripheral surface of the coupling portion is placed on the upper portion of the second nut portion receiving portion. The second coupling part accommodating groove is formed to have a semicircular shape so as to surround the second nut part accommodating part, and the gap between the upper part and the lower part is formed to correspond to the thickness of the mounting part, so that the upper part and the lower part of the second nut part accommodating part Can be in contact with the top and bottom of the mounting portion.

According to an example related to the present invention, the first disk has a plurality of first orifices therein, the second disk has a plurality of second orifices therein, and the first disk or the second disk The plurality of first orifices and the plurality of second orifices are disposed to coincide with each other when spaced from the seat portion provided in the flow path of the valve housing, and the plurality of first or second disks contact the seat portion with each other. The first orifice and the plurality of second orifices may be arranged to be inconsistent with each other.

According to an example related to the present invention, the first disk may include a first contact surface unit including the plurality of first orifices; And a first outer peripheral portion extending from the outer portion of the first contact surface portion to protrude in the thickness direction of the first contact surface portion, wherein the second disk includes the plurality of second orifices, A second contact surface portion contacted; And a second outer peripheral portion extending from the outer portion of the second contact surface portion to protrude in the thickness direction of the first contact surface portion, wherein the plurality of first orifices and the plurality of second orifices are formed on the first and second contact surface portions. The first orifice and the second orifice may be selectively matched as the second contact surface is moved up and down with respect to the first contact surface by being alternately formed in the thickness direction with a height difference from each other along an up and down direction. have.

According to an example related to the present invention, the first disk further includes a plurality of first blades protruding laterally from both left and right sides of the first outer circumferential portion, and the second disk includes left and right sides of the second outer circumference portion. Further comprising a plurality of second blades protruding in the lateral direction, wherein the disk assembly, one side is fastened to the first wing or the second wing, the front portion and the rear portion is the front of the first wing portion And a wing engaging portion contacting a rear surface of the second wing portion to restrict movement of the first wing portion and the second wing portion in the front-rear direction and to allow the first and second wing portions to move in the vertical direction. It may include.

According to an example related to the present invention, the disk assembly is provided on the inner surface of the first contact surface portion or the second contact surface portion, a plurality of intermediate plates are provided, the plurality of intermediate plates each of the plurality of intermediate plates A plurality of third orifices may be formed to correspond to one orifice or the plurality of second orifices.

According to an example related to the present invention, the first nut part accommodating part provided on the upper portion of the first disk extends higher than the second nut part accommodating part provided on the second disk, Each of the plurality of first orifices may be higher than the height difference between the first nut part accommodating part and the second nut part accommodating part with respect to each of the plurality of second orifices.

According to another example related to the present invention, the disc assembly may include a nut part including a coupling part which opens and closes a flow path inside the valve housing, and includes a coupling part having a female screw part therein and a radially protruding portion from the bottom of the coupling part; A first disk having a first nut part accommodating part at an upper part thereof and accommodating one side of the mounting part to the first nut part accommodating part so as to be movable up and down; And a second nut part accommodating part at an upper part thereof, the second nut part accommodating part accommodates the other side of the mounting part, and is mounted to be movable upward and downward with respect to the first disc while being in contact with the first disc. 2 discs; And one side is received and coupled inside one side of the mounting portion, the other side is in contact with the bottom surface of the first nut portion receiving portion, the mounting portion elastically presses the upper portion of the first nut portion receiving portion to the second disk It may include a spring elastically supported to raise relative to one disk.

According to the present invention configured as described above, it has the following effects.

First, since the first disk and the second disk are in contact with each other in a different order, the operating torque of the valve can be significantly reduced.

Secondly, when the valve shaft is closed and the valve shaft receives power from the outside and rotates counterclockwise, the nut portion is lowered along the valve shaft, and the disk assembly accommodated inside the extension portion of the bonnet and the valve body is lowered by the nut portion. do.

At this time, the second disk is raised by a predetermined height than the first disk by the elastic force of the spring, the first disk and the second disk is lowered together, the plurality of first orifices and the plurality of second orifices are arranged to match each other It can improve the stability of the pipeline by reducing the occurrence of vortex by improving the straightness of the flow rate through the orifice at the low opening (opening degree) of the valve while moving into the flow path.

Third, the resistance of the disk may be reduced when opening and closing the first and second disks, and the flow rate may be reduced through the orifice to reduce the loss factor according to the resistance of the disk, thereby transporting more flow rate at the same time.

Fourth, when the disk assembly is lowered, the first disk first contacts the first seat portion disposed on the left side of the seat portion first, and then the second disk is secondarily mounted on the right side of the seat portion while the spring is compressed by the lowering of the nut portion. By contacting the second seat portion to be disposed, the valve is completely closed and the leak is blocked.

1 is a perspective view showing the appearance of a gate valve according to the present invention.
FIG. 2 is a cross-sectional view taken along II-II in FIG. 1.
3 is a side view of the disk assembly in FIG. 2.
4 is an exploded perspective view of the disk assembly in FIG. 3.
5 is a cross-sectional view illustrating a fully open state of the disk assembly in FIG. 2.
FIG. 6 is a conceptual view illustrating a first closed state of a first disk when the disk assembly is lowered in FIG. 5.
7 is a combined perspective view of the disk assembly in FIG. 4.
FIG. 8 is a conceptual view illustrating an inner side surface of a first disk after removing the second disk from the disk assembly of FIG. 7.
9 is a side view of the disk assembly in FIG. 6.
10 is a cross-sectional view taken along XX in FIG. 3.
FIG. 11 is a cross-sectional view taken along XI-XI in FIG. 9.

EMBODIMENT OF THE INVENTION Hereinafter, the gate valve which concerns on this invention is demonstrated in detail with reference to drawings. Singular expressions include plural expressions unless the context clearly indicates otherwise.

In the following description of the embodiments disclosed herein, if it is determined that the detailed description of the related known technology may obscure the gist of the embodiments disclosed herein, the detailed description thereof will be omitted.

1 is a perspective view showing the appearance of a gate valve according to the present invention, FIG. 2 is a cross-sectional view taken along II-II in FIG. 1, FIG. 3 is a side view of the disk assembly 20 in FIG. 2, and FIG. 4 is FIG. 3 is an exploded perspective view of the disk assembly 20.

FIG. 5 is a cross-sectional view illustrating a fully open state of the disc assembly in FIG. 2, and FIG. 6 is a conceptual view illustrating a first closed state of the first disc when the disc assembly is lowered in FIG. 5. FIG. 7 is a perspective view of the disk assembly in FIG. 4, and FIG. 8 is a conceptual view illustrating an inner side surface of the first disk after removing the second disk from the disk assembly of FIG. 7.

FIG. 9 is a side view of the disk assembly in FIG. 6, FIG. 10 is a sectional view taken along X-X in FIG. 3, and FIG. 11 is a sectional view taken along XI-XI in FIG. 9.

The gate valve includes a valve housing 1, a valve shaft 18, and a disk assembly 20.

The valve housing 1 forms the appearance of the gate valve. The valve housing 1 may include a valve body 10 disposed at a lower portion thereof and a bonnet 16 disposed at an upper portion thereof so as to cover an upper portion of the valve body 10.

The valve body 10 extends upward from a middle portion between the front end portion and the rear end portion along the longitudinal direction of the flow passage portion 11 and the flow passage portion 11 forming the flow passage 12 so that fluid flows therein. And an extension 14 to be provided.

Flange portions may be formed on both sides of the flow path portion 11, inlets may be formed on the flange portion of one side, and outlets may be formed on the flange portion of the other side. A plurality of fastening holes may be spaced apart along the circumferential direction of the flange portion, and each flange portion may be fastened with another pipe by a bolt (not shown) through the plurality of fastening holes.

The extension part 14 has a space in which the disk assembly 20 can move up and down. The front and rear surfaces of the extension part 14 along the flow direction of the fluid may be configured in a plane.

The guide part 15 extends upward and downward on both sides of the extension part 14 and the flow path part 11, and both wing parts 214 and 224 of the disk are slidably coupled up and down inside the guide part 15. Can be.

A first flange portion is formed along an upper edge of the extension portion 14, a second flange portion is formed to face the first flange portion along a lower edge of the bonnet 16, and a plurality of first flange portions are formed on each of the first and second flange portions. The fastening holes are spaced apart from each other, and the bonnet 16 and the valve body 10 may be fastened through the plurality of fastening holes with the plurality of bolts 161.

The support part 17 is provided in the center of the upper end part of the bonnet 16 for rotatably supporting the valve shaft 18.

The valve shaft 18 extends in the vertical direction and may be disposed perpendicularly to the inside of the bonnet 16 and the valve body 10 through the support 17. A bearing is installed inside the support 17, and the bearing is disposed between the support 17 and the valve shaft 18 so as to surround the upper portion of the valve shaft 18 to rotatably support the valve shaft 18. have.

The bearing cover 171 may be installed at the upper end of the support 17 to cover the upper portion of the support 17, and the bearing cover 171 may be fastened to the support 17 by a plurality of bolts 172. The upper end of the valve shaft 18 may be combined with the bearing cover 171 to pass through the bearing cover 171.

The upper end of the valve shaft 18 may protrude upward from the bonnet 16, and a connector 181 for connection with an external driving means may be coupled to the upper end of the valve shaft 18. The connector 181 may be formed in a rectangular shape to transmit rotational force from the driving means to the valve shaft 18.

The male screw portion is formed spirally in the longitudinal direction on the valve shaft 18, and the nut portion 19 is screwed to the male screw portion, so that the nut portion 19 can be elevated in accordance with the rotational direction of the valve shaft 18. Can be.

The nut part 19 may include a coupling part 191 having an internal thread formed on an inner side thereof, and a mounting part 192 having a small height and a large area in a square shape at the bottom of the coupling part 191.

The coupling part 191 is formed in a cylindrical shape, and the mounting part 192 may be configured in a quadrangular shape to prevent the nut part 19 from being rotated. A through hole may be formed in the mounting portion 192 to allow the valve shaft 18 to pass therethrough, and a female screw portion may be formed in the through hole.

The disk assembly 20 is provided inside the valve housing 1 to open and close the flow passage 12.

The disk assembly 20 is mounted to the inside of the valve housing 1 to be movable in the vertical direction, and can open and close the flow path 12 of the valve housing 1.

The flow path portion 11 of the valve housing 1 is provided with a seat portion 13. When the disc assembly 20 descends, the seat portion 13 comes into contact with the seat portion 13, closes the flow path 12, and the disc assembly 20 rises. The flow path 12 may be opened by being spaced apart from the seat portion 13.

The sheet portion 13 may include a first sheet portion 131 disposed to be in contact with the first disk 21 to be described later, and a second sheet portion 132 disposed to be in contact with the second disk 22. Can be. The first sheet portion 131 and the second sheet portion 132 are formed to correspond to the first sheet contact portion 213 of the first disk 21 and the second sheet contact portion 223 of the second disk 22, respectively. Can be.

The disc assembly 20 may include a first disc 21, a second disc 22, nut part accommodating parts 215 and 225, and an intermediate plate 216.

Each of the first disk 21 and the second disk 22 is formed in a circular shape and mounted in the valve housing 1 so as to be relatively movable in the vertical direction while being in contact with each other in the longitudinal direction of the flow path portion 11. Can be.

Each of the first disk 21 and the second disk 22 includes contact surface portions 211 and 221, outer peripheral portions 212 and 222, sheet contact portions 213 and 223, and wing portions 214 and 224.

The first disk 21 and the second disk 22 are symmetrically disposed in contact with each other based on a vertical center line that crosses the flow path portion 11 in the vertical direction, and the first disk 21 and the second disk 22 are in contact with each other. The configuration of 22 is the same or similar to each other, so duplicate description thereof will be omitted.

For convenience of description, when the contact surface portions 211 and 221 are commonly provided in the first disk 21 and the second disk 22, the contact surface portion 211 provided in the first disk 21 may be the first. The contact surface portion 211 may be referred to, and the contact surface portion 221 provided on the second disk 22 may be referred to as a second contact surface portion 221. As described above, 'first' and 'second' may be distinguished from the common elements of the first and second discs 21 and 22 by attaching them to the front end of the common elements.

The contact surface portions 211 and 221 are formed in a circular shape and extend in a direction crossing the flow path 12. For example, the contact surface portions 211 and 221 may extend in the vertical direction. The contact surface parts 211 and 221 may be disposed to be movable up and down between the extension part 14 and the flow path part 11. The first contact surface portion 211 and the second contact surface portion 221 may be configured to be in contact with each other.

Shaft receiving portions 2111 and 2211 may be formed on inner surfaces of the contact surface portions 211 and 221 to accommodate the valve shaft 18. The shaft receiving parts 2111 and 2211 may extend in the vertical direction to the contact surface parts 211 and 221. The shaft accommodating parts 2111 and 2211 may be formed in a semicircular shape to accommodate a portion of the valve shaft 18.

For example, the first shaft receiving portion 2111 of the first contact surface portion 211 surrounds the left outer peripheral surface along the circumferential direction of the valve shaft 18 and the second shaft receiving portion 2211 of the second contact surface portion 221. ) May be configured to surround the right outer circumferential surface along the circumferential direction of the valve shaft 18.

The shaft receiving parts 2111 and 2211 may be formed to protrude in the longitudinal direction of the flow path part 11 from the outer surfaces of the contact surface parts 211 and 221.

The ribs 2112 may protrude in the longitudinal direction of the flow path part 11 and intersect the shaft receiving parts 2111 and 2211 in the vertical direction on the outer surfaces of the contact surface parts 211 and 221.

The outer peripheral parts 212 and 222 may be formed to extend in the longitudinal direction of the flow path part 11 at the outer ends of the contact surface parts 211 and 221. The outer circumferential portions 212 and 222 may be formed along the circumferential direction of the contact surface portions 211 and 221. The outer circumferential portions 212 and 222 may be formed such that an extension length in the axial direction becomes shorter from the upper end to the lower end. One end of the outer peripheral portion (212, 222) may be formed to be inclined in the longitudinal direction with respect to the vertical line.

The seat contact parts 213 and 223 may be formed to extend radially from the outer portion of the outer circumference parts 212 and 222 so as to be in contact with the seat part 13 when the valve is closed. The sheet contact portions 213 and 223 may be formed along the circumferential direction of the outer circumference portions 212 and 222. The sheet contact parts 213 and 223 may be formed to be inclined in the longitudinal direction with respect to the vertical line.

The plurality of wings 214 and 224 may be disposed to face each other along the radial direction on left and right sides of the outer circumference 212 and 222, and may protrude laterally from the outer circumference of the outer circumference 212 and 222.

The wing parts 214 and 224 may be coupled to be received in the guide part 15 so as to be movable up and down along the guide part 15 of the valve housing 1.

The first wing portions 214 provided on both sides of the first disk 21 are in contact with the second wing portions 224 provided on both sides of the second disk 22 facing each other by the wing coupling portion 217. And slidably coupled to each other.

The wing coupling portion 217 may have a “c” shaped cross-sectional shape and may be fastened to the wing portions 214 and 224 of the first disk 21 or the second disk 22. In the present embodiment, the wing coupling portion 217 is fastened to the first blade portion 214 of the first disk 21.

The wing coupling portions 217 may be disposed to surround two wing portions 214 and 224 which are stacked on both sides facing each other in the thickness direction, such that the two wing portions 214 and 224 may move relative to each other in the vertical direction.

An open portion of the “c” shaped wing engaging portion 217 may be disposed to face the wing portions 214 and 224 so that the wing portions 214 and 224 may be accommodated through the opening portion of the wing coupling portion 217. In addition, the upper and lower portions of the wing coupling portion 217 are opened in the vertical direction, and the first wing portion 214 and the second wing portion 224 are in contact with each other inside the wing coupling portion 217 in the vertical direction Relative movement is possible.

Both sides of the “c” shaped wing engaging portion 217 facing each other may prevent the wing portions 214 and 224 from moving forward and backward along the longitudinal direction of the flow path portion 11.

The wings 214 and 224 may be formed to be symmetrically inclined at the top and the bottom thereof. A plurality of screw holes may be formed at ends of the wing parts 214 and 224, and the plurality of screw holes may be spaced apart in the vertical direction.

The wing coupling portion 217 is made of a material having excellent sliding and abrasion resistance, thereby reducing the occurrence of friction and wear due to the contact between the wing coupling portion 217 and the guide portion 15. For example, the wing coupling portion 217 may be made of a material such as CAC406 (bronze tin alloyed copper or brass alloyed with copper lead) or PTFE (Teflon), HDPE (High-density polyethylene). have.

According to the configuration of the wing coupling portion 217, when the wing coupling portion 217 moves up and down with respect to the guide portion 15 in contact with the guide portion 15, the friction can be reduced, the valve when opening and closing the valve The operating torque for rotating the shaft 18 can be significantly reduced.

The intermediate plate 216 may be disposed between the first disk 21 and the second disk 22 to reduce friction due to contact between the first contact surface portion 211 and the second contact surface portion 221.

The intermediate plate 216 may be installed on at least one of the contact surface portions 211 and 221 of the first contact surface portion 211 of the first disk 21 and the second contact surface portion 221 of the second disk 22. In this embodiment, the intermediate plate 216 is mounted inside the first contact surface 211 of the first disk 21.

Mounting grooves for mounting the intermediate plate 216 may be formed on the contact surfaces 211 and 221 of the first disk 21. The intermediate plate 216 may have a thickness greater than that of the mounting groove of the first contact surface portion 211, and may slightly protrude in the thickness direction from the inner surface of the first contact surface portion 211.

Since the intermediate plate 216 protrudes from the first contact surface portion 211, the first contact surface portion 211 and the second contact surface portion 221 do not contact each other, but the intermediate plate 216 and the second contact surface portion 221 are not in contact with each other. Are in contact with each other, and as the contact area between the first contact surface portion 211 and the second contact surface portion 221 decreases, friction between the two contact surface portions 211 and 221 may be reduced.

The intermediate plate 216 may be spaced apart from both left and right sides of the contact surface portions 211 and 221 with the first shaft receiving portion 2111 interposed therebetween.

The intermediate plate 216 may include a plurality of third orifices 2161. The plurality of third orifices 2221 may be disposed to correspond to the plurality of first orifices 2113 or the plurality of second orifices 2213. In the present embodiment, the plurality of third orifices 2161 are arranged to correspond to the plurality of first orifices 2113.

The intermediate plate 216 is made of a material having excellent sliding and abrasion resistance, thereby reducing the occurrence of friction and wear due to the contact of the first and second disks 21 and 22. For example, the intermediate plate 216 may be made of a material such as CAC406 (copper tin alloyed bronze or copper leaded brass) or PTFE (Teflon), HDPE (High Density Polyethylene). .

According to the configuration of the intermediate plate 216, the friction can be reduced when the first disk 21 and the second disk 22 are moved relative to each other in the vertical direction, and the valve shaft 18 is rotated when the valve is opened and closed. The operating torque for making it can be significantly reduced.

Each of the first disk 21 and the second disk 22 may be supported by the nut unit 19 to be lifted and lowered while being suspended from the mounting unit 192 of the nut unit 19.

To this end, nut receiving portions 215 and 225 may be provided on the outer peripheral portions 212 and 222 of the disk. The nut part accommodating parts 215 and 225 protrude upward from the outer part 212 and 222 of the first disc 21. The nut part accommodating parts 215 and 225 protrude from the upper part of the outer part 212 and 222 of the second disc 22. It may be composed of a second nut portion receiving portion 225 protruding upward.

The nut accommodating parts 215 and 225 may have a cross-sectional shape of a “c” shape. The clogged portions of the “c” shaped nut portion receiving portions 215 and 225 are disposed adjacent to the seat contact portions 213 and 223, and the open portions of the nut portion receiving portions 215 and 225 face the nut portion receiving portions 215 and 225 of the mating disks facing each other. It may be arranged to face the open portion of the).

The upper part and the lower part of the first nut part accommodating part 215 may be configured to limit the distance that the mounting part 192 moves along the vertical direction while the mounting part 192 is accommodated in the nut part accommodating parts 215 and 225. have.

A semi-circular first coupling part accommodating groove 2151 may be formed on the upper portion of the first nut part accommodating part 215 to surround one side of the outer circumferential surface of the coupling part 191 of the nut part 19.

A semi-circular first shaft accommodating groove is formed under the first nut part accommodating part 215 so as to surround one side of the outer circumferential surface of the valve shaft 18 so that the first shaft accommodating groove is connected to the first shaft accommodating part 2111. Can be communicated.

A semi-circular first coupling part accommodating groove 2251 may be formed on the upper portion of the second nut part accommodating part 225 to surround the other side of the outer circumferential surface of the coupling part 191 of the nut part 19.

A semi-circular second shaft accommodating groove is formed under the second nut accommodating portion 225 so as to surround the other side of the outer circumferential surface of the valve shaft 18 so as to accommodate the second shaft accommodating portion 2211. Can be communicated.

Here, the upper portion of the first nut portion receiving portion 215 extends higher than the second nut portion receiving portion 225 in the upward direction, so that the mounting portion 192 of the nut portion 19 is the first nut portion receiving portion ( 215 is movable in the vertical direction within a predetermined distance range in the state accommodated inside.

The upper part and the lower part of the second nut part accommodating part 225 are spaced vertically to correspond to the thickness (height) of the mounting part 192 of the nut part 19, and a part of the mounting part 192 of the nut part 19 is located. Is inserted into and coupled to the second nut part accommodating part 225, so that the second disc 22 may move upward and downward with the nut part 19.

Therefore, the second disk 22 may move relative to the first disk 21 in the vertical direction by the height difference between the first nut part accommodating part 215 and the second nut part accommodating part 225.

The nut part accommodating parts 215 and 225 may be formed to open in the left and right directions and open in the longitudinal direction of the outer circumferential parts 212 and 222.

A plurality of spring receiving grooves 1921 may be formed in the mounting portion 192 of the nut part 19. The plurality of spring receiving grooves 1921 may be disposed to be biased to a part of the mounting part 192 accommodated in the first nut part accommodating part 215 and may extend side by side in the vertical direction on the left and right sides.

The plurality of spring receiving grooves 1921 may be formed to extend upward from the bottom surface of the mounting portion 192 to open toward the lower portion of the first nut portion receiving portion 215.

Each of the plurality of springs 1922 is inserted into and coupled to the inside of the spring receiving groove 1921 to elastically support the mounting portion 192 of the nut part 19 so as to be movable upward and downward without shaking from side to side.

According to the configuration of the spring 1922, when the first disk 21 and the second disk 22 is raised or lowered by the nut portion 19, the spring 1922 is the mounting portion of the nut portion 19 by the elastic force ( By elastically pressing the 192 upwardly, it is possible to maintain the state in which the second disc 22 is raised by the height difference between the first and second nut part accommodating parts 215 and 225 with respect to the first disc 21.

The plurality of orifices 2113 and 2213 may be penetrated in the thickness direction through the contact surface portions 211 and 221 divided into quarters by the ribs 2112 and the shaft receiving portions 2111 and 2211, respectively.

The plurality of first orifices 2113 formed on the first contact surface portion 211 of the first disk 21 may correspond to the plurality of second orifices 2213 formed on the second contact surface portions 221 of the second disk 22. The contact surfaces 211 and 221 may be alternately formed in the thickness direction.

When the valve is completely closed, the first orifice 2113 when both the first disk 21 and the second disk 22 are disposed to be in contact with the seat portion 13 and completely overlap each other along the longitudinal direction of the flow path portion 11. ) And the second orifice 2213 may be disposed to be offset from each other in the thickness direction along the vertical direction.

For example, each of the plurality of first orifices 2113 spaced apart from each other in the vertical direction on the first contact surface portion 211 may include a plurality of second orifices spaced apart in the vertical direction on the second contact surface portion 221. 2213 may be arranged in a zigzag form while being alternated with each other along the thickness direction of each of the contact surfaces 211 and 221 and alternately along the vertical direction.

In this case, each of the plurality of first orifices 2113 may be spaced apart in an upward direction at intervals corresponding to the height difference between the first and second nut part accommodating parts 215 and 225 with respect to each of the plurality of second orifices 2213. Can be.

When the second disc 22 or both the first and second discs 21 and 22 are spaced apart from the seat portion 13 when the valve is opened or closed, the second disc 22 is subjected to the elastic force of the spring 1922. The first orifice 2113 and the second orifice 2213 are arranged to overlap in the longitudinal direction of the flow path portion 11 or the thickness direction of the contact surface portions 211 and 221 as they rise by a predetermined height relative to the first disk 21. Thus, fluid may flow through the first and second orifices 2113 and 2213.

According to this configuration, when the valve is completely closed, the first orifice 2113 and the second orifice 2213 are shifted from each other so that the fluid is not allowed to enter or exit through the orifices 2113 and 2213, and the valve is opened, that is, the disc. When the assembly 20 is raised, the first orifice 2113 (including the third orifice 2161) and the second orifice 2213 may coincide with each other to allow the fluid to pass through the orifices 2113 and 2213.

Therefore, the operation and effect of the gate valve of the present invention will be described.

When the valve shaft 18 is rotated counterclockwise by receiving power from the outside when the valve is closed, the nut portion 19 is lowered along the valve shaft 18, the bonnet 16 and the valve body 10 of the The disk assembly 20 accommodated inside the extension 14 is lowered by the nut 19.

At this time, the second disk 22 is raised by a predetermined height than the first disk 21 by the elastic force of the spring 1922, the first disk 21 and the second disk 22 is lowered together, The plurality of first orifices 2113 and the plurality of second orifices 2213 are disposed to coincide with each other, and move through the flow path part 11, through the orifices 2113 and 2213 at a low opening (opening degree) of the valve. It is possible to improve the stability of the pipeline by improving the straightness of the flow rate to reduce the generation of vortex.

In addition, the resistance of the disk can be reduced when the first and second disks 21 and 22 are opened and closed, and the flow rate is flowed through the orifices 2113 and 2213 to reduce the loss coefficient according to the resistance of the disk, thereby reducing the loss of the disk. It can transport more flow rate.

When the disk assembly 20 descends, the first disk 21 first contacts the first sheet portion 131 disposed on the left side of the seat portion 13 first, and then the spring 1922 is the nut portion 19. As the second disk 22 comes into contact with the second seat portion 132 disposed on the right side of the seat portion 13 while being compressed by the lowering of the valve, the valve is completely closed and the leak is blocked.

According to this configuration, since the first disk 21 and the second disk 22 are in contact with the seat portion 13 in a different order, the operation torque of the valve can be significantly reduced.

On the other hand, when the valve is opened, the first and second discs 21 and 22 operate in the reverse order as when the valve is closed.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains various modifications, changes, and substitutions without departing from the essential characteristics of the present invention. will be.

In addition, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical idea of the present invention, but to describe, and the scope of the technical idea of the present invention is not limited by the embodiments and the accompanying drawings. .

The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas falling within the scope of the present invention should be construed as being included in the scope of the present invention.

1: valve housing 10; Valve body
11: Euro part 12: Euro
13 sheet portion 131 first sheet portion
132: second sheet portion 14: extension portion
15: guide portion 16: bonnet
161: bolt 17: support
171: bearing cover 172: bolt
18: valve shaft 181: connector
19: nut portion 191: coupling portion
192; Mounting part 1921: Spring receiving groove
1922: spring 20: disk assembly
21: first disk 211: first contact surface portion
2111: first shaft receiving portion 2112: rib
2113: first orifice 212: first outer peripheral
213: first sheet contact portion 214: first wing portion
215: first nut part accommodating part 2151: first coupling part accommodating groove
22: second disk 221: second contact surface portion
2211: second shaft receiving portion 2213: second orifice
222: second outer peripheral portion 223: second seat contact portion
224: second wing portion 216: intermediate plate
2161: third orifice 217: wing coupling
225: second nut part accommodating part 2251: second coupling part accommodating groove

Claims (10)

A valve housing having a flow path therein;
A valve shaft rotatably mounted to the valve housing;
A nut part screwed to the valve shaft and lifted according to the rotation of the valve shaft;
An upper portion coupled to the nut part and mounted to the inside of the valve housing so as to be movable up and down, and including a disc assembly to open and close the flow path of the valve housing,
The disk assembly,
A first disc having a first nut part accommodating part at an upper part thereof, the first disc being accommodated to be lifted and received by being coupled to the first nut part accommodating part to be suspended; And
A second nut part accommodating part at an upper part thereof, the second nut part accommodating part accommodates another part of the nut part and is coupled to the first disc so as to be movable upward and downward with respect to the first disc; 2 discs,
The nut part,
Coupling portion having a female screw portion on the inside;
A mounting part extending radially from the bottom surface of the coupling part to be caught by the first and second nut part receiving parts and accommodated in the first and second nut part receiving parts; And
One side is received and coupled to the inside of the mounting portion, the other side is in contact with the bottom surface of the first nut portion receiving portion, characterized in that it comprises a spring for elastically supporting the mounting portion. delete The method of claim 1,
And a plurality of springs eccentrically disposed in the first nut part accommodating part at a center of the mounting part, and installed in a plurality of springs so as to extend or extend in a vertical direction. The method of claim 1,
The first coupling portion receiving groove is formed in a semi-circular shape so as to surround one side of the outer circumferential surface of the coupling portion on an upper portion of the first nut portion receiving portion,
The first nut part accommodating part may have a gap between the upper part and the lower part greater than the thickness of the mounting part, and a part of the mounting part may be accommodated in the first nut part accommodating part to be movable in the vertical direction.
The second coupling portion receiving groove is formed in a semi-circular shape to surround the other side of the outer peripheral surface of the coupling portion on the upper portion of the second nut portion receiving portion,
The second nut portion receiving portion is formed so that the gap between the upper portion and the lower portion corresponding to the thickness of the mounting portion, the upper and lower portion of the second nut portion receiving portion is in contact with the upper and lower portion of the mounting portion . The method of claim 1,
The first disk has a plurality of first orifices therein,
The second disk has a plurality of second orifices therein,
When the first disk or the second disk is spaced apart from the seat portion provided in the flow path of the valve housing, the plurality of first orifices and the plurality of second orifices are arranged to match each other, the first disk and the second disk And the plurality of first orifices and the plurality of second orifices are disposed to be inconsistent with each other when contacting the seat part. The method of claim 5,
The first disk,
A first contact surface portion having the plurality of first orifices; And
A first outer peripheral portion extending from the outer portion of the first contact surface portion to protrude in a thickness direction of the first contact surface portion,
The second disk,
A second contact surface portion having the plurality of second orifices and in contact with the first contact surface portion; And
A second outer peripheral portion extending from the outer portion of the second contact surface portion to protrude in the thickness direction of the first contact surface portion,
The plurality of first orifices and the plurality of second orifices are formed to be staggered in the thickness direction with a height difference from each other along the up and down directions of the first and second contact surface portions, and the second contact surface portion is formed in the first contact surface portion. And the first orifice and the second orifice selectively coincide with each other in the vertical direction. The method of claim 6,
The first disk further includes a plurality of first wing parts protruding in the lateral direction from both left and right sides of the first outer peripheral portion,
The second disk further includes a plurality of second blades protruding laterally from both left and right sides of the second outer circumference portion,
The disk assembly,
One side is fastened to the first wing portion or the second wing portion, the front portion and the rear portion is in contact with the front surface of the first wing portion and the second wing portion of the first wing portion and the second wing portion before and after And a vane engaging portion for restricting movement in the direction and allowing the first and second blade portions to move relative in the vertical direction. The method of claim 6,
The disk assembly,
It is provided on the inner surface of the first contact surface portion or the second contact surface portion, a plurality of intermediate plates are provided, each of the plurality of intermediate plates corresponding to the plurality of first orifices or the plurality of second orifices And a third orifice is formed. The method of claim 5,
The first nut part accommodating part provided in the upper portion of the first disk extends higher in the upper direction than the second nut part accommodating part provided in the upper part of the second disk,
And each of the plurality of first orifices is disposed higher by the height difference between the first nut part accommodating part and the second nut part accommodating part with respect to each of the plurality of second orifices. In the disk assembly for opening and closing the flow path inside the valve housing,
A nut part having a coupling part having a female screw part therein and a mounting part protruding radially from the lower part of the coupling part;
A first disk having a first nut part accommodating part at an upper part thereof and accommodating one side of the mounting part to the first nut part accommodating part so as to be movable up and down; And
A second nut part accommodating part at an upper part thereof, and a second nut part accommodating part accommodating and accommodating the other side of the mounting part so as to be movable up and down with respect to the first disc while being in contact with the first disc; disk; And
One side is received and coupled inside one side of the mounting portion, the other side is in contact with the bottom surface of the first nut portion receiving portion, the mounting portion elastically presses the upper portion of the first nut portion receiving portion to the second disk to the first A gate valve comprising a spring that resiliently supports to lift relative to the disk.

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