KR20080023211A - Gate valve structure of parallel slide - Google Patents

Abstract

A structure of a parallel-slide gate valve is provided to secure airtightness of a seat ring by providing a spring member between a disk holder and first and second disks and by exerting elastic force uniformly. A structure of a parallel-slide gate valve comprises: seat rings fixed to both sides of an inner side of a valve body and a valve assembly installed between the seat rings through a stem(70). The valve assembly includes a disk holder(30) having a vertical screw groove with which the stem is engaged, first and second disks engaged closely with both surfaces of the disk holder, a spring interposed between the disk holder and the first and second disks, which compresses the first and second disks to an outer direction of the disk holder and a fixing unit including a flat surface formed to be corresponded to an outer circumference edge in an upper portion, a fixing plate having a screw hole screwed with the stem in a central portion and a bolt(68) fixing the first and second disks and the fixing plate.

Description

Balanced slide gate valve structure {GATE VALVE STRUCTURE OF PARALLEL SLIDE}

The present invention relates to a balanced slide gate valve, and in particular, a spring member is provided to be distributed between the disc holder constituting the gate valve and the first and second disks, so that the elastic force acts uniformly to secure airtightness of the seating side. It can be configured to block the external exposure of the stem for raising and lowering the valve body to prevent foreign matter from being caught or corroded.

In general, the gate valve is installed on the pipe line to quickly control the movement of the fluid. The gate valve ensures the airtightness of the valve by using the pressure of the fluid, and opens and closes the valve even with a small force. Is easy.

Among the gate valves, a balanced slide valve will be described with reference to the accompanying drawings.

1 is a cross-sectional view showing a conventional balanced slide gate valve structure, Figure 2 is an exploded perspective view of the main portion of FIG.

As shown in Figures 1 and 2, the conventional gate valve and the seat ring 100, 110 which is fixed to both sides inside the valve body 700; It consists of a valve body 200 is installed through the stem 120 between the seat ring (100, 110).

The valve body 200 includes a disk holder 210 having a threaded portion 211 so that the stem 120 can be coupled; First and second discs 220 and 230 inserted into the guide holes 212 of the disc holder 210 through the locking portions 213; It is installed in the receiving groove 231 of the first and second disks 220 and 230 and constitutes a coil spring 240 that presses the first and second disks 220 and 230 to the outer side of the disk holder 210. do.

The bracket 250 is formed on the upper side of the disk holder 210 and the locking groove 251 is formed to control the position movement of the first and second disks 220 and 230 while the stem 120 is coupled and penetrated. Is installed.

The center of the bracket 250 forms a threaded portion 252 corresponding to the threaded portion 121 of the stem 120, the locking groove 251 is formed on both sides of the bracket 250, the disk holder 210 The pinhole 215 is formed to be perpendicular to the threaded portion 211 of the pin is to be coupled to the pin 260 to fix the stem 120 to the disk holder (210).

The pinhole 215 of the disk holder 210 is selectively opposed to the pinhole 125 of the stem 120.

On the other hand, the adjustment screw 400 is fixed to the lower portion of the handle 300 for elevating the stem 120 in the upper portion of the stem 120 is screwed to the feed screw portion 122 of the stem to raise and lower the stem do.

The adjustment screw 400 is screwed to the transfer screw portion 122 of the stem is in close contact with the upper body 500 which is fixed to the upper portion of the valve body 700.

Referring to the operation state of the conventional gate valve configured as described above, when the handle is rotated forward, the handle is rotated forward (clockwise), accordingly the adjustment screw 400 fixed to the lower region of the handle 300 is a stem ( In the state coupled to the feed screw portion 122 of the 120 is forward rotation along the feed screw portion 122 is to move the stem 120 upward along the adjustment screw (400).

At the same time, the valve body 200 which is fastened to the lower part of the stem 120 and composed of the disk holder 210, the first and second disks 220 and 230, and the coil spring 240 is moved upward, and is seated. The fluid flows through the pipes 600 and 610 on both sides by moving away from the rings 100 and 110.

On the contrary, when the handle is rotated in reverse, the handle is rotated in reverse (counterclockwise), and thus, the adjusting screw 400 fixed to the lower portion of the handle 300 has the feed screw 122 of the stem 120. The stem 120 moves downward along the adjustment screw 400 as it is rotated along the feed screw 122 in the fastened state.

At the same time, the valve body 200 which is fastened to the bottom of the stem 120 and composed of the disc holder 210, the first and second discs 220 and 230, and the coil spring 240 is moved downward to seat the ring 100. By being in close contact between the (110) to block the flow of fluid between the pipe (600, 610) on both sides.

However, since the coil spring for maintaining the air tightness to the valve body constituting the conventional gate valve is interposed in the center region of the first and second disks, the elastic force action does not work uniformly, and the coil spring itself is twisted. There was a problem that it is difficult to secure the airtight side of the seating. In addition, the stem for raising and lowering the valve element, which is the main component of the gate valve, is made of a metal material itself and is exposed to the outside, thereby causing foreign substances to be caught or corrosion, thereby degrading the performance of the product and improving its life. Various problems such as shortening have occurred.

The present invention has been made in order to solve such a conventional problem, the present invention is provided with a spring member to be distributed between the disk holder and the first and second disk, the elastic force acts uniformly to ensure the airtight side of the seating Its purpose is to provide a balanced slide gate valve structure.

Another object is to improve the quality of the product by preventing the foreign matter to be caught or corrosion on the stem by preventing the stem exposed to the outside to raise and lower the valve body.

Technical problem of the present invention configured as described above, the valve body provided as a stem between the seat ring is fixed inside the valve body; A transfer nut seated on an upper portion of the upper body fixed to the upper portion of the valve body and to which the transfer screw portion of the stem is coupled; A valve fixed to an upper portion of a transfer nut and formed of a handle protruding a stem to a central area, the valve body comprising: a disk holder having a vertical screw groove formed to allow the stem to be coupled; First and second disks coupled in close contact with both surfaces of the disk holder; A spring member interposed between the disc holder and the first and second discs to press the first and second discs in an outward direction of the disc holder; A flat surface formed on the first and second disks and corresponding to an outer circumference thereof; It is fastened by a fastening force of the fastening bolt to the flat surface, characterized in that the central region comprises a fixing means consisting of a fixing plate for screwing the stem.

The present invention is provided with a spring member to be distributed between the first and second disks constituting the gate valve is provided with the effect that the elastic force acts uniformly to stabilize the airtightness of the seating side, and also the valve body It provides the effect of improving the quality of the product by blocking external exposure of the stem for raising and lowering to prevent foreign matter from being caught or corroded.

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

3 is a cross-sectional view illustrating a balanced slide gate valve structure according to the present invention, FIG. 4A is an enlarged view of portion “A” of FIG. 3, and 4B is an enlarged view of portion “B” of FIG. 3. 5 is a perspective view showing the overall structure of the balanced slide gate valve structure according to the present invention, Figure 6 is an exploded perspective view of the main portion of FIG.

As shown in Figs. 1 to 6, the balanced slide gate valve according to the present invention includes: seat rings 10 and 11 fixed to both sides of the valve body 1; The valve body 20 is installed between the seat rings 10 and 11 through the stem 70.

The valve body 20 is composed of a disk holder 30, the first and second disks 40 and 41, the spring member 50 and the fixing means (A), and is lowered by the stem 70 to seat Sealing of the sides of the rings 10, 11 is achieved.

The disk holder 30 has a vertical screw groove 32 is formed so that the stem 70 can be coupled, a plurality of horizontal guide hole 34 is formed through the central region, the outer side of the horizontal guide hole 34 The fitting groove 36 is formed to correspond to.

The first and second disks 40 and 41 protrude from the fitting protrusions 43 to be fitted into the fitting grooves 36 of the disc holder 30 so as to correspond to the horizontal guide holes 32. 45 is formed to be in close contact with both sides of the disk holder (30).

The spring member 50 passes through the horizontal guide hole 34 of the disc holder 30 in close contact with each other, and both ends of the spring member 50 are interposed in the insertion groove 45 of the first and second discs 40 and 41. 2 consists of a plurality of coil springs 52 for pressing the discs 40 and 41 in the outward direction of the disc holder 30.

The fixing means (A) is formed to correspond to the upper outer periphery of the first and second disks (40, 41), the flat surface (60) is formed with a screw groove (60a); A fixing plate 66 in which a screw hole 66a is formed to correspond to the screw groove 60a of the flat surface 60, and a fastening hole 74 in which a stem 70 is screwed is formed in a central region thereof; Fastening bolts fastened through the screw holes 66a of the fixing plate 66 and the screw grooves 60a of the flat surface 60 to fix the first and second disks 40 and 41 and the fixing plate 66 ( 68).

The stem 70 passes vertically through the fastening hole 64 of the fixing plate 66, and a screw portion 72 which is vertically fastened to the vertical screw groove 32 of the disc holder 30 is formed in the lower region. In the upper region, a feed screw portion 74 is formed, and a vertical indicator 76 for checking the scale is fixed at the top.

On the other hand, the upper body 3 is fastened and fixed to the upper portion of the valve body 1, the transfer nut 80 to which the transfer screw portion 74 of the stem 70 is fastened to the upper portion of the upper body 3, The handle 5 is fixed on the transfer nut 80. At this time, the top of the stem 70 is positioned to protrude upward through the central area of the handle 5.

In addition, the upper cover 90 is fastened and fixed by maintaining a vertical position in the center of the handle 5, and a vertical long hole 90a is formed in the upper cover 90, and a graduation mark is vertically formed on an outer circumferential surface of the vertical long hole 90a. 92 is provided to determine the opening and closing state of the gate valve as the vertical indicator 76 fixed to the upper and lower movement system 70 of the stem 70 is located on the scale of the graduation display 92. At this time, the vertical long hole (90a) is formed from the lower end of the upper cover 90 to the upper region.

In addition, a lower cover 95 is fastened and fixed to upper and lower portions of the upper body 3 to block the exposure of the stem 70. The lower cover 95 is made of metal or synthetic resin, and made of a cylindrical shape, but preferably made of a rubber material made of bellows type.

Looking at the assembly state of the valve body constituting the gate valve of the present invention configured as described above, as shown in Figures 3 to 6 to form a spring member 50 through the horizontal guide hole 34 of the disk holder 30 After inserting the coil springs 52, respectively, the fitting protrusions 43 of the first and second disks 40 and 41 are inserted into the fitting grooves 36 on the outside of the disk holder 30.

Then, the fitting protrusions 43 of the first and second disks 40 and 41 are inserted into the fitting grooves 36 on the outer side of the disk holder 30 so that the first and second disks 40 are formed on both sides of the disk holder 30. At the same time, the center region of the coil spring 52 is held in close contact with the horizontal guide hole 34, and both ends of the coil spring 52 are inserted into the first and second disks 40 and 41. The first and second disks 40 and 41 are interposed in the groove 45 to press the outer side of the disk holder 30.

In this state, when the horizontal plate 66 is seated on the flat surface 60 of the upper outer circumference of the first and second discs 40 and 41, the screw groove 60a and the horizontal plate 66 of the flat surface 60 are fixed. The screw hole 66a of the coincides with each other, and the fastening hole 74 of the horizontal plate 66 and the vertical screw groove 32 of the disc holder 30 coincide with each other.

Next, the fastening bolt 68 is fastened through the fastening hole 74 of the horizontal plate 66 and the vertical screw groove 32 of the disc holder 30, and then the fastening hole 74 of the horizontal plate 66. When the screw portion 72 of the stem 70 is fastened through the vertical screw groove 32 of the disc holder 30, the assembly of the valve body 20 is completed.

Thus, the valve body 20 is installed between the seat rings 10 and 11 which fix the assembled valve body 20 to both sides inside the valve body 1.

On the other hand, when the operating state of the valve body 20 as shown in Figs. 7a and 7b, when the handle 5 is rotated forward, the handle is rotated forward (clockwise), and thus the lower region of the handle 5 The transfer nut 80 fixed to the main shaft rotates forward along the transfer screw portion 78 of the stem 70 so that the stem 70 moves upward along the transfer nut 80.

At the same time, the valve body 20 composed of the disk holder 30, the first and second disks 40 and 41, the spring member 50 and the fixing means fastened to the stem 70 is moved upward. By exiting between the seat rings 10 and 11, fluid flows through the pipes 98 and 99 on both sides.

On the contrary, when the handle is rotated in reverse, the handle is rotated in the reverse direction (counterclockwise). Accordingly, the transfer nut 80 in the lower region of the handle 5 reversely rotates the feed screw portion 74 of the stem 70. As the stem 70 is moved downward along the transfer nut (80).

At the same time, it is fastened to the lower part of the stem 70, the valve body 20 consisting of the disk holder 30, the first and second disks 40 and 41, the coil spring 50 and the fixing means is moved downwards The close contact between the rings 10 and 11 blocks the fluid flow between the pipes on both sides.

Meanwhile, the vertical indicator 76 at the top of the stem 70 moves upward and downward by the rotation of the handle 5, and the vertical indicator 76 is located at the center of the handle 5. The user is able to identify the opening and closing of the valve by moving up and down along the inside of the upper cover 90 and looking at a portion located in the graduation display unit 76 provided on the outer circumferential surface of the vertical long hole 90a of the upper cover 90.

That is, when the vertical indicator 76 is positioned at the 0 scale at the bottom of the scale display unit 76, the vertical indicator 76 is in a closed state.

And, the upper and lower parts of the upper body 3 is made of bellows type to block the exposure of the stem 70, the lower cover 95 made of a rubber material is fastened and secured to protect the stem 70.

1 is a cross-sectional view showing a conventional balanced slide gate valve structure.

Figure 2 is an exploded perspective view of the main portion of Figure 1;

3 is a cross-sectional view showing a balanced slide gate valve structure according to the present invention.

4A is an enlarged view of portion “A” of FIG. 3, and 4B is an enlarged view of portion “B” of FIG. 3.

5 is a perspective view showing the overall structure of the balanced slide gate valve structure according to the present invention.

6 is an exploded perspective view of the main portion of FIG. 5;

7A and 7B are cross-sectional views of an operating state of a balanced slide gate valve structure according to the present invention.

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

1: valve body 3: upper body

5 handle 20 valve body

30: disc holder 32: horizontal guide hole

36: fitting groove 40,41: 1st, 2nd disc

43: fitting protrusion 45: insertion groove

50: spring member 60: flat surface

66: fixing plate 66a: screw hole

68: fastening bolt 70: stem

76: vertical indicator 90: top cover

90a: vertical hole 92: scale display unit

95: lower cover A: fixing means

Claims (5)

A valve body provided as a stem between seat rings fixed inside the valve body; A transfer nut seated on an upper portion of the upper body fixed to the upper portion of the valve body and to which the transfer screw portion of the stem is coupled; In the valve fixed to the top of the transfer nut, consisting of a handle protruding the stem to the central area, The valve body, A disc holder having a vertical screw groove formed to allow the stem to be coupled thereto; First and second disks coupled in close contact with both surfaces of the disk holder; A spring member interposed between the disc holder and the first and second discs to press the first and second discs in an outward direction of the disc holder; And A flat surface formed on the first disk and the second disk to correspond to an outer circumference; Fastening means fastened to the flat surface by a fastening force of a fastening bolt, and having a screw hole in a central region in which a screw hole for screwing the stem is formed; Balanced slide gate valve structure comprising a. According to claim 1, The disc holder is fitted grooves corresponding to both sides, The first and second disks are balanced slide gate valve structure, characterized in that the fitting projection is inserted into the fitting groove of the disk holder to protrude so as to be in close contact with both sides of the disk holder. The disk holder of claim 1 or 2, wherein the disc holder comprises: A plurality of horizontal guide holes are formed through the central area inside the fitting groove, The first and second disks have insertion grooves formed to correspond to the horizontal guide holes so that both ends of the spring member are interposed in the insertion grooves, and the central region is in close contact with the horizontal guide holes to have a uniform compressive force. Balanced slide gate valve structure. According to claim 1, wherein the upper cover is provided perpendicular to the central area of the handle, The upper cover is formed with a vertical hole vertically, Balanced sliding gate valve structure, characterized in that the vertical hole is provided on the outer circumferential surface of the vertical hole to identify the opening and closing position of the valve when the vertical indicator of the upper and lower sides of the stem is located. The balanced slide gate valve structure as claimed in claim 1 or 4, wherein a lower cover having a self-elasticity is fastened and fixed to upper and lower portions of the upper body to block the exposure of the stem.

Images