KR101986941B1 - Gate valve with bonnet replacement structure and bonnet replacement method of the same - Google Patents

Abstract

The present invention relates to a gate valve with a bonnet replacement structure, capable of replacing a bonnet without blocking an object to be transferred, and a bonnet replacement method thereof. According to the present invention, the bonnet replacement method comprises: a first step of separating a bonnet fixing flange and separating a valve cap from a bonnet part; a second step of coupling a sealing device to a support flange; a third step of installing a bonnet replacement device; a fourth step of withdrawing the bonnet part from the housing body; a fifth step of closing the closing housing of the sealing device; a sixth step of separating the bonnet replacement device; a seventh step of separating the withdrawn bonnet part and fixing other bonnet parts; an eighth step of opening the sealing housing; a ninth step of coupling the bonnet part to the housing body; a tenth step of separating the sealing device from the housing body; and an eleventh step of coupling the bonnet part to the housing body and coupling the valve cap and the bonnet fixing flange to the bonnet part.

Description

Gate valve with bonnet replacement structure and bonnet replacement method of the same}

The present invention relates to a gate valve having a bonnet replacement structure and a bonnet replacement method, and more particularly, to remove a bonnet fixing flange from a gate valve installed in a pipe, and then install a sealing device and a bonnet replacement device. The present invention relates to a gate valve and a bonnet replacement method having a bonnet replacement structure which enables to simplify an old bonnet and replace another bonnet, thereby allowing the bonnet to be replaced without blocking the conveyed material transported through the pipe during the replacement process.

In general, the gate valve is an opening and closing device used to control the flow of the fluid in the pipe, because the disk and the valve body in the gate valve is in close contact with each other because the better air tightness can control the flow of the fluid.

As such, the performance of the gate valve varies greatly depending on the structure of the disk. In particular, in order to improve the airtightness of the gate valve, the close contact between the disk and the valve body must be very close, and thus the flow of fluid can be controlled. .

Accordingly, friction occurs between the valve seat and the valve body, and as a result, the surface of the valve seat is worn and a gap is generated, and a leakage of fluid occurs through the gap, thereby significantly reducing airtightness.

In addition, in the process of elevating the disk up and down with the screw type, the wear of the thread or the O-ring of the valve, etc., corrodes, causing water leakage.

Conventionally, when a leak occurs in a valve, a pipe connected to the valve is closed by a stepless method to replace a disk, an O-ring, and elevating parts, and then a connection pipe is installed to circulate. Branch through and replace.

However, in the conventional valve replacement method, a troublesome problem arises in that a connection pipe is to be installed and a connection pipe is installed by a sub means, and an additional shutoff device is required to block the liquid and gas moving along the pipe. Therefore, there is a problem that the replacement time takes a lot and the replacement cost is excessively increased.

Recently, in order to solve the above problems, a gate valve is installed to block or open an object to be transported to a pipe, and the airtightness is maintained so that various parts of the gate valve can be replaced without controlling the flow of the pipe. The disclosed technology is disclosed as in Korean Patent Registration No. 1723851.

However, in recent years, the gate valve can be replaced with various components provided in the gate valve, but since the gate cannot be replaced, the aging gate must be replaced while controlling the flow of the pipe. Since there is a need for installation, the replacement time is delayed and the replacement cost increases.

The foregoing invention refers to the background of the art to which the present invention pertains, and does not mean the prior art.

Republic of Korea Patent Application No. 10-2014-0132194

The present invention has been made to solve the above-mentioned conventional problems, the object of the present invention is to remove the bonnet fixing flange from the gate valve installed in the pipe and then install the sealing device and the bonnet replacement device after the old bonnet of the gate valve It is an object of the present invention to provide a gate valve and a bonnet replacement method having a bonnet replacement structure that allows the bonnet to be replaced without interrupting the conveyed material transported through the pipe during the replacement process.

The present invention is a replacement method for replacing the bonnet portion of the gate valve installed in the pipe, the first step of removing the bonnet fixing flange from the housing body of the gate valve installed in the pipe, the valve cap from the bonnet portion, and the housing body A second step of fastening the sealing device to the support flange formed in the second step; a third step of installing the bonnet replacement device on the upper part of the sealing device; and a fourth step of drawing out the bonnet part from the housing body by the bonnet replacement device; And a fifth step of closing the sealed housing of the closure device, a sixth step of separating the bonnet replacement device from the closure device, and separating the bonnet part drawn from the bonnet replacement device and then fastening another bonnet part. Step 7 and the eighth step of opening the sealed housing after installing the bonnet replacement device in the sealed housing And a ninth step of fastening the bonnet part of the bonnet replacement device to the housing body, a tenth step of separating the bonnet replacement device from the sealing device, and then separating the seal device from the housing body; And an eleventh step of fastening the valve cap and the bonnet fixing flange to the part.

In addition, the housing body has a jaw portion is formed so as to support the casing lower portion of the bonnet portion therein, the jaw portion is further provided with an airtight ring to maintain the casing and airtight, the screw hole is further on both sides to press and fix the casing Characterized in that formed.

In addition, the bonnet portion has a lower opening and a fastening space is formed therein, a through hole is formed on the upper surface in communication with the fastening space, the through hole is formed with a seating jaw, and both sides have a screw jaw and a fastening jaw formed in the casing; The upper portion is fitted to the casing, the lower portion is disposed in the housing body, the shaft hole is formed on the upper surface and the nut unit is provided to communicate with the shaft hole therein, and through the through hole is fastened to the nut unit and the upper portion A rotating shaft having a locking protrusion formed to be caught by the seating jaw, and an operating hole formed to penetrate the upper end of the rotating shaft, is characterized by consisting of an airtight panel disposed on the upper surface of the casing.

In addition, the screw jaw is characterized in that the curved pressing surface is further formed.

The present invention is a gate valve installed in the pipe and provided with a bonnet portion, the connecting pipe connected to the pipe and formed with a blocking hole in the upper portion, the upper case formed in the connecting pipe in communication with the blocking hole of the connecting pipe is an open rectangular case A housing body having a structure, a bonnet part installed on the housing body, a bonnet fixing flange having a support hole formed through the center thereof to fix the bonnet part to the housing body, and a valve cap fastened to the rotation shaft of the bonnet part. It features.

Gate valve having a bonnet replacement structure and the bonnet replacement method of the present invention is to remove the bonnet fixing flange from the gate valve installed in the pipe, and then install the sealing device and the bonnet replacement device to simplify the old bonnet of the gate valve and to replace the other bonnet. Since it can be replaced, there is an effect that can replace the bonnet without blocking the conveyed material transported through the pipe during the replacement process.

1 is a side view showing a gate valve in the bonnet replacement method of the gate valve according to the present invention.
Figure 2 is a front view showing a gate valve in the bonnet replacement method of the gate valve according to the present invention.
3 is a plan view showing the gate valve in the bonnet replacement method of the gate valve according to the present invention.
Figure 4 is an exploded view showing the bonnet in the bonnet replacement method of the gate valve according to the present invention.
5 is a view showing a first step of the bonnet replacement method of the gate valve according to the present invention.
6 is a view showing a second step of the bonnet replacement method of the gate valve according to the present invention.
7 is a view showing a third step of the bonnet replacement method of the gate valve according to the present invention.
8 is a view showing a fourth step of the bonnet replacement method of the gate valve according to the present invention.
9 is a view showing the fifth, sixth and seventh steps of the bonnet replacement method of the gate valve according to the present invention.
10 is a view showing the eighth step and the ninth step of the bonnet replacement method of the gate valve according to the present invention.
11 is a view showing a tenth step of the bonnet replacement method of the gate valve according to the present invention.
12 is a view showing an eleventh step of the bonnet replacement method of the gate valve according to the present invention.

Hereinafter, a preferred embodiment of a gate valve having a bonnet replacement structure and a bonnet replacement method according to the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to the intention or convention of a user or an operator. Therefore, definitions of these terms should be made based on the contents throughout the specification.

In addition, the following examples are not intended to limit the scope of the present invention but merely presented by way of example, and there may be various embodiments implemented through the present invention.

1 is a side view showing a gate valve in the bonnet replacement method of the gate valve according to the present invention, Figure 2 is a front view showing a gate valve in the bonnet replacement method of the gate valve according to the present invention, Figure 3 In the bonnet replacement method of the gate valve according to the invention, a plan view showing the gate valve, Figure 4 is an exploded view showing the bonnet in the bonnet replacement method of the gate valve according to the present invention, Figure 5 is a gate valve according to the present invention FIG. 6 is a view showing a first step of the bonnet replacement method of FIG. 6 is a view showing a second step of the bonnet replacement method of the gate valve according to the present invention, and FIG. 7 is a first view of the bonnet replacement method of the gate valve according to the present invention. 3 is a view showing a third step, Figure 8 is a view showing a fourth step of the bonnet replacement method of the gate valve according to the present invention, Figure 9 is the present invention 5 is a view illustrating the fifth, sixth and seventh steps of the bonnet replacement method of the gate valve according to the present invention, and FIG. 10 is a view illustrating the eighth and ninth steps of the bonnet replacement method of the gate valve according to the present invention. 11 is a view showing a tenth step of the bonnet replacement method of the gate valve according to the present invention, Figure 12 is a view showing an eleventh step of the bonnet replacement method of the gate valve according to the present invention.

As shown in the figure, the gate valve having a bonnet replacement structure according to the present invention and the bonnet replacement method replace the old bonnet part 13 with another bonnet part 13 in the gate valve 10 installed in the pipe 100. As a replacement method, the bonnet replacement method is a first step of removing the valve cap 15, a second step of fastening the sealing device 20 and a third step of installing the bonnet replacement device 30 and the bonnet. A fourth step of drawing the part 13, a fifth step of closing the sealed housing 21, a sixth step of separating the bonnet replacement device 30, and a seventh step of fastening the bonnet part 13 Eighth step of opening the housing 21, the ninth step of fastening the housing body 12 and the tenth step of separating the sealing device 20 and the valve cap 15 and the bonnet fixed to the bonnet part 13 And an eleventh step of fastening the flange 14.

The first step is to remove the bonnet fixing flange 14 bolted to the support flange 125 of the housing body 12 of the gate valve 10 installed in the pipe 100, the rotation shaft of the bonnet part 13 133 is a step of separating the valve cap 15 fitted on the top.

The gate valve 10 is connected to the pipe 100 and formed in the connection pipe 11 so as to communicate with the connection pipe 100, 11 and the blocking hole of the connection pipe 11 formed with a blocking hole on the upper side. A housing body 12 having a rectangular or oval case structure with an open upper surface, and a bonnet part 13 and the bonnet part 13 installed on the housing body 12 to be fixed to the housing body 12. Consists of a bonnet fixing flange 14 having a support hole formed through the center thereof and a valve cap 15 fastened to the rotation shaft 133 of the bonnet part 13.

The housing main body 12 has a jaw portion 121 formed therein so that the lower portion of the casing 131 of the bonnet portion 13 is supported therein, and the jaw portion 121 has an airtight groove so as to maintain airtightness with the casing 131. And forming an upper part of the hermetic ring 122 in the hermetic groove so as to maintain hermeticity between the housing body 12 and the casing 131 to be described later, and pressurizing and fixing the casing 131. The screw hole 123 is further formed.

The hermetic ring 122 may have a groove formed on an outer surface of the casing 131 and inserted into the groove so that airtightness is maintained between the housing body 12 and the casing 131.

The bonnet part 13 is made of a metal material, the lower part is opened and a fastening space is formed therein, a through hole 131a is formed on the upper surface to communicate with the fastening space, and a seating jaw 131b is formed in the through hole. And a casing 131 having a rectangular or elliptical case structure having a screw jaw 131c and a fastening jaw 131d formed on both sides thereof, and an upper portion of the casing 131 fitted thereto, and a lower portion of the casing 131c disposed on the housing body 12. And a shaft hole 132a formed on an upper surface thereof, and a nut unit 132b provided therein so as to communicate with the shaft hole 132a, and a disk 132 for opening or closing the connection pipe 11 and the through hole. A screw shaft 133a is formed to penetrate the screw unit 132b, and a locking protrusion 133a is formed on the upper surface of the nut unit 132b, and an upper end portion of the rotary shaft 133 is formed. The operating hole 134a is formed to penetrate through The airtight panel 134 is made of a synthetic resin material having elasticity disposed on the upper surface of the casing 131. At this time, the fastening jaw (131d) is preferably formed to surround the outer surface of the casing (131).

The disk 132 is formed of a synthetic resin material having elasticity, as shown in Figure 3, the shaft hole 132a is formed so that the rotating screw is introduced, the nut unit 132b is formed on the upper side of the shaft hole (132a) It is provided in communication with the shaft hole (132a), the disk 132 is lifted up and down inside the gate valve 10 by the rotation of the rotating screw to close or open the connection pipe (100, 11). Let's go. The upper portion of the disk 132 forms a coupling hole in communication with the shaft hole 132a, and the nut unit 132b is forcibly fitted into the coupling hole.

The bonnet part 13 inserted into the housing main body 12 has the bonnet fixing flange 14 inserted into the casing 131 and then bolts to the support flange 125 to fix the bonnet part 13. The support hole rim portion of the bonnet fixing flange 14 is caught by the fastening jaw 131d formed on the outer surface of the casing 131 to prevent the casing 131 from falling out of the housing body 12. Done.

The second step is to fix the sealing device 20 by bolting to the support flange 125 formed in the housing body (12).

The sealing device 20 is provided with a door 22 that is operated by a cylinder in the sealed housing 21 of the penetrating structure, thereby opening or closing the sealed housing 21.

The third step is to fasten by fixing the bonnet replacement device 30 to the upper portion of the sealing device (20).

The bonnet replacement device 30 is provided with a drawing housing 31 in the lower portion, the operating housing 32 is formed in communication with the upper portion of the drawing housing 31, the operating housing 32 is provided with a screw thread on the outer surface The lifting screw 33 is fixed to the upper end of the elevating screw 33 and rotated in its original position. The elevating screw 33 is closed with a lower portion of the elevating screw 33 and a screw thread is formed on the inner circumference thereof. By the rotation of the elevating up and down in the drawing, the coupling groove 341 is formed on the bottom of the elevating pipe 34 to be forcibly fitted to the upper end of the rotating shaft 133.

At this time, the lower portion of the elevating pipe 34 may be formed of a magnetic material, so that the rotating shaft 133 of the metal is fitted into the coupling groove 341 and then fixed by magnetic force.

Alternatively, a lower portion of the elevating pipe 34 is formed in a closed structure, and a lower portion of the elevating pipe 34 forms a fastening portion made of a synthetic resin material having elasticity, and the coupling groove 341 is formed in the fastening portion. It is preferable to form a, to form an annular seating groove in the inner circumference of the coupling groove 341, the upper end of the rotating shaft 133 is fitted into the coupling groove 341 and then annular to be seated in the seating groove It is preferable to further form the seating protrusion of.

In addition, the coupling groove 341 may be formed of a metal material in the same manner as the lifting pipe 34, and the upper end portion of the rotation shaft may be formed of a synthetic resin material having elasticity, such that the coupling groove 341 may be pressed into the coupling groove 341. Do.

The fourth step is to draw the bonnet part 13 from the housing body 12 to the bonnet replacement device 30.

The lifting screw 33 rotates from the outside to allow the lifting pipe 34 to penetrate the sealed housing 21 to insert the coupling groove 341 at the end of the rotating shaft 133 of the bonnet, and then to lift the lifting screw 33. ) By rotating the bonnet in the opposite direction to separate the bonnet from the housing body 12 and to move to the working housing 32.

At this time, while pressing the outer surface of the casing 131 in the screw hole 123 of the housing body 12 and the screw jaw (131c) is caught, the casing 131 is upward from the housing body 12 The pressure bolt 124, which is a tannery bolt, is to be prevented from falling out. At this time, the pressure bolt 124 may be replaced by a pin.

When the disk 132 is disposed inside the housing body 12, the housing body 12 is closed to prevent the transfer of the connection pipe 11 from flowing out through the housing body 12. Done.

The outer periphery of the disk 132 is preferably to form a pressing projection to press the inner surface of the housing body 12. The pressing protrusion is formed to surround the outer surface of the disk 132, it is preferable to further form a locking groove in the inner surface of the housing body 12 so that the pressing projection is introduced.

The fifth step is a step of closing the sealed housing 21 of the sealed device (20).

After the bonnet is moved to the working housing 32, the sealed housing 21 is closed to block the transfer of the moving material to the pipe 100 from moving to the working housing 32.

The sixth step is to separate the bonnet replacement device 30 from the closure device 20.

In order to replace the bonnet moved to the bonnet replacement device 30, the bonnet replacement device 30 bolted to the sealing device 20 is separated.

In the seventh step, the bonnet part 13 drawn out from the bonnet replacement apparatus 30 is separated from the elevating pipe 34, and then the elevating pipe 34 has an upper end of the rotary shaft 133 of the other bonnet part 13. It is a step of fitting into the coupling groove 341 of the.

The eighth step is a step of opening the sealed housing 21 after the bonnet replacement device 30 is installed in the sealed housing 21.

The door 22 of the closure device 20 is operated to open the closure housing 21.

The ninth step is fastening the bonnet part 13 of the bonnet replacement device 30 to the housing body 12.

The bonnet fastened to the elevating pipe 34 is inserted into the housing body 12 while moving downwardly of the elevating pipe 34 by the rotation of the rotary shaft 133.

At this time, the pressure bolt 124 is fastened to the screw hole 123 of the housing body 12 so that the end of the pressure bolt 124 presses the outer surface of the casing 131 and the screw jaw 131c. By being caught, the casing 131 is prevented from falling upward from the housing body 12.

A curved pressing surface 131c 'is further formed on the screw jaw 131c, and when the end of the pressing bolt presses the pressing surface 131c', the pressing bolt presses the pressing surface 131c '. 124 is moved downward in the drawing to prevent the casing 131 is moved upward. At this time, the end of the pressing bolt 124 is preferably formed as a curved pressure guide surface, so that the pressing surface (131c ') is to be moved downward by the pressure guide surface for pressing.

The tenth step is a step of separating the sealing device 20 from the housing body 12 after removing the bonnet replacement device 30 bolted to the sealing device 20.

The eleventh step is a step of fastening the valve cap 15 and the bonnet fixing flange 14 to the bonnet part 13.

The valve cap 15 is fixed to the upper portion of the rotation shaft 133 of the bonnet part 13, and the casing 131 is fixed by bolting the bonnet fixing flange 14 to the support flange 125. Let's go.

The gate valve having the bonnet replacement structure and the bonnet replacement method according to the present invention have been described in detail above with reference to the accompanying drawings.

The gate valve having a bonnet replacement structure and the bonnet replacement method according to the present invention described above, after removing the bonnet fixing flange from the gate valve installed in the pipe, and then install the sealing device and the bonnet replacement device to remove the old bonnet of the gate valve The other bonnet can be easily replaced and replaced, so that the bonnet can be replaced without interruption of the conveyed material transported through the pipe during the replacement process, thereby preventing the conventional problem of installing a separate blocking device on the pipe.

One embodiment of the present invention described above is merely exemplary, and those skilled in the art will appreciate that various modifications and equivalent other embodiments are possible therefrom. . Therefore, it will be understood that the present invention is not limited to the forms mentioned in the above detailed description. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims. It is also to be understood that the present invention includes all modifications, equivalents, and substitutes within the spirit and scope of the invention as defined by the appended claims.

10: gate valve 20: sealing device
30: Bonnet replacement device
11: connecting pipe 12: housing body
121: jaw 122: airtight ring
123: screw hole 124: pressure bolt
13: Bonnet part 131: Casing
131a: through hole 131b: seating jaw
131c: Screw jaw 131c ': Pressing surface
131d: tightening jaw
132: disc 132a: shaft hole
132b: Nut unit 133: rotating shaft
133a: protrusion 134: airtight panel
134a: Operator
14: Bonnet fixed flange 15: Valve cap
21: sealed housing 22: door
31: take-out housing 32: working housing
33: lifting screw 34: lifting pipe
341: coupling groove
100: piping

Claims (5)

As a replacement method to replace the bonnet of the gate valve installed in the pipe,
A first step of removing the bonnet fixing flange from the housing body of the gate valve installed in the pipe, and removing the valve cap from the bonnet part;
A second step of fastening a sealing device to a support flange formed on the housing body;
A third step of installing a replaceable bonnet on an upper portion of the sealing device;
A fourth step of drawing out the bonnet part from the housing body with the bonnet replacement device;
A fifth step of closing the sealed housing of the sealed device;
A sixth step of separating the bonnet replacement device from the sealed device;
A seventh step of separating the bonnet part drawn from the bonnet replacing apparatus and then fastening another bonnet part;
An eighth step of installing the bonnet replacement device in the sealed housing and opening the sealed housing;
A ninth step of fastening the bonnet part of the bonnet replacement device to the housing body;
A tenth step of separating the sealing device from the housing body after separating the replacing the bonnet from the sealing device; And
And an eleventh step of fastening the valve cap and the bonnet fixing flange to the bonnet part.
The bonnet part has a lower opening and a fastening space is formed therein, a through hole is formed on the upper surface to communicate with the fastening space, and a seating jaw is formed on the through hole, and a casing and a fastening jaw are formed on both sides;
A disk having an upper portion fitted to the casing, a lower portion disposed on the housing body, a shaft hole formed on an upper surface thereof, and a nut unit provided therein so as to communicate with the shaft hole;
Rotating shaft through the through-hole is fastened to the nut unit and the locking projection formed on the upper end to be caught on the seating jaw,
An operating hole is formed to pass through the upper end of the rotating shaft and the bonnet replacement method of the gate valve, characterized in that made of an airtight panel disposed on the upper surface of the casing.
The method according to claim 1,
The housing body has a jaw portion is formed to support the lower casing of the bonnet portion therein,
The jaw is further provided with an airtight ring to keep the casing and the airtight,
The bonnet replacement method of the gate valve, characterized in that the threaded holes are further formed on both sides to press and fix the casing.
delete The method according to claim 1,
Bonnet replacement method of the gate valve, characterized in that the screw jaw is further formed a curved pressing surface.
A gate valve installed in the pipe and provided with a bonnet part,
A connection pipe connected to the pipe and having a blocking hole formed thereon;
A housing body having a case structure in which an upper surface formed in the connection pipe is opened so as to communicate with a blocking hole of the connection pipe;
A bonnet part installed in the housing main body;
A bonnet fixing flange having a support hole formed at a center thereof to fix the bonnet to the housing main body; And
And a valve cap fastened to the rotation shaft of the bonnet part.
The bonnet part has a lower opening and a fastening space is formed therein, a through hole is formed on the upper surface to communicate with the fastening space, and a seating jaw is formed on the through hole, and a casing and a fastening jaw are formed on both sides;
A disk having an upper portion fitted to the casing, a lower portion disposed on the housing body, a shaft hole formed on an upper surface thereof, and a nut unit provided therein so as to communicate with the shaft hole;
Rotating shaft through the through-hole is fastened to the nut unit and the locking projection formed on the upper end to be caught on the seating jaw,
The gate valve having a bonnet replacement structure, characterized in that the operating hole is formed so as to penetrate the upper end of the rotating shaft and an airtight panel disposed on the upper surface of the casing.

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