KR100991500B1 - Outer Thread Gate Valve For Fire Breaking - Google Patents

Abstract

Outer thread gate valve 100 for fire according to the present invention has a flange portion 119 connected to the connection pipe 160 connected between the pipe and the cylindrical lower body 113 formed with a through hole, and the lower body Yoke 115 branched to the upper portion of the 113 and the upper body 111 provided with an upper portion of the yoke 115 and has a through-hole formed to have a radial clearance between the valve stem 140 Section 110; A valve stem 140 inserted into a through hole formed in the upper body 111 and the lower body 113 of the yoke part 110 and having a circular rod shape having a thread formed outwardly; A handle 120 positioned above the upper body 111 to move the valve stem 140 up and down; A gate 197 provided at a lower end of the valve seat 140 and positioned inside the connection pipe 160; A magnet 183 fixed to the valve seat 140; It is fixed to the upper body 111 and comprises a display means 200 having a reed switch that reacts with the magnet 183, so that even if an external force is applied there is no change in the position of the display means 200 The reed switch is not affected by foreign matters, the installation structure of the handle 120 is firm, and the radial displacement of the valve stem 140 does not occur even when a high pressure is applied to the gate 197. There is.

Valve, fire fighting, gate, marking

Description

Outer Thread Gate Valve For Fire Breaking}

The present invention relates to a gate valve for fire fighting, and more particularly, it is possible to check whether the opening and closing state is provided with a display means, there is no fear that an error occurs in the display means, it is possible to firmly install the display means, the operation The present invention relates to a fire fighting external thread gate valve having a stable state and improved rigidity.

An air conditioning system is installed in a building, and a fire fighting system for fire is installed. Fire extinguishers include a fire extinguisher and a fire hydrant, and one or more gate valves are installed at the discharge port of the water tank and the control line of the sprinkler fire valve for supplying water. The gate valve is installed in a connection pipe connecting pipes between pipes through which fluid such as water flows.

1 is a perspective view illustrating an external thread gate valve for fire fighting according to the prior art, FIG. 2 is an enlarged perspective view of the gate valve of FIG. 1, and FIG. 3 is a perspective view illustrating a modified example of the gate valve of FIG. 1.

As shown in FIGS. 1 and 2, a fire gate valve including the display means according to the related art is composed of a valve stem 1b movable in the longitudinal direction by the rotation of the handle 1a and a water tank (not shown). It is used as a valve to discharge the water of the hydrant (not shown) or the control line of the sprinkler.

A screw hole is formed in the valve yoke 1c for rotatably supporting the handle 1a of the valve 1, and the bracket 11 on which the opening / closing detection switch 10 is mounted is attached to the valve yoke 1c. It is fastened to the screw hole formed in the opening and closing detection switch operation to operate the opening and closing detection switch operating portion 10a protruding from the opening and closing detection switch 10 installed in the bracket 11 at the time of opening the valve (1). A means is installed in the valve seat 1b of the said valve 1.

The bracket 11 has a plurality of both ends are bent in the same direction and forming a long hole at each end to match the screw hole formed in the valve yoke (1c) and the long hole in the mounting adjustment unit (11a), and the opening and closing The sensing switch 10 is fixed to a predetermined position and consists of a switch support part 11b joined to the center of the installation adjustment part 11a.

The opening and closing detection switch 10 is to be energized while the opening and closing the detection switch operating unit (10a) is rotated at a predetermined angle by mechanically joining the contacts inside, this energized signal is transmitted to the receiving panel Identifies whether the valve is open or closed.

Thus, the opening and closing detection switch operating means is to operate the opening and closing detection switch operating part while moving in the longitudinal direction with the valve seat (1b) of the valve, the hollow cone-shaped moving sleeve 20 divided into two is the valve It is installed with the base 1b therebetween, and moves between the head of the bolt 21 and the outer surface of the movable sleeve 20 and one surface of the nut 22 so that each divided movable sleeve 20 is elastically coupled. An elastic member 23 is installed between the outer surfaces of the sleeve 20 to install the bolts 21 and the nuts 22 on both sides of the lower side of the movable sleeve 20.

When the handle 1a of the valve 1 rotates, the valve stem 1b rises in the longitudinal direction, and at the same time, the movable sleeve 20 rises.

Then, the movable sleeve 20 operates the opening / closing detection switch operating part 10a of the opening / closing detection switch 10 at a position where the opening state of the valve 1 becomes more than a predetermined level as shown by the dashed-dotted line of FIG. 2. By the operation of the opening and closing detection switch operating unit (10a) is energized to recognize the open state of the valve (1) in the receiving panel. When the valve 1 is closed due to the fire hydrant or the work of the sprinkler control line, the handle 1a of the valve 1 is rotated in the reverse direction. The valve stem 1b moves downward in the longitudinal direction by the rotation of the handle 1a, and the movable sleeve 20 moves downward in the longitudinal direction of the valve stem 1b. Thus, the opening and closing detection switch operating unit (10a) is in the initial neutral state is not operated.

3 is a perspective view showing a fire gate valve having a display means according to the prior art. As shown in FIG. 3, the conventional open / close detection switch operating means inserts a roller installed at an end of the open / close detection switch operating portion 10a and operates the open / close detection switch operating portion 10a when the valve is opened. The groove | channel 24 is formed in the valve seat 1b by predetermined length in the longitudinal direction of (1b).

Fire gate valve (1) having a display means according to the prior art as described above is a structure in which the open and close detection switch 10, which is a display means is exposed to the outside, so the external force is likely to act, and also because the installation is not robust, small Even when an external force is applied, shaking may occur, which may cause an error in sensing.There is a high possibility of breakage during transportation. There is a high possibility that the fluid flows through the gap of the, there was a problem that the installation structure of the handle is not solid.

The present invention has been proposed to solve the problems of the prior art as described above, the external structure is not easy to act on the display means and the shake is prevented even when the external force is applied, the structure is not exposed to the reed switch sensor Therefore, it is not affected by foreign substances, and the rigidity of the rotating structure where the handle is installed is improved, and even if the pressure of the fluid acts on the gate, it prevents the radial displacement of the valve stem to minimize the gap between the gate and the connecting pipe. It is an object of the present invention to provide a fire fighting external thread gate valve.

Fire extinguishing external thread gate valve according to the present invention for achieving the above object is provided with a flange portion connected to the connection pipe connected between the pipe and the cylindrical lower body is formed through holes inward, branched to extend the upper portion of the lower body A yoke portion formed of an upper body having a yoke formed at an upper portion of the yoke and having a radial clearance between the valve seat; A valve seat inserted into a through hole formed in the upper body and the lower body of the yoke part and having a circular rod shape having a thread formed outwardly; A handle disposed to be positioned above the upper body and configured to vertically move a valve seat; A gate provided at a lower end of the valve seat and positioned inside the connection pipe; A magnet fixed to the valve seat; It is fixed to the upper body and characterized in that it comprises a display means having a reed switch to react with the magnet.

In the through-hole formed in the upper portion of the upper jaw portion is formed, the intermediate member is inserted so that the annular portion is caught in the jaw portion, the fastening member is formed in the gap formed between the intermediate member and the upper body from the upper portion of the upper body The screw is inserted into the inside of the middle member to prevent separation of the intermediate member, the hub of the handle is connected to the outside of the intermediate member protruding to the upper portion of the fastening member by the spline, the intermediate member protruding to the top of the hub An outer thread is formed on the outside of the nut and the nut is fastened to fix the hub to the intermediate member. A screw part is formed on the inner side of the intermediate member to engage with a thread formed on the outside of the valve seat, between the upper body and the valve seat. It is characterized in that the gap is formed in the radial direction.

In the above, the display means includes a main body portion with a space portion formed therein; A support member protruding from one side of the main body so as to be inserted into a radial gap between the upper body and the valve stem and having a concave arc surface; An installation protrusion spaced apart from the support member and protruding in a protruding direction of the support member toward one side of the main body and having one or more fixing holes formed to be fixed to the outside of the upper body; An upper surface formed between the support member and the installation protrusion and corresponding to a bottom surface of the upper body; A reed switch provided in a space formed in the main body; It is characterized in that it comprises a light emitting means connected to the reed switch and provided to be exposed to the outside of the body portion.

The main body portion of the display means comprises a first main body and a second main body; The first body is in communication with the concave portion, the side member is formed with a concave portion, the installation projection protruding to the upper portion of the side member and the fixing hole is formed, one or more projection members protruding from the concave portion and threaded inwardly; A hole is formed and comprises a connecting member extending in a direction perpendicular to the protruding direction of the installation projection; The second main body includes a side portion having a recess portion and an insertion member having a step from the end of the side portion and extending in a direction opposite to the direction in which the recess portion is formed and inserted into the side member; A screw hole is formed in a bottom surface of the concave portion of the second main body, and the first main body and the second main body are coupled by screwing to the protrusion member through the screw hole in the state where the insertion member is inserted; The recessed portion of the first body and the recessed portion of the second body is characterized in that the space portion is provided with the reed switch and the light emitting means is formed.

A gap is formed in the radial direction between the through hole formed in the lower body and the valve stem inserted into the through hole, and the gap is provided with a seal, and an inner nut for supporting the seal in the axial direction from the lower part of the lower body includes a seal. Screwed inward and further comprising a support for supporting the seal in an axial direction from the top of the seal; The lower body has a concave portion is formed and has a projection projecting to both sides in the radial direction, the support is made of a cylindrical portion in contact with the upper surface of the seal and a projection formed in the protrusion direction of the projection from the cylindrical portion and the through hole is formed In addition, the bolt and the nut are fastened so that both sides of the through hole and the concave portion are installed by pressing the seal with a support.

The external threaded gate valve 100 for fire according to the present invention as described above forms a gap between the upper body 111 and the valve stem 140 and is inserted into the gap in and out of the upper body 111. By installing the display means 200 to be supported in the position change even when the external force acts on the display means 200, the reed switch is not exposed to the outside structure is not affected by foreign substances such as moisture, Since the mounting structure of the handle 120 is firm, and the seal 195 firmly supported in the axial direction can be installed between the lower body 113 and the valve stem 140, the valve stem 140 is formed by the seal 196. In addition, the radial movement of the valve is also prevented, and even if a high pressure is applied to the gate 197, the radial displacement of the valve seat 140 does not occur, so that there is no fear of a gap between the gate 197 and the connection pipe 160. Become effective The.

Hereinafter, an external thread gate valve for fire fighting according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the detailed description, the same description as in the prior art is omitted, and the same name is used for the configuration having the same function.

Figure 4 is a front view showing the outer threaded gate valve for fire according to the present invention, Figure 5 is a schematic half-sectional view taken along line AA of Figure 4, Figure 6 is a schematic diagram showing the display means provided in the gate valve of the present invention 7 is a schematic perspective view illustrating a first main body constituting the display means illustrated in FIG. 6, and FIG. 8 is a schematic perspective view illustrating a second main body constituting the display means illustrated in FIG. 6. 9 is a front perspective view of the first body illustrated in FIG. 7, and FIG. 10 is an enlarged view of a portion A of FIG. 5.

As shown in FIGS. 4, 5, and 10, the outer threaded gate valve 100 for fire according to the preferred embodiment of the present invention penetrates the yoke portion 110 and the yoke portion 110 that form a body. A valve seat 140 provided at the upper portion of the yoke part 110 and a handle 120 for moving the valve seat 140 up and down, and a gate provided at a lower end of the valve seat 140. 197, and the display means 200 is installed on the yoke unit 110. The gate valve 100 according to the present invention is installed in the connecting pipe 160.

As shown in FIGS. 4 and 5, the connection pipe 160 is installed between pipes and includes a flange 161 having a plurality of fastening holes 163 formed at both sides thereof for installation in the pipe. And a flange 167 having a plurality of fastening holes for connecting and installing the gate valve. The flange 167 is generally formed in a direction perpendicular to the flange 161 provided on both sides, and may be formed to have an angle different from 90 °. The connecting pipe 160 has a through hole 165 communicated with the flanges 161 and 167 inward. When the yoke unit 110 is connected to the connection pipe 160, the gate 197 is located in the through hole 165 and opens and closes the through hole 165 through the flange 161 located at the left and right sides.

The yoke unit 110 has a flange portion 119 connected to the flange 167 of the connecting pipe 160 as shown in FIGS. 4 and 5 and has a lower body 113 having a through hole formed therein. The yoke 115 branched to the upper portion of the lower body 113 and the upper body 111 provided with an upper portion of the yoke 115 and formed with a through hole. A plurality of fastening holes (not shown) may be formed in the flange portion 119 to be screwed to the flange 167.

The valve stem 140 is inserted into a through hole formed in the upper body 111 and the lower body 113 of the yoke unit 110. The valve stem 140 is a rod-shaped threaded outward. The gate 197 is connected to the lower end of the valve seat 140. The gate 197 may be connected to the valve stem 140 in a relatively rotatable manner. The magnet 183 is installed on the valve stem 140. As shown in FIG. 5, the magnet 183 includes a reed switch (not shown) of the display means 200 in a state where the gate 197 is raised and the through hole 165 formed between the flanges 161 is completely opened. It is preferable to install on the valve stem 140 so as to face. The reed switch is a switch in which the electrical contact is interrupted by the action of the magnet 183.

As shown in FIGS. 5 and 10, a gap is formed between the through hole formed in the upper body 111 and the valve stem 140 in the radial direction. In addition, the support member 223 of the display means 200 is positioned in the gap, and the mounting protrusion 213 is fixed to the outside of the upper body 111 so that the display means 200 is firmly attached to the upper body 111. It is possible to install. In the above, the support member 223 is preferably in contact with the upper body 111 from the inside, it is preferable to reduce the gap between the support member 223 and the upper body 111 if possible even if not contacted. . When the external force is applied, the support member 223 is in contact with the upper body 111 on the inner surface to act against the external force, and the mounting protrusion 213 is fixed at the outside so that the display means 200 is driven by the external force. It is possible to reduce the displacements and deformations that occur.

As shown in FIGS. 5 and 10, the jaw portion 111a is formed inside the upper body 111, and the intermediate member 130 is inserted between the upper body 111 and the valve stem 140. The annular portion 130a of the member 130 is caught by the jaw portion 111a, and a fastening member 161 is inserted between the intermediate member 130 and the upper body 111 and then into the upper body 111. By screwing into the formed screw portion (not shown), the intermediate member 130 is prevented from being separated in the axial direction (up and down direction in Figures 5 and 10). The hub 121 of the handle 120 is coupled to the intermediate member 130 protruding to the upper portion of the fastening member 161 to the spline portion 137, and the intermediate member 130 protruding to the upper portion of the hub 121. To form a screw on the outside and screwed with a nut 125 so that the hub 121 is fixed to the intermediate member (130). The handle 120 and the intermediate member 130 coupled to the spline portion 137 is rotated integrally. In the above, the threaded portion 138 is formed on the inner side of the intermediate member 130 to be engaged with the screw thread formed on the outer side of the valve seat 140. When the handle 120 is rotated, the intermediate member 130 rotates and the valve stem 140 moves up and down in accordance with the rotation direction.

As shown in FIG. 5, a seal 195 is installed between the lower body 113 and the valve stem 140 to prevent leakage of the fluid. The lower body 113 includes a protrusion 118 that protrudes in a radial direction and has a concave portion 117 formed to be concave. The protrusion 118 is preferably provided to protrude to both sides between the yoke (115). The inner nut 181 is inserted into the lower portion of the lower body 113 to support the seal 195 provided between the lower body 113 and the valve stem 140 in the axial direction. The inner nut 181 is screwed to the outer diameter surface is screwed into the through hole of the lower body 113. The upper portion of the lower body 113 has a cylindrical portion 175 is formed through the through-hole through which the valve stem 140 is inserted, and a protrusion formed in the radial direction from the cylindrical portion 175 and the through-hole 173 ( The support 170 which consists of 171 is provided. The bolt 191 is fastened to the nut 193 to be caught by the through hole 173 and the recess 117. By the fastening of the bolt 191 and the nut 193, the cylindrical portion 175 of the support 170 contacts the upper surface of the seal 195 and supports the seal 195 in the axial direction from the top. Since the seal 195 is supported above and below, the seal 195 serves to prevent the leakage of the fluid and to support the valve stem 140 in the radial direction.

As shown in FIGS. 4 to 10, the display means 200 includes a main body portion having a space portion formed therein, a reed switch provided in a space portion formed inside the main body portion, and an outer side of the main body portion connected to the reed switch. It is configured to include a light emitting means 233 is installed so that a portion is exposed. The reed switch is operated by the magnet 183 fixedly installed on the valve seat 140 to be turned on / off to act to light or turn off the light emitting means 233. The light emitting means 233 may be an LED lamp.

The reed switch may be connected to another light emitting means (not shown) of the control room that controls the gate valve 100 to remotely check the open / closed state of the gate valve 100. The light emitting means 233 is connected to a power source (not shown) through the reed switch.

As shown in FIGS. 6 to 9, the main body includes a first main body 210 and a second main body 220.

As shown in FIGS. 4, 7, and 9, the first body 210 protrudes and extends to the upper side of the side member 219 and the side member 219 having the concave portion 211a formed therein. An installation protrusion 213 having a 214 formed therein, one or more protrusion members 217 protruding from the recess 211a and having a thread formed therein, and a hole 215a communicating with the recess 211a are formed. And a connecting member 215 extending in a vertical direction with a protruding direction of the installation protrusion 213. As shown in FIG. 4, a screw hole (not shown) is formed on the outer side of the upper body 111, and the mounting protrusion 213 is screwed into the fixing screw 199 through the fixing hole 214. It is fixed to the upper body 111. A signal line connected to a reed switch and a power line connected to the light emitting means 233 pass through the hole 215a formed in the connection member 215. In FIG. 9, reference numeral 216 illustrates a thread formed inward of the connection member 215. Fixing means (not shown) are fastened while passing through the signal line and the power line to the screw portion 216.

As shown in FIGS. 6 and 8, the second main body 220 has a side portion 226 having a concave portion 221a formed therein, and has a step from the end of the side portion 226 to form a concave portion 221a. Extends in the opposite direction to the insertion member 228 inserted into the side member 219. A screw hole 227 is formed on the bottom surface of the recess 221a of the second body 220, and the screw hole 227 is screwed into the protrusion member 217 through the screw hole 227 in the state where the insertion member 228 is inserted. The first main body 210 and the second main body 220 are combined. The recess 211a of the first body 210 and the recess 221a of the second body 220 form a space in which the reed switch and the light emitting unit 233 are installed. The upper surfaces 211 and 221 of the first body 210 and the second body 220 are formed between the support member 223 and the installation protrusion 213 and have a bottom surface 111b of the upper body 111. An upper surface 231 is formed. In the above, the upper surface 231 and the bottom surface 111b are preferably installed in contact with each other, and the gap formed between the upper surface 231 and the bottom surface 111b is preferably as small as possible. In FIG. 6, reference numeral 225 denotes an arc portion formed to be concave to the outside of the bottom of the recess portion 221a.

The first body 210 and the second body 220 can be manufactured from a synthetic resin such as plastic. In FIG. 5, reference numeral 128 illustrates a rim connected to the hub 121.

The operation of the external threaded gate valve 100 for fire according to the present invention will be described.

Rotating the handle 120 rotates the intermediate member 130 connected to the spline portion 137 through the hub 121, the valve stem 140 engaged with the intermediate member 130 moves up and down, and the valve The gate 197 connected to the bottom of the base 140 also moves up and down. In the state in which the gate 197 is raised in the state shown in FIG. 5 and the through hole 165 is completely opened, the magnet 183 is in a state facing the reed switch provided in the display means 200, and the magnet 183. By the magnetic force of the reed switch is in the 'ON' state (or 'OFF' state), the light emitting means 233 connected to the reed switch is turned on (or off), the through hole 165 can be opened to supply fluid Inform you that you are. Then, as shown in FIG. 5, when the handle 120 is rotated to lower the valve seat 140, the gate 197 is also lowered so that the through hole 165 is blocked, and the magnet 183 is partially blocked. ) Is away from the reed switch, the light emitting means 233 is turned off (or turned on), and indicates that some or all of the through holes 165 are closed. In addition to the light emitting means 233, it is possible to include at least one light emitting means connected to the reed switch in the control room or the like to remotely check the state of the gate valve 100.

While the invention has been shown and described in connection with specific embodiments thereof, it is conventional in the art that various changes, modifications and variations are possible without departing from the spirit and scope of the invention as indicated by the appended claims. Anyone who knows the knowledge of is easy to know.

1 is a perspective view of a firefighting external thread gate valve according to the prior art.

FIG. 2 is an enlarged perspective view of the gate valve of FIG. 1. FIG.

3 is a perspective view illustrating a modified example of the gate valve of FIG. 1.

Figure 4 is a front view showing the outer thread gate valve for fire according to the present invention.

5 is a schematic half-sectional view along the line A-A of FIG.

Figure 6 is a schematic perspective view showing the display means provided in the gate valve of the present invention.

FIG. 7 is a schematic perspective view illustrating a first main body constituting the display unit illustrated in FIG. 6.

FIG. 8 is a schematic perspective view illustrating a second body that forms the display unit illustrated in FIG. 6.

9 is a front perspective view of the first body illustrated in FIG. 7.

FIG. 10 is an enlarged view of a portion A of FIG. 5.

* Description of the symbols for the main parts of the drawings *

100: gate valve 110: yoke part

120: handle 130: intermediate member

140: valve stem 160: connector

170: support 183: magnet

197: gate 200: display means

Claims (5)

A cylindrical lower body 113 having a flange portion 119 connected to a connection pipe 160 connected between pipes and having a through hole formed therein, and a yoke 115 branched to an upper portion of the lower body 113. And a yoke part 110 formed at an upper portion of the yoke 115 and formed of an upper body 111 having a through hole formed therebetween so as to have a radial clearance between the valve seat 140; A valve stem 140 inserted into a through hole formed in the upper body 111 and the lower body 113 of the yoke part 110 and having a circular rod shape having a thread formed outwardly; A handle 120 positioned above the upper body 111 to move the valve stem 140 up and down; A gate 197 provided at a lower end of the valve seat 140 and positioned inside the connection pipe 160; A magnet 183 fixed to the valve seat 140; It is fixed to the upper body 111 and comprises a display means 200 having a reed switch to react with the magnet 183, the display means 200 is a main body portion with a space portion inwardly, A support member 223 formed to protrude upwardly on one side of the main body to be inserted into a radial gap between the upper body 111 and the valve stem 140, and having a concave arc surface 225, and the support member 223. Spaced apart from and protruded in the protruding direction of the support member 223 toward one side of the main body portion, and one or more fixing holes 214 are formed to be installed to be fixed to the outside of the upper body 111 and the support protrusions. An upper surface 231 formed between the member 223 and the installation protrusion 213 and corresponding to the bottom surface 111b of the upper body 111, a reed switch provided in the space portion formed in the main body portion, and the reed switch Is exposed to the outside of the main body Fire outside, characterized in that comprising: a light emitting means 233 is provided with screw gate valve 100. According to claim 1, wherein the jaw portion 111a is formed in the through hole formed in the upper body 111, the intermediate member 130 is inserted so that the annular portion (130a) is caught in the jaw portion (111a), The fastening member 161 is inserted into the gap between the intermediate member 130 and the upper body 111 from the upper portion of the upper body 111 while being screwed into the upper body 111 to insert the intermediate member 130. To prevent separation, the hub 121 of the handle 120 is connected to the outside of the intermediate member 130 protruding to the upper portion of the fastening member 161 by the spline 137, the hub 121 Outside screw portion 136 is formed to the outside of the intermediate member 130 protruding to the top of the) and the nut 125 is fastened to securely install the hub 121 to the intermediate member 130, the intermediate member 130 The inner side of the threaded portion 138 is formed to engage with the thread formed to the outside of the valve stem 140, the upper body 111 and the valve stem 140 This is in the radial direction outside fire protection, it characterized in that the gap is formed screw gate valve 100. delete The method of claim 2, wherein the main body of the display means (200) comprises a first main body (210) and a second main body (220); The first body 210 has a side member 219 having a concave portion 211a, an installation protrusion 213 protruding upward from the side member 219 and having a fixing hole 214 formed therein, and the concave portion. One or more protrusion members 217 protruding from the portion 211a and having a thread formed therein, and holes 215a communicating with the recesses 211a are formed and are perpendicular to the protruding direction of the installation protrusion 213. Consists of a connecting member 215 extending to; The second body 220 has a side portion 226 having a concave portion 221a and a stepped portion from an end of the side portion 226 extending in a direction opposite to the direction in which the concave portion 221a is formed. 219 is inserted into the insertion member 228; A screw hole 227 is formed on the bottom surface of the recess 221a of the second body 220, and the screw hole 227 is screwed into the protrusion member 217 through the screw hole 227 in the state where the insertion member 228 is inserted. The first body 210 and the second body 220 are coupled; The outer thread for the fire, characterized in that the space between the reed switch and the light emitting means 233 is formed by the recess 211a of the first body 210 and the recess 221a of the second body 220. Gate valve 100. According to claim 1, wherein a gap is formed between the through hole formed in the lower body 113 and the valve stem 140 inserted into the through hole in a radial direction, the gap is provided with a seal 195, the lower body ( An inner nut 181 for supporting the seal 195 in the axial direction from the lower part of 113 is screwed into the lower body 113, and supports the seal 195 in the axial direction from the top of the seal 195. It further comprises a support 170 to the; The lower body 113 has a concave portion 117 is formed with a protrusion 118 protruding in both sides in the radial direction, the support 170 is a cylindrical portion 175 in contact with the upper surface of the seal 195 and The protrusion 171 protrudes from the cylindrical portion 175 in the protruding direction of the protrusion 118 and has a through hole 173 formed therein, and bolts are formed on both sides of the through hole 173 and the concave portion 117. 191 and the nut (193) fastening the external thread gate valve 100 for fire, characterized in that the installation to support the seal (195) by the support (170).

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