KR101232194B1 - The method of equippment for fire hydrant - Google Patents

Abstract

The present invention relates to a fire hydrant installation method, in the fire hydrant installation method consisting of a case, a door, a roof and a support frame, the support frame (12a, 12b) is installed at the lower end of the case 10, respectively, the respective support Frames 12a and 12b are embedded in the basement by a predetermined depth, and at this time, a second connecting pipe 26 is inserted into the support frame 12a, and inside another support frame 12b. A valve rod 20 having a handle 18 for opening and closing the hydrant valve 16 is inserted, and a heat insulating material 28 is filled in each of the supporting frames 12a and 12b. The hydrant valve 16 which is opened and closed by the valve rod 20 is installed at the lower part of the supporting frame 12b, and the water supply pipe 14 or the underground well is installed at the lower end of the hydrant valve 16. On one side, the first connecting pipe 22 is installed Water is introduced into the first connecting pipe 22 through the water supply pipe 14 by installing the T-shaped pipe 24 at the end of the first connecting pipe 22 and the second connecting pipe 26 described above. It is to be able to supply smoothly to the second connecting pipe 26, the present invention can effectively extinguish fire even in winter by preventing freezing by embedding a hydrant valve in the basement to supply water to the fire hose in the event of a fire. In addition, it can be selectively connected to the water supply pipe or underground pipe, and has a remarkable effect that is easy to install and easy to manufacture regardless of the terrain.

Description

Fire hydrant installation method {THE METHOD OF EQUIPPMENT FOR FIRE HYDRANT}

The present invention relates to a method for installing a fire hydrant, in particular, by embedding a fire hydrant valve in the basement can prevent freezing in winter, can be selectively connected to a water pipe or underground wells, and easy to install regardless of terrain Fire hydrant installation method.

In general, fire hydrants are installed for the purpose of initial fire extinguishing in places where fire trucks are difficult to enter or in dense areas of houses or buildings.

    That is, looking at the configuration of a conventional fire hydrant to play the role as described above is installed a fire hydrant valve for discharging water for the purpose of fire extinguishing or fire protection into the fire hose and the fire hose to the inside of the case having a rectangular shape made of a metal material. And the lower part of the hydrant valve is connected to the water supply pipe installed in the underground is installed to supply water to the hydrant valve.

    However, in the case of the conventional fire hydrant as described above, since the hydrant valve is installed inside the case located on the ground, freezing occurs due to freezing in the winter when the temperature decreases, so that the fire hydrant valve does not work in the event of a fire, so it can be effectively extinguished. There was no. In addition, even after the fire is extinguished, even if the water is injected into the fire hose by closing the hydrant valve, a small amount of water remains in the connecting pipe, and a separate device for discharging the remaining water in the connecting pipe is not provided. As a result, the phenomenon of freezing of the connector in winter frequently occurred.

    Therefore, in order to solve this problem, a drainage device was discharged to discharge water remaining in the water pipe of the fire hydrant, but when the drainage device was buried underground, soil, gravel, sand, etc. were introduced into the drainage device and blocked. The problem of loss of function has occurred and it has not been put to practical use. Therefore, the present applicant has devised and registered the utility model registration No. 20-296539, but it is difficult to install the fire hydrant stably when the elevation or the slope of the terrain is different, and there is a concern that the wastewater around the water may flow back. there was. In addition, a method for efficiently manufacturing a fire hydrant composed of a case, a roof, a bridge, and a support frame has not been proposed.

Therefore, an object of the present invention for solving the above problems is to embed the hydrant valve in the basement to supply water to the fire hose in the event of a fire in the basement to prevent the freezing and effectively extinguish the fire even in winter, water supply pipe Alternatively, it is possible to selectively connect to underground wells, and to provide a method of installing a fire hydrant that is simple to install and convenient to manufacture regardless of the terrain.

The present invention relates to a fire hydrant installation method, in the fire hydrant installation method consisting of a case, a door, a roof and a support frame, the support frame (12a, 12b) is installed at the lower end of the case 10, respectively, the respective support Frames 12a and 12b are embedded in the basement by a predetermined depth, and at this time, a second connecting pipe 26 is inserted into the support frame 12a, and inside another support frame 12b. A valve rod 20 having a handle 18 for opening and closing the hydrant valve 16 is inserted, and a heat insulating material 28 is filled in each of the supporting frames 12a and 12b. The hydrant valve 16 which is opened and closed by the valve rod 20 is installed at the lower part of the supporting frame 12b, and the water supply pipe 14 or the underground well is installed at the lower end of the hydrant valve 16. On one side, the first connecting pipe 22 is installed And, the T-shaped tube 24 is installed at the end of the first connecting pipe 22 and the second connecting pipe 26 described above flows into the first connecting pipe 22 through the water supply pipe 14. It is characterized in that the water can be smoothly supplied to the second connecting pipe (26).

Therefore, the present invention by embedding a fire hydrant valve in the basement to supply water to the fire hose in the event of a fire can effectively extinguish the fire even in the winter to prevent freezing, can be used selectively connected to the water supply pipe or underground pipes Regardless of terrain, there is a remarkable effect that is easy to install and convenient to manufacture.

1 is a perspective view of a conventional fire hydrant.
Figure 2 is a perspective view of a conventional fire hydrant drain trap.
3 is a cross-sectional view of a conventional fire hydrant drain trap.
Figure 4 is a cross-sectional view of the odor inflow prevention trap and waste water backflow trap formed in the hydrant outlet.
Figure 5 is a detailed view of the malodor inflow prevention trap formed on the first hydrant of the present invention.
Figure 6 is a detailed view of the expansion joint formed in the first hydrant pipe hydrant of the present invention.
Figure 7 is a detailed view installed with the odor inflow prevention trap and expansion joint pipe in the first hydrant of the present invention.
Figure 8 is a picture of the socket installed in the fire hydrant of the present invention.
9 is a detailed picture of the socket installed in the fire hydrant of the present invention.

The present invention relates to a fire hydrant installation method, in the fire hydrant installation method consisting of a case, a door, a roof and a support frame, the support frame (12a, 12b) is installed at the lower end of the case 10, respectively, the respective support Frames 12a and 12b are embedded in the basement by a predetermined depth, and at this time, a second connecting pipe 26 is inserted into the support frame 12a, and inside another support frame 12b. A valve rod 20 having a handle 18 for opening and closing the hydrant valve 16 is inserted, and a heat insulating material 28 is filled in each of the supporting frames 12a and 12b. The hydrant valve 16 which is opened and closed by the valve rod 20 is installed at the lower part of the supporting frame 12b, and the water supply pipe 14 or the underground well is installed at the lower end of the hydrant valve 16. On one side, the first connecting pipe 22 is installed And, the T-shaped tube 24 is installed at the end of the first connecting pipe 22 and the second connecting pipe 26 described above flows into the first connecting pipe 22 through the water supply pipe 14. It is characterized in that the water can be smoothly supplied to the second connecting pipe (26).

    In addition, the fire hydrant case is first put a stainless steel plate on the punching machine and perforated in the shape of the fire hydrant case, the perforated stainless steel plate is bent with an NC bending machine, after bending the case TIG argon welding to complete the case production, and the door and Each roof is welded separately, the stainless steel pipe is cut to make the support frame installed at the bottom, the two cut pipes are welded to the bottom of the case, and the reinforcing steel plate is reworked at the bottom for strength. Welding and bonding, and after welding the case and the door and the roof manufactured in the above process by bonding to each other, the rubber packing is assembled to the case first, and after measuring the size of the required acrylic plate to the size of the acrylic plate After cutting, print the necessary text on the cut acrylic plate and apply the printed acrylic plate. Assembled on the rubber gasket, and is characterized in that the assembly of the last locked-up is attached to the door handle.

    Fire hydrant installation method of the present invention can be largely three cases. The first is to connect the hydrant to the water supply, the second is to the underground well, and the third is to use a pressure pump. In the first case, the case of connection to water supply is described as follows.

    First, measure the pressure before installation of water supply to a pressure of 2kg / ㎠ or more. The yield is set to 150 l / min. In order to secure 150 l of water per minute, a sufficient amount of water can be secured if the pipe is 30 mm or more at a pressure of 2 kg / cm 2 and a pipe of 25 mm or more at a pressure of 4 kg / cm 2 or more. Installation method is to expose the pipe of water supply and use connection parts such as T, union, etc., and pipe it to the place where it will be installed in the case where the hose storage box is made by polyethylene water pipe, etc. Connect drain valve to make it possible.

    The connected drain valve is combined into the case leg so that the valve handle and the fire hose connection are installed inside the case. Fold three or five 40mm fire hoses and two pipes in the casing and store them inside the case.

    A shutoff valve is installed at the bottom of the water supply connection to increase the pressure when using a fire hydrant. Fire hydrant installation is installed one by one at intervals of 70 to 100 m so that local residents who have no experience of waterproofing can be waterproofed quickly by using only the stored hoses. When it extends, the pressure of 0.1 kg / cm <2> rises for every 1 m of water level differences, as opposed to the fire truck which pressure falls.

And the case locks for the management of the hose, etc. in case of emergency to make the front of the acrylic plate for quick use to use the acrylic plate after damage.

    In the case of using the underground pipe, which is the second installation method of the present invention, a pressure of about 3 kg / ㎠ is used when using 1 hp (800 W) of agricultural pumps installed on the ground, and 5 kg / ㎠ when using 2 hp (about 1600 W). Pressure comes out. In case of using submersible pump, high pressure is higher than ground pump, so if the pipe is more than 25mm, sufficient pressure and quantity can be secured. The method of installing a fire hydrant using the underground pipe is the same as the method of installing a fire hydrant using the tap water described above.If the distance between the pump and the fire hydrant is far, the pump switch line is connected to the hydrant and the pump is used in the hydrant when the hydrant is used. To make it work.

In the case of submersible pumps, the pumps are connected in parallel at the manual switch. At this time, the pipe window is a direct pipe window, so it is not waterproof when the pump is running, thereby preventing damage due to the overload of the pump. The hydrant valve, the existing valve and two valves are attached to the pump outlet to increase the pressure when using the hydrant, and when the hydrant is not used, the hydrant intake valve is shut off and the water inside the hydrant is automatically discharged through the drain valve. Do not become.

    Hydrant installation method using a pressurized pump, the third installation method of the present invention is the installation method of increasing the pressure by installing the pump when the water supply is sufficient to the water pipe is 30mm or more, but the pressure is not directly waterproof to 2kg / ㎠ or less to be. Since a pump of 1 horsepower usually comes out with a pressure of 3 kg / cm 2, a pump having a pressure of 1 horsepower or more can obtain sufficient pressure.

    The installation method is the same as the construction method of a fire hydrant using the underground pipe described above, and a shut-off valve is installed at the inlet of the pressurized pump and a drip valve is installed at the pump drain port to shut off only the shut-off valve when the fire hydrant is not used. Since the water of the pump and the pipe drainage is drained through the drip valve, the water of the pipe after the pump is automatically discharged through the drip valve installed in the drain valve, thus preventing freezing of the pump and the pipe, When the pump is opened and operated, the watertightness is quickly eliminated without replenishing the grease, and the drip valve is automatically shut off to prevent leakage and pressure loss into the pipe.

    And the inside of each support frame of the fire hydrant of the present invention is filled with a heat insulating material for preventing the freezing. The waterproofing port is installed inside the hose storage box, and the three hoses provided inside the hose storage box are folded in two layers so that the waterproofing hole, the hose and the window are connected and the hose storage box is locked for management and in the event of an emergency If the acripan is broken and the pipe is moved to the waterproofing point and the valve is opened, the hose connected by double layer is waterproof without twisting the hose. It can be done within one minute to extend and waterproof three (45m) hoses with one or two people.

    On the other hand, when the hydrant manufacturing method used in the present invention are described sequentially. First, in order to manufacture the case, which is the panel body, the punch is placed on a punching machine with STS 304 and 1.5mm thick stainless steel plates. Perforated stainless steel sheet is bent with an NC bending machine. After bending, the case is welded to TIG. And weld the door and the roof, respectively. And to cut the stainless steel pipe to manufacture a support frame installed on the bottom. Two cut pipes are welded to the bottom of the case and installed. And re-weld 2mm thick reinforcing steel plate at the bottom for strength reinforcement. The case, door and roof are welded together. Then, the rubber packing on the door is assembled to the body first, and after measuring the size of the required acrylic plate, cut the acrylic plate with blue transparent thickness 3mm to the size measured. The necessary text is printed on the cut acrylic plate. The printed acrylic plate is then assembled to the rubber packing of the door. Finally, the door handle with the locking device is assembled.

      Hereinafter, a detailed description of a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

    1 is a perspective view of a conventional hydrant, Figure 2 is a perspective view of a conventional hydrant drain trap, Figure 3 is a cross-sectional view of the conventional hydrant drain trap, Figure 4 is a odor inflow prevention trap and wastewater backflow trap formed in the present invention hydrant outlet 5 is a detailed view of the odor inflow prevention trap formed in the first hydrant first connecting pipe of the present invention, Figure 6 is a detailed view of the expansion pipe formed in the first connecting pipe of the present invention, Figure 7 is a first connection of the hydrant of the present invention The odor inflow prevention trap and the expansion pipe is installed in the pipe together with the detailed view, Figure 8 is a picture of the socket installed in the fire hydrant of the present invention, Figure 9 is a detailed picture of the socket is installed in the fire hydrant of the present invention.

1 is a view showing the overall shape of a conventional fire hydrant as shown in the drawings, the conventional fire hydrant 100 is largely composed of a case, a hydrant valve and a drain trap.

    The case 10 has a rectangular shape and a fire hose 70 is installed therein. Support frames 12a and 12b are respectively installed at the lower end of the case 10, and each of the support frames 12a and 12b is embedded in the basement by a predetermined depth. At this time, the second connecting pipe 26 is inserted into the support frame 12a, and inside the support frame 12b is provided with a handle 18 to open and close the hydrant valve 16 to be described later. One valve rod 20 is inserted. In addition, the insulating material 28 is filled in each of the support frames 12a and 12b to prevent freezing during winter.

    On the other hand, the hydrant valve 16 which is opened and closed by the valve rod 20 is installed in the lower portion of the support frame 12b buried underground. Water supply pipe 14 is installed at the lower end of the hydrant valve 16, the first connection pipe 22 is installed on one side.

    And the T-shaped tube 24 is installed at the end of the first connecting tube 22 and the second connecting tube 26 described above, the water introduced into the first connecting tube 22 through the water supply pipe 14. It can be smoothly supplied to the second connecting pipe (26).

On the other hand, the lower end of the T-shaped tube 24 is formed with a protruding tube 25 is formed with a threaded outer peripheral surface, the drainage trap 30 shown in Figs. 2 and 3 is coupled to the protruding tube 25.

    The configuration of the drain trap 30 is as follows. First, the distal end of the connecting cap 34 is screwed to the lower end of the protruding tube 25. At this time, a conventional O-ring 56 is inserted between the protruding pipe 25 and the connection cap 34 to prevent leakage.

    And the cap bolt 32 is screwed to the lower end of the connection cap 34. At this time, the aforementioned 0-ring 56 is inserted between the cap bolt 32 and the connecting cap 34.

    A plurality of outlets 52 are formed on the outer circumferential surface of the cap bolt 32, and a guide groove 38 is formed in the inner center thereof. In this case, a contact surface 48 inclined at a predetermined angle is formed at the tip end of the guide groove 38. The guide pin 40 having the disc 42 and the guide member 46 is inserted into the guide groove 38. At this time, the spring 50 is inserted into the outer circumferential surface of the guide member 46, the guide pin 40 can be moved up, down by the elastic force of the spring (50). And the coupling pipe 36 is fastened with a screw thread formed on the outer circumferential surface of the connection cap 34 configured as described above. A chamber 54 having a predetermined space is formed in the coupling pipe 36, and a discharge port 58 for discharging water to the outside is formed in the lower center. That is, the coupling pipe 36 is installed on the outer circumferential surface of the discharge trap so that soil, sand, gravel, etc. do not penetrate into the cap bolt 32 when buried underground so that a failure does not occur.

    Hereinafter, the operating state of the hydrant configured as described above will be described below. First, when a fire occurs, the user rotates the handle 18 installed on one side of the case 10 to open the hydrant valve 16, so that the water in the water supply pipe 14 embedded in the basement has a water pressure of 2 kg / cm 2 or more. Through the hydrant valve 16 through the first connecting pipe 22 is introduced into the T-type tube (24). At this time, the drain trap 30 installed at the lower end of the T-type tube 24 is automatically closed by the incoming water pressure so that water is introduced into the second connection tube 26 installed on the upper portion of the T-type tube 24. do.

    That is, more specifically, the water introduced into the T-shaped tube 24 is introduced into the drain trap 30 through the protruding tube 25 as shown in FIG. At this time, the guide pin 40 inserted into the guide groove 38 of the cap bolt 32 is lowered by the hydraulic pressure, and accordingly the protruding jaw of the disk 42 formed on the guide pin 40. As the 44 contacts the contact surface 48 of the guide groove 38, the guide groove 40 is blocked, so that water does not fall into the cap bolts 32 and the outlets 52 and 58 of the coupling pipe 36. It is to be introduced into the second connecting pipe 26 installed on the upper portion of the T-shaped tube (24). Since water is discharged through the fire hose 70 coupled to the second connecting pipe 26, it is possible to extinguish the fire initially.

    On the other hand, when the fire extinguishing is completed to rotate the handle 18 in the reverse direction, the hydrant valve 16 is closed to completely block the incoming water. At this time, the water that is not discharged remains in the first and second connection pipes 22 and 26, and the remaining water is discharged to the outside through the drain trap 30.

    That is, in detail, as shown in FIG. 3, the guide pin 40, which has been in contact with the contact surface 48 of the guide groove 38 by the water pressure, is rapidly dropped in water as the water is blocked. By the elasticity, the guide pin 40 is raised upward, so that the guide groove 38 is opened to allow residual water to flow therein. Thereafter, the water remaining in the first and second connecting pipes 22 and 26 through the plurality of outlets 52 formed in the cap bolt 32 and the outlet 58 of the coupling pipe 36 is freely dropped to drain traps. It will be discharged to the outside.

In other words, the water remaining in the first and second connecting pipes 22 and 26 due to the above action is quickly and safely, that is, discharged without being disturbed by soil, sand, gravel, etc. It is possible to prevent the freezing of the tube that occurs frequently in the.

And the present invention is the hydrant valve 16 and the valve rod 20 is coupled by the socket 110. A female thread is formed inside the socket, and a male thread is formed at each of the front end of the valve rod and the front end of the hydrant valve. Therefore, it is possible to select and use several valve rods of different lengths as needed when the terrain where the fire hydrant is installed is inclined or the rock is underground. In other words, any one of a plurality of valve rods having different lengths of the hydrant valve may be selected and coupled to the hydrant valve. Likewise, the T-type tube 24 and the second connection tube 26 may be coupled by the socket 110. In this case, any one of a plurality of second connecting pipes having different lengths may be combined. After connecting the fire hydrant valve and the valve rod to the socket, connect a plurality of fixing screws to the fixing screw holes formed on the outer periphery of the socket to make the connection more secure. In the embodiment of the present invention, the fastening using four fixing screws.

    In addition, the first connecting pipe 22 is provided with a expansion joint pipe 120. The expansion joint pipe 120 is to form a pleated portion in the middle of the first connecting tube 22, and the protective cover is separately covered on the pleated portion. In general, when installing a fire hydrant, when the ground is inclined or there is a rock in the basement, it is difficult to horizontally connect the second hydrant pipe connecting the hydrant valve and the T-shaped pipe horizontally, and thus, the upper valve rod or the second connection. The tube is not vertically fixed but tilted. However, if the expansion joint pipe of the present invention is installed in the middle of the first connection pipe, even though the hydrant valve and the T-shaped pipe are different in height, the expansion pipe is bent so that the valve rod or the second connection pipe is fixed vertically. will be.

In addition, the present invention is to install a first malodor backflow trap 130 in the first connecting pipe (22). The first malodor counterflow trap 130 is a function of removing the odor flowing back from the drain trap by placing a bent portion of the water in the middle of the first connecting pipe 22 is a straight pipe. Odor is blocked by the water's sealing action not to the water pipe.

And, the present invention is to install a waste water backflow prevention trap 150 at the lower end of the coupling pipe of the drain trap. The wastewater backflow prevention trap 150 is to install a drain plug 151 coupled to the hinge in the outlet 58 formed in the chamber, the drain plug 151 can open and close the hinge to the central axis, but the spring on the hinge And a stopper-mounted hinge structure, which is opened to the outside by the weight of water remaining in the first and second connecting pipes 22 and 26, and closed again by the force of the spring, but in a horizontal state. In the stopper is configured to no longer close in. Since the hinge structure uses a hinge installed in a general building door, detailed description thereof will be omitted. Therefore, the waste water outside the drain trap cannot enter the hydrant of the present invention. In other words, only water remaining in the first and second connection pipes 22 and 26 is discharged to the outside, and external waste water is not allowed to enter the inside. And the present invention is to install a second malodorous backflow prevention trap 140 in the lower portion of the wastewater backflow prevention trap (150). The second malodor counterflow trap 140 is composed of a convex top plate and a concave bottom plate that can contain water so as to block odors, so that water is automatically formed between the top plate and the bottom plate, so that the odor is directed toward the water supply pipe. To prevent backflow. Bongsu blocks the smell is the same as the first malodor counterflow trap.

Therefore, the present invention, in the fire hydrant installation method consisting of a case, a door, a roof and a support frame, each of the support frame (12a, 12b) is installed on the lower end of the case 10, the respective support frame (12a, 12b) Is buried underground is installed, the second connecting pipe 26 is inserted in the support frame 12a, the other side of the support frame 12b can open and close the hydrant valve 16 Inserting a valve rod (20) having a handle (18); Filling a heat insulating material (28) in the respective support frames (12a, 12b); Installing a hydrant valve (16) which is opened and closed by the valve rod (20) at the bottom of the support frame (12b); T-type tube 24 is connected to the lower portion of the second connecting tube 26, the first connection tube 22 is connected to one side of the T-type tube 24, the other side of the first connecting tube 22, the fire hydrant The valve 16 is connected and installed; Embedding the support frame (12b), the first connecting pipe (22), the T-type pipe (24) and the hydrant valve underground; Connecting the water supply pipe 14 or the underground pipe to the hydrant valve 16; .
And the fire hydrant case 10 is first put the stainless steel plate on the punching machine and perforated in the shape of the fire hydrant case, the perforated stainless steel plate is bent with an NC bending machine, after bending the case TIG argon welding to complete the case production, and The door and roof are welded separately, and the stainless pipe is cut to make the supporting frame installed at the bottom, and the two cut pipes are welded and joined at the bottom of the case. After re-welding and bonding the case manufactured by the process, the door and the roof by mutual welding, the rubber packing is assembled to the case in the case first, and after measuring the size of the required acrylic plate and measuring the acrylic plate After cutting to size, print the necessary text on the cut acrylic plate and print the printed acrylic plate. It is assembled to the rubber packing of the door, and finally, the door handle with the locking device is assembled.
Therefore, the present invention by buried a fire hydrant valve in the basement to supply water to the fire hose in the event of a fire can prevent the freezing and effectively extinguish the fire even in winter, can be selectively connected to the water supply pipe or underground pipe, Regardless of the terrain, there is a remarkable effect that is easy to install and convenient to manufacture.

10: Case 14: water pipe
16: Fire Hydrant Valve 18: Handle
20: valve rod 22: first connector
24: T-shaped tube 26: second connector
30: drain trap 32: cap bolt
34: connection cap 38: guide groove
40: guide pin 42: disk
44: protruding jaw 50: guide groove
54: chamber 100: fire hydrant
110: socket 120: expansion pipe
121: Bolt 130: 1st bad backflow prevention trap
140: 2nd bad smell backflow trap 150: wastewater backflow prevention trap
151: drain plug

Claims (2)

In the fire hydrant installation method consisting of a case, a door, a roof and a support frame,
Support frames 12a and 12b are respectively installed at the lower end of the case 10, and each of the support frames 12a and 12b is embedded in the basement, in which case there is a second inside the support frame 12a. A connecting rod 26 is inserted, and a valve rod 20 having a handle 18 for opening and closing the hydrant valve 16 is inserted into another support frame 12b;
Filling a heat insulating material (28) in the respective support frames (12a, 12b);
Installing a hydrant valve (16) which is opened and closed by the valve rod (20) at the bottom of the support frame (12b);
T-type tube 24 is connected to the lower portion of the second connecting tube 26, the first connection tube 22 is connected to one side of the T-type tube 24, the other side of the first connecting tube 22, the fire hydrant The valve 16 is connected and installed;
Embedding the support frame (12b), the first connecting pipe (22), the T-type pipe (24) and the hydrant valve underground;
Connecting the water supply pipe 14 or the underground pipe to the hydrant valve 16; Including but not limited to:
The fire hydrant case 10 first puts the stainless steel plate on the punching machine and perforated in the shape of the fire hydrant case, the perforated stainless steel plate is bent with an NC bending machine, and after bending, the case is completed by welding the case with TIG argon, and the door And roofs are welded separately, and stainless steel pipes are cut to make the support frame installed at the bottom, and the two cut pipes are welded and joined at the bottom of the case. Re-weld to join, and the case manufactured in the process, the door and the roof are welded to each other, the rubber packing on the door first assembled in the case, the required size of the acrylic plate and then measured the acrylic plate After cutting, print the necessary text on the cut acrylic plate and print the printed acrylic plate on the door. A fire hydrant installation method, comprising assembling to the rubber packing, and finally assembling the door handle attached to the lock. delete

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