TWI589754B - A hydrant assembly with check valve - Google Patents

Description

Fire hydrant assembly with check valve

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a hydrant assembly having a check valve, and more particularly to a structure for improving the construction of a check valve buried in the ground in a simple manner. The hydrant assembly of the check valve.

The present invention relates to an improvement of Korean Patent Registration No. 10-0949366. In Korean Patent Registration No. 10-0949366, it is disclosed that, as shown in FIG. 1a, if a gate valve (70) is opened, the lift pipe (40) rises due to the water pressure of the fire water. And the fire water is sprayed. If the water gate valve (70) is closed after the fire hydrant is used, the fire water remaining inside the elbow pipe (20) and the lift pipe (40) is controlled by the check valve (80). ) and discharged to the outside.

The check valve (80) is closed by the water pressure as shown in FIG. 1b when the water gate valve (70) is opened, and is opened as shown in FIG. 2b when the water gate valve (70) is closed. The fire water remaining in the lift pipe (40) and the bend pipe (20) is discharged to the outside.

However, the disclosed invention produces the following situation: as shown in Figures 1b and 2b. In addition, the check valve (80) is welded and fixed to the elbow (20), and the check valve (80) is blocked by the inflow of impurities into the check valve (80), and the valve is inoperable.

In this case, in order to replace the check valve (80), it is necessary to excavate the troublesome work of the buried bent pipe (20) and the fixed pipe (30).

[Advanced technical literature]

[Patent Literature]

(Patent Document 1) Korean Patent Registration No. 10-0949366

The present invention has been made in order to solve the above-described problems, and an object of the invention is to provide a fire hydrant assembly having a check valve having a structure in which a replacement operation of a check valve buried in the ground is simplified.

The present invention which achieves the above object is a fire hydrant assembly having a check valve, characterized in that it has a water pipe which supplies fire water according to opening and closing of a water gate valve which is buried in the ground; and an elbow which is connected to the water pipe a fixed pipe connected to the curved pipe; a lifting pipe coupled to the fixed pipe to be exposed to the ground, and a guide block that is slidable on an inner surface of the fixed pipe at a lower end portion; a plate coupled to the upper end portion of the fixed pipe to prevent detachment of the lift pipe; a head block connected to an upper end portion of the lift pipe and having a hose connected to a fire hose a port; a valve device that opens and closes a lower end portion of the lift pipe; and a check valve connected to the elbow, closed when the water gate valve is opened, and opened when the water gate valve is closed, thereby Externally discharging fire water remaining in the lift pipe and the bent pipe; and forming a female screw hole in the bent portion of the bent pipe, the check valve is formed on the outer peripheral surface of the body to be coupled to the internally threaded hole a male screw portion, wherein an upper end portion of the main body is located inside the curved pipe, and a wrench coupling groove that is coupled to a wrench is formed at the upper end portion, and a flow into the fire fighting water is formed at an upper end portion of the main body The inlet, the lower end portion of the body is located outside the curved pipe, and forms a water outlet for discharging the fire water.

Furthermore, in the fire hydrant assembly of the present invention, a ball joint hole is formed in a side wall of the wrench coupling groove, and the wrench has a coupling ball, and the joint ball is supported by a spring elastic force to be elastically coupled to the above The ball joins the hole.

Furthermore, the assembly of the present invention further has a protective tube having an upper end portion coupled to the upper end portion of the curved tube and a lower end portion located lower than the check valve to protect the check valve from the buried soil. Impact.

The invention is to screw the check valve (80) to the elbow (20), so that even if the buried elbow (20) and the fixed pipe (30) are not dug, the wrench (100) can be realized. Replacement of check valve (80).

Furthermore, after the threaded joint of the check valve (80) is separated from the curved pipe (20) by the wrench (100), the ball (101) is coupled to the ball joint hole (87), and the check valve (80) is pressed. It is not possible to lift the wrench (100) and lift it, so that the replacement of the check valve (80) becomes easy.

Further, since the protective tube (200) is provided, it is possible to prevent the valve (80) from being clogged due to the landfill, and the replacement cycle can be extended.

10‧‧‧ water pipes

20‧‧‧Bend

21‧‧‧Threaded hole

30‧‧‧Fixed tube

31‧‧‧Closed board

40‧‧‧ Lifting tube

41‧‧‧ Guide block

50‧‧‧ head block

51‧‧‧Hose connection

60‧‧‧ valve body

61‧‧‧Action rod

62‧‧‧Hands

70‧‧‧Water gate valve

80‧‧‧ check valve

82‧‧‧Water outlet

83‧‧‧ Moving shaft tube

83a‧‧‧ slotting

84, 102‧‧ ‧ spring

85‧‧‧External thread

86‧‧‧Wrench joint groove

87‧‧‧Ball joint hole

90‧‧‧ gas valve

100‧‧‧ wrench

101‧‧‧ combined ball

110‧‧‧Fire hydrant slot

200‧‧‧protective tube

300‧‧‧Fire hose

Figure 1a is a cross-sectional view showing a prior art hydrant assembly.

Figure 1b is a cross-sectional view showing the check valve of Figure 1a.

Figure 2a is a cross-sectional view of a prior hydrant assembly.

Figure 2b is a cross-sectional view showing the check valve of Figure 2a.

3 to 5 are cross-sectional views showing a fire hydrant assembly according to an embodiment of the present invention.

Fig. 6 is a schematic view showing a state in which the check valve is separated.

Fig. 7 is a photograph showing a main part of a fire hydrant assembly of the present invention.

8a, 8b, and 8c are cross-sectional views and photographs showing the check valve.

The hydrant assembly according to the embodiment of the present invention has a structure that is improved in a manner that the replacement operation of the check valve is simplified. The check valve is used to discharge the residual water to the outside after the fire water is used in the event of a fire. Fire water in underground pipes to prevent cracking or corrosion.

Referring to Figs. 3 to 6 showing a fire hydrant assembly according to an embodiment of the present invention, the fire hydrant assembly has a water pipe (10) for supplying fire water according to opening and closing of a water gate valve (70) buried in the ground. a right angle bend pipe (20) connected to the water pipe (10); a fixed pipe (30) connected to the elbow (20); and a lift pipe (40) exposed to the fixed pipe (30) a guide block (41) sliding on the inner surface of the fixed tube (30) is coupled to the ground at the lower end portion; and a sealing plate (31) coupled to the upper end portion of the fixed tube (30) to prevent the lifting tube ( 40) detachment; a head block (50) connected to the upper end of the lift pipe (40) and having a connection a hose connection port (51) of the fire hose (300); and a valve device that opens and closes a lower end portion of the lift pipe (40).

The valve device has a valve body (60) that is in close contact with the lower end portion of the lift pipe (40) or separated from a lower end portion of the lift pipe (40); an actuating rod (61) whose lower end is coupled to the valve a body (60), the upper end portion is rotatably supported by the head block (50) to be movable up and down; and a handle (62) coupled to the upper end portion of the actuating lever (61) to actuate the actuating lever (61) Rotate.

The water gate valve (70) is connected to the ground and can be opened and closed by another opening and closing device (not shown), and a part of the water pipe (10), the elbow (20), and the fixed pipe (30) is buried in the ground and fixed. The upper end of the tube (30) is protruded toward the fire hydrant groove (110) on the ground.

The airtight plate (31) has an air valve (90) that opens and closes by exhausting or sucking air between the fixed pipe (30) and the lift pipe (40).

Furthermore, a check valve (80) is detachably coupled to the elbow (20), and is closed when the sluice gate valve (70) is opened, and the sluice gate valve is closed. (70) When it is closed, it is opened to discharge the fire water remaining in the lift pipe (40) and the bend pipe (20) to the outside.

The check valve (80) is detachably coupled to the elbow (20) according to the following configuration.

Referring to Figs. 6 and 8, a female screw hole (21) is formed in the bent portion of the elbow (20).

An outer thread portion (85) coupled to the female screw hole (21) is formed on an outer peripheral surface of the body of the check valve (80), and an upper end portion of the body is located at the curved portion An inner side of the tube (20) is formed with a wrench coupling groove (86) that is coupled to the wrench (100), and an inlet (81) for flowing the fire water is formed at an upper end portion of the body, and a lower end portion of the body A water outlet (82) for discharging the fire water is formed outside the curved pipe (20).

On the other hand, on the side wall of the wrench coupling groove (86), a ball coupling hole (87) is formed, and the wrench (100) has a coupling ball (101) which is elastically driven by the spring (102). Supported to be elastically bonded to the above ball coupling hole (87).

Therefore, the check valve (80) can be assembled to the elbow (20) or separated from the elbow (20) by the rotation of the wrench (100), and the valve (80) can be stopped by the wrench (100). After the thread is combined with the bent pipe (20), since the coupling ball (101) is coupled to the ball coupling hole (87), the check valve (80) does not fall off from the wrench (100) and can be pulled.

Referring to Fig. 8, the check valve (80) is formed with an inflow port (81) connected to the elbow (20) and a water outlet (82) for discharging the fire water, inside the check valve (80), The head is formed with a slit (83a) for allowing fire water to pass therethrough, and a moving shaft tube (83) for opening and closing the water outlet (82) is coupled to the end, and the moving spool (83) is opened. A spring (84) that moves in the direction of the nozzle (82).

On the other hand, in the above-mentioned elbow (20), in combination with the protection tube (200) for protecting the above-mentioned check valve (80) from the buried soil, the lower end portion of the protection tube (200) is located above the check valve (80) is further lower to prevent the water discharge port (82) of the check valve (80) from being blocked by the landfill.

The operation of the fire hydrant assembly having the above configuration is as follows.

Referring to Figure 3, when using the fire hydrant, open the cover fire hydrant slot (110) After the cover (not shown), the water gate valve (70) is opened. At this time, as shown in FIG. 4, the valve body (60) and the lift pipe (40) rise with respect to the fixed pipe (30) due to the water pressure of the supplied fire water, and the head block (50) protrudes toward the ground.

At this time, if the opening and closing amount of the air valve (90) is adjusted, the rising speed of the lift pipe (40) that rises due to the water pressure can be adjusted. That is, the rising speed of the lift pipe (40) can be adjusted by adjusting the discharge speed of the air existing in the space between the fixed pipe (30) and the lift pipe (40). Therefore, it is possible to prevent the sudden rise of the lift pipe (40) caused by the high-pressure fire water and prevent a safety accident.

As shown in FIG. 5, after the fire hose (300) is connected to the hose connection port (51) in the state as described above, the valve body is driven by the operating lever (61) by rotating the handle (62) ( 60) When descending, the lower end of the lift pipe (40) is opened and the fire water is sprayed through the fire hose (300).

On the other hand, the check valve (80) is closed during the discharge of the fire water. That is, as shown in FIG. 5 and FIG. 8a, if the high-pressure fire-fighting water flows in through the inflow port (81), the moving shaft tube (83) compresses the spring (84) on the one hand, and moves on the one hand, thereby closing the water outlet (82). And block the outflow of fire water.

After the hydrant is used, the water gate valve (70) is closed and the head block (50) is pressurized downward to bond the lift pipe (40) to the inner side of the fixed pipe (30). At this time, the air valve (90) is opened to allow the outside air to flow between the fixed pipe (30) and the lift pipe (40), whereby the lowering of the lift pipe (40) becomes smooth.

If the lowering of the lift pipe (40) is completed, and the fire water remaining inside the lift pipe (40) after a fixed time passes completely through the check valve (80), the handle (62) is rotated and the valve body (60) ) Close the lower end of the lift pipe (40).

At this time, if the water gate valve (70) is closed, the check valve (80) is opened. The fire water remaining in the lift pipe (40) and the bend pipe (20) flows out. That is, as shown in Fig. 8b, the higher pressure of the fire water is released, whereby the shaft tube (83) is moved by the restoring force of the spring (84), thereby opening the water outlet (82). At this time, the fire water passing through the inflow port (81) flows out to the water outlet (82) through the slit (83a).

On the other hand, in use, the inflow port (81) of the check valve (80) is closed due to impurities or the like, and the operation of replacing the defective check valve (80) is as follows.

Referring to Fig. 6, first, the sealing plate (31) is separated from the fixed pipe (30), thereby separating the head block (50), the lifting pipe (40), and the operating lever (61).

Next, the wrench (100) is coupled to the wrench coupling groove (86) of the check valve (80) to be rotationally separated.

At this time, after the threaded joint of the check valve (80) is separated from the curved pipe (20) by the wrench (100), the ball (101) is coupled to the ball joint hole (87), and the check valve is closed. (80) It is not possible to lift the wrench (100) and lift it, so that the replacement of the check valve (80) can be realized.

Therefore, according to the present invention, the replacement operation of the check valve (80) can be realized even if the bent pipe (20) and the fixed pipe (30) are not dug.

10‧‧‧ water pipes

20‧‧‧Bend

21‧‧‧Threaded hole

30‧‧‧Fixed tube

31‧‧‧Closed board

40‧‧‧ Lifting tube

41‧‧‧ Guide block

50‧‧‧ head block

51‧‧‧Hose connection

60‧‧‧ valve body

61‧‧‧Action rod

62‧‧‧Hands

70‧‧‧Water gate valve

80‧‧‧ check valve

85‧‧‧External thread

86‧‧‧Wrench joint groove

87‧‧‧Ball joint hole

90‧‧‧ gas valve

110‧‧‧Fire hydrant slot

200‧‧‧protective tube

Claims (3)

A fire hydrant assembly having a check valve having a water pipe (10) for supplying fire water according to opening and closing of a water gate valve (70) buried in the ground; and a bend pipe (20) connected to the water pipe (10); a fixed pipe (30) connected to the elbow (20); a lifting pipe (40) coupled to the fixed pipe (30) to be exposed on the ground, and coupled to the fixed pipe at the lower end ( 30) an inner sliding guide block (41); a sealing plate (31) coupled to the upper end portion of the fixed tube (30) to prevent detachment of the lifting tube (40); a head block (50), Connected to an upper end portion of the lift pipe (40), and has a hose connection port (51) connected to the fire hose (300); a valve device that opens and closes a lower end portion of the lift pipe (40); and a check valve ( 80), which is connected to the elbow (20), is closed when the water gate valve (70) is opened, and is opened when the water gate valve (70) is closed, thereby discharging the residual pipe (40) and the bend to the outside. a fire water for the tube (20); and an internal threaded hole (21) formed in the bent portion of the elbow (20), the check valve (80) being formed on the outer peripheral surface of the body to be coupled to the internally threaded hole (21) The external thread portion (85), the upper end portion of the body is located inside the curved tube (20), and at the upper end portion, a wrench coupling groove (86) that is coupled to the wrench (100) is formed at the upper end of the body The inlet portion (81) that flows into the fire-fighting water is formed, and the lower end portion of the body is located outside the curved pipe (20), and a water outlet (82) for discharging the fire-fighting water is formed. A fire hydrant assembly having a check valve according to claim 1, wherein a ball coupling hole (87) is formed on a side wall of the wrench coupling groove (86), and the wrench (100) has a coupling ball ( 101), the bonding ball (101) is elastically supported by a spring (102) to be elastically coupled to the ball coupling hole (87). A fire hydrant assembly having a check valve according to claim 1 or 2, further comprising a protection tube (200), the protection tube (200) having an upper end coupled to the elbow (20) The upper end portion and the lower end portion are located lower than the check valve (80) to protect the check valve (80) from the landfill.