JP4429002B2 - Branch connection pipe with float valve - Google Patents

Description

The present invention compactly installs a fire hydrant and an air valve of the same diameter in one valve box without impairing the functions of the water discharge function of the fire hydrant and the large-volume exhaust of the air valve, the large-volume intake function, and the exhaust function under pressure. The present invention relates to a branch connection pipe provided with a float valve body that makes it possible.

As is well known, conventionally, when a fire hydrant and an air valve are installed in correspondence with each other, a branch pipe integrally attached to a repair valve 10 installed at the lower part of the fire hydrant 100 as in Patent Document 1 A configuration in which the air valve 20 is connected to the portion 22 or a branch pipe portion 36 formed integrally with the valve box 35 of the fire hydrant 31 as in the fire hydrant 30 with an air valve shown in FIG. The air valve 32 is known to be configured to be connected. In the example shown in FIG. 5, reference numeral 37 indicates an opening / closing stopper mechanism for opening / closing a valve body 38 in the valve box 35.

As described above, in the case of the air valve 32 installed in the same valve chamber with respect to the fire hydrant 31, the diameter of the air valve itself is reduced because it is connected to the branch pipe portion 36 protruding from another product (normally 25 mm). In the following), there is a restriction on the mass exhaust function and the mass intake function as an air valve.

On the other hand, if a large-diameter air valve is installed in the immediate vicinity of the fire hydrant by branching the pipeline, connecting a fire engine or other pump to the base of the fire hydrant and sucking in more than the discharge amount of the fire hydrant A large amount of air intake function was performed by the valve, and excessive air flowed into the pipe and entered the pump through the fire hydrant, causing the pump to run idle and hindering fire fighting activities.

Utility Model Registration No. 3052006 (Summary, Fig. 1)

Therefore, the present invention has been made to solve the above-mentioned problems of the prior art, and particularly important elements are a small number of parts, an extremely simple structure, suitable for mass production, and economical. A branch connection pipe having a float valve body that is extremely advantageous from the viewpoint of water, and impairs the water discharge function of the fire hydrant and the large-volume exhaust, large-volume intake and under-pressure exhaust functions of the air valve. Therefore, the present invention provides a branch connection pipe having a float valve body that enables a fire hydrant and an air valve having the same diameter to be compactly installed in one valve box.

In order to achieve the above-mentioned object, the invention according to claim 1 is configured such that a strong water discharge device, which is a fire hydrant , is connected to the flow pipe and a separate air valve is provided for each fire hydrant. A branch connection pipe for connection, wherein the branch connection pipe includes valve box means, and the valve box means is a first flow path for connecting a flow path between the water distribution pipe and the fire hydrant. And a second flow path connecting the water distribution pipe and the air valve, and the first flow path is always in the first flow path in the valve box means. Is provided with a float valve body that is provided with a float valve body that closes the second flow path when the pipe is filled with water.

Further, in this invention, the invention according to claim 2 is a branch connection pipe provided with the float valve body according to claim 1, wherein the float valve body crosses the first flow path. Lies along the flow path direction of the first flow path and is guided so as to be movable between a lower point and an upper point, and closes the second flow path at the upper point. It is characterized by this.

Furthermore, in this invention, the invention according to claim 3 is a branch connection pipe provided with the float valve body according to claim 1 or 2, wherein the second flow path is the first flow path. The first groove and the annular groove flow path are provided with a common flow path valve seating surface that intersects the flow path. The float valve body is made of a disc-shaped ring member, and is in contact with the common flow path valve seat surface at the upper point to close the second flow path. To do.

Furthermore, in this invention, the invention according to claim 4 is a branch connection pipe provided with the float valve body according to any one of claims 1 to 3, wherein the float valve body is the float valve. Even when the body closes the second flow path, at least one air passage small hole is provided so as not to hinder the exhaust function under pressure of the air valve connected to the second flow path side. It is a feature.

According to the branch connection pipe provided with the float valve body according to the present invention, firstly, it has an extremely simple structure with a small number of parts and can be adapted for mass production. It can be said that it works extremely advantageously. Furthermore, the branch connection pipe provided with the float valve body according to the present invention is a fire hydrant without impairing the water discharge function of the fire hydrant, and the functions of the large amount exhaust function, the large amount intake function and the pressure exhaust function of the air valve. In addition, the air valve having the same diameter as that of the pipe can be installed in the same valve chamber in a compact manner. It can be said that this prevents the foreign matter mixed into the air valve from entering the air valve connected to the second flow path and works extremely effectively to prevent malfunction due to the foreign matter biting of the air valve.

Furthermore, according to the branch connection pipe provided with the float valve body according to the present invention, even when suctioning is performed in excess of the discharge amount of the fire hydrant, the float is caused to flow by the buoyancy of the float valve body and the flow rate of water. By maintaining the closed state of the passage, it is possible to maintain the state where the air valve side passage is blocked, prevent air from flowing into the fire hydrant side conduit, and do not hinder the suction by the pump It can be said that this works very effectively.

Hereinafter, the branch connection pipe provided with the float valve body according to the present invention will be described in detail based on specific embodiments shown in the drawings. FIG. 1 is a schematic side view showing, in section, a specific configuration example in which a fire hydrant and an air valve are installed in a water distribution pipe using a branch connection pipe having a float valve body according to the present invention. FIG. 2 is a schematic sectional view showing an operation mode of the branch connection pipe provided with the float valve body according to the present invention, and showing a mode when the inside of the pipe is in an anhydrous state. 3 is a schematic cross-sectional view showing an aspect when the inside of the pipeline is filled (full). FIG. 4 shows a specific example of a float valve body arranged in the branch connection pipe. FIG. 4A is a schematic view of a float valve body having a plurality of small air passage holes. FIG. 4B is a schematic perspective view of a float valve body formed of one air passage small hole.

A branch connection pipe 1 having a float valve body according to the present invention has a strong water discharge device 21 such as a fire hydrant disposed on a pipe of a water distribution pipe 23, for example, a repair valve device 24 (the repair valve device is schematically shown in FIG. 1). (Shown as a block diagram), and used for connecting individual air valves 22 for each hydrant 21 and configured as a single member. is there.

This branch connection pipe 1 is constituted by a valve box means 2 which regulates a valve box main body 3 and a storage chamber 4 for a float valve body to be described later in the valve box main body 3. And a regulating member 5 to be made. The valve box body 3 in the valve box means 2 is provided with a first flow path 6 penetrating in the vertical direction. The first flow path 6 has a lower end side inlet port 7 and an upper end side outlet port 8, and the lower end side inlet port 7 side is, for example, a pipe of the distribution pipe 23 via the repair valve device 24. A flow path is connected on the road, and the fire hydrant 21 is connected to the upper end side outlet 8 side. A channel hole 9 comparable to the first channel 6 is provided for the regulating member 5.

Furthermore, the valve box body 3 in the valve box means 2 is provided with a second flow path 10 that connects the water distribution pipe 23 and the air valve 22 with each other. The second flow path 10 has a lower end side inlet 11 and an upper end side outlet 12, and an air valve 22 is connected to the upper end side outlet 12 side. In this invention, the lower end side inlet 11 in the second flow path 10 includes an annular groove flow path 13 formed in an annular shape around the first flow path 6. The flow path 6 and the annular groove flow path 13 are configured to open at a common flow path valve seat surface 14 that intersects these flow paths.

On the other hand, in the present invention, the float valve body 15 is made of a material having a specific gravity of less than 1, and is constituted by a disk-shaped ring member having a flow path hole 16 comparable to the first flow path 6. Yes. The float valve body 15 lies in the storage chamber 4 along the direction intersecting the first flow path 6, and the lower point P ₁ and the upper point P are aligned along the flow path direction of the first flow path 6. ₂ is guided so as to be movable between the _two . The float valve body 15 is configured to abut against the common flow path valve seat surface 14 at the upper point P ₂ and close the second flow path 10.

The float valve body 15 hinders the exhaust function under pressure of the air valve 22 connected to the second flow path 10 side even when the float valve body 15 closes the second flow path 10. In order to prevent this, at least one air passage small hole 17 is provided as shown in each figure of FIG. The air passage small holes 17 are through holes, and a plurality of the air passage small holes 17 corresponding to the annular groove channel 13 may be provided as shown in FIG. 4A, for example. Only one such as shown in 4B may be provided.

FIG. 1 is a schematic side view showing, in section, a specific configuration example in which a fire hydrant and an air valve are installed in a water distribution pipe using a branch connection pipe having a float valve body according to the present invention. It is. FIG. 2 is a schematic sectional view showing an operation mode of the branch connection pipe provided with the float valve body according to the present invention, and showing a mode when the inside of the pipe is in an anhydrous state. FIG. 3 is a schematic cross-sectional view showing an aspect when the inside of the pipeline is full (full). FIG. 4 shows a specific example of a float valve body arranged in the branch connection pipe. FIG. 4A is a schematic view of a float valve body having a plurality of small air passage holes. FIG. 4B is a schematic perspective view of a float valve body formed of one air passage small hole. FIG. 5 is a schematic side view showing a configuration example of a conventional fire hydrant with an air valve.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Branch connection pipe provided with float valve body 2 Valve box means 3 Valve box main body 4 Storage chamber 5 for float valve body Restricting member 6 First flow path 7 Lower end side inlet 8 of the first flow path 1st Upper flow outlet 9 of the flow path 9 Flow path hole 10 of the restricting member Second flow path 11 Lower flow path side inlet 12 of the second flow path 12 Upper flow path side of the second flow path 13 Annular groove flow path 14 Road valve seat surface 15 Float valve body 16 Flow hole 17 of the float valve body Air passage hole P ₁ Lower point P ₂ Upper point 21 Powerful water discharge device 22 such as a fire hydrant 22 Air valve 23 Water distribution pipe 24 Repair valve device

Claims (4)

A branch connection pipe for connecting a powerful water discharge device, which is a fire hydrant , on the pipe of the water distribution pipe, and for connecting individual air valves for each fire hydrant, wherein the branch connection pipe includes a valve box means. The valve box means includes a first flow path connecting a flow path between the water distribution pipe and the fire hydrant, and a second flow path connecting a flow path between the water distribution pipe and the air valve. In the first flow path in the valve box means, the first flow path is always kept open and the second flow path is closed when the pipe is filled with water. A branch connection pipe provided with a float valve body, wherein a float valve body is provided. The float valve body lies along a direction intersecting the first flow path, and is guided so as to be movable between a lower point and an upper point along the flow path direction of the first flow path. The branch connection pipe having a float valve body according to claim 1, wherein the second flow path is closed at the upper point. The second channel includes an annular groove channel formed in an annular shape around the first channel, and the first channel and the annular groove channel are connected to the channel. Intersecting common flow path valve seat surfaces, wherein the float valve element is made of a disk-shaped ring member, abutting against the common flow path valve seat surface at the upper point, and The branch connection pipe provided with the float valve body according to claim 1 or 2, characterized in that the flow path is closed. The float valve body includes at least one so as not to disturb an exhaust function under pressure of an air valve connected to the second flow path side even when the float valve body closes the second flow path. The branch connecting pipe provided with the float valve body according to any one of claims 1 to 3, wherein an air passage small hole is provided.

Images