JP3137784U - Fire hydrant valve - Google Patents

Abstract

A screw-type fire hydrant valve capable of connecting fire hoses with different diameters of connection fittings is provided.
A male screw 12 is formed on the outer periphery of a tip end of a hose connection tube 8 connected to a fire-extinguishing liquid outlet 6 of a valve body 2 so that a connection fitting 11 of a small-diameter fire hose 10 is screwed together. The movable connecting cylinder 9 is attached to the outer side of the hose connecting cylinder 8 so as to be able to move in the axial direction so that the outer side of the male screw 12 can be covered with the hose connecting cylinder 8 positioned. A male screw 13 for screwing and connecting the connecting fitting 11a of the large-diameter fire hose 10a is provided on the outer peripheral tip side of the outer periphery.
[Selection] Figure 1

Description

  The present invention relates to a screw-type fire hydrant valve capable of connecting fire hoses having different diameters.

  Generally, a screw-type fire hydrant valve is provided with a hose connection tube at the outlet of the fire extinguishing liquid (water) of the valve body attached to the end of the water supply pipe, and on the outer peripheral surface of the tip of the hose connection tube, at the end of the fire hose. The valve mechanism provided on the valve body is opened with a male screw threaded to externally engage the connecting fitting provided, with the end of the fire hose connected to the hose connection tube by screw connection. By discharging, water discharge from the fire hose becomes possible.

  By the way, the screw type fire hydrant valve has a structure in which a male screw for screwing and connecting a hose connection fitting having a specific diameter is provided on the outer peripheral surface of the tip of the hose connection cylinder. If the diameter of the connection fitting of the fire hose that has been carried to the outside does not match the male screw, the fire hose cannot be connected to the fire hydrant valve, and there is a problem that fire fighting activities cannot be performed due to water discharge.

  Then, the subject of this invention is providing the screw-type fire hydrant valve which can connect the fire hose from which the diameter of a connection metal fitting differs.

  In order to solve the above problems, the present invention provides a hose connection tube at the extinguishing liquid outlet of the valve body, and forms a male screw for screwing and connecting a small-diameter fire hose connection fitting to the outer periphery of the tip of the hose connection tube. A movable connecting cylinder is attached to the outside of the hose connection cylinder so that it can be moved in the axial direction and can cover the outside of the male screw in a state of being positioned on the tip side of the hose connection cylinder. A configuration is adopted in which a male screw for screwing and connecting a connection fitting of a large-diameter fire hose is provided on the outer peripheral tip side of the movable connecting cylinder.

  The movable connecting cylinder covers the male screw of the hose connecting cylinder in a state where the moving range in the axial direction is located on the distal end side of the hose connecting cylinder, and the hose connecting cylinder is positioned on the root side of the hose connecting cylinder. It is set so that the male screw of the connecting tube is exposed, and the movable connecting tube and the hose connecting tube are arranged so that the distal end surfaces of the movable connecting tube and the hose connecting tube are flush with the movable connecting tube positioned on the distal end side of the hose connecting tube. It can be set as the structure currently formed.

  Moreover, it is good also as a structure which provided the water stop seal between the fitting surfaces of the said hose connection cylinder and a movable connection cylinder.

  Here, the valve body houses therein a valve mechanism that opens and closes by operating a handle, and is attached by connecting a fire-extinguishing liquid inlet provided at a lower part to a water supply pipe, and a fire hose on a hose connection cylinder or a movable connection cylinder By opening the valve mechanism with the end of the pipe connected, water discharge from the fire hose becomes possible.

  The hose connection cylinder is composed of a mounting cylinder screwed to the fire extinguishing liquid outlet of the valve body and a connection cylinder main body screwed to the tip of the mounting cylinder. A male screw having an outer diameter to be externally fitted and screwing and connecting a connection fitting of a small-diameter fire hose is formed on the outer peripheral surface of the distal end portion of the connection cylinder main body.

  The movable connecting tube is fitted over the mounting tube and the connecting tube main body of the hose connecting tube, has an outer diameter to which the connecting fitting of the large-diameter fire hose is fitted, and the large-diameter fire hose is connected to the outer peripheral surface of the tip. A male screw for screwing the metal fitting is formed, and the inner diameter of the movable connecting cylinder is a small-diameter portion that fits into the mounting cylinder on the rear end side, and the front end is externally fitted to the male screw provided on the connecting cylinder main body. It consists of a large-diameter portion, and the water-stop seal is incorporated in a circumferential groove provided on the outer peripheral surface of the connecting tube main body, and is in pressure contact with the large-diameter portion of the movable connecting tube.

  According to this device, a male screw for screwing and connecting a small-diameter fire hose connection fitting is formed on the outer periphery of the tip of the hose connection cylinder, and a large-diameter fire fighting is provided on the outer periphery of the movable connection cylinder provided outside the hose connection cylinder. Since a male screw is provided to threadably connect the hose connection fittings, it is possible to connect a fire hose with a connection fitting of a different size, and the fire hose brought to the fire site is a large diameter fire hose and a small diameter fire hose. In either case, it can be connected to a screw-type fire hydrant valve, so that a fire hose selection error does not occur, and fire extinguishing activities can be performed by quickly discharging water.

  In addition, with the movable connecting tube positioned on the tip side of the hose connecting tube, both tip surfaces are formed to be the same surface, so even if the fire hose is connected to either the movable connecting tube or the hose connecting tube In addition, it is possible to obtain a connection in which the packing incorporated in the hose connection metal fitting is pressed against the distal end surface of the movable connection tube or the hose connection tube, and the occurrence of water leakage at the hose connection portion can be prevented.

  Further, by moving the movable connecting cylinder to the rear end side, the small diameter fire hose can be connected to the male screw of the hose connecting cylinder without any trouble.

  Furthermore, since the water stop seal is provided between the fitting surfaces of the hose connection cylinder and the movable connection cylinder, it is possible to reliably prevent the occurrence of water leakage from the connection portion when a large-diameter fire hose is connected to the movable connection cylinder. .

  Hereinafter, embodiments of the present invention will be described based on illustrated examples.

  As shown in FIG. 1A, the screw-type fire hydrant valve 1 houses a known valve mechanism that opens and closes by operating the upper handle 3 in the valve body 2 and has a fire-extinguishing liquid inlet 4 provided at the lower part. Is connected to the water supply pipe 5, a fire extinguishing hose connection mechanism 7 is provided in the cylindrical fire-extinguishing liquid outlet 6 provided around the valve body 2, and the end of the fire hose is connected to the connection mechanism 7. By opening the valve mechanism, water discharge from the fire hose is possible.

  The fire hose connection mechanism 7 includes a hose connection tube 8 connected to the fire-extinguishing liquid outlet 6 of the valve main body 2 and a movable connection tube externally fitted to the outside of the hose connection tube 8 so as to be movable in the axial direction. 9, a male screw 12 is formed on the outer periphery of the distal end portion of the hose connecting cylinder 8 by screwing and connecting the metal fitting 11 of the small diameter fire hose 10 and a large diameter fire hose 10a is formed on the outer peripheral tip side of the movable connecting cylinder 9. A male screw 13 is formed to threadably connect the connection fitting 11a.

  As shown in FIGS. 2 (a) and 2 (b), the hose connection cylinder 8 includes a mounting cylinder 8a having a rear end screwed into the fire extinguishing liquid outlet 6 of the valve body 2, and a front end in the mounting cylinder 8a. The mounting cylinder 8a is a short cylinder and is provided with a stopper step 14 for restricting the backward movement of the movable connecting cylinder 9 on the outer peripheral surface near the rear end. Yes.

  The connecting cylinder body 8a is a cylinder having an outer diameter to which the connecting fitting 11 of the small-diameter fire hose 10 is externally fitted, and a male screw 12 is formed on the outer peripheral surface of the distal end portion. Has been.

  The movable connecting tube 9 is fitted over the mounting tube 8a and the connecting tube main body 8b in the hose connecting tube 8 and has an outer diameter to which the connecting fitting 11a of the large-diameter fire hose 10a is fitted. A plurality of protrusions 15 are provided to be held in a non-rotating shape by a hand or a tool, and a male screw 13 is formed on the outer peripheral surface of the distal end portion for screwing and connecting the connection fitting 11a of the large-diameter fire hose 10a.

  The inner diameter of the movable connecting cylinder 9 is composed of a small-diameter portion whose rear end is fitted to the mounting cylinder 8a and a large-diameter portion whose outer end is externally fitted to the male screw 12 provided on the connecting cylinder main body 8b. A water stop seal 17 is incorporated in the circumferential groove of the ridge 16 provided on the outer peripheral surface of the main body 8b, and press-contacts with the inner peripheral large diameter portion of the movable connecting cylinder 9, whereby the hose connecting cylinder 8 and the movable connecting cylinder 9 are The fitting portion is kept watertight.

  The movable connecting cylinder 9 covers the male screw 12 of the hose connecting cylinder 8 in a state where the moving range in the axial direction is positioned on the distal end side of the hose connecting cylinder 8, and is positioned on the base side of the hose connecting cylinder 8. 2 and the hose connection cylinder 8 is set so that the male screw 12 of the hose connection cylinder 8 is exposed. The movable connection cylinder 9 and the hose connection cylinder 8 are connected to the hose connection cylinder 8 as shown in FIG. The distal end surfaces of the movable connecting cylinder 9 and the hose connecting cylinder 8 are positioned on the distal end side and the stepped portion formed between the small diameter part and the large diameter part on the inner diameter of the movable connecting cylinder 9 is in contact with the protrusion 16. They are formed to be on the same plane.

  In the illustrated example, the fire hose connection mechanism 7 protrudes horizontally with respect to the valve body 2. However, the connection mechanism 7 may protrude in an inclined shape with an upward or downward angle. .

  The fire hydrant valve 1 of the present invention is configured as described above, and FIG. 1A shows a state before the small-diameter fire hose 10 of the fire hydrant valve 1 is connected. The male screw 12 provided at the tip of the hose connection cylinder 8 is exposed at the rear end side.

  In this state, if the connection fitting 11 provided at the end of the small-diameter fire hose 10 faces the tip of the hose connection tube 8 and this connection fitting 11 is externally screwed to the male screw 12 of the hose connection tube 10, As shown in FIG. 2 (a), the small-diameter fire hose 10 can be connected to the tip of the hose connection cylinder 8. By opening the valve mechanism with the handle 3, water discharge from the small-diameter fire hose 10 becomes possible.

  Further, when the connection fitting is screwed into the male screw 12, the packing 18 incorporated in the connection fitting comes into pressure contact with the distal end surface of the hose connection cylinder 8, and the occurrence of water leakage from the connection portion is prevented.

  Next, FIG. 2 (b) shows a state before the large-diameter fire hose 10 a of the fire hydrant valve 1 is connected. The movable connecting cylinder 9 is positioned on the distal end side of the hose connecting cylinder 8. The movable connecting cylinder 9 is covered with a male screw 12 provided at the tip of the hose connecting cylinder 8 and is in a retaining state in which the step portion between the small diameter part and the large diameter part formed on the inner periphery of the movable connecting cylinder 9 abuts the protrusion 16. And the front end surface of the hose connection cylinder 8 are the same surface.

  In this state, if the connection fitting 11a provided at the end of the large-diameter fire hose 10a faces the tip of the movable connection tube 9, and this connection fitting 11a is externally screwed onto the male screw 13 of the movable connection tube 9, As shown in FIG. 2 (b), the large-diameter fire hose 10a can be connected to the tip of the hose connection tube 8. By opening the valve mechanism with the handle 3, water discharge from the large-diameter fire hose 10a is possible. become.

  Further, when the connection fitting 11a is screwed into the male screw 13, the packing 18a incorporated in the connection fitting 11a is pressed against the distal end surfaces of the movable connection tube 9 and the hose connection tube 8 to prevent leakage of water from the connection portion. It will be.

(A) is a front view showing a state before connecting a small-diameter fire hose of a fire hydrant valve according to the present invention, (b) is a front view showing a state before connecting a large-diameter fire hose of a fire hydrant valve according to the present invention. (A) An enlarged longitudinal front view of the main part showing a state where a small-diameter fire hose is connected to a fire hydrant valve according to the present invention, and (b) a main part showing a state where a large-diameter fire hose is connected to the fire hydrant valve according to the present invention. Enlarged vertical section front view

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fire hydrant valve 2 Valve body 3 Upper handle 4 Fire extinguishing liquid inlet 5 Water supply pipe 6 Fire extinguishing liquid outlet 7 Connection mechanism 8 Hose connection cylinder 9 Movable connection cylinder 10 Small diameter fire hose 10a Large diameter fire hose 11 Connection metal 11a Connection metal 12 Male Screw 13 Male screw 14 Stopper step 15 Projection 16 Projection 17 Water stop seal 18 Packing 18a Packing

Claims (3)

  A hose connection tube is provided at the fire-extinguishing liquid outlet of the valve body, and a male screw is formed on the outer periphery of the tip of the hose connection tube. A movable connecting tube that can be externally fitted to cover the outside of the male screw in a state of being positioned on the distal end side of the hose connecting tube is attached, and a large diameter is provided on the outer peripheral distal end side of the movable connecting tube. A fire hydrant valve with a male thread for threaded connection of a fire hose connector.   The movable connecting cylinder covers the male screw of the hose connecting cylinder in a state where the moving range in the axial direction is located on the distal end side of the hose connecting cylinder, and the hose connecting cylinder is positioned on the root side of the hose connecting cylinder. It is set so that the male screw of the connecting tube is exposed, and the movable connecting tube and the hose connecting tube are arranged so that the distal end surfaces of the movable connecting tube and the hose connecting tube are flush with the movable connecting tube positioned on the distal end side of the hose connecting tube. The fire hydrant valve according to claim 1 formed.   The fire hydrant valve according to claim 1 or 2, wherein a water seal is provided between the fitting surfaces of the hose connection cylinder and the movable connection cylinder.

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