JPH041956Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a pressure gauge protection structure for a fire extinguisher, and more specifically, the present invention relates to a pressure gauge protection structure for a fire extinguisher. Relating to a pressure gauge protection structure for a fire extinguishing agent release valve.

[Prior Art] In a fire extinguisher that contains a built-in pressure gas, a pressure gauge for detecting internal pressure is attached to the extinguishing agent release valve attached to the top of the fire extinguisher body, and a pressure gauge is installed close to this. A protective member is provided to prevent damage to the product.

In this type of extinguishing agent release valve, a valve body that is biased upward by a spring is generally pressed against a valve seat having a downward pressure contact surface, and the valve shaft, which is integrally formed with the valve body, is moved vertically by a lever. By pushing down, the valve element is separated from the valve seat, and the internal pressure gas is released. Therefore, the pressure gauge to detect the internal pressure in the normal state before use must be connected to the fire extinguisher body side below the pressure contact between the valve body and the valve seat, and is usually connected to the fire extinguisher body side below the pressure contact part between the valve body and the valve seat. A communication hole was formed in a horizontal direction in the lower part of the pressure contact part, and a pressure gauge mounting port was formed at the outer end of the communication hole.

In addition, conventional protective members for such pressure gauges are
A board is placed in a curved manner around the pressure gauge, usually around the upper half, and the base of the board is fixedly supported by sandwiching it between the threaded part of the fire extinguishing agent release valve and the fire extinguisher body. , or the base of the board was fixed by screwing it to the fire extinguishing agent release valve.

[Problems to be solved by the invention] However, pressure gauges usually have an upright pressure display surface, and conventional pressure gauges have a relatively large diameter, so this pressure gauge is placed at the bottom of the side. Conventional fire extinguishing agent release valves equipped with this had to be vertically long.

In addition, regarding the above conventional pressure gauge protection member,
It is not easy to install, and it has to be extended from the fixed support part to the area around the pressure gauge, making it an unnecessarily large member, which has the disadvantage of getting in the way when operating the fire extinguisher.

The present invention has been made in order to eliminate the drawbacks of the above-mentioned prior art, and is a pressure gauge for a fire extinguisher that simplifies the structure of a fire extinguishing agent discharge valve equipped with a pressure gauge and its protective member and facilitates its assembly. The purpose is to provide a protective structure for the device.

[Means for Solving the Problems] In order to achieve the above object, the present invention attaches a protective cylinder surrounding the pressure gauge to the pressure gauge installation port of the fire extinguishing agent discharge valve, and also installs a protective cylinder surrounding the pressure gauge installation port near the tip of the pressure gauge installation port. A gas leak inspection window is installed in the protective cylinder.

[Function] In the pressure gauge protection structure according to the present invention having the above configuration, the entire periphery of the pressure gauge except for the front of the pressure display part is protected by a cylindrical protection member located very close to the pressure gauge. Therefore, the pressure gauge is completely protected, and this protective member does not get in the way when handling the fire extinguisher. Further, since the protective cylinder can be fixed to the pressure gauge mounting port by screwing or the like, assembly is extremely easy. Furthermore, the protective cylinder is equipped with a gas leak inspection window, so even if it is necessary to attach a pressure gauge to the pressure gauge after the protective cylinder has been installed to the pressure gauge mounting port due to the structure, the protective cylinder can be installed. Gas leakage tests can be performed using soapy water, etc. while the device remains attached to the installation port.

[Example] Fig. 1 is an exploded perspective view of a fire extinguishing agent release valve showing an example of the pressure gauge protection structure according to the present invention, and Fig. 2 shows the state where the fire extinguishing agent release valve is attached to the fire extinguisher body. FIG.

The extinguishing agent release valve 10 of this embodiment is attached to the top of a fire extinguisher that uses liquefied gas such as liquefied halon gas as an extinguishing agent. and a female threaded part 14 for attaching a fire extinguishing hose (not shown), and safety valves are provided on both sides of the female threaded part 14 to release gas to the outside if the internal pressure rises above a specified level. 16, and a pressure gauge 1 for detecting internal pressure.
8 and its protective cylinder 20 are attached. Moreover, a handle 21 for carrying the fire extinguisher and a lever 22 for injecting the fire extinguisher are attached to the top of the fire extinguishing agent release valve 10.

As shown in FIG. 2, the extinguishing agent release valve 10 has a valve shaft 24 that moves up and down at the center, and the lower part of the valve body 26 of the valve shaft 24 has an enlarged diameter and is supported by a coil spring 28 installed inside the valve. Under normal conditions, the valve body 26 is pressed against the valve seat 30 and is in a closed state. The valve body 26 is opened by pushing down the lever 22 on the top of the valve shaft 24, and the extinguishing agent is discharged into the space 31 and into the fire extinguishing hose via the male threaded portion 14.

The protective cylinder body 20 has a shape in which a small-diameter mounting part 32 and a large-diameter protective cylinder part 34 are connected by an end part 36, and a portion of the protective cylinder part 34 near the end part 36 has a large number of holes around the entire circumference. A gas leak inspection window 38 is provided. Before installing the pressure gauge 18 into the pressure gauge mounting port 40, the protective cylinder 20 has a mounting portion 32 that engages a female threaded portion formed on the inside with a male threaded portion formed on the outer periphery of the pressure gauge mounting port 40. Pressure gauge installation port 4
Attach to the end of 0.

The pressure gauge 18 is very small (for example, about 23 mm in outer diameter), and the outer periphery of the almost cylindrical housing 42 that houses the pressure sensing part is chamfered so that it can be tightened with an appropriate tool, and the pressure is displayed on the front. 44, and has a male threaded part 46 on the opposite side, and has a communication hole in the center of the male threaded part 46 that communicates with the pressure detection part in the housing 42 and opens at the tip of the male threaded part 46. There is. This pressure gauge 18 is inserted into the protective cylinder 20 using a suitable tool, and the gasket 5
The female threaded portion 48 of the pressure gauge mounting port 40 with the
is screwed onto.

The female threaded portion 48 of the pressure gauge attachment port 40 communicates with a communication hole 52 that extends vertically within the fire extinguisher release valve 10 and communicates with the interior of the fire extinguisher body 60.

In the fire extinguisher having the above configuration, a gas leak test is performed after assembly and filling of the extinguishing agent. This inspection is usually performed visually using soapy water or the like, and the pressure gauge mounting portion is inspected for leaks, particularly at the boundary between the pressure gauge mounting port 40 and the pressure gauge 18.
In this embodiment, the protective cylinder 20 includes the pressure gauge 1
In order to protect it near the pressure gauge 18 and to facilitate assembly, a cylinder slightly larger than the outside diameter of the pressure gauge 18 is rotated and attached to the pressure gauge mounting port 40. Since it is necessary to engage the mounting portion 32, which has a smaller diameter than the pressure gauge mounting port 40, with the pressure gauge mounting port 40, it must necessarily be mounted to the pressure gauge mounting port 40 before the pressure gauge 18. The above gas leak inspection needs to be performed after the pressure gauge 18 is attached to the pressure gauge mounting port 40, but since the gas leak inspection window 38 is provided in the protective cylinder 20 of this embodiment, the protective cylinder Gas leakage inspection can be performed with 20 attached.

In this embodiment, the gas leak inspection window 38 is provided at the cylindrical portion 34 of the protective cylinder, but it may be provided at the end 36 of the protective cylinder.

[Effect of idea]

As explained above, the pressure gauge protection structure according to the present invention includes attaching a protective cylinder surrounding the pressure gauge to the pressure gauge installation port of a fire extinguisher discharge valve, and attaching a protective cylinder to the protective cylinder near the tip of the pressure gauge installation opening. Since a gas leak inspection window is provided, the structure around the pressure gauge and its protective members can be simplified, and the overall shape of the fire extinguishing agent release valve can be made smaller without interfering with gas leak inspection after assembly and gas filling. This has the effect of making assembly possible and extremely easy to assemble.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a fire extinguishing agent release valve showing one embodiment of the pressure gauge protection structure according to the present invention, and FIG. 2 is a longitudinal sectional view showing the state in which the release valve is attached to a fire extinguisher main body. 10...Extinguishing agent release valve, 18...Pressure gauge, 20
...Protective cylinder, 38...Gas leak inspection window, 40...
...Pressure gauge installation port.

Claims (1)

[Scope of utility model registration request] A pressure gauge protection structure for a fire extinguishing agent release valve equipped with a pressure gauge that detects the internal pressure of a fire extinguisher body, wherein a protective cylinder surrounding the pressure gauge is attached to the pressure gauge installation port of the fire extinguisher release valve, and the pressure gauge is A pressure gauge protection structure for a fire extinguisher, characterized by a gas leak inspection window provided in the protective cylinder near the tip of the gauge mounting port.