JP2002272868A - Pressure accumulation type fire extinguisher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure accumulation type fire extinguisher to which an indication pressure gauge is normally attached in a normal posture only by screwing and fitting it once so as to enhance assembling work efficiency and also where the usage of only one kind of inner pressure sealing packing with a prescribed thickness is required. SOLUTION: Screwing start end positions 25a and 30a are respectively regulated in the female screw 25 of a valve 4 in a fire extinguisher main body 1 and the male screw 30 of the indication pressure gauge 6. Thus a proper display area part 26 is normally fixed in the normal posture and positioned at a prescribed angle concerning the indication pressure gauge 6 when the male screw 30 of the gauge 6 is screwed onto the female screw 25 of the valve 4 to a final fastening position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a pressure accumulating type fire extinguisher equipped with an indicating pressure gauge for displaying an internal pressure of a fire extinguisher main body.

[0002]

2. Description of the Related Art In a conventional pressure-accumulating fire extinguisher, an indicating pressure gauge is fixed by screwing a male thread of a pressure gauge into a female thread of a valve of a fire extinguisher body. The starting position of the threading end of each of the male thread portions was not determined. For this reason, at the time of assembling this accumulator type fire extinguisher, the indicator in the valve of the fire extinguisher body is placed in the normal position, which is usually the center position directly above, at a predetermined angle position where the appropriate display area portion thereof is not mistaken. In order to accurately mount the packing, several kinds of packings for internal pressure sealing having different thicknesses are prepared, and a packing having a desired thickness is selected and used. In other words, when assembling the accumulator type fire extinguisher, once screw the male thread of the indicating pressure gauge into the female thread of the valve until the final tightening position, and at this time the position of the appropriate display area of the indicating pressure gauge and the proper appropriate indication After checking the degree of deviation from the position of the region, a packing having a thickness capable of correcting the positional deviation is selected from several types of internal pressure sealing packing having different thicknesses. Then, after the indicator pressure gauge is once removed from the valve, the selected packing is interposed between the male thread portion of the indicator pressure gauge and the female thread portion of the valve, and the indicator gauge is screwed into the valve again to be mounted in the normal posture. Was fixed to.

[0003]

However, in the above-mentioned pressure accumulating type fire extinguisher in which the threading start end positions of the female screw portion of the valve and the male screw portion of the indicating pressure gauge are undefined, the proper indication of the indicating pressure gauge as described above. In order to properly position the area, once screw the indicating pressure gauge into the valve of the fire extinguisher body, check the position of the appropriate display area at this time, and then select the packing thickness according to the position. The time-consuming work of screwing and mounting the indicator pressure gauge again (twice screwing and removing the indicator pressure gauge once) is necessary, and it takes a very long time to mount the indicator pressure gauge on one fire extinguisher in the correct posture. And assembling work efficiency was poor. Further, it was necessary to prepare several kinds of internal pressure sealing packings having different thicknesses.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and it is possible to improve the assembling work efficiency by always mounting the indicating pressure gauge once in a normal posture by screwing and mounting it. An object of the present invention is to provide a pressure-accumulation type fire extinguisher that requires only one kind of internal pressure sealing packing of a predetermined thickness.

[0005]

According to the present invention, there is provided a fire extinguisher in which a valve is mounted on an upper part of a fire extinguisher body filled with a fire extinguishing agent and a pressurizing gas for jetting the fire extinguishing agent. An indicating pressure gauge for displaying the filling pressure of the pressurizing gas in the valve is fixed by screwing the male and female screw portions provided on each of the valve and the indicating pressure gauge through an internal pressure sealing packing having a predetermined thickness. In the pressure accumulating type fire extinguisher, the threading start end position of each of the threaded portion of the valve and the threaded portion of the indicator manometer is adjusted when the threaded portion of the indicator pressure gauge is screwed into the threaded portion of the valve to the final tightening position. It is characterized in that the indicating pressure gauge is defined so as to be fixed in a normal posture in which an appropriate display area portion thereof is set at a predetermined angular position.

[0006] According to the pressure accumulating fire extinguisher of the above-mentioned structure, in which the threading start end positions of the screw portion of the valve and the screw portion of the indicating pressure gauge are defined, the screw portion of the valve is indicated when the pressure accumulating fire extinguisher is assembled. By simply screwing the pressure gauge once, the pressure gauge can be mounted in a normal posture so that the appropriate display area portion is always at a predetermined angular position.

[0007]

Embodiments of the present invention will be described with reference to the drawings. 1 is a plan view of an accumulator type fire extinguisher, FIG. 2 is a sectional view taken along line AA in FIG. 1, FIG. 3 is a sectional view taken along line BB in FIG. 1, and FIG. FIG. 5 is a front view of the indicating pressure gauge shown in FIG. 3 before mounting.

In FIGS. 1 and 2, reference numeral 1 denotes a fire extinguisher body filled with a fire extinguishing agent and a pressurizing gas for ejecting the fire extinguishing agent, and 2 denotes a base fixed to the upper end of the fire extinguisher body 1 by welding. A female screw 3 is provided on the inner periphery of the base 2. Reference numeral 4 denotes a valve screwed and fixed to the base 2, and a male screw 4a provided on the outer periphery of the lower end of the valve 4
To the female screw 3. The gasket 5 is hermetically sealed with a packing 5 interposed between the valve 4 and the base 2. Reference numeral 6 denotes an indicating pressure gauge which is screwed and mounted on the front side of the valve 4 and indicates the filling pressure of the pressurizing gas in the fire extinguisher main body 1.

As shown in FIG. 2, a discharge port 7 is opened at one side of the valve 4, and a rear end of a hose 9 having a nozzle (not shown) at the front end of the discharge port 7 connects a joint 8. Are connected via A valve stem 10 is vertically movably inserted into a vertical through hole 11 at the center of the valve 4, and a lower end opening 11 having a large diameter of the vertical through hole 11 is formed at the lower end of the valve stem 10 in accordance with the vertical movement thereof.
a for opening and closing a communication state between a and the discharge port 7
2 are provided. The valve stem 12 is formed by a coil spring 13 mounted between the upper end of the valve stem 10 projecting upward from the valve 4 and the upper end of the valve 4 so that the valve body 12 is positioned in the lower end opening 11 a of the valve 4. It is constantly pulled upward so as to be in close contact with the seat 14.

As shown in FIG. 2, a fixed lever 15 is attached to the upper end of the valve 4 with a screw 16.
A movable lever 17 is pivotally mounted on the fixed lever 15 so as to be openable and closable about an axis 18. When the movable lever 17 is closed, the valve rod 10 is pushed down against the coil spring 13 to separate the valve body 12 from the valve seat 14, so that the lower end opening 11a of the valve 4 and the discharge port 7 are in communication. Become. A movable lever 17 is provided between the fixed lever 15 and the movable lever 17.
A lock member 19 that enables the lock to be unlocked and unlocked in an open state is rotatably mounted around a pivot 20, and a safety plug 21 for preventing the normally movable lever 17 from being inadvertently closed. It is attached to the lock member 19 so that it can be inserted and removed. The upper end of the siphon tube 22 is screwed and connected to the lower end opening 11a of the valve 4.

As shown in FIGS. 3 and 4, a hole 23 into which the indicating pressure gauge 6 is screwed and mounted is provided on the front side of the valve 4 so as to communicate with the inside of the lower end opening 11a through the small hole 24. A female screw 25 is formed on the inner periphery of the hole 23. The structure of the indicating pressure gauge 6 itself is a well-known elastic pressure gauge, and an appropriate display area portion (hatched portion in the figure) 26 is green on the scale plate inside thereof as shown in FIG. And the like, and a pointer 27 for instructing rotation of the appropriate display area 26 is provided at the free end of the sprung 28. In the center of the rear end face of the indicating pressure gauge 6, a screw boss 29 having a fine hole 29a for introducing the internal pressure of the fire extinguisher main body 1 is projected rearward as shown in FIG. The external thread 30 to be screwed into 25 is cut.

An internal pressure of the fire extinguisher main body 1 is provided between the male and female screws 25 and 30 by interposing an internal pressure sealing packing 31 having a predetermined thickness inserted between the valve 4 and the indicating pressure gauge 6 through a screw boss 29. Prevent leakage.

In the pressure accumulating fire extinguisher having the above structure, the present invention provides a threading start end position 25a of the internal thread 25 of the valve 4.
In addition, the present invention is characterized in that the thread cutting start end position 30a of the male screw 30 of the indicating pressure gauge 6 is defined. In this way, the reference pressure gauge is set so that the threading start end positions 25a and 30a of the internal thread 25 of the valve 4 and the external thread 30 of the indicator pressure gauge 6 are the same in all the pressure-accumulating fire extinguishers. When the male screw 30 of the valve 6 is screwed into the female screw 25 of the valve 4 to the final tightening position, the indicating pressure gauge 6 always moves the appropriate display area portion 26 to a predetermined angular position.
For example, the valve 4 is set so as to be in a normal posture located in the center directly above.
Fixed to

Therefore, when assembling the pressure accumulating type fire extinguisher, the indicating pressure gauge 6 can always be fixed in the normal position by screwing it once into the valve 4, so that the threading start end positions of the female screw portion of the valve and the male screw portion of the indicating pressure gauge can be set. It has been possible to eliminate the troublesome work of screwing and once removing the indicating pressure gauge such as the conventional pressure accumulating type fire extinguisher which makes the temperature uncertain. Further, as the internal pressure sealing packing 31 interposed between the female screw 25 of the valve 4 and the male screw 30 of the indicating pressure gauge 6, it is sufficient to use only one kind of predetermined thickness.

In the above embodiment, the screw portion of the valve 4 is a female screw 25 and the screw portion of the indicating pressure gauge 6 is a male screw 30. On the contrary, the screw portion of the valve 4 is a male screw 30 and The screw portion may be a female screw 25.

[0016]

According to the present invention, it is possible to always fix the indicating pressure gauge to the normal position by screwing the indicating pressure gauge once into the valve of the accumulator type fire extinguisher. Assembling work efficiency can be remarkably improved compared to the work that must be removed once.
In addition, it is sufficient to use one kind of internal pressure sealing packing having a predetermined thickness, and there is no need to manufacture an internal pressure sealing packing having a different thickness. This is also advantageous in manufacturing.

[Brief description of the drawings]

FIG. 1 is a plan view of a pressure accumulating fire extinguisher.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a sectional view taken along line BB in FIG. 1;

FIG. 4 is a state diagram before the indicating pressure gauge shown in FIG. 3 is attached to a valve.

FIG. 5 is a front view of the indicating pressure gauge shown in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fire extinguisher main body 4 Valve 6 Indicating pressure gauge 25 Female screw (Valve screw part) 26 Proper display area 30 Male screw (Indicating pressure gauge screw part) 31 Seal for internal pressure sealing

Claims (1)

[Claims] 1. A valve is mounted on an upper part of a fire extinguisher body filled with a pressurizing gas for ejecting the fire extinguishing agent together with the fire extinguishing agent, and the valve is provided with an indicating pressure gauge for indicating a filling pressure of the pressurizing gas. A pressure-accumulating fire extinguisher fixed by screwing male and female threads provided on each of a valve and an indicator pressure gauge through internal pressure sealing gaskets having a predetermined thickness. When the thread of the indicator pressure gauge is screwed into the threaded part of the valve to the final tightening position, the indicator pressure gauge sets the appropriate display area of the threaded portion of the gauge to the predetermined angular position. An accumulator type fire extinguisher characterized by being defined so as to be fixed in a normal posture.