JP2002210033A - Fire extinguisher, and valve cap fixing method for fire extinguisher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fire extinguisher wherein an adhesive can be thoroughly applied extending to the whole of a gap between a male screw 3 on the outer periphery of a mouthpiece section 2 of the fire extinguisher main body 1 and a female screw 22 of a cap nut 20 to bond them, and also, the correction and adjustment for the leakage of an internal pressure after closing the mouthpiece section 2 of the fire extinguisher main body with the valve cap 4 are made possible. SOLUTION: The mouthpiece section 2 of the fire extinguisher main body 1 is closed with the valve cap 4. Then, an adhesive-forcing in hole 23 is provided on the cap nut 20 which clamps and fixes the valve cap 4. The screwing sections of the female thread 22 on the inner periphery of the cap nut 20 and the male thread 3 on the outer periphery of the mouthpiece section 2 are coated and bonded with an adhesive which is quantitatively forced in from the adhesive- forcing in hole 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a maintenance-free accumulator or pressurized fire extinguisher in which a fire extinguisher cannot be refilled in order to prevent unauthorized reuse of a fire extinguisher, and a valve cap of the fire extinguisher. It relates to a fixing method.

[0002]

2. Description of the Related Art A maintenance-free accumulator or pressurized fire extinguisher in which a fire extinguishing agent cannot be refilled is provided with a base of a fire extinguisher body filled with a fire extinguishing agent provided with a valve, a lever, a hose, a safety plug and the like. The valve cap is closed by a valve cap, and the valve cap is fastened by a cap nut screwed into a male screw on the outer periphery of the base. The cap nut and the valve cap are fixed to the fire extinguisher body so that they cannot be refilled with the fire extinguishing agent. As means for making the cap nut unremovable from the fire extinguisher main body, an adhesive is applied to a threaded portion between the external thread on the base of the fire extinguisher main body and the internal peripheral female screw of the cap nut. According to the application method, an adhesive is applied to the surface of the external thread portion on the outer periphery of the base before screwing the cap nut to the external thread on the outer periphery of the base, and after the application, the cap nut is tightened to the external thread on the outer periphery of the base.

[0003]

However, in the above fixing method in which the adhesive is applied to the surface of the external thread portion on the outer periphery of the base of the fire extinguisher body and the cap nut is tightened, the adhesive drops downward with the tightening of the cap nut. Since it flows down to the bottom of the cap nut, it takes time to wipe off the dripping adhesive after the cap nut is screwed. In addition, anaerobic adhesive is often used as the adhesive, but this anaerobic adhesive does not drip, but protrudes from the cap nut, and the protruding adhesive does not harden forever and has viscosity. There was a problem in appearance that it was left standing. These problems are common to both fire extinguishers and accumulators.

In an accumulator type fire extinguisher, after a cap nut is tightened, gas is sealed in the fire extinguisher main body, and after the inside of the fire extinguisher main body is pressurized and accumulated, a leak test of the internal pressure is performed. Even if a leak is found, the cap nut and the valve cap cannot be removed because the adhesive has already been applied, and it has been difficult to retighten the cap nut.

An object of the present invention is to provide an accumulator or pressurized fire extinguisher capable of solving the above-mentioned problems and a method for fixing a valve cap of the fire extinguisher.

[0006]

According to the present invention, a base portion of a fire extinguisher body filled with a fire extinguishing agent is closed with a valve cap having an outward flange having a diameter larger than the inner diameter of the base portion. A cap nut having an inward flange smaller in diameter than the outward flange is formed on the valve cap so that the inward flange engages with the upper side of the outward flange on the valve cap. In a pressure accumulating type or pressurizing type fire extinguisher, which is screwed to a male screw on an outer periphery of the base portion and tightened so as to draw the valve cap toward the base portion, the cap nut is provided with an adhesive press-fitting hole, The threaded portion of the female screw on the inner periphery of the nut and the male screw on the outer periphery of the mouth portion is applied and bonded with an adhesive fixedly press-fitted from the adhesive press-fitting hole.

According to the fire extinguisher of the above construction, an adhesive press-in hole is provided in the cap nut, and an adhesive which is fixedly press-fitted from the adhesive press-in hole is applied to a threaded portion between the female screw of the cap nut and the male screw of the base. Since the adhesive is adhered, the adhesive does not hang or protrude from the cap nut, and the adhesive can be spread evenly over the entire gap between the internal thread of the cap nut and the external thread of the mouthpiece to apply and adhere evenly. it can.

According to the method for fixing a valve cap of a fire extinguisher of the present invention, a base portion of a fire extinguisher body filled with a fire extinguisher is closed with a valve cap having an outward flange having a diameter larger than the inner diameter of the base portion. A cap nut having an inward flange smaller in diameter than the outward flange formed at the upper end opening is externally fitted to the valve cap such that the inward flange engages above the outward flange, and the inner periphery of the cap nut. When fixing the valve cap of a pressure accumulating or pressurizing type fire extinguisher in which the female screw of the screw is screwed into a male screw on the outer periphery of the base and the valve cap is pulled toward the base, after the cap nut is tightened, A fixed amount of adhesive is press-fitted from an adhesive press-fitting hole provided in the cap nut, and the screw portion of the female screw on the inner periphery of the cap nut and the male screw on the outer periphery of the mouth portion is applied and bonded. Those having features and.

According to this method for fixing the valve cap of a fire extinguisher, the screwed portion between the female screw of the cap nut and the male screw of the base is tightened with an adhesive which is fixedly press-fitted from the adhesive press-in hole of the cap nut after tightening the cap nut. Apply and bond. Therefore, the adhesive can be applied and bonded evenly over the entire gap between the female screw of the cap nut and the male screw of the base without dripping or protruding the adhesive. Also, the application of the adhesive
Once the cap nut is tightened, gas is sealed in the fire extinguisher body, and the internal pressure of the fire extinguisher body can be increased to accumulate the pressure. Can now correct and adjust leaks by opening and closing the cap nut.

[0010]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional front view of a valve cap portion of a fire extinguisher, and FIG. 2 is a front view of a cap nut of FIG.

1 and 2, reference numeral 1 denotes a fire extinguisher main body filled with a fire extinguisher, and 2 denotes a base provided at an upper end of the fire extinguisher main body 1. A male screw 3 is provided on the outer periphery of the base 2. Have been. Reference numeral 4 denotes a valve cap that closes the base 2.
The outer diameter of the lower end 4a of the valve cap 4 is formed smaller than the inner diameter of the base 2, and an outward flange 5 having a diameter larger than the inner diameter of the base 2 is provided on the outer periphery near the lower end of the valve cap 4. Have been.

A nozzle 6 is screwed into one side of the valve cap 4, and a valve rod 7 is inserted through the center of the valve cap 4 so as to be movable up and down. Accordingly, a valve body 9 for opening and closing a communication state between the lower end opening 8 of the valve cap 4 and the nozzle 6 is provided. The valve stem 9 is fixed to the lower end opening 8 of the valve cap 4 by a coil spring 10 mounted between the upper end of the valve stem 7 protruding above the valve cap 4 and the upper end of the valve cap 4. It is constantly urged to pull up so as to be in close contact with the inner valve seat 11.

A fixed lever 12 is attached to the upper end of the valve cap 4 with a screw 13, and a movable lever 14 is pivotally connected to the fixed lever 12 so as to be openable and closable about a shaft 15. When the movable lever 14 is closed,
The valve stem 7 is pushed down against the coil spring 10 and the valve body 9
Is separated from the valve seat 11, so that the lower end opening 8 of the valve cap 4 and the nozzle 6 are in communication with each other. Between the fixed lever 12 and the movable lever 14, a lock member 16 that allows the movable lever 14 to be locked and unlocked in an open state is attached rotatably around a pivot 16 a, and the normally movable lever 14 is not fixed. A safety plug 17 for preventing easy closing operation is attached to the lock member 16 so as to be removable. In addition, the valve cap 4
The upper end of the siphon tube 19 is screwed to the lower end opening 8 of the siphon. The nozzle 6 discharges a fire extinguishing agent from the nozzle 6 without connecting a hose. However, the present invention relates to a fire extinguishing type in which a hose having a nozzle at the tip is connected. Of course, it can be applied to a vessel.

The valve cap 4 has a cap nut 20.
Is fitted outside. An inward flange 21 having a smaller diameter than the outward flange 5 of the valve cap 4 and engaging with the upper side of the outward flange 5 is formed on the inner periphery of the upper end opening of the cap nut 20.
A female screw 22 that is screwed into the male screw 3 on the outer circumference of the base 2 is provided on the inner periphery of the lower end of the cap nut 20, and a small adhesive press-in hole 23 is provided on the peripheral wall of the cap nut 20 so as to penetrate inside and outside. I have.

Using the cap nut 20, the valve cap 4 is fastened and fixed to the base 2 of the fire extinguisher body 1 via a packing 24. At that time, cap nut 20
Is engaged with the outward flange 5 and the cap nut 20 is screwed into the male screw 3 on the outer periphery of the base, and the valve cap 20 is tightened so as to be drawn toward the base 2. By this tightening, the space between the valve cap 20 and the base 2 is hermetically sealed via the packing 24.

After the valve cap 4 is attached by tightening the cap nut 20, gas is sealed into the fire extinguisher main body 1 through the nozzle connection port 18, and the inside of the fire extinguisher main body 1 is pressurized and accumulated to perform an internal pressure leak test. Do. When an internal pressure leak is found from a place such as the packing 24 in the leak test, the leak at the place can be corrected and adjusted by turning the cap nut 20 to open and close.

Finally, an adhesive such as an anaerobic adhesive is applied from the adhesive press-in hole 23 of the cap nut 20 to a predetermined pressure (for example,
By press-fitting a fixed amount at 1 MPa (10 kgf / cm ² ), the female screw 22 of the cap nut 20 and the male screw 3 of
Is applied and adhered. At this time, the adhesive fixedly injected from the adhesive press-in hole 23 does not hang down or protrude below the cap nut 20, so that the adhesive between the female screw 22 of the cap nut 20 and the male screw 3 of the mouthpiece 2 is not formed. The entirety of the gap is spread evenly, and the female and male screws 22 and 3 are uniformly applied and bonded. Further, in the case of an anaerobic adhesive which is an adhesive mainly used in this kind of bonding, the anaerobic adhesive is present between the female and male screws 22 and 3 and hardly comes into contact with the outside air. Can be cured and adhered to.

In such a case, since the cap nut 20 and the valve cap 4 cannot be removed from the base 2 of the fire extinguisher main body 1, the inside of the fire extinguisher main body 1 is illegally opened to replenish or replace the fire extinguishing agent. Can be prevented from being reused. It is needless to say that the present invention is not limited to the pressure accumulating type fire extinguisher in the illustrated example, but can be similarly applied to a pressurized type fire extinguisher.

[0019]

According to the present invention, the adhesive which is fixedly press-fitted from the adhesive press-fitting hole provided in the cap nut is applied uniformly over the entire gap between the female screw of the cap nut and the male screw of the fire extinguisher body. It can prevent the adhesive from dripping or protruding from the cap nut, and can correct and adjust when there is internal pressure leakage after closing the base of the fire extinguisher with the valve cap. It is advantageous.

[Brief description of the drawings]

FIG. 1 is a vertical sectional front view of a valve cap portion of a fire extinguisher.

FIG. 2 is a front view of the cap nut of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fire extinguisher main body 2 Base part 3 Male screw 4 Valve cap 5 Outer flange 20 Cap nut 21 Inward flange 22 Female screw 23 Adhesive press-fitting hole

Claims (2)

[Claims] 1. A base part of a fire extinguisher body filled with a fire extinguishing agent is closed by a valve cap having an outward flange having a diameter larger than the inner diameter of the base part. A cap nut having a small-diameter inward flange is externally fitted to the valve cap so that the inward flange engages the upper side of the outward flange, and a female screw on the inner periphery of the cap nut is an external thread on the outer periphery of the base. In a pressure accumulating type or pressurizing type fire extinguisher, which is screwed to the valve cap to draw it toward the base, an adhesive press-in hole is provided in the cap nut, and a female screw on the inner periphery of the cap nut and a base are provided. A fire extinguisher, wherein a threaded portion of a male screw on an outer periphery of the fire extinguisher is applied and adhered with an adhesive fixedly press-fitted from the adhesive press-fitting hole. 2. A base portion of a fire extinguisher body filled with a fire extinguishing agent is closed by a valve cap having an outward flange having a diameter larger than the inner diameter of the base portion. A cap nut having a small-diameter inward flange is externally fitted to the valve cap so that the inward flange engages the upper side of the outward flange, and a female screw on the inner periphery of the cap nut is an external thread on the outer periphery of the base. When fixing the valve cap of a pressure accumulating or pressurizing type fire extinguisher, which is screwed into the base and tightened so as to draw the valve cap toward the base, after the cap nut is tightened, an adhesive provided on the cap nut is press-fitted. A fixed amount of an adhesive is press-fitted from a hole, and a threaded portion of a female screw on an inner periphery of the cap nut and a male screw on an outer periphery of a base portion is applied and adhered, and a valve cap for a fire extinguisher is provided. Method.