JP2011120620A - Fire extinguisher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive and highly safe fire extinguisher which does not easily cause the explosion or rupture of a cylinder due to rust. <P>SOLUTION: The cylinder 1 has a bottom member 101 and a cylindrical member 102. The bottom member 101 and the cylindrical member 102 are both constituted of a metal material whose main component is iron. The cylindrical shape 102 is in a cylindrical shape in which the bottom part side is removed, the bottom member 101 is fitted to the inside of the bottom part side, and welding WL1 with stainless steel is applied to the outer peripheral part of the fitted part. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a fire extinguisher.

  Fire extinguishers are classified into several categories depending on the fire extinguishing agent used, the radiation method and form of the agent, and the like. For example, as disclosed in Patent Document 1, there are ABC powder fire extinguishers, chemical foam fire extinguishers, carbon dioxide fire extinguishers, halide fire extinguishers and the like as classification by fire extinguishing agents. Among these fire extinguishers, the currently popular fire extinguisher is the ABC powder fire extinguisher. A fire extinguisher extinguishes fire by applying three of the extinguishing principles: cooling, suffocation, and suppression. A is a normal fire, 1 or more in the first fire extinguishing test (large fire extinguisher is 10 or more), B is an oil fire, and the second or third fire extinguishing test is 1 or more (large fire extinguisher is 20 or more) Indicates the unit. C represents an electric fire and there is no numerical value.

  By the way, this kind of fire extinguisher generally has an iron cylinder for enclosing a digestive drug. A fire extinguisher cylinder is required to have pressure resistance and thick, and cannot be manufactured by, for example, drawing. Therefore, normally, an iron bottom member is fitted on the bottom side of an iron cylinder member which is a main part of the cylinder, and the outer peripheral portion of the fitting portion is welded. Since the cylindrical member and the bottom member are made of iron, the cylindrical member and the bottom member are joined by iron welding as general technical common knowledge of welding.

  The reason why the cylinder is made of iron is to reduce the cost of the fire extinguisher as a whole. However, recently, there have been a number of cases in which the above-described steel cylinders burst and caused personal injury. It has been ascertained that the rupture of the iron cylinder occurs mainly at the welded portion between the tubular member and the bottom member and is caused by rust at the welded portion. As means for solving the above problem, means such as rust prevention coating is taken, but even if such means are taken, the above-described progress of rust cannot be stopped. Rust is particularly a problem in fire extinguishers installed at food manufacturing sites where large amounts of water are used and at sites where chemicals are handled.

  It is conceivable that the cylinder is made of stainless steel as a means to prevent the rust of the iron cylinder from rusting. However, the stainless steel cylinder causes a significant increase in cost as compared with the case of the iron cylinder, and it is marketable.・ Industrial utility is lost.

  Furthermore, although it is desirable to replace a normal fire extinguisher in 8 years, such a preferred replacement is not always performed. Moreover, depending on the environment in which the fire extinguisher is placed, the cylinder may burst even within 8 years. In addition, fire extinguishers installed in houses are not obliged to check. Against this background, there is no end to the bomb explosion accident. In fact, there have been many painful personal accidents due to explosions in recent years, and prevention of explosions is an urgent issue in fire extinguishers.

JP-A-5-329221

  An object of the present invention is to provide a fire extinguisher that is inexpensive and does not easily cause explosion or rupture of a cylinder due to rust and has high safety.

  In order to solve the above-described problem, the fire extinguisher according to the present invention has a cylinder for storing a fire extinguisher. The cylinder includes a cylindrical member and a bottom member. The cylindrical member and the bottom member are made of a metal material whose main component is iron, the bottom member is fitted on the bottom side of the cylindrical member, and the outer peripheral portion of the fitting portion is welded with stainless steel.

  As described above, in the fire extinguisher according to the present invention, the cylinder member and the bottom member constituting the cylinder are made of a metal material mainly composed of iron, so that the cylinder is inexpensive compared with the case where the cylinder is made of stainless steel. Become.

  In addition, since the bottom member is fitted on the bottom side of the cylindrical member and the outer peripheral portion of the fitting portion is welded with stainless steel, a welding structure in which rust does not easily progress is realized. Therefore, it is possible to obtain a highly safe fire extinguisher that does not easily cause an explosion or explosion of a cylinder.

  As described above, according to the present invention, it is possible to provide a fire extinguisher that is inexpensive and highly resistant to explosion or explosion of a cylinder.

  Other objects, configurations and advantages of the present invention will be described in more detail with reference to the accompanying drawings. The accompanying drawings are merely examples.

It is a front fragmentary sectional view of the fire extinguisher which concerns on one Embodiment of this invention. It is sectional drawing which expands and shows the 1st welding part of the fire extinguisher shown in FIG.

  The present invention can be widely applied to a fire extinguisher having an iron cylinder and having a danger of explosion and explosion of the cylinder. For example, the ABC powder fire extinguisher, the chemical foam fire extinguisher, the carbon dioxide fire extinguisher, the halide fire extinguisher, etc. mentioned above are examples. Here, what was disclosed by patent document 1 is illustrated as an example.

  Referring to FIG. 1, a digestive (liquid) 2 is contained inside the cylinder 1. A holder 3 is fixed to the upper part of the cylinder 1. A sealing plate 5 is fixed and sealed with screws 4 at the bottom of the holder 3. A gas introduction valve device 6 is provided on the sealing plate 5, and a carbon dioxide gas cylinder 7 is provided thereon.

  When not in use, the safety stopper 9 is fixed between the grip 8 and the lever 10 so that the carbon dioxide gas cylinder 7 is not pushed down by the lever 10 inadvertently. When using, the safety pin 11 is pulled upward, the safety stopper 9 is turned around the valve opening / closing rod 13, and is moved between the grip 8 and the lever 10, and the lever 10 and the grip 8 are strengthened together. Hold. Then, the carbon dioxide gas cylinder 7 is pushed down with the lever pin 12 as a fulcrum, breaks through the sealing plate 5 of the carbon dioxide gas cylinder 7, and the carbon dioxide gas in the carbon dioxide gas cylinder 7 passes through the gas introduction valve device 6 to the inside of the cylinder 1. The cylinder 1 is pressurized while being dissolved in the fire extinguisher.

  Further, when the lever 10 is firmly grasped, the valve opening / closing rod 13 pressed downward by the spring 14 is pulled up with the carbon dioxide gas cylinder 7 as a fulcrum, and the seal valve 15 which is a pure water ejection valve device is opened and pressurized. The fire extinguishing agent is radiated from the emission noise 18 through the siphon tube 16 and the hose 17. At this time, when the discharge nozzle 18 is separated from the nozzle fixing portion 19 and directed toward the fire extinguishing target, the fire extinguishing agent containing carbon dioxide gas can be applied to the fire extinguishing target, and the fire can be extinguished.

  In the fire extinguisher according to the present invention, the cylinder 1 includes a bottom member 101, a cylindrical member 102, and an upper member 103. The bottom member 101, the cylindrical member 102, and the upper member 103 are all made of a metal material whose main component is iron. That is, the fire extinguisher according to the present invention uses an iron cylinder.

  The cylinder member 102 constituting the main part of the cylinder has a cylindrical shape with the bottom side removed, the bottom member 101 is fitted inside the bottom side, and the outer peripheral part of the fitted part is welded with stainless steel WL1. As a result, the bottom of the cylindrical member 102 is closed by the bottom member 101. According to common sense of welding technology, welding is usually performed using the same material as the base material. If both the bottom member 101 and the cylindrical member 102 are made of a metal material containing iron as a main component, it is common knowledge to weld using an iron filler rod or the like. The present invention has made a leap from the common technical knowledge of welding, and the place where iron welding should be originally performed is stainless steel welding WL1.

  In the embodiment, the bottom member 101 is a cylindrical body that is open at the lower end side and closed at the upper end side, and has a stepped portion having an upper half portion 111 having a small outer diameter and a lower half portion 112 having a large outer diameter. It has become a shape. The outer peripheral surface of the upper half 111 and the outer peripheral surface of the lower half small diameter 112 are continuous via the inclined surface 113.

  In the bottom member 101, the upper half portion 111 is fitted into the inside through an opening opened on the bottom side of the cylindrical member 102, and the outer peripheral surface thereof is in surface contact with the inner peripheral surface of the cylindrical member 102. On the other hand, the end portion 114 of the cylindrical member 102 hits the inclined surface 113 and is positioned at that position. In the positioned state, a ring-shaped space is generated between the end portion 114 of the cylindrical member 102 and the inclined surface 113. Stainless steel weld WL1 is performed to fill this space. In this case, argon welding using a stainless steel filler rod is suitable. The welded portion WL2 (see FIG. 1) between the tubular member 102 and the upper member 103 is also preferably made of stainless steel.

  As described above, in the fire extinguisher according to the present invention, the cylinder member 102 and the bottom member 101 constituting the cylinder are made of a metal material mainly composed of iron. Therefore, in contrast to the case where the cylinder is made of stainless steel, It will be cheaper.

  Moreover, since the bottom member 101 is fitted on the bottom side of the cylindrical member 102 and the outer peripheral portion of the fitting portion is stainless steel welded WL1, a welded structure in which rust does not easily progress is realized. In the past cases of fire extinguisher rupture / explosion accidents, rust generated at the welded portion of the bottom member 101 and the cylindrical member 102 causes the bottom member 101 to be as if it were a rocket bullet due to the pressure of the extinguishing agent. Teaching that something will pop out. In the present invention, since the welding of the bottom member 101 and the cylindrical member 102, which are likely to cause a fire extinguisher rupture / explosion accident, is made of stainless steel weld WL1, the cylinder in the welded portion between the bottom member 101 and the cylindrical member 102 in question is used. It is possible to obtain a highly safe fire extinguisher that is unlikely to cause explosions or bursts.

  As described above, according to the present invention, the cylinder member 102 and the bottom member 101 constituting the cylinder are made of a metal material containing iron as a main component, and the cost reduction benefits and the explosion and rupture of the cylinder are achieved. A highly safe fire extinguisher that is difficult to occur is obtained. That is, the present invention has the greatest feature in that the cost reduction and the solution to the problem due to rust can be achieved at the same time.

  Although the contents of the present invention have been specifically described above with reference to the preferred embodiments, it is obvious that those skilled in the art can take various modifications based on the basic technical idea and teachings of the present invention. It is. For example, the welded portion of the cylinder 1 may include a portion that extends linearly along the direction of the vertical axis.

1 cylinder
101 Bottom member
102 Tube member
2 Extinguishing media
WL1 Stainless steel welded part

Claims (1)

A fire extinguisher having a cylinder for storing a fire extinguisher,
The cylinder includes a cylindrical member and a bottom member,
The cylindrical member and the bottom member are made of a metal material whose main component is iron, the bottom member is fitted on the bottom side of the cylindrical member, and the outer peripheral portion of the fitting portion is stainless-welded,
Fire extinguisher.

Images