JPS5828070A - Emergency gas shut down apparatus - Google Patents

Abstract

PURPOSE:To permit an intercepting valve to be operated certainly in emergency by means of a simple means in which the locking piece of the locking mechanism which retains the valve piece of the intercepting valve is released and urged by means of the electrical signal from outside, thus closing the valve by means of a magnetic force. CONSTITUTION:When a detector detects an earthquake and the instruction signal for informing the emergency state is sent as an electric current for a short time to the electromagnet 22 of a locking mechanism 20 through a conductor 27, and attraction piece 25 is attracted by the excitation of the coil of the electromagnet 22, and the top edge of a locking piece 24 lowers against the pulling force of a spring 25 which acts to the rear edge of the locking piece 24, and the engagement between the locking clutch 24' and a locking head 18 is intercepted. Therefore, a valve-operating valve 17 is attracted to the fixed magnetic piece 15 side in a moment by the attractive action in the magnetic field of the magnetic piece 15 fixed on a frame body 11, and a valve piece 16 is brought into contact with a valve seat 13 in a moment, and the valve is closed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a valve that is installed in a fuel supply pipe to a gas combustion appliance and can reliably shut off the fuel gas by a simple means in an emergency.

With the recent evolution of technology, city gas and propane gas are commonly used as fuel, and of course pipes are installed to supply them.
Even in ordinary households, it is distributed to various combustion appliances and used, and the fuel gas used has a higher calorie than previous fuel gas, so if an abnormal situation occurs due to an earthquake, etc. , it is necessary to automatically extinguish the combustion part to prevent the occurrence of a fire. Therefore, in recent years, emergency gas shutoff devices have been developed in the event of an earthquake or the like in the middle of piping to equipment that uses gas fuel, and various studies have been conducted on disaster prevention measures, and the techniques thereof have been disclosed. However, since it is a preventive measure, it is activated in case of emergency.
Moreover, in order to obtain something that can definitely achieve the purpose, the overall structure not only becomes complicated and expensive, but also
Even when used for general household use, there are many problems in handling.

Furthermore, even in these emergency gas shut-off devices that have entered the practical stage, installation of the mechanism for quick-acting operation is restricted to areas such as off-shore areas, and therefore handling is often difficult due to earthworks, and inspection of the operating function of the equipment may be difficult. There are many obstacles to generalization, such as the difficulty of easily confirming this.

In view of this situation, the present invention aims to eliminate structural complexity and provide an inexpensive product that is extremely simple in structure, operates reliably, is practical, and can be widely used for general household use.

That is, the present invention is a gas cutoff device that is installed in a pipe for a carbon-hydrogen fuel gas and is activated by a command signal from an appropriate location inside or outside in an emergency, which has a closed structure and connects the top of the gas inlet pipe and the outlet pipe. It has a casing with a body that makes it possible to open the market.
A valve which is housed in a cough casing and is removably connected to the gas outlet and is operated to close the valve by magnetic force; a shutoff valve unit having a locking mechanism that pulls the valve element away from the valve seat and locks the valve element; The locking mechanism, which engages and locks in the normal state at t5, is electrically connected to the external command signal transmitter through an airtight tile from inside the casing, and the locking lever is activated from the command signals -1'j, K. It is constructed so that the valve can be closed by actuation.

II lower invention'! The various embodiments will be described in detail with reference to the drawings as follows.

The casing H shown in FIGS. 1 to 3 is a specific example of the present invention, in which the casing H has a box shape with an open upper part, and one end is oin' + the center in the direction of the operator's hand. A gas inlet pipe (2) and a gas outlet pipe (3) are protruding from each other, respectively, and the cover plate (5) is attached to the open part of the -E section via a gasket (4) with screws (6). Stop and close the crocodile. In addition, the gas outlet pipe (3) is attached to the integrally provided mounting 7 flange (3') of the casing II). (
4) It is fixed airtight through. and the gas inlet pipe (
2) and the gas outlet pipe (3) both have outer peripheries formed to ensure that a rubber hose (not shown) can be fitted thereinto.

The shutoff valve unit (101) accommodated and fixed in the casing (1) has an external dimension that fits inside the casing (f++) as shown in FIG. The frame body (11) K is bent in a U-shape +r+1 when viewed from the side, and a short connecting pipe (1) is fixed integrally at the center of the bent upright surface (+i5), and this connecting pipe (1
A valve seat (131) is provided on the inner end of the frame (II) of 21, and a slow-drying sticky substance such as silicone grease or gas is provided on the inner periphery of the outer protrusion of the limb tube (+2). An adhesive sealant (14) that facilitates fitting and connection, such as a sealant for piping, etc., is applied to an appropriate thickness, and the frame body (1
1) A fixed magnet piece f15) which becomes a permanent magnet with a valve stem insertion support hole 04 drilled in the center at the inner position, and the center of the support hole ++A of The valve rod θ^ is inserted and supported in the support hole 04 of the fixed magnet piece (15j), and the valve element H provided at its tip is attached to the valve seat. (Arranged so as to face 11, a locking head end is formed at the rear end of this valve stem Q west, and a permanent magnet is placed at a position slightly closer to the locking head H in the middle part of the valve stem 16. The valve operating piece 07) formed in the above is fixed with adhesive, and an electromagnetically actuated locking mechanism is fixed on the upper surface end of the lower plate (+71) of the frame (ll). As shown in Figure 4, the locking mechanism (a) consists of a micro electromagnet □□□ mounted on a board, and a claw piece whose main body is pivoted at the upper end of an upright column (2) adjacent to it. In order to lift the end locking port of the claw piece upward,
It consists of a tension spring connecting the rear end of the claw and the rear end of the claw, and on the lower surface of the tip of the claw, there is a suction piece made of magnetic material that is operated by attraction by the excitation of the electromagnet (b). ) is attached to the electromagnet □□□ (with a bow lead wire η) and is connected to a command signal transmitter (not shown) outside the casing (1). (2) The locking claw d is lifted by the force, and the locking claw d engages with the locking head flange green 04 at the rear end of the valve stem θ4 as shown in the figure, and the valve head 0 is pressed against the valve seat. (Constructed so that it is held in the rearmost state with respect to !→. In this state, the valve operating piece 0η fixed to the valve stem 04 and the fixed magnet piece 05) are located within a magnetic field that attracts each other. The suction force is applied to the locking mechanism by the engagement between the locking port of the locking mechanism and the valve stem, which separates and holds the valve stem. θ, S, and valve H are made of non-magnetic material, such as stainless steel.

In this manner, the quick-actuating valve unit l-flψ has adhesive (ITI) applied liberally to the lower surface of the lower plate (17) of its frame (11), and the connecting pipe (1) is attached as shown in FIG. The base end pipe (f) of the odor gas outlet pipe (3) is fitted onto the base end pipe (f), and the adhesive sealant (1→) is used to tightly connect each other, and the frame lower plate (1τ)
It is fixed to the inner bottom surface of the casing ill by the accompanying coupling agent θ, and the casing (1) is closed and sealed with the lid body (5) to be assembled integrally. , 1il127 is inserted into the casing (1) with a small hole drilled in advance and then exited from the casing (1). This small hole portion is hermetically sealed with an adhesive, a sealant, or the like.

The device of the present invention ['1 constructed as above] is designed so that after one use, the gas hose is filled with C gas near the main valve at the gas piping supply to the gas appliance.
, and one end of the hose to the gas appliance is connected to the gas outlet pipe (3), and the lead wire shift 1 is connected to a device (not shown) that detects and sends an emergency message. ,
It is preferable to arrange the casing (1) so that it is in a water droplet state.

To explain the operating state, for example, if an earthquake is detected by a detector and a command signal to notify an emergency situation is sent as a current to the electromagnet (22) of the locking mechanism (A) for a short time, the electromagnet (22) ) is attracted by the attraction piece (B), and the tip of the claw piece (2) descends against the force of the pull spring 211 acting on the rear end, and engages the L locking claw &A!++9 Since the coupling with the valve operating valve (1η is the frame 111) is momentarily attracted to the fixed magnet piece (15) by the attraction action within the magnetic field with the fixed magnet piece (+5), Benko (1 phrase is Benza (1 phrase)
The valve closes when it comes into contact with ■. At this time, the valve shown in Figure 5; Since it is designed to create a gap t of M,
Due to the attractive action of both magnetic materials, a strong suppressing contact force is exerted on the valve seat (13) via the valve stem R14, and the valve closing function can be made more effective. Therefore, for example, if it is connected to a gas leak alarm or an earthquake motion detector, it will be possible to prevent disasters caused by gas leaks, not only when gas is used in general gardens, but also when it is not in use. This can prevent this from happening.If you apply a viscous substance such as silicone grease to the surface of the valve, it will be possible to prevent it from happening from the outside after the valve has closed. Even if it is subjected to vibration, the airtight effect will not be broken, and the shut-off state can be maintained safely.

To restore the shutoff valve device to the state it was in after returning to normal and make it ready for supply, remove the hose on the gas outlet side and insert a suitable straight rod into the casing (1) from the opening side of the gas outlet pipe (3). Push the valve head (11%) back against the attraction force by the magnetic force to engage the valve head (11%). The claw piece (24) swings on the pivot part and the locking pawl and the locking type (1 barrel When the edge is engaged, the 1/% valve H is returned to its original state, and by connecting the hose to the gas outlet pipe (3) again, it is possible to return to the gas supply state.

Furthermore, in the device of the present invention, it is possible to check whether the shutoff valve unit l-+101, which is the main part, performs the valve closing operation by itself using an electrical command signal from the outside, so this can be checked immediately before assembly. After testing the main parts, it can be housed and fixed in a casing and supplied, making the work easier during production and producing a reliable product.
The simplification of the structure not only improved the effectiveness of the function but also reduced the product cost, making it easier to operate more reliably and to become popular as an inexpensive household gas safety device.

In accordance with the spirit of the present invention, the present invention is not limited to the above embodiments, and the gas outlet pipe is integrated with the casing.
2) In addition to the spherical shape of the valve, the shape of the valve should be conical, spherical, or other shapes; and 1) the valve should have a locking mechanism that can be activated by an air signal to lock and reset the valve. You can arbitrarily change the things you do, etc. Also, depending on the features of this device, it is possible to use a lamp from the outside to indicate whether the device is open or closed, and to provide a means such as an alarm bell to indicate the shut-off state.

[Brief explanation of the drawing]

Figure 1 shows an example of an embodiment of the gas shielding 1tFi device according to the present invention.
FIG.
Figure (C1: A sectional view showing the valve closed state. (1)...Casing, (2)...Gas inlet pipe, (
3)...Gas outlet pipe, (f)...Proximal end pipe, (6)...
...Lid, fllll...Shutoff valve unit, pi)
...Frame body, (1..Connection pipe, (11..Valve seat,
θXun...Sealing agent, Or8...Fixed magnet valve, (14
...Support hole, (1→...valve element, (!4...valve stem,
o'i... Valve operation piece, Haru... Section 1E head, 0zu...
Adhesive, C1... IF mechanism, (a)... Electromagnet,
Snout)...Claw piece, Nene...Latching claw, (To)...Tension spring. (11)

Claims (1)

[Scope of Claims] A gas cutoff device installed in a hydrocarbon fuel gas piping and activated by a command signal from an appropriate location inside or outside in an emergency, the lid having a gas inlet pipe and an outlet pipe and capable of being opened and closed. a casing with a solid body, and a valve seat at the inner end of a pipe part accommodated in the casing which is removably fitable and airtightly connected to the gas outlet pipe, A locking mechanism that pulls and holds the valves away from the valve seat;
and a shutoff valve unit consisting of a frame that holds and fixes these in the casing, and a lock that engages the rear end of a valve stem with a valve element attached to the tip of the shutoff valve and holds it in a normal state. An emergency gas cutoff device in which the locking claw of the mechanism is released by an external electric signal and the valve is closed by magnetic force.