JPH0247823Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Application Field>> This invention relates to a shutoff valve with a built-in shutoff valve, in which a gas shutoff function is integrated into the shutoff valve.

<<Prior Art>> A gas cutoff valve shuts off gas by driving a solenoid in response to an alarm output from a detector such as a gas leak alarm, and various structures are known.

《Problem that the invention aims to solve》 However, in general, the cutoff valve is installed in the piping afterwards, and when adding a detector, etc., the gas cutoff valve is connected in the middle of the existing piping. However, the piping connection work was troublesome, the number of connections increased, the reliability and strength of the piping in these parts decreased, and extra costs such as construction costs were incurred.

In addition, conventionally, gas cutoff valves are installed outdoors, so if you want to link them to an indoor alarm, you have to run the wiring outside.
Wiring routing and appearance treatment were also troublesome.

This idea solves the above problems,
By assembling the gas cutoff valve function into the shutoff valve,
The purpose is to share parts in both mechanisms, thereby simplifying the mechanism, simplifying the piping connection work, and preventing a decrease in reliability and strength due to an increase in the number of connections.

<Means for Solving the Problems> In order to achieve the above object, this invention includes a valve seat provided in the gas passage of the valve housing, one or more sockets provided downstream of the valve seat, and a valve seat provided in the gas passage of the valve housing. A solenoid fixed to the valve housing, a plunger located at the center of the solenoid and protruding into the valve housing, and a valve body provided at the tip of the plunger are provided on the opposite side of the valve housing, and the plunger is activated by excitation of the solenoid. It is characterized in that the valve body is pressed against the valve seat surface by protruding into the valve housing.

《Operation》 Since there is no need to install a shutoff valve in the middle of the piping, there is no need to increase the number of piping connections. Furthermore, since it is installed indoors, wiring is simple and the return operation can be performed without going outside.

<<Example>> Hereinafter, an example of this invention will be described in detail using the drawings.

Fig. 1 is an explanatory diagram of gas piping using a shutoff valve with a built-in shutoff valve (hereinafter simply referred to as a shutoff valve) 1 according to this invention, Fig. 2 is an exploded perspective view of the shutoff valve, and Fig. 3 is an exploded perspective view of the shutoff valve. FIG. 4 is a plan sectional view, and FIG. 5 is a side sectional view.

First, in FIG. 1, a gas cylinder 2, a pressure regulator 3, and a gas meter 4 are connected in series via a gas pipe 5 outdoors.

The discharge side gas pipe 5 of the gas meter 4 is drawn into the indoor room R through the outer wall 6, and the above-mentioned shutoff valve 1 is connected to the supply end thereof.

A gas stove or other gas appliance 8 is connected to the discharge port of the shutoff valve 1 via a rubber hose 7.

A detector 9 such as a gas leak alarm is arranged near the gas equipment 8, and its signal cable 10 is connected to the shutoff valve 1.

In addition, the conventional gas cutoff valve that is linked to the detector 9 is generally connected to the outdoor gas pipe 5 surrounded by A in FIG. 1 due to connection space.
The signal cable 10 was also wired to pass through the outer wall 6.

As shown in FIGS. 2 to 5, the shutoff valve 1 has a gas supply port 101 in the center of the lower rear end.
A valve housing 103 is provided with a pair of gas discharge ports, that is, a gas connection pipe 102 at the top of the tip.
A stop knob 104 is provided on each gas connection pipe 102 and constitutes a shutoff valve rotatably connected to the valve housing 103, and a solenoid 107 protrudes from the center of the front surface of the valve housing 103.

A T-shaped flow path 108 is formed inside the valve housing 103, and has one end communicating with the supply port 101 and the other end communicating with the connecting pipe 102 through each of the shutoff valves.

A nozzle 109 forming a valve seat surface is provided on the supply port 101 side of the flow path 108.
A valve body 110 protruding from the solenoid 107 is located opposite to the valve body 09.

The solenoid 107 is a directional solenoid, and includes a case 111 that is flange-coupled to the valve housing 103 and has a rear opening, a bobbin 112 fixed inside the case 111, and a solenoid coil 113 wound around the outer circumference of the bobbin 112. A magnet 114 fixed to the rear end of the bobbin 112;
The plunger 115 is inserted into the bobbin 112 and integrated with the tip of the plunger 115, and is inserted through the tip of the case 111 to form the valve housing 10.
The plunger 1 includes a valve stem 116 that protrudes into the plunger 1.
The valve body 110 is provided at the tip of the valve body 15 . A spring 117 is interposed between the valve body 110 and the valve housing 103, and constantly urges the valve body 110 in the projecting direction.

Further, a bellows-shaped valve rubber 118 is provided on the outer periphery of the valve body 110, the valve stem 116, and the spring 117.
The flange portion 118 of the valve rubber 118 is covered with
By fixing the solenoid a to the valve housing 103 together with the case 111, the solenoid 1
07 and the valve housing 103 are airtightly partitioned.

Furthermore, a return shaft 1 is provided at the rear end of the plunger 115.
19 are integrally provided. This return shaft 119
A knob 120 for return operation, which also serves as an operation display, is integrated into the rear end of the switch.

Furthermore, a transparent cover 12 is provided at the rear of the case 111.
1 is screwed and fixed, and the return knob 120 is exposed on the connecting pipe 102 side.

The aforementioned signal cable 10 is led out to the solenoid coil 117 and connected to the aforementioned gas leak detector 9.

Next, the operation of the shutoff valve 1 having the above structure will be explained.

First, to close the gas passage manually, turn the knob 10.
4, the connecting pipe 102 is closed.

Further, when a gas leak is detected by the detector 9 while the connecting pipe 102 is open, the solenoid coil 107 is excited via the signal cable 10 by the detection output, and this repulsive force and the biasing force of the spring 117 are generated. This causes the valve rod 116 to protrude, bringing the valve body 106 into contact with the nozzle 109 and blocking the flow path 108.

After checking and confirming the inspection, remove the transparent cover 121 and remove the knob 1.
20, the valve body 110 is separated from the nozzle 109.

If the gas equipment 8 side returns to normal and the indoor gas is ventilated, gas distribution will be performed normally.

If there is a leak on the equipment 8 side and ventilation is not provided, the gas flow path 108 will be blocked again by the same mechanism as described above.

<<Effects of the invention>> As explained in detail in the embodiments above, according to this invention, a gas cutoff valve function can be provided in addition to the functions of one or more conventional shutoff valves. Therefore, compared to the conventional method where each individual unit is incorporated into the gas piping, piping connections can be made more easily, there is no decrease in reliability or strength due to the increase in the number of connection points, and installation can be done at low cost. .

As shown in the embodiment, when installing the product of the present invention at the end of a gas pipe, it is only necessary to replace the conventional shutoff valve, and the wiring for the detector can be wired indoors, further simplifying the installation.

In addition, if a shutoff valve is installed on the upstream side of multiple shutoff valves as in the example, even if one of the gas appliances connected to any of them malfunctions, all of them can be shut off, allowing for common use. Can be done.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of gas piping using the shutoff valve with a built-in shutoff valve according to this invention, Fig. 2 is an exploded perspective view of the shutoff valve, Fig. 3 is a perspective view showing the assembled state of the shutoff valve, and Fig. 4 The figure is a plan sectional view, and FIG. 5 is a side sectional view. DESCRIPTION OF SYMBOLS 1... Shutoff valve with built-in shutoff valve, 101... Gas supply port, 102... Gas connection pipe (gas discharge port), 104... Knob, 107... Solenoid, 109... Nozzle, 110... Valve body, 11
5... Plunger, 120... Return operation knob, 121... Transparent cover.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A valve seat provided in the gas passage of the valve housing, one or more sockets provided on the downstream side of the valve seat,
On the side opposite to the valve seat, the valve includes a solenoid fixed to the valve housing, a plunger located at the center of the solenoid and protruding into the valve housing, and a valve body provided at the tip of the plunger,
A shutoff valve with a built-in shutoff valve, characterized in that the plunger is caused to protrude into the valve housing by excitation of the solenoid, and the valve body is urged against the valve seat surface. (2) The shut-off valve with a built-in shut-off valve according to claim 1, wherein a cover for a solenoid is located on the outlet end side of the pot. (3) The shutoff valve with a built-in shutoff valve according to claim 2, wherein the cover is a transparent cover, and a return knob integrated with the plunger and serving as a display is disposed within the cover.