JPH0736218Y2 - Gas pipe branch structure using shutoff valve - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a branch structure of a gas pipe using a cutoff valve having a fuse function for closing an abnormal outflow of gas.

[Conventional technology]

A method of branching a gas pipe with a multi-plug branch header and piping it to a plurality of places in one house is known. This allows the use of various gas appliances, such as cooking appliances and heating appliances, in many places in a home.

In such a gas pipe, the conventional multi-plug branch header merely branches. And, for example, a fuse cock that closes the gas as a safety device in the event of an excessive outflow when the piping of the gas appliance is disconnected is built in the box cock of the gas supply piping terminal, and the box cock is attached to the indoor wall. Thus, the box cock was regarded as a gas supply pipe.

[Problems to be solved by the device]

However, in such a piping system, the box cock and the upstream side of the box cock need to be strong pipes (gas supply pipes) so as to withstand the gas pressure. Therefore, there is a problem that the piping work is complicated and the construction cost is high.

The present invention has been made in view of the above facts, and an object thereof is to provide a branch structure of a gas pipe using a shutoff valve having a fuse function that can be used as a multi-plug branch header section.

That is, by using the shutoff valve as a branch header of the gas supply pipe terminal, it is possible to use a flexible pipe with easy piping downstream from the shutoff valve and facilitate piping work.

[Means for Solving the Problems]

In order to achieve the above object, a branch structure of a gas pipe using a shutoff valve of the present invention comprises a shutoff valve connected to a gas supply pipe side, and a pipeline connected to an outlet of the shutoff valve. A gas outlet provided at the tip of the conduit and a switch means provided at the outlet for turning on and off by connecting and disconnecting the outlet, the shutoff valve forming a valve chamber inside, A valve body having an inlet at the lower end side of the valve chamber and an outlet at the upper end side, an outlet side valve seat provided between the inlet and the outlet in the valve chamber, and an inlet side valve provided below the outlet side valve seat. A seat, a connecting / disconnecting pin whose tip portion advances and retreats in an opening portion of the valve seat on the upstream side of the inlet side valve seat, and a position at which the valve closes by abutting one of the valve seats in the middle of the valve seats. And one of the positions where both the valve seats are opened by making contact with the connecting / disconnecting pin. Ball valve body,
A plunger movable toward and away from the ball valve element from above to move it from a retracted position where the ball valve element contacts the outlet side valve seat to a protruding position where it contacts the inlet side valve seat, and the plunger provided at the upper end of the valve chamber An ON / OFF signal of the switch means is applied to the solenoid of the shutoff valve, and the plunger is moved to the retracted position by the excitation of the solenoid by the ON signal. When the valve seat is opened and the solenoid demagnetizes in response to the OFF signal, the plunger moves to the projecting position, so that the ball valve closes the inlet side valve seat and gas is released when both valve seats are open. The ball valve body has a structure that closes the inlet side valve seat when the excessive outflow is abnormal.

[Action]

To open and close the shutoff valve, simply send a return electric signal (ON / OFF signal) to the solenoid. In the event of an excessive outflow, the ball valve element presses against the outlet side valve seat due to gas pressure and automatically closes and shuts off. Since the circuit becomes unnecessary, the control circuit can be simplified and the cost can be reduced.

When an excessive outflow occurs, for example, the hose disconnected from the gas appliance is reconnected, and the outlet (see FIG. 3) is only attached and detached once to return to the valve open state. That is, since the operating energy for opening the valve may be small, the solenoid can be downsized. Further, since the ball valve element is used, the valve element itself can be downsized, and the solenoid valve can be downsized, and the shutoff valve as a whole can be downsized.

Further, the gas can be shut off at all times except when gas is used, and high pressure gas pressure can be prevented from being applied to the pipe from the shutoff valve to the outlet. Therefore, the selection range of the piping material is expanded, the piping work is simplified, and the piping cost can be reduced.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, 1 is a main body of a shutoff valve used for a gas pipe, etc., 1a is a valve chamber, 2 is a gas inlet, which is formed below the main body 1 in the figure, and 3 is an outlet, which is formed above the main body 1. Has been done.

Two valve seats, an outlet side valve seat 11 and an inlet side valve seat 12, are formed in the valve chamber 1a, and the inlet side valve seat 12 is on the lower side. Double valve seat 1
A spherical ball valve element 13 is provided between 1 and 12, and can be pressed against both valve seats, and the valve is closed by the pressure contact. A connecting / disconnecting pin 15 is provided on the upstream side of the inlet valve seat 12 with its tip facing the opening of the inlet valve seat 12. The contact / detachment pin 15 is urged by the spring means 14 'in a direction away from the ball valve body 13. Outlet side valve seat
A plunger 7 and a solenoid 8 are provided on the downstream side of 11. The plunger 7 is projected by the spring means 14 when the solenoid 8 is demagnetized, and pushes down the ball valve 13 from above to make it contact the inlet side valve seat 12 against the connecting / disconnecting pin 15 (first fuse). function). Also, the solenoid 8
The plunger 7 is attracted by the excitation of and is moved to the retracted position as shown. In this way, the ball valve body 13 moves from the state in which it is in pressure contact with the outlet side valve seat 11 in the figure to the position in which it is in pressure contact with the inlet side valve seat 12 as the plunger 7 advances and retracts or moves up and down.

Reference numeral 9 is a signal line for applying an ON / OFF signal to the solenoid 8. Reference numeral 10 denotes a cock knob, which is a manual valve that opens and closes the inlet 2 by rotating the closure 10a by turning it by hand.

Next, the operation of the shutoff valve will be described.

First, it is assumed that a gas supply pipe (not shown) serving as a gas supply source is connected to the inlet 2 of the shutoff valve 1, and a pipe (hose) on the gas appliance side (not shown) is also directly connected to the outlet 3.

In this case, since the outlet described later is not connected and the switch (reference numeral 18 in FIG. 3) is in the off state,
An off signal is applied to the solenoid 8 through the signal line 9. As a result, the solenoid 8 is demagnetized, and the attraction force to the plunger 7 does not work. Therefore, the plunger 7 is projected by the force of the spring means 14 to bring the ball valve element 13 into contact with the contact / disconnection pin 15 and to resist the spring means 14 '. And presses it against the inlet side valve seat 12. Therefore, the spring means 14 is stronger than the spring means 14 ', so that the valve can be closed.

That is, when the shut-off valve 1 is unused or the outlet is not connected or disconnected, the outlet switch is off, and the first fuse function keeps the valve closed and closes the branch pipe base.

On the other hand, when the switch of the outlet on the outlet 3 side is turned on (the outlet is inserted), that is, when the shutoff valve 1 and the gas appliance are properly connected via the outlet, an ON signal is sent to the solenoid 8 by the signal line 9. Is applied. Then, the solenoid 7 is excited and the plunger 7 is attracted and held at the retracted position. The ball valve body 13 is pressed by the spring means 14 ', separated from the inlet side valve seat 12, and put on the tip of the connecting / disconnecting pin 15. In this state, both valve seats 11 and 12 are opened, and gas flows from the inlet 2 to the outlet 3 and is supplied to the device. When the cock of the gas appliance is closed and the gas flow is stopped, the ball valve body 13 falls by its own weight.

When using a gas appliance, if the pipe on the outlet side (gas appliance inlet side) is disconnected, such as when a child puts his / her foot on it and disconnects the gas pipe, the gas spouts vigorously from the outlet side, and then passes. It becomes an outflow abnormality.

At that time, if the outlet is in the connected state, the plunger 7 is still in the retracted position and the ball valve element 13 is sucked up by the rapid flow of gas, so that the plunger 7 is pressed against the outlet side valve seat 11 to close. That is, the second fuse function operates. Even after that, the gas pressure keeps contacting the outlet side valve seat 11 and the valve closed state is maintained.

When the gas appliance is no longer in use, the conduit of the gas appliance is removed, and the outlet switch is turned off, the first fuse function shuts off the switch, providing a safety device against forgetting to close the main plug.

Next, the branch structure of the gas pipe using the above shutoff valve will be described with reference to FIGS. 2 and 3.

FIG. 2 is a diagram of a gas piping terminal portion. A gas outlet that can be attached and detached with a single touch is used at the pipe connection. 16 is the male side of the outlet and 17 is the female side of the outlet.
The piping can be connected with one touch. In addition, since there is a clear fitting feeling when connecting, a connection failure can be prevented. The left side of the drawing of the male side 16 of the outlet is connected to the outlet 3 of the shutoff valve of FIG. And this male side outlet 16 is arranged on the wall in the room. The female side 17 of the outlet is provided at a terminal such as a gas hose on the gas appliance side. Reference numeral 18 is a switch means, which is turned on and off by connecting and disconnecting the outlet, and applies the on and off signals to the solenoid 8 as described above.

FIG. 3 shows the entire branch structure of the gas pipe. Instead of the conventional multi-line branch header, the same number of shutoff valves 1 as the number of branch pipelines are provided. As an installation site, the outer wall 21 of the building is usually used for easy maintenance. Piped from each outlet 3 of the shutoff valve as shown by the one-dot chain line,
The male side of the outlet is arranged on the inner wall 22 of the room. The female side 17 of the outlet provided on the hose 19 of the gas appliance is connected if necessary. The signal line 9 of each shutoff valve is put together and connected to the controller 20. A power source such as a battery is also housed in the controller 20, and electricity required for the signal line is supplied.

Next, the operation of the branch structure of the gas pipe will be described.

When the male and female sides 16 and 17 of the gas outlet are connected, the switch means 18 detects and an electric signal (ON signal) is sent to the solenoid 8 of the shutoff valve. The shutoff valve performs the operation of opening the valve shut off by the first fuse function, that is, the return operation by the electric signal as described above.

When the connection of the outlet is abruptly released, the gas supply is immediately cut off by the second and first fuse functions.

If the shutoff valve is installed outdoors, the gas can always be shut off outdoors in the event of an abnormal outflow.

[Effect of device]

As described above, according to the branch structure of the gas pipe of the present invention, by simply connecting the shutoff valve and the gas appliance with a coin equipped with a switch means, a return electric signal is sent to the solenoid, and an overflow occurs. When an abnormality occurs, the valve is automatically closed and the shutoff circuit is not required. Therefore, the control circuit can be simplified and the cost can be reduced.

When an excessive outflow occurs, for example, the hose disconnected from the gas appliance is reconnected, and the outlet is returned to the valve open state only once by attaching and detaching the outlet. That is, since the operating energy for opening the valve may be small, the solenoid can be downsized. Further, since the ball valve element is used, the valve element itself can be downsized, and the solenoid valve can be downsized, and the shutoff valve as a whole can be downsized.

According to the branched structure of the gas pipe of the present invention, the gas can be shut off at all times except when gas is used, and high pressure gas pressure can be prevented from being applied to the pipe from the shutoff valve to the outlet. Therefore, the selection range of the piping material is expanded, the piping work is simplified, and the piping cost can be reduced.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of the present invention, FIG. 2 is a sectional view showing a relationship between a gas outlet and a switch means, and FIG. 3 is a perspective view of a branch structure of a gas pipe using a shutoff valve of the present invention. It is a figure. 1 ... shut-off valve body, 1a ... valve chamber, 2 ... inlet, 3 ... outlet, 7 ... plunger, 8 ... solenoid, 9 ... signal line, 11 ... outlet side valve seat, 12 ... Inlet side valve seat, 13 ... Ball valve element, 14,14 '... Spring means, 15 ... Separating / connecting pin, 16,17
…… Gas outlet, 18 …… Switch means.

Claims (1)

[Scope of utility model registration request] 1. A shutoff valve connected to a gas supply pipe side,
A conduit connected to the outlet of the shutoff valve, a gas outlet provided at the tip of the conduit, and a switch means provided in the outlet for turning on and off by connecting and disconnecting the outlet, The shutoff valve has a valve chamber formed therein, an inlet is provided at a lower end side of the valve chamber, an outlet is provided at an upper end side thereof, an outlet side valve seat provided between an inlet and an outlet in the valve chamber, and An inlet-side valve seat provided below the outlet-side valve seat, a connecting / disconnecting pin whose front end advances and retreats from the opening portion of the valve-side seat on the upstream side of the inlet-side valve seat, and both valves in the middle of the both valve seats. A ball valve body which is alternatively selected to a position where it abuts against either one of the seats to close the valve and a position where it abuts against the separation / contact pin to open both valve seats;
A plunger movable toward and away from the ball valve body from above to a protruding position where the ball valve body contacts the outlet side valve seat and a protruding position where the ball valve body contacts the inlet side valve seat; and the plunger provided at the upper end of the valve chamber An ON / OFF signal of the switch means is applied to the solenoid of the shutoff valve, and the plunger is moved to the retracted position by the excitation of the solenoid by the ON signal. When the valve seat is opened and the solenoid demagnetizes in response to the OFF signal, the plunger moves to the projecting position, so that the ball valve closes the inlet side valve seat and the gas is released when both valve seats are open. 2. A branch structure of a gas pipe using a shutoff valve, characterized in that the ball valve body closes an inlet side valve seat in the event of an excessive outflow of.