JPH07895Y2 - Gas meter for security system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a membrane gas meter provided with a security function.

(Prior Art) Membrane gas meters provided with a security function are roughly classified into the following types.

A built-in shutoff valve that automatically operates the shutoff valve in response to an external signal to close the gas inlet port.

A built-in sensor for automatic meter reading, this is counted by the accumulating means provided in the automatic transmission controller, and the value is reported to the distribution center via the telephone line.

A product that incorporates a microcomputer to make a logical judgment of the gas distribution state.

A combination of the above items.

In any case, gas meters incorporating this type of security function are connected to the gas leak alarm, shut-off valve controller, automatic transmission controller connected to the telephone line, etc. via lead wires, and shut off. By constantly reporting various information such as gas distribution status and integrated value to the distribution center via the telephone line, the gas usage status of each home is constantly monitored.

(Problems to be solved by the invention) However, in this type of gas meter, if the lead wire, which is the connection end with these external devices, is directly drawn out of the device, the There was a problem.

If the gas meter is provided with a terminal block for external connection, this terminal block is provided so as to project to the front of the case, that is, the lower part on the integrated display surface side, so that it can be installed with a high degree of workability such as connection work. However, it looked bad and the cost per meter was high.

In particular, in the upper case of the gas meter incorporating the shutoff valve, as shown in FIG. 5, the partition wall 1 accommodates the integrating meter chamber 2, the gas inlet port 3, the gas outlet port 4, the shutoff solenoid 5 and the electric circuit. Is divided into the circuit room 6
The solenoid 5 and the lead wire 8 of the electric circuit are drawn out from the back surface of the upper case.

On the other hand, when the terminal block 9 is arranged on the front surface of the case, it is necessary to connect the lead wire 8 to the terminal block 9 while being routed around the case, which leads to an increase in the number of assembling steps.

Furthermore, even a gas meter equipped with this type of security function may not always be combined with other external equipment,
There is a case where the terminal block 9 is not connected to the line but only functions as an original gas meter, and a combination may be made in the future. However, when the terminal block 9 is exposed on the front side in this way, it is rather an obstacle. Become.

This invention solves the above-mentioned drawbacks, and by arranging the terminal block on the back surface of the case, it solves the problem of the wiring layout of the devices arranged inside the gas meter, and it is cheap in cost. It is an object of the present invention to provide a gas meter for a security system whose appearance can be improved.

[Means for Solving the Problems] (Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention includes an upper case provided with a measuring mechanism and a gas inlet / outlet port, and a membrane plate for supplying / discharging gas. A security that consists of a lower case and a shut-off valve that closes the gas inlet side nozzle inside the upper case, and a circuit that is electrically connected to the shut-off valve and other equipment to interlock with external equipment. In the system gas meter, the external connection end of the internal circuit is pulled out to the rear surface of the upper case, and is connected to a terminal block arranged on the rear surface of the upper case and covered with a cover, and one end is connected to the terminal block. Through the lead wire,
The internal circuit and the external device are connected to each other.

(Operation) According to the above configuration, the external connection end of the internal circuit is pulled out to the rear surface of the upper case, and this external connection end is connected to the terminal block arranged on the rear surface of the upper case. There is no problem on the top, assembly cost can be reduced,
The appearance is also tidy.

(Embodiment) An embodiment of the present invention will be described in detail below with reference to the drawings.

1 to 4 show a gas meter for a security system according to the present invention. The gas meter has a film plate (not shown) that expands and contracts due to gas absorption and discharge, a link that interlocks with the film plate, a rotation conversion mechanism, and the like. Lower case
10 and the upper case, which is flanged to the upper part of the lower case 10.
It consists of 12.

As shown in FIG. 4, the upper case 12 includes a partition wall 14 for integrating a meter chamber 16, a gas inlet port 18, a gas outlet port 20 and a shutoff solenoid 22, unillustrated sensors for automatic counting, a power source, and electricity for these. Circuit room containing the circuit
The terminal block fixed to the back of the cover 28 is divided into 24 and the solenoid 22 and the lead wire 26 of the electric circuit are pulled out to the back of the upper case 12 through a cover 28 provided on the back.
Connected to 30.

A plunger 22a projects from the solenoid 22, and a valve body 22b provided at the tip of the plunger 22a faces a nozzle 18a provided near the gas inlet port 18.

The rear surface of the terminal block 30 is covered with a terminal block cover 32, and when connecting to an external device through the lead wire 34, remove this cover 32, and again connect with the terminal of the corresponding number with the cover 32. The wiring connection work is completed by covering the terminal block 30.

Therefore, as shown in FIG. 1, there is nothing other than the integrated display surface 36 on the front surface of the gas meter, and the lead wire connected to the wiring is also located on the rear surface side of the gas meter, so that the appearance is neat.

In the above configuration, when a shutoff pulse signal is input from the shutoff valve controller 40 to the solenoid 22 through the lead wire 34, the plunger 22a of the solenoid 22 projects, pressing the valve body 22b against the nozzle 18a and shutting off the gas flow path.

In response to this cutoff signal, the gas meter also sends a signal to the automatic transmission controller 42 through the signal lead wire 34, and the controller 42 logically judges this state and makes a monitoring line provided on the distribution center side through the telephone line 44. The signal is transmitted to the computer 46.

Then, in response to the alarm issued from the computer 46, a staff member is dispatched to the corresponding gas meter installation place to perform the recovery of the abnormal state and the interruption release operation, whereby the safety can be maintained.

Further, the count value from the counting sensor is constantly input to the automatic transmission controller 42, and this count value is also transmitted to the monitoring computer 46 provided on the distribution center side through the telephone line 44.

In the case of the LP gas supply system, the amount of consumption is determined, the replacement time is calculated, and the container is replaced and delivered.

(Effect of the Invention) As described in detail in the above embodiments, in the gas meter for a security system according to the present invention, the external connection end of the internal circuit is pulled out to the rear surface of the upper case, and the external connection end is connected to the upper case. Since it is connected to the terminal block arranged on the back surface of the device, there are no problems in routing the wiring of the internal circuit, there is an advantage that the assembling cost can be reduced, and the appearance is neat. Furthermore, the parts can be shared with a conventional gas meter that is not linked to the security system.

[Brief description of drawings]

1 is a front explanatory view of a gas meter for a security system according to the present invention, FIG. 2 is a side view of the same, FIG. 3 is a plan view, FIG. 4 is a sectional view taken along line IV-IV of FIG. 1, and FIG. FIG. 4 is a plan sectional view of a conventional gas meter for a security system. 10 …… Lower case 12 …… Upper case 18 …… Gas inlet port 18a …… Nozzle 20 …… Gas outlet port 22 …… Gas shutoff solenoid 22a …… Plunger 22b …… Valve 26 …… Lead wire (internal circuit) ) 30 …… Terminal block 32 …… Terminal block cover 34 …… Lead wire (for external device connection) 40,42 …… External device (40 …… Shutdown valve controller, 42 …… Automatic transmission controller)

Claims (1)

[Scope of utility model registration request] 1. A shutoff which comprises an upper case provided with a metering mechanism and a gas inlet / outlet port, and a lower case provided with a membrane plate for supplying / discharging gas, and which closes a gas inlet side nozzle inside the upper case. In a gas meter for a security system, which is provided with a valve and has an internal circuit that is electrically connected to this shut-off valve and other devices and works in conjunction with an external device, the external connection end of the internal circuit is provided on the rear surface of the upper case. It was pulled out and connected to a terminal block arranged on the back surface of the upper case and covered with a cover, and the internal circuit and the external device were connected via a lead wire having one end connected to the terminal block. A gas meter for a security system, which is characterized in that