JPS63140219A - Switching regulator with gas shut-off function - Google Patents

Abstract

PURPOSE:To simplify the construction work and make the device fit for a piping which has been provided and also make the confirmation of resetting simple by providing a housing into which a switching valve and gas pressure regulator are assembled in one body with a valve driving section which consists of a solenoid operated by receiving control signal from outside. CONSTITUTION:A regulator valve unit 20 is provided in a cover 50 which is shared by a shut-off valve unit 18 which covers the upper opening of a housing 14. This regulator valve unit 20 keeps the inside of a secondary pressure reducing chamber 24 always at a constant gas pressure, and the shut-off valve unit 18 has a function to open and close a flow passage 26 by outside electric signal. If the end side of a gas passage is open by, for instance, a damage in the piping or breakage in a utensil GK or other causes, there is pressure reduction in the secondary pressure reducing chamber 24 and it is detected by a lead switch R1 and by its detection signal a control section 106 maintains the shut-off state. Further, if no detection signal is generated, the flow passage 26 is completely released by outputting again resetting pulse signal after a prescribed time has passed.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a switching regulator with a gas cutoff function.

(Prior art) A switching regulator used in gas supply equipment is connected to both the used LPG cylinder and the pre-(!'fi LPG cylinder).
When the LPG cylinder in use runs out of gas, it automatically switches to the spare LPG cylinder to continue supplying gas.

The outlet side of this switching regulator is connected to end equipment through a gas meter.

By the way, recently, in addition to the alarm function at the end, there has been an attempt to further improve safety by incorporating a shut-off valve into this type of gas supply equipment to create a security system that links the alarm function with the shut-off valve. Momentum is increasing.

FIG. 6 is an explanatory diagram showing the arrangement 2 of gas piping in a conventional security system incorporating a shutoff valve.
The aforementioned switching regulator GT is installed before the piping of G cylinders 1 and 1.
is connected, and a gas cutoff valve 2 is connected via piping to the downstream side of the gas. This shutoff valve 2 is connected to a seismic sensor a distributed around the terminal gas appliance GK indoors.
, a gas leak alarm, a fire sensor C, etc., and shut off the gas based on the outputs of these sensors.

Note that in reality, not all of these sensors are provided, but only one of them is provided in many cases, and there are many cases in which they are added as necessary.

(Problem to be solved by the invention) However, if the shutoff valve 2 is incorporated into the gas piping as a single unit, new installation work is required and the cost of the work is high, so it is not suitable for general household equipment. was too expensive, which was an obstacle to its practical application.

In addition, these shutoff valves generally do not take into account the safety of return after being shut off, and have the drawback that, for example, safety confirmation operations during manual return operations cannot be easily performed by anyone but an expert.

This invention aims to solve the above technical problem, and by incorporating a shutoff valve into a switching regulator, no construction work is required for new installation, and the entire equipment can be constructed at a low cost. , and when assembling the shutoff valve to the off-N regulator, the structure is f! The purpose of the iLi is to enable reliable operation and to easily and reliably confirm return safety.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes a housing that integrally incorporates a switching valve and a gas pressure regulator, and a solenoid that operates in response to an external control signal. The present invention is characterized in that a gas cutoff section is assembled, which includes a valve drive section and a valve element that opens and closes a gas passage connecting the primary side pressure reduction chamber and the secondary side pressure reduction chamber in conjunction with the operation of the valve drive section.

(Function) The gas cutoff unit closes the valve in response to an alarm output from a control unit linked to a sensor, etc., and opens the valve in response to an alarm release output. Further, no special piping connection work for the shutoff valve is required.

(Example) Hereinafter, an example of the present invention will be described in detail using the drawings.

FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention, and FIG. 2 is a sectional view taken along the line ■--■ in FIG.

In the figure, this switching regulator forms a pair of gas-filled ports 10.10 on one side and an outlet boat 12 on the other side.
a switching valve unit 16 fixed to one side surface of the housing 14;
Shutoff valve unit 18 arranged in parallel on top of 4. It consists of a regulating valve unit 20.

The inside of the housing 14 includes a high-pressure gas downstream pressure reducing chamber 22 connected to the switching valve unit 16, a gas secondary side pressure reducing chamber 24 connected to the regulating valve unit 20, and both pressure reducing chambers 22.
, 24 are in communication with each other.

A nozzle 28 is fixed to the connecting portion of the gas flow path 26 to the primary decompression chamber 22, and a valve body 30 protruding from the cutoff valve unit 18 faces the upper part of the nozzle 28.

The switching valve unit 16 is located inside each inlet boat 1°, and includes a valve body 32 for opening and closing each supply end, and a valve body 32 for opening and closing each supply end.
A spring 34 that always biases the 1371 chain side, a plunger 32a integrally protruding from the upper part of the valve body 32, and a switching shaft 38 that integrates a cam 36 that slides on each plunger 32a, The shaft 38 is integrally protruded, and its periphery is connected to the opening periphery of the housing 14 and the cover 4.
A diaphragm 42 is inserted between the upper part of the diaphragm 42 and the cover 7IO, and presses the diaphragm 42 toward the decompression chamber 22 to reduce atmospheric pressure. and a spring 44 that balances the gas pressure, and a knob/I6 for switching operation arranged at the end of the switching shaft 38 protruding from the cover 40.

The spring 44 is set to have a spring pressure greater than that of each spring 34, and under normal conditions, each valve element can be alternately opened and closed by switching the knob 46. Then, when the pressure in the decompression chamber 22 temporarily increases, the diaphragm 42 expands and the cam reed of the cam 36 leaves the plunger 32a.
Each valve body closes a gas inlet boat 12.

In the figure, the cam lead surface of the cam 36 is connected to one plunger 3.
2a, and as a result, one valve body 32 is opened and the other is closed.

To switch the gas supply source from this state to the other one, use knob 4.
When 6 is rotated 180 degrees, one side closes and the other side slides into contact with the cam lead surface, opening the valve.

The regulating valve unit 20 is disposed within a common cover 50 with the shutoff valve unit 18 that covers the upper opening of the housing 14.

In other words, the regulating valve unit 20 is held between the peripheral edge of one recess 50a of the cover 50 to reduce the secondary side pressure v24.
and a pressure regulating diaphragm 52 that airtightly partitions the atmospheric pressure chamber side.
A spring 53 that presses the diaphragm 52 toward the decompression chamber 24 side, a pressure regulating actuation rod 54 integrally protruding from the center of the diaphragm 52, a lever 56 connected to the lower part of the actuation rod 54, and a lower end of the lever 56. It consists of a pressure regulating valve body 58 which is connected to the gas flow path 26 and is opposed to a nozzle 60 fixed to the terminal end of the gas flow path 26.

Therefore, when the gas pressure in the secondary side decompression chamber 2/I becomes higher than the spring pressure, that is, becomes higher than a predetermined pressure, the diaphragm 52 expands, and as a result, the actuating rod 54 is pulled up. The valve body 58 is moved to the closing side via the lever 56.

Moreover, when the value becomes low, the opposite operation is performed. Thereby, the secondary side reduced pressure chamber 24 is always maintained at a predetermined gas pressure.

Further, a magnet ~11 is fixed to the upper end of the actuating rod 54, and a reed switch R1 for detecting an abnormal jδ low pressure is installed inside the cover 50 facing the magnet M1.

Based on the detection output of the reed switch R+, it is possible to perform a shutoff action when the pressure is abnormally reduced, and to perform a Mi recognition operation using J5 when returning to normal operation.

The shutoff valve unit 18 is connected to the other four parts 5 of the cover 50.
Solenoid 62 housed inside 0b and solenoid 6
a plunger p64 slidably inserted into the inside of the plunger 2; a valve body 64a integrally protruding from the lower part of the plunger 64;
The above-mentioned valve body 30 is integrally provided at the lower end of the valve stem 64a, and the center is integrated with the valve body 30, and the periphery is sandwiched between the upper opening of the housing 14 and the periphery of the recess 50b, and forms the primary side decompression chamber 22. Bellows 68 that airtightly seals the inside of the recess 50b
A spring 66 is inserted between the valve body 30 and the solenoid 62 and always biases the valve body 30 toward the closed side.

The solenoid 62 includes a permanent magnet 62a and a permanent magnet 62a.
2a and an electromagnet 62b that is excited in the same direction and in the opposite direction, and the plunger 64 is spring-driven by attraction and magnetic force in the MnQh direction instantaneously generated by an external electric signal. 66, or vice versa, it is drawn into the solenoid 62 against the spring pressure, and the valve element 30 is brought into contact with and separated from the nozzle 28, thereby closing the flow path σ)1. There is.

Further, an operation confirmation reed switch R1 is disposed on the side of the solenoid 62, and is configured to detect changes in magnetic flux leaking to the outer periphery of the solenoid 62.

The reed switch R2, the reed switch R+ lead wire, and the lead wire of the solenoid 62 are connected to the cover 5.
It is pulled out to the outside through a conduit lower 0 provided on one side of the 0.

Further, a reset button 72 which also serves as a display is arranged at the upper end of the plunger 64, and its upper part is connected to the recess 5.
The top surface of 0b is covered with a transparent quilt knob 74 which is screwed into and fixed to the u DI2 nJ function.

Figure 3 shows a switching regulator valve GT with a gas cutoff function configured as above.
FIG. 1 is a schematic explanatory diagram showing an example of the piping and wiring system of the Segurifui system using

In the figure, two LPG cylinders 1 are connected to an inlet boat 10 of the switching regulating valve GT, and an outlet port 12 is connected to two LPG cylinders 1.
A gas equipment GK at the end of G is connected to the full meat R side which is downstream of the gas.

Also, on the blank side, there is a seismic sensor 100. Gas leak alarm 102
, sensors such as a fire sensor 104, and a control unit 106 for these sensors are arranged.

The lead wires of the reed switches R+, R2 and the solenoid 62 are connected to the input and output terminals of the ill 1 section 106.

The operation of the gas security system having the above configuration will be explained using the flowchart shown in FIG.

[Gas cutoff action] When at least one of the sensors or the reed switch R+ generates a detection signal (step 1), the control unit 106 controls each of the sensors 100°102.104ct.
Steps 2 and 3) take in the signals from J and reed switch R1, generate an alarm output according to each state, and at the same time output a cutoff pulse signal to the solenoid 62.
.

As a result, the switching regulator GT blocks the gas flow path. This state is detected by the reed switch R2, and the detection output is displayed on the display unit attached to the control unit 106, thereby allowing the 1.4 disconnection position to be confirmed (step 4).

[Returning action] By removing the cause detected by each sensor 100, 102, 104 or reed switch R1,
The alarm output is turned off (step 5).

Next, when a reset button or the like provided on the control unit 106 is pressed, the control unit 106 outputs an l1lffi pulse signal having a polarity opposite to that of the cutoff pulse signal to the solenoid 62, and a magnetic field with a polarity opposite to the above (J) is generated. flows instantly,
The plunger 64 is re-adsorbed, and the valve body 30 is separated from the nozzle 28 to open the flow path (step 6).

The control unit 106 sends out this signal for about 33 sec, then outputs a cutoff pulse again at that moment, and maintains the state for about 30 sec ~
Hold 2M1n (step 7.8°9).

Here, if the gas terminal side is released for some reason, such as damage to the piping, damage to the appliance GK, or falling off of the rubber hose, there will be a pressure drop in the secondary side decompression chamber 24, so the reed switch R1 detects this, and the control unit 106 maintains the cut-off state based on this detection signal (step 1
0).

Further, in a state where there is no abnormality, that is, when the detection signal is not generated, a return pulse signal is output again after a predetermined period of time has elapsed, and the flow path 26 is completely opened (step 11). 12).

Thereafter, the process returns to step 1 and monitoring continues in the same work procedure as described above.

If by this time the reset and return safety confirmation operations cannot be performed automatically due to a power outage, etc., the flow path can be re-opened by opening the transparent cap and pulling up the reset button 72, or manual safety confirmation can be performed. can.

Next, FIG. 5 is a sectional view showing a second embodiment of the present invention.

At J3 in the figure, a switching valve unit 16 and a regulating valve unit 20 are arranged in parallel on the upper part of the housing 14, and a cutoff valve unit 18 is arranged on one end face of the housing 14, and the valve The body 30 is opposed to a nozzle 28 provided at the end face of a gas flow path 26 that opens on the side surface of the primary side decompression chamber 22.

In this embodiment, compared to the first embodiment, only the positions of the switching valve unit 16 and the shutoff valve unit 18 are switched, but this structure is similar to that of the switching regulating valve previously developed by the applicant. Since the configuration is such that only the cutoff valve unit 18 is added to the structure, it is highly compatible.

Further, its operation is the same as that of the first embodiment, so detailed explanation thereof will be omitted.

(Effects of the Invention) As explained in detail in each of the embodiments above, this invention has the following advantages: Compared to the conventional independent shutoff valve opening groove, the piping connection is not complicated, the construction is simple, and it is safe. The total cost for ensuring performance can be reduced.Also, since it can be replaced with an existing regulating valve, it can be easily adapted to existing piping.

Further, in this invention, since the pressure reduction state detection means is provided in the regulating valve conit, there is an advantage that return confirmation can be easily carried out.

Figure 2 is a vertical cross-sectional view of the switching regulator with the function ζ.
-■ line sectional view, Figure 3 is a schematic explanatory diagram showing the piping and wiring system of the Security System using the switching regulator with gas cutoff function, Figure 4 is a flowchart for explaining the operation,
FIG. 5 is a cross-sectional view of the second embodiment of the present invention, and FIG. 6 is an explanatory diagram of the gas piping and the wiring of the safety mechanism in a conventional security system.

14...Housing 16...Switching valve unit 18...Shutoff valve unit 20...Adjusting valve unit 22...Primary side pressure reduction chamber 24...Secondary side pressure reduction chamber 26...Gas flow Path 30... Valve body 62... Solenoid R+, M+... Means for detecting reduced pressure state (R+... Reed switch, M+... Magnet 1~) R2... Means for detecting operating state (Reed switch)
11 representatives (patent attorney Yasuo Miyoshi) 32 times

Claims (3)

[Claims] (1) A housing that integrates a switching valve and a gas pressure regulator has a valve drive section consisting of a solenoid that operates in response to an external control signal, and a primary side decompression chamber that is linked to the operation of the valve drive section. 1. A switching regulator with a gas cutoff function, characterized in that a gas cutoff section is assembled, which is made up of a valve body that opens and closes a gas flow path connecting a secondary pressure reduction chamber and a gas flow path. (2) The gas pressure regulator is provided with a detection means for detecting the depressurized state of the secondary side decompression chamber, and the gas cutoff section is opened/closed in accordance with the detection output of the detection means. A switching regulator with a gas cutoff function according to claim 1, characterized in that: (3) A switch with a gas cutoff function according to claim 1 or 2, characterized in that an operation detection means for detecting changes in magnetic flux in response to opening/closing operations is provided near the solenoid. regulator.