JPS59170579A - Electrically powered valve - Google Patents

Abstract

PURPOSE:To enable an emergency valve closure with an economical device in an electrically operated valve which is reduced its rotation by an electric motor and has electrical control means by constructing same in such a manner in which the motor is actuated by a battery as a power source in case of an emergency so that the valve may be closed. CONSTITUTION:When a switch S1 is turned on when contact points CR1-1, CR1-2 of a relay CR1 are closed and contact points CR1-3, CR1-4 are opened, contact points CR2-2, CR2-3 of a relay CR2 are closed to cause the valve to be fully opened by a DC motor M. When a power stoppage occurs under such condition, said contact points CR1-1, CR1-2 are opened, and the contact points CR1-3, CR1-4 are closed. Then, even if the switch S1 is turned on, the relay CR2 is deenergized, and its contact points CR2-2, and CR2-3 are opened. And, the (+) side of the power source is inputted to a terminal M2 of the DC motor via a diode D and the contact point CR1-3, while the (-) side is inputted to a terminal M1 through a limit switch LSs, and the DC motor M is actuated to close the valve.

Description

[Detailed description of the invention] The present invention is a power outage device used for a gas supply main valve, etc.

Electric valve 5 that automatically closes or closes in the event of an emergency such as an earthquake It concerns the structure of pulp.

Conventionally, there have been two methods for automatic valve operation in emergencies: one using a cylinder type operating device, and the other using an electric type operating device with a spring. The former is operated by 9 atm pressure or hydraulic pressure in one direction of opening or closing, and the opposite direction is operated by a spring force built into the cylinder. Air or hydraulic pressure is operated by an external solenoid valve. controlled. The latter is driven in one direction by an electric motor, and at the same time, a spring wound into a spiral wound is wound up by the force of the electric motor, force is stored in the spring, and the drive in the opposite direction is driven by the force of the spring.

ing. The cylinder method uses an external pressure source.

This requires a compressor, etc., and when you consider the equipment cost of the pressure source, it becomes expensive and also requires air pressure.

In this case, the exhaust noise is loud and is not environmentally friendly. - In the conventional one-way electric method, the torque of the electric motor must satisfy the torque required to open and close the valve and the torque required to wind up the spiral spring. Approximately twice as much torque is required. Furthermore, after winding up the spring, a device for holding the spring force and a device for releasing the holding device for moving the operating device using the spring force in an emergency are required, resulting in a large size and high cost.

Therefore, the object of the present invention is to overcome the conventional problems.

The purpose of this invention is to provide an automatic valve with an emergency operation circuit that is cheaper and smaller than automatic valves that can operate in an emergency.

shall be.

The present invention decelerates the rotational force of the electric motor and outputs it to the output shaft,
In an electric pulp having an electric operating machine whose output shaft stops the motor at a predetermined position, the electric operating machine receives an external AC power and converts it into DC.

circuit, an electric motor 2 driven by the DC circuit and the source circuit;
A control circuit disposed between the DC power supply and the motor, and configured to change the polarity of the DC power supply to the motor in response to a signal from an external source, thereby causing the motor to rotate forward or reverse; A rechargeable battery connected to a circuit that receives alternating current power and converts it to direct current; when the external alternating current power source is cut off, the battery is connected to the motor to supply power so that the pulp rotates in the closing or opening direction. It is composed of circuits to do this. In addition, this circuit had a circuit that could simulate cutting off the external AC power supply, and when a current larger than the specified current in the motor was flowing, the circuit was opened and the power to the motor was cut off. .

A circuit is installed in the circuit and a circuit in the control circuit to remember that the external AC power supply has been cut off, so that even when the external AC power supply is restored, the state at the time the power supply was cut off is maintained and a signal is transmitted from the outside.

The motor will rotate forward and reverse only after inputting the number.

It is desirable to provide a circuit configured to return the control circuit to the state before the external AC circuit was cut off.

t,).

The present invention will be explained below based on examples. No.

Figure 1 shows the construction tower of the present invention that is closed in the event of an emergency.

The basic circuit of the electric actuator is shown below. In FIG. 1, the area within the broken line indicates the inside of the electric operating machine, and terminals 1 and 2 are connected to an external AC power source. Tr is a power transformer, which lowers the power supply voltage to a specified voltage. CR1 is a relay coil, and is always activated when voltage is output from the external AC power source 5. CR2 is also a relay coil, and is controlled by the external switch S1 and the contact point of the relay CR1 (,'R1-1, and the relay C
When I is activated, it is controlled only by switch S1. Tr is a transformer, which reduces the external AC voltage to a specified voltage and obtains a DC voltage through the rectifier circuit 1. L, 5o, and L5s are turned off when fully open and fully closed, respectively.

It is a microswitch that turns the electric motor M on and off. The rectifier circuit 2 can be charged via a resistor R1.

5 diodes D are connected in parallel with the battery and the resistor R1 is connected in parallel with the battery.

Ru. Relay contacts C'R1-1 and C'R1-2 are relay C
R1's child.

A contact that closes only when the coil is energized.

CR1-5, CR1-a are relays ('R1 coil is energized.

It is a contact that closes only when it is not in use. Same reef.

Relay contacts C'R2-2 and CR2-5 are relay CR2
It is a contact that closes only when the coil is energized.

CR2-1 and CR2-a are contacts that close only when the coil of relay C'R2 is not energized. Also, DC motor M
The wiring is such that when the + side is connected to terminal M1 and one side is connected to terminal M2, the valve opens, and conversely, when one side is connected to terminal M1 and the + side is connected to terminal M2, the valve is closed.

Next, regarding the operation button, FIG. 1 shows the electric valve when it is closed. Figure 2 shows the operation of the IJ mitt switch connected in series to the DC motor H, as shown in Figure 2.

When fully closed, limit switch LSo is turned off and LSs.

It's in there. Therefore each limit switch.

CH LSo is in a conductive state, and L and s are in a non-conductive state.

this.

In this state, when you first turn on the AC power, relay CR1 (1'
) 5 coil is energized, contact CR1-1 of relay CR1
, CR1-2 close, and at the same time C'R1-5, C'R
1-a is opened. .

At this time, when switch S1 is turned on, relay CR2 is activated.

relay C'R2 contacts CR2-2,C
R2-5° are each closed and connected from the + side of the rectifier circuit 1 to the contact (,
"R1-2, 1° is applied to terminal M1 of DC motor M through CR2-2 and LSO, while from one side of rectifier circuit 1 is applied to terminal M2 of DC motor H through contact CR2-3, operates to open a valve, and when it is fully open.

IJ Mitswitch LSn opens and DC motor M stops.

Next, when the switch S1 is turned off when fully open, the relay C"R2
The current to the coil is cut off and the contact of relay CR2 (, ”R
2-2゜C'R2-3 is open and the contact (,"R2-1,
C'R2-a is closed.

When fully open, each limit switch is LSo.
7. The circuit is open, and L and Ss are closed. Hence the rectifier port.

The + side is applied from the + side of path 1 to the M2 terminal of the DC motor M through contacts C''1-(1-2 and C'R2-1), and the contact from the - side.

C'R2-a, DC motor through limit switch LSs.

One side is applied to the terminal M1 of the machine M, and the DC motor operates to close the valve, and then fully opens.

The switch L5s is opened and the DC motor M stops. .

On the other hand, charging current always flows from the rectifier circuit 2 to the battery via the resistor R1. The resistor R1° suppresses the charging current to a low level, so that even if it is constantly charged, it will not work.

This is to prevent overcharging. A diode D is provided in parallel with the resistor R1 so that the signal is output through the diode D when outputting from the battery.

Next, the operation during a power outage will be explained. If we consider a case where a power outage occurs when electric pulse 5 is fully open, current will no longer flow to the coil of relay CR1, and contact C'' of relay CR1
R1-1, (,'R+-2 are opened, and at the same time, contacts (,'R1-5, C'R1-a are closed. At this time, even if switch S1 is on, the coil of relay C'R2 is closed. The current 8 stops flowing, and the relay cR2 contact (, 'R2-1,
CR2-ai closes, and at the same time contacts CR2-2,
CR2-3 is open/omitted. And the + side of the battery is diode D, contact.

The voltage is applied to the terminal M2 of the DC motor M through CR1-3, and one side of the battery is connected to the contact C"R1-4, +); the switch L5s.

is applied to the terminal M2 of the DC motor M through the DC motor M, and the electric pulp of the DC motor M is operated to close the valve.

When fully closed, limit switch L5s opens and DC motor M
and stop. Of course, even if a power outage occurs while the electric pulp is at any opening other than fully closed, the electric pulp will be fully closed in the same way. Do it like this.

If the fluid flowing through the pulp is a dangerous fluid such as gas.

Because electric pulp automatically closes due to power outage.

The safety of the piping system can be ensured. In Fig. 3, an external switch s2 is provided which opens in the event of an emergency such as an earthquake, and the electric pulp valve can be closed even when the switch S2 is opened during a power outage.

FIG. 4 shows an embodiment according to claim 2, in which a switch s3 that can be manually opened is provided in series with an external AC power source. The electric pulp of the present invention is usually used for a long period of time in a fully open or fully closed state, so it is particularly suitable for sliding parts of mechanical parts.

That's not desirable. Therefore, it occurs suddenly.

It is desirable to have a mechanism to periodically check operation in case of an emergency. Switch S5 is manual.

artificially creating a power outage or emergency situation.

This is an effective method because it allows you to

FIG. 5 shows an embodiment according to claim 3'fj4, in which an overcurrent prevention relay O is connected in series with a DC motor M.
tl used in the present invention.

The motive is a DC motor, and when the motor locks.

A current approximately 5 times the rated current flows. The overcurrent prevention relay U operates with a current that is 60 to 70% of the current at the time of d-lock, and protects the DC motor M. All other mechanisms are the same.

5 FIG. 6 is an embodiment of claim 4.

A set coil S of the keep relay CRs is connected in parallel with the relay contacts (,'R1-5 and contacts CR1-a).

The keep relay C'Rs has a set coil S and a reset coil R, and when a single or pulse voltage is applied to the set coil S, the contact CR1r-1 opens.

A constant or pulsed voltage is applied to the reset coil R.

When the voltage is applied, the contact CR3-1 closes. therefore.

The relay can remember that voltage has been applied to the cent coil S. In Fig. 6, resistor R2 and capacitor C form an integrating circuit, which is used in case of emergency.

Or, during a power outage, relay contacts CR1-3, (, 'R1-a close.

Voltage begins to be applied from the battery, and after a certain period of time the key is pressed.

A voltage necessary for operation is applied to the set coil S of the prelay C'Rs. This is foreign.

- Keep relay (to prevent R3 from malfunctioning).

It was established. Also, resetting the keep relay CR3.

The coil R is connected to the + side of the rectifier circuit 2 via the switch S4, which is always open, and is kept open.

A contact CR3-1 of the relay CR3 is connected in series to the supply port 5 of the rectifier circuit 1.

To explain the operation of this embodiment, in the event of a power outage or emergency, relay contacts C'R1-5, CR1-a, C7?1-
s is closed, current flows from the battery through the diode D, through the resistor R2, and the capacitor C is charged.
The voltage between the terminals of the keep relay CRs set coil.

Set when sufficient voltage is reached for LeS to operate.

Coil S has activated and a power outage or emergency has occurred.

At the same time as the memorization, the contact CR5-1 is opened. Electric motor M
As in other embodiments, the valve is fully closed or fully open.

Stop. Next time the external power is restored, the key is turned off.

Since contact C'R5-1 of relay C'RS remains open.

In case of power outage or emergency, regardless of the operation of switch S1.

The position of the pulp can be maintained. Next is Sui.

When the switch S4 is closed, a voltage is applied to the reset coil R of the keep relay CR5, the contact CR5-1 of the keep relay CR5 is closed, and the pulp can be opened and closed by the switch S1. This method is used after the external power is restored.

This is an excellent method in terms of safety because the valve can only be opened or closed by closing the switch S4.

As described above, compared to conventional emergency actuation valves using springs, etc., the present invention can be configured without using a complicated mechanism, and because it is configured with an electric circuit, it is an inexpensive and highly reliable emergency actuation valve. can be provided. In addition, in the case of a mechanical type, the spring can be manually reset after an emergency operation.

However, as seen in the embodiment, the present invention requires only the operation of a switch.

It is possible to return to the previous state and is operationally superior. .

[Brief explanation of drawings]

1 to 6 are circuit diagrams showing embodiments of the present invention. It is. (117r = power transformer. (2) C'R1, CR21 relay coil'
10(s) CR1-1, CR1-21 relay CR
1 normally open contact, (41C'R1-5, CR1-a, (
, 'R1-5: Normally closed contact of relay CR1. (5) CR2-1, C'R2-a + normally closed contact of relay C'R2. 161CR2-2, CR2-5 + Relay C1 (2 normally open contacts. (7) CR3I key relay. 5 (Set coil of 81St key relay CRs. [91A'! Reset coil of key relay CR3, (
11M+[i current motor, (+1) R1, R2I resistance. (121D: Diode, 0 (to) C: Capacitor. 1st mouth:: Kouchi lit kan 斤乍代' 20 3rd eye 5 mouth 111--m'1.] Fl17 medium-vinegar I'm in the middle of the day (-i generation)

Claims (1)

[Claims] 1. The above-mentioned electric pulp in the electric pulp having an electric tri-operator that decelerates the rotational force of the electric motor and outputs it to the output shaft, and stops the electric motor when the output shaft reaches a predetermined position. The time when the operating device receives an external tributary power source and converts it to DC. a motor driven by the DC power supply circuit; Placed between the Jokirin current power supply and the above electric motor, it prevents DC power from being supplied to the electric motor by external signals. A control circuit to change the forward and reverse directions of the motor. An external AC line provided separately from the DC power source. A charger connected to a circuit that receives current power and converts it to direct current. If the external AC power supply is cut off, the battery can be powered. 5. An electric valve comprising a circuit for connecting the battery to a front power distribution motor and supplying power so that the pulp rotates in the closing or opening direction. 2. The electric valve according to claim 1, characterized in that it is provided with a circuit that can simulate external alternating current ms. 6. In claim 1 or 2, a current larger than a specified current flows through the motor. When open, cut off the power to the motor. 9. An electric valve characterized in that it is provided with a circuit.9. . 4. In claim 1, within the control circuit. A circuit that remembers when the external AC power supply is cut off. Even if the external AC power is restored, the power will be shut off. The state is maintained and the signal is input from the outside. A control circuit for rotating the electric motor in the forward and reverse directions. An electric valve characterized in that the electric valve is configured to return to a state before an external AC circuit is cut off.