JP4878962B2 - Emergency shut-off valve device - Google Patents

Description

  The present invention relates to an emergency shut-off valve device, and more specifically, for example, includes an emergency shut-off valve that shuts off water and hot water supply and other fluid flowing pipes at the time of an earthquake exceeding a seismic intensity of 5 or more and detects an earthquake. The present invention relates to an emergency shut-off valve device that performs valve opening and closing operations at a constant cycle when not in operation.

For example, in the case of water supply piping, conventional emergency emergency shutoff valves are of large diameter that are attached to the main pipe, and mechanical and electrical emergency shutoff valves that shut off the entire water supply system are well known. Regular operation checks are not made.
Japanese Patent Laid-Open No. 2001-289343 (pages 2 to 3 and FIG. 1)

  However, pipe damage during a large-scale earthquake is different for each house in apartment buildings, and restoration of water supply etc. can be carried out for each house, and the restoration operation should be performed considering the total number of houses. Residents need to be able to do it easily.

  In addition, since it is a working valve in the event of a large-scale earthquake that occurs in units of several years at the shortest, periodic inspections are necessary, and automation is necessary when considering the quantity.

  Therefore, the invention of the present application prevents a secondary water leakage accident that occurs in each unit, facilitates restoration of water flow in each unit, and performs an emergency shut-off valve that performs periodic automatic inspections that guarantee rare frequency operation, The system has a problem that must be solved.

  In order to solve the above problems, the emergency shutoff valve of the present invention has the following configuration.

(1) The emergency shut-off valve device is arranged between pipes drawn into each door, includes an valve and an actuator for opening and closing the valve, and has an emergency shut-off function for closing the valve when an earthquake is detected A seismic device connected to the valve and the actuator by a cable and having an earthquake detection sensor for detecting an earthquake is separately formed and attached to the wall of each door , and a control circuit is provided in the actuator of the emergency shutoff valve. A substrate, a valve opening / closing direct current motor, and a storage battery that stores a voltage for driving the direct current motor, and is stored in the storage battery when an earthquake is detected by the earthquake detection sensor of the seismic device. The charging voltage is supplied to the DC motor and the valve is driven to close.
(2) The actuator has a function of automatically performing an operation test for opening and closing the valve by driving the DC motor at a constant period when no earthquake is detected (1). ) Emergency shut-off valve device as described in.
(3) The emergency shut-off valve device according to (2), wherein the cycle for driving the DC motor to open and close the valve is approximately one month.

  According to this proposal, for example, it is possible to prevent secondary water leakage accidents caused by restarting pumps after an earthquake due to damage to piping and other equipment when a large-scale earthquake exceeding seismic intensity 5 or more occurs, and regularly By performing automatic operation check, it is possible to compensate for reliable valve operation even in the event of a large-scale earthquake, which is a rare phenomenon.

  Next, an embodiment of an emergency shutoff valve device according to the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the emergency shut-off valve device of the present invention includes an opening / closing mechanism that is arranged between pipes 11 drawn into each door and is connected to the pipe 11 drawn into each door to open and close the valve. A valve body 12, a gear portion 15 that is driven through a stem 14 for opening and closing the valve 13 of the valve body 12, a DC motor (motor) 16 and a DC motor 16 for driving the gear of the gear portion 15. An emergency shut-off valve comprising: a control circuit board 17 for driving and controlling the battery; storage batteries 18A and 18B for storing a voltage for driving the DC motor 16; an actuator 21 having a transformer 19 for converting the voltage; 21 is connected with a cable 22 and an earthquake detection sensor 23 for detecting an earthquake, and an operation panel 25 having an operation knob 20 for switching between test and use. Valve 13 is composed of an earthquake feeling SHINKI 26. that includes a display device 24 for displaying the status of that and actuating the test is working.

As shown in FIGS. 3 and 4, the valve main body 12 is disposed between the pipe 11 and a spherical valve 13 is disposed inside the valve box 27 so as to be freely opened and closed.
The valve 13 is formed in a ball shape, and has a configuration including a through hole 28 that has a notched surface and a through-hole that has been formed through the notched surface. When the state (see FIG. 3) and the through-hole 28 rotate, the channel is closed and the closed state (see FIG. 4) is obtained.

As described with reference to FIG. 1, the DC motor 16, the storage batteries 18 </ b> A and 18 </ b> B formed of two capacitors, and the control circuit board 17 are arranged in the actuator 21, and the DC motor 16 is a gear. It is connected to the reduction gear mechanism of the part 15.
As shown in FIG. 2, the control circuit board 17 includes storage batteries 18A and 18B, and includes a clock 45, a timer 46, and an MPU 47 as elements.
As shown in FIG. 2, when the DC motor 16 is driven to rotate the valve 13 (see FIG. 1), the open state is closed, or the closed state is opened. The two limit switches 31A and 31B are provided so as to be opposed to each other and detected by the movement of the switch cam 29 that rotates in conjunction with the stem 14. The DC motor 16 is configured to be driven by the voltage charged in the storage batteries 18A and 18B, so that even when an earthquake occurs and the supply of power is interrupted, the storage batteries 18A and 18B are charged. The valve 13 is rotated using the charging pressure to perform a closing operation or a closing operation.
When the charging pressure of the storage batteries 18A and 18B is exhausted, the valve 13 can be manually opened and closed by operating a manual opening / closing knob 30 (see FIG. 1) provided in the gear portion 15. .

  The two limit switches 31A and 31B are configured such that one of the switches when the switch cam 29 rotates approximately 90 degrees is turned on. For example, now when the limit switch 31A is pushed by the switch cam 29 and is in the on state, when the DC motor 16 is driven and rotated, the valve 13 operates in the closing direction, and the switch cam 29 also moves in conjunction therewith. When the limit switch 31A is turned off and the switch cam 29 turns on the limit switch 31B with approximately 90 degrees of rotation, the closing operation of the valve 13 (see FIG. 4) is completed. Similarly, when the DC motor rotates when the limit switch 31B is in the ON state, the valve 13 operates in the closing direction, and the switch cam 29 turns on the limit switch 31A so that the opening operation (see FIG. 3) is performed. Complete.

  The storage batteries 18A and 18B are used as a so-called backup power source, and are devised so as not to perform regular replacement work as much as possible by using an electric double layer capacitor having a long life.

  As described with reference to FIG. 1, the seismic seismic device 26 is formed in a box shape, and includes a level 32 for maintaining the box horizontally in order to detect an earthquake at the top, and an operation panel 25. Is equipped with an operation knob 20 for performing a test and the like, and a display device 24 having an operation display window that displays red and normally displays green when an earthquake is detected beside it. Yes. This seismic device 26 can be placed in a place where the operation or display state of each door wall or the like can be visually recognized, and a display device 24 for displaying the results of periodic valve opening / closing operation tests. It is used to check the state of the above, or when the operation knob 20 is operated to change the valve from the closed state to the open state after an actual earthquake occurs.

  FIG. 5 is a block diagram showing a control-related circuit in the actuator 21 as a block. A power converter 35 that converts commercial AC power (100V / 200V) into 5V, an A / D converter 36 that converts 5V from the power converter 35 into DC power, and capacitor charge control that inputs and charges DC power A backup power supply unit 37 composed of a circuit, a motor control circuit 38 for controlling the DC motor 16 by supplying a charging voltage charged by the backup power supply unit 37, and a motor drive output unit 39 for driving the DC motor 16. And an open / close signal 41 generated when the limit switches 31A and 31B (see FIG. 1 and FIG. 2) are turned on / off generated by the rotation of the DC motor (motor) 16, and a counter is set based on the open / close signal 41. The clock mechanism unit 42 that counts up or measures the timer when the valve 13 automatically opens and closes, and the clock mechanism unit 42 measures the timer. Opening / closing operation confirmation signal 45 that outputs whether or not the automatic valve opening / closing operation is within a predetermined time, a signal from the earthquake detection sensor 23 (see FIG. 1) that is turned on when an earthquake occurs, and the temperature / humidity The control unit 44 is composed of an MPU or the like that receives an open / close instruction signal 43 consisting of a signal and selects whether or not to urgently operate the valve, and a clock IC 48 that outputs a clock.

The timepiece mechanism unit 42 is configured to include a timer / counter, and is configured to reset the counter by receiving an open / close signal 41 generated by the rotation of the DC motor 16. The timepiece mechanism unit 42 is set to output a signal at a fixed time every day, for example, at midnight, such as 1 am, which is statistically least frequently used. Open / close operation signal is output once (approximately 1 month).
When the opening / closing operation signal is output, it is first transmitted to the control unit 44, transmitted from the control unit 44 to the motor control circuit 38, and a predetermined DC voltage is supplied to the DC motor 16 by the motor drive output unit 39. When 16 rotates, the rotational drive is transmitted to the gear portion 15 and when the stem 14 rotates, the valve 13 rotates from the open state to the closed state, and the interlocking switch cam 29 is connected to the limit switch 31B. The valve is closed by pressing. Subsequently, when the DC motor 16 further rotates in the opposite direction, the valve 13 shifts from the closed state to the open state, and the switch cam 29 pushes the limit switch 31A to return to the original open state. .

  In this way, the opening / closing operation of the valve 13 is performed. The control unit 44 determines whether the set time of the timer and the opening / closing operation time of the valve 13 are normal, and outputs an opening / closing operation confirmation signal 45 to the outside. . This opening / closing operation confirmation signal 45 is transmitted to the seismic device 26, and if the opening / closing operation of the valve 13 is completed within the set time of the timer, it is determined that the valve 13 is normal and an operation display 49 indicating that the valve is normal is displayed on the display device 24. To do. If it is not completed, an abnormality signal is output to the display device 24 as an abnormality, and an operation display 49 that allows visual recognition of the abnormality is displayed.

  For example, it is possible to prevent secondary water leakage accidents caused by pump restarts after an earthquake due to damage to piping and other equipment when a large-scale earthquake with a seismic intensity of over 5 occurs, and to automatically check the operation periodically. Thus, an emergency shut-off valve device that can compensate for reliable valve operation even in the event of a large-scale earthquake, which is a rare phenomenon, is provided.

It is the block diagram which showed schematically the emergency shut-off valve apparatus of this invention. FIG. 6 is a partial cross-sectional view showing the arrangement relationship of switches inside the actuator. It is explanatory drawing which shows an emergency cutoff valve apparatus when a valve is an open state similarly. It is explanatory drawing which shows an emergency cutoff valve apparatus when a valve is a closed state. 2 is a block diagram of a control system circuit for controlling the emergency shutoff valve. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Piping 12 Valve body 13 Valve 14 Stem 15 Gear part 16 DC motor 17 Control circuit board 18A Storage battery 18B Storage battery 19 Transformer 20 Operation knob 21 Actuator 22 Cable 23 Earthquake detection sensor 24 Display device 25 Operation panel 26 Earthquake seismic device 27 Valve box 28 Through-hole 29 Switch cam 30 Manual open / close knob 31A Limit switch 31B Limit switch 32 Level 35 Power conversion unit 36 A / D conversion unit 37 Backup power supply unit 38 Motor control circuit 39 Motor drive output unit 41 Open / close signal 42 Clock mechanism unit 43 Open / close instruction signal 44 Operation selection unit 46 Timer 47 MPU
48 Clock 49 Operation display.

Claims (3)

It is placed between the pipes drawn into each door,
An emergency shutoff valve comprising a valve and an actuator for opening and closing the valve, and having a function of closing the valve when an earthquake is detected;
The actuator is connected to the actuator with a cable, and a seismic sensor equipped with an earthquake detection sensor for detecting an earthquake is formed separately and attached to the wall of each door,
The actuator in the emergency shut-off valve includes at least a control circuit board, a DC motor for opening and closing the valve, and a storage battery for storing a voltage for driving the DC motor, and an earthquake is detected by the earthquake detection sensor of the earthquake seismograph. An emergency shut-off valve device comprising a function of supplying a charging voltage stored in the storage battery to the DC motor when the sensor is sensed to drive the valve in a closing operation.   2. The actuator according to claim 1, wherein the actuator has a function of automatically performing an operation test for opening and closing the valve by driving the DC motor at a constant period when no earthquake is detected. Emergency shut-off valve device.   The emergency shut-off valve device according to claim 2, wherein the cycle of driving the DC motor to open and close the valve is approximately one month.

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