JPH0316456B2 - - Google Patents

Description

Detailed Description of the Invention - Field of Industrial Application - The present invention relates to an anti-freeze valve used to prevent water pipes from freezing in winter, and particularly relates to a device for remotely controlling the anti-freeze valve from indoors. .

-Prior Art- As is well known, in cold regions, indoor temperatures drop below zero at night, and if the water in the pipes that are distributed indoors freezes, the water supply becomes unavailable for a long period of time. There is a risk. For this reason, in cold regions, it is recommended to prevent freezing by leaving the door open at night when the temperature is likely to drop below zero, or by using an anti-freeze plug built into the base of the distribution pipe. water is removed to the outside.

By the way, conventional antifreeze valves used for such purposes are either manually operated type or remotely operated type using an actuator. Therefore, with these antifreeze valves, there is a possibility that people may forget to drain the water from the distribution pipe without realizing that the temperature has dropped, or that freezing may occur while the water is being stored. For this reason, attempts have been made in the past to equip a remote control device for an antifreeze valve with a water temperature sensor to automatically switch the antifreeze valve to a water draining state when the water temperature reaches the expected freezing temperature. However, in such a remote automatic control device for antifreeze valves, the antifreeze valves are kept in a state where water is flowing for a long period of time during the summer, so the O-ring may become worn out or become rusty. Therefore, the initial operating torque may be abnormally large.
Therefore, in the case of such a remote automatic control device, if you feel safe when the power is turned on, even if the water temperature sensor detects an abnormal temperature and the antifreeze valve is commanded to switch to the drain state, the antifreeze valve will not turn on. was not switched, and there was a risk that the distribution piping would freeze when the person was away.

-Object of the Invention- In view of the problems in the conventional remote automatic control of antifreeze valves as described above, the present invention provides a remote control automatic control device that can check for malfunctions of antifreeze valves in advance. It is in.

-Structure of the Invention- In order to achieve this object, the present invention provides a remote automatic control device for an antifreeze faucet that switches the antifreeze faucet to a water draining state based on the predicted freezing temperature detected by a water temperature sensor.
It is proposed to provide an operation check means for switching the antifreeze valve to the water draining state by turning on the power of the remote control panel.

-Example- An example of the present invention will be described in detail with reference to FIGS. 1A to 1D.

Figure 1A shows the water supply equipment of a general household, and the distribution pipes 3, 3, etc. from the underground wiring 1 to the respective pipes 2, 2,... Stoppers 5, 5, . . . are provided, and by electric operation of the antifreeze stopper 5, water is supplied to the pipe 2 and water in the distribution pipe 3 is drained to the perforated pipe 6 side. Further, the distribution pipe 3 is provided with a water temperature sensor 7 for detecting the water temperature in the pipe, and the water temperature in the pipe is monitored by the water temperature sensor 7. Further, the distribution pipe 3 is provided with an intake valve 8 at its highest position as an intake port for draining water.

In addition, individual operation panels 9, 9, and 1 are used to remotely control the antifreeze valve 5 and to receive the detection signal from the water temperature sensor
Wiring is provided between the two central operation panels 10.

As shown in FIG. 1B, the individual operation panel 9 includes a power switch 11, a water flow operation switch 12, a water drain operation switch 13, an abnormality display lamp 14, an abnormality alarm buzzer 15, and an alarm check switch 16.
In addition, the water flow operation switch 12 and the water drain operation switch 13 each have a lamp 1 that displays their respective operation status.
2A and 13A are attached.

In such an operation panel 9, switches 12,
13 are used to perform a water supply operation and a water drain operation, respectively, and thereby, by forming a current supply circuit to the actuator 4, the antifreeze valves 5 can be individually and remotely operated. Further, the alarm check switch 16 is a switch that checks whether the abnormality alarm circuit of the lamp 14 and the buzzer 15 is appropriate.

As shown in FIG.
...) water flow operation switches 17 ₁ , 17 ₂ , 17 ₃ ,
17 ₄ ..., water drain operation switch 18 ₁ , 18 ₂ , 18
₃ , 18 ₄ , ..., abnormality display lamp 19 ₁ , 19 ₂ , 1
9 ₃ , 19 ₄ , . . . and a common alarm buzzer 20. These switches 17 ₁ to 17 ₄ , 18 ₁ to 18 ₄
The lamps 19 ₁ to 19 ₄ are organized into a parallel circuit with switches 12 and 13 on the individual operation panel and the lamp 14, so that water passing and draining operations can be performed from either the centralized operation panel or the individual operation panel. The operation status is displayed. The buzzer 20 is configured as an operating circuit with a logical sum condition that operates and issues an alarm when any one of the buzzers 15 of each individual operation panel is operated.

The remote control circuit for the antifreeze valve using these operation panels, including the necessary power supply, are all provided within the individual operation panel 9. However, inside the actuator 4, there is an open/close position detector (for example, a limit switch) of the antifreeze valve 5.
will be provided. The remote control circuit is composed of a microcomputer and a relay circuit depending on the scale of the water supply facility. For example, a remote control circuit having a relay circuit configuration switches between operation of water flow operation switches 12, _{17 1} to 17 ₄ and operation of water drain operation switches 13, 18 ₁ to 18 ₄ by a self-holding relay or its relay circuit. Forms an energizing circuit that self-holds the water and switches the corresponding antifreeze valve between the water flow and drain sides.

FIG. 1D shows the main control flow of the remote control circuit. When the power switch 11 is turned on (step S1), the antifreeze valve is operated to the water drain side (step S2), and the antifreeze valve is operated to the water drain side within a predetermined time (for example, 10 seconds) from the start of this operation. It is determined from the output of the position detector (step S3) whether or not the water is drained, and when the water drain side is not operated, the lamps 14, 19 ₁ to
₉₄ , an alarm is generated by the abnormality display buzzers 15 and 20 (step S4). Therefore, by generating this alarm, it is possible to know the abnormality of the antifreeze valve and take early action to prevent freezing accidents. Also, if the water drain side is operated within the predetermined time, wait for the next water flow operation switch 13, _{18 1} to 18 ₄ to be turned on, and then turn on the antifreeze faucet (step S5) to turn the antifreeze faucet to the water flow side. (step S6) and check the time since the start of the operation (step S7) in the same way as the water draining described above, and if the operation is not possible, an abnormality is displayed and an alarm is generated (step S4). Note that after the above-described series of abnormality checks, the remote automatic control device in the illustrated example
When the normal operation by the water temperature sensor 7 is started and the expected freezing temperature is detected by the water temperature sensor, the antifreeze valve is automatically switched to the water draining state.

-Effects of the Invention- As is clear from the above description, according to the present invention, the antifreeze valve is switched to the water draining state by turning on the power of the remote control panel, so when switching the antifreeze valve is impossible. In this case, abnormalities can be detected immediately.
Therefore, during the summer, you can know in advance if the antifreeze valve is malfunctioning if water is left running for a long period of time, so you can go out with peace of mind by simply turning on the power switch on the remote control panel. This makes it possible to obtain a highly reliable remote automatic control device for antifreeze valves.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, with FIG. 1A showing the configuration of water supply equipment, FIG. 1B showing the panel configuration of the individual operation panel 9, and FIG. 1C showing the panel configuration of the centralized operation panel 10. FIG. 1D shows a control flowchart of the main parts of the remote automatic control circuit. 1...Water main, 2...Clean, 3...Distribution pipe, 4...Actuator, 5...Anti-freeze plug, 7...
... Water temperature sensor, 8 ... Intake valve, 9 ... Individual operation panel, 10 ... Central operation panel, 11 ... Power switch, 12, 17 ₁ ... Water flow operation switch, 13,
18 ₁ ... Drain operation switch, 14, 19 ₁ ... Abnormality indicator lamp, 15, 20 ... Alarm buzzer.

Claims (1)

[Claims] 1. In a remote automatic control device for an antifreeze faucet that switches the antifreeze faucet to a water draining state based on the predicted freezing temperature detected by a water temperature sensor, an operation check means is provided to switch the antifreeze faucet to a water draining state when the remote control panel is powered on. A remote automatic control device for an antifreeze valve, characterized in that: