JPH063280Y2 - Liquid supply shutoff device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a supply liquid cutoff device for a mechanical device, such as an automatic vending machine or an automatic washing machine, which is directly connected to water and supplies water each time the device is operated.

[Conventional technology]

A mechanical device that frequently repeats water supply and stoppage operations during operation,
For example, vending machines such as juice and instant coffee are directly connected to the water supply of the building through piping.

[Problems to be solved by the device]

Even when the vending machine is in operation during the daytime, for example, even if the piping is damaged and a water leakage accident occurs, when a lot of people come and go in the vicinity of the vending machine, it is possible to notice the occurrence of the accident in the washer. However, if a damage accident occurs in a time when it is hard to see, such as at night, it will be left until the next day, and the leakage of water will continue, especially if it is installed in a building, the corridor will be flooded, Water leaks downstairs.

The present invention provides valves on the machine side and the main tap side of the water supply,
When water is stopped, both valves are closed and the pressure water of the tap water is sealed between both valves, and the pressure of this pressure water is monitored by a pressure switch.When water leaks between both valves, the pressure water pressure drops. It was detected by a pressure switch, and the long-term water leakage accident was eliminated by closing the valve on the tap side of the water supply thereafter.

[Means for Solving the Problems]

Automatically connected to the water supply through the pipe and operating the on / off operation of the operation switch equipped in the main unit to operate the inlet valve built into the main unit to repeat the water supply / stop operation frequently during operation. In a mechanical device such as a sale, a gate valve that opens and closes at the same time as the inlet valve by turning on and off the operation switch is provided at the base of the pipe, and a pressure switch that turns on and off in the middle of the pipe due to a decrease in water pressure. And the gate valve is kept closed by the operation of the pressure switch.

[Action]

During normal operation, the inlet and gate valves are opened and closed at the same time by turning on and off the operation switch of the main body to perform water supply / water stoppage operation.When water is stopped, both valves are closed to release pressure water between both valves. Keep in water and monitor this pressure water with a pressure switch installed in the middle of the pipe.When water leaks in the pipe and the pressure of the pressure water drops, the pressure switch detects the occurrence of water leak and outputs a signal. After that, the gate valve is kept closed regardless of whether the operation switch is turned on or off.

〔Example〕

Next, the configuration will be described with reference to an embodiment diagram. Water is supplied from the pipe (3) to the vending machine (1) by opening and closing the inlet valve (2). At this time, since the gate valve (4) is opened / closed according to the opening / closing of the inlet valve (2), pressure water is constantly filled in the pipe (3) through which water flows, and the diaphragm () of the water pressure sensing switch (5) ( 5a) holds the manual return contact (5b) in the normally open direction. If the use of water is stopped and the inlet valve (2) is closed, the gate valve (4) will also follow and close as described above, but the pressure water remains sealed in the pipe (3). , The diaphragm (5a) of the water pressure detection switch (5) maintains its inflated posture without being turned inward, and therefore the manual return contact (5b) does not change, so opening and closing the inlet valve (2) causes the gate valve ( 4) also opens and closes, but if there is water leaking anywhere in the pipe (3), the water pressure in the pipe (3) will disappear, so the diaphragm (5a) will reverse and the manual return contact (5b) will switch. ,
The gate valve (4) is locked in the closing direction and its state is displayed by a lamp or the like.

In order for the locked gate valve (4) to open and close according to the opening and closing of the inlet valve (2), the gate valve (4) must operate unless the cause of water leakage is eliminated and the manual return contact (5b) is switched. Therefore, there is no fear of continuing water leakage. In addition, (6) is the main plug,
(7) is water supply.

[Effect of device]

Many of the water supply pipes for automatic washing machines, vending machines, etc. were expanded and extended after the building was built, and there is a possibility of water leaks. Since there are many places, it is sufficient to shut off the water supply based on this location, but since it is far from the place where the work is performed, water supply by simply opening and closing the valve at the pipe end is generally used.

Therefore, it is easy to leak water, and a gate valve is installed at the location of the pipe where damage is caused by water leakage, and the gate valve is opened / closed with the opening / closing of the inlet valve at the pipe end. At times, there is an advantage that the high water pressure is not applied to the above-mentioned piping part, and the presence of a water pressure sensing switch when the piping leaks, the closing lock of the gate valve at the base and the leakage display before the leakage progresses. This is advantageous for quick recovery of the failure. When a motor valve is used as the base gate valve, the closing time is slower than that of the solenoid valve, and the supply water pressure always remains in the piping when closing, so there is no risk of malfunction.

[Brief description of drawings]

 FIG. 1 is a layout diagram of this apparatus. (1) …… Vending machine, (2) …… Inlet valve, (3) …… Piping, (4) …… Gate valve, (5) …… Water pressure sensing switch.

Claims (1)

[Scope of utility model registration request] 1. A pressurized liquid supply pipe, wherein a valve is provided at each of a tip portion and a base portion of the pipe, the base valve is opened / closed in accordance with opening / closing of the valve at the tip portion, and a pipe connecting both valves is provided. A supply liquid cutoff device, characterized in that a switch that operates upon sensing a decrease in internal pressure of the device locks the valve of the base portion in the closing direction.