JP2545722Y2 - Anti-freezing device for pump pressure water supply - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The invention belongs to the field of equipment that is pumped and supplied by a pump, and is a motor-operated valve opening / closing valve that opens and closes a valve by an electric drive and a valve opening / closing control that controls the valve. It is an object of the present invention to realize an apparatus for preventing freezing of a pump pressure feed water supply pipe system in cold weather by using a device and a pump motor stop detection unit provided in parallel with the device.

(Prior Art) Conventionally, an antifreezing means is used in a water supply device in a snowy cold region. Generally, it is implemented by a method of draining water in a pipe of a water supply device, and there are a wide variety of methods, such as manually opening antifreeze water and electrically driving antifreeze water. Although antifreeze water stoppers are used to prevent freezing in the pump pressure feed water supply piping system in snowy cold regions, the operation of removing the antifreeze water and the operation of starting and stopping the pump are independent with the conventional technology. Therefore, in cold weather, the drainage operation of the antifreeze water stopper must be performed every time the pumping water supply is completed by the pump. If the drainage operation is forgotten, there is an inherent defect that a freezing accident of the pump pressure feed water supply piping system is induced.

(Problems to be solved by the present invention) In view of the above circumstances, the present invention is designed to prevent the trouble of draining operation of the pump pressure feed water supply piping system in cold weather and the freezing accident of the pump pressure feed water supply piping system due to forgetting the drainage operation in cold weather. It is an object of the present invention to provide a method for preventing freezing of a pumping water supply piping system, which eliminates defects inherent in the prior art, such as induction.

(Means for Solving the Problems) The object of the present invention is to provide a pump pressure feed water supply piping system with the electric valve on / off valve being shut off when the summer / winter changeover switch of the valve on / off control device is turned on to the summer side. Is maintained in a residual water state (hereinafter referred to as a residual water cutoff state). When the pump is stopped and the pump is put on the winter side, the electric valve opening / closing valve is opened to drain the water supply pipe and the branch pipe. This is achieved by employing a configuration in which the pump pressure supply / water supply piping system is shut off again after a certain time has elapsed and the pump pressure feed water supply piping system is maintained in a drained state (hereinafter, referred to as an antifreeze cutoff state).

(Operation) According to the above method, when the summer / winter changeover switch of the valve opening / closing control device is turned on to the winter side when the pump is stopped in cold weather, the pump is then pumped when the pump is stopped regardless of the number of times the pump is used. The water supply piping system is always kept in an antifreeze-blocked state, and freezing is reliably prevented.

(Embodiment) The present invention will be described in accordance with an embodiment. The anti-freezing device for pumping and supplying water according to the present invention controls an electric valve opening / closing valve a and a valve opening / closing drive of the valve a as shown in FIG. It comprises a valve opening / closing control device b and a pump motor stop detecting unit d for detecting the stop of the pump motor c and controlling the valve opening / closing control device b. As shown in FIG. 2, the motor-operated valve opening / closing valve a includes an upper driving unit 1 and a lower valve opening / closing valve 2, and the driving unit 1 includes a driving motor 3, a gear transmission 4, a lifting converter 5, and a lifting converter. The valve 6 comprises a valve body 7 having an integral lower end of the spindle 6, a water inlet 8, a water outlet 9, a water inlet 8, and a water outlet 9 as an output shaft of the machine 5. Communication opening 10
The upstream of the water inlet 8 is connected to a branch pipe e and communicates with a water supply pipe f, and the downstream of the water outlet 9 is connected to a drain pipe g. The valve opening / closing control device b has a power switch 11 on the front left side and a summer / winter changeover switch 12 on the right side. Further, when the summer / winter changeover switch 12 is turned on to the winter side, the pump is electrically connected so that the summer / winter changeover switch 12 is turned on again to the winter side every time the stoppage of the pump motor c is confirmed. The motor stop detection unit d is provided in parallel. When the plug 13 of the valve opening / closing control device b is connected to the power supply, the power switch 11 is turned on, and the summer / winter changeover switch 12 is turned on to the summer side, the electric valve opening / closing valve a, which has been kept closed in the antifreeze cutoff state, remains as it is. The pump is started and stopped by operating the pump motor start / stop switch i for operating the start / stop of the pump h, and the water supply / stop from the water supply adapter j is performed. Hold. When the pump is stopped in cold weather, when the summer / winter changeover switch 12 is turned on in the winter side, the drive motor 3 is driven, the valve body 7 is raised, and the electric valve opening / closing valve a is in the open state, and the branch pipe e and the water supply pipe The residual water of f starts draining through the drainage pipe g, and after a lapse of a predetermined time, the driving motor 3 is driven in reverse by a timer built in the valve opening / closing control device b, and the valve body 7 is driven.
Is lowered to bring the motor-operated valve opening / closing valve a into the closed state, and the pump pressure feed water supply piping system maintains the antifreeze cutoff state. Water supply pump h after the summer / winter selector switch 12 is turned on to the winter side
When the water is supplied and the pump motor start / stop switch i is switched to stop water, the summer / winter changeover switch 12 is electrically connected by the pump motor stop detection unit d so as to be turned on again on the winter side. The opening / closing valve a performs the above-described series of operations, and the pump pressure feeding / water supply piping system is kept in an antifreeze cutoff state. After that, start the pump motor
By switching the stop switch i, the pump h is started and
Each time the stop is repeated, the above operation is repeated,
When the pump is stopped, the pump pressure feed water supply piping system maintains the antifreeze cutoff state, so that the pump pressure feed water supply piping system is prevented from freezing.

The time set by the above-mentioned timer is determined by the branch pipe e
Is set to a time somewhat longer than the time when the residual water in the water supply pipe f is completely drained through the drain pipe g.

Further, the valve opening / closing control device b is configured as an electric circuit that does not drive the electric valve opening / closing valve a even when the summer / winter changeover switch 12 is turned on to the winter side when the pump is started, and sends the pump pressure to the drain pipe g. It does not happen.

Further, as shown in FIG. 3, a check valve k is provided between the second branch pipe l and the elevated water tank m at the downstream side of the pump h of the pump pressure feed water supply pipe system according to the present invention. By connecting the second check valve n and the second motor-operated valve opening / closing valve o, an auxiliary water supply piping system for supplying water from the elevated water tank is added,
Further, the second electric valve on / off valve o is opened and held when the summer / winter changeover switch 12 is turned on to the summer side, and the second electric valve on / off valve o is turned on when the switch is turned on on the winter side.
If the summer / winter changeover switch 12 is turned on in the summer side, water supply by a pump or an elevated water tank will be applied, and if it is turned on in the winter side, antifreeze will be shut off. It is also possible to realize an anti-freezing device for pump pressure feed water supply piping with auxiliary water supply in summer, which enables water supply by a pump that maintains the state.

(Effect of the invention) As described above, in the pump pressure feed water supply piping system equipped with the device according to the invention, when the summer / winter changeover switch is turned on once in the winter side when the pump is stopped, the pump motor start / stop switch is thereafter turned on. Since the operation of shut-off is linked to a series of operations that keep the pump pressure feed water supply piping system in an anti-freeze shut-off state, complicated drainage operations at the end of pump pressure feed water supply in cold weather, and pump pressure feed due to no drainage operation It is possible to eliminate the freezing accident of the water supply piping system, and there is an effect that the subsequent use of water in cold weather can be performed safely without inducing the freezing problem of the pumping water supply piping system.

[Brief description of the drawings]

FIG. 1 is a system diagram of the freeze protection device for pump pressure water supply according to the present invention, FIG. 2 is an explanatory diagram of a main part of the freeze prevention device for pump pressure water supply, and FIG. BRIEF DESCRIPTION OF THE DRAWINGS It is a system diagram of the anti-freezing apparatus for pump pressure feeding water supply with water supply. In the figure, 1 is a driving unit, 2 is a valve opening / closing valve, 3 is a driving motor, 4 is a gear transmission, 5 is a lifting / lowering converter, 6 is a spindle, 7 is a valve body, 8 is a water inlet, and 9 is a water outlet. , 10 is a communication port,
11 is a power switch, 12 is a summer / winter switch, and 13 is a plug. a is an electric valve opening / closing valve, b is a valve opening / closing control device, c is a pump motor, d is a pump motor stop detector, e is a branch pipe, f is a water supply pipe, g is a drain pipe, h is a pump,
i is a pump motor start / stop switch, j is a water supply adapter, k is a check valve, l is a second branch pipe, m is an elevated water supply pipe, n is a second check valve, and o is a second electric valve opening / closing valve. ,

Claims (1)

(57) [Scope of request for utility model registration] In a water supply piping system fed by a pump, a first state and a branch provided between a branch piping and a drainage piping branching from a water supply piping of the water supply piping system to shut off the branch piping and the drainage piping. A motor-operated valve opening and closing valve that switches the pipes and drainage pipes to the second state, a summer side that keeps the branch pipes and drainage pipes in the first state, and branch pipes and drainage when the pump is stopped The pipe is shifted to the second state, and after a certain period of time set by the timer has elapsed, the switch is returned to the first state again and provided with a summer / winter changeover switch for selecting the winter side to be held, and the electric valve opening and closing valve is provided. When the valve opening / closing control device with a built-in drive source and the summer / winter changeover switch are turned on in the winter side, the summer / winter changeover switch is turned on again in the winter side every time the stoppage of the pump motor is confirmed. And a pump motor stop detection unit that is electrically connected.When the summer / winter changeover switch is turned on to the winter side while the pump is stopped, the summer / winter changeover switch is turned on to the winter side. When the pump motor is stopped in this state, the motor-operated valve opening / closing valve is opened, and after the elapse of a certain time set by the timer, the valve is again shut off and held to operate, and the freeze prevention device for pump pressure water supply is provided.