JP2001082398A - Automatic pumping machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic pumping machine to prevent a stop of movement of a rise fall valve of the automatic pumping machine during a feed of water or prevent a stop of movement of the rise fall valve during a feed of water after restarting through regulation even when it is stopped. SOLUTION: A valve chamber is situated at the lower end of a raw water main to introduce water from an elevated water storage pond. A rise fall valve closed by a water pressure of water flowing out from a drainage window and opened by an own weight and a negative pressure, and a cushioning tank is situated at the upper part of a valve chamber. A force valve is situated between a valve chamber and a buffer tank, an up water feed pipe is situated at the buffer tank, and an introduction valve is situated between the conducting pipe and a valve chamber. In a so formed automatic pumping machine, an external force adding device 8 to apply an external force in the direction in which movement to open the rise fall valve 3 is aided is situated inside a drainage window 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic water pump that pushes up water by the water pressure of a water hammer.

[0002]

2. Description of the Related Art As shown in FIG. 3, a conventional automatic water pump has a valve chamber d at a lower end of a water pipe b for introducing water from a reservoir at a high place.
The drainage window 1 of the valve chamber d is provided with a raising / lowering valve 3 which is closed by the pressure of the water flowing out of the drainage window 1 and is opened by its own weight and negative pressure, and a buffer tank e is provided above the valve chamber d. , A push-up valve 2 is provided between the valve chamber d and the buffer tank e, an upward water supply pipe 4 is provided in the buffer tank e, and a water guide valve 5 is provided between the water guide pipe b and the valve chamber d. The opening and closing of the raising / lowering valve can be restarted or stopped.

[0003]

The above-mentioned conventional automatic water pump has the following problems. <A> The raising / lowering valve 3 is opened by its own weight and negative pressure. However, the instantaneous change of water temperature, outside temperature and water pressure causes disturbance of the negative pressure generation phenomenon, and the movement of the raising / lowering valve often stops. I do. <B> If the operation of the raising / lowering valve stops, stable water supply cannot be performed.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and does not stop the operation of the raising / lowering valve during water supply, or the external force applied even when it stops. It is an object of the present invention to provide an automatic water pump that does not stop the operation of the raising / lowering valve during water supply after restart by adjusting the strength.

[0005]

In order to achieve the above object, an automatic water pump according to the present invention is provided with a valve at the lower end of a water pipe b for introducing water from a reservoir at a high place as shown in FIG. Room d
The drainage window 1 of the valve chamber d is provided with a raising / lowering valve 3 which is closed by the pressure of the water flowing out of the drainage window 1 and is opened by its own weight and negative pressure, and a buffer tank e is provided above the valve chamber d. , A push-up valve 2 is provided between the valve chamber d and the buffer tank e, an upward water supply pipe 4 is provided in the buffer tank e, and a water guide valve 5 is provided between the water guide pipe b and the valve chamber d. An external force applying device 8 for applying an external force to the falling valve is attached to the fixing plate 87, and an adjusting screw 82 for adjusting the strength of the external force applied to the raising / lowering valve to the external force applying device is provided.
Is provided.

[0006]

Embodiments of the present invention will be described below with reference to the accompanying drawings. <A> Overall Configuration The overall configuration is the same as the conventional configuration as shown in FIG. In other words, the headrace b that introduces water from a reservoir at a high place
A valve chamber d is provided at a lower end of the valve chamber d. A drain window 1 of the valve chamber d is provided with an inverting valve 3 which is closed by the pressure of water flowing out of the drain window 1 and opened by its own weight and negative pressure. Is provided with a buffer tank e, a push-up valve 2 is provided between the valve chamber d and the buffer tank e, an upward water supply pipe 4 is provided in the buffer tank e, and a water supply pipe is provided between the water pipe b and the valve chamber d. Valve 5 is provided. Drainage window frame 11
The fixing plate 87 is attached to the, and the external force applying device 8 is fixed.

<B> External force applying device A fixing plate 87 is attached to the drainage window frame 11, and the external force applying device 8 is fixed. Here, since the fixing plate 87 is attached to the drainage window frame 11 with screws, it can be removed. External force applying device 8
As shown in FIGS. 1 and 2, for example, an outer tube 86 for transmitting an external force to a raising / lowering valve inside a guide tube 83, an elastic body 81 for generating an external force as a reaction force, and a position for determining an upper end of the elastic body. The inner pipe 85 includes an adjusting screw 82 for adjusting the position of the inner pipe. As the elastic body 81, a known technique such as a coil spring or rubber can be used.

<C> Adjustment Screw The adjustment screw is supported by a nut fixed to the guide tube 83. The protruding length of the outer pipe 86 from the drainage window frame 11 when the raising / lowering valve 3 is not in contact with the outer pipe 86 is determined by the position of the inner pipe 85 fixed to the adjusting screw.

<4> Operation The raising / lowering valve 3 closes to a position where it comes into contact with the drainage window frame 11 by the pressure of the water flowing out of the drainage window 1. At this time, the outer pipe 86 of the external force applying device 8 fixed to the drainage window frame 11 is pushed back downstream by a length protruding upstream from the drainage window frame 11 by the raising / lowering valve 3, and the elastic body 81 becomes the outer pipe 86. Is shrunk by the length moved. Since the reaction force of the elastic body generated at this time is applied to the raising and lowering valve as an external force through the outer tube, it is possible to change the magnitude of the external force applied to the raising and lowering valve 3 by changing the above-mentioned projection length. it can.

[0010]

As described above, the automatic water pump of the present invention has the following effects. <B> Even if the generation of negative pressure is disturbed due to instantaneous changes in water temperature, outside air temperature, and water pressure, the external valve is applied in the direction in which the valve opens each time the valve is closed. Stable water supply is possible without stopping the operation of the automatic pump in the closed state. <B> Even if the automatic pump is stopped due to large changes in water temperature, outside air temperature, and water pressure, the external force applied to the raising and lowering valve can be easily adjusted with the adjustment screw, and the valve can be restarted after restarting. The water can be supplied stably without stopping the operation of the automatic water pump in a state in which is closed.

[Brief description of the drawings]

FIG. 1 is a sectional view of an external force applying device according to the present invention.

FIG. 2 is a front view of the external force applying device of the present invention.

FIG. 3 is a sectional view of an automatic water pump.

Claims (2)

[Claims] 1. A valve chamber is provided at a lower end of a water pipe for introducing water from a reservoir at a high place, and a drain window of the valve chamber is closed by the water pressure of water flowing out from the drain window and opened by its own weight and negative pressure. An inversion valve is provided, a buffer tank is provided at the top of the valve chamber, a push-up valve is provided between the valve chamber and the buffer tank, an upward water supply pipe is provided in the buffer tank, and between the water pipe and the valve chamber. Is an automatic water pump provided with a water guide valve, wherein an external force applying device for applying an external force in a direction to help the opening and closing valve move is provided inside the drainage window. 2. The automatic water pump according to claim 1, wherein an adjusting screw is attached to the external force applying device, and the adjusting screw can change an external force applied to the raising / lowering valve.