JP2001311183A - Water supply pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water supply pump in which a pressure reducing valve can be installed in a unit on the ground in advance when the pressure reducing valve is required from the beggining of the installation of the device and the pressure reducuing valve can be easily installed in the unit on the ground even after installation of the device when the water level in a well varies after installation of the device or after start of operation and the necessity to install the pressure reducing valve has been clarified. SOLUTION: In the water supply pump provided with a submerged pump 2 installed in a well, a pumped water pipe 4 connected to the submerged pump 2, and a control unit 11 driving to start the submerged pump 2 through a pressure detector 6 connected to the pumped water pipe 4 and stopping the pump 2 through the pressure detector 6 and a flow detector 7, a pressure reducing valve mounting part 12a to mount the pressure reducing valve 11 for reducing the supply water pressure is provided in the water pipe 12 within the control unit 3 on the ground.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water supply pump device, and more particularly to a water supply pump device having a submersible pump used for pumping well water.

[0002]

2. Description of the Related Art Conventionally, there has been known a water supply pump device in which a submersible pump installed in a well is automatically operated by an above-ground unit installed above the ground. In this water supply pump device, if the water supply pressure on the ground changes depending on the height to the underground water surface, the natural water level in the well changes due to the season, time, weather, etc., or it differs from the original plan , The feed pressure changes accordingly. If the water level in the well becomes extremely high, the water supply pressure above the ground may become abnormally high, exceeding the maximum working pressure of the equipment used in the above ground unit. As a result, the equipment in the above-ground unit may be damaged, or the water may blow out vigorously when the water is used, causing an unexpected situation. Therefore, in order to prevent these phenomena, a method of providing a pressure reducing valve between the submersible pump and the above-ground unit to reduce the water supply pressure and limiting the pressure applied to the above-ground unit has been conventionally adopted.

[0003]

However, if it is known from the beginning of the installation of the equipment that the water level fluctuates in the well, a pressure reducing valve is installed from the beginning, but the water level of the well fluctuates after the installation of the equipment or after the start of use. In addition, when it becomes clear that a pressure reducing valve needs to be installed, there is an annoyance that the pumping pipe must be cut and a pressure reducing valve must be inserted in the meantime. Furthermore, even if a pressure reducing valve is installed, since the pressure reducing valve is located outside the above-ground unit, measures must be taken to prevent freezing in winter.

The present invention has been made in view of such circumstances, and when a pressure reducing valve is necessary from the beginning of equipment installation, the pressure reducing valve is installed in the above-ground unit from the beginning, and after the equipment is installed or used. If the water level in the wells fluctuates after the start and it becomes necessary to install a pressure reducing valve, provide a water supply pump device that can be easily installed in the above-ground unit even after installing the equipment. With the goal.

[0005]

In order to achieve the above-mentioned object, the present invention provides a submersible pump installed in a well, a pump connected to the submersible pump, and a pressure pump connected to the pump. In the water supply pump device comprising a ground unit that controls the submersible pump to be stopped by the pressure detecting device and the flow rate detecting device while activating the submersible pump by the detecting device, A pressure reducing valve mounting portion for mounting a pressure reducing valve for reducing the pressure of feedwater pumped from the submersible pump is provided.

Since the present invention is configured as described above, a submersible pump is installed in a well, an above-ground unit is installed on the ground to complete the pipe connection work, and then operation is performed. If the water supply pressure at the unit is higher than necessary and there is a problem in using water, the water supply pressure at the ground unit can be easily increased by installing the integrated pressure reducing valve on the pressure reducing valve mounting part in the ground unit. Can be changed to a good state. On the other hand, if the pressure reducing valve is required from the beginning of the installation of the equipment, it can be attached to the pressure reducing valve mounting portion in the above-ground unit from the beginning.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a water supply pump device according to the present invention will be described below with reference to FIGS. FIG. 1 is a schematic diagram showing a basic configuration of a water supply pump device of the present invention. As shown in FIG.
A submersible pump 2 installed in the submersible pump 2, a ground unit 3 for controlling the submersible pump 2, a water pump 4 connecting the submersible pump 2 and the ground unit 3, a faucet ( And a discharge pipe 5 having a water tap 10.

A pressure detecting device (pressure switch) 6 for detecting a pressure for starting the submersible pump 2 and a flow rate which is one of the conditions for stopping the submersible pump 2 are provided in the above-ground unit 3. Detecting device (flow switch) 7 for maintaining the pressure of the water supply in the discharge pipe 5 while the submersible pump 2 is stopped and for partially supplying water when the faucet 10 is used (when opened). Pressure tank 8 and check valve 9 for preventing backflow from discharge pipe 5 to pumping pipe 4
And is installed.

A check valve 9 is provided in the above-ground unit 3.
A pressure reducing valve 11 is installed on the downstream side of the air conditioner. This pressure reducing valve 1
1 is installed in a flow path pipe 12 in the above-ground unit 3 and is detachably attached to a pressure reducing valve mounting section (described later) of the flow path pipe between the check valve 9 and the pressure detector 6. ing. If it is known from the beginning of the installation of the equipment that the water level fluctuates in the well 1, the pressure reducing valve 11 is attached to the pressure reducing valve mounting portion of the flow pipe 12 from the beginning. When there is no large fluctuation in the water level in the well 1, the pressure reducing valve mounting portion of the flow pipe 12
It is closed by a lid or the like without installing a pressure reducing valve, and water in the flow path piping is prevented from flowing out. Further, if it is found that the water level of the well 1 fluctuates after the installation of the equipment or after the start of use, and it is necessary to install the pressure reducing valve 11, the pressure reduction after removing the lid of the pressure reducing valve mounting portion of the flow pipe 12 is performed. Install the valve 11.

FIGS. 2 and 3 show the detailed structure of the ground unit. FIG. 2 is a longitudinal sectional view of the ground unit, and FIG. 3 is a view taken along the line II-II of FIG. As shown in FIG. 2 and FIG.
Flanges 13 and 14 are fixed to both ends of the.
The pump 13 is connected to the pump 13 and the discharge pipe 5 is connected to the flange 14 (see FIG. 1). In the flow path pipe 12 in the above-ground unit 3, sequentially from the upstream side,
A check valve 9, a flow detecting device 7, a pressure reducing valve 11, a pressure detecting device 6, and a pressure tank 8 are provided. A strainer 20 is provided immediately upstream of the flow detection device 7 and the check valve 9. The above-ground unit 3 includes a unit cover 15 for accommodating each device.

As shown in FIG. 2, the pressure reducing valve 11 is detachably mounted on a pressure reducing valve mounting portion 12a of the flow pipe 12. The upper end surface of the pressure reducing valve mounting portion 12a is a planar mounting seat. The mounting flange 11a of the pressure reducing valve 11 is placed on the mounting seat, and the mounting flange 11a is connected to four bolts 1.
7, the pressure reducing valve 11 can be easily mounted on the pressure reducing valve mounting portion 12a.

FIG. 4 is a sectional view showing the detailed structure of the pressure reducing valve 11. As shown in FIG. 4, the pressure reducing valve 11 has a structure without a valve box, and has a structure in which functions necessary for pressure reduction are integrated.
It can be easily attached to and detached from the pressure reducing valve mounting portion 12a of the flow pipe 12. That is, the valve box is constituted by the flow path piping 12. As shown in FIG. 4, the pressure reducing valve 11 includes a main body 21 having a mounting flange 11 a mounted on the pressure reducing valve mounting portion 12 a of the flow pipe 12, and a valve shaft housed in the main body 21 so as to be vertically movable. 22, a valve body 23 fixed to the lower end of the valve shaft 22, a mounting flange 11a and a cover 24.
And a diaphragm 25 sandwiched therebetween. The pressure reducing valve 11 further includes a pressing member 26 disposed above the diaphragm 25, an adjusting spring 27 for pressing the pressing member 26 and the diaphragm 25 downward, and an adjusting member for adjusting the compression force of the adjusting spring 27. And a screw 28.

In the above configuration, when the packing 29 made of an elastic material such as rubber in the valve body 23 is engaged with the valve seat 21a at the lower end of the main body 21, the valve body 23 is closed. is there. The adjusting spring 28 is adjusted by adjusting the adjusting screw 28.
The adjustment spring 27 is compressed by pushing down the spring seat 30 holding the actuator 7, and the diaphragm 25 is pushed down via the pressing member 26. Thereby, the valve shaft 22 and the valve body 23 directly connected thereto are pushed down, and the valve body 23 is opened. That is, a gap is formed between the packing 29 of the valve body 23 and the valve seat 21a. The fluid entering from the water supply side is filled with the packing 29 of the valve body 23 and the valve seat 21 a of the main body 21.
And flows directly to the diaphragm 25 as secondary pressure at the same time. The secondary pressure applied to the diaphragm 25 can be kept constant by adjusting the opening of the valve body 23 while balancing the force from the adjusting spring 27 with the force.

The pressure reducing valve for reducing the pressure in the pipeline usually has a valve box for the purpose of holding the pressure reducing mechanism and preventing the internal fluid from leaking to the outside. However, in a case where the valve box is to be attached to the flow path of the above-ground unit 3 as in the present invention, the function of the valve box is enabled by the flow pipe 12 in the above-ground unit 3. For this reason, as shown in FIG. 4, a valve box is not required for a pressure reducing valve to be mounted later, and a connecting mechanism of parts and a slide for moving internal parts are provided so that internal mechanical parts do not come off. A moving mechanism or the like is sufficient.

FIG. 5 is a view showing a case where it is not necessary to mount the pressure reducing valve 11 on the pressure reducing valve mounting portion 12a of the flow path pipe 12 because there is no large water level fluctuation in the well 1. FIG. As shown in FIG.
The second pressure reducing valve mounting portion 12 a is closed by a lid 18. An O-ring 19 for sealing is provided between the pressure reducing valve mounting portion 12 a and the lid 18. By providing the lid 18 on the pressure reducing valve mounting portion 12a in this manner, there is no possibility that the water supply in the flow pipe 12 flows out.

The water level in the well varies depending on the season and time, and the performance and the model are selected to be large with a margin such as the amount of water used and the pipe resistance. For this reason, when actually operating the pump, the water supply pressure at the above-ground portion often becomes much higher than the required pressure. If the pressure in the above-ground part is too high, the equipment and piping components in the above-ground part unit 3 will be damaged, and water will blow out from the water tap vigorously, resulting in a poor feeling of use. As a means to solve this, a pressure reducing valve is attached to the pipe between the submersible well pump and the above-ground unit, and the secondary pressure downstream of the pressure reducing valve is
There is a way to prevent it from rising above a certain pressure.

However, it is impossible to determine in advance that the water supply pressure at the ground level will be excessive.
The operation is performed, and it is found that there is an excessive pressure. For this reason, in order to solve the excessive supply water pressure, the piping must be redone to install the pressure reducing valve, and the pressure reducing valve must be mounted. In the present invention, as described above, the ground unit 3
A pressure reducing valve mounting portion 12a, for example, a mounting seat is provided so that the pressure reducing valve is mounted in advance on the flow path pipe 12, which is the flow path portion. This mounting seat is closed with a lid 18 as shown in FIG. 5 to prevent water from leaking. If there is not much rise in the pressure of the water supply above the ground and it can be used as it is, use it with the lid 18 left. When the pressure rise of the water supply on the ground is high and it becomes necessary to attach the pressure reducing valve 11, the cover 18 is removed and the pressure reducing valve 11 is attached to the pressure reducing valve mounting portion 12a.
Install. This makes it possible to easily attach the pressure reducing valve 11 without requiring any work to change the piping.

In the embodiment shown in FIGS. 1 to 5, the pressure reducing valve 11 is installed on the downstream side of the check valve 9, but the pressure detecting device 6 for detecting the discharge pressure and the submersible pump On the upstream side of the pressure tank 8 for holding the discharge pipe 5 during stoppage, the installation position of the pressure reducing valve 11 is in front of the check valve 9 and the flow rate detection device 7 in the above-ground unit 3. It may be on the downstream side.

[0019]

As described above, according to the present invention,
After installing a submersible pump in the well and installing the above-ground unit on the ground to complete the pipe connection work, start operation and the water supply pressure at the above-ground part is higher than necessary, which is inconvenient for using water Occurs, the water supply pressure at the above-ground portion can be easily changed to a favorable state by attaching the integrated pressure-reducing valve to the pressure-reducing valve mounting portion in the above-ground unit. On the other hand, if the pressure reducing valve is required from the beginning of the installation of the equipment, it can be attached to the pressure reducing valve mounting portion in the above-ground unit from the beginning.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a basic configuration of a water supply pump device of the present invention.

FIG. 2 is a longitudinal sectional view showing a detailed structure of a ground unit.

FIG. 3 is a view taken along line II-II in FIG. 2;

FIG. 4 is a sectional view showing a detailed structure of a pressure reducing valve.

FIG. 5 is a view showing a case where it is not necessary to attach a pressure reducing valve to a pressure reducing valve mounting portion of a flow path pipe because there is no large water level fluctuation in a well, and is a longitudinal sectional view of a ground unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Well 2 Submersible pump 3 Above-ground unit 4 Pumping pipe 5 Discharge pipe 6 Pressure detecting device 7 Flow rate detecting device 8 Pressure tank 9 Check valve 10 Faucet (water tap) 11 Pressure reducing valve 11a Mounting flange 12 Flow pipe 12a Pressure reducing valve Mounting part 13, 14 Flange 15 Unit cover 18 Lid 19 O-ring 20 Strainer

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Hironao Hiraiwa 11-1 Haneda Asahimachi, Ota-ku, Tokyo F-term in Ebara Corporation (reference) 3H020 AA01 AA08 BA02 BA03 BA04 CA01 CA04 DA01 EA02 EA03

Claims (4)

[Claims] 1. A submersible pump installed in a well, a water pump connected to the submersible pump, and a pressure detector connected to the water pump activates the submersible pump. A water supply pump device including a ground unit that controls the submersible pump to be stopped by a detection device, wherein a pressure reducing device for reducing the pressure of water supplied from the submersible pump is provided to a flow path pipe in the ground unit. A water supply pump device comprising a pressure reducing valve mounting portion for mounting a valve. 2. The pressure reducing valve mounting portion has a structure in which a mounting seat is provided on a flow path pipe, and without changing a connection pipe.
The water supply pump device according to claim 1, wherein the pressure reducing valve is detachable. 3. The water supply pump device according to claim 1, wherein the pressure reducing valve mounting portion is closed by a lid when the pressure reducing valve is not mounted. 4. The pressure reducing valve has a structure without a valve box,
The water supply pump device according to any one of claims 1 to 3, wherein the water supply pump device has a structure in which functions necessary for pressure reduction are integrated.