JP3333809B2 - Water pressure device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water supply pressurizing apparatus having a plurality of pumps and a control unit which is separated therefrom and which can be pulled out of the housing.

[0002]

2. Description of the Related Art A device for pressurizing and supplying tap water from a water main to a building or an apartment house in an urban area changes the number of revolutions of a pump in accordance with the water pressure from the water main and changes in the water supply side. In addition, pressure control is performed so as to compensate for a decrease in water pressure on the water supply side. Therefore, a control device including a microcomputer is provided in the feedwater pressurizing device. Further, the water supply pressurizing device is usually provided at a base portion or a basement portion of a building to be supplied with water from a water main buried in a road or the like via a water meter and a distribution pipe. Furthermore, in recent years, it has been required to reduce the installation space of a feedwater pressurizing device in a building, and it has become common to house these pumps, pressure tanks, water control valves, etc. compactly in a housing and install them. ing.

[0003]

When a piping portion such as a bomb, a pressure tank and a water control valve is housed in such a housing,
The functions of the control devices attached to them may be impaired by the dew condensation from the piping portion due to moisture, oil or other dust. Therefore, it has been considered that the control device is physically located at a distance from these pipe portions. However, there is a problem that the size of the entire feedwater pressurizing device is increased.

[0004]

SUMMARY OF THE INVENTION In order to protect the electrical components, including the control device, from moisture condensation and other obstructions from the piping within the housing, the present invention provides a plurality of pumps and pressure tanks in a closed housing. And a water supply pipe connected to the discharge side of these pumps, and a pressure detecting means connected to the water supply pipe,
A control device having a motor connected to and driving the pump, variable speed means for changing the rotation speed of the pump, and means for detecting the pump rotation speed, and a suction pipe and a water supply pipe on the discharge side of the pump are check valves. In the variable-speed water supply device connected via a pipe, a pipe part such as a pump, a pressure tank, a water control valve, and an electric part including a control device part and a variable-speed means are separated by a plate made of a heat-insulating and moisture-proof material. It is made to be done. In addition, in order to facilitate means such as inspection and repair of the electrical components, the control device portion is housed in an extraction housing that is freely mounted on and removed from rails provided on the inner wall surface of the housing. Have been. If necessary, the extraction housing can be removed from the housing together with the control device.

[0005] When the feed water pressurization device housed in the closed type housing is operating, since the electrical components are in an energized state, energy loss occurs due to copper loss, iron loss, etc., and heat is generated.
Among these electrical components, the one that generates the largest amount of heat is the variable speed means that electrically performs high-speed switching in the device. If the variable speed means is allowed to cool naturally, the calorific value will increase and adversely affect the electrical components including the variable speed means itself.Therefore, use forced cooling means such as air cooling, liquid cooling, etc. I try to keep it.

In the present invention, the control unit is placed in the atmosphere of the heat generated by the variable speed means and the forced cooling atmosphere, and these are separated from the water circulating parts such as a pump, a pressure tank, a water control valve, etc. The control unit can be protected from condensation and other obstacles. In addition, by extracting or taking out the extraction housing containing the control device from the housing of the feed water pressurization device as necessary, inspection and repair of the electrical components including the control device can be easily performed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to a feed water pressurizing device housed in a closed type housing shown in FIG. The feed water pressurizing device 1 includes pumps 2, 2, a pressure tank 3, a suction pipe 4, a discharge pipe 5, a pipe section including a pressure detector 6 for measuring the pressure of the discharge pipe section, a variable speed means 7, and an appropriate discharge pressure. And an electrical part comprising a control device 8 for calculating the following. In the housing, the pipe portion and the electrical component are separated by a separation wall 9 made of a heat-insulating and moisture-proof material. Although the separation wall is simply one iron plate, a heat insulating material, a moisture proof material and the like are laminated as needed. .

In the lower part of the separation wall 9, pump parts including pumps 2, 2, a pressure tank 3, a suction pipe 4, a discharge pipe 5, and a pressure detector 6 for measuring the pressure of the discharge pipe part are appropriately arranged. A bypass pipe (not shown) for directly supplying water from the main pipe to the water supply passage is also provided between the suction pipe 4 and the discharge pipe 5. On the upper part of the separation wall 9, an electric part including the variable speed means 7 and the control device 8 is arranged.

Since the variable speed change means 7 generates the largest amount of heat among the electrical components, the variable speed change means 7 is provided inside or outside the housing above the separation wall.
If necessary, a forced cooling means 10 for cooling by water or air is attached to suppress a temperature difference of 25 to 30 ° C. with respect to an ambient temperature. For this reason, the absolute humidity inside the closed enclosure is now 85%,
Even if the temperature is −5 ° C., the temperature of the electrical component area at the upper part of the housing is maintained at 20 to 25 ° C., and the relative humidity of the area is lower than that of the piping part at the lower part of the housing. Therefore, dew condensation does not occur on the surface of the electrical component, and the normal function of the control device is not impaired.

Further, the separating wall 9 is mounted on a rail-shaped metal fitting 11 whose both ends are fixed to the inner wall surface of the closed casing 1 so that it can be pulled out or removed from the entire surface of the casing. Have been. For this reason, while operating the feed water pressurizing device 1 for a long period of time, it is necessary to read out the instruments attached to the electrical parts as needed, or to pull out or take out the electrical parts from the housing for inspection, repair, etc. Can be done.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a feed water pressurizing device according to the present invention.

FIG. 2 is a perspective view showing a state in which a movable separation wall of the feed water pressurizing device according to the present invention is housed in a housing.

FIG. 3 is a perspective view showing a state in which a movable separation wall of the water supply / pressurization device according to the present invention is drawn out of a housing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water supply pressurizing device 2 Pump 3 Pressure tank 4 Suction pipe 5 Discharge pipe 6 Pressure detector 7 Variable speed means 8 Control device 9 Separation wall 10 Forced cooling means 11 Rail-shaped bracket

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) E03B 5/00 F04D 13/16 F04D 15/00 F04D 29/00

Claims (2)

(57) [Claims] A plurality of pumps and a pressure tank in a closed housing, a water supply pipe connected to a discharge side of the pumps,
A control device having a pressure detecting means connected to the water supply pipe, a motor connected to and driving the pump, a variable speed means for changing the rotation speed of the pump, and a means for detecting the pump rotation speed; In a variable-speed water supply device in which a pipe and a water supply pipe on the discharge side are connected via a check valve, a pipe portion including a pump, a pressure tank, a water control valve, and the like, and an electrical component including a control device and a variable speed means. Are separated by a plate made of a heat-insulating and moisture-proof material , and the control device and the variable speed
The housing-contained water supply / pressurizing device according to claim 1, wherein the electrical part including the means is drawn out of the housing and can be housed. 2. The housing storage type water supply pressurization according to claim 1 , wherein said electric component is housed in an extraction housing mounted on a rail provided on an inner wall surface of the housing so as to be freely inserted and removed. apparatus.