JPH1182395A - Feed water pump for high story or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To operate a feed water pump with high durability without the generation of dew condensation in a motor part of a feed water pump for a high story or the like, which feeds the purified water, the factory water or the like to the high story of a building or the like. SOLUTION: In a feed water pump for high story where a motor part 2 and a pump part 4 are connected in a condition that they are water tightly partitioned through an intermediate bracket 3 through which a motor shaft 9 is penetrated, whereby the feed water of the pump part 4 is flown to an outer peripheral part of the motor part 2 to cool the motor part 2, and the noise can be prevented, one edge of the motor part 2 is conducted to an external from the intermediate bracket 3, the other edge of the motor part 2 is conducted to an external through a motor bracket 17, and the air is flown in the motor part 2 by a fan to prevent the generation of the dew condensation in the motor part 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water pump for high floors and the like for supplying purified water, factory water and the like to a high floor building and the like in the field of pumps.

[0002]

2. Description of the Related Art In recent years, water has been supplied directly from the lower floor of a large city without installing a septic tank or a water storage tank in a water supply device of a high-rise building, a house, an apartment, or the like. became.

For this reason, a water supply pump is connected to a water supply pipe on the lower floor, and water is supplied to the upper floor at a required water supply pressure.

[0004] In this conventional water supply pump, since the pump is constantly driven, the water is supplied to the outer peripheral surface of the motor so that the motor side is not overheated, and the motor is cooled so as to be effective.

In addition, a mechanical seal is attached to a shaft portion on the pump side, and a discharge port for discharging water leakage is provided on the motor side so that water does not enter the motor in case of water leakage.

[0006]

However, the motor section of the conventional water supply pump has a semi-hermetic structure in which a vent hole is opened on the pump side, and although the air enters the motor section, the motor section is substantially cooled. Since the motor is cooled by supplying water to the outer periphery of the motor, condensation may occur in the motor, especially in the stator windings, which may promote insulation failure or cause the motor bearing grease to lose moisture. This causes deterioration of grease and causes trouble of the motor. Therefore, it was an issue to develop a durable water supply pump that does not cause trouble.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and in order to solve the above-mentioned problems, a motor unit and a pump unit are connected via an intermediate bracket penetrating a motor shaft. Water-tight bulkheads are combined to supply purified water, factory water, etc., which circulates the water supply from the pump section to the outer periphery of the motor section to cool the motor section and to prevent noise. A water supply pump for a high floor or the like for feeding to a high floor, etc., in which one end of the motor portion is conducted from the intermediate bracket to the outside, and the other end of the motor portion is conducted to the outside via the motor bracket, and the inside of the motor portion is provided. It is an object of the present invention to provide a water supply pump for high floors or the like, characterized in that air is circulated by a fan to prevent dew formation in the motor section.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a water supply pump for a high floor or the like according to the present invention, a motor section and a pump section are connected by a watertight partition wall through an intermediate bracket penetrating a motor shaft to supply water to the pump section. Is supplied to the upper floor of a building or the like to supply purified water, factory water, etc. to the outer periphery of the motor section to cool the motor section and to prevent noise, and to supply the water to a higher floor of a building or the like. Thus, one end of the motor section is conducted from the intermediate bracket to the outside, and the other end of the motor section is conducted to the outside via the motor bracket, so that the fan circulates the air in the motor section and no dew condensation occurs in the motor section. It is characterized by doing so.

The water supply pump 1 is, as shown in FIG.
, A pump unit 4 is connected to the pump unit 4 through an intermediate bracket 3 in a watertight manner, and water is sucked in from a suction port 5 at an end face of the pump unit 4.
The multi-stage impeller 6 pressurizes to a predetermined pressure and sends it to the outer periphery of the motor unit 2 as shown by the arrow, cools the motor 7 and discharges it from the discharge port 8 on the end face of the motor unit 2. I have.

The impeller 6 of the pump unit 4 is mounted on the motor shaft 9 of the motor unit 2 which penetrates through the intermediate bracket 3 and protrudes toward the pump unit 4 side. Mechanical seal 10 in 3 parts
To prevent water leakage from the pump section 4.

The motor shaft 9 between the intermediate brackets 3 is exposed as shown in FIG. 1, and a drainer 11 is particularly provided to prevent water from entering the motor 2. And even if there is a leak from the seal 10 of the mechanical seal,
A discharge port 12 for discharging water leakage is opened in the intermediate bracket 3 as shown in the figure so that it can be discharged outside.

On the other hand, the motor portion 2 has a motor cooling tube 13 concentrically disposed on the outer periphery thereof, and a cooling tube formed between the motor portion 2 and the motor cooling tube 13. The supply water from the pump unit 4 is circulated through the flow passage 14 to cool the motor unit 2, and the motor cooling cylinder 13 also enhances the soundproofing effect of the motor unit 2.

In order to communicate the motor portion 2 with the outside, an air flow passage 16 having a predetermined hole diameter is opened in the intermediate bracket 3 of the motor portion 2 as shown in FIGS. As shown in FIG. 1, an air flow pipe 18 communicating with the outside is integrally provided on the motor bracket 17 side so as to protrude from the motor end bracket 19, and penetrates the motor bracket 17 in a watertight manner and protrudes to the outside.

In this manner, the cooling brackets 20 projecting from both sides of the rotor 9 of the motor section 2 allow the intermediate bracket 3
The air is circulated from the side to the motor bracket 17 side or the opposite direction to cool the inside of the motor section 2 so that the temperature gradient with the outer peripheral section of the motor section 2 is moderated so that dew condensation does not occur in the motor section 2. it can.

A pipe is connected to the air flow passage 16 of the intermediate bracket 3 or the air flow pipe 18 on the side of the motor bracket 17, and a forced cooling fan such as a sirocco fan is provided on the pipe to provide external cooling. A predetermined amount of air may be supplied to the motor unit 2 by a fan to cool the motor unit 2.

The water supply pump 1 is suitable for lifting a high-rise building, but can also be used for supplying water to a distant place.

[0017]

1 to 3 show an embodiment of the present invention for supplying water to a high-rise building. The water supply pump 1 is a small type having an outer diameter of 180 mm and a length of about 520 mm, and can be installed on a required wall surface of a building by connecting to a water supply pipe.

As shown in FIG.
At a distance of 5 mm, a stainless steel motor cooling cylinder 13 is attached in a watertight manner with a tie rod 21 via a motor bracket 17 to supply water from the pump section 4 to the outer peripheral surface of the motor section 2 as shown by an arrow. The motor part 2 is circulated through the passage 14 to be cooled. 22 is the motor unit 2
Intermediate bracket 3 having the same cross-sectional shape communicating with the flow passage 14
Reference numeral 23 denotes a water supply passage hole, and a lead wire outlet hole.

Then, an air flow passage 16 communicating with the motor unit 2 is opened in the intermediate bracket 3 as shown in FIGS.
Also, an air flow pipe 18 is protruded from a motor end bracket 19 on the motor bracket 17 side to form a motor bracket 17.
Penetrates water-tightly through the
The outside air is sucked into the motor unit 2 by the cooling fan 20 of
The motor unit 2 is discharged to cool the motor unit 2.

Therefore, despite the supply of water from the pump section to the outer periphery of the motor section, air can be circulated from the outside to the motor section, the inside of the motor section can be cooled, and the outside of the motor section cooled by the supply water can be connected. Can be reduced.

Further, a drain port 12 is provided in the intermediate bracket 3 between the motor section 2 and the pump section 4 so that an unexpected leakage of water from the seal 10 of the mechanical seal of the pump section 4 is prevented.
2 can be discharged to the outside.

Therefore, even if water leaks from the pump section, it can be prevented from infiltrating into the motor section, and the outer periphery of the motor section can be cooled and the inside of the motor section is easily condensed. It is possible to prevent the occurrence of dew condensation on the stator windings in the motor portion to promote insulation failure, and to prevent the generation of moisture in the grease of the motor bearing to deteriorate the grease, and to operate the water supply pump with high durability.

[0023]

FIG. 4 shows another embodiment of the present invention. In this embodiment, a pipe 24 is connected to the air flow pipe 18 of the previous embodiment, and a forced cooling fan 25 such as a sirocco fan is provided. It is distributed. In addition, it is also possible to connect a pipe to the air flow passage 16 of the intermediate bracket 3 and to dispose a forced cooling fan on the intermediate bracket 3 side.

In this embodiment, the air can be sufficiently circulated to the motor section by the external cooling fan, and the inside of the motor section can be cooled.

Further, a temperature sensor or a humidity sensor may be provided inside the motor unit, and the cooling fan may be driven and controlled within a predetermined temperature and humidity within the motor unit.

The present invention can also be applied to a case where the motor portion is formed by resin molding, or a case where the motor portion and the motor cooling cylinder are integrally formed by resin molding.

In the embodiment, the water supply is discharged from the pump section to the motor section, but it is also possible to draw water from the motor section and discharge it from the pump section.

[0028]

As described above, in the present invention, the water supply from the pump section can be distributed to the outer peripheral portion of the motor section to cool the motor section, and the motor section can be cooled by flowing air to the inside of the motor section. Can be avoided, and the water supply pump can be operated with high durability.

Also, a cooling fan is provided outside the water supply pump, and a connecting portion for connecting the cooling fan to the outside of the motor section is connected to the cooling fan by piping. By cooling the inside of the section, the inside of the motor section can be cooled to an appropriate temperature, and the effect can be obtained as described above.

Further, a temperature sensor or a humidity sensor is provided in the motor section, and the cooling fan is operated based on the temperature sensor or the humidity sensor to control the inside of the motor section to a desired temperature and humidity. The effect can be achieved as shown in FIG.

[Brief description of the drawings]

FIG. 1 is a longitudinal half sectional view of an embodiment of the present invention;

FIG. 2 is a front view of the intermediate wall,

FIG. 3 is a cross-sectional view of the upper half of the intermediate wall,

FIG. 4 is a longitudinal half cross-sectional view of another embodiment of the above, with some parts omitted.

[Explanation of symbols]

1 ... water supply pump 2 ... motor section 3
… Intermediate bracket 4… Pump part 5… Suction port 6
... impeller 7 ... motor 8 ... discharge port 13
... Motor cooling cylinder 16 ... Air flow passage 17 ... Motor bracket 1
8 ... Air flow pipe 20 ... Cooling fan 25 ... Cooling fan

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI H02K 9/06 H02K 9/06 C 9/24 9/24 B

Claims (3)

[Claims] 1. A motor unit and a pump unit are joined by a watertight partition wall through an intermediate bracket penetrating a motor shaft, and water supplied from the pump unit is circulated to an outer peripheral portion of the motor unit to cool the motor unit. Purified water that prevents noise and
A water supply pump for a high floor or the like that supplies factory water or the like to a high floor or the like of a building or the like, wherein one end of the motor unit is electrically connected to the outside from the intermediate bracket, and the other end of the motor unit is connected to the other via the motor bracket. A water supply pump for high floors or the like, characterized in that it is electrically connected to the outside and air is circulated by a fan in the motor section so that dew condensation does not occur in the motor section. 2. A cooling fan is provided outside of the water supply pump, and a connecting portion of the cooling fan to the outside of the motor section is connected to the cooling fan by piping so that air flows into the motor section via the external cooling fan. The water supply pump according to claim 1, wherein the water supply pump is for a high floor or the like. 3. The water supply pump according to claim 2, wherein a temperature sensor or a humidity sensor is provided in the motor section, and the cooling fan is operated based on the temperature sensor or the humidity sensor.