JPS646358B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to an automatic pump device, and particularly to one in which a bracket for supporting a motor and a base for supporting the entire device and having a liquid storage chamber are made of synthetic resin. It is.

[Background of the invention]

In the past, various attempts have been made to use synthetic resin for the bracket and base, but none of them have taken into account the attachment of the cover, the pressure accumulation chamber, etc.

[Purpose of the invention]

The present invention uses a simple synthetic resin mold, which makes the molding operation extremely easy.Furthermore, a cover can be attached with a simple structure, and a large airtight chamber and a pressure accumulation chamber can be formed with a simple structure. It is an object of the present invention to provide an automatic pump device that is capable of reducing the size of the entire device.

[Summary of the invention]

In the present invention, a motor stator 10 is attached to a bracket 1.
The motor shaft 8 is passed through the bracket 1 and the blade 15 is connected to the lower end thereof, and the suction port 27 communicates with the inlet port 37 of the blade 15 and the discharge port 22 of the blade 15. A base 26 having a discharge passage 33 is attached to the bracket 1, the bracket 1 and the base 26 are each made of synthetic resin, and the casing tube 12 is integrally formed on the lower surface of the bracket 1,
A vertical cylinder 31 is integrally formed on the upper surface of the base 26, and the bracket 1 is attached to the upper end of the vertical cylinder 31.
is removably attached to form a steam/water separation chamber 13, the outer circumference of the base 26 is made larger in diameter than the vertical cylinder 31, an outer circumferential wall 38 is raised on the upper surface of the outer circumferential portion, and a A step portion 39 is provided, a cover 40 is attached to the step portion 39, and the base 26
The entire lower part of the base 26 has an open shape, and a synthetic resin bottom plate 41 is inserted into the lower opening of the base 26 from below.
This automatic pump device is characterized in that it is attached via an elastic body 42 to form a gas chamber 43 and a pressure accumulation chamber 44.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described based on the drawings. Reference numeral 1 designates a bracket made of synthetic resin, and this bracket 1 has a shape that supports a motor in the upper part and forms a part of the pump casing and a steam/water separation chamber in the lower part, as will be described later. That is, reference numeral 2 denotes a supporting cylinder part integrally formed in a cylindrical shape above the bracket 1, and a large number of ribs 3 are also integrally formed in the vertical direction on the inner circumferential wall of this support cylinder part. A motor housing 5 made of a steel plate is detachably attached to the upper end of the support tube 2 by bolts 4. 6 is a bearing fixed to the motor housing 5, and 7 is a bearing fixed to the bracket 1. Reference numeral 8 denotes a rotating shaft rotatably supported by these bearings 6 and 7, and the lower end of this rotating shaft 8 is connected to the bracket 1.
It passes through the center of the bracket 1 and protrudes below the bracket 1. 9 is a rotor fixed to the rotating shaft 8; 10
is a stator whose upper part is fitted and fixed to the motor housing 5 and whose middle and lower parts are fitted to a number of ribs 3. 11 is a cooling vane attached to the rotating shaft 8. Reference numeral 12 denotes a casing cylinder integrally formed on the lower surface of the bracket 1, which houses the pump blades and guide passages within this casing cylinder 12,
Further, a steam/water separation chamber 13 is formed outside the casing tube 12. A boss 14 is fitted to the lower end of the rotating shaft 8, and around the boss 14, from below, a first blade 15, a first guide blade 16, a second blade 1
7 and the second guide vane 18 are coated so as to be stacked in this order. Reference numeral 19 denotes a lower casing tube that covers the blades and guide vanes and has an annular mouth portion 20 formed at the lower center end, and is fitted into the casing tube 12 in a watertight manner. Reference numeral 21 denotes a mechanical seal fixed to the bracket 1, which is intended to make the rotary shaft 8 passing through the mechanical seal watertight. The mouse section 2
0, the first guide vane 16 and the second guide vane 18 are brought into close contact with each other at the outer peripheral portion, and the first guide vane 16
has a predetermined gap in its central portion with respect to the outer periphery of the boss 14, so that even if the rotating shaft 8 runs out to some extent, rotation is not hindered. Reference numeral 22 denotes a discharge port formed in the first guide vane 16, through which water discharged from the outer periphery of the first vane 15 is discharged into the casing lower cylinder 1.
9 and then into the outer peripheral guide passage 23 along the inner surface of the casing tube 12. The water discharged in this way rises along the inner circumferential wall of the outer circumferential guide passage 23 and flows into the second impeller 17 through the inlet 24 opened at the center of the back (upper surface) of the second impeller 17. Pressurized again by The water discharged from the second vane 17 is transferred to the second guide vane 18
The air-water separation chamber 13 is
It is discharged inside. A base 26 is connected to the lower surface of the bracket 1 and constitutes a pressure accumulating chamber, and is made of synthetic resin like the bracket 1. Further, the bracket 1, the blades 15, 17,
The parts that come into contact with water, such as the guide vanes 16 and 18 and the base 26, are made of synthetic resin with air bubbles or vacuum bubbles as an intermediate layer, so they are free from vibrations and noise caused by cavitation and pulsation caused by water flow that occur inside the pump chamber. is absorbed by this synthetic resin material, and as a result, the operating noise can be reduced. this base 2
Reference numeral 6 has a downwardly open shape, and a suction port 27 is formed in the horizontal direction to communicate with, for example, a suction pipe that reaches a well. This suction port 27 opens on the lower surface of the first blade 15. Then, this opening 28 and the first
A rubber O-ring 29 is interposed between the mouth portion 20 of the blade 15 to maintain watertightness between the two.
Similarly to the suction port 27, 30 is a discharge port that opens in the horizontal direction of the base 26 and communicates with a water faucet (not shown). Reference numeral 31 denotes a vertical cylinder constituting the outer wall of the steam/water separation chamber 13, and a baffle plate 32 is formed on the inner wall of the cylinder to protrude inward as shown in the figure to promote the steam/water separation action. Reference numeral 33 denotes a discharge passage formed substantially perpendicularly in a part of the wall thickness of the vertical cylinder 31, the upper opening of which opens into the steam/water separation chamber 13, and the lower part communicating with the discharge port 30. 35 is bracket 1
This is a bolt through which the bracket 1 is fixed on the base 26. 36 is a packing interposed between 1 and the base 26 to make them watertight. 3
5' is a bolt screwed onto the lower end of the rotary shaft 8 for attaching the first blade 15 and the second blade 17 to the boss 14, and 37 is an inlet provided on the lower surface of the center of the first blade 15. Reference numeral 38 denotes an outer peripheral wall provided on the outer periphery of the vertical cylinder 31, and a stepped portion 39 is formed on the outer periphery of the upper end. A cover 40 is attached to the base 26 using the stepped portion 39 to protect the pump and motor configured as described above, and is made of a steel plate.

41 is a bottom plate made of synthetic resin that is fitted into the lower opening of the base 26 from below. Reference numeral 42 denotes an elastic body made of rubber that is held watertight between the base 26 and the bottom plate 41, and a pressure accumulation chamber 44 that communicates the space formed by the base 26 and the bottom plate 41 with a sealed gas chamber 43 and the discharge port 30. It is divided into In addition, gas chamber 4
3 may be filled with compressed gas in advance. 4
Reference numeral 5 denotes mounting holes formed at multiple locations on the outer periphery of the base 26 for mounting to external mounting locations with bolts (not shown). Moreover, the elastic body 4
2 indicates, for example, the dotted line 4 when the pressure in the pressure accumulating chamber 44 exceeds the pressure in the gas chamber 43.
2'.

Next, the operation of the pump device configured as described above will be explained. When the motor is energized, the pump rotates, and the well water flows from the suction port 27 to the inflow port 37.
through the first blade 15, and this first blade 1
The water given velocity and pressure energy in step 5 rises from the discharge port 22 through the outer circumferential guide passage 23 and reaches the inflow port 24.
leading to. Further, the water that has flowed into the second blade 17 is given pressure and velocity energy again by the second blade 17, and is discharged from the discharge port 22 into the steam/water separation chamber 13. The water discharged into the air-water separation chamber 13 is separated into bubbles (air) and water by horizontal ribs 32, vertical ribs 32', etc., and the separated water is returned to the pump chamber through a return hole (not shown). The air flows in, gradually draws in the air near the suction port 27, separates it, circulates it, and discharges the air to the outside from the discharge port 30. When the air in the pump chamber and the suction side is discharged to the outside, the pressure in the suction port 27 decreases, the well water is sucked up, and self-priming is completed. The water pressurized by the pump is communicated with the faucet through the steam/water separation chamber 13 and the discharge passage 33, and is sent to the discharge port 30. At this time, if the pressure of the water discharged from the pump is higher than the pressure in the gas chamber 43, the elastic body 42 bends as shown by the dotted line 42', and the pressure in the liquid storage chamber 44 and the pressure in the gas chamber 43 are balanced. There is. Usually, a pressure switch is installed on the discharge side of the pump, and this pressure switch opens when the faucet is closed and the pressure on the discharge side exceeds a predetermined pressure, stopping the pump and opening the faucet. When the pressure drops below a predetermined pressure, it closes and activates the pump.

According to this automatic pump device, the bracket 1 and the base 26 are each made of synthetic resin, the casing cylinder 12 is integrally formed on the lower surface of the bracket 1, and the vertical cylinder 31 is integrally formed on the upper surface of the base 26. However, since the bracket 1 is removably attached to the upper end of this vertical cylinder 31 to form the air/water separation chamber 13, the complexity of the shapes of the bracket 1 and the base 26 is evened out, and thereby the synthetic resin molding The mold is simplified, and as a result, the molding operation becomes significantly easier. In addition, since the parts that come into contact with water, such as the bracket 1, vanes 15, and base 26, are made of synthetic resin with air bubbles or vacuum bubbles as an intermediate layer, vibrations caused by cavitation and pulsations caused by water flow that occur inside the pump chamber are avoided. , can absorb noise and reduce operating noise. Furthermore, the outer circumference of the base 26 is made larger in diameter than the vertical cylinder 31, an outer circumferential wall 38 is raised on the upper surface of the outer circumferential portion, a stepped portion 39 is provided on the outer circumferential portion of the upper end of the outer circumferential wall 38, and a cover 40 is attached to the stepped portion 39. Since the cover 40 is attached, the cover 40 can be attached with a simple structure. Moreover, the entire lower part of the base 26 having a large diameter is made open, and a synthetic resin bottom plate 41 is attached from below to the lower opening of the base 26 via an elastic body 42 to form a gas chamber 43 and a pressure accumulation chamber 44. Since the large gas chamber 43 and the pressure accumulation chamber 44 can be formed with a simple structure, it is possible to downsize the entire device.

〔Effect of the invention〕

According to the present invention, the complexity of the shapes of the bracket and the base is averaged out, thereby simplifying the synthetic resin molding die and, as a result, significantly facilitating the molding operation. The cover can be attached with a simple structure, and a large gas chamber and pressure accumulation chamber can be formed with a simple structure.
It is possible to downsize the entire device.

[Brief explanation of drawings]

The drawing is a longitudinal sectional view showing an embodiment of the present invention. 1...Bracket, 2...Support cylinder part, 12...
Casing tube, 13... Steam/water separation chamber, 23... Outer guide passage, 26... Base, 27... Suction port,
31...vertical cylinder, 33...discharge passage, 44...liquid storage chamber.

Claims (1)

[Claims] 1 Place the motor stator 10 on the bracket 1, pass the motor shaft 8 through the bracket 1, connect the blade 15 to its lower end, and connect the blade 1 to the bracket 1.
A base 26 having a suction port 27 communicating with the inlet port 37 of the blade 5 and a discharge passage 33 communicating with the discharge port 22 of the blade 15 is attached to the bracket 1, and the bracket 1 and the base 26 are each made of synthetic resin. A casing cylinder 12 is integrally formed on the lower surface of the bracket 1, a vertical cylinder 31 is integrally formed on the upper surface of the base 26, and the bracket 1 is detachably attached to the upper end of the vertical cylinder 31. The outer circumference of the base 26 is made larger in diameter than the vertical cylinder 31, an outer circumferential wall 38 is raised on the upper surface of the outer circumferential portion, and a stepped portion 39 is provided on the outer circumferential portion of the upper end of the outer circumferential wall 38. Provided, this step 3
A cover 40 is attached to the base 26 so that the entire lower part of the base 26 is open, and a synthetic resin bottom plate 41 is attached from below to the lower opening of the base 26 via an elastic body 42 to form a gas chamber 43 and a pressure accumulation chamber. 44
An automatic pump device characterized by comprising: