JPH07293496A - Submerged pump - Google Patents

Abstract

PURPOSE:To provide a submerged pump which has simple construction and a small number of part items and which can easily be assembled. CONSTITUTION:A pump casing 22 is formed at the lower part of an outer cylinder 20, which accommodates a motor 21, as an integrated body. A bottom plate 25 with a surrounding wall 24 equipped with a plurality of water running notches is attached in a freely attachable manner to the lower part of the outer cylinder 20. In addition, an intaking part 26 having the straining function is provided to the lower surface of this bottom plate 25.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small-sized submersible pump having a simple structure suitable for household use.

[0002]

2. Description of the Related Art FIG. 4 shows an example of a conventional submersible pump, wherein 1 is an outer cylinder accommodating a motor 2 and 3 is fixed to a lower end of a motor accommodating portion 4 in the outer cylinder 1 by a plurality of bolts 5. The shaft 6 of the motor 2 penetrates the center of the tubular bracket, and an oil seal 7 is attached to the outside to keep the watertight.

Reference numeral 8 is a pump casing, 9 is a strainer provided at the bottom of the pump casing 8, and the strainer 9
When the male screw on the upper inner periphery of the peripheral wall 10 is screwed into the male screw on the outer periphery of the lower end of the outer cylinder 1, the outer peripheral edge of the bottom of the casing 8 is sandwiched and fixed between the lower end of the outer cylinder 1 and the upper surface of the strainer 9.

A strainer net 11 is attached to the lower center of the strainer 9, and an impeller 12 fixed to the lower end of the shaft 6 is fitted into the spiral chamber 13 in the casing 8. The other 14 is a power cord connected to the motor 2 and has a watertight structure.
Is pulled out to the outside.

In this conventional submersible pump, when the motor 2 is energized to drive the impeller 12 in a state of being submerged in water,
The water filtered by the strainer net 11 to remove foreign matters is sucked into the swirl chamber 13 from the suction port 16 at the center of the casing 8, swirls out into the outer cylinder 1, and is discharged from the discharge port 17 at the upper end thereof to the pump hose. It is sent to 19.

[0006]

Since the conventional submersible pump as described above has a large number of parts as shown in the figure, the number of sealing parts is large, water leaks easily and the number of steps for forming and assembling each member is large. There was a problem that the cost was high.

An object of the present invention is to solve the problems of the conventional submersible pump as described above, and to provide a submersible pump which has a small number of parts and therefore has a small risk of water leakage and is easy to assemble. Is.

[0008]

In order to solve the above-mentioned problems, according to the present invention, a pump casing is integrally formed in a lower portion of an outer cylinder accommodating a motor, and a plurality of water cutouts are provided in the lower portion. A bottom plate having a peripheral wall is detachably mounted, and a suction part having a strainer function is provided on the bottom plate. Further, the suction portion having the strainer function is provided with a plurality of fins extending downward from the periphery of the suction hole provided in the bottom plate, and the inner ends of the lower ends of the fins are connected by an end plate so that the space between the fins is reduced. Is connected to the suction hole.

[0009]

In this submersible pump, since the pump casing is integrally provided in the lower portion of the outer cylinder, the impeller is fixed to the motor shaft projecting into the pump casing during assembly, and then the bottom plate is attached to the lower end of the outer cylinder. When the is installed, the suction portion provided on the bottom plate and having a strainer function is located below the impeller.

Therefore, it is possible to save labor such as mounting a strainer net like a conventional submersible pump.

[0011]

EXAMPLE In the example shown in FIG. 1 to FIG.
Is an outer cylinder accommodating the motor 21, and a pump casing 22 is integrally formed in a lower portion of the outer cylinder 20, and a bottom plate 25 having a peripheral wall 24 provided with a plurality of water cutouts 23 is detachably attached to the lower portion thereof. However, the outer cylinder 20 and the peripheral wall of the outer peripheral upper portion of the bottom plate 25 are coupled to each other by the engagement of the protrusion and the notch or the coupling by a screw. Further, a suction portion 26 having a strainer function is provided on this bottom plate.

Suction portion 26 having the above strainer function.
Is provided with a plurality of fins 31 extending downward from the periphery of the suction hole 30 provided in the bottom plate 25, and the inner ends of the lower ends of the fins 31 are connected by an end plate 27 so that the space between the fins 31 is connected to the suction hole. It is configured to communicate with 30.

The motor 21 is fitted in a cylindrical motor accommodating portion 32 integrally formed in the outer cylinder 20, and the casing 22 is integrally formed at the lower end thereof. Further, the impeller 34 is fixed to the lower end of the shaft 33 below the motor 21 and fitted into the casing 22. As shown in FIG. 3, the casing 22 has a spiral shape and the outlet 35 on the outer side is the outer cylinder 20.
It communicates with the discharge port 36 at the upper end through the inside. Also, the shaft 33
An oil seal 37 is provided at a portion penetrating the lower end of the motor accommodating portion 32 to maintain watertightness.

In addition, reference numeral 38 denotes a power cord connected to the motor 21, which has a watertight structure, and is pulled out to the outside through a gland packing 39 on the upper portion of the outer cylinder 20.

Reference numeral 40 denotes a packing receiver fitted in the upper portion of the motor accommodating portion 32, and reference numeral 41 denotes a packing retainer on the upper portion thereof, which is screwed and fixed to a female screw on the inner periphery of the upper end of the motor accommodating portion 32. 42 is a rubber packing sandwiched between the receiver 40 and the presser foot 41.

The operation of the above embodiment will be described. When the motor 21 is energized to drive the impeller 34 in a state of being immersed in water, the fins 3 of the suction portion 26 having a strainer function.
The water that has been filtered to remove foreign matter while passing through the space 1 is sucked into the spiral casing 22 from the suction hole 30 through the space between the fins 31, and while swirling, the water is discharged from the outlet 35 through the outer cylinder 20.
And then the pump hose 43 is discharged from the discharge port 36 at its upper end.
Sent to.

[0017]

As described above, according to the present invention, the outer cylinder and the pump casing are integrated as described above, and the suction plate having a strainer function is integrally provided on the separate bottom plate. Therefore, both are made of hard plastic or the like. Then, it can be easily assembled only by connecting them by means such as screwing.

Further, since the suction portion having the strainer function has a very simple structure in which the fins are radially provided around the protrusion provided at the center thereof, it is possible to save the labor of attaching and detaching the strainer net as in the conventional case. Has the effect of.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of an embodiment.

FIG. 2 is a bottom view of the above.

FIG. 3 is a sectional view taken along line AA of FIG.

FIG. 4 is a vertical sectional front view of a conventional example.

[Explanation of symbols]

 20 Outer Cylinder 21 Motor 22 Pump Casing 23 Water Cutout 24 Circumferential Wall 25 Bottom Plate 26 Suction Part Having Strainer Function 27 Projection 30 Suction Hole 31 Fin

Claims (2)

[Claims] 1. A pump casing is integrally formed in a lower portion of an outer cylinder accommodating a motor, and a bottom plate having a peripheral wall provided with a plurality of water cutouts is detachably attached to the lower portion, and a strainer function is provided on the bottom plate. A submersible pump comprising a suction part having a. 2. The suction part having the strainer function is provided with a plurality of fins extending downward from the periphery of the suction hole provided in the bottom plate, and the inner ends of the lower ends of the fins are connected by an end plate, and the fins are connected to each other. The submersible pump according to claim 1, wherein a space between the two is communicated with the suction hole.