JP3125201B2 - Submersible pump for equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small and lightweight submersible pump for a facility which is installed and used in a pit such as a manhole, and more particularly to an installation work performed by a worker in a pit such as a narrow manhole. TECHNICAL FIELD The present invention relates to a submersible pump for equipment that can be easily installed in a pit without being installed.

[0002]

2. Description of the Related Art In manholes through which sewage and the like flow,
There is a submersible pump for equipment that pumps up the sewage stored in the manhole and flows it back into the sewage. Such a submersible pump for equipment usually has a motor arranged at an upper part and a pump casing arranged at a lower part, and an impeller arranged in the pump casing is rotated by the motor, so that the pump The fluid is sucked into the casing. The fluid sucked into the pump casing is discharged from a discharge port provided on a side of the pump casing.

[0003] Further, since such a submersible pump for equipment is relatively lightweight, a handle is provided on a head cover provided on an upper portion of a motor, and the handle is gripped by hand when being carried. It has become.

In such a submersible pump for equipment, the submersible pump for equipment is suspended by a chain on the side wall of the manhole so that the submersible pump can be installed in the manhole without working in the narrow manhole. Along the guide rails arranged vertically along the
It is designed to be installed at a predetermined position in the manhole. A connection pipe connected to a submersible pump suspended by a chain is arranged in the manhole.

[0005] The connecting pipe disposed in the manhole is in a horizontal state, and has an engaging portion at one end for engaging with a connecting pipe attached to the submersible pump. The other end of the connecting pipe is curved upward,
A vertical pipe disposed along the inside of the manhole is connected to the end.

When the submersible pump is suspended in the manhole, the engaging part of the connecting pipe attached to the submersible pump and the engaging part of the connecting pipe disposed in the manhole are engaged with each other. Thus, the entire submersible pump needs to be in a vertical position or a predetermined inclined position.

Japanese Utility Model Laid-Open No. 5-1588 discloses a structure in which a handle provided on a head cover of a submersible pump for equipment is provided with a through hole penetrating vertically.
The lower end of the chain is inserted into the through hole provided in the handle, and the shackle is attached to the lower end of the chain so that the inserted chain does not come out of the through hole, and is prevented from falling out. I have.

[0008] Thus, the equipment submersible pump attached to the lower end of the chain is supported at one point of the through-hole when suspended by the chain. Since the connecting pipe is attached to one side of the underwater pump for equipment, the position of the center of gravity of the whole is slightly deviated toward the side to which the connecting pipe is attached. As a result, the submersible pump suspended from the chain assumes a slightly inclined posture such that the side to which the connecting pipe is attached is on the lower side. Then, when the manhole is lowered in the manhole in such a state, the engaging part of the connecting pipe and the engaging part of the connecting pipe arranged in the manhole are smoothly engaged.

[0009]

However, in such a submersible pump for equipment, since the width direction of the handle portion is horizontal, if the through hole is formed in the handle portion in the up-down direction, the handle portion itself is not provided. However, there is a problem that the strength is reduced. If the width of the handle is increased in order to improve the strength of the handle, there is a problem that the handle becomes difficult to grip when carrying the submersible pump. Further, the size of the through hole formed in the handle portion is limited by the width direction size of the handle portion. Therefore, if the chain ring becomes large, the through hole cannot be inserted and cannot be used.

Further, when the submersible pump is suspended by the chain, a part of the shackle is in contact with the lower side of the through hole in the handle, so that the impact of the chain or the like is directly applied to the shackle. In addition, the handle may be damaged.

An object of the present invention is to solve such a problem, and an object of the present invention is to provide a submersible pump for equipment having sufficient strength and having a handle portion which is easy to hold. It is another object of the present invention to provide a submersible pump for equipment which is not likely to be damaged by an impact applied to a chain or the like when being suspended in a pit such as a manhole by being suspended by a chain or the like.

[0012]

The underwater pump for equipment according to the present invention is installed in a pit and rotates an impeller in a pump casing provided at a lower part by a motor arranged at an upper part. A pump, which can be grasped when being carried on an upper part of a head cover arranged above the motor, and has a flat handle extending linearly in a horizontal direction in a vertical state with its thickness direction being a horizontal direction. The grip portion is provided integrally with a through-hole penetrating the handle portion in a horizontal direction.

In the submersible pump for equipment of the present invention, a sleeve formed of an elastic body is fitted into the through hole.

[0014]

In the submersible pump for equipment of the present invention, a shackle bolt is inserted into a horizontally penetrating through hole provided in a horizontally extending flat handle portion, and the shackle is attached. Locked to the chain. Then, when the entire submersible pump for equipment is suspended by the chain, the chain is in a state of being supported at one point at the position of the through-hole, and the submersible pump is in a predetermined inclined state corresponding to the gravity position, and the inside of the pit Descend. Then, the submersible pump is installed in a state where the submersible pump is engaged with the connecting pipe arranged in the pit.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a partially cutaway side view showing an example of a submersible pump according to the present invention. This submersible pump is installed and used in a manhole, for example, to pump up sewage containing dirt and foreign matter. This submersible pump has a lower pump casing 10 in which an impeller 11 is disposed.
And a motor 20 arranged above the pump casing 10.

The motor 20 includes a cylindrical stator casing 21 having a vertical axis, and a rotor shaft 2 inserted through the axis of the stator casing 21.
3 and a stator 24 attached to the inner peripheral surface of the stator casing 21 so as to surround the rotor 22.

A disk-shaped bearing bracket 25 is fitted to the lower end of the stator casing 21. The bearing bracket 25 covers the lower end surface of the stator casing 21 in a state where an appropriate space is formed around the rotor shaft 23 with the upper surface of the lower pump casing 10. The rotor shaft 23 extends through the bearing bracket 25, passes through the space between the bearing bracket 25 and the pump casing 10, and extends into the pump casing 10. Rotor shaft 2
3 is rotatably supported by a bearing bracket 25 by a bearing 26.

A head cover 50 in which an electric system is accommodated is mounted on the upper side of the stator casing 21. The head cover 50 includes a cover body 54.
And a flat-plate-shaped handle portion 51 integrally formed above the cover body 54 so as to be grasped when the submersible pump is carried, and extending linearly in the horizontal direction. Are arranged in a vertical state so as to be horizontal.

The pump casing 10 has an upper case 12 and a lower case 13 each made of plastic, and the upper case 12 and the lower case 13 can be vertically divided.

A suitable space is formed between the upper case 12 and the bearing bracket 25 fitted on the bottom surface of the stator casing 21 at the axial center around the rotor shaft 23. The part and the peripheral part of the bearing bracket 25 are connected by a bolt 29. Bearing bracket 25 and upper case 1
2, a mechanical seal 27 for sealing around the rotor shaft 23 is attached.

The lower end of the rotor shaft 23 passes through the upper case 12 and enters the inside of the pump casing 10. The impeller 11 is attached to the lower end of the rotor shaft 23 located in the upper case 12.

The upper case 12 has a cylindrical shape covering the periphery of the impeller 11, and has a pump chamber 19 formed therein together with a lower case 13 integrally connected to the upper case 12. The upper case 12 and the lower case 13 are integrally connected by a plurality of bolts and nuts (not shown) with the packing 18 interposed therebetween.

The upper case 12 and the lower case 13 are respectively provided with discharge pipe sections 12a and 13a extending linearly outward from the pump chamber 19, and are provided in the discharge pipe sections 12a and 13a, respectively. A discharge pipe 14 communicating with the pump chamber 19 is formed.

A suction port 15 is formed on the bottom surface of the lower case 13 so as to face the rotor shaft 23, and a plurality of legs 17 for lifting the bottom surface of the lower case 13 are provided at a plurality of positions in the circumferential direction. Is provided.

In the discharge pipe section 12a of the upper case 12,
A discharge port 12b that opens toward the upper surface is provided. The discharge port 12b communicates with the discharge pipe 14 in the discharge pipe section 12a. The connecting pipe 30 is attached via a packing 41 around the discharge port 12b provided in the discharge pipe section 12a.

The connecting pipe 30 is a curved pipe which is bent at substantially 90 degrees, and is attached to the discharge pipe section 12a so that one end face opening faces the discharge port 12b. The end face opening is in a vertical state so as to open toward the side opposite to the motor 20. A flange 31 is provided around the opening end surface in the vertical state.
An engagement portion 31a extending outward and bent downward is formed at the upper end portion of the first member.

The engaging portion 31a is adapted to be engaged with an end of a connecting pipe arranged horizontally on the bottom of the manhole where the submersible pump is installed.

FIG. 2 is a cross-sectional view of the handle 51 of the head cover 50 provided above the motor 20. When carrying the submersible pump by hand, the flat-plate-shaped handle portion 51 is designed so that the hand is not damaged and the pain is not felt, and that it can sufficiently withstand an impact or the like.
It has an appropriate thickness.

A through hole 52 penetrating in the horizontal direction is formed in the center of the handle 50 in the longitudinal direction, and a rubber sleeve 53 for shock absorption is press-fitted in the through hole 52. Mated.

The underwater pump for equipment having such a configuration is used by being disposed in an appropriate manhole when pumping sewage or the like. Fig. 3
As shown in FIG. 4, a shackle 6 is provided in a sleeve 53 of a handle portion 51 provided on an upper portion of the head cover 50.
0 is attached. This shackle 60 uses a round bar
It has a ring portion 61 bent in a letter shape. Ring part 6
One end has a screw hole formed therein, and the other end has a through hole formed therein. Then, a bolt 62 is inserted from a through hole at one end of the ring portion 61 and screwed to a screw hole at the other end.

The shackle 60 has a ring 61 at an end of a chain 71 having an appropriate length, and a ring 61 is engaged with the shackle 60.
Is inserted. The bolt 62 is inserted into the sleeve 53 fitted to the handle 51 and screwed into a screw hole formed at the other end of the shackle 60.

In such a state, with the whole submersible pump for equipment suspended by the chain 71,
It is lowered into the manhole. A guide rail is arranged along the vertical direction on the wall surface of the manhole, and the submersible pump for equipment is lowered along the guide rail.

FIG. 5 is a schematic diagram showing the installation state of the submersible pump in the manhole. In the manhole,
A connection pipe 72 is provided. The connection pipe 72 has one open end surface 72a in a vertical state, and is open to the installation side of the submersible pump. The other open end face 7
2b is bent upward at the end near the opening end surface 72b, and is open upward in a horizontal state.

Flanges 72c and 72d are provided around each of the open end faces 72a and 72b. Above the flange 72c around the vertical open end face 72a disposed on the installation side of the submersible pump, An engaging portion 72e is provided for engaging with an engaging portion 31a provided on the flange 31 of the connecting pipe 30 attached to the submersible pump for the facility. A vertical pipe (not shown) that penetrates through the manhole is connected to the flange 72d of the other open end face 72b of the connecting pipe 72 that is in a horizontal state.

When the equipment submersible pump is suspended by the chain 71 via the shackle 60, the submersible pump is supported at one point at the position of the through hole 52 of the handle 51, and the connecting pipe 30 is connected. Since the center of gravity is biased toward the provided side, the side where the connecting pipe 30 is provided is inclined downward.

In the submersible pump, in such an inclined state, the engaging portion 72e of the connecting pipe 72 arranged in the manhole is opposed to the engaging portion 31a of the connecting pipe 30, and the submersible pump is moved along the guide rail in the manhole. Hanging down. When the submersible pump is in an inclined state in which the side of the connecting pipe 30 is lowered, as shown in FIG.
a extends to the connection pipe 72 side, and the engaging portion 31a is largely opened downward. Therefore, the lowering of the submersible pump causes the flange 31 of the connection pipe 30 to move downward.
Is smoothly engaged with the engaging portion 72e provided on the flange portion 72c of the connection pipe 72.

The engagement part 3 of the connecting pipe 30 in the submersible pump
When 1a and the engaging portion 72e of the connection pipe 72 installed in the manhole are engaged with each other, the submersible pump is lowered. When the submersible pump is further lowered, the engaging portion 31a of the connecting pipe 30 in the submersible pump and the engaging portion 72e of the connecting pipe 72 installed in the manhole are engaged with each other. While holding, the submersible pump is installed in a predetermined vertical posture on the bottom surface of the manhole by sequentially eliminating the inclined state in which the connecting pipe 30 side is down.

When the submersible pump is installed in the manhole in this way, the motor of the submersible pump is driven, and the impeller 11 attached to the lower end of the rotor shaft and disposed in the pump casing 10 is It is rotated integrally with the rotor shaft 23. This allows
The fluid around the pump casing 10 flows from the suction port 15 into the pump chamber 19, passes through the pump chamber 19 as a vortex, and is discharged to the connecting pipe 30 through the discharge path 14 and the discharge port 12b. . Further, the fluid is discharged from the connecting pipe 30 through the connecting pipe 72 to the vertical pipe connected to the connecting pipe 72.

When performing maintenance and inspection of the submersible pump, the entire submersible pump is raised by raising the chain 71. When the submersible pump is pulled up, the submersible pump is in a state in which the central portion of the handle portion 51 is supported at one point with respect to the chain 71, and the side portion on the connecting pipe 30 side is inclined. When the submersible pump is pulled up, the engaging part 31a of the connecting pipe 30 and the engaging part 72e of the connecting pipe 72 in the submersible pump are detached. Thus, each of the engagement portions 31a and 72e
Is released, and the submersible pump is pulled up in the manhole in an inclined state.

As described above, in the submersible pump of this embodiment, the bolt 62 of the shackle 60 is inserted into the sleeve 53 in the through hole 52 that passes through the handle 51 in a horizontal state.
Since the entire submersible pump is suspended, the submersible pump is in an inclined state with the connecting pipe 30 side lowered, and is smoothly attached to and detached from the connecting pipe 72 arranged in the manhole.

A rubber sleeve 5 is provided in the through hole 52.
3 is arranged, so that the bolt 6 of the shackle 60
Even if 2 is suddenly pulled or the submersible pump falls into the manhole, the impact applied to the handle 51 from the bolt 62 is absorbed by the sleeve 53. When the sleeve 53 is removed from the through hole 52, a bolt having an outer diameter substantially equal to the inner diameter of the through hole 52 can be used.
Can be accommodated even if

[0043]

As described above, according to the present invention, a flat handle portion, which can be grasped when being carried and extends linearly in the horizontal direction, is provided above the head cover disposed above the motor. The thickness direction is provided in the vertical direction with the horizontal direction as the horizontal direction, and the through-hole that penetrates the grip portion in the horizontal direction is provided, thereby improving the strength of the grip portion without increasing the thickness of the grip portion. And the chain and the submersible pump can be easily connected by attaching a shackle to the through hole.
In addition, when a sleeve formed of an elastic body such as rubber is fitted in the through hole, the shock applied to the chain or the like is reduced by the sleeve, so that it is possible to reliably prevent the handle from being damaged. it can. On the other hand, by removing the sleeve, a bolt of a large-diameter shackle can be inserted into the through hole, so that the degree of freedom of the shackle that can be used increases.

[Brief description of the drawings]

FIG. 1 is a partially broken front view showing an example of a submersible pump for equipment of the present invention.

FIG. 2 is a cross-sectional view of a handle of the submersible pump for equipment.

FIG. 3 is a front view of a handle showing an installation state of the submersible pump for equipment.

FIG. 4 is a cross-sectional view of the handle shown in FIG. 3;

FIG. 5 is a front view showing one step of an installation state of the submersible pump for equipment of the present invention.

FIG. 6 is a front view showing another process of the installation state of the submersible pump for equipment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Pump casing 11 Impeller 12 Upper case 12a Discharge pipe part 12b Discharge port 13 Lower case 14 Discharge pipe line 15 Suction port 19 Pump room 20 Motor 22 Rotor 23 Rotor shaft 23a Small diameter part 24 Stator 30 Connecting pipe 31 Flange 31a Engagement Part 50 Head cover 51 Handle part 52 Through hole 53 Sleeve

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Katsunori Noda 6-107 Takino-cho, Nishinomiya-shi, Hyogo Shinmei Wa Kogyo Co., Ltd. (56) References U) Real Opening Sho 61-48993 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) F04D 13/08

Claims (2)

(57) [Claims] 1. A submersible pump installed in a pit and rotating an impeller in a pump casing provided in a lower part by a motor arranged in an upper part,
The upper part of the head cover arranged above the motor, can be grasped when carrying, straight line in the horizontal direction
Flat of the handle portion extending Jo is the horizontal direction and the thickness direction
And it provided integrally in a vertical condition, equipment for underwater pump, wherein a through hole penetrating in the horizontal direction to the handle portion. 2. The submersible pump according to claim 1, wherein a sleeve formed of an elastic body is fitted in the through hole.