JP2732222B2 - Pump unit lifting device for pull-out type submersible motor pump - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for lifting and lowering a pump unit of a pull-out type submersible motor pump.

[0002]

2. Description of the Related Art In a pull-out type submersible motor pump, a pump unit 12 is suspended from the lower end of a column 10 as shown in FIG. Then, for inspection or the like, the pump unit 12 is
Taken out of The pump unit 12 has an integrated suction bell 14, impeller 16, discharge bowl 18, and submersible motor 20. At the upper end of the pump unit 12, a pump unit lifting ring 22 is provided. One end of a chain 24 is connected to the ring 22, and the other end is hooked on a crane hook, so that the pump unit 12 is lifted and lifted. It is.

[0003]

In the conventional pull-out type submersible motor shown in FIG. 5, the chain 24 for lifting and lowering the pump unit 12 is not removed, and the chain 24 is not removed. Column 10
Remains inside. This means that the connection and disconnection of the pump unit lifting ring 22 and the chain 24
This is because it cannot be performed freely in the interior. Therefore,
The chain 24 vibrates with the operation of the pump, and comes into contact with the power cable 26 connected to the submersible motor 20 to damage the power cable 26, which may make the operation of the pump impossible. Also,
There is also a risk of generating noise. The problem is described in Column 1.
This is more likely to occur as 0 becomes longer and the chain 24 becomes longer.
Further, in order to lift the pump unit 12 from the column 10 using the chain 24, a height of the total length of the chain 24 and the pump unit 12 from the upper end of the column 10 is required. Therefore, the ceiling of the pump room needs to be sufficiently high, and the construction cost increases accordingly. If the height to the ceiling is not enough, lift it with a crane to a certain extent, and then hang another crane on the middle or lower end of the lifted chain to further lift the work. Although they can be performed, these operations are extremely complicated.

The present invention has been made in view of the circumstances of the prior art, and is directed to a pull-out type submersible motor pump that can be freely connected to and separated from a pump unit lifting ring in a column and does not need to be lifted and lowered by a chain. An object of the present invention is to provide a pump unit lifting device.

[0005]

In order to achieve the above object, a pump unit lifting device for a pull-out type submersible motor pump according to the present invention comprises a frame, a plurality of rollers capable of rolling on the inner peripheral surface of a column. The frame is provided with a swing support shaft orthogonal to the shaft, and a hook is hung on the swing support shaft at the center of the column so as to be swingable. The lower end of the hook is lifted down to abut on the pump unit lifting ring, and the pump unit lifting ring is formed as a first inclined side so that the hook is inclined toward the opening of the hook engaging portion. By hanging down the side obliquely upward from the part, the pump unit lifting ring in the hook engaging part comes into contact with the pump unit lifting ring, and the pump unit lifting ring comes off the hook engaging part. The second inclined side and without tilting urchin said hook, said hook provided locking means for regulating the return when inclined at a predetermined angle, and is configured by providing a frame lifting ring at the top of the frame.

[0006] The locking means may comprise a notch recess provided at the top of the hook, and a stopper which engages with the notch recess when the hook is inclined to a predetermined angle.

[0007] The frame body may be provided with a regulating means for regulating the swing of the hook from the suspended state to the side opposite to the inclination of the hook by the first inclined side. .

Further, the frame may be provided with an indicating means for indicating a swinging surface of the hook when viewed from above.

[0009]

[Work] Hang the pump unit lifting ring on the hook engaging part, hook the crane hook on the frame lifting ring, suspend the pump unit in the column, and further move the crane hook from the state where the pump unit reaches the lower end of the column. Is lowered, the pump unit lifting ring abuts on the second inclined side to tilt the hook, and when the hook is tilted to a predetermined angle, the return is regulated by the locking means. In this state, the pump unit lifting ring is disengaged from the hook engaging portion. Therefore, if the crane hook is lifted, the pump unit is left at the lower end of the column, and the device of the present invention is lifted together with the crane hook.

When the apparatus of the present invention is suspended, the first inclined side first contacts the pump unit lifting ring, and the hook is inclined. When the crane hook is further lowered, the pump unit lifting ring faces the hook engaging portion, and the hook returns to the suspended state due to the pendulum phenomenon. Here, when the crane hook is lifted, the pump unit lifting ring is hooked on the hook engaging portion, and the pump unit is lifted together with the device of the present invention.

[0011] If the locking means is constituted by the notched concave portion and the stopper, the locking means can be formed with an extremely simple structure.

Further, if a regulating means for regulating the inclination of the hook to the opposite side is provided, the hook may swing unnecessarily when the apparatus of the present invention is suspended in the column in order to suspend the pump unit. Therefore, the first inclined side is reliably brought into contact with the pump unit lifting ring.

Further, if indicator means for indicating the swinging surface of the hook is provided, it is determined whether the hook is substantially perpendicular to the pump unit lifting ring by looking down from the upper end of the column when the apparatus of the present invention is suspended. I can do it.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a longitudinal sectional view of a pump unit lifting device of the pull-out type submersible motor pump of the present invention, FIG. 2 is a plan view, and FIG. 3 shows the operation of the device of the present invention when the pump unit is lowered. FIG. 4 is a diagram illustrating the operation of the device of the present invention when the pump unit is lifted. In order to facilitate understanding of the structure, the longitudinal sectional view shown in FIG. 1 does not accurately show the section of the device of the present invention whose plan view is shown in FIG.

On the outer peripheral surface of the cylindrical body 30, rollers 32, 32... Rolling on the inner peripheral surface of the column 10 are provided by roller arms 34, 34. It is formed movably in the axial direction without a large play inside. Further, inside the cylindrical body 30, an oscillating support shaft 38 orthogonal to the axial direction is provided at the center by an appropriate support member 36, 36.

Further, a hook 40 is suspended on the pivot 38 so as to be pivotable. The lower end side of the hook 40 is formed with a first inclined side 40b that inclines the hook 40 so that the pump unit lifting ring 22 comes into contact with the lowering side so that the pump unit lifting ring 22 is on the opening side of the hook engaging portion 40a. You. Further, the hook 40 is lifted such that the pump unit lifting ring 22 in the hook engaging portion 40a comes into contact with the diagonally upper side from the hook engaging portion 40a and the pump unit lifting ring 22 is released from the hook engaging portion 40a. A second inclined side 40c to be inclined is formed. The inclination by the second inclined side 40c is set to be larger than the inclination of the hook 40 by the first inclined side 40b. In addition, a notch recess 40 d is formed on the top side of the hook 40. A stopper 44 is swingably provided by a swing shaft 42 parallel to the swing support shaft 38, and the tip of the stopper 44 abuts on the top of the hook 40,
Moreover, when the hook 40 is inclined at a predetermined angle, the notch recess 4 is formed.
The tip is engaged with Od to restrict the movement of the hook 40 in the return direction. The stopper 44 may be brought into contact with the top surface of the hook 40 by its own weight, but it is preferable that the stopper 44 be appropriately elastically contacted with a spring or the like.

The support members 36, 36... Are provided with a regulating member 46 for regulating the swing of the hook 40 from the suspended position to the side opposite to the side inclined by the first inclined side 40b. Further, a frame lifting ring 48 on which the crane hook 60 is hung is provided at the upper end of the cylindrical body 30. Then, protruding members 50, 50 parallel to the swing support shaft 38 are provided on the outer periphery of the cylindrical body 30 so as to be visible from above. A frame is formed by the cylindrical body 30 and the support members 36, 36.

The operation of the device of the present invention in such a configuration is as follows.
It is as follows.

First, the suspension operation of the pump unit 12 will be described with reference to FIG. The pump unit lifting ring 22 of the pump unit 12 has the hook 4
The hook unit 40 is hooked on the hook engaging portion 40a, the crane hook 60 is hooked on the frame lifting ring 48 of the apparatus of the present invention, and the pump unit 12 is suspended in the column 10 as shown in FIG. And the crane hook 60
When the lowering of the pump unit 12 reaches the lower end of the column 10 and the lowering of the pump unit 12 is stopped,
The device of the present invention is lowered relative to the pump unit 12, and as shown in FIG. 3B, the pump unit lifting ring 22 abuts on the second inclined side 40c of the hook 40 to swing the hook 40 rightward in the figure. Move and tilt. When the crane hook 60 is further lowered, as shown in FIG. 3C, the inclination of the hook 40 becomes large.
As shown in (d), when the hook 40 is inclined by a predetermined angle, the tip of the stopper 44 is inserted into and engaged with the cutout recess 40d on the top side of the hook 40. The movement of the hook 40 in the return direction (swing to the left in the drawing) is restricted by the stopper 44, and the inclination at a predetermined angle is maintained. In this state,
The pump unit lifting ring 22 has a hook engaging portion 40.
a. Therefore, if the crane hook 60 is lifted, the apparatus of the present invention is lifted together with the crane hook 60, but the pump unit 12 is left at the lower end of the column 10.

Next, the lifting operation of the pump unit 12 will be described with reference to FIG. The crane hook 60 is hung on the frame lifting ring 48 of the apparatus of the present invention, and the apparatus of the present invention is suspended in the column 10. The hook 40 is in a suspended state. As shown in FIG. 4 (a), the pump unit lifting ring 22
Abuts on the first inclined side 40b of the hook 40, and the hook 40 swings to the right in the figure as shown in FIG. When the pump unit lifting ring 22 comes into contact with the hook 40, the swing of the hook 40 is regulated by the regulating member 46, and the swing surface of the hook 40 is viewed from the upper end of the column 10 through the projection members 50, 50. The hook 40 can be securely engaged with the pump unit lifting ring 22 as described later by adjusting and suspending the pump unit lifting ring 22 so as to be orthogonal to the pump unit lifting ring 22 while checking the direction.

When the crane hook 60 is further lowered, the pump unit lifting ring 22 shown in FIG. 4D is brought into a position facing the opening of the hook engaging portion 40a through the state shown in FIG. 4C. Then, since the hook 40 is swung to the right in the figure and tilted, it swings in the return direction to the left in the figure as a pendulum by its own weight, and the pump unit lifting ring 22 is positioned in the hook engaging portion 40a. . When the crane hook 60 is lifted, the pump unit lifting ring 22 is hung on the hook engaging portion 40a, and the pump unit 12 is also lifted in the column 10 with the lifting of the crane hook 60.

Therefore, the apparatus of the present invention can be used to lift and lower the pump unit 12 when the column 10 is lifted.
It can be freely connected to and separated from the pump unit lifting ring 22 inside. For this reason, during the operation of the pump, it is lifted from the column 10 and removed. Therefore, a chain 2 for lifting and lowering the pump unit 12 like a conventional device of this type is used.
4 is unnecessary, and the power cable 26 is not damaged. Also, no noise is generated by the vibration of the chain 24.

Since the chain 24 and the like are not used, the pump unit 12 can be lifted from the column 10 only by the height of the total length of the apparatus of the present invention and the pump unit 12 from the upper end of the column 10. Room ceilings are low and construction costs are low. In addition, the work can be sufficiently performed without using a plurality of cranes, and the work is simple accordingly.

In the pump unit lifting apparatus of the pull-out type submersible motor pump according to the present invention, the structure of the frame is not limited to that of the above-described embodiment, and the swing support shaft 38 is provided. Any structure may be used as long as it can move smoothly. Further, the regulating member 46 as the regulating means is not limited to the above embodiment, and may be omitted. The protruding members 50, 50 as indicating means may have any structure as long as it can be visually recognized from above whether or not the hook 40 is in a position capable of engaging with the pump unit lifting ring 22, and may be provided at the upper end of the frame. An appropriate mark or the like may be provided.

[0025]

As is apparent from the above description, the pump unit lifting apparatus of the pull-out type submersible motor pump according to the present invention has the following special effects.

In the pump unit lifting device of the pull-out type submersible motor pump according to the first aspect, when the pump unit is lifted and lowered, the hook is engaged with the pump unit lifting ring when the pump unit reaches the lower end of the column. Then, only the device of the present invention can be lifted. When the pump unit is lifted, the hook is engaged with the pump unit lifting ring when the device of the present invention is lifted and lowered, so that the pump unit can be lifted together with the device of the present invention. Therefore, unlike a conventional device of this type, a chain or the like for lifting and lowering is not required, and the chain does not generate noise or damage the power cable.
Moreover, to lift the pump unit from the column,
The height from the upper end of the column is lower than that of the conventional one, so that the construction cost of the pump room can be reduced accordingly, and the whole equipment can be made inexpensive. Further, the lifting and lowering operation is performed by one crane, and the operation is relatively simple.

According to a second aspect of the present invention, there is provided a pump unit lifting device for a pull-out type submersible motor pump, wherein the hook is inclined at a predetermined angle to hold the hook in order to remove the pump unit lifting ring from the hook engaging portion. Is formed by the notched concave portion and the stopper, so that the configuration can be made extremely simple.

Further, in the pump unit lifting device of the pull-out type submersible motor pump according to claim 3,
Since the swing of the hook is regulated by the regulating means, when the device of the present invention is suspended and the hook is engaged with the pump unit lifting ring, the first inclined side can be securely brought into contact with the hook, and the hook can be fixed to a predetermined position. By inclining in the direction, the hook can be securely engaged.

Further, in the pump unit lifting device of the pull-out type submersible motor pump according to the fourth aspect, the swinging surface of the hook can be visually recognized from above the column by the indicating means, and the posture of the device can be changed. By properly adjusting the hook to be in a posture substantially perpendicular to the pump unit lifting ring, reliable hook engagement can be achieved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a pump unit lifting device of a pull-out type submersible motor pump of the present invention.

FIG. 2 is a plan view.

FIG. 3 is a diagram for explaining the operation of the device of the present invention when the pump unit is suspended.

FIG. 4 is a view for explaining the operation of the apparatus of the present invention when the pump unit is lifted.

FIG. 5 is a diagram showing an example of a conventional pump unit lifting device of a pull-out type submersible motor pump.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Column 12 Pump unit 22 Pump unit lifting ring 30 Cylindrical body 32 Roller 36 Supporting member 38 Swing support shaft 40 Hook 40a Hook engagement part 40b First inclined side 40c Second inclined side 40d Notch recess 42 Swing axis 44 Stopper 46 regulating member 48 frame lifting ring 50 projecting member 60 crane hook

Claims (4)

(57) [Claims] 1. A frame is provided with a plurality of rollers capable of rolling on an inner peripheral surface of a column so as to be movable in an axial direction in the column. A swing support shaft orthogonal to the axis is provided on the frame. A hook is swingably suspended at the center of the column on the swing support shaft, and the lower end side of the hook is hung down to abut the pump unit lifting ring so that the pump unit lifting ring engages with the hook. A first inclined side for inclining the hook so as to be on the opening side of the portion, and a slanting upper side is suspended from the hook engaging portion so as to abut against the pump unit lifting ring in the hook engaging portion. A second inclined side for inclining the hook so that the pump unit lifting ring is disengaged from the hook engaging portion; a locking means for restricting return when the hook is inclined by a predetermined angle; A pump unit lifting device for a pull-out type submersible motor pump, wherein a frame lifting ring is provided on an upper portion. 2. A pump unit lifting device for a pull-out type submersible motor pump according to claim 1, wherein said locking means includes a notch recess provided on a top side of said hook;
A pump unit lifting apparatus for a pull-out type submersible motor pump, comprising a stopper that engages with the notch recess when the hook is inclined to a predetermined angle. 3. The pump unit lifting device for a pull-out type submersible motor pump according to claim 1, wherein the frame has a side opposite to an inclination of the hook due to the first inclined side from a posture in which the hook is suspended. A pump unit lifting device for a pull-out type submersible motor pump, comprising a restricting means for restricting swinging of the pump unit. 4. The pump unit lifting device for a pull-out type submersible motor pump according to claim 1, wherein said frame body is provided with indicating means for indicating a swinging surface of said hook when viewed from above. Pump unit lifting device for submersible motor pumps.