JP2000205176A - Protecting device for cable in sumberged pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively protect a cable or piping by supporting a cable or piping by a flexible band consisting of a number of frame-like links at the time of connecting the cable or piping extending from the ground part to a submerged pump set in a water suction tank. SOLUTION: A column type submerged pump set in a water suction tank is formed of a column 2 suspended from the top wall of the water suction tank and a submerged pump supported on the lower end of the column 3 and comprising an impeller 7 rotated by a submerged electric motor 5. The lower ends of a power cable 18 and control cable 19 extending to the ground side are connected to the submerged electric motor 5. A lubricating oil feed chamber 20 is provided within the inside guide frame 8 of the submerged pump, and an oil feed piping 21 and oil discharge piping 22 extending from the ground side are connected to the oil feed chamber 20. The cables 18, 19 and the pipings 21, 22 are housed in a flexible band 23 consisting of a number of pivotally supported frame-like links and supported thereby, whereby the cables 18, 19 and the pipings 21, 22 are protected from damage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protection device for cables and the like in a submersible pump installed in a water absorption tank or the like.
In particular, the present invention relates to a protection device for preventing damage to a power cable, a control cable, a lubricating oil pipe, and the like of a column-type submersible pump or a detachable submersible pump detachable from a pumping pipe.

[0002]

2. Description of the Related Art Conventionally, a column-type submersible pump in which a detachable submersible pump is supported at the bottom of a water pump installed in a water absorption tank or the like and power is supplied to the submersible pump at the bottom of the water pump from above the water pump, for example, It is publicly known as described in Japanese Utility Model Publication No. 7-46795. Also, a submersible pump for detachably attaching and detaching the pump from the ground and operating the drive unit from the ground is described in, for example, JP-A-7-269498. So well known.

[0003]

However, in the above-mentioned conventional submersible pump, the power cable, control cable, and lubricating oil pipe connected from the ground to the submersible pump are:
Cables and thin piping covered with a flexible covering material such as rubber.The submersible pump applies excessive force during lifting and suspension for inspection, and the flexible covering material and thin piping are used. Could be damaged by rubbing at the corner of the civil engineering tank. Then, during operation of the submersible pump, the stored water in the tank is agitated, and floating substances such as driftwood may flow to damage the cables and the like. An object of the present invention is to provide an apparatus for protecting a power cable, a control cable, and a lubricating oil pipe of a submersible pump.

[0004]

SUMMARY OF THE INVENTION The gist of the present invention is to provide a submersible pump detachably attached to a water pump installed in a water absorption tank or the like. Are housed in a flexible band formed by rotatably pivoting a number of frame-shaped links to protect cables and the like. Specifically, the link constituting the flexible belt may be connected by a connecting plate having a plurality of through holes in which the left and right link plates are vertically provided, or alternatively, the left and right link plates may be sandwiched by a pair of fixed plates. And
The fixing plate may be partitioned in a lattice shape to form links, and a number of these links may be pivotally connected to form a flexible band. And the above-mentioned submersible pump is a column type submersible pump which is detachable at the lower end of the opened column,
Alternatively, the present invention can also be applied to a submersible pump that is detachable from a stand connected to a pumping pipe.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION In the protection device for cables and the like in a submersible pump according to the present invention, since a power cable, a control cable, and a lubricating oil pipe are housed in a flexible band on which a number of links are pivoted, a cable There is no danger of the pipe being twisted or the cable covering material or the thin pipe for lubrication being rubbed and damaged at the corner of the civil engineering tank. Since the flexible body can freely rotate during lifting and hanging for inspection, no excessive force is applied, and the cable and the lubricating oil pipe are protected by the flexible band. .

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to an embodiment. First, in FIG. 1, reference numeral 1 denotes a column type submersible pump installed in a water absorption tank 2; It comprises a column 3 suspended from a wall and a submersible pump 4 supported on the open lower end of the column 3. The submersible pump 4 will be described in detail. FIG. 2 shows the lower half of the column type submersible pump 1. Reference numeral 5 denotes a submersible motor, and an impeller 7 is fixed to the lower end of a main shaft 6. In addition, the main shaft 6 of the underwater motor 5 is supported at its lower portion by an inner guide frame 8. Reference numeral 9 denotes a funnel-shaped outer guide frame, and the outer guide frame 9 and the inner guide frame 8 are connected by guide vanes 10 to form a flow path. The upper end of the outer guide frame 9 is detachably engaged with an engaging piece 11 provided on the inner peripheral surface of the lower end of the column 3, and is suspended below the column 3. At the lower end of the outer guide frame 9, a retracted suction bell 12 is connected, and the impeller 7 is arranged close to the inner peripheral surface of the suction bell 12. The water sucked from the suction bell 12 is pressurized by the impeller 7, and the pressurized swirling flow is converted into a linear flow by the guide vanes 10 provided in the flow path between the inner guide frame 8 and the outer guide frame 9. It is converted, passes between the column 3 and the underwater motor 5, is pumped to the upper part of the column 3, and is discharged from the discharge pipe 13 shown in FIG.

[0007] Reference numeral 14 denotes a hook provided on the top wall of the underwater motor 5, and the hook 14 is connected to a chain 15 for raising and lowering the submersible pump 4. FIG. 3 shows the upper half of the column type submersible pump 1, and the upper end of the chain 15 is suspended from a latch 16 on the upper inner wall of the column 3. A column lid 17 is provided at the top of the column 3. When the column lid 17 is opened, the submersible pump 4 can be pulled up for inspection. Also, as shown in FIG.
A lower end of a power cable 18 and a control cable 19 covered with rubber are connected to the underwater motor 5, and the upper portions of these cables extend to the ground through the opening of the column cover 17 shown in FIG. The underwater motor 5 can be operated from the ground. As shown in FIG. 2, a lubrication chamber 20 for lubricating the bearings is provided inside the inner guide frame 8.
And an oil drain pipe 22 are connected to each other, and the upper end of the pipe extends to the ground through the opening of the column cover 17 so that lubricating oil can be supplied from the ground.

The power cable 18 and the control cable 19, the oil supply pipe 21 and the oil discharge pipe 22 are bundled and accommodated in a flexible band 23, and the lower end of the flexible band 23 is formed on the top wall of the underwater motor 5. It is hung on a hook 14, and its upper part is hung on a fixture 24 of the column lid 17. When the submersible pump 4 is driven to pump water, the flexible belt 23 protects the cables and pipes from water pressure and floating substances. In addition, the flexible belt 23 protects the cables and thin pipes from being pulled by the lifting and hanging of the submersible pump 4 for inspection so as not to apply an excessive force, and protects from damage caused by being pinched in the corner of the civil engineering tank. I have to do it. Reference numeral 25 denotes an arm for suspending the column 3 from the water absorption tank 2;
Reference numeral 26 denotes a valve provided on the oil supply pipe 21 and the oil discharge pipe 22 respectively.

Next, the flexible belt 23 will be described in detail with reference to FIG. 4. Reference numeral 27 denotes a metal or plastic H-shaped link, and a pair of elongated flat plate-like link plates 28.28. , A link plate 29 connecting the central portions of the left and right link plates 28. The link plates 28 are pivotally connected to adjacent front and rear link plates 28 so as to be freely rotatable. The flexible belt 23 is formed. The connecting plate 29 is provided with a plurality of through holes 30. As shown in FIG. 5, the cables of the power cable 18 and the control cable 19 and the pipes of the oil supply pipe 21 and the oil drain pipe 22 are arranged in front and rear. Each of the connecting plates 29 is inserted into a corresponding one of the through holes 30 and is accommodated in a flexible band 23 including a number of links 27. The locking pieces 31.31 before and after the numerous links 27 are hooked on the hooks 14 on the top wall of the underwater motor 5 and the fixing brackets 24 on the column lid 17, respectively, to twist or pull the cables and pipes. And so on.

A link 27 'shown in FIG. 6 is another embodiment, which is a pair of elongated flat plate-like link plates 28'. 2
8 'are fixed plates 29'. The frame is formed by being sandwiched by 29 '. Fixing plate 29 '. A plurality of partition plates 30 'are provided between 29', and cables and pipes are inserted between them. Symbol 31 '. 31 'are locking pieces provided before and after the multiple links 27. As shown in FIG. 7, the submersible pump 4 is provided so as to be able to move up and down along a guide pipe 32, and is detachably connected to a stand 34 to which a pumping pipe 33 is connected by a chain 15 '. Is stored in the flexible belt 23, so that cables and pipes can be prevented from being damaged by floating substances and from being damaged during lifting and hanging of the submersible pump 4 '.

[0011]

The protection device for cables and the like in the submersible pump according to the present invention does not damage the cables and the like because the cables and pipes of the submersible pump are housed in the flexible belt. That is, in the conventional apparatus of the column type submersible pump or the detachable submersible pump, the power cable, the control cable, and the lubricating oil pipe connected to the submersible pump from the ground are made of a flexible covering material such as rubber or a thin pipe. However, excessive force was applied during lifting / suspending for inspection, and the cables and the like might be damaged by rubbing at the corners of the civil engineering tank. Further, when the submersible pump is operated, there is a possibility that the submersible pump may be damaged by contact with the stirred water flow or suspended matter. According to the present invention, since cables and the like are stored in a flexible band formed by pivotally connecting a number of links, the cables and pipes are twisted, and the covering material and thin pipes are directly rubbed at the corners of the civil engineering tank. Without any risk of damage. Also, since the flexible band composed of a large number of links can freely rotate during lifting / suspending for inspection, no excessive force is applied.

[Brief description of the drawings]

FIG. 1 is a schematic vertical sectional side view of a protection device for cables and the like in a column type submersible pump according to the present invention.

FIG. 2 is a vertical sectional side view showing a lower half of a column to which a submersible pump is attached, of a main part according to the present invention.

FIG. 3 is a vertical sectional side view showing an upper half of a column of a main part according to the present invention.

FIG. 4 is a perspective view of a link constituting the flexible belt according to the present invention.

FIG. 5 is a conceptual diagram of a flexible band accommodating a cable and the like according to the present invention.

FIG. 6 is a perspective view of another embodiment of the link constituting the flexible belt according to the present invention.

FIG. 7 is a side view of a detachable submersible pump according to another embodiment of the present invention.

[Explanation of symbols]

 2 Water absorption tank 3 Column 4.4 'Submersible pump 18.18' Power cable 19.19 'Control cable 21 Oil supply pipe 22 Drainage pipe 23 Flexible band 27.27' Link 28.28 'Link plate 29 Link plate 29' Fixing plate 30 Through hole 30 'Lattice 32 Guide pipe 33 Pumping tube 34 Stand

Claims (5)

[Claims] 1. A submersible pump 4.4 'detachable from a pumping pipe 3.33 installed in the water absorption tank 2 or the like, and a cable 18.1 connected from the ground to the submersible pump 4.4'.
8 '. 19. A submersible pump in which 19.19 'and lubricating oil pipes 21.22 and the like are housed in a flexible band 23 formed by rotatably connecting a number of frame-shaped links 27.27'. Protection device for cables and the like. 2. A link 27 constituting the flexible band 23.
The protection device for a cable or the like in a submersible pump according to claim 1, wherein the right and left link plates (28, 28) are connected by a connection plate (29) having a plurality of through holes (30) vertically provided. 3. A link 27 'constituting the flexible band 23.
Are left and right link plates 28 '. 28 ′ is a pair of fixing plates 29 ′. 29 ', and the fixing plate 29'. 2
The protection device for a cable or the like in a submersible pump according to claim 1, wherein 9 'is partitioned into a lattice 30' shape. 4. The submersible pump according to claim 1, wherein said submersible pump is detachably engaged with an open lower end of the column, and an upper portion of the column is a pumping pipe. Protection device for cables and the like in pumps. 5. The submersible pump 4 ′ is provided with a guide pipe 3
4. The submersible pump according to claim 1, wherein the protection device is provided so as to be able to move up and down along the pipe 2, and is detachably attached to a stand 34 to which the water pipe 33 is connected.