JP3534301B2 - Protection device for cables etc. in submersible pumps - Google Patents

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 a cable in a submersible pump installed in a water absorption tank,
In particular, the present invention relates to a protective device for preventing damage to a power cable, a control cable, a lubricating oil pipe, etc. of a column-type submersible pump or a detachable submersible pump that is detachably attached to a pumping pipe.

[0002]

2. Description of the Related Art Conventionally, a column-type submersible pump, in which a removable submersible pump is supported on the bottom of a pumping pipe installed in a water absorption tank or the like, and which supplies power to the submersible pump at the bottom of the pumping pipe from above the pumping pipe, is, for example, It is publicly known as described in Japanese Utility Model Publication No. 7-46795. Further, a submersible pump in which a discharge port of a submersible pump that can be raised and lowered is detachably attached to a connection port of a pumping pipe and a pump is attached and detached from the ground and a driving machine is operated is also described in, for example, Japanese Patent Laid-Open No. 7-269498. As well known.

[0003]

However, in the above conventional submersible pump, the power cable, the control cable and the lubricating oil pipe connected to the submersible pump from the ground are
Cables and thin pipes covered with a flexible covering material such as rubber.Underwater pumps use unreasonable force during hoisting / hanging for inspection, and flexible covering materials and thin piping. Could be rubbed and damaged at the corner of the civil tank. The stored water in the tank may be agitated during the operation of the submersible pump, and floating materials such as driftwood may flow to damage the cables and the like. An object of the present invention is to provide a device 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 which can be freely attached to and detached from a pumping pipe installed in a water absorption tank or the like. Is housed in a flexible band formed by pivotally pivoting a large number of frame-shaped links to protect cables and the like. Specifically, the links forming the flexible band 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 by sandwiching the left and right link plates by a pair of fixing plates. Then
This fixing plate may be divided into a grid to form links, and a large number of these links may be pivotally attached to form a flexible band. And, the submersible pump is a column type submersible pump which is detachably attached to the lower end of the opened column.
Alternatively, it can be applied to a submersible pump that is detachably attached to a stand to which a pumping pipe is connected.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION A protection device for a cable or the like in a submersible pump according to the present invention has a power cable, a control cable, and a lubricating oil pipe housed in a flexible band having a number of links pivotally attached thereto. There is no risk of the pipes being twisted, and the cable covering material and thin pipes for lubrication being rubbed at the corners of the civil engineering tank and damaged. Also, since the flexible body can freely rotate even during hoisting / hanging for inspection, no unreasonable 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 based on embodiments. First, in FIG. 1, reference numeral 1 is a column type submersible pump installed in a water absorption tank 2, and the column type submersible pump 1 is a ceiling of the water absorption tank 2. It is composed of a column 3 that hangs from a wall and a submersible pump 4 that is supported at 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 is an underwater electric motor, and an impeller 7 is attached to the lower end of a main shaft 6 thereof. The main shaft 6 of the submersible motor 5 is pivotally supported by the inner guide frame 8 at its lower portion. Reference numeral 9 is 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 locked to 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. A suction bell 12 that has been contracted is connected to the lower end of the outer guide frame 9, and an impeller 7 is disposed close to the inner peripheral surface of the suction bell 12. Then, 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.

Reference numeral 14 is a hook provided on the top wall of the underwater electric motor 5, and a chain 15 for raising and lowering the submersible pump 4 is connected to the hook 14. 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 hook 16 on the inner wall of the column 3. A column lid 17 is provided on the top of the column 3, and when the column lid 17 is opened, the submersible pump 4 can be pulled up for inspection. Also, as shown in FIG.
The underwater electric motor 5 is connected to the lower ends of the power cable 18 and the control cable 19 covered with rubber, and the upper portions of these cables are extended to the ground through the opening of the column lid 17 shown in FIG. The underwater electric motor 5 can be operated from the ground. Further, as shown in FIG. 2, an oil supply chamber 20 for lubricating the bearing is provided inside the inner guide frame 8, and an oil supply pipe 21 made of a thin copper pipe is provided in the oil supply chamber 20.
And an oil drain pipe 22 are connected, and the upper end of this pipe extends through the opening of the column lid 17 to the ground so that the lubricating oil can be supplied from the ground.

The power cable 18, the control cable 19, the oil supply pipe 21, and the oil discharge pipe 22 are bundled and housed in a flexible band 23, and the lower end of the flexible band 23 is the top wall of the underwater electric motor 5. It is hooked on the hook 14, and its upper part is suspended by the fixing metal fitting 24 of the column lid 17. The flexible belt 23 protects the cables and pipes from water pressure and floating matter when the submersible pump 4 is driven to pump water. In addition, the flexible band 23 protects the cable and thin pipes from being lifted / hanged by the submersible pump 4 for inspection so as not to apply an unreasonable force to them, and protects them from being damaged by being caught at the corner of the civil engineering tank. I am doing it. Incidentally, reference numeral 25 is an arm for suspending the column 3 in the water absorption tank 2,
Reference numeral 26 is a valve provided in each of the oil supply pipe 21 and the oil discharge pipe 22.

Next, the flexible band 23 will be described in detail with reference to FIG. 4. Reference numeral 27 is a metal or plastic H-shaped link, and a pair of elongated flat plate-shaped link plates 28.28. , A linking plate 29 that links the central portions of the left and right link plates 28, and the link plates 28 are pivotally attached to the adjacent front and rear link plates 28. The flexible band 23 is configured. A plurality of through holes 30 ... Are provided in the connecting plate 29, and 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 at the front and rear. It is inserted into each through hole 30 of the connecting plate 29 and is accommodated in the flexible band 23 including a large number of links 27. The locking pieces 31.31 before and after the many links 27 are hooked on the hooks 14 on the ceiling wall of the underwater electric motor 5 and the fixing fittings 24 of the column lid 17, respectively, and the cables and pipes are twisted or pulled. I try not to apply unreasonable power such as.

The link 27 'shown in FIG. 6 is another embodiment, which is a pair of elongated flat plate-like link plates 28'. Two
8'is a fixing plate 29 '. It is sandwiched by 29 'to form a frame. Fixed plate 29 '. A plurality of partition plates 30 '... Are provided between 29', and cables and pipes are inserted between them. Reference numeral 31 '. Reference numeral 31 'is a locking piece provided before and after the many links 27 ... As shown in FIG. 7, the submersible pump 4 is arranged so as to be vertically movable along a guide pipe 32, and a cable or the like of the submersible pump 4'which is detachably attached to a stand 34 to which a pumping pipe 33 is connected by a chain 15 '. If the cable is housed in the flexible band 23, the cables and the pipes can be prevented from being damaged by floating substances and from being damaged when the submersible pump 4'is lifted or hung.

[0011]

As described above, the cable protection device for a submersible pump according to the present invention does not damage the submersible pump cables and piping because they are housed in a flexible band. That is, in the conventional device of the column type submersible pump or the detachable submersible pump, in the power cable, the control cable and the lubricating oil pipe connected to the submersible pump from the ground, the flexible coating material such as rubber or the thin pipe is used. There was a risk that excessive force would be applied during lifting and hanging for inspection, rubbing at the corner of the civil engineering tank and damaging the cables. Further, when the submersible pump is in operation, there is a risk of damage due to contact with agitated water flow or floating matter. In this invention, since the cables and the like are housed in the flexible band formed by pivotally connecting a large number of links, the cables and the piping are twisted, and the covering material and the thin piping are rubbed directly at the corners of the civil engineering tank. There is no damage and there is no fear of damage. Further, since the flexible band composed of a large number of links can be freely rotated even during the lifting / suspending for inspection, no unreasonable force is applied.

[Brief description of drawings]

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

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

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

FIG. 4 is a perspective view of a link that constitutes a flexible band 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 forming the flexible band 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 columns 4.4 'Submersible pump 18.18 'power cable 19.19 'control cable 21 Oil supply piping 22 Oil drain pipe 23 Flexible band 27.27 'link 28.28 'link plate 29 Connection plate 29 'fixed plate 30 through holes 30 'lattice 32 Guide pipe 33 Pumping pipe 34 stand

Claims (5)

(57) [Claims] 1. A submersible pump 4.4 'which is detachably attached to a pumping pipe 3.33 installed in a water absorption tank 2 or the like, and a cable 18.1 which is connected to the submersible pump 4.4' from a ground portion.
8 '. A submersible pump characterized in that a 19.19 ', a lubricating oil pipe 21.22, etc. are housed in a flexible band 23 constituted by pivotally connecting a large number of frame-shaped links 27.27'. Protection device for cables, etc. 2. A link 27 constituting the flexible band 23.
2. The protective device for a cable in a submersible pump according to claim 1, wherein the left and right link plates 28.28 are connected by a connecting plate 29 having a plurality of through holes 30. 3. A link 27 'constituting the flexible band 23.
However, the left and right link plates 28 '. 28 'to a pair of fixing plates 29'. 29 ', and fixed plate 29'. Two
9. A protection device for a cable or the like in a submersible pump according to claim 1, wherein 9'is divided into a grid 30 '. 4. The submersible pump according to claim 1, wherein the submersible pump 4 is detachably engaged with the lower end of the opened column 3, and the upper portion of the column 3 serves as a pumping pipe. A protection device for cables in pumps. 5. The submersible pump 4 ′ comprises a guide pipe 3
2. A device for protecting a cable or the like in a submersible pump according to claim 1, wherein the device is detachably attached to a stand 34 to which a pumping pipe 33 is connected.