CN214412251U

CN214412251U - Cable connection structure of submersible deep well pump of hydropower station

Info

Publication number: CN214412251U
Application number: CN202120579572.5U
Authority: CN
Inventors: 杨忠; 刘海波; 唐林; 张官祥; 陈楠; 李忠耀; 张俊
Original assignee: China Yangtze Power Co Ltd
Current assignee: China Yangtze Power Co Ltd
Priority date: 2021-03-22
Filing date: 2021-03-22
Publication date: 2021-10-15
Anticipated expiration: 2031-03-22

Abstract

A cable connection structure of a submersible deep well pump in a hydropower station comprises an insulation protective pipe, a sealing device and a fixing device, wherein the fixing device comprises an upper shell and a lower shell, the left side and the right side of the upper shell are respectively provided with an upper positioning groove, the left side and the right side of the lower shell are respectively provided with a lower positioning groove corresponding to the upper positioning groove, the upper positioning groove and the lower positioning groove are matched to form an opening for the insulation protective pipe to pass through, the side wall of the fixing device is penetrated with a connecting rod, the bottom end of the connecting rod is fixedly connected with a fixing plate, the bottom surface of the fixing plate is slidably connected with the insulation protective pipe, the top end of the connecting rod is fixedly connected with a movable plate, the bottom of the movable plate is fixedly connected with a spring, the spring is fixedly connected with the side wall of the fixing device, the top of the movable plate is fixedly provided with a fixing bracket, the bottom of the movable bracket is movably penetrated on the side wall of the fixing device, the top of the movable bracket is provided with a fastening bolt, and the fixing device are in threaded connection, two ends of the insulation protection tube are respectively connected with a sealing device.

Description

Cable connection structure of submersible deep well pump of hydropower station

Technical Field

The utility model belongs to the technical field of the cable, concretely relates to power station dive deep-well pump cable junction structure.

Background

At present, the height difference from a leakage water collecting well platform to a drainage pump house of an underground hydropower station generally ranges from dozens of meters to one hundred meters, submersible deep well pump motors are provided with submersible cables, but the length is limited, and the submersible deep well pump motors are laid in a cable hanging mode from the water collecting well platform to an electric panel cabinet in consideration of the limitation of cable laying space. The cable of the motor is connected with the suspended cable through a cable intermediate joint arranged in the area of the water collecting well platform and then connected to the electric cabinet of the drainage pump room. The cable is an important component of a power supply system of a drainage pumping station, and the safety of the cable is related to the safe and stable operation of the whole drainage system and even a power station.

At present, the intermediate joint of the cable is usually insulated only by adopting an insulating and heat-shrinkable wrapping mode, and the intermediate joint forms a large bulge to cause poor insulating and heat-shrinkable effects and influence the waterproof performance and the insulating performance of the intermediate joint, so that the intermediate joint is the weakest part on the whole cable, and the cable is frequently broken down and appears on the intermediate joint of the cable. The height of the seepage collecting well of the underground hydropower station is usually the lowest part of the hydropower station, all the seepage water of the hydropower station is gathered at the position, the environment is very humid, and even under special working conditions, the water level of the collecting well overflows a steel grating of a collecting well platform to submerge a cable switching device, so that the cable switching device with stronger electrical insulation performance, waterproof performance and corrosion resistance performance is needed.

Disclosure of Invention

The utility model provides a power station dive deep-well pump cable junction structure has that processing cycle is short, insulating properties is strong, sealing performance is good characteristics to promote the quality of cable product to a certain extent, reduce later stage maintenance cost.

In order to achieve the above object, the present invention provides the following technical solutions:

a cable connection structure of a submersible deep well pump in a hydropower station comprises an insulation protective pipe, a sealing device and a fixing device, wherein the fixing device comprises an upper shell and a lower shell, the left side and the right side of the upper shell are respectively provided with an upper positioning groove, the left side and the right side of the lower shell are respectively provided with a lower positioning groove corresponding to the upper positioning groove, the upper positioning groove and the lower positioning groove are matched to form an opening for the insulation protective pipe to pass through, the upper side wall and the lower side wall of the fixing device are respectively penetrated with a connecting rod, the bottom end of the connecting rod is fixedly connected with a fixing plate, the bottom surface of the fixing plate is slidably connected with a first cable, one side of the first cable is connected with a second cable, the second cable is slidably connected with the bottom of the fixing plate, the top end of the connecting rod is fixedly connected with a movable plate, the bottom of the movable plate is fixedly provided with a spring, the lower end of the spring is fixedly connected with the fixing device, the top of the movable support is movably penetrated on the side wall of the fixing device, the top of the movable support is provided with a fastening bolt, the fastening bolt is in threaded connection with the movable support and the fixing device, openings on two sides of the fixing device are connected with insulating protective pipes, and one end of each insulating protective pipe is connected with a sealing device.

Preferably, the insulation protection pipe comprises an inner layer and an outer layer, wherein the outer layer is a stainless steel layer, and the inner layer is a PVC insulation layer.

Preferably, the sealing device comprises a sealing cover, a first flange and a sealing gasket, the sealing cover is fixedly connected with the first flange, one end of the insulating protective pipe is connected with a second flange, the first flange is fixedly connected with the second flange through bolts, and the sealing gasket is connected between the first flange and the second flange.

Preferably, the bottom surface of the fixing plate is fixedly connected with an insulating rubber mat, and the insulating rubber mat is provided with anti-skid lines.

Preferably, a first sealing ring is fixedly arranged on the outer side of the movable support, and the bottom of the first sealing ring is fixedly connected with the fixing device.

Preferably, a second sealing ring is fixedly arranged at an opening on the fixing device, and the bottom of the second sealing ring is fixedly connected with the fixing device.

Preferably, the connecting plates are arranged on two sides of the upper shell and two sides of the lower shell, and the upper shell and the lower shell are fixedly connected through bolts.

Preferably, a first cable and a second cable are arranged in the insulation protection pipe and connected through a copper bar.

The utility model has the advantages that:

1. the utility model discloses simple structure, convenient operation can fix wire and cable through fixed plate, movable support and fly leaf isotructure, has not only strengthened the electrical insulation performance of cable through setting up the insulating rubber mat that has anti-skidding line, can also prevent that wire and cable from sliding, and the wire and cable's of being convenient for is fixed, can improve whole device leakproofness through setting up the second class structure of sealing washer one and sealing washer, prevents that water from getting into the junction of cable, improves the security of using wire and cable.

2. Through setting up sealing device, sealed lid and seal gasket pass through the flange and are connected with the insulation protection pipe, can seal the insulation protection pipe, have further strengthened the leakproofness of whole device.

3. Through setting up constant head tank, lower constant head tank, played the positioning action to the insulation protection pipe, effectually prevented that insulation protection pipe from rocking in fixing device.

Drawings

FIG. 1 is a schematic view of the mating of an upper housing and a lower housing;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a schematic side view of the present invention;

FIG. 4 is an enlarged view of portion A;

FIG. 5 is a schematic structural view of an insulation protection tube;

FIG. 6 is a schematic view of a cable connection;

in the figure, an insulating protection tube 1, a stainless steel layer 11, a PVC insulating layer 12, a sealing device 2, a sealing cover 21, a first flange 22, a sealing gasket 23, a fixing device 3, an upper shell 31, an upper positioning groove 311, a lower shell 32, a lower positioning groove 321, a connecting rod 4, a fixing plate 5, a first cable 6, a second cable 7, a movable plate 8, a movable support 9, a fastening bolt 10, a second flange 13, a connecting plate 14, an insulating rubber gasket 15, a first sealing ring 16, a second sealing ring 17 and a spring 18.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

As shown in fig. 1 to 5, a cable connection structure for a submersible deep well pump in a hydropower station comprises an insulation protection pipe 1, a sealing device 2 and a fixing device 3, wherein the fixing device 1 comprises an upper shell 31 and a lower shell 32, upper positioning grooves 311 are respectively arranged on the left and right sides of the upper shell 31, lower positioning grooves 321 corresponding to the upper positioning grooves 311 are respectively arranged on the left and right sides of the lower shell 32, the upper positioning grooves 311 and the lower positioning grooves 321 are matched to form an opening for the insulation protection pipe 1 to pass through, connecting rods 4 are arranged on the upper and lower side walls of the fixing device 3 in a penetrating manner, a fixing plate 5 is fixedly connected to the bottom ends of the connecting rods 4, a first cable 6 is slidably connected to the bottom surface of the fixing plate 5, a second cable 7 is connected to one side of the first cable 6, the second cable 7 is slidably connected to the bottom of the fixing plate 5, a movable plate 8 is fixedly connected to the top end of the connecting rods 4, a spring 18 is fixedly arranged at the bottom of the movable plate 8, and the lower end of the spring 18 is fixedly connected to the fixing device 3, the top of the movable plate 8 is provided with a movable support 9, the bottom of the movable support 9 is movably arranged on the side wall of the fixing device 3 in a penetrating manner, the top of the movable support 9 is provided with a fastening bolt 10, the fastening bolt 10 is in threaded connection with the movable support 9 and the fixing device 3, openings on two sides of the fixing device 3 are connected with insulating protective tubes 1, and one ends of the insulating protective tubes 1 are connected with sealing devices 2.

Through fixed plate 5, wire and cable can be fixed to movable support 9 and fly leaf 8 isotructure, not only strengthened the electric insulation performance of cable through setting up insulating rubber mat 15 that has anti-skidding line, can also prevent that wire and cable from sliding, be convenient for wire and cable's is fixed, before tightening fastening bolt 10, because the effect of spring 18, make fly leaf 8 and movable support 9 propped up, fixed plate 5 surface and cable interval, tighten fastening bolt 10, make movable support 9 remove to fixing device 3, movable support 9 pushes down fly leaf 8 gradually, spring 18 is compressed, fly leaf 8 moves down, and then drive connecting rod 4 and move down, and then drive fixed plate 5 and move down, the bottom surface and the cable surface of fixed plate 5 are tightly laminated at last, thereby make the cable fixed.

Further, insulating protective tube 1 includes inlayer and skin, and the skin is stainless steel layer 11, and the inlayer is PVC insulating layer 12, sets up like this, and outer stainless steel layer 11 can increase insulating protective tube 1's compressive property and mechanical properties, and inlayer PVC insulating layer 12 can increase the insulating properties of cable.

Furthermore, the sealing device 2 comprises a sealing cover 21, a first flange 22 and a sealing gasket 23, the sealing cover 21 is fixedly connected with the first flange 22, one end of the insulating protection pipe 1 is connected with a second flange 13, the first flange 22 is fixedly connected with the second flange 13 through a bolt, the sealing gasket 23 is connected between the first flange 22 and the second flange 13, the sealing cover 21 and the sealing gasket 23 are connected with the insulating protection pipe 1 through the flange, the insulating protection pipe 1 can be sealed, and the sealing performance of the whole device is enhanced.

Further, the bottom surface of the fixing plate 5 is fixedly connected with an insulating rubber mat 15, anti-slip lines are arranged on the insulating rubber mat 15, the electric insulation performance of the cable is enhanced through the insulating rubber mat 15 with the anti-slip lines, the wire and cable can be prevented from sliding, and the wire and cable can be fixed conveniently.

Further, a first sealing ring 16 is fixedly arranged on the outer side of the movable support 9, and the bottom of the first sealing ring 16 is fixedly connected with the fixing device 3.

Further, the opening on the fixing device 3 is fixedly provided with a second sealing ring 17, the bottom of the second sealing ring 17 is fixedly connected with the side wall of the fixing device 3, the sealing performance of the whole device can be improved through the first sealing ring 16, the second sealing ring 17 and other structures, water is prevented from entering the joint of the cable, the safety of using the electric wire and the cable is improved, and the sealing performance of the whole device is enhanced.

Further, the connecting plates 14 are arranged on two sides of the upper shell 31 and the lower shell 32, and the upper shell 31 and the lower shell 32 are fixedly connected through bolts.

Further, a first cable 6 and a second cable 7 are arranged in the insulation protection tube 1, and the first cable 6 and the second cable 7 are connected through a copper bar.

When the cable fixing device is used, firstly, the first cable 6 and the second cable 7 respectively penetrate through the insulation protection pipes 1 on two sides of the fixing device 3, then the three-phase wire cores of the first cable 6 and the second cable 7 are made into cold pressure heads by using hydraulic pliers and wiring terminals, the first cable 6 and the second cable 7 are connected by using bolts and copper bars, the connected three-phase wire cores are respectively bound by using an insulation adhesive tape and a heat-shrinkable tube, the upper shell 31 and the lower shell 32 are fixedly connected by using the bolts, the fastening bolts 10 on the movable frame 9 are screwed, the movable frame 9 moves towards the fixing device 3, the movable frame 9 gradually presses the movable plate 8 downwards, the spring 18 is compressed, the movable plate 8 moves downwards, the connecting rod 4 is driven to move downwards, the fixing plate 8 is driven to move downwards, finally, the bottom surface of the fixing plate 5 is tightly attached to the surface of the cable, the fixing device 3 is fixed, Each junction of sealing device 2 and insulating protective tube 1 is filled with sealed glue and is sealed, guarantees the leakproofness of whole device, when needing to dismantle the cable, can loosen fastening bolt 10, because the effect of spring 18 makes fly leaf 8 and movable support 9 propped up, and then makes the fixed plate 5 bottom surface break away from the cable surface, can normally dismantle the cable.

The above-mentioned embodiments are merely preferred embodiments of the present invention, and should not be considered as limitations of the present invention, and the protection scope of the present invention should be defined by the technical solutions described in the claims, and includes equivalent alternatives of technical features in the technical solutions described in the claims. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.

Claims

1. The utility model provides a power station dive deep-well pump cable junction structure which characterized in that: comprises an insulation protective pipe (1), a sealing device (2) and a fixing device (3), wherein the fixing device (3) comprises an upper shell (31) and a lower shell (32), the left side and the right side of the upper shell (31) are respectively provided with an upper positioning groove (311), the left side and the right side of the lower shell (32) are respectively provided with a lower positioning groove (321) corresponding to the upper positioning groove (311), the upper positioning groove (311) and the lower positioning groove (321) are matched to form an opening for the insulation protective pipe (1) to pass through, connecting rods (4) are arranged on the upper side wall and the lower side wall of the fixing device (3) in a penetrating manner, the bottom ends of the connecting rods (4) are fixedly connected with a fixing plate (5), the bottom surface of the fixing plate (5) is slidably connected with a first cable (6), one side of the first cable (6) is connected with a second cable (7), the second cable (7) is slidably connected with the bottom of the fixing plate (5), the top end of the connecting rods (4) is fixedly connected with a movable plate (8), the bottom of the movable plate (8) is fixedly provided with a spring (18), the lower end of the spring (18) is fixedly connected with the fixing device (3), the top of the movable plate (8) is provided with a movable support (9), the bottom of the movable support (9) is movably arranged on the side wall of the fixing device (3) in a penetrating mode, the top of the movable support (9) is provided with a fastening bolt (10), the fastening bolt (10) is in threaded connection with the movable support (9) and the fixing device (3) in a penetrating mode, openings in two sides of the fixing device (3) are connected with an insulating protective pipe (1), and one end of the insulating protective pipe (1) is connected with a sealing device (2).

2. The submersible deep well pump cable connection structure of a hydropower station according to claim 1, characterized in that: the insulating protective pipe (1) comprises an inner layer and an outer layer, wherein the outer layer is a stainless steel layer (11), and the inner layer is a PVC insulating layer (12).

3. The submersible deep well pump cable connection structure of a hydropower station according to claim 1, characterized in that: the sealing device (2) comprises a sealing cover (21), a first flange (22) and a sealing gasket (23), the sealing cover (21) is fixedly connected with the first flange (22), one end of the insulating protective pipe (1) is connected with a second flange (13), the first flange (22) is fixedly connected with the second flange (13) through bolts, and the sealing gasket (23) is connected between the first flange (22) and the second flange (13).

4. The submersible deep well pump cable connection structure of a hydropower station according to claim 1, characterized in that: the bottom surface of the fixing plate (5) is fixedly connected with an insulating rubber mat (15), and anti-skid lines are arranged on the insulating rubber mat (15).

5. The submersible deep well pump cable connection structure of a hydropower station according to claim 1, characterized in that: and a first sealing ring (16) is fixedly arranged on the outer side of the movable support (9), and the bottom of the first sealing ring (16) is fixedly connected with the fixing device (3).

6. The submersible deep well pump cable connection structure of a hydropower station according to claim 1, characterized in that: and a second sealing ring (17) is fixedly arranged at an opening on the fixing device (3), and the bottom of the second sealing ring (17) is fixedly connected with the fixing device (3).

7. The submersible deep well pump cable connection structure of a hydropower station according to claim 1, characterized in that: and the two sides of the upper shell (31) and the lower shell (32) are respectively provided with a connecting plate (14), and the upper shell (31) and the lower shell (32) are fixedly connected through bolts.

8. The submersible deep well pump cable connection structure of a hydropower station according to claim 1, characterized in that: a first cable (6) and a second cable (7) are arranged in the insulation protection pipe (1), and the first cable (6) and the second cable (7) are connected through copper bars.