Device for remotely detecting sheath ring current in cable working well

Abstract

The utility model relates to a device for remotely detecting sheath circulation in a cable working well and a working method thereof, and the device is characterized in that the device comprises a vertical first pipe body, a rechargeable battery arranged in the first pipe body and a first electric push rod powered by the rechargeable battery to work, and the free end of the first electric push rod is connected with a telescopic shaft; the upper portion of the telescopic shaft is fixedly connected with a first rotating shaft of a double-shaft motor, a second rotating shaft of the double-shaft motor is fixedly connected with a second pipe body coaxial with the first pipe body, a shell of the double-shaft motor is connected with a second electric push rod, and the free end of the second electric push rod is connected with a clip-on ammeter. The device for remotely detecting the loop current of the sheath in the cable working well is reasonable in design, and facilitates the detection of the cable when water is accumulated in the cable working well.

Description

Technical field:

[0002] The invention relates to a device for long-distance detection of sheath circulation in a cable well. Background technology:

[0004] In recent years, due to the needs of urban planning and construction, more and more high-voltage cable manholes have appeared. In order to ensure the safety and stability of power supply, timely detection of problems with high-voltage cables has become a top priority for power transmission workers.

[0005] The formation of cable sheath circulating current is mainly due to the induced electromotive force generated by the metal sheath under the action of AC power supply. This circulating current will not only cause the cable to heat up and increase energy loss, but may also cause a series of problems related to cable transmission. Therefore, it is necessary to inspect the cables in the high-voltage cable well from time to time.

[0006] However, when water accumulates in the cable shaft, inspectors cannot directly enter the shaft for inspection work. They can only stand on the ladder at the mouth of the cable shaft and tie a clamp-type ammeter on the end of the telescopic insulating operating rod to detect the circulating current of the sheath. Due to the many blind spots in the cable shaft, humidity, and no signal, the clamp-type ammeter cannot be accurately positioned at the inspection position, which causes certain troubles to the inspection work.

[0007] At present, a Chinese patent "A portable high-voltage cable circulation detection device" with publication number CN116338275A has been retrieved, which includes a box body, a box cover hinged on the top of the box body, a control panel installed inside the box body, a cavity arranged on one side of the inner part of the box body, a detection clamp installed in the cavity, a data printing window and a display screen installed on the control panel, the detection clamp is a ring structure composed of two semicircular rings, and a connecting line is installed at one end, and the middle part of the detection clamp is fixed to the inner wall of the cavity of the box body by bolts. In the portable high-voltage cable circulation detection device, the box body and the box cover are used for convenient packaging and carrying, and the device can be taken and transported at any time when used outdoors. The device has good portability and high safety. The detection clamp can be used to fix the wire to be detected, which is convenient for current measurement in any special environment. The measurement response is fast and the measurement accuracy is high. It is suitable for measuring wiring of different shapes (round steel, flat steel, angle steel and various copper materials), but the device cannot be used for detection when there is water accumulation in the high-voltage cable working shaft. Summary of the invention:

[0009] In view of the above problems, the purpose of the present invention is to provide a device for remotely detecting sheath circulation in a cable well. The device for remotely detecting sheath circulation in a cable well is reasonably designed and is conducive to detecting cables when water accumulates in the cable well.

[0010] The technical solution of the present invention is as follows:

[0011] The device for remotely detecting sheath circulation in a cable working shaft of the present invention is characterized by comprising an upright first tube body, a rechargeable battery arranged inside the first tube body and a first electric push rod powered by the rechargeable battery, the free end of the first electric push rod is connected to a telescopic shaft, the upper part of the telescopic shaft is fixedly connected to the first rotating shaft of a dual-axis motor, the second rotating shaft of the dual-axis motor is fixedly connected to a second tube body coaxial with the first tube body, the housing of the dual-axis motor is connected to a second electric push rod, and the free end of the second electric push rod is connected to a clamp ammeter.

[0012] Preferably, the lower end of the first tube body is fixedly connected to a lower support plate supported on the ground, and the upper end of the second tube body is fixedly connected to an upper support plate supported on the ceiling.

[0013] Preferably, a plurality of rollers are provided on the lower surface of the lower support plate.

[0014] Preferably, a handle is connected to the first tube body.

[0015] Preferably, the handle is rotatably hinged to the first tube body.

[0016] Preferably, a camera is installed on the second tube body.

[0017] Preferably, the first electric push rod, the dual-axis motor and the second electric push rod are controlled by wired or wireless signals.

[0018] Preferably, the display image of the above-mentioned camera is output via a wired or wireless signal.

[0019] Preferably, the second tube body is provided with a hair dryer for heating the front end of the camera to remove fog.

[0020] The working method of the device for long-distance detection of sheath circulation in a cable well of the present invention is characterized in that: during use, when the cable well is flooded, it is impossible to directly enter the well for construction and detection work, and the detection personnel stand on the ladder at the cable wellhead, assemble the long-distance sheath circulation detection device and place it in the cable well. At this time, the distance between the upper support plate and the lower support plate is less than the height of the cable well. The detection personnel push the long-distance sheath circulation detection device close to the cable to be tested by means of a handle, control the first electric push rod to gradually raise the second tube body and the upper support plate until the upper support plate and the lower support plate are respectively placed on the ceiling and the ground of the well, control the dual-axis motor to rotate, so that the second push rod and the clamp ammeter rotate around the first tube body to approach the cable to be tested, and then control the extension and retraction of the second electric push rod to make the measuring clamp at the front end of the clamp ammeter clamp into or detach from the cable to be tested.

[0021] The advantages of the device for long-distance detection of sheath circulation in a cable well of the present invention are as follows:

[0022] The inspector can use the handle to push the long-distance sheath circulating current detection device close to the cable to be tested, and can push the telescopic shaft and the second tube body up through the first electric push rod, so that the device can be upright and fixed in the working well, and through the operation of the dual-axis motor, the second electric push rod and the clamp-on ammeter can be rotated close to the cable to be tested, and through the operation of the second push rod, the measuring clamp at the front end of the clamp-on ammeter can be stuck in the cable to be tested or detached from the cable to be tested.

[0023] The device for remotely detecting sheath circulation in a cable well of the present invention is reasonably designed and can ensure the safety of detection personnel, and is conducive to detecting the cable when water accumulates in the cable well. Description of the drawings:

[0025] The present invention is further described below in conjunction with the accompanying drawings;

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0028] Figure 3 is a schematic diagram of the cross-sectional structure of the connection between the telescopic shaft and the first rotating shaft;

[0029] Figure 4 It is a schematic diagram of the cross-sectional structure of the connection between the baffle and the second rotating shaft. Specific implementation method:

[0031] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0032] The device for remotely detecting sheath circulation in a cable well of the present invention comprises an upright first tube body 1, a rechargeable battery 01 arranged inside the first tube body 1, and a first electric push rod 2 powered by the rechargeable battery. The first tube body 1 is a metal tube, the rechargeable battery 01 is arranged at the inner bottom of the first tube body 1, the first electric push rod 2 is arranged inside the first tube body 1 and close to the first electric push rod 2, and the first electric push rod 2 is powered by the rechargeable battery 01.

[0033] The free end of the first electric push rod 2 faces the upper end of the first tube body 1 and is connected to a telescopic shaft 3. Under the action of the first electric push rod 2, the telescopic shaft 3 can be telescoped inside the first tube body 1. The farthest working end of the first electric push rod 2 keeps the lower end of the telescopic shaft 3 still inside the first tube body 1 (for ensuring the stability of telescopic sliding). The nearest working end of the first electric push rod 2 makes the upper end of the telescopic shaft 3 just expose the tube opening of the first tube body 1.

[0034] The upper part of the telescopic shaft 3 is fixedly connected to the first rotating shaft 5 of the dual-axis motor 4, and the second rotating shaft 6 of the dual-axis motor is fixedly connected to a second tube body 7 coaxial with the first tube body 1. The shell of the dual-axis motor 4 is connected to a second electric push rod 8, and the free end of the second electric push rod 8 is connected to a clamp-on ammeter 9. When the first tube body 1 and the second tube body 7 are fixed, when the dual-axis motor 4 is working, the shell of the dual-axis motor 4 and the second electric push rod 8 and the clamp-on ammeter 9 connected thereto rotate together, thereby realizing the swinging of the clamp-on ammeter 9 close to the cable to be tested.

[0035] The first rotating shaft 5 is sleeved with the recessed groove at the upper end of the telescopic shaft 3, and is connected to the recessed groove by a key to achieve relative fixation of the two; the second rotating shaft 6 is sleeved with the baffle 02 in the second tube body 7 (the baffle 02 is fixed in the second tube body), and a key is provided on the second rotating shaft 6 to connect the baffle to achieve relative fixation of the two.

[0036] In order to ensure that the first tube body and the second tube body are installed stably and reliably, the lower end of the first tube body 1 is fixedly connected to a lower support plate 10 supported on the ground, and the upper end of the second tube body 7 is fixedly connected to an upper support plate 11 supported on the ceiling. Under the action of the first electric push rod 2, the lower support plate 10 is pressed tightly against the ground, and the upper support plate 11 is pressed tightly against the ceiling, so that the housing of the dual-axis motor 4, the second electric push rod 8 and the clamp ammeter 9 are stable and reliable when rotating and will not tip over.

[0037] To facilitate the operation of the inspector, a handle 13 is connected to the first tube body 1, and the handle is a tube rod. The handle 13 and the first tube body 1 can be fixedly connected or rotatably hinged in a vertical plane. In one embodiment, the handle 13 and the first tube body 1 are vertically fixedly connected; in another embodiment, the handle 13 and the first tube body 1 are rotatably hinged in a vertical plane. When in use, the handle 13 is adjusted to be perpendicular to the first tube body 1. When not in use, the handle 13 is adjusted to be parallel to the first tube body 1.

[0038] In order to facilitate the movement of the inspector, at least three rollers 12 are provided on the lower surface of the lower support plate. Under the action of the first electric push rod, the rollers 12 are pressed against the ground.

[0039] For the convenience of observation, a camera 14 is installed on the second tube body 7. A hair dryer is provided on the second tube body 7 for heating the front end of the camera to remove fog. The camera 14 can be used to observe the detection situation and detection data. By installing the hair dryer, the fog at the front end of the camera in the well can be removed, thereby facilitating the operation of the detection personnel.

[0040] Preferably, the control of the first electric push rod 2, the dual-axis motor 4 and the second electric push rod 8 is controlled by wired or wireless signals; the display image of the camera 14 is output through wired or wireless signals. When connected by wire, the inspection personnel can view and operate on the ladder in the shaft, and when connected by wireless, the inspection personnel can operate remotely.

[0041] The working method of the device for long-distance detection of sheath circulation in a cable well of the present invention is as follows: when the cable well is flooded, it is impossible to directly enter the well for inspection and construction work, and the inspection personnel stand on the ladder at the cable well mouth, assemble the long-distance sheath circulation detection device and place it in the cable well. At this time, the distance between the upper support plate and the lower support plate is less than the height of the cable well. The inspection personnel push the long-distance sheath circulation detection device close to the cable to be tested by means of a handle, control the first electric push rod to gradually raise the second tube body and the upper support plate until the upper support plate and the lower support plate are respectively placed on the ceiling and the ground of the well, control the dual-axis motor to rotate, so that the second push rod and the clamp ammeter rotate around the first tube body to approach the cable to be tested, and then control the extension and retraction of the second electric push rod to make the measuring clamp at the front end of the clamp ammeter clamp into or detach from the cable to be tested.

[0042] The advantages of the device for long-distance detection of sheath circulation in a cable well of the present invention are as follows:

[0043] The inspector can use the handle to push the long-distance sheath circulating current detection device close to the cable to be tested, and can push the telescopic shaft and the second tube body up through the first electric push rod, so that the device can be upright and fixed in the working well, and through the operation of the dual-axis motor, the second electric push rod and the clamp-on ammeter can be rotated close to the cable to be tested, and through the operation of the second push rod, the measuring clamp at the front end of the clamp-on ammeter can be stuck in the cable to be tested or detached from the cable to be tested.

[0044] The device for remotely detecting sheath circulation in a cable well of the present invention is reasonably designed and can ensure the safety of detection personnel, and is conducive to detecting the cable when water accumulates in the cable well.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A device for long-distance detection of sheath circulation in a cable well. Features: It includes an upright first tube body, a rechargeable battery arranged inside the first tube body and a first electric push rod powered by the rechargeable battery, the free end of the first electric push rod is connected to a telescopic shaft, the upper part of the telescopic shaft is fixedly connected to the first rotating shaft of a dual-axis motor, the second rotating shaft of the dual-axis motor is fixedly connected to a second tube body coaxial with the first tube body, the housing of the dual-axis motor is connected to a second electric push rod, and the free end of the second electric push rod is connected to a clamp ammeter.

2. The device for remotely detecting sheath circulation in a cable well according to claim 1, Features: The lower end of the first tube body is fixedly connected to a lower support plate supported on the ground, and the upper end of the second tube body is fixedly connected to an upper support plate supported on the ceiling.

3. The device for remotely detecting sheath circulation in a cable well according to claim 2, Features: A plurality of rollers are arranged on the lower surface of the lower support plate.

4. The device for remotely detecting sheath circulation in a cable well according to claim 3, Features: The first tube is connected with a handle.

5. The device for remotely detecting sheath circulation in a cable well according to claim 4, Features: The handle is rotatably hinged to the first tube body.

6. The device for remotely detecting sheath circulation in a cable well according to claim 5, Features: A camera is installed on the second tube body.

7. The device for remotely detecting sheath circulation in a cable well according to claim 6, Features: The first electric push rod, the dual-axis motor and the second electric push rod are controlled by wired or wireless signals.

8. The device for remotely detecting sheath circulation in a cable well according to claim 7, Features: The display image of the camera is output via a wired or wireless signal.

9. The device for remotely detecting sheath circulation in a cable well according to claim 8, Features: The second tube body is provided with a hair dryer for heating the front end of the camera to remove fog.

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