CN218511675U

CN218511675U - Cable displacement detection device

Info

Publication number: CN218511675U
Application number: CN202221225464.9U
Authority: CN
Inventors: 王干军
Original assignee: China Southern Power Grid General Aviation Service Co ltd
Current assignee: China Southern Power Grid General Aviation Service Co ltd
Priority date: 2022-05-19
Filing date: 2022-05-19
Publication date: 2023-02-21
Anticipated expiration: 2032-05-19

Abstract

The utility model relates to a pipeline settlement monitoring technology field particularly relates to cable displacement detection device, include: a cable with an armor layer, the cable having an exposed section where the armor layer is exposed; the detection plate is provided with a capacitance grid, and the cable can slide relative to the detection plate; the armor layer comprises a plurality of concave-convex parts distributed at equal intervals, the capacitance grid comprises a plurality of electrodes parallel to the concave-convex parts, and the electrodes are distributed in a linear array along the axis of the cable. The utility model discloses design out the pick-up plate of laminating cable armor design to the unsmooth armor of cable law, be equipped with electric capacity coral on the pick-up plate, reflect the displacement volume of cable through the electric field intensity change between adjacent electrode slice and the armor concave-convex part, be favorable to detection device's installation through this kind of mode to can obtain accurate displacement volume.

Description

Cable displacement detection device

Technical Field

The utility model relates to a pipeline settlement monitoring technology field particularly relates to cable displacement detection device.

Background

In the current electrified era, electric underground pipelines are widely distributed in all corners of life, and the underground pipelines subside to damage the protective shell of the underground pipelines to cause electric leakage, so that personal electric shock casualty accidents occur; the underground pipeline is stretched after being settled, so that the underground pipeline generates heat, a fire disaster is caused, huge property loss is caused, and the life is possibly threatened; in severe cases, long-time power failure and line rush repair in the area can be directly caused, and huge economic loss is caused.

At present, the settlement of underground pipelines is monitored mainly by manually setting reference lines and marks, and the defects of high labor cost and incapability of monitoring in real time exist. Therefore, a cable displacement detecting device which can detect the displacement accurately and is convenient to arrange is needed.

Disclosure of Invention

Defect and not enough to cable displacement detection device among the prior art, the utility model discloses the purpose forms the capacitive grating formula sensor through the mode that electrode grid and unsmooth cable armor laminated mutually, utilizes the cable displacement to change the displacement volume that leads to the mode detection cable that electric capacity changes, reaches simple to operate, detects accurate purpose.

An object of the utility model is to provide a cable displacement detection device, include:

a cable with an armor layer, the cable having an exposed section where the armor layer is exposed;

the detection plate is provided with a capacitance grid, and the cable can slide relative to the detection plate;

the armor layer comprises a plurality of concave-convex parts distributed at equal intervals, the capacitance grid comprises a plurality of electrodes parallel to the concave-convex parts, and the electrodes are distributed in a linear array along the axis of the cable.

Preferably, the inner wall of the detection plate is an arc surface, the electrode is attached to the arc surface, and the axis of the arc surface is overlapped with the axis of the exposed section of the cable.

Preferably, each of the electrodes comprises 4 electrode plates, and the electrode plates comprise copper sheets or aluminum sheets.

Preferably, the electrodes and the outer contour of the armor layer are distributed at equal intervals.

Preferably, a plane a is defined perpendicular to the cable axis, the electrodes being parallel to the plane a.

Preferably, the test device further comprises an amplitude modulation type test system, which is used for applying an alternating voltage to the electrodes, so that two voltage signals U1 and U2 are formed between two adjacent electrodes and the concave-convex part, and when the concave-convex part moves relative to the two electrodes, the voltage signals U1 and U2 change.

Preferably, the alternating voltage loaded to the adjacent electrodes is a rectangular alternating voltage with the same frequency and the same amplitude and opposite direction.

Compared with the prior art, the utility model has the advantages of:

the utility model discloses design out the pick-up plate of laminating cable armor design to the unsmooth armor of cable law, be equipped with electric capacity coral on the pick-up plate, reflect the displacement volume of cable through the electric field intensity change between adjacent electrode slice and the armor concave-convex part, be favorable to detection device's installation through this kind of mode to can obtain accurate displacement volume.

Drawings

The figures are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing. Embodiments of various aspects of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:

fig. 1 is a schematic view of the cable displacement detecting device according to the present invention mounted on a cable;

fig. 2 is a schematic diagram of the detecting plate structure of the cable displacement detecting device of the present invention;

fig. 3 is a schematic diagram of the detection principle of the present invention.

Detailed Description

For a better understanding of the technical content of the present invention, specific embodiments are described below in conjunction with the accompanying drawings.

Combine fig. 1 to show, buried cable 100 probably subsides because of the geology and takes place the displacement, can obtain the speed and the law etc. that the cable subsides through the control to the displacement volume, but the cable subsides usually a long period's process, is difficult to detect out the change process through mark point, reference line etc. commonly used, consequently the utility model provides a cable displacement detection device.

Mainly aiming at cables with armoring layers, in particular to cables with regular concave-convex structures on the surfaces of the armoring layers, a section of exposed section 101 is arranged on the part of the cable exposed out of the bottom surface, generally, the cable comprises a cable core 102, insulation 103, the armoring layer 104 and a sheath 105, and the exposed section of the cable is exposed out of the armoring layer 104 by peeling off the sheath 105.

Wherein, the part exposed to the bottom surface is generally arranged indoors, such as in the detection chamber 1, the space 11 in the detection chamber 1 is a dry environment, which does not cause overlooking to the armor layer 104, the detection plate 2 is fixed at a fixed position in the detection chamber 1, such as on the bracket 12, and is connected to one side of the exposed section 101 through the connecting arm 13, wherein, the detection plate 2 is provided with a capacitance grid, and the cable can slide relative to the detection plate 2.

In an alternative embodiment, the face of the detector plate 2 and the exposed section 101 are maintained at a small separation, such as a 1mm gap.

According to the concave-convex parts 104a of the armor layer 104 distributed at equal intervals, the capacitance grid comprises a plurality of electrodes 21 parallel to the concave-convex parts, and the plurality of electrodes 21 are distributed in a linear array along the axis of the cable. In this way, the electrode 21 can continuously detect the axial movement of the armor 104.

Preferably, in order to ensure that the electric field intensity of each electrode 21 and the concave-convex part 104a is uniform, the inner wall of the detection plate 2 is a cambered surface, the electrode 21 is attached to the cambered surface, and the axis of the cambered surface is overlapped with the axis of the exposed section of the cable. Thus, the control electrodes 21 and the outer contour of the armor layer 104 are distributed at equal intervals, and the electric field intensity is kept uniform by controlling the same intervals.

In a preferred embodiment, the armour layer 104 comprises a plurality of parallel arranged reliefs 104a, as shown in figure 2, defining a plane a perpendicular to the cable axis, the electrodes 21 being parallel to the plane a. In this way, the area of each two electrodes 21 corresponding to the concave-convex portion 104a is related to the voltage between the two electrodes and the concave-convex portion 104a, when the cable moves axially, the terminal voltage of the two adjacent electrodes 21 changes, and the displacement of the cable is obtained by detecting the voltage signal.

In an alternative embodiment, each electrode comprises 4 electrode plates comprising copper or aluminum, for example, at position 1, each electrode has 2 electrode plates corresponding to one concave-convex portion, and when the cable is axially displaced to position 2, one of the motors has one electrode plate, and the other motor has 3 electrode plates corresponding to the concave-convex portions, so that a voltage change is formed, and the quantization characteristic can correspond to the displacement of the cable.

Further, the device also comprises an amplitude modulation type testing system which is used for loading alternating voltage to the electrodes 21, so that two voltage signals U1 and U2 are formed between two adjacent electrodes and the concave-convex part, and when the concave-convex part moves relative to the two electrodes 21, the voltage signals U1 and U2 change.

In a specific embodiment, the alternating voltage applied to the adjacent electrodes is a rectangular alternating voltage with the same frequency and the same amplitude and opposite direction. In this way, the voltage signals of the two adjacent electrodes 21 can be amplified, which is beneficial to obtaining more accurate results.

Combine above embodiment, the utility model discloses to the pick-up plate of the unsmooth armor design of cable law design laminating cable armor design, be equipped with electric capacity coral on the pick-up plate, reflect the displacement volume of cable through the electric field intensity change between adjacent electrode slice and the armor concave-convex part, be favorable to detection device's installation through this kind of mode to can obtain accurate displacement volume.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The present invention is intended to cover by those skilled in the art various modifications and adaptations of the invention without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention is subject to the claims.

Claims

1. A cable displacement detecting device, comprising:

the armor layer comprises a plurality of concave-convex parts which are distributed at equal intervals, the capacitance grid comprises a plurality of electrodes which are parallel to the concave-convex parts, and the plurality of electrodes are distributed in a linear array along the axis of the cable.

2. The cable displacement detecting device according to claim 1, wherein the inner wall of the detecting plate is a curved surface, the electrode is attached to the curved surface, and an axis of the curved surface coincides with an axis of the exposed section of the cable.

3. The cable displacement detecting device according to claim 1, wherein each of the electrodes comprises 4 electrode pieces, and the electrode pieces comprise copper sheets or aluminum sheets.

4. A cable displacement sensing device according to claim 1, 2 or 3, wherein the electrodes are equally spaced from the outer profile of the armour layer.

5. The cable displacement sensing device of claim 1, wherein a plane a is defined perpendicular to the cable axis, and the electrodes are parallel to plane a.

6. The cable displacement detecting device according to claim 1, further comprising an amplitude modulation type testing system for applying an alternating voltage to the electrodes to form two voltage signals U1 and U2 between two adjacent electrodes and the concave-convex portion, wherein the voltage signals U1 and U2 are changed when the concave-convex portion moves relative to the two electrodes.

7. The cable displacement detecting device according to claim 6, wherein the alternating voltages applied to the adjacent electrodes are rectangular alternating voltages with the same frequency and the same amplitude and opposite directions.