CN202433084U - Sensor unit for vibration of high voltage and ultrahigh voltage power cable during operation - Google Patents
Sensor unit for vibration of high voltage and ultrahigh voltage power cable during operation Download PDFInfo
- Publication number
- CN202433084U CN202433084U CN2011205060462U CN201120506046U CN202433084U CN 202433084 U CN202433084 U CN 202433084U CN 2011205060462 U CN2011205060462 U CN 2011205060462U CN 201120506046 U CN201120506046 U CN 201120506046U CN 202433084 U CN202433084 U CN 202433084U
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- hollow
- cable
- semicircular ring
- power cable
- duralumin
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Abstract
The utility model relates to a sensor unit for vibrations of a high voltage and ultrahigh voltage power cable during operation. The unit is characterized in that two hollow hard aluminum semi-circle rings are included, fasteners are disposed on two ends of each hollow hard aluminum semi-circle ring, the fasteners are used for fixing the two ends of the two hollow hard aluminum semi-circle rings together to form an annular sensor unit, a plurality of holes for mounting piezoelectric ceramics are disposed on the inner sides of the hollow hard aluminum semi-circle rings, and a plurality of piezoelectric ceramics are disposed in the hollow part of the hollow hard aluminum semi-circle rings via the holes. The vibration sensor unit in the utility model is mounted on an outer sheath of the high voltage and ultrahigh voltage cable, can effectively measure the vibration conditions of the cable, and can realize monitoring of the vibration state of the cable in combination with a signal analyzer, thereby perfecting current means of monitoring cable lines.
Description
Technical field
The utility model relates to a kind of high pressure and ultrahigh voltage power cable operational shock sensing unit; Particularly relate to a kind of measurement sensing unit that utilizes piezoelectric ceramics to measure the vibration that produces in the power cable operational process; This sensing unit can be installed on the high pressure and extra-high-tension cable of operation, realizes the measurement to the vibratory output in the cable operational process.
Background technology
At present, also not to the sensing unit of measuring and the equipment of the vibratory output in the operational process of high pressure and ultrahigh voltage power cable, more there is not the relevant vibrating sensing unit application of realization to the vibration survey of cable, to use.There are certain vibration really in high pressure and the ultrahigh voltage power cable big to power cable especially cross-sectional area of conductor under the effect of load current and voltage in operational process.Cable metal is overlapped in this long-term vibration and the influence of insulation course remains further to be studied; Therefore the vibration of monitoring power cable is that a kind of of running status of existing assessment cable replenishes, and realizes assessing the influence of vibration to the metal fatigue of the metallic sheath of high pressure and extra-high-tension cable and insulation course etc.The running state analysis that vibratory output through continuous monitoring cable operational process improves cable line is helpful.But for the monitoring of cable operational shock lacks necessary means and method again.
Piezoelectric ceramics is owing to himself characteristic, and displacement becomes certain ratio with magnitude of voltage, and the magnitude of voltage of therefore monitoring piezoelectric ceramics changes, and can calculate the value of its displacement, therefore can be used to realize the vibration monitoring of cable operational process.
Prior art also relates to related patent U.S. Patent No.; For example application number is the utility model patent of 03264584.8 Vibration-sensing cable by name; Relate to a kind of Vibration-sensing cable, comprise conductor and cable jacket, ecto-entad is provided with shielding protection layer, dielectric film and the magnetic of dimidiation along its length successively between conductor and cable jacket; Said conductor comprises two exposed movable conductor; Lay respectively at the edge of opening of magnetic, said shielding protection layer ground connection, said cable jacket is 2～3 layers.This Vibration-sensing cable does not have source distribution, and wiring is simple, and induction in time, and is safe in utilization, convenient, flexible, and various abominable physical environments of indoor and outdoor and high and low temperature environment are had very strong adaptive faculty.Yet the Vibration-sensing cable of this patent is used to monitor extraneous vibration, is not the vibration that is used to monitor cable operation itself, and therefore, this field of vibration at monitoring power cable remains at technological gap.
In view of this, be necessary to provide a kind of high pressure and ultrahigh voltage power cable operational shock sensing unit, to satisfy the commercial Application needs.
Summary of the invention
The purpose of the utility model is: in order to realize the measurement to the vibratory output of operation high pressure and ultrahigh voltage power cable, ad hocly counted a kind of power cable operational shock sensing unit that piezoelectric ceramics is installed that is installed on the cable jacket.
The technical scheme of the utility model is: a kind of high pressure and ultrahigh voltage power cable operational shock sensing unit; It is characterized in that; Comprise two hollow duralumin semicircular ring; The two ends of each hollow duralumin semicircular ring have securing member, are used for the two ends of two hollow duralumin semicircular ring are interfixed, and form an annular sensing unit; The inboard of said hollow duralumin semicircular ring has the hole that several are used to install piezoelectric ceramics, and several piezoelectric ceramics are arranged on the hollow space of hollow duralumin semicircular ring through this hole.
Aforesaid high pressure and ultrahigh voltage power cable operational shock sensing unit is characterized in that the signal wire of piezoelectric ceramics passes the hollow space of said hollow duralumin semicircular ring, and draw from a side, are connected on the signal analyzer.
Aforesaid high pressure and ultrahigh voltage power cable operational shock sensing unit is characterized in that the width of hollow duralumin semicircular ring is no more than 10mm, so that be installed in the trough place of metallic sheath.
Aforesaid high pressure and ultrahigh voltage power cable operational shock sensing unit; It is characterized in that; Two hollow duralumin semicircular ring make-ups are installed on the oversheath of cable, and fastening through screw, make piezoelectric ceramics fully contact with the oversheath of cable and certain precompression is arranged.
The beneficial effect of the utility model is: the utility model is installed in the vibrating sensing unit on high pressure and the extra-high-tension cable oversheath; Can effectively measure the vibration situation of cable; The binding signal analytical instrument realizes the monitoring to the cable vibration state; Improve existing cable line monitoring means, can analyze the influence of the vibration of cable operational process through long-term data accumulation metallic sheath and insulation course.This sensor is easy to install, and distributed installation can realize the monitoring to keypoint part.
Description of drawings
Fig. 1 is the structural representation of the utility model high pressure and ultrahigh voltage power cable operational shock sensing unit.
Fig. 2 is the cut-open view of the utility model high pressure and ultrahigh voltage power cable operational shock sensing unit.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed description, but this embodiment should not be construed as the restriction to the utility model.
Symbol description in the accompanying drawing: 1-piezoelectric ceramics; 2-signal wire; 3-hollow duralumin semicircular ring outside (certain intensity need be arranged, prop up the opposite side of piezoelectric ceramics); 4-hollow duralumin semicircular ring inboard (piezoelectric ceramics of installation hole is arranged); 5-holding screw; 6-fastening metal spare (band screw hole).
A kind of high pressure that the utility model provides and ultrahigh voltage power cable operational shock sensing unit; Comprise two hollow duralumin semicircular ring; The two ends of each hollow duralumin semicircular ring have securing member, are used for the two ends of two hollow duralumin semicircular ring are interfixed, and form an annular sensing unit; The inboard of said hollow duralumin semicircular ring has the hole that several are used to install piezoelectric ceramics, and several piezoelectric ceramics are arranged on the hollow space of hollow duralumin semicircular ring through this hole.
The signal wire 2 of piezoelectric ceramics 1 passes the hollow space of said hollow duralumin semicircular ring, and draws from a side, is connected on the signal analyzer.
The width of hollow duralumin semicircular ring is no more than 10mm, so that be installed in the trough place of metallic sheath.
Two hollow duralumin semicircular ring make-ups are installed on the oversheath of cable, and fastening through screw, make piezoelectric ceramics fully contact with the oversheath of cable and certain precompression is arranged.
Like Fig. 1 and shown in Figure 2; Semiorbicular hardware is that the duralumin semicircular ring by hollow constitutes; In the duralumin semicircular ring, survey boring so that piezoelectric ceramics is installed respectively in equally spaced position; 3 piezoelectric ceramics are installed on each is semi-circular, are useful on the fixing structural member of screw in the both sides of duralumin semicircular ring.The two ends of hollow duralumin semicircular ring interfix through holding screw 5 and fastening metal spare 6 and form the annular sensing unit.
The content of not doing in this instructions to describe in detail belongs to this area professional and technical personnel's known prior art.
Claims (4)
1. high pressure and ultrahigh voltage power cable operational shock sensing unit; It is characterized in that comprise two hollow duralumin semicircular ring, the two ends of each hollow duralumin semicircular ring have securing member; Be used for the two ends of two hollow duralumin semicircular ring are interfixed, form an annular sensing unit; The inboard of said hollow duralumin semicircular ring has the hole that several are used to install piezoelectric ceramics, and several piezoelectric ceramics are arranged on the hollow space of hollow duralumin semicircular ring through this hole.
2. high pressure according to claim 1 and ultrahigh voltage power cable operational shock sensing unit is characterized in that the signal wire of piezoelectric ceramics passes the hollow space of said hollow duralumin semicircular ring, and draw from a side, are connected on the signal analyzer.
3. high pressure according to claim 1 and ultrahigh voltage power cable operational shock sensing unit is characterized in that the width of hollow duralumin semicircular ring is no more than 10mm, so that be installed in the trough place of metallic sheath.
4. high pressure according to claim 1 and ultrahigh voltage power cable operational shock sensing unit; It is characterized in that; Two hollow duralumin semicircular ring make-ups are installed on the oversheath of cable, and fastening through screw, make piezoelectric ceramics fully contact with the oversheath of cable and certain precompression is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205060462U CN202433084U (en) | 2011-12-08 | 2011-12-08 | Sensor unit for vibration of high voltage and ultrahigh voltage power cable during operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205060462U CN202433084U (en) | 2011-12-08 | 2011-12-08 | Sensor unit for vibration of high voltage and ultrahigh voltage power cable during operation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202433084U true CN202433084U (en) | 2012-09-12 |
Family
ID=46782524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205060462U Expired - Lifetime CN202433084U (en) | 2011-12-08 | 2011-12-08 | Sensor unit for vibration of high voltage and ultrahigh voltage power cable during operation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202433084U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103412213A (en) * | 2013-07-25 | 2013-11-27 | 广西电网公司南宁供电局 | Crosslinked polyethylene high-voltage cable on-line monitoring and early warning system |
| CN104297517A (en) * | 2014-10-13 | 2015-01-21 | 上海交通大学 | Wind speed measurement instrument based on PVDF sensors |
| CN105490227A (en) * | 2016-02-20 | 2016-04-13 | 周栋 | Connector of cable protecting pipes |
-
2011
- 2011-12-08 CN CN2011205060462U patent/CN202433084U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103412213A (en) * | 2013-07-25 | 2013-11-27 | 广西电网公司南宁供电局 | Crosslinked polyethylene high-voltage cable on-line monitoring and early warning system |
| CN104297517A (en) * | 2014-10-13 | 2015-01-21 | 上海交通大学 | Wind speed measurement instrument based on PVDF sensors |
| CN104297517B (en) * | 2014-10-13 | 2017-10-31 | 上海交通大学 | Air speed measuring apparatus based on PVDF sensors |
| CN105490227A (en) * | 2016-02-20 | 2016-04-13 | 周栋 | Connector of cable protecting pipes |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120912 |
|
| CX01 | Expiry of patent term |