CN206291991U - A kind of hv cable termination stress cone inner boundary device for pressure measurement - Google Patents
A kind of hv cable termination stress cone inner boundary device for pressure measurement Download PDFInfo
- Publication number
- CN206291991U CN206291991U CN201621385992.5U CN201621385992U CN206291991U CN 206291991 U CN206291991 U CN 206291991U CN 201621385992 U CN201621385992 U CN 201621385992U CN 206291991 U CN206291991 U CN 206291991U
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- cylinder
- stress cone
- inner boundary
- cable termination
- pressure
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- 238000009530 blood pressure measurement Methods 0.000 title claims abstract description 16
- 238000009413 insulation Methods 0.000 claims abstract description 13
- 239000007769 metal material Substances 0.000 claims abstract description 7
- 239000004411 aluminium Substances 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000011888 foil Substances 0.000 claims description 3
- 230000001131 transforming effect Effects 0.000 claims description 2
- 230000003321 amplification Effects 0.000 claims 1
- 238000003199 nucleic acid amplification method Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 5
- 230000001419 dependent effect Effects 0.000 abstract description 2
- 230000005684 electric field Effects 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 4
- 239000003822 epoxy resin Substances 0.000 description 4
- 229920000647 polyepoxide Polymers 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002463 transducing effect Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Processing Of Terminals (AREA)
- Cable Accessories (AREA)
Abstract
The utility model discloses a kind of hv cable termination stress cone inner boundary device for pressure measurement, including：Cylinder, strain transducer and pressure display table；The cylinder is the thin cylinder of metal material, and its external diameter is identical with cable insulation external diameter；The strain transducer is placed in the cylinder inner wall, along its axially arranged multiple, and is connected with the pressure display table.Strain transducer is internally pasted with outer insulation diameter identical metal material thin cylinder by using one, measurement inwall dependent variable is then converted to the stress of outer wall.Substituted by thin cylinder and insulated, obtain the inner boundary pressure of rubber stress cone, test device simple operation, measuring accuracy are high.
Description
Technical field
The utility model is related to device for pressure measurement technical field, is a kind of hv cable termination stress cone specifically
Inner boundary device for pressure measurement.
Background technology
Counted according to former years HV CABLE SYSTEM operation troubles, it is electric beyond removing cable body by the destruction of third party's external force
The probability that cable fittings break down is more than 70%.Cable accessory includes cable termination and joint.Due to cable termination this body structure,
The complexity of making, connection and service condition, easily breaks down, and is the weak link of safe operation of power system.High-tension electricity
Cable terminal once breaks down, it will cause the power outage of large area, and its direct or indirect economic loss is very big.To avoid electricity
The generation of cable terminal fault, by covering the methods such as rubber and plastic prefabricated component in power supply shield end, can make cable insulation and screen layer
Diameter expanded, formed stress cone, improve cable termination electric field concentration phenomenon, so as to increase the peace of electrical power distribution system
Quan Xing.
The prefabricated stress cone of rubber is the critical component of hv cable termination, the prefabricated stress cone of rubber and epoxy resin bushing,
Should be in close contact between cable insulation, and keep certain interfacial pressure, the size and distribution situation of interfacial pressure are directly affected
To the Electric Field Distribution of cable termination, so as to directly influence cable termination electric property.Cable termination breakdown field strength is with boundary
The increase of surface pressure and increase, when interfacial pressure reach to a certain degree after terminal breakdown strength reach saturation.Reaching saturation
In the past, the smaller local breakdown field strength of interfacial pressure was also smaller, and when interfacial pressure is uneven so that terminal electric field
, there is electric field concentration phenomenon in skewness, and the small end face of some interfacial pressures may be by electric field breakdown.Therefore, rubber is pre-
The stress distribution of stress cone processed is highly important to the stability and reliability of cable termination.
Cable terminal structure is complicated, and the inner boundary pressure of rubber stress cone also has epoxy resin set in addition to the elastic force of itself
Other active forces such as pipe, spring, therefore more difficult analysis；Also, the radial load of annular spring element is temporarily without suitable measurement apparatus at present.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of hv cable termination stress cone inner boundary pressure measxurement
Device, can be with the inner boundary pressure of the rubber stress cone of actually measured cable termination.
In order to solve the above technical problems, the utility model is surveyed there is provided a kind of hv cable termination stress cone inner boundary pressure
Amount device, including：Cylinder, strain transducer and pressure display table；The cylinder for metal material thin cylinder, its external diameter with
Cable insulation external diameter is identical；The strain transducer is placed in the cylinder inner wall, along its axially arranged multiple, and with the pressure
Display table connection.
Further, strain transducer line centered on the axis of the cylinder is symmetrical arranged.
Further, the pressure display table includes：Preamplifier, analog-digital converter, linearizer, scale converter
And display；The strain transducer gathers strain signal, and strain signal is converted into electric signal, and electric signal is by preceding storing
Big device is amplified treatment, and the electric signal after enhanced processing is converted to data signal, the data signal by analog-digital converter
Exported to display after the nonlinear compensation and scale conversion of linearized device and scales transforming device.
Further, the cylinder material is aluminium.
Further, the 3 ~ 5mm of wall thickness of cylinder.
Further, the wall thickness of cylinder 5mm.
Further, the strain transducer is foil gauge.
Beneficial effect：
Interfacial pressure test device described in the utility model, by thin with outer insulation diameter identical metal material using one
Wall cylinder internally pastes strain transducer, and measurement inwall dependent variable is then converted to the stress of outer wall.Replaced by thin cylinder
Generation insulation, obtains the inner boundary pressure of rubber stress cone, and test device simple operation, measuring accuracy are high.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model hv cable termination stress cone inner boundary device for pressure measurement；
Fig. 2 is the structural representation of the utility model hv cable termination stress cone inner boundary device for pressure measurement use state
Figure.
In figure, 1. terminal outlet rod, 2. terminal epoxy resin bushing, 3. cylinder, 4. rubber stress cone, 5. terminal
Mounting flange, 6. spring attachment, 7. pressure display table, 701. preamplifiers, 702. analog-digital converters, 703.
Linearizer, 704. scale converters, 705. displays 8. protect tail pipe, 9. cable metal sheath.
Specific embodiment
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings, so that those skilled in the art
The utility model may be better understood and can be practiced, but illustrated embodiment is not as to restriction of the present utility model.
Embodiment one：
As shown in figure 1, a kind of hv cable termination stress cone inner boundary device for pressure measurement, including：Cylinder 3, strain are passed
Sensor 13 and pressure display table 7；The cylinder 3 is the thin cylinder of metal material, and its external diameter is identical with cable insulation external diameter；Institute
The inwall that strain transducer 13 is placed in the cylinder 3 is stated, along its axially arranged multiple, and is connected with the pressure display table 7.
The use state of the hv cable termination stress cone inner boundary device for pressure measurement is as shown in Fig. 2 set
In in the hv cable termination that need to be measured.
Specifically number of assembling steps is as follows：
First step：After determining the installation site of rubber stress cone 4, divest the oversheath on cable top, protective metal shell and
Buffering water blocking layer exposes the out semiconductor layer of cable, and the oversheath for divesting cable bottom exposes the protective metal shell of cable；
Second step：After determining cable metal set fracture site, according to the installation site of rubber stress cone 4 and the length of cylinder 3,
The crosslinked polyethylene major insulation part of cable body is divested, exposes cable conductor core；
Third step：The cylinder 3 that strain transducer 13 will be provided with is sheathed on cable conductor core, and transducing signal cable is from circle
The inside of cylinder 3 is drawn, and it is used to connect strain transducer 13 and pressure display table 7；
Four steps：Rubber stress cone set 4 after will be expanding is sheathed on the outer surface of cylinder 3；
5th step：In the upper end installing terminal outlet rod 1 of cylinder 3；
6th step：Terminal mounting flange 5 is sheathed on the bottom of rubber stress cone 4, and fixedly mounts spring thereon
Hold-down gear 6；
7th step：Terminal epoxy resin bushing 2 is passed through into terminal outlet rod 1, and is connected with terminal mounting flange 5；
8th step：Protection tail pipe 8 is penetrated from the protective metal shell of cable bottom, the perforate on protection tail pipe 8 will be sensed
Signal cable is pulled out, and then protection tail pipe 8 is fixedly mounted on terminal mounting flange 5；
9th step：Transducing signal cable is connected with pressure display table 7.
The cylinder 3 using metal material thin cylinder, its external diameter is identical with cable insulation external diameter, be in order to obtain compared with
Big deflection has and possesses rigidity higher simultaneously, and can accurately analog insulation stress.Meanwhile, because rubber should
The composition of power cone 4 also includes metalwork in addition to rubber, so axially various location interfacial pressure is different, therefore, along axle
To the multiple strain transducers 13 of distribution.Multiple strain transducers 13 collect the deflection of the inwall of cylinder 3, by pressure display table
7 show interfacial pressure.
Embodiment two：
In one optional embodiment of embodiment one, the line centered on the axis of the cylinder 3 of the strain transducer 13
It is symmetrical arranged.The wall thickness processing of cylinder 3 is uneven and the ring interfacial pressure of rubber stress cone 4 difference is likely to result in measurement not
Accurately, average is measured by by the deformation that two symmetrical strain transducers 13 are collected, measurement data can be made more accurate.
Embodiment three：
In one optional embodiment of embodiment one, as shown in Fig. 2 the pressure display table 7 includes：Preamplifier
701st, analog-digital converter 702, linearizer 703, scale converter 704 and display 705；The collection pressure of the strain transducer 13
Force signal, and pressure signal is converted into electric signal, electric signal is amplified treatment, enhanced processing by preamplifier 701
Pressure signal afterwards is converted to data signal by analog-digital converter 702, and the linearized device 703 of data signal and scale turn
Exported after the nonlinear compensation of parallel operation 704 and scale conversion to display 705.Because having multiple strain transducers 13, the display
The settable multiple viewing area of device 705.
More preferably, the line centered on the axis of the cylinder 3 of the strain transducer 13 is symmetrical arranged.
Example IV：
In one optional embodiment of embodiment one, the material of the cylinder 3 is aluminium.Groped by a large amount of practices, aluminium conduct
The material of cylinder 3, can more preferably analog insulation stress.
Embodiment five：
In one optional embodiment of embodiment one, the 3 ~ 5mm of wall thickness of the cylinder 3.
In certain limit, the wall thickness of cylinder 3 is thinner, and its internal interfacial pressure of strain is more sensitive, in 3 ~ 5mm of wall thickness, most
It is sensitive.Simultaneously, it is considered to which the factor such as precision, cost of manufacture, wall thickness 5mm is optimal.
Embodiment six：
In one optional embodiment of above-described embodiment one to five, the strain transducer 13 is foil gauge.
Embodiment described above is only the preferred embodiment lifted to absolutely prove the utility model, the utility model
Protection domain not limited to this.Equivalent substitute or change that those skilled in the art are made on the basis of the utility model
Change, within protection domain of the present utility model.Protection domain of the present utility model is defined by claims.
Claims (7)
1. a kind of hv cable termination stress cone inner boundary device for pressure measurement, including：Cylinder, strain transducer and pressure show
Table；The cylinder is the thin cylinder of metal material, and its external diameter is identical with cable insulation external diameter；The strain transducer is placed in institute
Cylinder inner wall is stated, along its axially arranged multiple, and is connected with the pressure display table.
2. hv cable termination stress cone inner boundary device for pressure measurement as claimed in claim 1, it is characterised in that it is described should
Become sensor line centered on the axis of the cylinder to be symmetrical arranged.
3. hv cable termination stress cone inner boundary device for pressure measurement as claimed in claim 1, it is characterised in that the pressure
Power display table includes：Preamplifier, analog-digital converter, linearizer, scale converter and display；The strain transducer
Collection strain signal, and strain signal is converted into electric signal, electric signal is amplified treatment by preamplifier, at amplification
Electric signal after reason is converted to data signal by analog-digital converter, the linearized device of data signal and scales transforming device
Exported after nonlinear compensation and scale conversion to display.
4. hv cable termination stress cone inner boundary device for pressure measurement as claimed in claim 1, it is characterised in that the circle
Cylinder material is aluminium.
5. hv cable termination stress cone inner boundary device for pressure measurement as claimed in claim 1, it is characterised in that the circle
3 ~ 5mm of barrel thickness.
6. hv cable termination stress cone inner boundary device for pressure measurement as claimed in claim 5, it is characterised in that the circle
Barrel thickness 5mm.
7. the hv cable termination stress cone inner boundary device for pressure measurement as described in claim 1 ~ 6 is any, it is characterised in that
The strain transducer is foil gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621385992.5U CN206291991U (en) | 2016-12-16 | 2016-12-16 | A kind of hv cable termination stress cone inner boundary device for pressure measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621385992.5U CN206291991U (en) | 2016-12-16 | 2016-12-16 | A kind of hv cable termination stress cone inner boundary device for pressure measurement |
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| Publication Number | Publication Date |
|---|---|
| CN206291991U true CN206291991U (en) | 2017-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621385992.5U Active CN206291991U (en) | 2016-12-16 | 2016-12-16 | A kind of hv cable termination stress cone inner boundary device for pressure measurement |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107505070A (en) * | 2017-08-28 | 2017-12-22 | 广东电网有限责任公司电力科学研究院 | A kind of interface pressure distribution testing method of cable accessory |
| CN108387330A (en) * | 2018-01-29 | 2018-08-10 | 华南理工大学 | Cable intermediate joint interfacial pressure measurement method based on MEMS pressure sensor |
| CN108534925A (en) * | 2018-03-28 | 2018-09-14 | 华南理工大学 | A kind of cable intermediate joint installation interface pressure measurement method based on pressure drag film |
| CN108931325A (en) * | 2018-07-06 | 2018-12-04 | 广东电网有限责任公司 | A kind of interfacial pressure measurement method based on cold-contraction type cable intermediate joint |
| CN109029810A (en) * | 2018-07-06 | 2018-12-18 | 广东电网有限责任公司 | A kind of cable prefabricated transition joint interfacial pressure axial direction distribution measurement method |
| CN109341926A (en) * | 2018-11-30 | 2019-02-15 | 国网江苏省电力有限公司无锡供电分公司 | Contraction Type Electric Cable Attachment in Crane Ore Group interfacial pressure detection method is pressed in one kind |
| CN109752119A (en) * | 2017-11-06 | 2019-05-14 | 深圳带路科技有限公司 | A kind of cable accessory interfacial pressure measuring device and method |
| CN109916547A (en) * | 2019-03-08 | 2019-06-21 | 广州供电局有限公司 | Apparatus and method for pressure suffered by analogue measurement cable connector installation interface |
| CN111964819A (en) * | 2020-07-14 | 2020-11-20 | 西安理工大学 | Metal conductor and solid insulating material interface stress detection experiment system |
-
2016
- 2016-12-16 CN CN201621385992.5U patent/CN206291991U/en active Active
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107505070A (en) * | 2017-08-28 | 2017-12-22 | 广东电网有限责任公司电力科学研究院 | A kind of interface pressure distribution testing method of cable accessory |
| CN107505070B (en) * | 2017-08-28 | 2019-09-13 | 广东电网有限责任公司电力科学研究院 | A kind of interface pressure distribution testing method of cable accessory |
| CN109752119A (en) * | 2017-11-06 | 2019-05-14 | 深圳带路科技有限公司 | A kind of cable accessory interfacial pressure measuring device and method |
| CN108387330A (en) * | 2018-01-29 | 2018-08-10 | 华南理工大学 | Cable intermediate joint interfacial pressure measurement method based on MEMS pressure sensor |
| CN108534925A (en) * | 2018-03-28 | 2018-09-14 | 华南理工大学 | A kind of cable intermediate joint installation interface pressure measurement method based on pressure drag film |
| CN108931325A (en) * | 2018-07-06 | 2018-12-04 | 广东电网有限责任公司 | A kind of interfacial pressure measurement method based on cold-contraction type cable intermediate joint |
| CN109029810A (en) * | 2018-07-06 | 2018-12-18 | 广东电网有限责任公司 | A kind of cable prefabricated transition joint interfacial pressure axial direction distribution measurement method |
| CN109341926A (en) * | 2018-11-30 | 2019-02-15 | 国网江苏省电力有限公司无锡供电分公司 | Contraction Type Electric Cable Attachment in Crane Ore Group interfacial pressure detection method is pressed in one kind |
| CN109341926B (en) * | 2018-11-30 | 2020-12-15 | 国网江苏省电力有限公司无锡供电分公司 | Medium-pressure cold-compression type cable joint interface pressure detection method |
| CN109916547A (en) * | 2019-03-08 | 2019-06-21 | 广州供电局有限公司 | Apparatus and method for pressure suffered by analogue measurement cable connector installation interface |
| CN111964819A (en) * | 2020-07-14 | 2020-11-20 | 西安理工大学 | Metal conductor and solid insulating material interface stress detection experiment system |
| CN111964819B (en) * | 2020-07-14 | 2022-02-22 | 西安理工大学 | Metal conductor and solid insulating material interface stress detection experiment system |
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