CN204116436U - A kind of extra-high voltage direct-current measurement mechanism with two sleeve radiating element - Google Patents
A kind of extra-high voltage direct-current measurement mechanism with two sleeve radiating element Download PDFInfo
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- CN204116436U CN204116436U CN201420575268.3U CN201420575268U CN204116436U CN 204116436 U CN204116436 U CN 204116436U CN 201420575268 U CN201420575268 U CN 201420575268U CN 204116436 U CN204116436 U CN 204116436U
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Abstract
The utility model relates to extra-high voltage direct-current field, discloses a kind of extra-high voltage direct-current measurement mechanism with two sleeve radiating element.The purpose of this utility model is to solve the heat dissipation problem in the steady-state operation of extra-high voltage direct-current voltage measuring apparatus.By installing an insulating sleeve at extra-high voltage direct-current voltage measuring apparatus insulating sleeve particular position inside, the thermal current that the heat that sleeve inner conductor temp .-elevating produces is formed is through top flange, the air-flow reflection space entered between fair water sleeves and external insulation sleeve forms chimney effect, (chimney effect (English: Stack effect) to refer to that gas is along having the space of verticality to rising or declining, and causes gas to add the phenomenon of strong convection) thus the flowing accelerating thermal current are conducive to the transmission of heat.It is simple that this structure has structure, the feature that thermal current flow effect is good.
Description
Technical field
The utility model belongs to extra-high voltage direct-current field, relates to a kind of extra-high voltage direct-current measurement mechanism with two sleeve radiating element.
Background technology
China's high pressure, extra-high voltage direct-current power transmission and transformation system require that voltage measurement accuracy is 0.2 grade, and general DC voltage measuring device design mainly concentrates on resistance, the choosing and stability of capacitance material; The aspect researchs such as the insulating property of electric-field intensity distribution and material.Straight-flow system is in order to ensure the accurate of voltage measurement, require that the electric current increasing measurement mechanism is 1mA or 2mA, considerably increase the thermal power of measurement mechanism like this, operation reliably and with long-term and stable operation, become DC voltage measuring device must faced by outstanding problem.Therefore comprehensive many-sided influence factor, adopt appropriate design, increase heat dissipation design, some Primary Component hot(test)-spot temperature of voltage divider can not be exceeded for a long time regulation running temperature, can ensure that voltage divider long-time running is reliable, otherwise the performance of Partial key device, insulating material can be caused to reduce, thus cause voltage divider external insulation puncture and have an accident.
Utility model content
The purpose of this utility model is to provide a kind of extra-high voltage direct-current measurement mechanism with two sleeve radiating element, and structure is simple, and hot gas flowing is effective, has good transmission effect for the heating in the steady-state operation of extra-high voltage direct-current voltage measuring apparatus.
The utility model is by the following technical solutions:
A kind of extra-high voltage direct-current measurement mechanism with two sleeve radiating element, comprise external insulation hollow combined insulator, the top of this external insulation hollow combined insulator is by top flangeseal, the inside of described external insulation hollow combined insulator is provided with insulation fair water sleeves further, this fair water sleeves internal placement has heating divider resistance, leave space between one end that one end of described insulation fair water sleeves is corresponding with external hollow composite insulator, ensure to be formed with space between described insulation fair water sleeves, external insulation hollow combined insulator and top ring flange; The thermal current sent out heat thermogenetic and formed when insulation fair water sleeves inner conductor is through top flange, and the space that air-flow reflection enters between insulation fair water sleeves and external insulation hollow combined insulator forms chimney effect.
Described insulation fair water sleeves is as a whole, and its axial two ends and two end flanges respectively leave a place gas gap M, 2cm≤M≤20cm.
The difference of the external diameter of described insulation fair water sleeves and the internal diameter of external insulation hollow combined insulator meets L≤20mm.
Compared with prior art, the utility model at least has following beneficial effect: the utility model is by installing an insulation fair water sleeves in extra-high voltage direct-current voltage measuring apparatus insulated hollow composite insulator inside, like this, when the thermal current of the heat formation of the heating conductor generation of insulation fair water sleeves inside encounters top flange dish, air-flow reflection enters the space between insulation fair water sleeves and external insulation hollow combined insulator, form chimney effect, (chimney effect is (English: Stack effect) to refer to that gas is along having the space of verticality to rising or declining, gas is caused to add the phenomenon of strong convection) thus the flowing of quickening thermal current, be conducive to the transmission of heat.It is simple that this structure has structure, and the feature that thermal current flow effect is good, has good transmission effect for the heating in the steady-state operation of extra-high voltage direct-current voltage measuring apparatus.
Accompanying drawing explanation
Fig. 1 is structure cut-open view of the present utility model.
Wherein, 1 is insulation fair water sleeves, and 2 is external insulation hollow combined insulator, and 3 is divider resistance (heating conductor), and 4 is top ring flange.
Embodiment
Below in conjunction with accompanying drawing, the invention will be described in further detail.
As shown in fig. 1,1,2 insulation fair water sleeves and the external insulation hollow combined insulators being respectively extra-high voltage direct-current voltage measuring apparatus, it is inner that insulation fair water sleeves 1 is arranged on external insulation hollow combined insulator 2, and the length of fair water sleeves is less than the length of external insulation hollow combined insulator, specifically, leave space between one end that one end of described insulation fair water sleeves (1) is corresponding with external hollow composite insulator (2), ensure to be formed with space between described insulation fair water sleeves, external insulation hollow combined insulator and top ring flange; The top of described external insulation hollow combined insulator 2 is by top flangeseal, insulation fair water sleeves 1 inside arranges divider resistance 3, like this, the thermal current that the heat that divider resistance 3 produces is formed is spatial flow between insulation fair water sleeves and external insulation hollow combined insulator, when this air-flow encounters top ring flange, reflect through top ring flange 4, thermal current forms chimney effect in space between insulation fair water sleeves 1 and exterior insulation hollow combined insulator 2, thus accelerate the flowing of thermal current, be conducive to the transmission of heat.
Claims (5)
1. one kind has the extra-high voltage direct-current measurement mechanism of two sleeve radiating element, it is characterized in that: comprise external insulation hollow combined insulator (2), the top of this external insulation hollow combined insulator (2) is sealed by top ring flange (4), the inside of described external insulation hollow combined insulator (2) is provided with insulation fair water sleeves (1) further, this insulation fair water sleeves (1) internal placement has heating divider resistance (3), space is left between one end that one end of described insulation fair water sleeves (1) is corresponding with external insulation hollow combined insulator (2), ensure described insulation fair water sleeves, space is formed between external insulation hollow combined insulator and top ring flange, the thermal current sent out heat thermogenetic and formed when insulation fair water sleeves inner conductor is through top flange, and the space that air-flow reflection enters between insulation fair water sleeves and external insulation hollow combined insulator forms chimney effect.
2. a kind of extra-high voltage direct-current measurement mechanism with two sleeve radiating element according to claim 1, is characterized in that: insulation fair water sleeves is as a whole, and its axial two ends and two end flanges respectively leave a place gas gap M, 2cm≤M≤20cm.
3. a kind of extra-high voltage direct-current measurement mechanism with two sleeve radiating element according to claim 1, is characterized in that: the difference of the described external diameter of insulation fair water sleeves and the internal diameter of hollow combined insulator meets L≤20mm.
4. a kind of extra-high voltage direct-current measurement mechanism with two sleeve radiating element as claimed in any of claims 1 to 3, is characterized in that: described insulation fair water sleeves and external insulation hollow combined insulator are coaxially arranged.
5. a kind of extra-high voltage direct-current measurement mechanism with two sleeve radiating element as claimed in any of claims 1 to 3, is characterized in that: described insulation fair water sleeves is enclosed in wherein to major general's heating conductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420575268.3U CN204116436U (en) | 2014-09-30 | 2014-09-30 | A kind of extra-high voltage direct-current measurement mechanism with two sleeve radiating element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420575268.3U CN204116436U (en) | 2014-09-30 | 2014-09-30 | A kind of extra-high voltage direct-current measurement mechanism with two sleeve radiating element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204116436U true CN204116436U (en) | 2015-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420575268.3U Active CN204116436U (en) | 2014-09-30 | 2014-09-30 | A kind of extra-high voltage direct-current measurement mechanism with two sleeve radiating element |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204116436U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104655897A (en) * | 2015-02-13 | 2015-05-27 | 咸阳永泰电力电子科技有限公司 | Thermal convection voltage divider |
| CN105891575A (en) * | 2016-06-14 | 2016-08-24 | 广东电网有限责任公司电力科学研究院 | Voltage divider |
-
2014
- 2014-09-30 CN CN201420575268.3U patent/CN204116436U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104655897A (en) * | 2015-02-13 | 2015-05-27 | 咸阳永泰电力电子科技有限公司 | Thermal convection voltage divider |
| CN105891575A (en) * | 2016-06-14 | 2016-08-24 | 广东电网有限责任公司电力科学研究院 | Voltage divider |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |