CN201829261U - 500KV mutual inductor hollow porcelain insulator - Google Patents
500KV mutual inductor hollow porcelain insulator Download PDFInfo
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- CN201829261U CN201829261U CN2010205365076U CN201020536507U CN201829261U CN 201829261 U CN201829261 U CN 201829261U CN 2010205365076 U CN2010205365076 U CN 2010205365076U CN 201020536507 U CN201020536507 U CN 201020536507U CN 201829261 U CN201829261 U CN 201829261U
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- hollow porcelain
- instrument transformer
- insulator
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Abstract
The utility model relates to an insulator, which belongs to the technical field of electric power transmission components, in particular to a mutual inductor hollow porcelain insulator applicable to a 500KV super-high-voltage power transmission system. The mutual inductor hollow porcelain insulator mainly comprises an upper flange, a sealing layer, a hollow porcelain insulation member, a lower flange and a mutual inductor arranged in a hollow part inside the hollow porcelain insulation member, wherein the mutual inductor adopts the static shielding and the ferromagnetic shielding, and a shielding layer is grounded. The insulator has strong insulation performance and anti-electromagnetic interference performance, large creepage distance and high safety and is simple to manufacture.
Description
Technical field
The utility model relates to a kind of insulator, and especially a kind of hollow porcelain insulator of instrument transformer that is applicable in the 500KV extra-high voltage transmission belongs to electric power transfer unit technical field.
Background technology
Insulator is commonly called as porcelain vase, is the insulator that is used for supporting lead.It can guarantee that lead and cross-arm, shaft tower have enough insulation, thereby is widely used in the overhead type transmission system.Because it is in operation and not only needs to bear the loading of lead vertical direction and the pulling force of horizontal direction, and need stand Exposure to Sunlight, drench with rain, the corrosion of climate change and chemical substance, therefore, insulator should have good electric property, and enough mechanical strengths are arranged again.
In order in time to grasp line voltage, the current running condition in high pressure and even the extra-high voltage transmission, usually adopt the measuring instrument that inserts in the transmission system that line voltage, electric current are directly monitored in the prior art, but have following defective: 1, the line voltage of transmission system, electric current are all very high, especially China's Henan area, usually adopt the extra-high voltage transmission of 500KV, measuring instrument has been proposed acid test; 2, different transmission system, its line voltage, electric current are often different, and often range is also inequality so to make the measuring instrument of monitoring usefulness, does not possess versatility; 3, measuring instrument directly inserts superhigh pressure, electric current transmission system, is difficult to guarantee instrument self and even surveying work personnel's safety; 4, the performance of anti-electromagnetic interference a little less than; 5, can't reflect earth fault.
Therefore, can be by common parts---the insulator in the existing transmission system, by transformation to the composition of insulator, material and even assembling, make it when possessing original support wire, insulating effect, realization is to the monitoring of transmission system, and overcome above-mentioned defective, for those skilled in the art have opened up brand-new thinking.
The utility model content
In order to solve the problems of the technologies described above, the utility model aims to provide the hollow porcelain insulator of a kind of 500KV instrument transformer, it can be under the prerequisite of keeping the insulator existing capability, pass through architecture advances, can monitor the voltage of superhigh pressure (for example 500KV) transmission of electricity electrical network, and overcome the anti-electromagnetic interference capability that exists in the prior art weak, to measuring instrument require too high, versatility is bad, fail safe is lower, can't monitor drawback such as earth fault.Its technical scheme that adopts is as follows:
The hollow porcelain insulator of this 500KV instrument transformer mainly comprises: hollow porcelain insulating spare, sealant, upper flange, lower flange and place instrument transformer in the described hollow porcelain insulating spare boring, and described instrument transformer adopts electrostatic screen and ferro-magnetic shield, shielding layer grounding.
Preferably, described sealant is a silicon rubber.
Preferably, this insulator also comprises adhesive, and it places the mucilage binding part of described upper flange and described hollow porcelain insulating spare and the mucilage binding part of described lower flange and described hollow porcelain insulating spare.
Preferably, described instrument transformer comprises hold-down nut, metal bar, becket, plain conductor, monitoring terminal and following hold-down nut.
Preferably, the realization of described upward hold-down nut is connected with described upper flange, and the realization of described hold-down nut down is connected with described lower flange, and the described hold-down nut lower end of going up connects described metal bar, and described becket is vertically passed in described metal bar lower end, the two insulation.
Preferably, described becket is received described monitoring terminal by described plain conductor, and described monitoring terminal is loaded on the outer surface of described hollow porcelain insulating spare.
Compared with prior art, the utlity model has following advantage:
1, insulation level height, strong, the creepage ratio of anti-electromagnetic interference capability are apart from big;
2, fail safe is higher: its high voltage with the primary circuit (extra-high pressure) becomes the low-voltage (for example 100V) of secondary circuit, the big electric current of primary circuit becomes the little electric current (5A) of secondary circuit, measuring instrument only inserts secondary circuit, implement electrical isolation with primary circuit high voltage and big electric current, thereby guaranteed the safety of surveying work personnel and instrumentation;
3, the measuring instrument versatility is good: it can make the measuring instrument manufacturer's standardization after adopting instrument transformer, and need not design instrument by measured voltage height and size of current;
4, take out zero sequence power supply, component of voltage for the protective relaying device use, reflection earth fault.
Description of drawings
Fig. 1: the half sectional view of the hollow porcelain insulator of 500KV instrument transformer of the present utility model (the first half is an external view, and the latter half is a cutaway view);
Fig. 2: the schematic diagram of instrument transformer 6 shown in Figure 1;
Fig. 3: the dimensional drawing of the hollow porcelain insulator of 500KV instrument transformer of the present utility model;
The partial enlarged drawing of Fig. 4: Fig. 1.
Symbol description: 1, upper flange; 2, adhesive; 3, sealant; 4, hollow porcelain insulating spare; 5, lower flange; 6, instrument transformer; 7, go up hold-down nut; 8, metal bar; 9, becket; 10, plain conductor; 11, monitoring terminal; 12, following hold-down nut.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing and example:
An embodiment of the present utility model as shown in Figure 1, the figure shows a hollow porcelain insulator of 500KV instrument transformer amplification vertical half sectional view, wherein the first half is an external view, the latter half is a cutaway view, below will explain detailedly.
This insulator can be used for extra-high voltage transmission, especially the 500KV transmission system of China's Henan area, it mainly comprises: upper flange 1, sealant 3, hollow porcelain insulating spare 4, lower flange 5 and place instrument transformer 6 in hollow porcelain insulating spare 4 borings, and instrument transformer 6 adopts electrostatic screen and ferro-magnetic shield, shielding layer grounding.
Described upper flange 1, lower flange 5 all are used for the installation of this insulator, adopt light weight and possess the metal of certain intensity, for example adopt aluminium alloy ZL114A.
Described hollow porcelain insulating spare 4 for example can adopt C120.
Described sealant 3 is used to realize the sealing property of this insulator integral body, for example adopts silicon rubber.
This insulator can also comprise adhesive 2, place upper flange 1 and the mucilage binding part of hollow porcelain insulating spare 4 and the mucilage binding part of lower flange 5 and hollow porcelain insulating spare 4, play bonding flange and hollow porcelain insulating spare 1, make its effect that becomes one, for example adopt the 525# portland cement as cement glue.
Interconnected relationship between described adhesive 2 and sealant 3, the lower flange 5 specifically can be referring to Fig. 4.
The primary circuit of described instrument transformer 6 is connected with upper flange, and secondary circuit insulate with it.
As shown in Figure 2, described instrument transformer 6 comprises hold-down nut 7, metal bar 8, becket 9, plain conductor 10, monitoring terminal 11, following hold-down nut 12, wherein, last hold-down nut 7 realizations are connected with upper flange 1, and following hold-down nut 12 is realized being connected with lower flange 5, and last hold-down nut 7 lower ends connect metal bar 8, becket 9 is vertically passed in metal bar 8 lower ends, the two insulation, becket 9 is received monitoring terminal 11 by plain conductor 10, and monitoring terminal 11 is loaded on the outer surface of hollow porcelain insulating spare 1.
Anti-electromagnetic interference function for the grid monitoring system that strengthens this insulator self and form thus, can also carry out following design:
(1) think better of the cloth line position, reasonable line arrangement separates primary circuit (forceful electric power) and secondary circuit (light current);
(2) alternating voltage of introducing is wherein isolated through isolating transformer, and isolating transformer is carried out electrostatic screen, shielding layer grounding;
(3) instrument transformer is wherein done electrostatic screen and ferro-magnetic shield, shielding layer grounding;
(4) adopt optocoupler 4N33 that control signal and forceful electric power loop are carried out the photoelectricity isolation to relay, prevent relay generation misoperation by integrated circuit control;
(5) signal processing unit of monitoring terminal 11 external inspecting devices carries out Filtering Processing to the signal of gathering;
(6) entire system is partly adopted electrostatic screen and ferro-magnetic shield, casing adopts the iron shield net; (7) p-wire that externally connects adopts strand and line;
(8) choose reasonable earth point.
Mark and following table in 3 in conjunction with the accompanying drawings, the size of this insulator each several part for example is as can be known:
Below operation principle of the present utility model and concrete enforcement are explained the main points briefly.
The hollow porcelain insulating spare of built-in instrument transformer and the mucilage binding position of upper and lower flange are brushed resilient coating, with cement glue upper and lower flange and hollow porcelain insulating spare are connect with fixed attention then, the finally sealed layer is coated silicon rubber and is formed this insulator; Upper flange is inserted the electrical network of 500KV transmission system; lower flange is fixed on the strutting piece; the 500KV extra-high pressure appears on metal bar (being the primary circuit); and because the capacitive sensing between metal bar and the becket; go up the generation low-voltage signal at becket (being secondary circuit); for example be low-voltage, the low current of 100V, 5A; and be sent to the monitoring terminal; connect devices such as charged demonstration, nuclear phase, relaying protection; from low-voltage signal, extract zero sequence power supply, component of voltage etc., carry out corresponding monitoring and handle.
Evidence: the minimum creep distance of this insulator can reach 13020mm, and the bending failure load is not less than 20kNm, torque failure load 3kNm; Hydraulic test 1MPa/min one by one, hydraulic pressure destroys load and is not less than 3MPa/min.
With way of example the utility model is illustrated above, but the utility model is not limited to above-mentioned specific embodiment, all any change or modification of doing based on the utility model all belong to the claimed scope of the utility model.
Claims (6)
1. hollow porcelain insulator of 500KV instrument transformer, it is characterized in that, comprise: upper flange (1), sealant (3), hollow porcelain insulating spare (4), lower flange (5) and place instrument transformer (6) in described hollow porcelain insulating spare (1) boring, and described instrument transformer (6) adopts electrostatic screen and ferro-magnetic shield, shielding layer grounding.
2. the hollow porcelain insulator of 500KV instrument transformer according to claim 1 is characterized in that described sealant (3) is a silicon rubber.
3. the hollow porcelain insulator of 500KV instrument transformer according to claim 1, it is characterized in that, this insulator also comprises adhesive (2), and it places described upper flange (1) and the mucilage binding part of described hollow porcelain insulating spare (4) and the mucilage binding part of described lower flange (5) and described hollow porcelain insulating spare (4).
4. the hollow porcelain insulator of 500KV instrument transformer according to claim 1, it is characterized in that described instrument transformer (6) comprises hold-down nut (7), metal bar (8), becket (9), plain conductor (10), monitoring terminal (11) and following hold-down nut (12).
5. the hollow porcelain insulator of 500KV instrument transformer according to claim 4, it is characterized in that, the realization of described upward hold-down nut (7) is connected with described upper flange (1), the realization of described hold-down nut (12) down is connected with described lower flange (5), described hold-down nut (7) lower end of going up connects described metal bar (8), described becket (9), the two insulation are vertically passed in described metal bar (8) lower end.
6. the hollow porcelain insulator of 500KV instrument transformer according to claim 4, it is characterized in that, described becket (9) is received described monitoring terminal (11) by described plain conductor (10), and described monitoring terminal (11) is loaded on the outer surface of described hollow porcelain insulating spare (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205365076U CN201829261U (en) | 2010-09-20 | 2010-09-20 | 500KV mutual inductor hollow porcelain insulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205365076U CN201829261U (en) | 2010-09-20 | 2010-09-20 | 500KV mutual inductor hollow porcelain insulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201829261U true CN201829261U (en) | 2011-05-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205365076U Expired - Fee Related CN201829261U (en) | 2010-09-20 | 2010-09-20 | 500KV mutual inductor hollow porcelain insulator |
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| Country | Link |
|---|---|
| CN (1) | CN201829261U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102254646A (en) * | 2011-05-13 | 2011-11-23 | 浙江华高电气有限公司 | Hollow composite insulator for ultrahigh-voltage direct-current equipment |
-
2010
- 2010-09-20 CN CN2010205365076U patent/CN201829261U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102254646A (en) * | 2011-05-13 | 2011-11-23 | 浙江华高电气有限公司 | Hollow composite insulator for ultrahigh-voltage direct-current equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110511 Termination date: 20120920 |