CN209199698U - Direct current equalizing resistance device - Google Patents
Direct current equalizing resistance device Download PDFInfo
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- CN209199698U CN209199698U CN201822153547.1U CN201822153547U CN209199698U CN 209199698 U CN209199698 U CN 209199698U CN 201822153547 U CN201822153547 U CN 201822153547U CN 209199698 U CN209199698 U CN 209199698U
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- direct current
- expansion joint
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Abstract
The utility model provides a kind of direct current equalizing resistance device, mainly thes improvement is that, including end cap, casing, resistor assembly, corrugated expansion joint, filler；The resistor assembly is arranged in casing, and filler is filled in casing；Filler has insulating properties；Corrugated expansion joint is separately installed at the both ends of resistor assembly；The both ends of casing are separately installed with end cap, and corrugated expansion joint and resistor assembly are sealed in casing；The end cap of the every one end of casing is connected with corresponding corrugated expansion joint；The both ends of resistor assembly are connect with the corrugated expansion joint of respective end or end cap respectively.The utility model has Standard resistance range wide, and specific power is big, moisture-proof, heat-resisting, high pressure resistant, the voltage of resistance to long-term work and the features such as electric pulse ability is strong in short-term.
Description
Technical field
The utility model relates to a kind of pressure resistor, specifically a kind of direct current equalizing resistance devices.
Background technique
With the development of economy, the electricity capacity of power grid increasingly increases.In terms of transmission technology, from the eighties in last century with
Come, the developing steps of power transmission technology are obviously accelerated, and the method for improving transmittability continues to bring out, existing direct current transportation skill
The new and high technologies such as art, flexible ac transmission technology, Fractional frequency technology, while also having the increasing to existing HVAC power transmission line
Hold renovation technique, such as boosting and transformation, lead capacity-increasing transformation again, transmission line of alternation current is changed to HVDC Transmission Technology.Direct current transportation, it is right
In the transmittability for improving existing Transmission system, existing equipment potentiality are excavated, is of great practical significance, implements
The effect got twice the result with half the effort can be received.When the high-voltage circuitbreaker separating brake of extra-high voltage, the fluctuation of fracture voltage becomes larger, very uneven
Surely.It is serious to generate phenomenon of arc discharge, the contact point for fracture of burning.And the scene of shoving of route can be generated, directly influence route
In measuring device safety.Therefore the series connection of DC bus high-speed switch in the line, needs to be resistant to specified 550kVdc direct current
Voltage, according to combined-voltage characteristic, selection is divided using resistors in parallel between DC bus high-speed switch fracture, this electricity
The main function of resistance device is exactly to play the role of partial pressure and press.Research and develop the difficult point that this resistor encounters: resistor is specified to its
Voltage, rated resistance, temperature-coefficient of electrical resistance, test voltage etc. have certain property to be strict with.The selection of external insulation casing pipe
It is also a great problem.Due to the elongated feature of product, to guarantee insulate creep distance, casing strength and weight demands.So set
Also a large amount of technology needs capture in pipe production.The sealing performance of this product also has strict requirements simultaneously, must not have any
Oil seepage phenomena.
Summary of the invention
For the deficiencies in the prior art, the utility model provides a kind of direct current equalizing resistance device, and use is totally-enclosed
Structure will not leak, and have Standard resistance range wide, and specific power is big, moisture-proof, heat-resisting, high pressure resistant, the voltage of resistance to long-term work and in short-term electricity
The features such as pulse ability is strong.The technical solution adopted in the utility model is:
A kind of direct current equalizing resistance device, mainly thes improvement is that, including end cap, casing, resistor assembly, bellows are mended
Repay device, filler；
The resistor assembly is arranged in casing, and filler is filled in casing；Filler has insulating properties；
Corrugated expansion joint is separately installed at the both ends of resistor assembly；The both ends of casing are separately installed with end cap, by wave
Line pipe compensator and resistor assembly are sealed in casing；The end cap of the every one end of casing is connected with corresponding corrugated expansion joint；
The both ends of resistor assembly are connect with the corrugated expansion joint of respective end or end cap respectively.
Further, the filler is solid-state when environment temperature is no more than 50 DEG C.
Further, the filler is microwax.
Further, liner plate is equipped between the end of resistor assembly and corrugated expansion joint.
Further, resistor assembly includes several sections of resistance strings, connects to form resistor assembly by each resistance string；Each resistance string
Between liner plate is set.
Further, each resistance length direction in resistance string is arranged radially along casing, arranged in parallel, successively head and the tail phase
Even, it is formed and is connected in series.
Further, casing includes epoxy tube and the multiple full skirts for being set in epoxy tube outer ring；The multiple full skirt is certainly
Casing one end is distributed to the other end.
Utility model has the advantages that this direct current equalizing resistance device uses all-sealed structure, inside is filled with microwax
As filler, moisture-proof is heat-resisting, high pressure resistant, and the voltage of resistance to long-term work and in short-term electric pulse ability are strong；Standard resistance range is wide, compares function
Rate is big；Structure is simple, and performance is stablized, convenient for installation and maintenance；To which the safety of stable DC bus high-speed switch is cut-off, guarantee straight
The quality for flowing equalizing resistance device entirety makes DC bus high-speed switch safety, smoothly operation in power grid, makes customer satisfaction.
Detailed description of the invention
Fig. 1 is the structure composition schematic diagram of the utility model.
Fig. 2 is the resistance string partial enlarged view of the utility model.
Specific embodiment
Below with reference to specific drawings and examples, the utility model is described in further detail.
As shown in Figure 1, the utility model proposes direct current equalizing resistance device, including end cap 1, casing 2, resistor assembly 3, wave
Line pipe compensator 4, liner plate 5, filler 6；
Described sleeve pipe 2 uses composite bushing, has many advantages, such as that intensity is high, light-weight, creepage distance is big；Casing 2 includes ring
Oxygen pipe 201 and the multiple full skirts 202 for being set in 201 outer ring of epoxy tube；The multiple full skirt 202 is distributed from 2 one end of casing to another
One end；Full skirt 202 is made of silicon rubber, and insulation performance is good, is also capable of increasing the creepage distance of casing；
The resistor assembly 3 is arranged in casing 2, and filler 6 is filled in casing 2；Filler 6 uses crystallite
Wax after being melted down in sprue bushing 2, is at normal temperature solid-state, can wrap the single resistance in resistor assembly 3；Microwax
About 70 DEG C of fusing point；This direct current equalizing resistance device in exhausted big portion the time be it is not energized, i.e., be not applied with voltage, direct current is equal at this time
Piezoresistance device itself will not generate heat, and bulk temperature is 50 DEG C of environment temperature, and filler Witcodur 272 is solid-state, will not be seeped
Leakage；Filler Witcodur 272 is high pressure resistant, plays the role of insulation, heat dissipation, moisture-proof；
Corrugated expansion joint 4 is separately installed at the both ends of resistor assembly 3；The both ends of casing 2 are separately installed with end cap 1,
Corrugated expansion joint 4 and resistor assembly 3 are entirely sealed in casing 2；The end cap 1 of the every one end of casing is mended with corresponding bellows
It repays device 4 to be connected, there is equipotential；Even if microwax is fused into liquid, will not reveal,
The both ends of resistor assembly 3 are connect with the corrugated expansion joint of respective end 4 or end cap 1 respectively, in this example with bellows
Compensator 4 is connected；Resistor assembly 3 can pass through wire connecting ends lid 1；Corrugated expansion joint uses corrugated stainless steel tubing, master
Acting on is the thermal expansion and contraction for compensating filler 6；
More preferably, liner plate 5 is equipped between the end of resistor assembly 3 and corrugated expansion joint 4；Liner plate 5 can reduce compensation
The volume of filler 6；
In order to meet the needs of the elongated feature of direct current equalizing resistance device product, resistor assembly 3 may include two sections or more
Resistance string 301, by each resistance string 301 series connection form resistor assembly 3；Liner plate 5 is set between each resistance string 301, prevents electricity
There is unwanted short circuit between resistance string, also reduces the volume of compensation filler 6；
Each resistance length direction in resistance string 301 is arranged radially along casing 2, and arranged in parallel successively joins end to end, and is formed
It is connected in series；The resistance string 301 of such structure, significantly improves pressure resistance, can be installed into casing greater number of resistance into
Row series connection, each electric resistance partial pressure is low, and overall pressure resistance performance is improved；And greater number of resistance also increases power.
Claims (7)
1. a kind of direct current equalizing resistance device, which is characterized in that mended including end cap (1), casing (2), resistor assembly (3), bellows
Repay device (4), filler (6)；
The resistor assembly (3) is arranged in casing (2), and is filled with filler (6) in casing (2)；Filler (6) tool
There is insulating properties；
Corrugated expansion joint (4) are separately installed at the both ends of resistor assembly (3)；The both ends of casing (2) are separately installed with end cap
(1), corrugated expansion joint (4) and resistor assembly (3) are sealed in casing (2)；The end cap (1) of the every one end of casing with it is corresponding
Corrugated expansion joint (4) is connected；
The both ends of resistor assembly (3) are connect with the corrugated expansion joint of respective end (4) or end cap (1) respectively.
2. direct current equalizing resistance device as described in claim 1, which is characterized in that
The filler (6) is solid-state when environment temperature is no more than 50 DEG C.
3. direct current equalizing resistance device as claimed in claim 2, which is characterized in that
The filler (6) is microwax.
4. direct current equalizing resistance device as claimed in claim 1,2 or 3, which is characterized in that
Liner plate (5) are equipped between the end and corrugated expansion joint (4) of resistor assembly (3).
5. direct current equalizing resistance device as claimed in claim 1,2 or 3, which is characterized in that
Resistor assembly (3) includes several sections of resistance strings (301), forms resistor assembly (3) by each resistance string (301) series connection；Each electricity
Liner plate (5) are set between resistance string (301).
6. direct current equalizing resistance device as claimed in claim 5, which is characterized in that
Each resistance length direction in resistance string (301) is arranged radially along casing (2), and arranged in parallel successively joins end to end, and is formed
It is connected in series.
7. direct current equalizing resistance device as described in claim 1, which is characterized in that
Casing (2) includes epoxy tube (201) and the multiple full skirts (202) for being set in epoxy tube (201) outer ring；The multiple full skirt
(202) it is distributed from casing (2) one end to the other end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822153547.1U CN209199698U (en) | 2018-12-20 | 2018-12-20 | Direct current equalizing resistance device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822153547.1U CN209199698U (en) | 2018-12-20 | 2018-12-20 | Direct current equalizing resistance device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209199698U true CN209199698U (en) | 2019-08-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822153547.1U Active CN209199698U (en) | 2018-12-20 | 2018-12-20 | Direct current equalizing resistance device |
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| Country | Link |
|---|---|
| CN (1) | CN209199698U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109461552A (en) * | 2018-12-20 | 2019-03-12 | 无锡市联达电器有限公司 | Direct current equalizing resistance device |
-
2018
- 2018-12-20 CN CN201822153547.1U patent/CN209199698U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109461552A (en) * | 2018-12-20 | 2019-03-12 | 无锡市联达电器有限公司 | Direct current equalizing resistance device |
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