CN112600392A - Insulating isolation protective cap of direct current capacitor assembly of intermediate frequency converter - Google Patents
Insulating isolation protective cap of direct current capacitor assembly of intermediate frequency converter Download PDFInfo
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- CN112600392A CN112600392A CN202011593974.7A CN202011593974A CN112600392A CN 112600392 A CN112600392 A CN 112600392A CN 202011593974 A CN202011593974 A CN 202011593974A CN 112600392 A CN112600392 A CN 112600392A
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- frequency converter
- protective cap
- direct current
- capacitor assembly
- current capacitor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
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Abstract
The invention belongs to the technical field of a special power supply medium-frequency power supply system for isotope separation, and particularly relates to an insulation isolation protective cap for a direct-current capacitor assembly of a medium-frequency converter, which comprises a top cover, a side wall, a groove and an outer corner; wherein top cap and lateral wall integrated into one piece, the top cap is connected at the top of lateral wall, and open in the outside of lateral wall bottom has the recess, and open in the top cap top outside has the exterior angle. The insulating isolation cap of the direct-current capacitor assembly of the frequency converter of the intermediate-frequency system, provided by the invention, has the advantages of small volume and simple structure, can be used for a long time, does not influence later-stage maintenance after installation, can replace and disassemble the capacitor, and achieves the effect of easy replacement.
Description
Technical Field
The invention belongs to the technical field of a special power supply medium-frequency power supply system for isotope separation, and particularly relates to an insulation isolation protective cap for a direct-current capacitor assembly of a medium-frequency converter.
Background
The medium frequency power supply system 300E frequency converter of a certain factory plans to maintain every year, repair each time, all can clean dust removal in the cabinet, the normal operating mode of the medium frequency system work frequency converter needs incessant long-term operation, frequency converter power cabinet direct current capacitance assembly generating line stromatolite is through long-term operation, anodal connection capacitance bolt is nearer with negative pole assembly copper distance, long-term continuous operation work back, here adsorbs magnetic metal static dust, can appear creepage breakdown discharge phenomenon when positive negative pole static dust of direct current capacitance assembly piles up and reaches a certain amount, cause parts such as special frequency converter contravariant return circuit IGBT, the contravariant drive plate, direct current capacitance assembly electric capacity to burn out, the safe and stable operation of main technology is influenced.
The power cabinet of the 300E frequency converter of the traditional intermediate frequency system has the following defects after long-term operation: the direct current capacitor assembly of the special intermediate frequency power supply system frequency converter has the advantages that the positive electrode connecting capacitor bolt is closer to the negative electrode assembly copper plate. After long-term continuous operation work, the magnetic metal electrostatic dust is adsorbed at the position, and when the electrostatic dust on the positive electrode and the negative electrode of the direct current capacitor assembly is accumulated to reach a certain amount, creepage breakdown discharge is generated, so that parts such as an inversion loop of a special frequency converter, an inversion driving plate, a capacitor of the direct current capacitor assembly are burnt, and the safe and stable operation of a main process is influenced.
Therefore, it is necessary to provide an insulation isolation protective cap for a direct current capacitor assembly of an intermediate frequency converter to solve the problems in the prior art.
Disclosure of Invention
The invention aims to provide an insulation isolation protective cap for a direct current capacitor assembly of a medium-frequency converter, which can prevent the damage caused by the accumulation and discharge of electrostatic dust of the direct current capacitor assembly by additionally arranging an insulation static protective pad on a 300E converter, eliminate the potential safety hazard of the 300E converter of a medium-frequency power supply system and ensure the long-term safe and stable operation of the 300E converter direct current system of the medium-frequency power supply system.
The technical scheme for realizing the purpose of the invention is as follows:
an insulation isolation protective cap of a direct current capacitor assembly of a medium frequency converter comprises a top cover, a side wall, a groove and an outer corner;
wherein top cap and lateral wall integrated into one piece, the top cap is connected at the top of lateral wall, and open in the outside of lateral wall bottom has the recess, and open in the top cap top outside has the exterior angle.
The top cover and the side wall are made of polytetrafluoroethylene materials.
The inner diameter of the side wall is 11 mm.
The width of the groove is 5 mm.
The height of the groove is 2 mm.
The thickness of the top cover is 5 mm.
The height of the protective cap is 15 mm.
The protective cap physically isolates and seals the capacitor wiring bolt.
The invention has the beneficial technical effects that:
(1) the insulating isolation cap of the direct current capacitor assembly of the frequency converter of the intermediate frequency system has the advantages of small volume and simple structure, and can be used for a long time.
(2) The invention thoroughly solves the problem that the positive electrode connecting capacitor bolt is close to the negative electrode assembly copper plate, and the magnetic metal electrostatic dust is easily adsorbed at the position after long-term continuous operation;
(3) after the direct current capacitor insulating isolation cap is installed, later-period maintenance is not influenced, and the capacitor is replaced and disassembled, so that the effect of easy replacement is achieved;
(4) the direct-current capacitor assembly insulating cap of the frequency converter of the intermediate frequency system is fully combined with previous equipment, so that the insulating cap and the bolt are tightly closed, the using effect of the insulating cap is ensured, and the effect of attractive protection can be achieved.
(5) After the direct-current capacitor assembly is additionally arranged, the labor intensity of emergency operation of process personnel is reduced, the influence of abnormal cycle descending frequency and cycle ascending impact of the host on the host is reduced, and the safe and stable operation and the service life of the special host are further ensured.
Drawings
Fig. 1 is a schematic structural diagram of an insulation isolation protective cap of a direct current capacitor assembly of an intermediate frequency converter provided in the present invention;
FIG. 2 is an assembly view of the insulating and isolating protective cap of the DC capacitor assembly of the IF converter according to the present invention;
in the figure: 1-a top cover; 2-a side wall; 3-a groove; 4-external angle; 5-protective cap; 6-positive bus copper plate; 7-an insulating plate; 8-capacitor terminal bolts; 9-negative electrode bus copper plate
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in FIG. 1, the invention provides an insulation isolation protective cap for a direct current capacitor assembly of a medium frequency converter, which comprises a top cover 1, a side wall 2, a groove 3 and an outer corner 4.
Wherein top cap 1 and lateral wall 2 integrated into one piece are cap structure, and the outside of lateral wall 2 bottom is opened flutedly 3, and the outside of top cap 1 top is opened has exterior angle 4.
The protective cap 5 is a small PVC small part and is mainly used for physically isolating a positive bus copper plate and a negative bus copper plate 9 of a direct-current capacitor assembly of the intermediate-frequency system power cabinet.
The protective cap 5 is made of polytetrafluoroethylene material by fine machining.
The inner diameter of the side wall 2 is phi 11 +/-0.1 mm;
the width of the groove 3 is 5 mm;
the height of the protective cap 5 is 15 mm;
the height of the groove 3 is 2 mm;
the depth of the inner hole of the protective cap 5 is 10 mm.
As shown in fig. 2, the protective cap 5 is a special frequency converter direct current capacitor assembly external part, the size of an inner cavity is matched with a special capacitor wiring bolt 8 tightly through machining, the protective cap 5 is installed in the middle of a positive bus copper plate 6, an insulating plate 7 and the capacitor wiring bolt 8, the capacitor wiring bolt 8 is completely physically isolated and sealed through slight pressing, 36 direct current capacitor assemblies are additionally installed in each group, and the direct current capacitor assemblies are tightly connected with the capacitor wiring bolt 8 through tetrafluoroethylene insulation and flexible hardness, so that the phenomenon of slipping and falling off in the operation process is avoided.
In the prior art, the capacitor assembly is disassembled on site, and the reason for causing the discharge burnout is analyzed and found to be accumulated dust, so that the hidden danger is solved. If a professional maintenance and transformation plan is taken, the on-site transformation and upgrading cost of the 300E frequency converter is huge, the investment cost is low, and the hidden danger is avoided.
Because the material selection requirement of the field working environment needs to meet the requirements of insulation and temperature change, the polytetrafluoroethylene rod has the advantages of high temperature resistance (the working temperature reaches 250 ℃), good mechanical toughness, corrosion resistance, no toxicity, higher breakdown voltage, volume resistivity and arc resistance, excellent electrical performance and accordance with the field process requirement.
According to the early test result, the working process of the 300E frequency converter is maintained and repaired in a small scale by using a year plan, all the capacitor wiring bolts 8 of the direct current capacitor assembly of the 300E special frequency converter power cabinet are improved, and the static protective cap 5 is additionally arranged, the load is transferred with load, the power is shut down and cut off, the protective baffle is removed, the direct current capacitor assembly is cleaned and dedusted, the insulating cap is additionally arranged (12 in each phase and 36 in three phases), the isolating baffle is arranged, the function test is carried out, the no-load check is carried out, and the operation with load is carried out.
After more than one year of on-load operation, no similar faults occur so far, the expected effect is achieved, equipment damage caused by breakdown discharge after the static dust of the positive electrode and the negative electrode of the direct current capacitor assembly is accumulated is avoided, then 3000 insulation pad finished products are all processed in batches, 2808 insulation pads are all installed at the time of working tasks of scheduled maintenance of the frequency converter every year, and the rest insulation pads are used as spare products to be repaired at any time.
The present invention has been described in detail with reference to the drawings and examples, but the present invention is not limited to the examples, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention. The prior art can be adopted in the content which is not described in detail in the invention.
Claims (8)
1. The utility model provides an insulating helmet of keeping apart of intermediate frequency converter direct current capacitance subassembly which characterized in that: the protective cap comprises a top cover (1), a side wall (2), a groove (3) and an outer corner (4);
wherein top cap (1) and lateral wall (2) integrated into one piece, top cap (1) are connected at the top of lateral wall (2), and open outside of lateral wall (2) bottom has recess (3), and open outside top cap (1) top has exterior angle (4).
2. The insulation isolation protective cap of the direct current capacitor assembly of the intermediate frequency converter according to claim 1, characterized in that: the top cover (1) and the side wall (2) are made of polytetrafluoroethylene materials.
3. The insulation isolation protective cap of the direct current capacitor assembly of the intermediate frequency converter according to claim 2, characterized in that: the inner diameter of the side wall (2) is 11 mm.
4. The insulation isolation protective cap of the direct current capacitor assembly of the intermediate frequency converter according to claim 3, characterized in that: the width of the groove (3) is 5 mm.
5. The insulation isolation protective cap of the direct current capacitor assembly of the intermediate frequency converter according to claim 4, characterized in that: the height of the groove (3) is 2 mm.
6. The insulation isolation protective cap of the direct current capacitor assembly of the intermediate frequency converter according to claim 5, characterized in that: the thickness of the top cover (1) is 5 mm.
7. The insulation isolation protective cap of the direct current capacitor assembly of the intermediate frequency converter according to claim 6, characterized in that: the height of the protective cap (5) is 15 mm.
8. The insulation isolation protective cap of the direct current capacitor assembly of the intermediate frequency converter according to claim 7, characterized in that: the protective cap (5) physically isolates and seals the capacitor wiring bolt (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011593974.7A CN112600392A (en) | 2020-12-29 | 2020-12-29 | Insulating isolation protective cap of direct current capacitor assembly of intermediate frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011593974.7A CN112600392A (en) | 2020-12-29 | 2020-12-29 | Insulating isolation protective cap of direct current capacitor assembly of intermediate frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112600392A true CN112600392A (en) | 2021-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011593974.7A Pending CN112600392A (en) | 2020-12-29 | 2020-12-29 | Insulating isolation protective cap of direct current capacitor assembly of intermediate frequency converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113284854A (en) * | 2021-06-17 | 2021-08-20 | 中国铁道科学研究院集团有限公司 | IGBT module and reinforced insulation protection device thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4082980A (en) * | 1975-02-13 | 1978-04-04 | Murata Manufacturing Co., Ltd. | Spark plug cap providing a capacitor in parallel with the spark cap |
| CN203026368U (en) * | 2012-12-06 | 2013-06-26 | 来恩伟业(鹤壁)电子科技有限责任公司 | Power filtering capacitor with explosion-proof device |
| CN203260467U (en) * | 2013-03-15 | 2013-10-30 | 无锡宸瑞新能源科技有限公司 | Novel capacitor structure with positioning sleeve |
| TWM491935U (en) * | 2014-09-19 | 2014-12-11 | Yuhchang Electric Co Ltd | Insulation bushing improvement structure for oil capacitor |
| CN205140751U (en) * | 2015-11-28 | 2016-04-06 | 浙江锦能电力科技有限公司 | Split type intelligent condenser |
| CN205140752U (en) * | 2015-12-09 | 2016-04-06 | 广东顺容电气有限公司 | Binding post for condenser |
| CN205828142U (en) * | 2016-05-31 | 2016-12-21 | 上能电气股份有限公司 | A kind of insulation system for inverter bus capacitor assembly |
-
2020
- 2020-12-29 CN CN202011593974.7A patent/CN112600392A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4082980A (en) * | 1975-02-13 | 1978-04-04 | Murata Manufacturing Co., Ltd. | Spark plug cap providing a capacitor in parallel with the spark cap |
| CN203026368U (en) * | 2012-12-06 | 2013-06-26 | 来恩伟业(鹤壁)电子科技有限责任公司 | Power filtering capacitor with explosion-proof device |
| CN203260467U (en) * | 2013-03-15 | 2013-10-30 | 无锡宸瑞新能源科技有限公司 | Novel capacitor structure with positioning sleeve |
| TWM491935U (en) * | 2014-09-19 | 2014-12-11 | Yuhchang Electric Co Ltd | Insulation bushing improvement structure for oil capacitor |
| CN205140751U (en) * | 2015-11-28 | 2016-04-06 | 浙江锦能电力科技有限公司 | Split type intelligent condenser |
| CN205140752U (en) * | 2015-12-09 | 2016-04-06 | 广东顺容电气有限公司 | Binding post for condenser |
| CN205828142U (en) * | 2016-05-31 | 2016-12-21 | 上能电气股份有限公司 | A kind of insulation system for inverter bus capacitor assembly |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113284854A (en) * | 2021-06-17 | 2021-08-20 | 中国铁道科学研究院集团有限公司 | IGBT module and reinforced insulation protection device thereof |
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Application publication date: 20210402 |
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