CN111048269A - High-pressure water-cooling metal pipe resistor - Google Patents
High-pressure water-cooling metal pipe resistor Download PDFInfo
- Publication number
- CN111048269A CN111048269A CN201911398740.4A CN201911398740A CN111048269A CN 111048269 A CN111048269 A CN 111048269A CN 201911398740 A CN201911398740 A CN 201911398740A CN 111048269 A CN111048269 A CN 111048269A
- Authority
- CN
- China
- Prior art keywords
- shell
- silica gel
- gel sleeve
- resistance wire
- plug
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 22
- 239000002184 metal Substances 0.000 title claims abstract description 22
- 238000001816 cooling Methods 0.000 title claims abstract description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000000741 silica gel Substances 0.000 claims abstract description 38
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 38
- 239000003822 epoxy resin Substances 0.000 claims abstract description 27
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 27
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000007789 sealing Methods 0.000 claims abstract description 24
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 18
- 239000000843 powder Substances 0.000 claims abstract description 18
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 11
- 230000007704 transition Effects 0.000 claims description 6
- 238000001746 injection moulding Methods 0.000 claims description 3
- 238000005538 encapsulation Methods 0.000 abstract description 3
- 238000001125 extrusion Methods 0.000 abstract description 2
- 238000007711 solidification Methods 0.000 abstract description 2
- 230000008023 solidification Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012858 packaging process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/02—Housing; Enclosing; Embedding; Filling the housing or enclosure
- H01C1/028—Housing; Enclosing; Embedding; Filling the housing or enclosure the resistive element being embedded in insulation with outer enclosing sheath
- H01C1/03—Housing; Enclosing; Embedding; Filling the housing or enclosure the resistive element being embedded in insulation with outer enclosing sheath with powdered insulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/08—Cooling, heating or ventilating arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C3/00—Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven or formed as grids
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Details Of Resistors (AREA)
Abstract
The invention relates to a high-pressure water-cooling metal tube resistor which comprises a shell, a resistance wire, magnesium oxide powder, a leading-out terminal and an insulating plug, wherein a soft silica gel sleeve is sleeved inside the shell, the outer wall of the silica gel sleeve is attached to the inner wall of the shell, the resistance wire penetrates through the silica gel sleeve, and the magnesium oxide powder is filled inside the silica gel sleeve so as to fix the resistance wire. The end part of the silica gel sleeve is encapsulated with an epoxy resin inner sealing layer, so that the magnesium oxide powder is encapsulated in the silica gel sleeve. The end part of the plug is a conical part with the outer diameter gradually reduced, the conical part is inserted into the end part of the shell, an excess cavity is enclosed between the outer side of the conical part and the inner wall of the shell, and the epoxy resin inner sealing layer is partially overflowed to the filling excess cavity under the extrusion of the conical part. The inner end of the leading-out terminal is inserted into the silica gel sleeve and connected with the resistance wire, and the outer end of the leading-out terminal extends out of the shell. The resistor has the advantages of good sealing performance, good insulating performance, high voltage resistance and simple operation, saves the time of encapsulation and solidification, and can be used in severe environment.
Description
Technical Field
The invention relates to the technical field of resistors, in particular to a high-voltage water-cooling metal tube resistor.
Background
The two ends of the existing water-cooling metal pipe resistor are filled and sealed by epoxy resin to improve the insulating property of the resistor, and due to the characteristics of the epoxy resin, the resistor can be cured only after being placed for a long time after being filled and sealed, and the next processing procedure can be carried out. In order to reduce the curing time, heating is generally used to accelerate the curing, but the process is complicated, and the heating can cause bubbles to be generated in the encapsulated metal tube, thereby affecting the insulating property.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides the high-voltage water-cooling metal tube resistor which is improved in manufacturing efficiency and good in insulating property.
In order to achieve the purpose, the invention provides the following technical scheme:
the high-pressure water-cooling metal tube resistor comprises a shell, a resistance wire, magnesium oxide powder, a leading-out terminal and an insulating plug, wherein the shell is of a tubular structure made of metal, a soft silica gel sleeve is sleeved inside the shell, the outer wall of the silica gel sleeve is attached to the inner wall of the shell, the resistance wire penetrates through the silica gel sleeve, the magnesium oxide powder is filled inside the silica gel sleeve to fix the resistance wire, and an epoxy resin inner sealing layer is filled and sealed at the end part of the silica gel sleeve to seal the magnesium oxide powder in the silica gel sleeve; the end part of the plug is a conical part with the outer diameter gradually reduced, the conical part is inserted into the end part of the shell, a surplus cavity is defined between the outer side of the conical part and the inner wall of the shell, and the epoxy resin inner sealing layer is extruded by the conical part and partially overflows to fill the surplus cavity; the inner end of the leading-out terminal is inserted into the silica gel sleeve and connected with the resistance wire, and the outer end of the leading-out terminal penetrates through the epoxy resin inner sealing layer and the plug and extends out of the shell.
Specifically, a knurled bolt is arranged between the plug and the leading-out terminal.
Specifically, the plug comprises a cylindrical body part which is integrated with the conical part, a transition step is arranged between the body part and the conical part, the transition step is abutted against the end part of the shell, and the outer wall of the body part is flush with the outer wall of the shell.
Specifically, the plug is of a structure formed by injection molding of epoxy resin.
Specifically, the resistance wire is located at the center of the housing.
The invention has the beneficial effects that:
according to the high-pressure water-cooling metal pipe resistor, the two ends of the shell are packaged by the plugs, the next process can be carried out without waiting for the complete solidification of the encapsulated epoxy resin inner sealing layer, the production is convenient, the processing time is saved, the manufacturing efficiency is improved, and the cost is reduced; when the plug is inserted, an excess cavity is enclosed between the outer side of the conical part and the inner wall of the shell, and the epoxy resin inner sealing layer is extruded by the conical part and partially overflows to the filling excess cavity, so that the uncured epoxy resin inner sealing layer can be prevented from being extruded to overflow to the shell.
Drawings
Fig. 1 is a schematic structural diagram of a high-voltage water-cooled metal tube resistor in an embodiment.
Fig. 2 is a partially enlarged view of the high-pressure water-cooled metal tube resistor in the embodiment.
Fig. 3 is an enlarged perspective view of the plug in the embodiment.
Reference numerals:
the device comprises a shell 1, a resistance wire 2, magnesium oxide powder 3 and an extraction terminal 4;
the plug 5, the tapered part 51, the body part 52, the transition step 53 and the surplus cavity 54;
silica gel sleeve 6, epoxy resin inner sealing layer 7, annular knurl bolt 8.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments and the accompanying drawings.
The high-voltage water-cooling metal tube resistor of the embodiment is shown in fig. 1 to 3, and includes a housing 1, a resistance wire 2, magnesium oxide powder 3, a leading-out terminal 4 and an insulating plug 5, where the housing 1 is a tubular structure made of metal, a soft silica gel sleeve 6 is sleeved inside the housing 1, an outer wall of the silica gel sleeve 6 is attached to an inner wall of the housing 1, and a length of the silica gel sleeve 6 is smaller than a length of the housing 1. Resistance wire 2 wears the center department in silica gel sleeve 6, and the filling of magnesia powder 3 is inside silica gel sleeve 6 to fixed resistance wire 2 because resistance wire 2 is wrapped by magnesia powder 3 and silica gel sleeve 6, separates with shell 1, consequently can dispel the heat the cooling through the water-cooling mode to shell 1 among the practical application. The end of the silica gel sleeve 6 is encapsulated with an epoxy resin inner sealing layer 7, so that the magnesia powder 3 is encapsulated in the silica gel sleeve 6. The end part of the plug 5 is a tapered part 51 with gradually reduced outer diameter, the tapered part 51 is inserted into the end part of the shell 1, a surplus cavity 54 is defined between the outer side of the tapered part 51 and the inner wall of the shell 1, and the epoxy resin inner sealing layer 7 is partially overflowed to fill the surplus cavity 54 under the extrusion of the tapered part 51. The inner end of the leading-out terminal 4 is inserted into the silica gel sleeve 6 to be connected with the resistance wire 2, and the outer end of the leading-out terminal 4 penetrates through the epoxy resin inner sealing layer 7 and the plug 5 to extend out of the shell 1. In this embodiment, a knurled bolt 8 is arranged between the plug 5 and the leading-out terminal 4, so that the plug 5 and the leading-out terminal 4 are fixed to each other. The plug 5 comprises a cylindrical body 52 integrated with the conical part 51, a transition step 53 is arranged between the body 52 and the conical part 51, the transition step 53 abuts against the end of the housing 1, and the outer wall of the body 52 and the outer wall of the housing 1 are flush with each other, so that on one hand, the surplus cavity 54 is sealed, and on the other hand, the overall structure is more compact. The plug 5 is of an epoxy resin injection molding structure, and the plug 5 and the epoxy resin inner sealing layer 7 are made of the same material, so that the plug and the epoxy resin inner sealing layer can be better fused with each other, and the sealing performance is enhanced.
When the resistance wire is manufactured, firstly, the silica gel sleeve 6 is arranged in the shell 1, and two ends of the resistance wire 2 are wound on the leading-out terminal 4 and are arranged in the silica gel sleeve 6; then, filling magnesia powder 3 in the silica gel sleeve 6, wherein the height of the magnesia powder 3 is lower than that of the silica gel sleeve 6, compacting the magnesia powder 3 in the silica gel sleeve 6 by adopting a pipe reducing mode for the shell 1 (the pipe reducing mode is that the diameter of the shell 1 is reduced and the magnesia powder 3 is compacted by lengthening the shell 1), and playing a role in fixing the resistance wire 2 and the leading-out terminal 4; the two ends of the shell 1 are filled with a proper amount of epoxy resin inner sealing layers 7 which are still in a hot-melting uncured state, the knurled bolt 8 is embedded into the plug 5, the knurled bolt 8 is directly screwed into the leading-out terminal 4 to be fixed, and meanwhile, the conical parts 51 of the plug 5 are inserted into the two ends of the shell 1 to be sealed.
The high-pressure water-cooling metal pipe resistor of this embodiment has following advantage:
1. the silica gel sleeve 6 is arranged on the inner wall of the shell 1, so that the voltage resistance is enhanced, and the problem that the traditional resistor is insufficient in voltage resistance is solved; meanwhile, the silica gel sleeve 6 is soft, so that the shrinkage pipe of the shell 1 is not influenced in the manufacturing process, and the voltage-resistant and insulating performance of the resistor can be ensured;
2. the two ends of the shell 1 are packaged by the plugs 5, so that the production is convenient, the processing time is saved, the manufacturing efficiency is improved, and the cost is reduced; the plug 5 not only can play a role in sealing, but also has the function of increasing the pressure resistance, so that the creepage distance between the leading-out terminal 4 and the shell 1 is increased;
3. the epoxy resin plug 5 can be independently processed, a knurled nut is embedded in the epoxy resin plug, the structure is simple, the operation is convenient, and the mass production is easy to realize;
4. in the prior art, the end part of the shell adopts a direct encapsulation process, bubbles are easy to appear in the encapsulation process, and the phenomenon of incomplete filling is caused, and if the phenomenon occurs, the whole metal tube resistor needs to be scrapped. In the embodiment, the problem can be avoided by adopting the single plug 5, so that the cost is saved;
5. the part of the plug 5 inserted into the shell 1 is designed with a taper part 51, which can contain the epoxy resin inner sealing layer 7 for sealing in the packaging process, so that the epoxy resin inner sealing layer 7 is not easy to overflow.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (5)
1. A high-pressure water-cooling metal pipe resistor is characterized in that: the resistance wire comprises a shell, a resistance wire, magnesium oxide powder, a leading-out terminal and an insulating plug, wherein the shell is of a tubular structure made of metal, a soft silica gel sleeve is sleeved inside the shell, the outer wall of the silica gel sleeve is attached to the inner wall of the shell, the resistance wire penetrates through the silica gel sleeve, the magnesium oxide powder is filled inside the silica gel sleeve so as to fix the resistance wire, and an epoxy resin inner sealing layer is filled at the end part of the silica gel sleeve so as to seal the magnesium oxide powder in the silica gel sleeve; the end part of the plug is a conical part with the outer diameter gradually reduced, the conical part is inserted into the end part of the shell, a surplus cavity is defined between the outer side of the conical part and the inner wall of the shell, and the epoxy resin inner sealing layer is extruded by the conical part and partially overflows to fill the surplus cavity; the inner end of the leading-out terminal is inserted into the silica gel sleeve and connected with the resistance wire, and the outer end of the leading-out terminal penetrates through the epoxy resin inner sealing layer and the plug and extends out of the shell.
2. The high-pressure water-cooled metal tube resistor as claimed in claim 1, wherein: and a knurled bolt is arranged between the plug and the leading-out terminal.
3. The high-pressure water-cooled metal tube resistor as claimed in claim 1, wherein: the plug comprises a cylindrical body part which is integrated with the conical part, a transition step is arranged between the body part and the conical part and props against the end part of the shell, and the outer wall of the body part is flush with the outer wall of the shell.
4. The high-pressure water-cooled metal tube resistor as claimed in claim 1, wherein: the plug is of a structure formed by injection molding of epoxy resin.
5. The high-pressure water-cooled metal tube resistor as claimed in claim 1, wherein: the resistance wire is located at the center of the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911398740.4A CN111048269B (en) | 2019-12-30 | 2019-12-30 | High-voltage water-cooled metal tube resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911398740.4A CN111048269B (en) | 2019-12-30 | 2019-12-30 | High-voltage water-cooled metal tube resistor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111048269A true CN111048269A (en) | 2020-04-21 |
| CN111048269B CN111048269B (en) | 2024-10-18 |
Family
ID=70241919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911398740.4A Active CN111048269B (en) | 2019-12-30 | 2019-12-30 | High-voltage water-cooled metal tube resistor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111048269B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117153509A (en) * | 2023-10-18 | 2023-12-01 | 深圳市正阳兴电子科技有限公司 | Processing method of grid type high-power metal resistor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200428418A (en) * | 2003-06-03 | 2004-12-16 | Kouken Company Ltd | High-voltage resistor element |
| US20090090705A1 (en) * | 2007-10-05 | 2009-04-09 | Yuki Okumura | Glow plug and manufacturing method of the same |
| CN109509597A (en) * | 2018-11-30 | 2019-03-22 | 湖南福德电气有限公司 | A kind of bimetallic tube resistor |
| CN209515354U (en) * | 2018-06-29 | 2019-10-18 | 株洲福德轨道交通研究院有限公司 | A kind of metal tube resistor |
| CN211604826U (en) * | 2019-12-30 | 2020-09-29 | 广东福德电子有限公司 | High-pressure water-cooling metal pipe resistor |
-
2019
- 2019-12-30 CN CN201911398740.4A patent/CN111048269B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200428418A (en) * | 2003-06-03 | 2004-12-16 | Kouken Company Ltd | High-voltage resistor element |
| US20090090705A1 (en) * | 2007-10-05 | 2009-04-09 | Yuki Okumura | Glow plug and manufacturing method of the same |
| CN209515354U (en) * | 2018-06-29 | 2019-10-18 | 株洲福德轨道交通研究院有限公司 | A kind of metal tube resistor |
| CN109509597A (en) * | 2018-11-30 | 2019-03-22 | 湖南福德电气有限公司 | A kind of bimetallic tube resistor |
| CN211604826U (en) * | 2019-12-30 | 2020-09-29 | 广东福德电子有限公司 | High-pressure water-cooling metal pipe resistor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117153509A (en) * | 2023-10-18 | 2023-12-01 | 深圳市正阳兴电子科技有限公司 | Processing method of grid type high-power metal resistor |
| CN117153509B (en) * | 2023-10-18 | 2024-04-26 | 深圳市正阳兴电子科技有限公司 | Processing method of grid type high-power metal resistor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111048269B (en) | 2024-10-18 |
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