CN110931187A - Preparation method of composite insulating pipe - Google Patents
Preparation method of composite insulating pipe Download PDFInfo
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- CN110931187A CN110931187A CN201911289796.6A CN201911289796A CN110931187A CN 110931187 A CN110931187 A CN 110931187A CN 201911289796 A CN201911289796 A CN 201911289796A CN 110931187 A CN110931187 A CN 110931187A
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- shrinkable tube
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B19/00—Apparatus or processes specially adapted for manufacturing insulators or insulating bodies
Abstract
The invention relates to a preparation method of a composite insulating tube, which comprises the following steps: step 1: sequentially coating a semi-conductive heat-shrinkable tube and an insulating heat-shrinkable tube on the inner conductor in a heat-shrinkable manner to form a semi-finished product of the composite insulating tube; step 2: putting the prepared composite insulating tube semi-finished product into a hot-pressing container, heating to 75-85 ℃ until the composite insulating tube semi-finished product is in a semi-molten state, introducing nitrogen, and gradually pressurizing to 0.8-1 MPa; and step 3: and after the pressure in the hot pressing container reaches the standard, heating the hot pressing container to 175-185 ℃, preserving the heat for 4-6min, and finally, keeping the pressure of 0.8-1Mpa for cooling until the temperature is reduced to the room temperature to obtain the finished product of the composite insulating tube. The invention has the advantages that: the process can effectively avoid the generation of bubbles among all layers of the composite insulating tube, thereby greatly improving the electrical property of the composite insulating tube.
Description
Technical Field
The invention relates to an insulating tube, in particular to a preparation method of a composite insulating tube.
Background
The applications of the electric wire and the electric cable are mainly divided into three main categories, namely an electric power system, an information transmission system, mechanical equipment and an instrument system. The electric wire and cable products are mainly divided into five major categories, namely bare wires and bare conductor products, electric power cables, electric wire and cables for electrical equipment, communication cables, optical fibers and electromagnetic wires. The power cable is mainly characterized in that the conductor is externally extruded (wound) with an insulating layer, such as an overhead insulated cable, or several-core twisted (corresponding to a phase line, a zero line and a ground wire of a power system), such as an overhead insulated cable with more than two cores, or a sheath layer is added, such as a plastic/rubber-sheathed wire cable.
However, the weather resistance and the anti-brittle-fracture performance of wires and cables in some industries are higher and higher, the common multifunctional cable adopts the conventional polyvinyl chloride, cross-linked polyolefin and other materials as the insulating and sheathing materials, and the insulating tube made of the materials has the defects of poor overall strength, poor weather resistance and the like. In order to solve the above problems, a semi-conductive heat-shrinkable tube is generally prepared by mixing EVA and carbon black, an EVA insulating layer is extruded on the outer surface of the semi-conductive heat-shrinkable tube through a viscous material, and finally drying is performed.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a preparation method of a composite insulating tube, which can avoid generating bubbles and improve the electrical property.
In order to solve the technical problems, the technical scheme of the invention is as follows: the preparation method of the composite insulating pipe has the innovation points that: the preparation method comprises the following steps:
step 1: a layer of semi-conductive heat shrink tube with the length consistent with that of the inner conductor is coated on the inner conductor in a heat shrink way;
step 2: at least one layer of insulating heat shrinkable tube with the length consistent with that of the inner conductor is coated on the semi-conductive heat shrinkable tube formed in the previous step in a heat shrinkage mode;
and step 3: a layer of semi-conductive heat shrinkable tube with a certain gradient difference between the length of the semi-conductive heat shrinkable tube and the length of the insulating heat shrinkable tube is coated on the outermost layer of the insulating heat shrinkable tube formed in the previous step in a heat shrinkage mode, and the length of the semi-conductive heat shrinkable tube is smaller than that of the insulating heat shrinkable tube;
and 4, step 4: at least one layer of insulating heat shrinkable tube with the length consistent with that of the inner conductor is coated on the semi-conductive heat shrinkable tube formed in the previous step in a heat shrinkage mode;
and 5: a layer of semi-conductive heat-shrinkable tube with the length having a certain gradient difference with the length of the upper semi-conductive heat-shrinkable tube is coated on the outermost layer of the insulation heat-shrinkable tube formed in the previous step in a heat-shrinkable manner, and the length of the semi-conductive heat-shrinkable tube is smaller than that of the upper semi-conductive heat-shrinkable tube;
step 6: repeating the step 4 and the step 5 for a plurality of times according to the product specification required by a customer, and finally, performing heat shrinkage on the outermost semi-conductive heat-shrinkable tube to coat a layer of insulating heat-shrinkable tube with the length consistent with that of the inner conductor to form a semi-finished product of the composite insulating tube;
and 7: putting the semi-finished product of the composite insulating pipe prepared in the step 6 into a hot-pressing container, heating to 75-85 ℃ until the semi-finished product of the composite insulating pipe is in a semi-molten state, introducing nitrogen, and gradually pressurizing to 0.8-1 MPa;
and 8: and after the pressure in the hot pressing container reaches the standard, heating the hot pressing container to 175-185 ℃, preserving the heat for 4-6min, and finally, keeping the pressure of 0.8-1Mpa for cooling until the temperature is reduced to the room temperature to obtain the finished product of the composite insulating tube.
Further, the thickness of the pipe wall of each semi-conductive heat shrinkable pipe is 0.5-1 mm.
Further, the total pipe wall thickness of the insulating heat shrinkable tube between two adjacent halves of the conductive heat shrinkable tube reaches 4 mm.
Furthermore, the hot-pressing container comprises an autoclave body, one end of the autoclave body is provided with a closed end, and the other end of the autoclave body is provided with a tank door which can be opened or closed;
the central part of the upper part of the autoclave body is provided with a motor, the output shaft of the motor is connected with a fan through a coupling, the air outlet of the fan is connected with an electric heater, one side of the electric heater, which is far away from the fan, is connected with a cooler, a partition board is arranged between the inner walls of the autoclave body below the cooler at a certain distance, and air guide pipes which penetrate through the partition board and are fixedly connected with the bottom surface of the autoclave body are arranged at the four end angles of the partition board; the upper end of each air guide pipe is provided with an opening, air outlet holes are uniformly distributed on the inner side wall of each air guide pipe, and the upper end opening of each air guide pipe is lower than the cooler;
the bottom of the autoclave body is provided with a supporting base, the bottom in the autoclave body is provided with a sliding base, and the sliding base is arranged between the air guide pipes; the sliding base is provided with a sliding carriage vehicle, and the sliding carriage vehicle is provided with a cover body which can be opened or closed; the upper portion of the autoclave body is provided with a pressure control valve communicated with the autoclave body, and the fan, the electric heater, the cooler and the pressure control valve are all electrically connected with the master controller.
Furthermore, the upper end opening of the air guide pipe is higher than the partition plate or is flush with the partition plate.
The invention has the advantages that:
(1) the preparation method of the composite insulating tube comprises the steps of preparing a semi-finished product of the composite insulating tube by a thermal shrinkage process, then conveying the semi-finished product of the composite insulating tube into a hot pressing container for hot pressing treatment, and in the hot pressing treatment process, slowly heating until the semi-finished product of the composite insulating tube is in a semi-molten state, and then heating to a high temperature, so that the condition that the initial temperature is too high, the components of the composite insulating tube are damaged, and the quality of a final product is influenced is avoided;
(2) according to the preparation method of the composite insulating pipe, in order to ensure the temperature uniformity in the effective space of the hot-pressing container, the air guide pipes are additionally arranged on the periphery of the inner part of the tank body of the hot-pressing tank, hot air on the upper part of the partition plate is sucked into the air guide pipes through the air guide pipes and then blown out to the cover body from the periphery through the air guide pipes on the periphery, and therefore the requirement of the temperature uniformity is met.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic structural view of the composite insulating pipe of the present invention.
FIG. 2 is a schematic structural diagram of a hot-pressed container in the method for manufacturing a composite insulating tube according to the present invention.
Fig. 3 is a schematic view showing a detailed structure of the separator in fig. 2.
Detailed Description
The following examples are presented to enable one of ordinary skill in the art to more fully understand the present invention and are not intended to limit the scope of the embodiments described herein.
Examples
The preparation method of the composite insulating tube in this embodiment takes a transformer bushing of 110kv as an example, as shown in fig. 1, and specifically includes the following steps:
step 1: and a layer of semi-conductive heat shrinkable tube 22 with the tube wall thickness of 0.5mm and the length consistent with the length of the inner conductor 21 is coated on the inner conductor 21 with the tube diameter of 72mm in a heat shrinkage way.
Step 2: and performing heat shrinkage on the semi-conductive heat shrinkable tube 22 formed in the previous step to coat two layers of insulating heat shrinkable tubes 23 with the length consistent with that of the inner conductor, and ensuring that the total wall thickness of the two layers of insulating heat shrinkable tubes 23 reaches 4 mm.
And step 3: and a layer of semi-conductive heat shrinkable tube 22 with the tube wall thickness of 0.5mm and the gradient difference of 50mm between the length of the insulating heat shrinkable tube 23 is coated on the outermost layer of insulating heat shrinkable tube 23 formed in the previous step in a heat shrinkage mode, and the length of the semi-conductive heat shrinkable tube 22 is smaller than that of the insulating heat shrinkable tube 23.
And 4, step 4: and performing heat shrinkage on the semi-conductive heat shrinkable tube 22 formed in the previous step to coat two layers of insulating heat shrinkable tubes 23 with the length consistent with that of the inner conductor, and ensuring that the total wall thickness of the two layers of insulating heat shrinkable tubes 23 reaches 4 mm.
And 5: and a layer of semi-conductive heat shrinkable tube 22 with the gradient difference of 50mm is coated on the outermost layer of the insulation heat shrinkable tube 23 formed in the previous step in a heat shrinkage mode, and the length of the semi-conductive heat shrinkable tube 22 is smaller than that of the upper layer of the semi-conductive heat shrinkable tube 22.
Step 6: and (4) repeating the step (4) and the step (5) twice according to the product specification required by a customer to obtain 4 layers of the semi-conductive heat-shrinkable tube (22), and finally, performing heat shrinkage on the outermost layer of the semi-conductive heat-shrinkable tube (22) to coat a layer of insulating heat-shrinkable tube with the length consistent with the length of the inner conductor and the thickness of 4mm to form a semi-finished product of the composite insulating tube.
And 7: and (3) putting the semi-finished product of the composite insulating tube prepared in the step (6) into an autoclave, wherein the autoclave comprises an autoclave body 1 as shown in figure 2, one end of the autoclave body 1 is provided with a closed end 2, and the other end of the autoclave body 1 is provided with a tank door 15 which can be opened or closed.
The center of the upper part of the autoclave body 1 is provided with a motor 4, the output shaft of the motor 4 is connected with a fan 5 through a coupling, the air outlet of the fan 5 is connected with an electric heater 6, one side of the electric heater 6, which is far away from the fan 5, is connected with a cooler 7, a partition plate 3 is arranged between the inner walls of the autoclave body 1 below the cooler 7 by a certain distance, and air guide pipes 12 which penetrate through the partition plate 3 and the lower end of which is fixedly connected with the bottom surface of the autoclave body 1 are arranged at the four end angles of the partition plate 3; the upper end of each air guide pipe 12 is provided with an opening, air outlet holes 13 are uniformly distributed on the inner side wall of each air guide pipe 12, the upper end opening of each air guide pipe 12 is lower than the cooler 7, and the upper end opening of each air guide pipe 12 is flush with the partition plate 3.
The bottom of the autoclave body 1 is provided with a supporting base 8, the bottom in the autoclave body 1 is provided with a sliding base 9, and the sliding base 9 is arranged between the air guide pipes 12; a sliding carriage vehicle 10 is arranged on the sliding base 9, and a cover body 11 which can be opened or closed is arranged on the sliding carriage vehicle 10; the upper part of the autoclave body 1 is provided with a pressure control valve 14 communicated with the autoclave body 1, and the fan 5, the electric heater 6, the cooler 7 and the pressure control valve 14 are all electrically connected with a master controller 16.
Putting a semi-finished product of a composite insulating pipe to be molded by a hot-pressing container in a cover body 11, fixing the semi-finished product on a sliding frame vehicle 10, pushing the sliding frame vehicle 10 into a hot-pressing tank body 1 in a sliding manner, closing a tank door 15, adjusting a master controller 16 by a worker, controlling a fan 5, an electric heater 6, a cooler 7 and a pressure control valve 14, sequentially realizing the processes of heating, pressurizing, heat preservation and cooling, particularly,
heating to 75-85 deg.C until the semi-finished product of the composite insulating tube is in semi-molten state, introducing nitrogen gas, and gradually pressurizing to 0.8-1 MPa.
And 8: and after the pressure in the hot pressing container reaches the standard, heating the hot pressing container to 175-185 ℃, preserving the heat for 4-6min, and finally, keeping the pressure of 0.8-1Mpa for cooling until the temperature is reduced to the room temperature to obtain the finished product of the composite insulating tube.
Comparative example
The preparation method of the composite insulating tube in the comparative example takes a transformer bushing of 110kv as an example, and specifically comprises the following steps:
step 1: winding the belt: firstly, taking a metal tube type conductor with the pipe diameter of 72mm, wherein one end of the conductor is provided with a grease injection port, the other end of the conductor is provided with an exhaust port, a plurality of layers of glass fiber cloth belts and semiconductor conformal materials are wound on the surface of the conductor, and the glass fiber cloth belts and the semiconductor conformal materials are wound in a staggered manner;
step 2: sleeving: sleeving a heat-shrinkable sleeve on the outer side wall of the conductor wound with the cloth belt, and then vacuumizing the space between the heat-shrinkable sleeve and the conductor to enable the heat-shrinkable sleeve to be tightly attached to the outer side wall of the conductor;
and step 3: injecting grease: under the vacuum condition that the vacuum degree is-90 to-100 KPa, pouring epoxy resin into the cavity between the heat-shrinkable sleeve and the conductor from the grease-pouring port on the conductor until the resin is full;
and 4, step 4: and (3) curing, namely curing the epoxy resin, and discharging redundant epoxy resin and gas between the heat-shrinkable sleeve and the conductor in the curing process.
The finished composite insulating pipe prepared in the examples and the comparative examples are subjected to electrical property tests, and the test results are shown in the following table:
| 110kv transformer bushing | Comparative example | Examples |
| Partial discharge | 10pC | 3pC |
| Power frequency withstand voltage | 230kV | 276kV |
| Dielectric loss | 0.007 | 0.003 |
| Lightning impulse | 550 kV | 660 kV |
From the above table, it can be seen that the electrical performance of the composite insulating tube prepared by the preparation method of the composite insulating tube is superior to that of the composite insulating tube prepared by the traditional preparation method.
The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. A preparation method of a composite insulating tube is characterized by comprising the following steps: the preparation method comprises the following steps:
step 1: a layer of semi-conductive heat shrink tube with the length consistent with that of the inner conductor is coated on the inner conductor in a heat shrink way;
step 2: at least one layer of insulating heat shrinkable tube with the length consistent with that of the inner conductor is coated on the semi-conductive heat shrinkable tube formed in the previous step in a heat shrinkage mode;
and step 3: a layer of semi-conductive heat shrinkable tube with a certain gradient difference between the length of the semi-conductive heat shrinkable tube and the length of the insulating heat shrinkable tube is coated on the outermost layer of the insulating heat shrinkable tube formed in the previous step in a heat shrinkage mode, and the length of the semi-conductive heat shrinkable tube is smaller than that of the insulating heat shrinkable tube;
and 4, step 4: at least one layer of insulating heat shrinkable tube with the length consistent with that of the inner conductor is coated on the semi-conductive heat shrinkable tube formed in the previous step in a heat shrinkage mode;
and 5: a layer of semi-conductive heat-shrinkable tube with the length having a certain gradient difference with the length of the upper semi-conductive heat-shrinkable tube is coated on the outermost layer of the insulation heat-shrinkable tube formed in the previous step in a heat-shrinkable manner, and the length of the semi-conductive heat-shrinkable tube is smaller than that of the upper semi-conductive heat-shrinkable tube;
step 6: repeating the step 4 and the step 5 for a plurality of times according to the product specification required by a customer, and finally, performing heat shrinkage on the outermost semi-conductive heat-shrinkable tube to coat a layer of insulating heat-shrinkable tube with the length consistent with that of the inner conductor to form a semi-finished product of the composite insulating tube;
and 7: putting the semi-finished product of the composite insulating pipe prepared in the step 6 into a hot-pressing container, heating to 75-85 ℃ until the semi-finished product of the composite insulating pipe is in a semi-molten state, introducing nitrogen, and gradually pressurizing to 0.8-1 MPa;
and 8: and after the pressure in the hot pressing container reaches the standard, heating the hot pressing container to 175-185 ℃, preserving the heat for 4-6min, and finally, keeping the pressure of 0.8-1Mpa for cooling until the temperature is reduced to the room temperature to obtain the finished product of the composite insulating tube.
2. The method for preparing a composite insulating tube according to claim 1, wherein: the thickness of the pipe wall of each semi-conductive heat shrinkable pipe is 0.5-1 mm.
3. The method for preparing a composite insulating tube according to claim 1, wherein: the total pipe wall thickness of the insulating heat shrinkable tube between two adjacent half conductive heat shrinkable tubes reaches 4 mm.
4. The method of manufacturing a composite insulating tube according to claim 1, 2 or 3, characterized in that: the hot-pressing container comprises a hot-pressing tank body, one end of the hot-pressing tank body is provided with a closed end, and the other end of the hot-pressing tank body is provided with a tank door which can be opened or closed;
the central part of the upper part of the autoclave body is provided with a motor, the output shaft of the motor is connected with a fan through a coupling, the air outlet of the fan is connected with an electric heater, one side of the electric heater, which is far away from the fan, is connected with a cooler, a partition board is arranged between the inner walls of the autoclave body below the cooler at a certain distance, and air guide pipes which penetrate through the partition board and are fixedly connected with the bottom surface of the autoclave body are arranged at the four end angles of the partition board; the upper end of each air guide pipe is provided with an opening, air outlet holes are uniformly distributed on the inner side wall of each air guide pipe, and the upper end opening of each air guide pipe is lower than the cooler;
the bottom of the autoclave body is provided with a supporting base, the bottom in the autoclave body is provided with a sliding base, and the sliding base is arranged between the air guide pipes; the sliding base is provided with a sliding carriage vehicle, and the sliding carriage vehicle is provided with a cover body which can be opened or closed; the upper portion of the autoclave body is provided with a pressure control valve communicated with the autoclave body, and the fan, the electric heater, the cooler and the pressure control valve are all electrically connected with the master controller.
5. The method for preparing a composite insulating tube according to claim 4, wherein: the upper end opening of the air guide pipe is higher than the clapboard or is arranged flush with the clapboard.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911289796.6A CN110931187B (en) | 2019-12-16 | 2019-12-16 | Preparation method of composite insulating pipe |
| CN202110899490.3A CN113764144A (en) | 2019-12-16 | 2019-12-16 | Hot pressing container for preparing composite insulating pipe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911289796.6A CN110931187B (en) | 2019-12-16 | 2019-12-16 | Preparation method of composite insulating pipe |
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| CN202110899490.3A Division CN113764144A (en) | 2019-12-16 | 2019-12-16 | Hot pressing container for preparing composite insulating pipe |
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| CN110931187A true CN110931187A (en) | 2020-03-27 |
| CN110931187B CN110931187B (en) | 2021-10-15 |
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| CN202110899490.3A Pending CN113764144A (en) | 2019-12-16 | 2019-12-16 | Hot pressing container for preparing composite insulating pipe |
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| CN117681466B (en) * | 2024-02-04 | 2024-04-05 | 烟台朗弗新材料有限公司 | Curing device for processing carbon fiber products |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4637540Y1 (en) * | 1969-06-03 | 1971-12-25 | ||
| CN102496423A (en) * | 2011-11-29 | 2012-06-13 | 安庆市三阳塑胶材料有限公司 | Production method of polymer composite power bus bar or bus tube |
| CN102760542A (en) * | 2012-07-12 | 2012-10-31 | 长园集团股份有限公司 | Three-layer thermal shrinkage composite tube |
| CN104900334A (en) * | 2015-05-08 | 2015-09-09 | 大连联合高分子材料有限公司 | 10-35kv insulating tubular bus and manufacturing method thereof |
| CN105825914A (en) * | 2016-01-27 | 2016-08-03 | 苏州翠南电子科技有限公司 | Novel composite silicone rubber solid insulation bus |
| CN111283997A (en) * | 2019-12-16 | 2020-06-16 | 江苏沃能电气科技有限公司 | Production process of composite insulating pipe |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2565771Y (en) * | 2002-07-12 | 2003-08-13 | 北京航空材料研究院 | Large hot-press tank |
| DE502004009974D1 (en) * | 2004-11-16 | 2009-10-08 | Abb Schweiz Ag | High voltage circuit breaker with cooling |
| CN201677443U (en) * | 2010-05-14 | 2010-12-22 | 王新志 | Temperature-regulating autoclave with natural circulation |
| CN102789836B (en) * | 2011-05-20 | 2014-04-23 | 泰科电子(上海)有限公司 | Insulated conduit bus and manufacturing method thereof |
| KR101344950B1 (en) * | 2013-04-30 | 2013-12-27 | (주)일신오토클레이브 | Autoclave including motor direct-coupled air cooling type magnetic-drive |
| CN206834007U (en) * | 2017-06-23 | 2018-01-02 | 苏州九维电气制造有限公司 | A kind of new heat-shrink tube |
| CN107452439A (en) * | 2017-07-12 | 2017-12-08 | 西安理工大学 | A kind of compound insulation sleeve high voltage bus and its manufacture method |
| CN107464610A (en) * | 2017-09-22 | 2017-12-12 | 安费诺电子装配（厦门）有限公司 | A kind of parallel conductor layout |
| CN108297525A (en) * | 2018-01-23 | 2018-07-20 | 王新志 | A kind of longitudinal cycle autoclave of peripheral hardware cold and heat circulating device |
| CN208343496U (en) * | 2018-05-18 | 2019-01-08 | 诸城市鲁贯通机械科技有限公司 | A kind of industrial autoclave |
| CN109307408A (en) * | 2018-11-27 | 2019-02-05 | 开平市红火卫浴有限公司 | A kind of Hardware fitting drying unit |
-
2019
- 2019-12-16 CN CN201911289796.6A patent/CN110931187B/en active Active
- 2019-12-16 CN CN202110899490.3A patent/CN113764144A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4637540Y1 (en) * | 1969-06-03 | 1971-12-25 | ||
| CN102496423A (en) * | 2011-11-29 | 2012-06-13 | 安庆市三阳塑胶材料有限公司 | Production method of polymer composite power bus bar or bus tube |
| CN102760542A (en) * | 2012-07-12 | 2012-10-31 | 长园集团股份有限公司 | Three-layer thermal shrinkage composite tube |
| CN104900334A (en) * | 2015-05-08 | 2015-09-09 | 大连联合高分子材料有限公司 | 10-35kv insulating tubular bus and manufacturing method thereof |
| CN105825914A (en) * | 2016-01-27 | 2016-08-03 | 苏州翠南电子科技有限公司 | Novel composite silicone rubber solid insulation bus |
| CN111283997A (en) * | 2019-12-16 | 2020-06-16 | 江苏沃能电气科技有限公司 | Production process of composite insulating pipe |
Also Published As
| Publication number | Publication date |
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| CN113764144A (en) | 2021-12-07 |
| CN110931187B (en) | 2021-10-15 |
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