CN104966549A - Epoxy resin dry type sleeve - Google Patents
Epoxy resin dry type sleeve Download PDFInfo
- Publication number
- CN104966549A CN104966549A CN201510389641.5A CN201510389641A CN104966549A CN 104966549 A CN104966549 A CN 104966549A CN 201510389641 A CN201510389641 A CN 201510389641A CN 104966549 A CN104966549 A CN 104966549A
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- insulator
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- dry type
- mounting seat
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Abstract
The invention discloses an epoxy resin dry type sleeve including an insulator having a tubular hollow center, the outside of the insulator is provided with a metal installing base, the head part of the upper end is provided with an end plate, the top of the end plate is provided with a copper sealing fixed end, the copper sealing fixed end is connected with the leading-out wire joint copper conductor in a tubular hollow tube, and a metal installing base is provided with a ground screen device connected with the outer layer of a capacitive pole plate layer in the insulator. The epoxy resin dry type sleeve uses a cylindrical die and the metal installing base as a sleeve frame, and uses epoxy resin as main insulating materials, and a hollow insulation main body is formed by casting epoxy resin on the die by means of vacuum pressure gelation technology. The epoxy resin dry type sleeve is simple in structure, fewer in raw material types, convenient for batch production quality control, less in local discharging, and high in mechanical strength, and has no oil and burning and explosion hidden troubles.
Description
Technical field
The present invention relates to power equipment assembly field, particularly relate to a kind of epoxy resin dry type sleeve pipe.
Background technology
The lead-in wire leading-out terminal of liquid immersion type power equipment, also known as sleeve pipe or insulator, is the assembly of liquid immersion type power equipment indispensability.Paper condenser structure mostly is for many years, the oilpaper capacitor core that the interior insulation of such sleeve pipe is made up of high-tension cable paper and conductive metal foil at the lead-in wire sleeve pipe of liquid immersion type power equipment as transformer and reactor generally adopt of mesohigh (such as 66kV-220kV).This capacitor core conductor is in maximum potential at the center of sleeve pipe, and its outermost is earth potential close to ground connection mounting flange place; And its outside is umbrella insulator, transformer oil is placed in insulator inside, and capacitor core is immersed in transformer oil; The oil conservator of a special sleeve pipe oil volume expansion compensation is placed in sleeve upper end, forms the basic structure of such sleeve pipe thus.Obviously, this type of sleeve pipe also exists complex structure, and constituent material is various, and process equipment requires high, the obvious defect of the wayward grade of workmanship; Simultaneously owing to being oil-filled structure in insulator, the hidden danger that inevitably there is leakage of oil and fire.Operating experience for many years shows that more than 80% of power equipment fire is caused by oil filled bushing seepage.Thus dry oil-free casing becomes a kind of objective demand.
In the patent No. be: 201010292041.4, patent name is: in the Chinese patent of dry type high-voltage capacitor core and manufacture method thereof, uses it discloses a kind of condenser type fuse technology be alternately wound around by glass layer and metal forming or wire netting in sleeve technology; At the insulator of the outside of this capacitor core suit silicon rubber, form dry oil-free casing.Although this technology achieves the dry type non-oil ultra high vacuum system of sleeve pipe, complex structure, manufacturing equipment is complicated, and technical process is loaded down with trivial details, and raw material constituent is many, and quality control difficulty is large, and the removal of bubbles difficulty in winding process, partial discharge controls difficult, and product cost is expensive.
And pure epoxy resin cast dry sleeve has obtained exploitation on low voltage power equipment, see that the patent No. is: 201320376108.1, patent name is: the Chinese patent of non-capacitive dry sleeve, one of its main feature is that epoxy resin casts directly on conducting rod, and its mounting structure is also epoxide resin material pedestal.And according to its content describe and show, up to the present this technology is only applicable to the sleeve pipe of 35kV and following electric pressure.
Summary of the invention
Technical problem to be solved by this invention is, provide a kind of structure simple, manufacture mechanization degree high, dependable performance is advanced, installs simple and convenient, without oil without the epoxy resin dry type sleeve pipe firing hidden danger.
In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions: a kind of epoxy resin dry type sleeve pipe, comprise by being added with the insulator that the auxiliary material such as curing agent, flexibilizer outdoor epoxy resin is main material moulding by casting, the center of described insulator is provided with up/down perforation and tubular, hollow for connecting power equipment lead-out wire, inside is provided with capacitance pole flaggy, head is provided with end plate, and the head of described end plate is fixedly connected with the fixing termination of copper sealing; Described capacitance pole flaggy near the innermost layer of tubular, hollow together with described end plate connection; The nearly middle part, outside of described insulator is provided with the mounting seat be made up of metal material, the part described insulator is positioned at above metal mounting seat is multi-layer umbrella skirt, the part be positioned at below metal mounting seat is cylindric, described in the fixing termination of copper sealing be arranged on end plate be connected with the power equipment pinout connector copper conductor be arranged in insulator tubular, hollow; Described metal mounting seat is in falling T-shape, its upstanding portion is wrapped in insulator that outer surface is exposed in insulator exterior, in described metal mounting seat, the exposed upstanding portion in insulator exterior is provided with the connecting hole be interlinked to the outside in, described connecting hole is provided with the ground screen device be connected with capacitance pole flaggy outermost layer in insulator; Described ground screen device contacts spring, conducting rod, sealing cap and connecting line by chip and forms; Described conducting rod and connecting line are built on insulator, wherein one end of connecting line connects the outermost layer of capacitance pole flaggy, the other end is connected with the end of conducting rod, the head of described conducting rod is positioned at the connecting hole in metal mounting seat, one end of described chip contact spring is clamped in the head of conducting rod, the other end is fixedly connected with sealing cap by bolt, and described sealing cap is arranged on the outside of connecting hole.
As preferably, in described metal mounting seat, the outer end of connecting hole is provided with outside installation screw thread, and described sealing cap is socketed on this installation screw thread.
As preferably, horizontal component in described metal mounting seat is provided with multiple installing hole and a steam vent, and the surface containment that its upstanding portion contacts with insulator has the thin epoxy resin layer of glass fiber reinforcement or the shallow pit shape be evenly distributed or is shallow striped grid shape.
As preferably, described capacitance pole flaggy is the metal foil layer vertically placed of multilayer or metal net layer or semiconductor lamella; For insulating material itself or be provided with glass fiber winding layer or fiberglass cloth or epoxy resin scrim layer simultaneously between described metal foil layer or between metal net layer or between semiconductor layer.
As preferably, on described insulator, multi-layer umbrella skirt position is insulating material itself or silicon rubber umbrella skirt cover.
As preferably, on described insulator, the outer surface at multi-layer umbrella skirt position is insulating material itself or is coated with the overcoat that thickness is greater than 0.5mm.
As preferably, on described insulator, the overcoat at multi-layer umbrella skirt position is layer of silica gel or nanometer radiating insulating layer, the overcoat insulating varnish layer at cylindric position or nanometer radiating insulating enamelled coating.
Compared with prior art, usefulness of the present invention is: this epoxy resin dry type sleeve pipe adopts columnar mould and metal mounting seat to be sleeve pipe skeleton, employing epoxy resin is predominating insulation, utilizes vacuum pressure gelation technology poured with epoxy resin to be formed on mould the insulating body of hollow sleeve pipe; Its structure is simple, and raw material types is few, and processing and manufacturing is easy, and batch production quality control is convenient, and without oil without firing hidden danger, partial discharge quantity is little, and mechanical strength is high.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further described.
Fig. 1 is a kind of epoxy resin dry type sleeve pipe of the present invention side structure schematic diagram;
Fig. 2 is a kind of epoxy resin dry type sleeve pipe of the present invention plan structure schematic diagram;
Fig. 3 is the structure cutaway view of A-A in Fig. 2;
Fig. 4 is the schematic enlarged-scale view of B in Fig. 3.
In figure: 1, insulator; 2, end plate; 3, the fixing termination of copper sealing; 4, capacitance pole flaggy; 5, metal mounting seat; 51, connecting hole; 52, screw thread is installed; 53, installing hole; 6, screen device; 61, chip contact spring; 62, conducting rod; 63, sealing cap; 64, connecting line; 65, bolt; 7, tubular, hollow.
Embodiment
Describe the present invention below in conjunction with the drawings and specific embodiments.
A kind of epoxy resin dry type sleeve pipe shown in Fig. 1, Fig. 2 and Fig. 3, comprise by being added with the insulator 1 that the auxiliary material such as curing agent, flexibilizer outdoor epoxy resin is main material moulding by casting, the center of described insulator 1 is provided with up/down perforation and tubular, hollow 7 for connecting power equipment lead-out wire, the inside of described insulator 1 is provided with capacitance pole flaggy 4, head is provided with end plate 2, and the head of described end plate 2 is fixedly connected with the fixing termination 3 of copper sealing, the metal foil layer that described capacitance pole flaggy 4 is vertically placed for multilayer or metal net layer or semiconductor lamella, for insulator 1 material itself or be provided with glass fiber winding layer or fiberglass cloth or epoxy resin scrim layer simultaneously between described metal foil layer or between metal net layer or between semiconductor layer, described capacitance pole flaggy 4 links together near the innermost layer of tubular, hollow 7 and described end plate 2, the nearly middle part, outside of described insulator 1 is provided with the mounting seat 5 be made up of metal material, the thermal coefficient of expansion of described metal mounting seat 5 and the similar thermal expansion coefficient of insulator 1, on described insulator 1, the part be positioned at above metal mounting seat 5 is multi-layer umbrella skirt, the part be positioned at below metal mounting seat 5 is cylindric, on described insulator 1, the outer surface at multi-layer umbrella skirt position and the outer surface at cylindric position are insulating material itself or are coated with overcoat or the silicon rubber umbrella skirt cover that thickness is greater than 0.5mm, on described insulator 1, the overcoat at multi-layer umbrella skirt position is layer of silica gel or nanometer radiating insulating layer, the overcoat insulating varnish layer at cylindric position or nanometer radiating insulating enamelled coating, the described fixing termination 3 of copper sealing be arranged on end plate 2 is connected with the power equipment pinout connector copper conductor be arranged in insulator 1 tubular, hollow 7, described metal mounting seat 5 is in falling T-shape, its horizontal component is provided with multiple installing hole 53 and a steam vent, it is exposed outside at insulator 1 that its upstanding portion is wrapped in outer surface in insulator 1, the surface containment that wherein upstanding portion contacts with insulator 1 has the thin epoxy resin layer of glass fiber reinforcement or the shallow pit shape be evenly distributed or is shallow striped grid shape, in described metal mounting seat 5, the exposed upstanding portion in insulator 1 outside is provided with the connecting hole 51 be interlinked to the outside in, described connecting hole 51 is provided with the ground screen device 6 be connected with capacitance pole flaggy 4 outermost layer in insulator 1, as shown in Figure 4, described ground screen device 6 is made up of chip contact spring 61, conducting rod 62, sealing cap 63 and connecting line 64, described conducting rod 62 and connecting line 64 are cast on insulator 1, wherein one end of connecting line 64 connects the outermost layer of capacitance pole flaggy 4, the other end is connected with the end of conducting rod 62 and together pours into a mould in year insulator 1, the head of described conducting rod 12 is positioned at the connecting hole 51 in metal mounting seat 5, one end of described chip contact spring 61 is clamped in the head of conducting rod 62, the other end is fixedly connected with sealing cap 63 by bolt 65, described sealing cap 63 is arranged on the outside of connecting hole 51, the conveniently installation of sealing cap 3, in described metal mounting seat 5, connecting hole 51 is outside equipped with and installs screw thread 52, described sealing cap 63 overlaps built-in sealing gasket and is connected on this connecting hole 51.
Particularly, its manufacture is as follows, when the casting insulated body 1 of employing vacuum pressure gelation technology, with columnar mould and metal mounting seat 5 for skeleton, be arranged on mould, in the cavity of mould upper insulator 1 position, interval is placed or is wound around expoxy glass silk ribbon or epoxy fibreglass cloth or epoxy resin grid cloth, capacitor plate is placed at interval, and appropriate packing material is filled in the full skirt position be made up of mold and bed die; Wherein mold to be fixed together with metal mounting seat 5, for the multilayer umbrella part of casting insulated body 1 above metal mounting seat 5; The below that bed die is positioned at metal mounting seat 5 with and be fixed together with metal mounting seat 5, for the circular cylinder shaped portion of casting insulated body 1; The mould assembled and metal mounting seat 5 are arranged on forcing press, and are communicated with the equipment such as feeding machine, by vacuum pressure gelation technology, the epoxy resin containing the auxiliary material such as curing agent and softening agent prepared is injected mould molding; Reach technological requirement and after the time, withdraw from device from forcing press, remove mould, pass through operations such as pour mass surface treatment, solidification, sprayed surface paints afterwards, termination 3 is fixed in finally installation end plate 2 and copper sealing, completes product manufacturing.
This epoxy resin dry type sleeve pipe adopts columnar mould and metal mounting seat 5 to be sleeve pipe skeleton, and employing epoxy resin is predominating insulation, utilizes vacuum pressure gelation technology poured with epoxy resin to be formed on mould the insulating body of hollow sleeve pipe; Its structure is simple, and raw material types is few, and processing and manufacturing is easy, and batch production quality control is convenient, and without oil without firing hidden danger, partial discharge quantity is little, and mechanical strength is high.
It is emphasized that: be only preferred embodiment of the present invention above, not any pro forma restriction is done to the present invention, every above embodiment is done according to technical spirit of the present invention any simple modification, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (7)
1. an epoxy resin dry type sleeve pipe, comprise by being added with the insulator (1) that the auxiliary material such as curing agent, flexibilizer outdoor epoxy resin is main material moulding by casting, the center of described insulator (1) is provided with up/down perforation and tubular, hollow (7) for connecting power equipment lead-out wire, inside is provided with capacitance pole flaggy (4), head is provided with end plate (2), and the head of described end plate (2) is fixedly connected with the fixing termination (3) of copper sealing; Innermost layer and the described end plate (2) of the close tubular, hollow (7) of described capacitance pole flaggy (4) link together; The nearly middle part, outside of described insulator (1) is provided with the mounting seat (5) be made up of metal material, the part described insulator (1) being positioned at metal mounting seat (5) top is multi-layer umbrella skirt, be positioned at metal mounting seat (5) below part be cylindric, it is characterized in that: described in be arranged on end plate (2) copper sealing fix termination (3) be connected with the power equipment pinout connector copper conductor be arranged in insulator (1) tubular, hollow (7); Described metal mounting seat (5) is in falling T-shape, it is exposed outside at insulator (1) that its upstanding portion is wrapped in outer surface in insulator (1), the upper exposed upstanding portion outside at insulator (1) of described metal mounting seat (5) is provided with the connecting hole (51) be interlinked to the outside in, described connecting hole (51) is provided with the ground screen device (6) be connected with insulator (1) interior capacitance pole flaggy (4) outermost layer; Described ground screen device (6) contacts spring (61), conducting rod (62), sealing cap (63) and connecting line (64) by chip and forms; Described conducting rod (62) and connecting line (64) are cast on insulator (1), wherein one end of connecting line (64) connects the outermost layer of capacitance pole flaggy (4), the other end is connected with the end of conducting rod (62), the head of described conducting rod (12) is positioned at the connecting hole (51) in metal mounting seat (5), one end of described chip contact spring (61) is clamped in the head of conducting rod (62), the other end is fixedly connected with sealing cap (63) by bolt (65), and described sealing cap (3) is arranged on the outside of connecting hole (51).
2. epoxy resin dry type sleeve pipe according to claim 1, is characterized in that: the outer end of the upper connecting hole (51) of described metal mounting seat (5) is provided with outside installation screw thread (52), and described sealing cap (3) is socketed on this installation screw thread (52).
3. epoxy resin dry type sleeve pipe according to claim 1, it is characterized in that: the horizontal component on described metal mounting seat (5) is provided with multiple installing hole (53) and a steam vent, the surface containment that its upstanding portion contacts with insulator (1) has the thin epoxy resin layer of glass fiber reinforcement or the shallow pit shape be evenly distributed or is shallow striped grid shape.
4. epoxy resin dry type sleeve pipe according to claim 1, is characterized in that: the metal foil layer that described capacitance pole flaggy (4) is vertically placed for multilayer or metal net layer or semiconductor lamella; For insulator (1) material itself or be provided with glass fiber winding layer or fiberglass cloth or epoxy resin scrim layer simultaneously between described metal foil layer or between metal net layer or between semiconductor layer.
5. epoxy resin dry type sleeve pipe according to claim 1, is characterized in that: the upper multi-layer umbrella skirt position of described insulator (1) is insulating material itself or silicon rubber umbrella skirt cover.
6. epoxy resin dry type sleeve pipe according to claim 1, is characterized in that: the outer surface at the upper multi-layer umbrella skirt position of described insulator (1) is insulating material itself or is coated with the overcoat that thickness is greater than 0.5mm.
7. epoxy resin dry type sleeve pipe according to claim 6, it is characterized in that: the overcoat at the upper multi-layer umbrella skirt position of described insulator (1) is layer of silica gel or nanometer radiating insulating layer, the overcoat insulating varnish layer at cylindric position or nanometer radiating insulating enamelled coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510389641.5A CN104966549A (en) | 2015-07-06 | 2015-07-06 | Epoxy resin dry type sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510389641.5A CN104966549A (en) | 2015-07-06 | 2015-07-06 | Epoxy resin dry type sleeve |
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| Publication Number | Publication Date |
|---|---|
| CN104966549A true CN104966549A (en) | 2015-10-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510389641.5A Pending CN104966549A (en) | 2015-07-06 | 2015-07-06 | Epoxy resin dry type sleeve |
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| CN (1) | CN104966549A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105632658A (en) * | 2016-02-18 | 2016-06-01 | 成都佳美嘉科技有限公司 | Insulator |
| CN105703293A (en) * | 2016-03-17 | 2016-06-22 | 苏州翰为电气科技有限公司 | Epoxy resin dry-type wall bushing |
| CN108469579A (en) * | 2018-05-04 | 2018-08-31 | 扬州森源电力科技有限公司 | Switchgear male-tapered casing high pressure tests terminal |
| CN112420290A (en) * | 2020-10-12 | 2021-02-26 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Integrated pure-dry high-voltage bushing with mounting flange insulation structure and manufacturing method thereof |
| CN113593794A (en) * | 2021-07-01 | 2021-11-02 | 搏世因（北京）高压电气有限公司 | Automatic pressure gel pure dry type capacitance type high-voltage insulation sleeve and manufacturing method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101710655A (en) * | 2009-12-02 | 2010-05-19 | 中国广东核电集团有限公司 | On-line monitoring grounding wire lead-out structure of high-voltage sleeve |
| WO2012163561A1 (en) * | 2011-05-27 | 2012-12-06 | Abb Technology Ag | Electric component for a high-voltage system |
| CN203260457U (en) * | 2013-05-22 | 2013-10-30 | 山东德佑电气有限公司 | Intelligent dry type glass fiber reinforced plastic transformer sleeve |
| CN203941765U (en) * | 2014-07-10 | 2014-11-12 | 南京智达电气有限公司 | A kind of condenser type dry sleeve |
| CN204029585U (en) * | 2014-08-19 | 2014-12-17 | 南京智达电气有限公司 | A kind of dry sleeve being wound around with glass fiber strap |
| CN204760063U (en) * | 2015-07-06 | 2015-11-11 | 苏州翰为电气科技有限公司 | Epoxy dry -type sleeve pipe |
-
2015
- 2015-07-06 CN CN201510389641.5A patent/CN104966549A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101710655A (en) * | 2009-12-02 | 2010-05-19 | 中国广东核电集团有限公司 | On-line monitoring grounding wire lead-out structure of high-voltage sleeve |
| WO2012163561A1 (en) * | 2011-05-27 | 2012-12-06 | Abb Technology Ag | Electric component for a high-voltage system |
| CN203260457U (en) * | 2013-05-22 | 2013-10-30 | 山东德佑电气有限公司 | Intelligent dry type glass fiber reinforced plastic transformer sleeve |
| CN203941765U (en) * | 2014-07-10 | 2014-11-12 | 南京智达电气有限公司 | A kind of condenser type dry sleeve |
| CN204029585U (en) * | 2014-08-19 | 2014-12-17 | 南京智达电气有限公司 | A kind of dry sleeve being wound around with glass fiber strap |
| CN204760063U (en) * | 2015-07-06 | 2015-11-11 | 苏州翰为电气科技有限公司 | Epoxy dry -type sleeve pipe |
Non-Patent Citations (1)
| Title |
|---|
| 韩金华 等: "电力变压器高压套管末屏接地方式问题探讨", 《变压器》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105632658A (en) * | 2016-02-18 | 2016-06-01 | 成都佳美嘉科技有限公司 | Insulator |
| CN105703293A (en) * | 2016-03-17 | 2016-06-22 | 苏州翰为电气科技有限公司 | Epoxy resin dry-type wall bushing |
| CN108469579A (en) * | 2018-05-04 | 2018-08-31 | 扬州森源电力科技有限公司 | Switchgear male-tapered casing high pressure tests terminal |
| CN108469579B (en) * | 2018-05-04 | 2024-04-30 | 扬州森源电力科技有限公司 | High-voltage testing terminal for external conical sleeve of switch cabinet |
| CN112420290A (en) * | 2020-10-12 | 2021-02-26 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Integrated pure-dry high-voltage bushing with mounting flange insulation structure and manufacturing method thereof |
| CN113593794A (en) * | 2021-07-01 | 2021-11-02 | 搏世因（北京）高压电气有限公司 | Automatic pressure gel pure dry type capacitance type high-voltage insulation sleeve and manufacturing method thereof |
| CN113593794B (en) * | 2021-07-01 | 2023-08-08 | 搏世因（北京）高压电气有限公司 | Automatic pressure gel pure dry type capacitor type high-voltage insulating sleeve and manufacturing method thereof |
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Application publication date: 20151007 |