CN114498165B - High weather-resistant connector structure for rail transit, production process of connector structure and L-shaped rigid outdoor terminal - Google Patents
High weather-resistant connector structure for rail transit, production process of connector structure and L-shaped rigid outdoor terminal Download PDFInfo
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- CN114498165B CN114498165B CN202210235552.5A CN202210235552A CN114498165B CN 114498165 B CN114498165 B CN 114498165B CN 202210235552 A CN202210235552 A CN 202210235552A CN 114498165 B CN114498165 B CN 114498165B
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/46—Bases; Cases
- H01R13/533—Bases, cases made for use in extreme conditions, e.g. high temperature, radiation, vibration, corrosive environment, pressure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/02—Contact members
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
- H01R13/405—Securing in non-demountable manner, e.g. moulding, riveting
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/46—Bases; Cases
- H01R13/502—Bases; Cases composed of different pieces
- H01R13/504—Bases; Cases composed of different pieces different pieces being moulded, cemented, welded, e.g. ultrasonic, or swaged together
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/20—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for assembling or disassembling contact members with insulating base, case or sleeve
- H01R43/24—Assembling by moulding on contact members
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R2201/00—Connectors or connections adapted for particular applications
- H01R2201/26—Connectors or connections adapted for particular applications for vehicles
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Connector Housings Or Holding Contact Members (AREA)
Abstract
The invention relates to a high weather-resistant connector structure for rail transit, a production process thereof and an L-shaped rigid outdoor terminal. Compared with the traditional circular structure, the umbrella skirt of the L-shaped rigid outdoor terminal for track traffic has small wind resistance coefficient, avoids damage to the product under the action of huge pressure for a long time, and ensures long-term stable operation of the product; the product has high stability and strong weather resistance, and can effectively connect the pantograph with the indoor terminal. According to the invention, the L-shaped central conductor and the L-shaped insulating sleeve are of an integrated structure, so that on one hand, the problem of stripping among rubber materials used in a weather-resistant layer, insulating materials used in the insulating sleeve and central conductor metal materials is effectively avoided, and long-term stable operation of products is ensured; and secondly, the processing steps are reduced, the workload is reduced, and the processing difficulty is reduced.
Description
Technical Field
The invention relates to a high weather-proof connector structure for rail transit, a production process thereof and an L-shaped rigid outdoor terminal, and belongs to the technical field of high-voltage cable connectors.
Background
Along with the continuous perfection of the transportation industry in China, the China rail transit industry is in the golden period of construction and development. At present, 27.5kV power terminals for rail transit in China mainly depend on import, are high in price and long in delivery period, and cannot completely meet railway use requirements. Along with the improvement of the track traffic technology, the track traffic industry has higher and higher performance requirements on 27.5kV power terminals, but currently, the imported products in foreign countries can not meet the use requirements far, so that the country has urgent need to develop 27.5kV power terminals with excellent performance.
The connector structures used in the prior art are center conductors, silicone rubber bushings, contacts and stress cones. At present, a 27.5kV silicon rubber outdoor terminal for connecting a pantograph and an indoor terminal is difficult to control the adhesiveness of a rubber material used by a rubber umbrella skirt, an insulating material used by an insulating sleeve and a central conductor metal material, so that the actual product is easy to peel, gap, air hole and other anomalies to influence the electrical performance, partial discharge is generated in the use process, and finally the breakdown problem of the product is caused. The outdoor terminal umbrella skirt is cracked and damaged after the outdoor terminal umbrella skirt is operated for a period of time under the influence of wind power, rain and snow and other environments in the later period, and the stability of the product is poor, so that the development of railway transportation in China is severely restricted. In particular, connecting the pantograph and the indoor terminal (horizontal and vertical connection) requires two conventional connectors to mate, and even more increases the failure rate of the connectors. Therefore, the development of the 27.5kV L-shaped rigid outdoor terminal has very important value for the railway development in China.
For example, a high-voltage cable terminal for a motor train unit published by application publication number CN 110224367A; the terminal center conductor is sleeved with the insulating sleeve; although the flame retardant glass has the advantages of simple structure, pluggable property, good flame retardance, convenient installation and maintenance, and the like, the defects of easy peeling, gaps, air holes and the like exist.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a high weather-proof connector structure for rail transit.
The invention also provides a production process of the high weather-resistant connector structure.
The invention also provides the L-shaped rigid outdoor terminal comprising the high-weather-resistance connector structure.
The invention adopts the following technical scheme:
a high weather-proof connector structure for rail transit comprises an L-shaped central conductor and an L-shaped insulating sleeve; the vertical part of the L-shaped insulating sleeve is provided with an umbrella skirt, and the surface of the umbrella skirt is provided with a weather-proof layer; the cross section of the umbrella skirt is elliptical; the L-shaped central conductor, the L-shaped insulating sleeve and the weather-resistant layer are of an injection molding integrated structure.
Preferably, the diameter range of the short axis of the cross section of the umbrella skirt is 100-110 mm, and the diameter range of the long axis is 130-140 mm.
Further preferably, the ratio of the length of the short axis to the length of the long axis of the cross section of the umbrella skirt is 100:130.
The production process of the high weather-proof connector structure comprises the following steps:
cleaning and preheating an injection mold of the insulating sleeve, wherein the preheating temperature is 90 ℃, and the preheating time is 8 hours; placing the L-shaped central conductor into an injection mold, and injecting an insulating sleeve material into the injection mold, wherein the injection pressure is 500Pa; performing primary vulcanization on the formed L-shaped insulating sleeve under the constant temperature condition, and taking the L-shaped insulating sleeve out of a die to perform secondary vulcanization after the primary vulcanization is completed;
after the production of the L-shaped insulating sleeve is finished, placing the L-shaped insulating sleeve into an umbrella skirt mold for molding a weather-resistant layer, and vulcanizing once under the constant temperature condition after molding is finished, wherein the vulcanizing temperature of the primary vulcanization is 115 ℃ and the vulcanizing time is 16h; secondary vulcanization is carried out after primary vulcanization, the vulcanization temperature of the secondary vulcanization is 145 ℃, the vulcanization time is 24 hours, and the secondary vulcanization is attached to the surface of the umbrella skirt through the twice vulcanization weather-resistant layer; finally, the L-shaped central conductor, the L-shaped insulating sleeve and the weather-resistant layer are combined into a whole to obtain an injection molding integrated structure;
further preferably, the insulating sleeve material is a mixed solution of A, B; a is a liquid bisphenol A type epoxy resin; b is methyl hexahydrophthalic anhydride; alternatively, a is vinyl silicone; b is hydrogen-containing silicone oil;
when A is a liquid bisphenol A type epoxy resin; when B is methyl hexahydrophthalic anhydride; the corresponding vulcanization temperature of the first vulcanization is 120 ℃, and the vulcanization time is 24 hours; the vulcanization temperature of the second vulcanization is 145 ℃ and the vulcanization time is 24 hours;
when a is vinyl silicone; when B is hydrogen-containing silicone oil; the corresponding vulcanization temperature of the first vulcanization is 115 ℃ and the vulcanization time is 16h; the vulcanization temperature of the second vulcanization is 145 ℃ and the vulcanization time is 24 hours;
preferably, the material of the L-shaped central conductor is one of copper, copper alloy, aluminum or aluminum alloy; the weather-resistant layer is made of one of ethylene propylene diene monomer rubber or silicon rubber.
An L-shaped rigid outdoor terminal comprising the high weather-resistant connector structure, and further comprising a connector; the tail end of the L-shaped central conductor is provided with a step groove matched with the connector; one end of the connector is connected with the L-shaped central conductor in a pluggable manner, and the other end of the connector is connected with the cable; the horizontal part of the L-shaped insulating sleeve is sequentially wrapped with a metal protective shell and a rubber protective shell from inside to outside.
The metal protective shell and the rubber protective shell form a protective unit, and a central conductor, a sleeve, a connector, a cable and the like at the lower part of the connector are protected inside; the metal protection shell plays a role in rigid protection, external impact is avoided, and the rubber protection shell product plays a role in shock resistance and buffering.
Preferably, the tail end of the L-shaped rigid outdoor terminal is provided with a fixing structure; the fixing structure comprises a stress cone, a compression fitting and a fixing fitting; the stress cone is of a conical structure, and both ends of the stress cone are respectively provided with an upper inclined plane and a lower inclined plane which are matched with the step groove and the compression fitting; the stress cone is embedded into the step groove after being sleeved with the cable; the compression fitting is of a cylindrical structure, an inclined surface structure matched with the lower inclined surface of the stress cone is arranged on the inner side of one end of the compression fitting, the other end of the compression fitting is connected with the compression spring, and the other end of the compression spring acts on the fixed fitting; the fixed fitting is fixedly connected with the metal protective shell.
Further preferably, a terminal protection shell is arranged on the outer side of the fixing fitting.
Further preferably, the stress cone comprises an insulating portion and a semiconducting portion; the insulating part and the semiconducting part are one of ethylene propylene diene monomer rubber or silicon rubber;
the insulating part is of an injection molding structure, and is vulcanized after being molded, and the semiconducting part is wound and vulcanized for the second time after vulcanization.
Further preferably, the material of the compression fitting is one of copper, copper alloy, aluminum or aluminum alloy; the fixing hardware fitting is made of one of copper, copper alloy, aluminum or aluminum alloy;
preferably, the rubber protective shell is made of one of ethylene propylene diene monomer rubber or silicone rubber; the connector is made of one of copper, copper alloy, aluminum or aluminum alloy; the connector is connected with the cable through crimping.
The beneficial effects of the invention are as follows:
1. compared with the traditional circular structure, the umbrella skirt of the L-shaped rigid outdoor terminal for rail traffic has small wind resistance coefficient, and when the terminal runs at a high speed (the running speed of the high speed rail can reach 300km/h, the design speed of the product is 420 km/h), the converted resistance is greatly reduced, the resistance on the terminal product is correspondingly reduced, the product is prevented from being damaged under the action of huge pressure for a long time, and the long-term stable running of the product is ensured; the product has high stability and strong weather resistance, and effectively connects the pantograph with the indoor terminal;
2. the L-shaped central conductor and the L-shaped insulating sleeve are of an integrated structure, and are of an L-shaped structure with better stability; the problem of stripping among the rubber material used by the weather-resistant layer, the insulating material used by the insulating sleeve and the central conductor metal material is effectively avoided, so that the long-term stable operation of the product is ensured; meanwhile, the processing steps are reduced, the workload is reduced, and the processing difficulty is reduced.
Drawings
FIG. 1 is a schematic view of a high weather resistance connector structure for rail transit according to the present invention;
FIG. 2 is a schematic view of the structure of an L-shaped rigid outdoor terminal according to the present invention;
FIG. 3 is a schematic view of the structure of the L-shaped center conductor according to the present invention;
fig. 4 is a schematic structural view of an L-shaped insulating sleeve according to the present invention;
FIG. 5 is a schematic view of a structure of a connector according to the present invention;
FIG. 6 is a schematic view of the structure of the stress cone insulation portion according to the present invention;
FIG. 7 is a schematic diagram of a connection structure of a compression fitting and a fixing fitting;
FIG. 8 is a schematic structural view of the end shield according to the present invention;
the solar energy power generation device comprises a 1, an L-shaped central conductor, a 2, an L-shaped insulating sleeve, a 3, a weather-proof layer, a 4, a rubber protective shell, a 5, a metal protective shell, a 6, a connector, a 7, an insulating part, an 8, a semi-conducting part, a 9, a compression spring, a 10, a compression fitting, a 11, a fixing fitting, a 12 and a terminal protective shell.
Detailed Description
Example 1
As shown in fig. 1, 3 and 4.
A high weather-proof connector structure for rail transit comprises an L-shaped central conductor 1 and an L-shaped insulating sleeve 2; the vertical part of the L-shaped insulating sleeve 2 is provided with an umbrella skirt, and the surface of the umbrella skirt is provided with a weather-proof layer 3; the cross section of the umbrella skirt is elliptical; the L-shaped central conductor 1, the L-shaped insulating sleeve 2 and the weather-proof layer 3 are of an injection molding integrated structure. In this embodiment, the material of the L-shaped center conductor 1 is copper; the weather-resistant layer 3 is made of ethylene propylene diene monomer rubber.
The L-shaped central conductor reduces the contact resistance of conductor connection and uniforms the field intensity distribution at the connection position of the conductors; the L-shaped insulating sleeve plays a role of rigid support, and the weather-resistant layer is arranged outside the insulating sleeve, so that the insulating sleeve is effective to severe external environments such as storm thunder and rain, ultraviolet rays and the like, has high stability and ensures effective connection with a pantograph and an indoor terminal.
Example 2
The high weather resistant connector structure for rail transit of embodiment 1, further wherein the diameter of the short axis of the umbrella skirt cross section is in the range of 100mm, and the diameter of the long axis is in the range of 130mm.
Compared with the existing circular structure, the wind resistance coefficient of the elliptical structure is small (the running speed of the high-speed rail can reach 300 km/h), and the product is planned to be used on the high-speed rail of 420 km/h; test data were obtained through the test: at 300km/h, the windage coefficients of the round and oval structures are respectively 0.48Cd and 0.32Cd; the windage coefficients of the round and oval structures at 350km/h were 0.65Cd and 0.44Cd, respectively.
Example 3
The process for producing a high weather-resistant connector structure for rail transit according to embodiment 1:
cleaning and preheating an injection mold of the insulating sleeve, wherein the preheating temperature is 90 ℃, and the preheating time is 8 hours; placing the L-shaped central conductor 1 into an injection mold, and injecting an insulating sleeve material into the injection mold, wherein the injection pressure is 500Pa; the molded L-shaped insulating sleeve 2 is vulcanized for the first time under the constant temperature condition, and after the first vulcanization is finished, the L-shaped insulating sleeve 2 is taken out of the die for the second vulcanization; after secondary vulcanization is completed, conventional treatments such as lathe processing, borax processing, finish processing, conductive coating, waterproof coating, surface foreign matter inspection and the like are carried out;
after the production of the L-shaped insulating sleeve 2 is finished, placing the L-shaped insulating sleeve into an umbrella skirt mold for molding a weather-resistant layer 3, and vulcanizing once under the constant temperature condition after molding is finished, wherein the vulcanizing temperature of the primary vulcanization is 115 ℃ and the vulcanizing time is 16h; secondary vulcanization is carried out after primary vulcanization, the vulcanization temperature of the secondary vulcanization is 145 ℃, the vulcanization time is 24 hours, and the secondary vulcanization is attached to the surface of the umbrella skirt through the twice vulcanization weather-proof layer 3; finally, the L-shaped central conductor 1, the L-shaped insulating sleeve 2 and the weather-resistant layer 3 are combined into a whole to obtain an injection molding integrated structure; and (5) carrying out finish machining and size measurement after secondary vulcanization, and completing the product after qualified measurement.
In this embodiment, the insulating sleeve material is a mixed solution of A, B; a is a liquid bisphenol A type epoxy resin; b is methyl hexahydrophthalic anhydride; correspondingly, the vulcanizing temperature for the first vulcanization of the L-shaped insulating sleeve 2 is 120 ℃, and the vulcanizing time is 24 hours; the second vulcanization was carried out at 145℃for 24 hours.
Example 4
The process for producing a high weather-resistant connector structure for rail transit according to embodiment 3, wherein the insulating sleeve material is a mixed solution of A, B; a is vinyl silicone resin; b is hydrogen-containing silicone oil;
correspondingly, the vulcanizing temperature for the first vulcanization of the L-shaped insulating sleeve 2 is 115 ℃, and the vulcanizing time is 16h; the second vulcanization was carried out at 145℃for 24 hours.
Example 5
As shown in fig. 2 and 5.
An L-shaped rigid outdoor terminal comprising the high weather resistance connector structure of embodiment 1, further comprising a connection head 6; the tail end of the L-shaped central conductor 1 is provided with a step groove matched with the connector 6; one end of the connector 6 is connected with the L-shaped central conductor 1 in a pluggable manner, and the other end of the connector is connected with a cable; the horizontal part of the L-shaped insulating sleeve 2 is sequentially wrapped with a metal protective shell 5 and a rubber protective shell 4 from inside to outside.
Example 6
As shown in fig. 6-8.
The L-shaped rigid outdoor terminal of embodiment 5, further wherein a fixing structure is provided at an end of the L-shaped rigid outdoor terminal; the fixing structure comprises a stress cone, a compression fitting 10 and a fixing fitting 11; the stress cone is of a conical structure, and both ends of the stress cone are respectively provided with an upper inclined plane and a lower inclined plane which are matched with the step groove and the compression fitting 10; the stress cone is embedded into the step groove after being sleeved with the cable; the compression fitting 10 is of a cylindrical structure, an inclined surface structure matched with the lower inclined surface of the stress cone is arranged on the inner side of one end of the compression fitting 10, the other end of the compression fitting is connected with the compression spring 9, and the other end of the compression spring 9 acts on the fixed fitting 11; the fixed fitting 11 is fixedly connected with the metal protective shell 5. The outside of the fixed fitting 11 is provided with a terminal protecting shell 12.
Through experimental tests, the product meets the electrical performance requirements of GB/T28427-2012, wherein alternating-current withstand voltage 124kV is 5min, is not broken down, and impact voltage is +/-250 kV, is not broken down and is not broken down for 10 times; the insulating sleeve meets the combustion grade S4, smoke grade SR2 and dropper grade ST2 in DIN 5510-2; the stress cone body meets the oxygen index R22/R23, smoke density R22/R23 and toxicity test R22/R23 in EN 44545-2;
example 7
The L-shaped rigid outdoor termination of embodiment 6, further wherein the stress cone comprises an insulating portion 7 and a semiconducting portion 8; the insulating part 7 and the semiconducting part 8 are ethylene propylene diene monomer rubber; the insulating portion 7 is not conductive at the allowable voltage; the semiconducting portion 8 has a conductivity between that of the conductor and the insulator;
the insulating part 7 is of an injection molding structure, the insulating part 7 is vulcanized after being molded, and the semiconducting part 8 is wound and vulcanized for the second time after vulcanization. The vulcanization aims to ensure the smoothness of the interface between the insulating part 7 and the semi-conductive part 8 and avoid the breakdown of products caused by the uneven interface; through experimental tests, the stress cone after vulcanization treatment meets the European standard EN44545-2 of oxygen index R22/R23, smoke density R22/R23 and toxicity test R22/R23.
Example 8
The L-shaped rigid outdoor terminal of embodiment 6, further, the compression fitting 10 is made of copper; the fixing hardware fitting 11 is made of copper;
the compression fitting 10 is matched with the compression spring 9 to ensure that the stress cone keeps normal surface pressure under the condition of severe vibration for a long time, ensure the stability of electric field distribution and keep normal work. The fixing hardware 11 has super strong mechanical properties, and ensures that the stress cone and the compression hardware 10 maintain normal operation under the condition of severe vibration for a long time.
Example 9
The outdoor L-shaped rigid terminal according to embodiment 5, wherein the rubber protective shell 4 is made of ethylene propylene diene monomer rubber; the connector 6 is made of copper; the connector 6 is connected with the cable by crimping. The compactness that has guaranteed conductor and connector contact through the mode of crimping compares with the welding, and the contact resistance of crimping is little, avoids appearing the phenomenon of generating heat in the use.
Claims (4)
1. A process for producing a high weather-resistant connector structure for rail transit, the high weather-resistant connector structure comprising an L-shaped center conductor and an L-shaped insulating sleeve; the vertical part of the L-shaped insulating sleeve is provided with an umbrella skirt, and the surface of the umbrella skirt is provided with a weather-proof layer; the cross section of the umbrella skirt is elliptical; the L-shaped central conductor, the L-shaped insulating sleeve and the weather-resistant layer are of an injection molding integrated structure;
the method is characterized in that: cleaning and preheating an injection mold of the insulating sleeve, wherein the preheating temperature is 90 ℃, and the preheating time is 8 hours; placing the L-shaped central conductor into an injection mold, and injecting an insulating sleeve material into the injection mold, wherein the injection pressure is 500Pa; performing primary vulcanization on the formed L-shaped insulating sleeve under the constant temperature condition, and taking the L-shaped insulating sleeve out of a die to perform secondary vulcanization after the primary vulcanization is completed;
after the production of the L-shaped insulating sleeve is finished, placing the L-shaped insulating sleeve into an umbrella skirt mold for molding a weather-resistant layer, and vulcanizing once under the constant temperature condition after molding is finished, wherein the vulcanizing temperature of the primary vulcanization is 115 ℃ and the vulcanizing time is 16h; secondary vulcanization is carried out after primary vulcanization, the vulcanization temperature of the secondary vulcanization is 145 ℃, the vulcanization time is 24 hours, and the secondary vulcanization is attached to the surface of the umbrella skirt through the twice vulcanization weather-resistant layer; finally, the L-shaped central conductor, the L-shaped insulating sleeve and the weather-resistant layer are combined into a whole to obtain an injection molding integrated structure.
2. The process for producing a highly weather-resistant connector structure for rail transit as claimed in claim 1, wherein the diameter of the short axis of the cross section of the umbrella skirt ranges from 100 to 110mm, and the diameter of the long axis ranges from 130 to 140mm.
3. The process for producing a high weather resistant connector structure for rail transit of claim 2, wherein the ratio of the length of the minor axis to the major axis of the cross section of the umbrella skirt is 100:130.
4. The process for producing a highly weatherable connector structure for rail transit according to claim 1, wherein: the insulating sleeve material is a mixed solution of A, B; a is a liquid bisphenol A type epoxy resin; b is methyl hexahydrophthalic anhydride; alternatively, a is vinyl silicone; b is hydrogen-containing silicone oil;
when A is a liquid bisphenol A type epoxy resin; when B is methyl hexahydrophthalic anhydride; the corresponding vulcanization temperature of the first vulcanization is 120 ℃, and the vulcanization time is 24 hours; the vulcanization temperature of the second vulcanization is 145 ℃ and the vulcanization time is 24 hours;
when a is vinyl silicone; when B is hydrogen-containing silicone oil; the corresponding vulcanization temperature of the first vulcanization is 115 ℃ and the vulcanization time is 16h; the second vulcanization was carried out at 145℃for 24 hours.
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