CN218160906U

CN218160906U - MC4 copper-aluminum transition lock pin for aluminum core photovoltaic wire

Info

Publication number: CN218160906U
Application number: CN202222003516.4U
Authority: CN
Inventors: 王绍刚; 蔡海荣; 杨智超
Original assignee: Jiangsu Light Intensity To Power Lines Through Technology Co ltd
Current assignee: Jiangsu Light Intensity To Power Lines Through Technology Co ltd
Priority date: 2022-08-01
Filing date: 2022-08-01
Publication date: 2022-12-27
Anticipated expiration: 2032-08-01

Abstract

The utility model discloses MC4 copper aluminium transition lock pin for aluminium core photovoltaic electric wire, its MC4 female head plastic shell, MC4 male head plastic shell all set up the stopping chamber, set up the elasticity stopping position sleeve in the stopping chamber; the female head and the male head are respectively inserted into the two elastic retaining positioning sleeves; the female head and the male head are both provided with retaining bosses; the elastic retaining positioning sleeve is clamped with the retaining boss; the female head comprises O-shaped jacks at two ends, a copper needle connecting hole I, a retaining boss in the middle and a contact pin; the male head comprises O-shaped inserting cores at two ends, a copper needle connecting hole II, a stopping boss in the middle and inserting needles; the O-shaped inserting core is inserted into the O-shaped inserting hole. The female head of the utility model comprises two O-shaped jacks, a copper needle connecting hole I, a middle stopping boss and a contact pin; the male head comprises O-shaped inserting cores at two ends, a copper needle connecting hole II, a stopping boss in the middle and a contact pin; the O-shaped inserting core is inserted into the O-shaped inserting hole, a copper needle of a copper-aluminum transition long or short inserting needle does not need to be connected through a double-crown spring sleeve, and the manufacturing cost is reduced.

Description

MC4 copper-aluminum transition lock pin for aluminum core photovoltaic wire

Technical Field

The utility model relates to a photovoltaic power generation technical field specifically is MC4 copper aluminium transition lock pin for aluminium core photovoltaic electric wire.

Background

China is a country rich in aluminum and poor in copper, and the national conditions of natural resources cause the country to need a large amount of imported copper every year. In recent years, with international copper price highenterprises, the prices of electric wires and cables are synchronously improved, so that the construction cost is high. The price of the aluminum core wire and cable is much cheaper than that of the copper core wire and cable, and along with the continuous improvement of alloy materials and connection technology, the safety and reliability of the connection of the aluminum core wire and cable are also continuously improved, so that the application scale of the aluminum core wire and cable is continuously increased. In the new energy industry, aluminum core wires and cables are also applied on a large scale, but the application of photovoltaic wires is only limited by the bottleneck. Due to the development of the photovoltaic power generation technology, the existing photovoltaic module and the inverter adopt the MC4 type quick plug connection mode which is designed for the copper core photovoltaic wire, the standardization degree is high, the parts are fully produced and competed in a large scale, and the price is low. These MC4 connectors are not suitable for aluminum alloy photovoltaic wires and must be connected after copper-aluminum transition. The currently used method is to crimp the aluminum alloy photovoltaic wire to the aluminum end of a copper-aluminum transition connection tube, crimp the copper end of the copper-aluminum transition connection tube to a small segment of copper core photovoltaic wire, and then install the copper core photovoltaic wire to the MC4 connector in a traditional manner. The method not only increases two times of crimping operation to reduce the installation efficiency and the reliability of electrical connection, but also needs to increase the waterproof insulation protection of the copper-aluminum transition connecting pipe to increase the cost.

The aluminum alloy photovoltaic wire MC4 connector component disclosed in ZL202120448113.3 comprises an inserting core and a sleeve, wherein the sleeve is a copper connecting sleeve; the inserting core comprises a copper-aluminum transition short inserting needle and a copper-aluminum transition long inserting needle, the copper-aluminum transition short inserting needle comprises an aluminum tube I and a copper needle I, and the copper-aluminum transition long inserting needle comprises an aluminum tube II and a copper needle II; a copper pin I of the copper-aluminum transition short contact pin is inserted into one end of the sleeve to form a positive connector of the MC4 connector; the copper pin II of the copper-aluminum transition long insertion pin is inserted into the other end of the sleeve to form a negative connector of the MC4 connector. Two ends in the sleeve are respectively provided with a crown spring. The sleeve of the double crown spring is separately customized, and the cost is higher.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a MC4 copper-aluminum transition lock pin which does not need a double-crown spring sleeve and has relatively low manufacturing cost.

In order to solve the technical problem, the utility model provides a MC4 copper-aluminum transition lock pin for an aluminum core photovoltaic wire, which comprises a MC4 female plastic shell, a MC4 male plastic shell and a contact pin, wherein a backstop cavity is respectively arranged in the MC4 female plastic shell and the MC4 male plastic shell, and an elastic backstop positioning sleeve is arranged in the backstop cavity; the female head and the male head are respectively inserted into the two elastic retaining positioning sleeves; the female head and the male head are both provided with retaining bosses; the elastic retaining positioning sleeve is clamped with the retaining boss; the female head comprises O-shaped jacks at two ends, a copper needle connecting hole I, a retaining boss in the middle and a contact pin; the male head comprises O-shaped inserting cores at two ends, a copper needle connecting hole II, a stopping boss in the middle and a contact pin; the O-shaped inserting core is inserted into the O-shaped inserting hole.

Furthermore, a crown spring is fixedly arranged in the O-shaped jack.

Furthermore, the copper needle connecting holes I and the copper needle connecting holes II are respectively connected with contact pins through copper needles; the contact pin comprises a copper pin and an aluminum tube, and an electric wire is arranged in the aluminum tube of the contact pin.

Furthermore, the length of the copper needle is shorter than the depth of the copper needle connecting hole I or the copper needle connecting hole II.

Furthermore, an outer check sheet is arranged on the outer side of one end of the elastic check positioning sleeve, and an inner check sheet is arranged on the inner side of the other end of the elastic check positioning sleeve.

Furthermore, the inner retaining sheet clamps the retaining boss.

Compared with the prior art, the utility model, following beneficial effect has:

1. the female head of the utility model comprises O-shaped jacks at two ends, a copper needle connecting hole I, a retaining boss in the middle and a contact pin; the male head comprises O-shaped inserting cores at two ends, a copper needle connecting hole II, a middle retaining boss and inserting needles; the O-shaped inserting core is inserted into the O-shaped inserting hole, a copper needle of a copper-aluminum transition long or short inserting needle does not need to be connected through a double-crown spring sleeve, and the manufacturing cost is reduced.

2. The MC4 female plastic shell and the MC4 male plastic shell of the utility model are both internally provided with a retaining cavity, and an elastic retaining positioning sleeve is arranged in the retaining cavity; the outer side of one end of the elastic retaining positioning sleeve is provided with an outer retaining sheet, the inner side of the other end of the elastic retaining positioning sleeve is provided with an inner retaining sheet, the problem that the ferrule has no retaining structure is solved, and the female head and the male head are prevented from loosening and retaining in the structure.

3. The utility model discloses the length weak point of copper needle has shortened the length of copper needle in the degree of depth of copper needle connecting hole I or copper needle connecting hole II, requires to reduce the machining precision of copper aluminium transition contact pin, has kept the lock pin of former MC4 connector through performance verification, is guaranteeing under the condition of whole electrical connection performance and security, has reduced the cost of a whole set of connector.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the structure of the elastic retaining positioning sleeve of the present invention.

Fig. 3 is a schematic view of the female-male connection of the present invention.

Fig. 4 is the schematic diagram of the structure of the contact pin of the present invention.

In the drawing, 1.MC4 female plastic shell, 2.MC4 male plastic shell, 3 inserting pin, 4 stopping cavity, 5 elastic stopping locating sleeve, 6 female head, 7 male head, 8 stopping boss, 9.O type jack, 10 crown spring, 11 copper pin connecting hole I, 12.O type inserting core, 13 copper pin connecting hole II, 14 copper pin, 15 aluminum tube, 16 outer stopping sheet, 17 inner stopping sheet, 18 electric wire, 19 locking end cap, 20 waterproof sealing element.

Detailed Description

As shown in fig. 1, the MC4 copper-aluminum transition insert core for the aluminum core photovoltaic wire comprises an MC4 female plastic shell 1, an MC4 male plastic shell 2 and a contact pin 3. The MC4 female plastic shell 1 and the MC4 male plastic shell 2 are internally provided with a retaining cavity 4, and an elastic retaining positioning sleeve 5 is arranged in the retaining cavity 4; the female head 6 and the male head 7 are respectively inserted into the two elastic retaining positioning sleeves 5; the female head 6 and the male head 7 are both provided with retaining bosses 8; the elastic retaining positioning sleeve 5 is clamped with the retaining boss 8.

As shown in fig. 2, the outer retaining piece 16 is arranged on the outer side of one end of the elastic retaining locating sleeve 5, the inner retaining piece 17 is arranged on the inner side of the other end of the elastic retaining locating sleeve, and the inner retaining piece 17 clamps the retaining boss 8, so that the problem that the ferrule has no retaining structure is solved, and the female head and the male head are prevented from loosening and retaining in the structure.

As shown in fig. 3, the female head 6 comprises an O-shaped jack 9, a copper pin connecting hole i 11, a retaining boss 8 and a pin 3, wherein the O-shaped jack and the copper pin connecting hole are respectively positioned at two ends of the female head; the male head 7 comprises an O-shaped ferrule 12, a copper pin connecting hole II 13, a middle backstop boss 8 and a contact pin 3 which are respectively positioned at two ends; the copper needle connecting holes I11 and the copper needle connecting holes II 13 are respectively connected with inserting needles 3 through copper needles 14; the O-shaped inserting core 12 of the male head 7 is inserted into the O-shaped inserting hole 9 of the female head 6, and the copper needle of the copper-aluminum transition long or short inserting needle does not need to be connected through a double-crown spring sleeve, so that the manufacturing cost is reduced, and the manufacturing cost is reduced. And a crown spring 10 is fixedly arranged in the O-shaped jack 9 and used for fixing an O-shaped ferrule 12 to prevent the male head 7 from moving.

As shown in fig. 4, first, a copper bar and an aluminum bar are welded together by friction welding, the weld is rounded, the aluminum end is machined to an aluminum pipe 15 of a predetermined size, and the copper end is machined to a cylindrical copper pin 14 of a predetermined size. The length of the copper pin 14 is slightly shorter than the depth of the copper pin connecting hole I11 or the copper pin connecting hole II 13, the length of the copper pin is shortened, the requirement on the machining precision of a copper-aluminum transition contact pin is reduced, an insertion core of the original MC4 connector after performance verification is reserved, and the cost of the whole set of connector is reduced under the condition of ensuring the integral electrical connection performance and safety. The copper pin 14 of a processed copper-aluminum transition contact pin 3 is completely inserted into a copper pin connecting hole I11 of a female head 6 of an MC4 connector, then the female head 6 of the MC4 copper-aluminum transition insertion core is formed by cold press welding or welding, and the aluminum pipe 15 of the contact pin 3 is internally provided with the anode of a wire 18. And (3) completely inserting a copper pin 14 of the other processed copper-aluminum transition contact pin 3 into a copper pin connecting hole II 13 of the male head 7 of the MC4 connector, then cold-pressing or welding to combine the male head 7 of the MC4 copper-aluminum transition insert pin, and arranging a negative electrode of an electric wire 18 in an aluminum pipe 15 of the contact pin 3.

The utility model discloses when implementing the installation, strip the insulation with 18 positive pole tip of aluminium core photovoltaic electric wire, expose about 10mm of conductor length, scrape the oxide film that grinds the conductor surface with blade or abrasive paper and clean, embolia the locking end cap 19 and the waterproof sealing member 20 of MC4 connector in advance, extrude a small amount of conductive paste on the aluminium core conductor and embolia the aluminum pipe 15 of MC4 copper-aluminum transition lock pin female 6, rotate MC4 copper-aluminum transition lock pin female 6 several circles along the aluminium alloy conductor monofilament transposition direction, make conductive paste evenly coat on the aluminium core conductor, then use special pressing tongs with the aluminum pipe 15 of MC4 copper-aluminum transition female 6 firm with the conductor crimping of aluminium core photovoltaic line, then pack into the anodal injection molding of MC4 connector, the female head of MC4 moulds 1 in the shell, the sealing member installation that embolias in advance targets in place, then screw up locking end cap 19, accomplish the anodal connector of MC4 connector. In the same way, firmly crimping the aluminum alloy photovoltaic wire negative electrode and the aluminum pipe 15 of the MC4 copper-aluminum transition insertion core male head 7, installing the aluminum alloy photovoltaic wire negative electrode and the aluminum pipe into the MC4 connector negative electrode injection molding part and the MC4 male head plastic shell 2, installing the pre-sleeved waterproof sealing part 20 in place, and then screwing the locking end cap 19 to complete the negative electrode connector of the MC4 connector.

It will be understood by those skilled in the art that the embodiments of the present invention as described above and shown in the drawings are given by way of example only and are not limiting of the present invention. The purpose of the utility model is completely and effectively realized. The functional and structural principles of the present invention have been shown and described in the embodiments without departing from the principles, embodiments of the present invention may have any deformation or modification.

Claims

1.MC4 copper aluminium transition lock pin for aluminium core photovoltaic electric wire moulds shell, MC4 male head including the female head of MC4 moulds shell, contact pin, its characterized in that: the MC4 female plastic shell and the MC4 male plastic shell are internally provided with a retaining cavity, and an elastic retaining positioning sleeve is arranged in the retaining cavity; the female head and the male head are respectively inserted into the two elastic retaining positioning sleeves; the female head and the male head are both provided with retaining bosses; the elastic retaining positioning sleeve is clamped with the retaining boss; the female head comprises O-shaped jacks at two ends, a copper needle connecting hole I, a retaining boss in the middle and a contact pin; the male head comprises O-shaped inserting cores at two ends, a copper needle connecting hole II, a stopping boss in the middle and inserting needles; the O-shaped inserting core is inserted into the O-shaped inserting hole.

2. The MC4 copper-aluminum transition inserting core for the aluminum core photovoltaic wire as claimed in claim 1, which is characterized in that: and a crown spring is fixedly arranged in the O-shaped jack.

3. The MC4 copper-aluminum transition insert core for the aluminum core photovoltaic wire according to claim 1, characterized in that: the copper needle connecting holes I and the copper needle connecting holes II are respectively connected with contact pins through copper needles; the contact pin comprises a copper pin and an aluminum tube, and an electric wire is arranged in the aluminum tube of the contact pin.

4. The MC4 copper-aluminum transition insert core for the aluminum core photovoltaic wire according to claim 3, characterized in that: the length of copper needle is shorter than the degree of depth of copper needle connecting hole I or copper needle connecting hole II.

5. The MC4 copper-aluminum transition inserting core for the aluminum core photovoltaic wire as claimed in claim 1, which is characterized in that: the outer side of one end of the elastic retaining positioning sleeve is provided with an outer retaining sheet, and the inner side of the other end of the elastic retaining positioning sleeve is provided with an inner retaining sheet.

6. The MC4 copper-aluminum transition insert core for the aluminum core photovoltaic wire according to claim 5, characterized in that: the inner retaining sheet clamps the retaining boss.