CN213124764U

CN213124764U - Inverter side quick plug-in type copper-aluminum converter

Info

Publication number: CN213124764U
Application number: CN202021588896.7U
Authority: CN
Inventors: 庄锦强; 马建荣; 田军; 朱东琴; 杨晓岚
Original assignee: Changshu Lixing Photoelectric Science & Technology Co ltd
Current assignee: Changshu Lixing Photoelectric Science & Technology Co ltd
Priority date: 2020-08-04
Filing date: 2020-08-04
Publication date: 2021-05-04
Anticipated expiration: 2030-08-04

Abstract

The utility model discloses an inverter side fast plug-in type copper-aluminum converter, which comprises a plastic shell, wherein the inner side of the right end of the plastic shell is provided with a right step hole, a right sealing ring is arranged in the right step hole, a plastic ring is arranged outside the right sealing ring, the plastic ring is provided with an extrusion tooth, the right end of the plastic shell is connected with a plastic cap, and the plastic cap presses the extrusion tooth to extrude the right sealing ring to realize sealing; the left end connection inner side of the plastic shell is provided with a left step hole MC4 interface, a left sealing ring is arranged in the left step hole, and the MC4 interface extrudes the left sealing ring to realize sealing; the connector is arranged in the plastic shell, the left end and the right end of the connector are respectively connected with a left lead and a right lead, the right lead penetrates out of the plastic cap through the inner side of the right sealing ring, the left lead is connected with the MC4 terminal, and the MC4 terminal penetrates into the MC4 interface through the inner side of the left sealing ring. The utility model has simple structure, simple and convenient installation and convenient maintenance, and can isolate the cable from the outside; meanwhile, the MC4 interface can realize quick plug-in and is convenient to operate.

Description

Inverter side quick plug-in type copper-aluminum converter

Technical Field

The utility model relates to a quick plug-in type copper aluminium converter of dc-to-ac converter side for the cable conversion is placed outside the cable, seals cable inside, realizes that inside cable of copper aluminium converter and external dust, water, air etc. are isolated.

Background

Special parts of the cable often need to be isolated from external dust, water, air and the like, such as the connecting part of the cable. For example, when the photovoltaic circuit part is changed into an aluminum or aluminum alloy conductor cable, the connection between copper and aluminum is involved, and sealing is needed to be performed to solve the problem of electrochemical corrosion between copper and aluminum. Otherwise, connection failure may be caused, and safe and stable operation of the photovoltaic circuit is affected. Good connections with contact resistance slightly above the initial value; and poor connections may have contact resistances that reach tens or even hundreds of times the initial value. The power consumed by one connector is balanced with the power consumed by the whole cable. The contact resistance is large, so that the heat generation is more serious, which is a vicious circle. Not only causes unnecessary consumption of electric power, but also causes disconnection of electric circuit or electric fire for a long time.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a make cable and isolated dc-to-ac converter side such as external dust, water, air insert formula copper aluminium converter fast is provided.

In order to solve the technical problem, the inverter side quick plug-in type copper-aluminum converter comprises a plastic shell, wherein a right step hole is formed in the right side of the plastic shell, a right end face is arranged between a large hole and a small hole of the right step hole, a right sealing ring is arranged in the large hole of the right step hole at the position of the right end face, a convex ring is arranged at the end part of the right sealing ring, and the convex ring is attached to the right end face; a plastic ring is arranged outside the right sealing ring in a large hole of the right step hole, and the plastic ring is provided with a plurality of uniformly distributed extrusion teeth; the end surface of the plastic ring extrudes the convex ring towards the right end surface; the right sealing ring and the extrusion teeth extend out of the plastic shell; the plastic shell is connected with a plastic cap, and when the plastic cap is connected to the plastic shell, the plastic cap presses the extrusion teeth to extrude the right sealing ring.

The left side of the plastic shell is connected with an MC4 interface; on the side of the plastic shell, a left step hole is formed in the inner side of the MC4 interface, a left end face is arranged between the large hole and the small hole of the left step hole, a left sealing ring is arranged in the large hole of the left step hole at the position of the left end face, and the left sealing ring is attached to the left end face; when the MC4 interface is connected on the plastic casing, the MC4 interface extrudes the left sealing ring.

The plastic shell is internally provided with a joint, the left end of the joint is provided with a left interface, the right end of the joint is provided with a right interface, the left interface is connected with a left lead, the left lead is connected with an MC4 terminal, and the right interface is connected with a right lead; the MC4 terminal penetrates into an MC4 joint through the inner side of a left sealing ring, the left sealing ring is arranged on the joint, and when the MC4 joint extrudes the left sealing ring, the left sealing ring and the joint are sealed; the right wire penetrates out of the plastic cap through the inner side of the right sealing ring, and the plastic cap presses the extrusion teeth to extrude the right sealing ring, so that the right sealing ring and the right wire are sealed.

After the cable passes in the converter, sealed between left sealing washer and the joint when MC4 interface extrusion left sealing washer, sealed between messenger's right sealing washer and the right wire when the extrusion tooth extrusion right sealing washer is oppressed to the plastic cap. Like this, it is sealed between converter both ends and the cable, realize with converter inside with external isolated, prevent dust, water, air etc. and get into with the special parts (like the joint) contact of cable or cable, avoid producing harmful effects, improve reliability and stability. Simultaneously, left side sealing washer sets up on the joint, MC4 interface extrusion left side sealing washer prevents effectively that the joint is not hard up, and water-proof effects is good.

Preferably, the MC4 interface is through first threaded connection plastic casing, the plastic casing is through second threaded connection plastic cap.

The first thread is provided with a first elastic sheet which is transversely arranged, the tail end of the first elastic sheet is connected to the first thread, and a gap is formed in the inner side of the first elastic sheet; on the left side of the plastic shell, a plurality of first elastic sheet clamping grooves are uniformly distributed in the circumferential direction on the inner side of the plastic shell, and the first elastic sheet clamping grooves are used for blocking the head ends of the first elastic sheets and preventing the first threads from rotating.

A second elastic sheet is arranged on the second thread, the second elastic sheet is transversely arranged, the tail end of the second elastic sheet is connected to the second thread, and a gap is formed in the inner side of the second elastic sheet; at the plastic casing side, the inboard circumference evenly distributed of plastic cap has a plurality of second shell fragment draw-in grooves, and the second shell fragment draw-in groove is used for blockking second shell fragment head end, prevents that the second screw thread circles round.

The MC4 interface is a MC4 male end or female end.

The utility model discloses a converter for cable conversion simple structure, the installation is simple convenient, is convenient for maintain, realizes completely cut off the cable with external, prevents dust, water, air etc. to get into and the special position (if connect) contact of cable or cable, avoids producing harmful effects, improves reliability and stability. Soldering tin is added after the photovoltaic terminal (MC4 terminal) is crimped, so that the contact resistance is reduced, and the temperature rise and overheating are prevented; meanwhile, the MC4 interface can realize quick plug-in and is convenient to operate.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a diagram of a converter component.

Fig. 2 is a cross-sectional view of the transducer.

Fig. 3 is a perspective view of the transducer.

Fig. 4 is a perspective view of the transducer.

Detailed Description

As shown in fig. 1, 2 and 3, the inverter-side fast plug-in copper-aluminum converter comprises a plastic shell 1, wherein a right stepped hole 2 is formed in the inner side of the plastic shell 1 on the right side of the plastic shell 1, a right end face is arranged between a large hole and a small hole of the right stepped hole 2, a right sealing ring 3 is arranged in the large hole of the right stepped hole 2 on the right end face, a convex ring 4 is arranged at the end part of the right sealing ring 3, and the convex ring 4 is attached to the right end face; in the big hole of the right step hole 2, a plastic ring 6 is arranged outside the right sealing ring 3, and the plastic ring 6 is provided with a plurality of uniformly distributed extrusion teeth 5; the end face of the plastic ring 6 (extruded by the plastic cap 7) extrudes the convex ring 4 towards the right end face; the right sealing ring 3 and the extrusion teeth 5 extend out of the plastic shell 1; the plastic shell 1 is connected with a plastic cap 7. When the plastic cap 7 is connected to the plastic shell 1, the plastic cap 7 presses the extrusion teeth 5 (the inner side of the plastic cap 7 is provided with an inclined plane, and the inclined plane presses the extrusion teeth 5) to extrude the right sealing ring 3, so that the right sealing ring 3 is attached to the cable inside the right sealing ring to be airtight (meanwhile, the fixation is also realized).

The plastic cap 7 is connected to the plastic shell 1 through a second thread, a second elastic sheet 16 is arranged at the root of the second thread, the second elastic sheet 16 is transversely arranged, the tail end of the second elastic sheet 16 is connected to the second thread, and a gap is formed in the inner side of the second elastic sheet 16; at one side of the plastic shell 1, a plurality of second elastic sheet clamping grooves 18 are uniformly distributed on the inner side of the plastic cap 7 in the circumferential direction, and the second elastic sheet clamping grooves 18 are used for blocking the head ends of the second elastic sheets 16 to prevent the second threads from circling.

When the plastic cap 7 is rotationally connected with the plastic shell 1, the plastic cap 7 rotationally extrudes the second elastic sheet 16 to enable the second elastic sheet 16 to deform inwards, so that the second elastic sheet 16 is prevented from influencing the connection of the plastic cap 7 and the plastic shell 1; when the second elastic piece 16 is not deformed by a force, the head end of the second elastic piece 16 abuts against the second elastic piece clamping groove 18 (any one second elastic piece clamping groove 18) to prevent the second thread from rotating (the plastic cap 7 or the plastic shell 1 rotates in a non-fastening direction).

When plastic cap 7 and plastic casing 1 fastening connection, the locking structure who comprises second shell fragment 16 and second shell fragment draw-in groove 18 avoids plastic cap 7 or plastic casing 1 rotatory (non-fastening direction) under the effect of vibrations or external force, effectively solves plastic cap 7 or plastic casing 1 and circles round the problem that the pine takes off, makes assembly quality more stable.

On the left side of a plastic shell 1, the plastic shell 1 is connected with an MC4 interface 8 (the MC4 interface 8 is an MC4 male end or a female end), on the side of the plastic shell 1, the inner side of the MC4 interface 8 is provided with a left step hole 9, a left end face is arranged between a large hole and a small hole of the left step hole 9, a left sealing ring 10 is arranged in a large hole of the left step hole 9 at the position of the left end face, and the left sealing ring 10 is attached to the left end face; when the MC4 interface 8 is connected to the plastic housing 1, the MC4 interface 8 extrudes the left sealing ring 10, so that the left sealing ring 10 is attached to the joint 12 inside the left sealing ring to be sealed (and fixed).

The plastic shell 1 is connected to the MC4 interface 8 through a first thread, a first elastic sheet 15 is arranged on the first thread, the first elastic sheet 15 is transversely arranged, the tail end of the first elastic sheet 15 is connected to the first thread, and a gap is formed in the inner side of the first elastic sheet 15; on the left side of the plastic housing 1, a plurality of first elastic sheet clamping grooves 17 are uniformly distributed on the inner side of the plastic housing 1 in the circumferential direction, and the first elastic sheet clamping grooves 17 are used for blocking the head ends of the first elastic sheets 15 to prevent the first threads from rotating around.

When the MC4 interface 8 is rotationally connected with the plastic shell 1, the plastic shell 1 rotationally extrudes the first elastic sheet 15 to enable the first elastic sheet 15 to deform inwards, so that the first elastic sheet 15 is prevented from influencing the connection of the MC4 interface 8 and the plastic shell 1; when the first elastic sheet 15 is not deformed by a force, the head end of the first elastic sheet 15 abuts against the first elastic sheet slot 17 (any one of the first elastic sheet slots 17) to prevent the first thread from rotating (rotation of the MC4 interface 8 or the plastic housing 1 in the non-fastening direction).

When MC4 interface 8 and plastic casing 1 fastening connection, the locking structure who comprises first shell fragment 15 and first shell fragment draw-in groove 17 avoids MC4 interface 8 or plastic casing 1 rotatory (non-fastening direction) under the effect of vibrations or external force, effectively solves the problem that MC4 interface 8 or plastic casing 1 turned round the pine and take off, makes assembly quality more stable.

A connector 12 is arranged in the plastic shell 1, a left connector 21 is arranged at the left end of the connector 12, a right connector 22 is arranged at the right end of the connector 12, the left connector 21 is connected with a left lead 13 in a riveting and pressing mode, the left lead 13 is connected with an MC4 terminal 11, specifically, the MC4 terminal 11 is connected with the left lead 13 in a riveting and pressing mode, soldering tin is added after the pressing and connecting, and the right connector 22 is connected with a right lead 14 in a riveting and pressing mode; the MC4 terminal 11 penetrates into the MC4 interface 8 through the inner side of the left sealing ring 10, the left sealing ring 10 is arranged on the joint 12, and when the MC4 interface 8 extrudes the left sealing ring 10, the left sealing ring 10 and the joint 12 are sealed; the right wire 14 penetrates out of the plastic cap 7 through the inner side of the right sealing ring 3, and when the plastic cap 7 presses the extrusion teeth 5 to extrude the right sealing ring 3, the right sealing ring 3 and the right wire 14 are sealed.

After the cable passes through the converter, when MC4 interface 8 extrudes left sealing washer 10, make between left sealing washer 10 and the joint 1 sealed, when plastic cap 7 oppresses extrusion tooth 5 extrusion right sealing washer 3, make between right sealing washer 3 and the right wire 14 sealed. Like this, it is sealed between converter both ends and the cable, realize with converter inside with external isolated, prevent dust, water, air etc. and get into with the special parts (like the joint) contact of cable or cable, avoid producing harmful effects, improve reliability and stability. Simultaneously, left side sealing washer 10 sets up on connecting 12, MC4 interface 8 extrudees left sealing washer 10, prevents effectively that joint 12 is not hard up, and water-proof effects is good.

If the copper-aluminum cable conversion connector is used as a photovoltaic module copper-aluminum cable conversion connector, the left end of the connector 12 is a copper left connector, the right end of the connector is an aluminum right connector, and the copper left connector (circular tube) and the aluminum right connector (circular tube) are connected through a friction welding process. The right aluminum connector (circular tube) is pre-coated with antioxidant.

The copper left connector is internally connected with a copper cable conductor through riveting (or other connection modes, the same below), and the aluminum right connector is internally connected with an aluminum cable conductor through riveting. The copper cable is connected with an MC4 terminal 11 in a riveting mode, the MC4 terminal 11 penetrates into an MC4 interface 8 through the inner side of a left sealing ring 10, and when the MC4 interface 8 extrudes the left sealing ring 10, the left sealing ring 10 and a joint 12 are sealed; the aluminum cable penetrates out of the plastic cap 7 through the inner side of the right sealing ring 3, and when the plastic cap 7 presses the extrusion teeth 5 to extrude the right sealing ring 3, the right sealing ring 3 and the aluminum cable are sealed. Therefore, the waterproof and dustproof performance, the high and low temperature resistance, the ultraviolet resistance, the touch performance and other performances can be achieved, the reliability and the stability of copper-aluminum connection (Cu-Al) can be improved, and the installation is simple and convenient and is convenient to maintain. Meanwhile, the MC4 interface (male end or female end) realizes quick plug-in, and is convenient to operate.

The installation and use sequence is as follows:

1. the right sealing ring 3, the plastic ring 6 and the plastic cap 7 are pre-penetrated by the aluminum cable.

2. In the step 1, all components are preassembled without being screwed, only loose assembly is needed, and the joint 12 is not assembled firstly.

3. The insulating skins at the head parts of the copper cable and the aluminum cable are respectively peeled, so that copper wires (aluminum wires) cannot be damaged or broken.

4. The conductor of the left end copper cable is threaded into the left port 21 of the copper end of the connector 12 until the copper conductor makes contact with the bottommost portion.

5. By means of a belt having a length of 4mm²The left end of the joint 12 is riveted by a special manual hydraulic clamp of the cutting die until the upper blade and the lower blade are completely attached.

6. And riveting the other end of the copper cable by using a terminal machine provided with an MC4 terminal 11 cutting die, and adding soldering tin after the riveting connection meets the tension and high width standards.

7. After checking that the riveting is free of quality problems, the connector 12, the copper cable and the MC4 terminal 11 are threaded into the MC4 interface 8.

8. The conductor of the right-hand aluminum cable is threaded into the right port 22 of the aluminum end of the connector 12 until the aluminum conductor contacts the bottommost portion.

9. The right end of the joint 12 is riveted by a special manual hydraulic clamp provided with a 6mm2 cutting die until the upper blade and the lower blade are completely attached.

10. After the riveting is checked to have no quality problem, the MC4 interface 8 is screwed and installed on the left side of the plastic shell 1. The tightening can be performed by a torque tool, and the tightening torque between the MC4 interface 8 and the plastic housing 1 needs to reach 50N.

11. After cables at two ends are straightened, the MC4 interface 8 and the plastic shell 1 are respectively fixed, the plastic shell 1 and the plastic cap 7 are screwed by using a torque tool, the screwing force needs to reach 50N, and when a thread clearance 2 +/-0.5 between the plastic cap 7 and the plastic shell 1 is observed, the locking is completed.

The above-mentioned embodiment does not limit the utility model in any way, and all the technical solutions that adopt the mode of equivalent replacement or equivalent transform to obtain all fall within the protection scope of the utility model.

Claims

1. The inverter side quick plug-in type copper-aluminum converter is characterized by comprising a plastic shell, wherein a right step hole is formed in the inner side of the plastic shell on the right side of the plastic shell, a right end face is arranged between a large hole and a small hole of the right step hole, a right sealing ring is arranged in the large hole of the right step hole on the right end face, a convex ring is arranged at the end part of the right sealing ring, and the convex ring is attached to the right end face; a plastic ring is arranged outside the right sealing ring in a large hole of the right step hole, and the plastic ring is provided with a plurality of uniformly distributed extrusion teeth; the end surface of the plastic ring extrudes the convex ring towards the right end surface; the right sealing ring and the extrusion teeth extend out of the plastic shell; the plastic shell is connected with a plastic cap, and when the plastic cap is connected to the plastic shell, the plastic cap presses the extrusion teeth to extrude the right sealing ring;

the left side of the plastic shell is connected with an MC4 interface; on the side of the plastic shell, a left step hole is formed in the inner side of the MC4 interface, a left end face is arranged between the large hole and the small hole of the left step hole, a left sealing ring is arranged in the large hole of the left step hole at the position of the left end face, and the left sealing ring is attached to the left end face; when the MC4 interface is connected to the plastic shell, the MC4 interface extrudes the left sealing ring;

2. The inverter-side quick-connect copper-aluminum converter according to claim 1, characterized in that: the MC4 interface is through first threaded connection plastic casing, the plastic casing passes through second threaded connection plastic cap.

3. The inverter-side quick-connect copper-aluminum converter according to claim 2, characterized in that: the first thread is provided with a first elastic sheet which is transversely arranged, the tail end of the first elastic sheet is connected to the first thread, and a gap is formed in the inner side of the first elastic sheet; on the left side of the plastic shell, a plurality of first elastic sheet clamping grooves are uniformly distributed in the circumferential direction on the inner side of the plastic shell, and the first elastic sheet clamping grooves are used for blocking the head ends of the first elastic sheets and preventing the first threads from rotating.

4. The inverter-side quick-connect copper-aluminum converter according to claim 2, characterized in that: a second elastic sheet is arranged on the second thread, the second elastic sheet is transversely arranged, the tail end of the second elastic sheet is connected to the second thread, and a gap is formed in the inner side of the second elastic sheet; at the plastic casing side, the inboard circumference evenly distributed of plastic cap has a plurality of second shell fragment draw-in grooves, and the second shell fragment draw-in groove is used for blockking second shell fragment head end, prevents that the second screw thread circles round.

5. The inverter-side quick-connect copper-aluminum converter according to claim 1, characterized in that: the MC4 interface is a MC4 male end or female end.