CN204516929U - For the crimp connector of stube cable and busbar or bus - Google Patents

Abstract

A crimp-type connector for connecting cables to busbars or busbars, the connector comprising a terminal (1) and a busbar (2) or busbar (2), the terminal (1) having or comprising a U-shaped connection Part (3) and cable clamp (4), the U-shaped connecting part (3) has two parallel or substantially parallel connecting half-surfaces (7) on the upper, lower or left and right sides, wherein the two connecting half-surfaces ( 7) There are symmetrically arranged connecting holes or screw holes (8) for fasteners or screws to pass through, and there are corresponding holes for fasteners or screw holes (8) on the connecting part (5) of the busbar or busbar (2). Connecting hole or screw hole (8') through which the screw passes; wherein, when the terminal block (1) and the busbar or busbar (2) are assembled into a connector, the connecting part (5) of the busbar or busbar (2) snaps Embedded or inserted between the two connection halves (7).

Description

Crimp-type connectors for connecting cables to busbars or busbars

technical field

The utility model is suitable for a crimping connection device for electric cable conductors and belongs to the field of electric cable connection devices. More specifically, the utility model relates to a crimping type connector used for connecting cables and busbars or busbars.

Background technique

The crimping type wiring device for power cable conductors is mainly made of copper and aluminum. It is composed of terminal blocks and busbars. Terminal blocks are commonly known as copper (aluminum) terminal noses. They are generally used in electrical panels and other places that need to use screw holes for connection. Copper (aluminum) lugs are used as cables and busbars, cables and cables, motor connectors, or other accessories connected to conductors.

The classification numbers of copper (aluminum) wiring lugs currently in use are as follows:

a. By type: 1. Crimp type terminal D; 2. Crimp type connecting tube G

b. According to the material: 1. Copper T; 2. Aluminum L; 3. Copper-aluminum transition TL

c. According to structural features: oil plugging, sealing type M

For crimp-type terminals, the end of the structure is cylindrical for connecting cables. The front section of the terminal is flattened by two layers. The two layers are densely and seamlessly pressed into a plane, and holes are opened in the plane for screw connection. .

According to the formula Q=I ² R of Joule's law, it can be known that the heat generated by the current passing through the conductor is proportional to the square of the current and proportional to the resistance of the conductor. In the prior art, the crimping type terminal is connected through the screw hole, so the screw hole section is the connection contact surface, where the resistance value will be larger due to the contact resistance, so the heating effect is also relatively large. Large, especially when the contact surface is uneven due to processing problems, or in the case of poor contact, severe cases will burn the equipment or lead to more serious safety accidents. Therefore, in current engineering applications, especially at the cable joints of high and low voltage cabinets or large-capacity motors, online temperature measuring devices are installed at places where large currents pass to protect the safe operation of equipment, thus increasing investment and safety maintenance costs. .

At present, the means of reducing contact resistance mainly include:

1. Ensure that the joint surface should be flat, smooth, clean and free from oxidation.

2. The specifications and sizes of fasteners (bolts, flat washers) should be appropriate, and galvanized fasteners should be used, and stainless steel fasteners can also be used if conditions permit. To ensure the largest contact area, the torque for tightening the bolts must be appropriate and must not be loosened.

3. The terminal and the contact surface of the terminal can be smeared with special conductive grease to fill the contact gap, prevent oxidation and corrosion of the contact surface, and reduce contact resistance, especially for outdoor connections.

The technical problem to be solved by the present invention is to reduce the faults caused by the heating at the above-mentioned cable joints, and propose an effective device that can utilize existing resources, reduce investment, and improve safe operation.

Contents of the invention

Aiming at the problem that the connection part of the crimping type wiring device for power cables has relatively large resistance and is easy to generate heat, the utility model provides an improved crimping type wiring device for conductors of power cables.

According to the first embodiment of the present utility model, there is provided a crimping type connector, especially a crimping type connector for connecting cables and busbars or busbars, which is characterized in that the connector includes terminals 1 and Bus bar 2 or bus bar 2, the terminal block 1 has or includes a U-shaped connecting portion 3 and a cable clamp 4, and the U-shaped connecting portion 3 has two parallel or substantially parallel connections of upper, lower or left and right Half surface 7 (or called connection plate), wherein there are symmetrically arranged connection holes or screw holes 8 for fasteners or screws to pass through on the two connection half surfaces 7, and the connection of busbar 2 (or busbar 2) Part 5 has a corresponding connection hole or screw hole 8' for fasteners or screws to pass through; wherein, when the terminal 1 and the busbar 2 (or busbar 2) are assembled into a connector, the busbar 2 (or busbar 2) The connection part 5 of the busbar 2) is snapped or inserted between the two connection half surfaces 7, and the fasteners or screws pass through the connection holes or screw holes 8 on the connection half surface 7 of the terminal 1 and the busbar 2 (or busbar 2) The connecting hole or screw hole 8' is fastened.

Generally speaking, there is a symmetrically arranged connecting hole or screw hole 8 on the two connecting half surfaces 7 for fasteners or screws to pass through, and there is a corresponding screw hole 8 on the connecting part 5 of the busbar or busbar 2. An attachment or screw hole 8' through which a fastener or screw passes.

Generally, the cable clamp 4 is cylindrical with a circular cross-section or an elliptical cross-section, or consists of 2-4 clamping parts with arc-shaped cross-sections. The cable clamp 4 is used to clamp, fasten or tightly hold the end of the cable.

Usually, the distance between the two connection halves 7 of the connection part 3 of the terminal is adapted to the thickness of the corresponding connection part 5 of the busbar or bus bar 2 . Preferably, the distance between the two connecting half-surfaces 7 of the connecting part 3 of the terminal 1 is in the range of 2.0-70 mm, more preferably 2.3-60 mm, such as 3, 5, 10, 15, 20, 30, 40, 50 mm.

Preferably, the spacing between the two connecting half-surfaces 7 of the connecting part 3 of the terminal matches the thickness range 2.24≤a≤50mm of copper, aluminum and its alloy busbars or busbars specified in GB/T 5585-2005 .

Usually, the busbars or bars 2 are with or without cable clamps 6 .

The crimping type connector of the present application can be used in transformers and electrical cabinets. It can also be used for the connection between cables and busbars of main power switch and power switch.

The present application also provides an electrical panel cabinet (including a high and low voltage cabinet, a power box, an operation box, etc.), which is characterized in that it has the above-mentioned crimping type connector.

The present application also provides an electric motor, which is characterized in that it has the above-mentioned crimping type connector.

The present application also provides a reactor, which is characterized in that it has the above-mentioned crimping type connector.

The present application also provides a transformer (especially a dry-type transformer), which is characterized in that it has the above-mentioned crimping type connector.

The present application also provides a generator, which is characterized in that it has the above-mentioned crimping type connector.

In this application, a bus bar has the same meaning as a bus bar.

The utility model presses the connection part of the connection terminal in the crimping type cable connection device into upper and lower connection half surfaces, and the two connection half surfaces are separated at the ends, and the connecting part of the bus bar is connected to the connection terminal in the middle of the two connection half surfaces through the caliper. . The distance between the two connecting half surfaces of the connection part of the terminal of the utility model can be determined according to the actual situation. When using electrical equipment. When the power of the busbar is large, the distance between the two connecting half-planes is designed to be larger, which increases the thickness of the connecting part of the busbar to ensure safety. When the power of the electrical equipment is small, the distance between the two connecting half-planes can be designed to be smaller under the premise of ensuring normal operation, which saves materials and space. The distance between the two connecting half surfaces of the connecting part of the terminal of the utility model can be greater than the width of the cable clamp of the terminal, and can also be smaller than the width of the cable clamp of the terminal. These designs do not affect the design of the utility model and are also included in this invention. within the scope of utility models. In all the designs of the utility model, the spacing between the connecting half surfaces of the connecting part of the terminal matches the thickness of the connecting part of the busbar. That is to say, the connection half-plane spacing of the connecting part of the terminal is designed to be just clamped into or slightly larger than the thickness of the busbar (for example, a gasket can be inserted into the gap to adjust).

The utility model directly contacts the connecting part of the connecting terminal through the upper and lower surfaces of the connecting part of the busbar. Compared with the prior art, the contact area is doubled. According to

R=ρL/S

Where: R is the resistance, ρ is the resistivity, L is the conductor length, and S is the contact area.

When the connection device material and connection length are constant, the resistance is inversely proportional to the contact area. According to the formula Q=I ² R of Joule's law, the utility model increases the contact area, thereby reducing the resistance. When the electrical equipment is constant, the required current is fixed, and the heat generated by the current passing through the conductor is proportional to the square of the current and proportional to the resistance of the conductor.

Increase the contact area, thereby reducing the resistance and heat generation, so that the equipment can operate more safely and stably. And in theory, the calorific value can be reduced by half, so the online temperature measuring device can no longer be used or the usage can be reduced, reducing system and maintenance costs.

Compared with the terminal block of the prior art, the contact area of the improved contact device is doubled, so its contact resistance is also reduced by half, and the heat generation is also reduced by half, and at the same time it also reduces the surface process and contact The risk of safety accidents caused by the cause. Since the improved terminal only presses the screw hole connection part into two halves, its size and specification are the same as those of the unimproved terminal, and its size, mechanical test, short circuit test, and thermal cycle test are also in full compliance with the existing national specifications (GB/T 14315-2008) requirements. And because the structural design of the busbar and other butt joint materials is not changed, it can be conveniently applied to various current engineering projects.

During use, the busbars in the utility model can directly use some existing busbars, and can achieve the effect of reducing heat when used in conjunction with the terminal blocks designed in the utility model.

The contact resistance mentioned in the utility model means that the discontinuity of the conductor contact will generate an additional resistance.

Compared with the prior art, the utility model has the following advantages:

1. Simple structure; easy to install and disassemble.

2. The structural design of the busbar and other docking materials has not been changed, so the application rate is high;

3. Reduce the calorific value to reduce the failure rate;

4. Reduce investment and safety maintenance costs.

Description of drawings

Fig. 1 is the front view of prior art wiring device

Figure 2 is a top view of the prior art wiring device

Fig. 3 is the front view of the first design of the wiring device of the present invention

Fig. 4 is the top view of the first design of the wiring device of the present invention

Fig. 5 is the front view of the second design of the wiring device of the present invention

Figure 6 is a schematic diagram of the high and low voltage cabinet wiring

Figure 7 is a schematic diagram of the motor wiring

Figure 8 is a schematic diagram of reactor wiring

Figure 9 is a schematic diagram of dry-type transformer wiring

Reference signs: 1. Terminal block; 2. Busbar or busbar; 3. Connecting part of terminal; 4. Cable clamp of terminal; 5. Connecting part of busbar or busbar; 6. Cable clamping part of busbar; 7 , Connection half surface or connecting plate; 8 or 8', connecting hole or screw hole; 9, cable; 9', cable or lead wire.

Detailed ways

A crimping type connector for connecting cables and busbars or busbars is provided below, which is characterized in that the connector includes a terminal 1 and a busbar 2 (or busbar 2), and the terminal 1 has or includes a U-shaped The connecting part 3 and the cable clamp 4, the U-shaped connecting part 3 has two parallel or substantially parallel connecting half surfaces 7 (or called connecting plates) on the upper, lower or left and right sides, wherein the two connecting half surfaces 7 There are symmetrically arranged connection holes or screw holes 8 for fasteners or screws to pass through, and there are corresponding connection holes for fasteners or screws to pass through on the connecting part 5 of the busbar 2 (or busbar 2). Holes or screw holes 8'; wherein, when the terminal 1 and the bus bar 2 (or bus bar 2) are assembled into a connector, the connecting part 5 of the bus bar 2 (or bus bar 2) is snapped or inserted into the two connecting half surfaces 7 Between them, use fasteners or screws to fasten through the connection hole or screw hole 8 on the connection half surface 7 of the terminal 1 and the connection hole or screw hole 8' of the busbar 2 (or busbar 2).

Generally speaking, there is a symmetrically arranged connecting hole or screw hole 8 on the two connecting half surfaces 7 for fasteners or screws to pass through, and there is a corresponding screw hole 8 on the connecting part 5 of the busbar or busbar 2. An attachment or screw hole 8' through which a fastener or screw passes.

Generally, the cable clamp 4 is cylindrical with a circular cross-section or an elliptical cross-section, or consists of 2-4 clamping parts with arc-shaped cross-sections. The cable clamp 4 is used for fastening and holding the end of the cable.

Usually, the distance between the two connection halves 7 of the connection part 3 of the terminal is adapted to the thickness of the corresponding connection part 5 of the busbar or bus bar 2 . Preferably, the distance between the two connecting half-surfaces 7 of the connecting part 3 of the terminal 1 is in the range of 2.0-70 mm, more preferably 2.3-60 mm, such as 3, 5, 10, 15, 20, 30, 40, 50 mm.

Preferably, the spacing between the two connecting half-surfaces 7 of the connecting part 3 of the terminal matches the thickness range 2.24≤a≤50mm of copper, aluminum and its alloy busbars or busbars specified in GB/T 5585-2005 .

Usually, the busbars or bars 2 are with or without cable clamps 6 .

The present application also provides an electrical panel, a motor, a reactor or a dry-type transformer, which is characterized in that it has the above-mentioned crimping type connector.

Example 1:

A crimp-type connector for connecting cables to busbars or busbars, the connector includes a terminal 1 and a busbar or busbar 2, the terminal 1 has or includes a U-shaped connecting part 3 and a cable clamp 4 , the U-shaped connecting part 3 has upper, lower or left and right two parallel or substantially parallel connecting half surfaces (or called connecting plates) 7, wherein there are fasteners or screws on the two connecting half surfaces 7. Symmetrically arranged connecting holes or screw holes 8 passing through, and on the connecting part 5 of the bus bar or bus bar 2, there are corresponding connecting holes or screw holes 8' for fasteners or screws to pass through; wherein, when wiring When the terminal 1 and the bus bar or bus bar 2 are assembled into a connector, the connecting part 5 of the bus bar or bus bar 2 is inserted or inserted between the two connecting half surfaces 7, and the fastener or screw is used to pass through the connecting half surface of the terminal 1 7 on the connection hole or screw hole 8 and the connection hole or screw hole 8 ' of the bus bar or bus bar 2 for fastening.

The distance between the two connection halves 7 of the connection part 3 of the connection terminal 1 is 10 mm.

Example 2:

Example 1 was repeated, except that the distance between the two connection halves 7 of the terminal connection part 3 was 5 mm.

Example 3:

Example 1 was repeated, except that the distance between the two connection halves 7 of the terminal connection part 3 was 80 mm.

Example 4

As shown in Figure 6. A high and low voltage cabinet, the connection part of the high and low voltage cabinet adopts the crimping type connector described in Embodiment 1.

Example 5

As shown in Figure 7. An electric motor, the connection part of the electric motor adopts the crimping type connector described in Embodiment 2.

Example 6

As shown in Figure 8. A reactor, the connection part of the reactor adopts the crimping type connector described in Embodiment 1.

Example 7

As shown in Figure 9. A dry-type transformer, the connection part of the dry-type transformer adopts the crimping type connector described in Embodiment 3.

Claims (10)

1. A crimping type connector for connecting cables to busbars or busbars, characterized in that the connector includes a terminal (1) and a busbar or busbar (2), and the terminal (1) has or includes U-shaped connection part (3) and cable clamp (4), this U-shaped connection part (3) has upper, lower or left and right two parallel or substantially parallel connection half-surfaces (7), wherein There are symmetrically arranged connection holes or screw holes (8) on the two connection half surfaces (7) for fasteners or screws to pass through, and there are corresponding connections on the connection part (5) of the busbar or busbar (2) for the passage of fasteners or screws. Connecting holes or screw holes (8') through which fasteners or screws pass; wherein, when the terminal block (1) and the busbar or busbar (2) are assembled into a connector, the connecting part of the busbar or busbar (2) (5) Snap into or insert between the two connection half surfaces (7), use fasteners or screws to pass through the connection holes or screw holes (8) on the connection half surface (7) of the terminal (1) and the busbar or the connecting hole or the screw hole (8') of the busbar (2) for fastening. 2. The crimping type connector according to claim 1, characterized in that there is a symmetrical connection hole or screw hole (8) on the two connection half surfaces (7) for fasteners or screws to pass through, And on the connection part (5) of the busbar or the busbar (2), there is correspondingly a connection hole or a screw hole (8') through which fasteners or screws pass. 3. The crimping type connector according to claim 1 or 2, characterized in that the cable clamp (4) is cylindrical with a circular cross-section or an oval cross-section or is formed by 2-4 cross-sections. The arc-shaped double-teaming part is composed. 4. The crimping type connector according to claim 1 or 2, characterized in that the distance between the two connecting half surfaces (7) of the connecting part (3) of the terminal and the corresponding connection of the busbar or busbar (2) The thicknesses of the parts (5) are matched; preferably, the distance between the two connecting half surfaces (7) of the connecting part (3) of the terminal (1) is in the range of 2.0-70mm. 5. The crimping type connector according to claim 4, characterized in that the distance between the two connecting half surfaces (7) of the connecting part (3) of the terminal is the same as the copper and aluminum specified in GB/T 5585-2005. It matches the thickness range of its alloy busbar or busbar 2.24≤a≤50mm. 6. An electrical panel, characterized in that it has a crimp-type connector according to any one of claims 1-5. 7. An electric motor characterized in that it has a crimp-type connector according to any one of claims 1-5. 8. A reactor characterized in that it has a crimping type connector according to any one of claims 1-5. 9. A transformer, characterized in that it has a crimp-type connector according to any one of claims 1-5. 10. A generator, characterized in that it has a crimp-type connector according to any one of claims 1-5.