Wiring terminal

Abstract

The utility model relates to a wiring terminal, and relates to the technical field of cable fittings, the wiring terminal comprises a wiring part, one end of the wiring part is connected with a mounting part, the other end is provided with a wiring hole for wiring, the wiring part is provided with a welding ring groove at one side of the opening of the wiring hole, and the welding ring groove is communicated with the wiring hole. An opening of the welding ring groove is larger than an opening of the wiring hole, a welding ring is arranged in the welding ring groove, and the inner diameter of the welding ring is larger than or equal to the inner diameter of the wiring hole. Through the arrangement of the welding ring, after a wire is installed in the wiring hole, a worker can further fix the joint part of the wire to the end part of the wiring part through the welding ring, and meanwhile, the molten welding ring can block the joint part, so that the joint part of the wire can be better protected, and meanwhile, the entering of water vapor can be reduced; and contact resistance increase and electrical short circuit accidents caused by oxidation after the wire is in contact with air are prevented.

Description

Technical Field

[0001] The present application relates to the field of cable accessories, and in particular to a wiring terminal. Background Art

[0002] A terminal block is a connector that connects a copper terminal to a wire at the end of the wire, which can ensure reliable and convenient wiring in electrical circuits.

[0003] With the widespread application of new energy wind power, photovoltaic power stations, and new energy vehicles, this type of new energy cable generally adopts a low-voltage, high-DC mode. The current-carrying capacity requirements of the conductor are constantly increasing. The skin effect of ultra-fine stranded wires is small, the conductor generates little heat, and the current carrying capacity is larger than that of traditional wires. Therefore, most new energy cable conductors currently use ultra-fine stranded wires.

[0004] Most wind power stations are installed on coastal areas or islands. There is a large amount of NaCl aerosol in the air, which can easily corrode the terminal blocks and wire joints. Utility Model Content

[0005] In order to improve the protection effect of the connection terminal and the wire connector, the present application provides a connection terminal.

[0006] The present application provides a terminal block adopting the following technical solution:

[0007] A terminal comprises a wiring portion, one end of which is connected to a mounting portion, and the other end of which is provided with a wiring hole for wiring, the wiring portion is provided with a welding ring groove on one side of the opening of the wiring hole, the welding ring groove is connected to the wiring hole, and the opening of the welding ring groove is larger than the opening of the wiring hole, a welding ring is arranged in the welding ring groove, and the inner diameter of the welding ring is greater than or equal to the inner diameter of the wiring hole.

[0008] By adopting the above technical solution and setting the welding ring, after the wire is inserted into the wiring hole, the staff can further fix the wire joint part to the end of the wiring part through the welding ring, and at the same time, the melted welding ring can seal the joint, thereby providing better protection for the wire joint part, and at the same time, it can also reduce the entry of water vapor and prevent the increase of contact resistance and electrical short circuit accidents caused by oxidation of the wire after contacting the air.

[0009] Optionally, the welding ring is made of soldering material.

[0010] By adopting the above technical solution, the temperature requirement of the soldering process is relatively low, and the surface coating of the terminal block will not be damaged during the welding process. The soldering ring can be melted and filled in the soldering ring groove by using an electric soldering iron or electromagnetic induction heating.

[0011] Optionally, the inner wall of the welding ring groove is provided with a guiding inclined surface, and the inclined directions of the guiding inclined surfaces are close to each other on a side close to the wiring hole.

[0012] By adopting the above technical solution and setting the guiding slope, the terminal is tilted at a certain angle during the welding process, so that the melted welding ring can be effectively gathered at the joint part of the wire, achieving good sealing and covering effects.

[0013] Optionally, the wiring portion is provided with a cover at one end of the wiring hole opening.

[0014] By adopting the above technical solution and setting the sealing cover, on the one hand, the wiring hole can be kept clean during storage to ensure the electrical performance for subsequent use, and at the same time, the storage of the welding ring is also convenient and is not prone to loss.

[0015] Optionally, a material storage tube is provided on the side of the cover facing the wiring portion, and the material storage tube can be inserted into the wiring hole, and the material storage tube is filled with power compound grease.

[0016] By adopting the above technical solution, during use, the staff can directly cut the storage tube on the cover and apply the electrical composite grease on the inner wall of the wiring hole, which improves convenience.

[0017] Optionally, one end of the material storage tube facing away from the sealing cover is provided with a conical protrusion.

[0018] By adopting the above technical solution and setting the conical protrusion, the staff can squeeze out the electrical composite grease in the storage tube by cutting the tip of the protrusion, which further improves the convenience. At the same time, it is also easy to control the size of the cut opening and facilitate the control of the extrusion amount.

[0019] Optionally, a plurality of crimping strips are axially arranged on the inner wall of the wiring hole, and the cross-sections of the plurality of crimping strips are sawtooth-shaped.

[0020] By adopting the above technical solution, the provision of a plurality of crimping strips can reduce the gap between the wire and the inner wall of the wiring hole, increase the current carrying capacity of the terminal, and also enhance the gripping force on the wire to ensure the safety and reliability of the cable.

[0021] Optionally, the inner wall of the wiring hole is provided with two oppositely positioned protective ribs, the two protective ribs separate the plurality of crimping strips into two groups, and the two protective ribs are respectively located on both sides of the direction of the compressive force.

[0022] By adopting the above technical solution, the ultra-fine stranded wire is relatively easy to break due to its small diameter, and will be subjected to greater pressure in the direction of the crimping force. The provision of protective ribs can prevent the wire from being cut during the crimping process.

[0023] Optionally, the outer side wall of the wiring portion is provided with a plurality of crimping wires, and the plurality of crimping wires are configured as grooves or protrusions.

[0024] By adopting the above technical solution, the parameters such as crimping modulus and crimping spacing are specified through the setting of the crimping wire. There is no need to re-mark during crimping and the accuracy is high, which improves the crimping efficiency and ensures the crimping quality, and reduces the occurrence of excessive resistance caused by virtual pressure.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. Through the setting of the welding ring, after the wire is inserted into the wiring hole, the staff can further fix the wire joint part to the end of the wiring part through the welding ring. At the same time, the melted welding ring can seal the joint, which has a better protection effect on the wire joint part. At the same time, it can also reduce the entry of water vapor and prevent the increase of contact resistance and electrical short circuit accidents caused by oxidation of the wire after contact with the air. Through the setting of the guiding bevel, during the welding process, the terminal is tilted at a certain angle, and the melted welding ring can effectively gather at the joint part of the wire, which has a good sealing and covering effect;

[0027] 2. The setting of the cover can ensure the cleanliness of the wiring hole during storage to ensure the electrical performance of subsequent use. It is also convenient for the storage of welding rings and is not easy to lose. During use, the staff can directly cut the storage tube on the cover and apply the electrical compound grease on the inner wall of the wiring hole, which improves convenience;

[0028] 3. The setting of several crimping strips can reduce the gap between the wire and the inner wall of the wiring hole, increase the current carrying capacity of the terminal, and also enhance the grip of the wire to ensure the safety and reliability of the cable. The setting of protective ribs can prevent the crimping strips from cutting the wire during the crimping process. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0030] Figure 2 It is a cross-sectional view of the embodiment of the present application after the welding ring and the sealing cover are removed.

[0031] Figure 3 It is an exploded view of an embodiment of the present application.

[0032] Explanation of the reference numerals: 1. Wiring part; 2. Mounting part; 3. Wiring hole; 4. Mounting hole; 5. Welding ring groove; 6. Guide slope; 7. Welding ring; 8. Sealing cover; 9. Material storage tube; 10. Crimping strip; 11. Protective rib; 12. Crimping wire. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-3 This application is described in further detail.

[0034] The present application embodiment discloses a wiring terminal. Figure 1 , Figure 2 The terminal comprises a cylindrical wiring portion 1, one end of which is integrally connected with a mounting portion 2, and the other end of which is axially provided with a wiring hole 3 for wiring, and the mounting portion 2 is penetrated with a mounting hole 4.

[0035] Reference Figure 1 , Figure 2 A welding annular groove 5 is provided at one end of the wiring portion 1 away from the mounting portion 2. The welding annular groove 5 and the wiring portion 1 are axially arranged and the opening of the welding annular groove 5 is larger than the opening of the wiring hole 3, so that the welding annular groove 5 and the wiring hole 3 form a step shape at the end of the wiring portion 1. The inner wall of the welding annular groove 5 is provided with a guide slope 6, and the inclination direction of the guide slope 6 is close to each other on the side close to the wiring hole 3.

[0036] Reference Figure 2 , Figure 3 A welding ring 7 is placed in the welding ring groove 5, and the inner diameter of the welding ring 7 is greater than or equal to the inner diameter of the wiring hole 3. The welding ring 7 is made of solder material, and the inside of the welding ring 7 is filled with flux material. During the welding process, the terminal and the wire are tilted at a certain angle, and the melted welding ring 7 will converge at the joint of the wire through the guide slope 6.

[0037] Reference Figure 1 , Figure 3 A cover 8 is sleeved on one end of the wiring part 1 away from the mounting part 2, and the cover 8 closes the opening of the wiring hole 3 and restricts the welding ring 7 in the welding ring groove 5. A hollow storage tube 9 is axially connected to the side of the cover 8 facing the wiring part 1, and the storage tube 9 passes through the welding ring 7 and can be inserted into the wiring hole 3. The storage tube 9 is filled with power compound grease.

[0038] The end of the material storage tube 9 facing away from the sealing cover 8 is provided with a conical protrusion, and the electric composite grease stored inside can be squeezed out by cutting off the tip of the material storage tube 9 .

[0039] The sealing cover 8 and the material storage tube 9 are made of soft plastic injection molding, and the material storage tube 9 is sealed after the power compound grease is injected into the material storage tube 9.

[0040] Reference Figure 2 The inner wall of the wiring hole 3 is integrally formed with a plurality of crimping strips 10, which extend along the length direction of the wiring portion 1, and are evenly distributed along the circumference of the inner wall of the wiring hole 3. The cross-section of the plurality of crimping strips 10 is serrated, which can effectively enhance the gripping force on the wire after crimping.

[0041] Reference Figure 2 The inner wall of the wiring hole 3 is also integrally formed with two oppositely positioned protective ribs 11, which extend along the length direction of the wiring portion 1, and are arranged in an arc shape on one side of the inner wall of the wiring hole 3. The two protective ribs 11 separate the plurality of crimping strips 10 into two symmetrical groups, and the two protective ribs 11 are respectively located on both sides of the force direction of the crimping of the wiring portion 1. The direction of the force of the crimping of the wiring portion 1 is usually the upper and lower sides of the wiring terminal, that is, the two sides perpendicular to the direction of the mounting portion 2.

[0042] Reference Figure 1 , Figure 2 , a plurality of crimping wires 12 are arranged on the outer wall of the wiring portion 1, and the plurality of crimping wires 12 are evenly arranged along the length direction of the wiring portion 1, and the number and spacing of the crimping wires 12 vary according to the type of the terminal block. In this embodiment, the crimping wires 12 are grooves provided on the outer wall of the wiring portion 1, and in other embodiments, they can also be provided in other ways such as protrusions that can serve as identification.

[0043] The wiring steps of a terminal block in an embodiment of the present application are: remove the cover 8, measure the depth of the wiring hole 3 and cut the cable, cut the tip of the storage tube 9 with scissors or a knife, squeeze all the electrical composite grease inside into the wiring hole 3 and spread it evenly.

[0044] The wire is passed through the welding ring 7 and inserted into the wiring hole 3, and the electric hydraulic pliers are used to crimp the crimping wire 12 on the wiring terminal, and the crimping direction is from the electrical contact surface direction to the wire direction.

[0045] The connecting terminal and the wire are tilted at a certain angle, and the welding ring 7 is heated by an electric soldering iron or electromagnetic induction, so that the welding ring 7 is melted and filled in the welding ring groove 5.

[0046] Finally, bolts are passed through the mounting holes 4 of the mounting portion 2 to mount the terminal block on the electrical device to complete the installation.

[0047] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A wiring terminal, comprising a wiring portion (1), one end of the wiring portion (1) being connected to a mounting portion (2), and the other end of the wiring portion (1) being provided with a wiring hole (3) for wiring, characterized in that: The wiring portion (1) is provided with a welding ring groove (5) on one side of the wiring hole (3) opening, the welding ring groove (5) and the wiring hole (3) are connected, and the opening of the welding ring groove (5) is larger than the opening of the wiring hole (3), and a welding ring (7) is arranged in the welding ring groove (5), and the inner diameter of the welding ring (7) is greater than or equal to the inner diameter of the wiring hole (3).

2. A terminal block according to claim 1, characterized in that: The welding ring (7) is made of tin soldering material.

3. A terminal block according to claim 2, characterized in that: The inner wall of the welding ring groove (5) is provided with a guiding inclined surface (6), and the inclined directions of the guiding inclined surfaces (6) are close to each other on the side close to the wiring hole (3).

4. A terminal block according to claim 1, characterized in that: The wiring portion (1) is sleeved with a sealing cover (8) at one end of the wiring hole (3) opening.

5. A terminal block according to claim 4, characterized in that: A material storage tube (9) is provided on one side of the sealing cover (8) facing the wiring portion (1); the material storage tube (9) can be inserted into the wiring hole (3); and the material storage tube (9) is filled with electric composite grease.

6. A terminal block according to claim 5, characterized in that: The end of the material storage tube (9) facing away from the sealing cover (8) is arranged in a conical protrusion.

7. A terminal block according to claim 1, characterized in that: A plurality of crimping strips (10) are axially arranged on the inner wall of the wiring hole (3), and the cross sections of the plurality of crimping strips (10) are sawtooth-shaped.

8. A terminal block according to claim 7, characterized in that: The inner wall of the wiring hole (3) is provided with two oppositely positioned protective ribs (11), the two protective ribs (11) separate the plurality of crimping strips (10) into two groups, and the two protective ribs (11) are respectively located on both sides of the direction of the pressure receiving force.

9. A terminal block according to claim 1, characterized in that: The outer side wall of the wiring portion (1) is provided with a plurality of crimping wires (12), and the plurality of crimping wires (12) are arranged as grooves or protrusions.

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