A cold-pressed copper terminal for a wind turbine generator

Abstract

The utility model provides a kind of cold-pressing copper terminal for wind turbine generator, including wind turbine generator cold-pressing copper connection copper pipe, wind turbine generator cold-pressing copper connection copper pipe is connected with cold-pressing copper terminal piece, and copper terminal hole is opened on cold-pressing copper terminal piece, and wind turbine generator cold-pressing copper connection copper pipe is connected with terminal conductive connection component. By adopting overall copper structure, wind turbine generator cold-pressing copper connection copper pipe, cold-pressing copper terminal piece, wiring conductive copper needle are all high-purity copper material, effectively reduce contact resistance, improve power transmission efficiency. Through the composite structure of gradually changing diameter crimping piece combined with horn mouth edge, deformation reserved groove and narrow anti-drop recess, multi-stage locking of cable is realized in the cold-pressing process. Through the synergistic effect of cable connection guide U-shaped ring plate and anti-back locking hook, one-way self-locking is realized by cooperating with guide slope, effectively prevent the terminal from accidental escape in operation, greatly improve system operation safety.

Description

Technical Field

[0001] This utility model relates to the field of copper terminal block technology, and more specifically, to a cold-pressed copper terminal block for wind turbine generator sets. Background Technology

[0002] As an important renewable energy source, wind turbine generators operate in harsh environments such as high altitude, high humidity, high salt spray, strong winds and sandstorms, and severe vibrations. The reliability of their electrical connection systems directly affects the safety and stability of the entire generator. Terminal blocks, as key electrical connection components in the wind turbine's pitch system, yaw system, generator, and control circuits, perform multiple functions including current transmission, signal transmission, and mechanical fixation. Their performance has a decisive impact on the overall reliability of the system.

[0003] A copper terminal block proposed in Chinese Utility Model Patent Application No. CN201721426634.9 includes a wiring part and a connecting part, which are integrally formed. The wiring part is provided with a wiring hole and an anti-slip groove on one surface of the wiring part. The connecting part is provided with a fixing groove on the outer wall and an insulating sleeve is provided on the outside of the connecting part. The insulating sleeve is provided with anti-slip ribs.

[0004] However, existing copper terminal blocks have some shortcomings in use and still need to be improved: First, in wind power generation systems, the reliability of electrical connections directly affects the safety of the entire machine's operation and the efficiency of power transmission. Traditional terminals generally rely on bolt fastening or simple crimping to achieve cable connections. During long-term operation of the wind turbine, under the influence of complex dynamic stresses such as strong wind loads, tower swaying, and mechanical vibrations, problems such as loose connections, poor contact, and even cable detachment are prone to occur, seriously threatening system safety.

[0005] Secondly, existing cold-pressed copper terminals only use equal-diameter cylindrical crimping tubes, lacking an effective locking mechanism for cables under multi-level stress conditions. Especially when facing cables of different diameters or harsh vibration environments, their gripping force and pull-out resistance are significantly insufficient, making it difficult to achieve long-term stable connections.

[0006] Furthermore, existing technologies lack guiding coordination and one-way self-locking functions, and displacement or detachment may still occur under frequent vibration or misoperation, failing to fundamentally guarantee the integrity and safety of the connection system. Therefore, we have made improvements and proposed a cold-pressed copper terminal block for wind turbine generator sets. Utility Model Content

[0007] The purpose of this utility model is to address the problems raised in the existing background technology. To achieve the above-mentioned purpose, this utility model provides the following technical solution: a cold-pressed copper terminal block for wind turbine generator sets, comprising a cold-pressed copper connecting tube for wind turbine generator sets, the cold-pressed copper connecting tube being connected to a cold-pressed copper connecting piece, the cold-pressed copper connecting piece having a copper connecting hole, and the cold-pressed copper connecting tube being connected to a terminal conductive connection assembly.

[0008] As a preferred technical solution of this utility model, the terminal conductive connection assembly includes a terminal conductive connection insulating protective shell, a copper pin base, a wiring conductive copper pin, a plug-in guide copper sleeve, and a copper socket base copper pin socket. The terminal conductive connection insulating protective shell is provided with a copper pin base, and a wiring conductive copper pin is connected to the copper pin base. The wiring conductive copper pin is inserted into the copper socket base copper pin socket of the plug-in guide copper sleeve.

[0009] As a preferred technical solution of this utility model, the inner surface of the terminal conductive connection insulating protective shell is provided with an internal thread of the insulating protective shell, and the outer surface of the copper needle base is provided with an external thread of the copper needle base connection, and the external thread of the copper needle base connection mates with the internal thread of the insulating protective shell.

[0010] As a preferred technical solution of this utility model, a sealing rubber ring is provided inside the conductive connection insulating protective shell of the terminal, and a limit stop ring is provided on the conductive connection insulating protective shell of the terminal.

[0011] As a preferred technical solution of this utility model, the side of the terminal conductive connection assembly is provided with a cable connection guide U-shaped ring plate, and the side of the cable connection guide U-shaped ring plate is provided with an anti-reverse locking protrusion.

[0012] As a preferred technical solution of this utility model, the side of the anti-reverse locking protrusion is provided with a guide slope, and the side of the guide slope is provided with a gradually changing diameter pressing piece.

[0013] As a preferred technical solution of this utility model, the end of the gradient diameter pressing sheet is provided with a flared edge, and the gradient diameter pressing sheet and the flared edge are provided with deformation reserved grooves.

[0014] As a preferred technical solution of this utility model, a narrow anti-detachment pressure recess is provided at the connection between the gradient diameter pressing sheet and the flared edge of the horn mouth.

[0015] As a preferred technical solution of this utility model, the outer surfaces of the tapered diameter pressing sheet and the flared mouth are provided with a pressing sheet protective sleeve.

[0016] As a preferred technical solution of this utility model, the protective sleeve of the crimping sheet is connected to the conductive connection insulating protective outer shell of the terminal.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model adopts an integral copper structure, and the key conductive components such as the cold-pressed copper pipe, cold-pressed copper connecting piece, and conductive copper pin of the wind turbine generator are all made of high-purity copper. Combined with the tight cold pressing process and the pin and socket docking, the contact resistance is effectively reduced, the operating temperature rise is reduced, and the power transmission efficiency is improved.

[0018] This utility model features a composite structure combining a gradually changing diameter crimping plate with a flared edge, a deformation pre-reserved groove, and a narrow anti-detachment crimping recess. This structure enables multi-level locking of the cable during the cold pressing process, significantly enhancing gripping force and pull-out resistance, and effectively preventing the cable from loosening or falling off due to long-term vibration of the fan.

[0019] The cable connection guide U-shaped ring plate and the anti-retrieval locking hook work together with the guide slope to achieve one-way self-locking, effectively preventing the terminal from accidentally coming off during operation and greatly improving the safety of system operation. Attached Figure Description

[0020] Figure 1 A top view of the structure provided for this utility model; Figure 2 This is a schematic diagram of the main structure provided for this utility model; Figure 3 Provided by this utility model Figure 2 Schematic diagram of the three-dimensional structure of AA; Figure 4 Provided by this utility model Figure 2 Schematic diagram of the three-dimensional structure of BB; Figure 5 This is a schematic diagram of the internal structure of the terminal conductive connection assembly provided by this utility model; Figure 6 Provided by this utility model Figure 2 Schematic diagram of the three-dimensional structure of CC.

[0021] The image shows: 1. Cold-pressed copper connector for wind turbine generator set; 2. Cold-pressed copper connector; 3. Copper connector hole; 4. Terminal conductive connection assembly; 401. Terminal conductive connection insulating protective housing; 4011. Insulating protective housing internal thread; 402. Copper pin base; 4021. Copper pin base connection external thread; 403. Wiring conductive copper pin; 404. Insertion and removal guide copper sleeve; 405. Copper socket base copper pin socket. 5. Sealing rubber ring; 6. Limiting retaining ring; 7. Cable connection guide U-shaped ring plate; 8. Anti-reverse locking hook; 9. Guide slope; 901. Gradient diameter crimping plate; 10. Flared edge; 11. Deformation reserved groove; 12. Narrow anti-detachment crimping recess; 13. Crimping plate protective sleeve. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0023] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely illustrates some embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model. It should be noted that, in the absence of conflict, the embodiments and features and technical solutions in the embodiments of this utility model can be combined with each other. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] Example 1: A cold-pressed copper terminal block for wind turbine generator sets includes a cold-pressed copper connector tube 1, which is connected to a cold-pressed copper connector piece 2. The cold-pressed copper connector piece 2 has a copper connector hole 3. The cold-pressed copper connector tube 1 is connected to a terminal conductive connection assembly 4. The terminal conductive connection assembly 4 includes a terminal conductive connection insulating protective housing 401, a copper pin base 402, a conductive copper pin 403, a insertion / removal guide copper sleeve 404, and a copper pin insertion hole 405 in the copper insertion hole base. The copper pin base 402 is disposed inside the terminal conductive connection insulating protective housing 401. The conductive copper pin 403 is connected to the copper pin base 402 and is inserted into the copper pin insertion hole 405 in the copper insertion hole base of the insertion / removal guide copper sleeve 404.

[0025] The inner surface of the terminal conductive connection insulating protective housing 401 is provided with an internal thread 4011, and the outer surface of the copper pin base 402 is provided with an external thread 4021, which mates with the internal thread 4011. A sealing rubber ring 5 is provided inside the terminal conductive connection insulating protective housing 401, and a limit ring 6 is provided on the terminal conductive connection insulating protective housing 401. A cable connection guide U-shaped ring plate 7 is provided on the side of the terminal conductive connection assembly 4, and an anti-reverse locking hook 8 is provided on the side of the cable connection guide U-shaped ring plate 7.

[0026] The anti-retrieval locking hook 8 has a guide slope 9 on its side, and a tapered diameter crimping piece 901 is provided on the side of the guide slope 9. The end of the tapered diameter crimping piece 901 has a flared edge 10, and a deformation pre-reserved groove 11 is formed between the tapered diameter crimping piece 901 and the flared edge 10. A narrow anti-disengagement crimping recess 12 is provided at the connection between the tapered diameter crimping piece 901 and the flared edge 10. A crimping piece protective sleeve 13 is provided on the outer surface of the tapered diameter crimping piece 901 and the flared edge 10. The crimping piece protective sleeve 13 is connected to the terminal conductive connection insulating protective housing 401.

[0027] The working principle of cold-pressed copper terminals for wind turbine generators: The cable core to be connected is inserted into the copper terminal hole 3, and the copper tube 1 is firmly pressed to the core through a cold-pressing process. The cold-pressed copper terminal piece 2 is integrally formed with the copper tube 1 or fixedly connected by cold pressing. The terminal conductive connection assembly 4, as the core plug-in structure, undertakes the functions of quick plugging and unplugging and stable conductivity. Among them, the copper pin base 402 is screwed into the internal thread 4011 of the insulating protective shell 401 on the inner wall of the terminal conductive connection insulating protective shell 401 through the copper pin base connecting external thread 4021 on its outer surface, realizing a detachable and tight connection between the two, while ensuring good coaxiality and structural stability. The connecting conductive copper pin 403 is fixed on the copper pin base 402 and extends axially, inserting into the plugging and unplugging guide copper sleeve 404 of the mating end, and accurately embedding into the copper pin socket 405 of the copper socket base inside, thereby establishing an electrical connection path.

[0028] The terminal conductive connection insulating protective housing 401 is provided with a sealing rubber ring 5 inside, which is compressed during the tightening of the copper needle base 402 to form an effective seal; the limiting ring 6 is used to limit the axial displacement of the internal components to prevent the structure from loosening due to vibration or thermal expansion and contraction.

[0029] On the cable entry side, the cable connection guide U-shaped ring plate 7 provides cable routing guidance. Its side-integrated anti-retraction locking hook 8 can be engaged with the corresponding structure after crimping to prevent the terminal from accidentally coming out. The edge of the anti-retraction locking hook 8 is provided with a guide slope 9 to facilitate smooth insertion during assembly. The gradually decreasing diameter crimping piece 901 connected to it deforms under force during cold pressing, and its gradually decreasing structure achieves uniform compression from large to small, improving the fit and grip with the cable.

[0030] The end of the tapered diameter crimping piece 901 extends into a flared edge 10, which, together with the deformation pre-reserved groove 11 opened on both, allows space for deformation. A narrow anti-detachment crimping recess 12 is provided in the transition area between the flared edge 10 and the tapered diameter crimping piece 901 to further increase the local crimping force and prevent cable slippage.

[0031] The entire crimping area is covered by a crimping sheet protective sleeve 13. This sleeve not only provides insulation protection to prevent external short circuits or corrosion, but also forms an integrated protective structure through its connection with the terminal conductive connection insulating protective housing 401, thereby improving the overall mechanical strength and environmental adaptability.

[0032] The working process of cold-pressed copper terminals for wind turbine generator sets is as follows: First, strip the outer insulation of the multi-strand copper core cable of the wind turbine generator set to expose the conductor core of a specified length. Insert the prepared conductor core through the protective sleeve 13 of the crimping plate, then sequentially through the flared edge 10, the tapered diameter crimping plate 901, and the cable connection guide U-shaped ring plate 7, finally inserting it into the inner cavity of the cold-pressed copper terminal tube 1 of the wind turbine generator set, ensuring the conductor core is fully in place.

[0033] Radial pressure is applied to the area of ​​the cold-pressed copper pipe 1 and the connected tapered diameter crimping plate 901 of the wind turbine generator set using a specialized cold-pressing tool. During the crimping process: The tapered diameter crimping piece 901 has a gradually decreasing diameter, and shrinks uniformly after being pressed to tightly wrap the wire core, forming a mechanical connection with high conductivity and high tensile strength; the flared edge 10 curls inward under pressure and further adheres to the surface of the wire core; the deformation pre-reserved groove 11 provides space for deformation. The narrow anti-slip indentation 12 forms a high-stress indentation in a localized area, significantly improving the anti-slip capability; after crimping, the crimping sheet protective sleeve 13 covers the entire crimping area, providing insulation and corrosion protection.

[0034] Connect the pre-crimped copper connector tube 1 of the wind turbine generator set to the terminal conductive connection assembly 4. Screw the copper pin base 402 into the internal thread 4011 of the insulating protective housing 401 on the inner wall of the terminal conductive connection insulating protective housing 401 through the external thread 4021 of the copper pin base connection on its outer surface, until the limiting ring 6 abuts against the end face of the copper pin base 402 to achieve axial limiting. At the same time, the sealing rubber ring 5 is compressed between the two to form a sealing barrier to prevent moisture and dust from entering.

[0035] The conductive copper pin 403 is fixed inside the insulating protective housing 401 along with the copper pin base 402 and extends axially. When the terminal is mated with the matching socket, the conductive copper pin 403 is precisely inserted into the copper pin socket 405 of the copper socket base of the insertion guide copper sleeve 404, achieving fast and non-destructive insertion under the action of the guide structure, and establishing a low-resistance conductive path.

[0036] Throughout the entire process, the cable connection guide U-shaped ring plate 7 constrains the cable routing and reduces bending stress; its side anti-reverse locking hook 8 engages with the corresponding slot of the equipment mounting base, and works with the guide slope 9 to achieve one-way locking, preventing the terminals from loosening due to fan vibration.

[0037] The crimping tab protective sleeve 13 is firmly connected to the terminal conductive connection insulating protective housing 401 to form a continuous external protective layer, ensuring that the terminal maintains stable electrical performance and reliable mechanical connection throughout the entire life cycle of the wind turbine generator set.

[0038] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, the present utility model is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present utility model, and all technical solutions and improvements that do not depart from the spirit and scope of the utility model, are covered within the scope of the claims of the present utility model.

Claims

1. A cold-pressed copper terminal block for wind turbine generator sets, comprising a cold-pressed copper connector (1) for wind turbine generator sets, characterized in that, The cold-pressed copper pipe (1) of the wind turbine generator set is connected to the cold-pressed copper connector (2), and the cold-pressed copper connector (2) is provided with a copper connector hole (3). The cold-pressed copper pipe (1) of the wind turbine generator set is connected to the terminal conductive connection assembly (4).

2. The cold-pressed copper terminal block for wind turbine generator sets according to claim 1, characterized in that, The terminal conductive connection assembly (4) includes a terminal conductive connection insulating protective housing (401), a copper pin base (402), a wiring conductive copper pin (403), a plug-in guide copper sleeve (404), and a copper pin socket base copper pin socket (405). The terminal conductive connection insulating protective housing (401) is provided with a copper pin base (402), and a wiring conductive copper pin (403) is connected to the copper pin base (402). The wiring conductive copper pin (403) is inserted into the copper pin socket base copper pin socket (405) of the plug-in guide copper sleeve (404).

3. The cold-pressed copper terminal block for a wind turbine generator set according to claim 2, characterized in that, The inner surface of the terminal conductive connection insulating protective housing (401) is provided with an insulating protective housing internal thread (4011), and the outer surface of the copper needle base (402) is provided with a copper needle base connection external thread (4021). The copper needle base connection external thread (4021) and the insulating protective housing internal thread (4011) are engaged.

4. The cold-pressed copper terminal block for a wind turbine generator set according to claim 3, characterized in that, A sealing rubber ring (5) is provided inside the terminal conductive connection insulating protective housing (401), and a limit stop ring (6) is provided on the terminal conductive connection insulating protective housing (401).

5. A cold-pressed copper terminal block for a wind turbine generator set according to claim 4, characterized in that, The terminal conductive connection assembly (4) is provided with a cable connection guide U-shaped ring plate (7) on its side, and the cable connection guide U-shaped ring plate (7) is provided with an anti-reverse locking protrusion (8) on its side.

6. A cold-pressed copper terminal block for a wind turbine generator set according to claim 5, characterized in that, The anti-reverse locking hook (8) has a guide slope (9) on its side, and the guide slope (9) has a tapered diameter pressing piece (901) on its side.

7. A cold-pressed copper terminal block for a wind turbine generator set according to claim 6, characterized in that, The end of the tapered diameter pressing piece (901) is provided with a flared edge (10), and the tapered diameter pressing piece (901) and the flared edge (10) are provided with deformation reserved grooves (11).

8. A cold-pressed copper terminal block for a wind turbine generator set according to claim 7, characterized in that, A narrow anti-detachment pressure recess (12) is provided at the connection between the tapered diameter pressing piece (901) and the flared edge (10).

9. A cold-pressed copper terminal block for a wind turbine generator set according to claim 8, characterized in that, The outer surfaces of the tapered diameter pressing sheet (901) and the flared edge (10) are provided with pressing sheet protective sleeves (13).

10. A cold-pressed copper terminal block for a wind turbine generator set according to claim 9, characterized in that, The crimping sheet protective sleeve (13) is connected to the terminal conductive connection insulating protective housing (401).

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