A cable quick connector assembly and a motor using the same

Abstract

The present invention relates to a quick cable joint assembly, which includes a male joint and a female joint, and the overall assembly is in an inverted "L" shape; the male joint includes a male joint housing, a locking copper column, a winding wire core terminal, a locking sheath, an insulating sheath, a bottom plate, an insulating layer and a fastening bolt; the female joint includes a female joint housing, an insulating layer, a locking bolt, a nut, an insulating sheath, a fastening sheath, a cable terminal, a fastening joint, a sheath joint, a locking nut retaining ring, a locking nut and a fastening bolt. The design of the present invention is simple, the connection is reliable and stable, the contact resistance between conductors is reduced, the efficiency of electrical connection is improved, the energy conduction loss is reduced, the speed of cable connection and disassembly is increased, and the work efficiency is enhanced.

Description

Technical Field

[0001] The present invention mainly relates to a high-power motor cable quick connector assembly in an LNG cryogenic re-liquefaction device, and is a structure and method for simplifying the connection device of a high-power motor. Background Art

[0002] Motors are an indispensable and important part of modern industry and have a wide range of application scenarios. With the acceleration of the industrialization process and the expansion of production scale, the demand for power equipment is increasing continuously. Motors need to provide powerful power output and stable operating characteristics to meet the power demand in industrial production. At the same time, with the improvement of energy conservation and environmental protection awareness and the continuous improvement of technology level, the design and manufacturing technology of high-power motors are also constantly innovating to improve energy utilization efficiency and reduce the impact on the environment.

[0003] The LNG evaporation gas re-liquefaction device uses the cold energy generated by nitrogen-helium compression and expansion to cryogenically cool LNG and spray it back into the tank to achieve the re-equilibrium liquefaction of BOG. As the core driving force of the whole set of equipment, the compression-expansion integrated motor needs to provide sufficient power for the equipment. Due to various requirements, the motor equipment needs to be frequently moved and disassembled, and the power cable provides the required power supply for the motor and needs to be frequently disassembled and assembled. Since the power cable of the integrated motor needs to carry high current, the diameter of the cable conductor is relatively large, resulting in poor flexibility and inconvenience in bending. This defect brings many inconveniences to the installation process, causes many troubles to the operators, and thus reduces the work efficiency. Due to frequent disassembly, the burden on workers is increased. Therefore, it is urgent to solve these problems to improve work efficiency and ensure the safe and smooth process of equipment disassembly and movement.

[0004] The prior art has studied the structure and method of motor connection devices, such as CN220754326U; Applicant: Hainan Youdi Electric Power Engineering Co., Ltd. The cable quick connector assembly proposed by Hainan Youdi Electric Power Engineering Co., Ltd. installs a strut at the connection position of the male connector and the female connector. A bracket is fixed on the strut, and a locking rod is provided on the sliding track of the bracket. An elastic mechanism is connected between the locking rod and the bracket, and the elastic mechanism can push the locking rod into the locking groove to fix the male connector and the female connector. The advantage of this method is that it is fast and simple, and can be used for outdoor temporary emergency wiring operations, but the secondary disassembly and assembly of the equipment is more troublesome. CN217882808U; Applicant: Guiyang Zhong'an Technology Group Co., Ltd. A cable quick connector proposed by Guiyang Zhong'an Technology Group Co., Ltd. This cable quick connector includes a first wire head clamp and a second wire head clamp, which are connected by an external screw, and is equipped with a metal head sleeve and a protective hose. The welding sleeve and the movable sleeve in the metal head sleeve are fixed by a clamping spring piece, and the protective hose can disperse the force, protect the joint position, and prevent the wire head from falling off. This connection method is suitable for cables with a small outer diameter, and at the same time does not consider that equipment vibration may cause the connection to loosen.

[0005] The above patents are troublesome to disassemble and assemble and are prone to looseness. Therefore, those skilled in the art are committed to researching a motor connection device with a simple structural design, reliable and stable connection, reduced contact resistance between conductors, improved electrical connection efficiency, reduced energy conduction loss, and at the same time improved the speed of cable connection and disassembly, and improved work efficiency. Summary of the Invention

[0006] The purpose of the present invention is to overcome the deficiencies in the existing motor connection devices in the prior art, and provide a new type of motor connection device and method. This device is aimed at the scenario where power cables need to be frequently disassembled and assembled, and can improve work efficiency, save space, reduce costs, and ensure the stability and safety of the connection. Compared with the traditional power cable wiring method, the design of the quick connector makes the connection and disassembly of the cable simpler, saves the space required for cable wiring, eliminates the cumbersome steps required by the traditional wiring method, saves working time, and ensures the stability of the connection through multiple fixed locking devices. At the same time, the sealing performance of the joint is enhanced, and the safety hazards caused by loose connection or poor contact are reduced.

[0007] To achieve the above object, the technical solution provided by the present invention is: A cable quick connector assembly, including a male connector and a female connector, characterized in that: type structure; The female connector is located at the upper part of the type structure, and the male connector is located at Type structure; the male connector includes a male connector housing (12), a locking copper post (13), a winding core terminal (14), a locking sheath (15), an insulating sheath I (16), a bottom plate (17), an insulating layer I (18), and a fastening bolt; a cavity (19) is provided inside the male connector housing (12), the insulating layer I (18) is placed inside the cavity (19), a conical through-hole (20) is machined at the bottom of the cavity (19) for connecting with the insulating sheath I (16), the insulating sheath I (16) is provided with a conical part corresponding to the conical through-hole, a through-hole is provided at the edge of the male connector housing (12), and the bolt is fixed to the bottom plate (17) through the through-hole; the female connector includes a female connector housing (1), an insulating layer II (2), a locking bolt (3), a nut (4), an insulating sheath II (5), a fastening sheath (6), a cable terminal (7), a fastening joint (8), a sheath joint (9), a locking nut retaining ring (10), a locking nut (11), and a fastening bolt; one end of the cable terminal (7) is connected to the cable, and the other end is fixed to the fastening joint (8). An insulating sheath II (5) is provided on the outer layer of the fastening joint (8) and the cable terminal (7), and a fastening sheath (6) is provided outside the insulating sheath II (5). A first guide groove (27) is provided at the connection between the female connector housing and the sheath joint (9). After the fastening sheath (6) is connected to the sheath joint (9), the sheath joint (9) is inserted into the first guide groove (27). An inner cavity (28) is provided inside the female connector (1), the insulating layer II (2) is placed in the inner cavity (28), a second guide groove (29) corresponding to the shape of the fastening joint (8) is machined on one side of the insulating layer II (2), and the fastening joint (8) is placed into the empty groove (30) of the insulating layer II (2) along the second guide groove (29).

[0008] Specifically, the locking copper post (13) is placed inside the insulating sheath I (16). One end of the locking copper post (13) is connected to the winding core terminal (14), and the other end extends out of the male connector housing (12) through the cavity (19).

[0009] Specifically, one end of the winding core terminal (14) is provided with an inner cavity (21) for connecting with the cable, the other end is connected to the locking copper post (13), the locking copper post (13) is provided with a threaded hole (22), and the winding core terminal (14) is fixed to the threaded hole (22) position of the locking copper post (13) through a bolt.

[0010] Specifically, a locking sheath (15) is provided outside the insulating sheath I (16), the locking sheath (15) is fixed to the bottom plate (17), and the bottom plate (17) is provided with a conical hole (23) corresponding to the conical part of the insulating sheath I (16).

[0011] Specifically, an accommodation groove (25) is provided on the outer diameter at the connection between the female connector and the male connector. The locking nut (11) and the locking nut retainer (10) are installed at the accommodation groove (25). A circle of locking threads (26) is provided at the accommodation groove (25) for fixing the locking nut retainer (10). When the locking nut (11) is placed along the accommodation groove (25) of the female connector to the fixed position, the locking nut retainer (10) is then locked onto the outer shell (1) of the female connector through the threads (26) to achieve the limitation of the locking nut 11.

[0012] Specifically, the locking contact surface (33) of the fastening connector (8) of the female connector is in contact with the end face of the locking copper column (13) of the male connector. The fastening connector (8) and the locking copper column (13) are firmly connected using the locking bolt (3). The nut (4) is installed on the outer shell (1) of the female connector to seal the inner cavity (28).

[0013] Specifically, the winding wire core terminal (14) is made of copper, the fastening sheath (6) is detachable, and the insulating sheath II (5) is made of rubber.

[0014] The present invention also includes a method of using the cable quick connector assembly according to any one of claims 1 - 7, comprising the following steps:

[0015] 1) Connect the stator winding copper wire of the motor and the winding wire core terminal (14), and then fix it to the male connector through bolts;

[0016] 2) Connect the power cable supplying power to the motor to the female connector in the quick connector assembly;

[0017] 3) Connect the male connector and the female connector to which the power cable is connected.

[0018] Specifically, when the male connector is connected to the female connector, the locking nut (11) moves along the outer diameter (31) of the outer shell (12) of the male connector and is connected through the external threads (32) on the outer diameter of the outer shell (12) of the male connector. After the threads are tightened, the locking contact surface (33) of the fastening connector (8) of the female connector is in contact with the end face of the locking copper column (13) of the male connector. Open the nut (4) of the female connector, and use the bolt (3) to firmly connect the fastening connector (8) and the locking copper column (13). After the connection is completed, install the nut (4) back onto the outer shell (1) of the female connector; when the cable quick connector needs to be disassembled, open the nut (4), after the locking bolt (3) is loosened, the locking nut (11) moves outward along the threads (32) of the outer shell of the male connector. After the threads are loosened, the male connector and the female connector are no longer in contact, and the quick connector is in the disconnected state.

[0019] The present invention also includes a motor, which includes the cable quick connector assembly according to any one of claims 1 - 7.

[0020] Compared with the prior art, the advantages of the present invention are as follows:

[0021] 1. Compared with the old wiring method, the present invention uses the mechanical structure of the "L"-type quick connector assembly for cable connection, which not only has a compact structure, but also improves the speed of cable connection and disassembly, saves workload and operation time, and improves work efficiency.

[0022] 2. Compared with the old wiring method, the mechanical structure design of the present invention is simple, reliable and firm, and the cooperation between components is tight, which improves the safety and durability of the connector. It is not only easy to use, but also can maintain good stability in various environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1A is the external structure diagram of the connector assembly;

[0024] Figure 1B is the internal structure diagram of the connector assembly;

[0025] Figure 2A is the external structure diagram of the male connector;

[0026] Figure 2B is the internal structure diagram of the male connector;

[0027] Figure 3A is the external structure diagram of the female connector;

[0028] Figure 3B is the internal structure diagram of the female connector;

[0029] Figure 4 is the structure diagram of the connector assembly in the disassembled state;

[0030] Figure 5 is the structure diagram of the connector assembly during the connection process;

[0031] Figure 6 is the structure diagram of the connector assembly in the combined state. DETAILED DESCRIPTION OF THE INVENTION

[0032] To further understand the content of the present invention, the present invention will be described in detail with reference to the accompanying drawings and embodiments.

[0033] The structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the conditions under which the present invention can be implemented. Therefore, they do not have a substantial technical meaning. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present invention. At the same time, terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of clear narration and are not used to limit the scope of implementation. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope in which the present invention can be implemented.

[0034] The present invention will be further described below in conjunction with embodiments.

[0035] The high-power motor cable quick-connector assembly consists of a male connector and a female connector. The overall assembly is in the shape of type structure, the female connector is located at the upper part of the type structure, the male connector is located at the lower part of the type structure, and a male connector and a female connector together form the type structure.

[0036] The male connector is as shown in Figure 1A 、 1B , Figure 2A 、 2BAs shown in the figure, it includes a male connector housing 12, a locking copper post 13, a winding core terminal 14, a locking sheath 15, an insulating sheath 16, a bottom plate 17, an insulating layer 18 and fastening bolts. A cavity 19 is provided inside the male connector housing 12. A tapered through hole 20 is machined at the bottom of the cavity 19 for connecting with the insulating sheath 16. Six through holes are provided in the male connector housing 12 and are fixed to the bottom plate 17 by bolts. The winding core terminal 14, as a connecting fitting between the motor stator winding and the joint assembly, is usually made of a material with good electrical conductivity, such as copper. Since the motor winding generally uses enameled wire, before the winding core is connected to the terminal 14, the insulating layer of the copper wire needs to be peeled according to the length of the inner cavity 21 of the terminal 14, and at the same time, the smoothness of the cut of the copper wire needs to be ensured. After the copper wire is cleaned, it is placed into the terminal 14, and a hydraulic crimper or other extrusion tool is used to extrude the inner cavity 21 part of the terminal 14 to ensure that the terminal 14 can be fully pressed together with the copper wire. The pressed terminal 14 needs to be fixed at the position of the threaded hole 22 of the locking copper post 13 by bolts. After the terminal 14 is fixed, an insulating sheath 16 is sleeved outside the locking copper post 13. After the insulating sheath 16 reaches the limit position, two metal locking sheaths 15 are buckled outside the insulating sheath 16, and the two metal locking sheaths 15 are connected and locked by bolts. The extrusion force between the two sheaths will cause the insulating sheath 16 to deform, so that the power cable will not shake or displace. After the locking sheath 15 is installed in place, the copper post 13 passes through the tapered hole 23 of the bottom plate 17, and the locking sheath 15 is fixed to the bottom plate 17 by bolts. The deformation of the insulating sheath 16 will occur during the process of bolt locking, increasing the sealing performance between the locking sheath 15 and the bottom plate 17 while fixing. After installing the locking sheath 15, the six through holes 24 provided in the male connector housing 12 are fixed to the bottom plate 17 by bolts. After all connections are completed, an insulating layer 18 is placed in the cavity 19 of the housing 12. The material of the insulating layer 18 can be selected from materials with high strength and good electrical insulation performance such as epoxy resin, providing insulation protection and increasing the overall structural strength at the same time.

[0037] The female connector is connected to the male connector, and the two components are arranged opposite to each other, such as Figure 1A 、 1B , Figure 3A 、 3BAs shown in the figure, the female connector includes a female connector housing 1, an insulating layer 2, a locking bolt 3, a nut 4, an insulating sheath 5, a fastening sheath 6, a cable terminal 7, a fastening joint 8, a sheath joint 9, a locknut retaining ring 10, a locknut 11 and a fastening bolt. An accommodation groove 25 is provided on the outer diameter at the connection between the female connector and the male connector. The locknut 11 and the locknut retaining ring 10 are installed at the accommodation groove 25 of the female connector. A locking thread 26 is provided at the accommodation groove 25 for fixing the locknut retaining ring 10. When the locknut 11 is placed along the outer diameter accommodation groove 25 of the female connector to the fixed position, the locknut retaining ring 10 is locked on the female connector housing 1 through the thread 26 to realize the limit of the locknut 11. Before the power cable is connected to the female connector, the cable needs to be cleaned according to requirements to ensure the smoothness and flatness between the copper wire and the cable terminal 7, preventing the cable from loosening after installation. After using a hydraulic tool to complete the extrusion of the terminal 7 and the cable, the cable terminal 7 is fixed on the fastening joint 8 through bolts. After installation, an insulating sheath 5 is sleeved on the outer layer of the fastening joint 8. After the sheath 5 is installed, a metal fastening sheath 6 is installed outside the insulating sheath 5. The fastening sheath 6 is detachable and can be fixed by bolts. The insulating sheath 5 can be made of rubber material. The two ends of the fastening sheath 6 are fastened by bolts. The insulating sheath 5 deforms due to pressure, which can realize the extrusion limit of the cable terminal 7 and the fastening joint 8, improving the stability of the cable connection. After the fastening joint 8, the fastening sheath 6 and the sheath joint 9 are connected, one end of the sheath joint 9 is placed into the inner cavity 28 of the female connector housing 1 along the guide groove 27 position of the female connector housing 1. Before installation, the insulating layer 2 needs to be placed in the inner cavity 28. A square guide groove 29 with the same shape as the fastening joint 8 is processed in advance on one side of the insulating layer 2. The fastening joint 8 is placed into the empty groove 30 of the insulating layer 2 along the insulating layer guide groove 29. When the insulating sheath 5 and the insulating layer 2 are in full contact, the sheath joint 9 and the female connector housing 1 are connected and fixed by bolts. A threaded through hole is left at the head of the female connector housing. When the male connector and the female connector are connected, the locking bolt 3 is placed to connect and fix the fastening joint 8 and the locking copper column 13. After the connection is completed, the nut 4 is sealed through the thread.

[0038] The usage method of the quick connector assembly is as Figures 4 - 6 shown.

[0039] When connecting the cable:

[0040] 1) Connect the copper wire of the stator winding of the motor to the terminal, and then fix it on the male connector through bolts;

[0041] 2) Connect the power cable supplying power to the motor to the female connector in the quick connector;

[0042] 3) Connect the male connector and the female connector with the power cable connected;

[0043] When disassembling the cable, the power supply should be disconnected first, and then the male connector and the female connector should be separated.

[0044] When the male connector is connected to the female connector, the locking nut 11 moves along the outer diameter 31 of the male connector housing 12 and is connected to the external thread 32 of the outer diameter of the male connector housing 12 through the locking nut 11. After the thread is tightened, the locking contact surface 33 of the fastening joint 8 of the female connector contacts the end face of the locking copper column 13 of the male connector. Open the nut 4 of the female connector, and use the bolt 3 to tightly connect the fastening joint 8 and the locking copper column 13. After the connection is completed, install the nut 4 back to the female connector housing 1 to seal the inner cavity 28. When the cable quick connector needs to be disassembled, open the nut 4. After the locking bolt 3 is loosened, the locking nut 11 moves outward along the external thread 32 of the male connector. After the thread is loosened, the male connector and the female connector are no longer in contact, and the quick connector is in the disconnected state.

[0045] The above has schematically described the present invention and its embodiments. This description is not restrictive. What is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and, without departing from the gist of the present invention, design similar structural modes and embodiments to this technical solution without creative efforts, they shall fall within the protection scope of the present invention.

Claims

1. A high-power cable quick connector assembly in an LNG cryogenic reliquefaction device, comprising a male connector and a female connector, characterized in that: The overall component Type structure; the female connector is located at The male connector is located at the upper part of the The lower part of the structure consists of a male connector and a female connector. The male connector comprises a male connector housing (12), a locking copper column (13), a winding wire core terminal (14), a locking sheath (15), an insulating sheath 1 (16), a bottom plate (17), an insulating layer 1 (18) and a fastening bolt; a cavity (19) is provided in the male connector housing (12), an insulating layer 1 (18) is placed in the cavity (19), a conical through hole (20) is machined at the bottom of the cavity (19) for connecting with the insulating sheath 1 (16), the insulating sheath 1 (16) is provided with a conical portion corresponding to the conical through hole, a through hole is provided at the edge of the male connector housing (12), and the bolt is fixed through the through hole The female connector comprises a female connector shell (1), an insulating layer (2), a locking bolt (3), a nut (4), an insulating sheath (5), a fastening sheath (6), a cable terminal (7), a fastening joint (8), a sheath joint (9), a locking nut retaining ring (10), a locking nut (11) and a fastening bolt; one end of the cable terminal (7) is connected to the cable and the other end is fixed to the fastening joint (8); an insulating sheath (2) (5) is provided on the outer layer of the fastening joint (8) and the cable terminal (7); a fastening sheath (6) is provided outside the insulating sheath (2) (5); the female connector shell and the fastening sheath are connected to each other. A first guide groove (27) is provided at the connection of the sleeve joint (9). After the fastening sleeve (6) is connected to the sleeve joint (9), the sleeve joint (9) is inserted into the first guide groove (27). An inner cavity (28) is provided inside the female joint housing (1). The second insulating layer (2) is placed in the inner cavity (28). A second guide groove (29) corresponding to the shape of the fastening sleeve (8) is processed on one side of the insulating layer (2). The fastening sleeve (8) is placed in the empty groove (30) of the second insulating layer (2) along the second guide groove (29). A locking sleeve (15) is provided outside the insulating sleeve (16). The locking sleeve (15) is fixed to the bottom plate (17). The bottom plate (17) is provided with a tapered hole (23) corresponding to the tapered portion of the insulating sheath (16); the outer diameter of the connection between the female connector and the male connector is provided with a receiving groove (25), the locking nut (11) and the locking nut retaining ring (10) are installed at the receiving groove (25), and the receiving groove (25) is provided with a circle of locking threads (26) for fixing the locking nut retaining ring (10). When the locking nut (11) is placed at a fixed position along the female connector receiving groove (25), the locking nut retaining ring (10) is locked on the female connector housing (1) through the threads (26), thereby limiting the locking nut (11).

2. The cable quick connector assembly according to claim 1, characterized in that: The locking copper column (13) is placed inside the insulating sheath (16), one end of the locking copper column (13) is connected to the winding core terminal (14), and the other end passes through the cavity (19) and extends out of the male connector housing (12).

3. The cable quick connector assembly according to claim 2, characterized in that: One end of the winding wire core terminal (14) is provided with an inner cavity (21) connected to the cable, and the other end is connected to the locking copper column (13). The locking copper column (13) is provided with a threaded hole (22). The winding wire core terminal (14) is fixed to the threaded hole (22) of the locking copper column (13) by bolts.

4. The cable quick connector assembly according to claim 1, characterized in that: The locking contact surface (33) of the fastening joint (8) of the female joint contacts the end surface of the locking copper column (13) of the male joint, and the fastening joint (8) and the locking copper column (13) are fastened together using a locking bolt (3). The nut (4) is installed on the female joint housing (1) to seal the inner cavity (28).

5. The cable quick connector assembly according to claim 1, characterized in that: The winding core terminal (14) is made of copper, the fastening sheath (6) is detachable, and the second insulating sheath (5) is made of rubber.

6. The method for using the cable quick connector assembly according to any one of claims 1 to 5, comprising the following steps: 1) Connect the stator winding copper wire of the motor to the winding core terminal (14), and then fix it to the male connector with bolts; 2) Connect the power cable that supplies power to the motor to the female connector in the quick connector assembly; 3) Connect the male connector and female connector of the power cable.

7. The method of use according to claim 6, characterized in that: When the male connector is connected to the female connector, the locking nut (11) moves along the outer diameter (31) of the male connector housing (12) and is connected to the outer thread (32) of the outer diameter of the male connector housing (12) through the locking nut (11). When the thread is tightened, the locking contact surface (33) of the fastening connector (8) of the female connector contacts the end surface of the locking copper column (13) of the male connector. The nut (4) of the female connector is opened and the fastening connector (8) and the locking copper column (13) are fastened and connected using the locking bolt (3). After the connection is completed, the nut (4) is installed back into the female connector housing (1). When the cable quick connector needs to be disassembled, the nut (4) is opened and the locking bolt (3) is loosened. The locking nut (11) moves outward along the outer thread (32) of the male connector. After the thread is loosened, the male connector and the female connector are no longer in contact and the quick connector is in a disconnected state.

8. A motor, comprising the cable quick connector assembly according to any one of claims 1 to 5.

Images