Cable joint of waterproof low-voltage cabinet

Abstract

The utility model discloses a cable joint of a water immersion prevention low-voltage cabinet, which relates to the technical field of low-voltage cabinets and comprises a first resin casting sleeve which is formed on a shell of the water immersion prevention low-voltage cabinet in a casting manner, a wiring busbar is embedded in the first resin casting sleeve, and two ends of the wiring busbar protrude out of the first resin casting sleeve; the wiring terminal is provided with a busbar connecting end and a cable connecting end, the busbar connecting end is fixedly connected with one end of the wiring busbar, and the cable connecting end is fixedly connected with a cable outside the cabinet; and the second resin casting sleeve and the first resin casting sleeve are connected into a whole, and the second resin casting sleeve wraps one end, connected with the wiring terminal, of the wiring busbar, the wiring terminal and part of the cable outside the cabinet. According to the utility model, the waterproof connection of the cable outside the cabinet can be realized without plugging a waterproof connector, and the connection cost of the cable outside the cabinet can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage switchgear technology, specifically to a cable connector for a waterproof low-voltage switchgear. Background Technology

[0002] Waterproof low-voltage switchgear inevitably requires connection to external cables (referred to as external cables). Currently, the common practice for connecting external cables to existing waterproof low-voltage switchgear is to create a through hole in the top of the switchgear casing and then install a pluggable waterproof connector in the through hole to achieve waterproofing while connecting the external cables.

[0003] However, in order to meet waterproof requirements, pluggable waterproof connectors require special sealing structure design and materials, which have higher manufacturing costs and are therefore relatively expensive, increasing the connection cost of external cables. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art. This utility model provides a cable connector for a waterproof low-voltage switchgear. Through the mutual cooperation of the first resin casting sleeve, the second resin casting sleeve, the wiring busbar and the wiring terminal, the waterproof connection of the external cable can be achieved without the need for plug-in waterproof connectors, which helps to reduce the connection cost of the external cable.

[0005] This utility model provides a cable connector for a waterproof low-voltage switchgear, which is installed on the housing of the waterproof low-voltage switchgear. The cable connector includes:

[0006] The first resin casting sleeve is cast into the shell of the waterproof low-pressure switchgear. A wiring busbar is embedded in the first resin casting sleeve, and the two ends of the wiring busbar protrude from the first resin casting sleeve.

[0007] The terminal block has a busbar connection end and a cable connection end. The busbar connection end is fixedly connected to one end of the wiring busbar, and the cable connection end is fixedly connected to an external cable.

[0008] The second resin casting sleeve is integrated with the first resin casting sleeve. The second resin casting sleeve wraps around one end of the wiring busbar that connects to the wiring terminal, the wiring terminal, and part of the external cable of the cabinet.

[0009] Specifically, the cable connector further includes a busbar support frame, the wiring busbar is inserted in the busbar support frame, and the busbar support frame is wrapped in the first resin casting sleeve.

[0010] Specifically, one end of the busbar support frame is provided with a first support leg, and the other end of the busbar support frame is provided with a second support leg. The first support leg and the second support leg are arranged along the length direction of the busbar support frame, the first support leg and the second support leg are parallel to each other, and the first support leg and the second support leg have the same orientation.

[0011] One end of the busbar support frame is also provided with a third support leg. The first support leg, the second support leg and the third support leg are located on the same plane, and the orientation of the third support leg is perpendicular to the orientation of the first support leg.

[0012] The first support leg has a first slot on its bottom, the second support leg has a second slot on its bottom, and the third support leg has a third slot on its bottom. The first slot, the second slot, and the third slot are located on the same plane and are used to engage the housing of the waterproof low-pressure cabinet.

[0013] Specifically, the wiring busbar includes an A-phase busbar, a B-phase busbar, a C-phase busbar, and an N-phase busbar, which are distributed at intervals along the horizontal direction.

[0014] Specifically, each of the A-phase busbar, the B-phase busbar, the C-phase busbar, and the N-phase busbar includes two sub-busbars spaced apart, the two sub-busbars being parallel to each other, and each sub-busbar being connected to two terminals.

[0015] Specifically, the busbar connection end has a flat structure, and the cable connection end has a cylindrical structure.

[0016] Specifically, both the exposed surfaces of the first resin casting sleeve and the second resin casting sleeve are coated with a hydrophobic paint layer.

[0017] Specifically, the busbar is a copper busbar and the terminals are copper terminals.

[0018] Specifically, the copper busbar and the copper terminal are fixedly connected by copper screws.

[0019] Specifically, the first resin casting sleeve is a first epoxy resin sleeve, and the second resin casting sleeve is a second epoxy resin sleeve.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] The cable connector of this waterproof low-voltage switchgear uses a first resin-cast sleeve to embed the busbar into the switchgear's casing. The busbar is then connected to external cables via terminals. A second resin-cast sleeve then wraps around one end of the busbar connecting to the terminals, the terminals, and part of the external cables. The first resin-cast sleeve is directly cast into the switchgear's casing without gaps, effectively preventing moisture from seeping into the switchgear from the cable connector, thus ensuring its waterproof performance. Simultaneously, the second resin-cast sleeve and the first resin-cast sleeve are integrated, completely enclosing the busbar connecting to the terminals, the terminals, and part of the external cables, making it water-resistant and reliable.

[0022] In summary, this utility model achieves waterproof connection of external cables by using the cooperation of the first resin casting sleeve, the second resin casting sleeve, the wiring busbar, and the wiring terminal, without the need for plug-in waterproof connectors, which helps to reduce the connection cost of external cables. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a first exploded structural diagram of the cable connector in an embodiment of this utility model;

[0025] Figure 2 This is a second exploded structural diagram of the cable connector in an embodiment of this utility model;

[0026] Figure 3 This is a three-dimensional structural diagram of the cable connector in an embodiment of this utility model;

[0027] Figure 4 This is a schematic diagram of the first structure of the busbar support frame in this embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the second structure of the busbar support frame in an embodiment of this utility model;

[0029] Figure 6 This is a three-dimensional structural diagram of the wiring terminal in an embodiment of this utility model.

[0030] In the attached diagram, 10 is the housing; 100 is the first resin-cast sleeve; 200 is the wiring busbar; 210 is the A-phase busbar; 220 is the B-phase busbar; 230 is the C-phase busbar; 240 is the N-phase busbar; 300 is the wiring terminal; 310 is the busbar connection end; 320 is the cable connection end; 400 is the external cable; 500 is the second resin-cast sleeve; 600 is the busbar support frame; 610 is the first support foot; 620 is the second support foot; and 630 is the third support foot. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0032] This utility model provides a cable connector for a waterproof low-voltage switchgear. Figure 1 This diagram shows a first exploded view of the cable connector in an embodiment of the present invention. Figure 2 This diagram shows a second exploded view of the cable connector in an embodiment of the present invention. Figure 3 This diagram shows a three-dimensional structural schematic of a cable connector in an embodiment of the present invention. The cable connector is mounted on the housing 10 of a waterproof low-voltage switchgear. The cable connector includes:

[0033] First resin casting sleeve 100, please refer to Figure 1 The first resin casting sleeve 100 is cast into the shell 10 of the waterproof low-pressure cabinet. A wiring busbar 200 is embedded in the first resin casting sleeve 100, and the two ends of the wiring busbar 200 protrude from the first resin casting sleeve 100.

[0034] Terminal block 300, please refer to Figure 1 and Figure 2 The terminal block 300 has a busbar connection end 310 and a cable connection end 320. The busbar connection end 310 is fixedly connected to one end of the wiring busbar 200, and the cable connection end 320 is fixedly connected to an external cable 400.

[0035] Second resin casting sleeve 500, please refer to Figure 2 and Figure 3 The second resin casting sleeve 500 and the first resin casting sleeve 100 are connected as one unit. The second resin casting sleeve 500 wraps one end of the wiring busbar 200 that connects to the wiring terminal 300, the wiring terminal 300, and part of the external cable 400.

[0036] The cable connector of this waterproof low-voltage switchgear uses a first resin-cast sleeve 100 to embed a busbar 200 into the housing 10 of the switchgear. The busbar 200 is then connected to an external cable 400 via a terminal block 300. A second resin-cast sleeve 500 then wraps around one end of the busbar 200 connected to the terminal block 300, the terminal block 300, and part of the external cable 400. The first resin-cast sleeve 100 is directly cast into the housing 10 of the waterproof low-voltage switchgear without gaps, effectively preventing moisture from entering the switchgear from the cable connector and ensuring its waterproof performance. Simultaneously, the second resin-cast sleeve 500 and the first resin-cast sleeve 100 are integrated, completely enclosing one end of the busbar 200 connected to the terminal block 300, the terminal block 300, and part of the external cable 400, making it resistant to water immersion and safe and reliable. This utility model achieves waterproof connection of external cable 400 by the cooperation of the first resin casting sleeve 100, the second resin casting sleeve 500, the wiring busbar 200 and the wiring terminal 300, without the need for plug-in waterproof connectors, which helps to reduce the connection cost of external cable 400.

[0037] Figure 4 A schematic diagram of the first structure of the busbar support frame in an embodiment of this utility model is shown. The cable connector further includes a busbar support frame 600, and the wiring busbar 200 passes through the busbar support frame 600. The busbar support frame 600 is wrapped in the first resin casting sleeve 100. The busbar support frame 600 can assist in supporting the wiring busbar 200, so that the wiring busbar 200 is neatly arranged and maintains a suitable spacing. At the same time, the busbar support frame 600 can prevent the wiring busbar 200 from shaking when casting the first resin casting sleeve 100.

[0038] Figure 5This diagram illustrates a second structural schematic of a busbar support frame according to an embodiment of the present invention. One end of the busbar support frame 600 is provided with a first support leg 610, and the other end is provided with a second support leg 620. The first support leg 610 and the second support leg 620 are arranged along the length of the busbar support frame 600, are parallel to each other, and face the same direction. A third support leg 630 is also provided at one end of the busbar support frame 600. The first support leg 610, the second support leg 620, and the third support leg 630 are located on the same plane, with the orientation of the third support leg 630 perpendicular to that of the first support leg 610. The first support leg 610 has a first slot at its base, the second support leg 620 has a second slot at its base, and the third support leg 630 has a third slot at its base. These slots are located on the same plane and are used to engage the housing 10 of the waterproof low-voltage switchgear. Using the first support leg 610, the second support leg 620, and the third support leg 630, the busbar support frame 600 can be easily and stably engaged in the through-hole of the waterproof low-voltage switchgear housing, thereby fixing the wiring busbar 200 in a suitable position, facilitating the casting of the first resin casting sleeve 100.

[0039] In some specific embodiments, please refer to Figure 4 The busbar 200 includes an A-phase busbar 210, a B-phase busbar 220, a C-phase busbar 230, and an N-phase busbar 240, which are distributed horizontally at intervals. This is to accommodate a three-phase four-wire line connection method. In low-voltage distribution networks, transmission lines generally adopt a three-phase four-wire line method, where three lines represent phases A, B, and C respectively, and the other is the neutral line N. Therefore, the A-phase busbar 210 is used to connect the A-phase lines, the B-phase busbar 220 is used to connect the B-phase lines, the C-phase busbar 230 is used to connect the C-phase lines, and the N-phase busbar 240 is used to connect the neutral line N.

[0040] For details, please refer to Figure 2 and Figure 4 Each of the A-phase busbar 210, B-phase busbar 220, C-phase busbar 230, and N-phase busbar 240 includes two spaced-apart sub-busbars, which are parallel to each other. Each sub-busbar is connected to two terminals 300. This not only improves the current transmission capacity of each phase busbar but also enhances its heat dissipation performance, thus ensuring the stability and safety of the busbar 200 during operation.

[0041] Figure 6 A three-dimensional structural schematic diagram of the wiring terminals in an embodiment of the present invention is shown. The busbar connection end 310 has a flat structure, which facilitates connection with the wiring busbar 200; the cable connection end 320 has a cylindrical structure, which facilitates connection with the external cable 400.

[0042] In some specific embodiments, please refer to Figure 3 Both the exposed surfaces of the first resin casting sleeve 100 and the second resin casting sleeve 500 are coated with a hydrophobic paint layer, which can prevent water droplets from adhering and further improve the waterproof performance of the cable joint.

[0043] In some specific embodiments, the busbar 200 is a copper busbar and the terminal block 300 is a copper terminal. The contact resistance between the copper busbar and the copper terminal is small, which can form an excellent electrical connection and reduce current loss.

[0044] Furthermore, the copper busbar and the copper terminal are fixedly connected by copper screws. The conductivity of the copper screws matches that of the copper busbar and the copper terminal, which can ensure the continuity and stability of the electrical connection and further reduce current loss at the connection.

[0045] In some specific embodiments, the first resin casting sleeve 100 is a first epoxy resin sleeve, and the second resin casting sleeve 500 is a second epoxy resin sleeve. Epoxy resin has high mechanical properties, strong adhesion, low curing shrinkage, excellent chemical resistance, good stability, and good processability. It can tightly wrap the wiring busbar 200, wiring terminals 300, some external cables 400, and the partially waterproof low-voltage cabinet shell 10 for a long time, effectively preventing moisture intrusion.

[0046] The cable connector of this waterproof low-voltage switchgear uses a first resin-cast sleeve 100 to embed a busbar 200 into the housing 10 of the switchgear. The busbar 200 is then connected to an external cable 400 via a terminal block 300. A second resin-cast sleeve 500 then wraps around one end of the busbar 200 connected to the terminal block 300, the terminal block 300, and part of the external cable 400. The first resin-cast sleeve 100 is directly cast into the housing 10 of the waterproof low-voltage switchgear without gaps, effectively preventing moisture from entering the switchgear from the cable connector and ensuring its waterproof performance. Simultaneously, the second resin-cast sleeve 500 and the first resin-cast sleeve 100 are integrated, completely enclosing one end of the busbar 200 connected to the terminal block 300, the terminal block 300, and part of the external cable 400, making it resistant to water immersion and safe and reliable. This utility model achieves waterproof connection of external cable 400 by the cooperation of the first resin casting sleeve 100, the second resin casting sleeve 500, the wiring busbar 200 and the wiring terminal 300, without the need for plug-in waterproof connectors, which helps to reduce the connection cost of external cable 400.

[0047] Moreover, the wiring busbar 200 is supported by the busbar support frame 600, which not only maintains a neat arrangement, but also allows for convenient and stable installation in the housing through hole of the waterproof low-voltage switchgear, facilitating the casting of the first resin casting sleeve 100.

[0048] In addition, the busbar 200 is a copper busbar, and the terminal block 300 is a copper terminal block, which are fixedly connected by copper screws. The matching is good, which can ensure the continuity and stability of the electrical connection and further reduce the current loss at the connection. The first resin casting sleeve 100 and the second resin casting sleeve 500 are both made of epoxy resin. Epoxy resin has high mechanical properties, strong adhesion, low curing shrinkage, excellent chemical resistance, good stability and good processability. It can tightly wrap the target for a long time and effectively prevent moisture intrusion.

[0049] The above provides a detailed description of a waterproof low-voltage switchgear cable connector provided by the embodiments of this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A cable connector for a waterproof low-voltage switchgear, installed on the casing of the waterproof low-voltage switchgear, characterized in that, The cable connector includes: The first resin casting sleeve is cast into the shell of the waterproof low-pressure switchgear. A wiring busbar is embedded in the first resin casting sleeve, and the two ends of the wiring busbar protrude from the first resin casting sleeve. The terminal block has a busbar connection end and a cable connection end. The busbar connection end is fixedly connected to one end of the wiring busbar, and the cable connection end is fixedly connected to an external cable. The second resin casting sleeve is integrated with the first resin casting sleeve. The second resin casting sleeve wraps around one end of the wiring busbar that connects to the wiring terminal, the wiring terminal, and part of the external cable of the cabinet.

2. The cable connector of the waterproof low-voltage switchgear as described in claim 1, characterized in that, The cable connector also includes a busbar support frame, in which the wiring busbar passes through the busbar support frame, and the busbar support frame is wrapped in the first resin casting sleeve.

3. The cable connector for the waterproof low-voltage switchgear as described in claim 2, characterized in that, One end of the busbar support frame is provided with a first support leg, and the other end of the busbar support frame is provided with a second support leg. The first support leg and the second support leg are arranged along the length direction of the busbar support frame. The first support leg and the second support leg are parallel to each other and have the same orientation. One end of the busbar support frame is also provided with a third support leg. The first support leg, the second support leg and the third support leg are located on the same plane, and the orientation of the third support leg is perpendicular to the orientation of the first support leg. The first support leg has a first slot on its bottom, the second support leg has a second slot on its bottom, and the third support leg has a third slot on its bottom. The first slot, the second slot, and the third slot are located on the same plane and are used to engage the housing of the waterproof low-pressure cabinet.

4. The cable connector of the waterproof low-voltage switchgear as described in claim 1, characterized in that, The wiring busbar includes an A-phase busbar, a B-phase busbar, a C-phase busbar, and an N-phase busbar, which are distributed at intervals along the horizontal direction.

5. The cable connector of the waterproof low-voltage switchgear as described in claim 4, characterized in that, The A-phase busbar, the B-phase busbar, the C-phase busbar, and the N-phase busbar each include two sub-busbars spaced apart, the two sub-busbars being parallel to each other, and each sub-busbar being connected to two terminals.

6. The cable connector of the waterproof low-voltage switchgear as described in claim 1, characterized in that, The busbar connection end has a flat structure, and the cable connection end has a cylindrical structure.

7. The cable connector for the waterproof low-voltage switchgear as described in claim 1, characterized in that, Both the exposed surfaces of the first resin casting sleeve and the second resin casting sleeve are coated with a hydrophobic paint layer.

8. The cable connector for the waterproof low-voltage switchgear as described in claim 1, characterized in that, The busbar is made of copper, and the terminals are made of copper.

9. The cable connector for the waterproof low-voltage switchgear as described in claim 8, characterized in that, The copper busbar and the copper terminal are fixedly connected by copper screws.

10. The cable connector of the waterproof low-voltage switchgear as described in claim 1, characterized in that, The first resin casting sleeve is a first epoxy resin sleeve, and the second resin casting sleeve is a second epoxy resin sleeve.

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