CN206379628U - One kind is used for busbar channel and switch disconnector attachment means in cabinet - Google Patents

Abstract

The utility model discloses a connection device, in particular to a connection device for a grooved busbar in a cabinet and a switch circuit breaker, which belongs to the technical field of power distribution switch cabinet devices; The insulation module press-fits the conductive plug-in row into the installation groove to form a plug-in channel, and also includes an outer sheath set on the insulation template for protection and reinforcement, and the insulation module passes through the outer sheath The housing is molded with conductive plug-in strips, and insulating partitions for isolation are arranged between the plug-in channels of each phase; the connection device of the utility model solves the problem of complicated circuits between the electrical connections in the switch cabinet, making the internal connection The unit is modularized, easy to assemble by plugging, and maintenance-free, which effectively optimizes the structure in the cabinet and reduces costs.

Description

A connection device for the grooved busbar in the cabinet and the switch circuit breaker

technical field

The utility model relates to a connection device, in particular to a connection device for a grooved busbar in a cabinet and a switch circuit breaker, and belongs to the technical field of power distribution switch cabinet devices.

Background technique

With the new round of power grid transformation and development, the upgrading and transformation of power transmission and distribution equipment, take the road of innovation-driven, intelligent manufacturing, and competition in differentiated technologies. Through new technologies, new processes, and new materials to optimize the design, develop compact plug-in technology connections The device makes the power transmission and distribution switchgear compact in structure, simple in assembly and convenient in maintenance, so as to realize the modular plug-in connection combination of switchgear and reduce the volume of switchgear. Reduce loss, reduce cost, safe and reliable performance, convenient installation and maintenance and other technologies.

The currently designed connection device is not only larger and more complex in structure, but also has a complicated connection with the connection unit, which is not conducive to operation. In order to avoid excessive carrying capacity, the main conductor of the connection device needs to be fully considered when setting The current-carrying capacity will make the entire device unable to fully utilize the materials used, and the weight of the connecting device cannot be better reduced.

Contents of the invention

The purpose of the invention of the present utility model is to provide a modular, plug-in type, easy to assemble, maintenance-free, used for the conductor main busbar and the switch and circuit breaker branch busbar in the switchgear slotted busbar. connecting device between.

The technical scheme that the utility model adopts is as follows:

A device for connecting a slotted busbar in a cabinet to a switch circuit breaker, comprising a plurality of insulating modules with installation slots and conductive plug-in strips. The insulating modules press-fit the conductive plug-in strips into the installation slots to form plug The connection channel also includes an outer sheath that is set on the insulation template for protection and reinforcement. The insulation module is used to form the conductive plug-in row through the outer sheath. Insulation barriers for isolation are provided between each phase of the plug-in channel. plate.

The utility model sets the conductive plug-in row in the installation groove of the insulating module through the outer shell, and has a simple structure and is easy to assemble. Excellent current-carrying performance, and effectively reduce the diversion temperature rise of the connector.

Further, the outer shell is integrally made of aluminum-magnesium alloy material. Adopting the unique design method can ensure the integrity of the connection device, and it has better protection and suit effect.

The utility model relates to a connection device between a slot-shaped busbar in a cabinet and a switch circuit breaker. A first elastic element for providing a pre-tightening force is also arranged between the conductive plug-in row and the insulating module. It is beneficial to have a certain pre-tightening force after the busbar is inserted into the plug-in device, so that the conductive plug-in strip and the busbar are closely attached.

Further, there are four first elastic elements, which are symmetrically arranged on both sides of the conductive plug-in row. It can make the splicing row bear the force evenly up and down, and ensure better plugging effect of the connecting units at both ends of the connecting device.

The utility model relates to a connecting device for a slot-shaped busbar in a cabinet and a switch circuit breaker, wherein a second elastic element is arranged between the conductive plug-in rows where the plug-in channels of each phase are located. Ensure that the conductive plug-in row where the plug-in interface is located in the initial state of the connecting device has sufficient spacing for busbar insertion, protect the conductive plug-in row and provide appropriate pulling force after plugging.

Further, the second elastic element is arranged in the middle of the insertion channel.

The utility model is a device for connecting the slot-shaped busbar in the cabinet and the switch breaker, which also includes flexible insulating and sealing sheaths with telescopic properties that are set at both ends of the jacket shell, and is used to meet the requirements of the slot-shaped busbar due to the degree of insertion or External insulation protection that causes linear expansion and contraction due to thermal expansion.

Further, the expansion and contraction amount of the flexible sealing sheath is not less than 10mm. Fully guarantee the linear expansion and contraction of the trough busbar caused by thermal expansion.

The utility model is a connection device for the slot-shaped busbar in the cabinet and the switch circuit breaker. The insulating partition is provided with a groove for increasing creepage distance and heat dissipation. One end of the first elastic element is connected to the conductive plug-in row, and the other is One end is connected to the side of the boss. It can not only simplify the installation of the elastic element but also meet the increased creepage distance.

Further, the increased creepage distance of the groove is not less than 15mm. This distance is sufficient to ensure that the interfering effect between phases is minimized.

Further, the pitches of the conductive plug-in rows where the plug-in channels of each phase are located are different, so as to avoid wrong plug-in directions. According to the size of the current carrying capacity, the spacing of the plug-in channels is designed to be different, so as to realize different phases and have dedicated plug-in channels to avoid wrong plug-in directions.

In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

1. Modular combination structure, high mechanical strength, simple assembly and maintenance-free;

2. Plug-in technology, the connection part does not need to be fixed by bolts, the contact cross-section is large, the conductor flow capacity is better guaranteed, and it has good electrical and mechanical properties;

3. The conductive section of the connection part is large, the resistivity is low, the loss is small, the current carrying capacity is large, and the temperature rise is low, ensuring the electrical performance consistency of the overall electrical equipment;

4. The electrical insulation performance is strong, and the flame-retardant high-strength insulating material is used to isolate the phases. The long-term heat resistance is 150 ° C. The outer sheath adopts an electrical rubber sleeve insulating material stacked telescopic sealing structure to avoid local occurrence at the connection. Discharge, protection against contact voltage of foreign objects, etc.;

5. The plug-in device of this utility model adopts the double-head torque bus connection technology. The special double-head torque is easy to connect the clamping force required by the unit, ensuring the pressure of the joint, and the connection is naturally matched without mechanical stress;

6. The connection part adopts plug-in double-sided lap joint, which increases the cross-section of the conductor, ensures that the connection part has good current-carrying performance, and effectively reduces the diversion temperature rise of the connector;

7. The connection device of the utility model has the property of non-reversibility, which avoids phase error during bus connection, and ensures safer use.

Description of drawings

Figure 1 is a schematic diagram of the connection of the connection device used in the switch cabinet;

Fig. 2 is the structural representation of the connecting device of the present utility model;

Fig. 3 is a cross-sectional view at A;

Fig. 4 is a schematic diagram of a cross-sectional structure of an insulating partition.

Marks in the figure: 1-insulation module, 2-conductive plug-in row, 3-first elastic element, 4-second elastic element, 5-outer shell, 6-flexible insulating sealing sleeve, 7-groove, 8- Insulation partition, 9-plug channel.

detailed description

Below in conjunction with accompanying drawing, the utility model is described in detail.

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

Example 1

A device for connecting a slotted busbar in a cabinet to a switch circuit breaker, as shown in Figure 2, includes a plurality of insulating modules 1 with installation slots and conductive plug-in bars 2, and the insulating modules 1 connect the conductive plug-in bars 2 It is press-fitted in the installation groove and forms a plug-in channel 9, and also includes an outer casing 5 set on the insulating template for protection and reinforcement, and the insulating module 1 forms the conductive plug-in row 2 through the outer casing 5. , Insulation partitions 8 for isolation are arranged between the plug-in channels 9 of each phase.

Specifically, as shown in Figure 3, the insulation module 1 includes a half "worker" for the end and a "worker" shaped insulation module for the conductive plug-in row 2, and the upper and lower inner walls of the "worker" are arranged symmetrically There are installation slots for the positioning of the conductive plug-in strips. The insulating module 1 press-fits the conductive plug-in strips 2 into the installation slots, and then fixes them through the outer casing 5. It has a simple structure and is easy to assemble. The connection part adopts plug-in The double-sided lap connection increases the cross-section of the conductor, ensures that the connection part has good current-carrying performance, and effectively reduces the diversion temperature rise of the connector. In the above-mentioned embodiments, the connection device adopts this design without using bolts for fixing and assembly, its practicability is further reflected, and it is more suitable for switch cabinets, and it has more advantages in simplifying the structural design and layout of switch cabinets. Advantage.

In this embodiment, specifically, the outer casing 5 is integrally made of magnesium-aluminum alloy. The connection device is made more integrated, and the safety of the connection device is improved at the same time.

When the design of the above-mentioned embodiment is adopted, the performance of the conductive plug-in strip 2 will decrease after long-term use, and the effect of ensuring the pre-tightening force against its own elasticity is not good. In order to improve such defects, in another specific embodiment, A first elastic element 3 for providing pre-tightening force is also arranged between the conductive plug-in row 2 and the insulating module 1 . Through such a design, it can be ensured that the conductive plug bar 2 is attached to the grooved bus bar under a certain pressure after being plugged in, and there is enough distance between the conductive plug bar 2 and the insulating module 1 for heat dissipation. There is no limit to the installation method, for example, the two ends of the elastic element can be respectively fixedly connected to the insulating module 1 and the conductive plug bar 2 . In one specific embodiment, the insulating module 1 and the conductive plug-in row 2 are provided with positioning holes for the positioning of the first elastic element 3 for further optimization. Preferably, the first elastic element 3 There are 4 pieces, which are arranged symmetrically on both sides of the conductive plug-in row 2 respectively.

Under the design principle of the above-mentioned specific embodiment, when the connecting device is in the initial state, the distance between the conductive plug-in strips 2 is small due to the force. In an embodiment, a second elastic element 4 is further arranged between the conductive plug-in rows where the plug-in channels of each phase are located. It is used to provide tension and make the conductive plug-in strip 2 have an appropriate spacing in the initial state, so as to facilitate plugging. Specifically, the second elastic element 4 is arranged in the middle of the insertion channel 9 . More specifically, springs are used with the second elastic element 4 .

Under the above-mentioned design principle, in another specific embodiment, as a further optimization of this design, the first elastic elements 3 can be symmetrically arranged on both sides of the conductive plug-in row 2 where the plug-in channel 9 is located, and The same conductive plug-in row 3 is arranged symmetrically up and down. Specifically, as a base number, there are eight first elastic elements 3 . Further, there are two second elastic elements 4, which are respectively symmetrically arranged at the upper and lower positions of the middle part of the conductive plug-in row 2 where the plug-in channel 9 is located.

Of course, in order to improve the safety performance of the connection device and increase the service life, in one of the specific implementations, a connection device for the slotted busbar in the cabinet and the switch circuit breaker of the present utility model also includes a casing 5 The flexible insulating and sealing sheath 6 with stretchability at both ends is used to meet the external insulation protection of the slot-shaped busbar due to the linear expansion and contraction caused by the degree of insertion or thermal expansion. Adopting this design can provide a certain amount of compensation. Preferably, the expansion and contraction of the flexible sealing sheath 6 is no less than 10mm. For example: 12mm, 15mm, or even 20mm. This design adopts 10mm, which can make full use of materials and save space.

In the above-mentioned specific embodiment, the two ends of the outer shell 5 are provided with slots for fitting the flexible insulating sealing sleeve 6, and the flexible insulating sealing sleeve 6 is directly fitted on the two ends of the outer shell 5 by pressing. In this way, the external insulation protection used to meet the linear expansion and contraction of the grooved busbar due to the degree of insertion or thermal expansion is realized. In another specific embodiment, the outer casing 5 is provided with a boss, and the flexible insulating sealing sleeve 6 is provided with a step for matching with the boss provided on the outer casing 5. Flexibility enables assembly.

When used as a power distribution device in a switch cabinet, the connection device also needs to consider the mutual influence between phases. In order to prevent the insulating material from being polarized, in one specific embodiment, the insulating partition 8 is provided with a useful Grooves for increased creepage distance and heat dissipation. It is beneficial to the heat dissipation of the connecting device during the practical process. Certainly, the creepage distance has certain requirements, therefore, the creepage distance increased by the concave/convex grooves is not less than 15 mm. You can choose 15mm as the set value, which can make the connecting device more compact, as shown in Figure 1. Specifically, the insulating partition 8 between the phase-to-phase insertion channel 9 is made of flame-retardant high-strength insulating material. Long-term heat resistance up to 150°C.

With the above-mentioned implementation, after the plug-in connection device is plugged into the connection unit, the overall safety performance is higher, and it can overcome the connection leakage caused by plug-in and linear expansion, which not only optimizes the internal structure of the switch cabinet, It also improves the safety and practicality of the connecting device.

In the assembly process, if a symmetrical design is used to avoid the reverse assembly direction of the device, it is necessary to design the specifications of the main conductor according to the maximum current carrying capacity. This method not only increases the weight of the device but also consumes more materials. Therefore, In another specific embodiment, the pitches of the conductive plug-in rows 2 where the plug-in channels 9 of each phase are located are different, so as to avoid wrong plug-in directions. The spacing of the plug-in channels is designed through the different current carrying capacity of different phases. Due to different specifications, the device cannot be assembled in one direction, nor can it be assembled, so it can reduce weight and save materials.

To sum up, adopting the utility model for connecting the grooved busbar in the cabinet and the switch circuit breaker has the following advantages:

1. Modular combination structure, high mechanical strength, simple assembly and maintenance-free;

2. Plug-in technology, the connection part does not need to be fixed by bolts, the contact cross-section is large, the conductor flow capacity is better guaranteed, and it has good electrical and mechanical properties;

3. The conductive section of the connection part is large, the resistivity is low, the loss is small, the current carrying capacity is large, and the temperature rise is low, ensuring the electrical performance consistency of the overall electrical equipment;

4. The electrical insulation performance is strong, and the flame-retardant high-strength insulating material is used to isolate the phases. The long-term heat resistance is 150 ° C. The outer sheath adopts an electrical rubber sleeve insulating material stacked telescopic sealing structure to avoid local occurrence at the connection. Discharge, protection against contact voltage of foreign objects, etc.;

5. The plug-in device of this utility model adopts the double-head torque bus connection technology. The special double-head torque is easy to connect the clamping force required by the unit, ensuring the pressure of the joint, and the connection is naturally matched without mechanical stress;

6. The connection part adopts plug-in double-sided lap joint, which increases the cross-section of the conductor, ensures that the connection part has good current-carrying performance, and effectively reduces the diversion temperature rise of the connector;

7. The connection device of the utility model has the property of non-reversibility, which avoids phase error during bus connection, and ensures safer use.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (9)

1. A device for connecting slotted busbars in a cabinet to a switch circuit breaker, characterized in that it includes a plurality of insulating modules (1) with installation slots and conductive plug-in strips (2), the insulating modules (1) Press-fit the conductive plug-in row (2) into the installation groove to form a plug-in channel (9), and also include an outer shell (5) set on the insulating template for protection and reinforcement, and the insulating module (1 ) through the jacket shell (5) to form the conductive plug-in row (2), and the insulating partitions (8) for isolation are arranged between the plug-in channels (9) of each phase. 2. The device for connecting the grooved busbar in the cabinet and the switch circuit breaker according to claim 1, characterized in that: there is a device between the conductive plug bar (2) and the insulation module (1) for providing Preload the first elastic element (3). 3. A connection device for a slotted busbar in a cabinet and a switch circuit breaker as claimed in claim 2, characterized in that: there are four first elastic elements (3), which are respectively symmetrically arranged on the conductive plug-in row (2) both sides. 4. A connection device for a slotted busbar in a cabinet and a switch circuit breaker according to claim 1, characterized in that: the plug-in channels (9) of each phase are located between the conductive plug-in rows (2). A second elastic element (4) is provided. 5. A connection device for a slotted busbar in a cabinet and a switch circuit breaker as claimed in claim 1, characterized in that it also includes a flexible insulating sealing sheath that is fitted on both ends of the jacket sheath (5) and has telescopic properties. The sleeve (6) is used to meet the external insulation protection of the grooved busbar due to the degree of insertion or thermal expansion caused by linear expansion and contraction. 6. A connection device for a channel-shaped busbar in a cabinet and a switch circuit breaker as claimed in claim 5, characterized in that the expansion and contraction of the flexible sealing sheath (6) is not less than 10mm. 7. A connection device for a slotted busbar in a cabinet and a switch circuit breaker according to claim 1 or 2, characterized in that: the insulating partition (8) is provided with a device for increasing creepage distance and heat dissipation groove (7). 8. The device for connecting the grooved busbar in the cabinet and the switch circuit breaker according to claim 7, characterized in that the creepage distance increased by the groove (7) is not less than 15mm. 9. A connection device for a slotted busbar in a cabinet and a switch circuit breaker as claimed in claim 1, characterized in that: the distances between the conductive plug-in rows (2) where the plug-in channels (9) of each phase are located are different. In order to avoid the wrong direction of plugging.