CN217427469U - Main circuit connection structure, removable plug-pull unit assembly and unit - Google Patents

Abstract

The utility model relates to a main circuit connection structure, plug unit assembly of formula of moving away and unit, main circuit connection structure includes the main circuit connector, circuit breaker and mutual-inductor, advance, the alternate center of the wiring end of the main circuit connector of each looks of the side of being qualified for the next round of competitions corresponds unanimous setting with the alternate center of the corresponding looks of circuit breaker, the B looks mutual-inductor suit of the side of being qualified for the next round of competitions is on corresponding looks main circuit connector, the wiring end of the B looks main circuit connector of the side of being qualified for the next round of competitions is located the place ahead of mutual-inductor with the tie point of being connected electrically conductive row. The beneficial effects are that: the circuit breaker is connected with the outgoing line side B-phase main circuit connector body in a reversing mode, the mutual inductor is sleeved in a lengthening mode, the limit that the connection distance of the 630A and 400A circuit breakers is shortened to 88mm is achieved, the distance between 250A and below is smaller than 88mm, the application of arranging the mutual inductor in a unit room with the whole current unit depth of 300mm is achieved, 53.5% of copper is saved, and the depth of a cabinet body is reduced by 200 mm.

Description

Main circuit connection structure, removable plug-pull unit assembly and unit

Technical Field

The utility model relates to a low pressure complete sets technical field, especially a main circuit connection structure, formula plug unit assembly and unit of withdrawable.

Background

The low-voltage complete equipment structure comprises three main circuit connecting structures of a fixed type, a drawer type and a fixed plug-in type.

Fixed plug-in main circuit connection structure: the connector of the breaker is connected with the bus punching hole to form a fixed connection structure, and the fault is taken out and repaired, as shown in fig. 17 and 18.

Drawer type main circuit connection structure: and (3) positioning at three positions of connection, test and separation, connecting a main circuit connector with a bus in an inserting mode, and overhauling without power failure, as shown in figure 16.

Fixed plug-in main circuit connection structure: breaker and base plug are connected, and the base punches fixed connection with the generating line, and the easy overheated burnout of spring plug of base has a power failure and just can demolish the base connection and overhaul the change.

The drawer type structure technology is derived from ABB, Schneider and Siemens, and the fixed plug type structure technology is derived from ABB, Schneider and Siemens foreign introduction technology.

The three connecting structures of fixed type, drawer type and plug-in type in the low-voltage equipment industry have corresponding market application shares. In recent 5 years, the application amount of the fixed plug-in type is gradually increased because 70% of industrial low-voltage equipment is power distribution equipment.

But fixed plug-in structure is only main circuit connection structure, does not connect, withdraws from the cooperation structure of operation, and the circuit breaker carries out erection joint through fastening screw and base, and when plug-in circuit breaker, because the inlet wire end is electrified, the security is poor, causes the emergence of personal injury accident easily.

In addition, the quality of the base and the structure of the base hard connection bus of manufacturers and users is uneven, and the operation reliability is poor and reflects greatly. The fixed plug-in structure is seemingly simpler than a drawer type structure, the cost is lower than that of the drawer type structure, the structure is that the fixed plug-in type structure is not provided with an operation matching device, the material consumption of metal plates is less, no operation function auxiliary part is provided, and the cost is low due to the loss of application functions. Once the fixed plug-in type has an overheat fault, the power failure maintenance probability is 80%, and the structural technology is unreliable.

The structure of the fixed plug-in base hard connection bus needs to occupy the unit depth of 450 mm-500 mm. The low-quality plug-in base has high overheating fault rate, but a small amount of bases manufactured by expensive brand original factories can generate overheating faults when in operation. The reason for adopting the fault is caused by the structural principle of the fixed plug-in main circuit connecting structure, and specifically comprises the following steps:

the structure of the fixed plug-in base is determined aiming at the interphase center of the matched circuit breaker, the interphase center of the base is consistent with the interphase center of the circuit breaker, the interphase center of the circuit breaker is small, the interphase center of the base is also small, the center of a spring plug of the base is also small, the current-carrying capacity of a plug-in section is insufficient, the current of the matched circuit breaker can only reach 85% basically, if the process of a manufacturing plant is slightly poor, the temperature rise can exceed the standard in operation, and in practical operation, the base is overheated and occurs unless the capacity reduction coefficient is large.

The base of fixed plug-in and bus hard link, the A, B, C three-phase of bus need punch in different positions, and is time-consuming and laborious, and erection joint spare all will go on the cabinet body, arranges behind the mutual-inductor board to bring the time-consuming and labour-consuming of manufacturing the installation.

The circuit breaker of fixed plug-in structure adopts the manpower to insert the base, and working strength is high, and unit people will lie prone on the ground to go the installation under the cabinet. If the base needs to be replaced, the circuit breaker is also very difficult to pull, and the circuit breaker can be replaced in a power failure mode basically.

The drawer type main circuit connecting structure is applied to the power distribution loop, the position interlocking function is achieved, the operation and connection mode is quick and convenient, the power distribution loop is defined in a standard mode, the position testing function is not needed, only the position connecting and isolating function is needed, and industrial users are prone to the fact that power distribution equipment does not select drawer type structures, and the main reason is that the drawer type cost is higher than that of a plug-in type structure.

The power distribution circuit is defined by the standard: the main circuit is required to be overhauled without power outage when being connected with an operation fault, the connecting and isolating positions are mechanically positioned, and the door opening operation unit is convenient, safe and quick to operate. But the fixed plug-in structure can not completely realize the application target of maintenance without power failure in practical application.

In the conventional drawer type main circuit connection structure, the main circuit connectors can be connected corresponding to the interphase center of the breaker structure only through transition and turnover, and a mutual inductor is arranged, so that the consumption of the connecting conductive bars and the occupied depth of a unit assembly are large, as shown in fig. 16. And the mutual inductor can be arranged only when the distance between the rear end plate of the rack of the unit assembly and the rear end surface of the circuit breaker reaches 180 mm. The copper consumption of the drawer unit of 630A for connecting the conductive bars is 5.88kg, 2.88kg for 400A, 1.85kg for 250A and 1.0kg for 125A.

Patent document CN211790382U discloses a main circuit body reversing plug and a main circuit connection structure, in which a main circuit connector can be connected with a circuit breaker without using a flip-chip, and the lever boosting propulsion mechanism can be used for realizing the quick and easy plugging operation.

For the above disadvantages of the fixed plug-in main circuit connection structure, the related technical personnel in the industry, including the technical personnel in the operation of subway companies in Jiangsu region, are always seeking a novel main circuit connection structure technology, which can be operated quickly and safely, and can reduce the usage of connecting conductive bars and the occupation depth of unit assemblies as much as possible while satisfying the indoor arrangement of the transformer units (the arrangement behind the transformer unit is not reasonable), thereby realizing the reduction of cost.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the utility model provides a main circuit connection structure, plug unit assembly and unit of formula of moving apart, when satisfying mutual-inductor unit indoor arrangement, reduce the quantity of connecting the electrically conductive row and the depth of occupation of unit assembly as far as possible.

The utility model provides a technical scheme that its technical problem adopted is: a main circuit connection structure of low-voltage complete equipment comprises a main circuit connector, a circuit breaker and a mutual inductor, wherein three phases of the circuit breaker are specifically an A phase, a B phase and a C phase from top to bottom, the circuit breaker is connected with the main circuit connector of each phase of a wire inlet side and a wire outlet side through a connecting conductive bar, the interphase centers of the terminals of the main circuit connectors of each phase of the wire inlet side and the wire outlet side are correspondingly and consistently arranged with the interphase centers of the corresponding phases of the circuit breaker, the connecting conductive bar of the wire outlet side is L-shaped, the terminal of the main circuit connector of the B phase of the main circuit connector of each phase of the wire outlet side is in a middle position, is staggered with the terminals of the main circuit connectors of A, C two phases of the upper and lower positions in the vertical direction and is arranged in a triangle shape at the inner side, the L-shaped connecting conductive bar comprises a horizontal section for connecting the circuit breaker and a vertical section for connecting the terminals of the main circuit connectors, the B-phase mutual inductor on the outgoing line side is sleeved on the wiring end of the main circuit connector of the corresponding phase, the connection point of the wiring end of the B-phase main circuit connector on the outgoing line side and the connecting conductive bar is positioned in front of the B-phase mutual inductor, and the A, C two-phase mutual inductors on the outgoing line side are sleeved on the horizontal section of the connecting conductive bar of the corresponding phase and are positioned on the outer side of the B-phase connecting conductive bar.

Further, the mutual inductor of the B phase on the outgoing line side is installed through a mutual inductor installation support on the unit rack.

Further, the transformer mounting bracket is an L-shaped bracket, a vertical end plate of the L-shaped bracket is mounted on a rear end plate of the rack, and a horizontal end plate of the L-shaped bracket is a mounting base of the transformer.

Further, the terminals of the main circuit connectors of each phase on the incoming line side are arranged in a delta shape in which the terminals of the main circuit connectors of the B phase at the middle position are staggered with the terminals of the main circuit connectors of the A, C two phases at the upper and lower positions in the vertical direction.

Further limiting, the main circuit connectors of the A phase, the B phase and the C phase on the incoming line side are arranged in a layered mode from top to bottom, the phase distance of the plugging ends of the main circuit connectors of each phase in the horizontal direction is consistent with the phase distance of the bus and used for being connected with the bus in a plugging mode, and according to the current situation that the overall dimension of an applied circuit breaker is inconsistent, the main circuit connectors of the A phase and the B phase are non-self-commutation main circuit connectors, the main circuit connector of the C phase is a main circuit body commutation connector, and the wiring terminals of the main circuit connector of the B phase are staggered relative to the wiring terminals of the main circuit connectors of the A phase and the C phase and are located on the inner side; or, the main circuit connector of the A phase is a non-body commutating main circuit connector, the main circuit connectors of the B phase and the C phase are main circuit body commutating connectors, and the wiring terminal of the main circuit connector of the B phase is staggered and positioned at the outer side relative to the wiring terminal of the main circuit connectors of the A phase and the C phase, so that the connecting structure process of connecting the conducting bars in an L shape can be realized.

Further limiting, the main circuit connectors on the incoming line side can be connected with the corresponding phase of the circuit breaker in a one-to-one correspondence mode through the connecting conductive bars which are arranged in a layered mode from top to bottom, and the connecting conductive bars on the incoming line side are L-shaped.

Further limited, the circuit breaker is installed through the fixed bolster, and the fixed bolster is L shape, and the tip of this fixed bolster's vertical end plate is installed on the frame bottom plate of unit frame, and the tip of the horizontal end plate of fixed bolster is installed on frame rear end plate, and the circuit breaker is installed on the vertical end plate of fixed bolster.

The front part of the unit frame is provided with a handle for pulling the unit assembly by hand and/or the front part of the unit frame is provided with a lever boosting upper propelling mechanism for operating the unit assembly by a lever boosting mode.

Further limiting, the front part of the unit frame is provided with a position locking hole which is a threaded hole or a through hole, the left side and the right side of the bottom of the unit frame are provided with sliding parts of a guide rail device, and the bottom of the unit frame is also provided with an upper hook plate; and an additional mounting plate is arranged at the top of the rear end plate of the frame of the unit frame, and an auxiliary circuit connector is arranged on the additional mounting plate.

When the front part of a unit frame is provided with a lever boosting upper propelling mechanism, a lever boosting lower propelling mechanism is arranged on a unit chamber layer plate of the unit chamber.

It is further defined that the front part of the unit frame and the unit chamber layer plate of the unit chamber are provided with matched position locking holes, when the unit assembly enters the connecting position, the unit assembly is locked by a locking bolt which simultaneously passes through the position locking holes on the unit frame and the unit chamber, and the position locking holes on the unit frame or the unit chamber are threaded holes which are in threaded fit with the locking bolts.

Further inject, the left and right sides of unit assembly respectively has a guide rail device for move in the unit room to the unit assembly and lead, guide rail device sets up the slider around at least two of spout and embedding spout, slider and spout are located the bottom of unit frame and the unit room plywood of unit room respectively, have hook plate and lower hook plate on the bottom of unit frame and the unit room plywood of mutual upper and lower butt hook complex, at the in-process that the unit assembly got into the hookup location, hook plate and lower hook plate are in the combination state of upper and lower butt hook.

Further, the sliding groove is provided by a guide rail, the sliding part is provided by a sliding column, and the upper plane of the guide rail is provided with a convex rib for reducing the friction resistance of the unit assembly moving in the unit chamber.

And further limiting, the two ends of the sliding groove are closed and are used for being matched with the sliding piece to limit the moving stroke of the unit assembly, and when the unit assembly moves to the front end point of the moving stroke, the upper hook plate and the lower hook plate are in a mutually separated state.

The beneficial effects of the utility model are that: compared with the traditional main circuit connection structure, the main circuit connector body reversing connection breaker technology is applied to the incoming line side, the terminals of the A, B, C three-phase main circuit connector can be positioned and arranged on the outer side of the incoming line end of the breaker, the connection conducting bar can realize an L-shaped structure by 100%, the manufacturing process is simplified, the assembly time is reduced, the labor can be saved by 65%, and meanwhile, the temperature rise is lower after the length of the connection conducting bar is shortened. One unit with 6 connecting pieces saves 53.5 percent of copper, and 1 unit saves 6.5 to 8kg of copper on average.

A structure arrangement technology for lengthening a wiring terminal of a B-phase main circuit connector applied to the outgoing line side aims to sleeve a mutual inductor on the wiring terminal, a connecting hole of the wiring terminal is positioned in front of the mutual inductor, a connecting point for connecting a conductive bar and the wiring terminal is positioned at the front end of the mutual inductor, a reducing interval of 32mm is reserved for the outgoing line side again, a circuit breaker can be further close to a rear end plate of a rack for installing the main circuit connector, and the connecting conductive bar on the outgoing line side has the same L-shaped structure. The creativity of the connection structure is the maximum in order to reduce the unit depth to 300mm, and the structure is also the extremely satisfactory manufacturing and installation process structure of an industrial manufacturing factory.

The utility model discloses a two points of innovation structures of inlet wire side main circuit connector body switching-over connection circuit breaker and side B looks main circuit connector extension suit mutual-inductor of being qualified for the next round of competitions are arranged, compare traditional main circuit connection structure, 630A, 400A circuit breaker connection distance H can shorten to 88 mm's limit, 250A and following connection distance that is less than 88mm has realized that the cell room of cell degree of depth 300mm arranges the application of mutual-inductor, and the cabinet body degree of depth reduces 200 mm's integrated configuration technical goal.

250A, 125A circuit breaker connect main circuit connector only need 78mm can, unit chamber degree of depth 275mm can realize, if an equipment unit is whole 250A, 125A circuit breaker, the cabinet is dark only need 600mm, to the little environment in equipment fixing space, the place space expense that significantly reduces.

The guide rail device with the sliding groove is accurately positioned, and the displacement of the unit assembly can be accurately controlled within 0.5mm by 100 percent. Meanwhile, the upper hook plate and the lower hook plate are not extruded, and the unit assembly is free from jamming in operation.

Drawings

The present invention will be further explained with reference to the drawings and examples;

fig. 1 is a schematic structural view of a removable plug unit assembly according to embodiment 1 of the present invention;

fig. 2 is a schematic structural view of another view angle of the removable plug unit assembly according to embodiment 1 of the present invention;

fig. 3 is a schematic structural view of the removable plug unit assembly according to embodiment 1 of the present invention in a top view;

fig. 4 is a schematic view of an installation structure of a main circuit connector according to embodiment 1 of the present invention;

fig. 5 is a schematic view of an installation structure of a fixed bracket and a transformer of a circuit breaker according to embodiment 1 of the present invention;

fig. 6 is a schematic structural view of a unit assembly of embodiment 1 of the present invention, in which the L-shaped side plate and the pulling plate of the unit frame are omitted;

FIG. 7 is a schematic view of the structure of FIG. 6 from another perspective;

fig. 8 is a schematic structural view of a unit cell according to embodiment 1 of the present invention;

fig. 9 is a schematic structural view of another perspective of the unit cell according to embodiment 1 of the present invention;

fig. 10 is a schematic structural view of a removable plug unit according to embodiment 1 of the present invention;

fig. 11 is a schematic structural view of a removable plug unit assembly according to embodiment 2 of the present invention;

fig. 12 is a schematic structural view of a unit cell according to embodiment 2 of the present invention;

fig. 13 is a schematic view of an installation structure of a main circuit connector according to embodiment 3 of the present invention;

fig. 14 is a schematic top view of a removable plug unit assembly according to embodiment 3 of the present invention;

fig. 15 is a schematic structural view of a low-voltage plant to which the removable plug unit of the present invention is applied;

FIG. 16 is a schematic structural view of a prior art drawer unit assembly;

FIG. 17 is a front view of a prior art fixed plug-in unit;

FIG. 18 is a schematic diagram of a prior art back side configuration of a fixed plug-in unit;

in the figure, 1, a unit frame, 1-1, an L-shaped rear plate, 1-1-1, a frame rear end plate, 1-2, an L-shaped side plate, 1-3, a pulling plate, 1-4, an additional mounting plate, 2, a main circuit connector, 2-1, a main circuit body reversing connector, 2-2, a wiring bar, 3, a circuit breaker, 4, a mutual inductor, 5, a connecting conductive bar, 6, a carrying pole bar, 7, a supporting screw, 8, a mutual inductor mounting bracket, 9, a bus, 10, a fixing bracket, 11-1, a lever force-increasing upper pushing mechanism, 11-2, a lever force-increasing lower pushing mechanism 12, a handle, 13, a position locking hole, 14, a sliding piece, 15, a guide rail, 15-1, a sliding groove, 15-2, a convex rib, 16-1, an upper hook plate, 16-2, a lower hook plate, 17, an outlet static socket, 18, an auxiliary circuit connector, 19-1, a unit chamber layer plate, 19-2, a unit chamber back plate, 19-3, a unit door, 20, a locking bolt and 21, a protective isolation plate.

Detailed Description

Example 1, as shown in fig. 1 to 10, a main circuit connection structure, specifically a main circuit connection structure of a low-voltage complete equipment, includes a main circuit connector 2, a circuit breaker 3 and a transformer 4, three phases of the circuit breaker 3 are specifically a phase a, a phase B and a phase C from top to bottom, the circuit breaker 3 is connected to the main circuit connector 2 of each phase of an incoming line side and an outgoing line side through a connecting conductive bar 5 for carrying out an incoming line and an outgoing line of a main circuit in a main circuit plugging manner by the main circuit connector 2, the transformer 4 is fitted over the connecting conductive bar 5 of the outgoing line side, inter-phase centers of terminals of the main circuit connector 2 of each phase of the incoming line side and the outgoing line side are disposed corresponding to and coincident with inter-phase centers of a corresponding phase of the circuit breaker 3, and the connecting conductive bars 5 of the incoming line side and the outgoing line side are L-shaped, and a terminal of the main circuit connector 2 of each phase of the incoming line side and the outgoing line side is disposed at a middle position, and a terminal of the main circuit connector 2 of the phase B is disposed at a vertical position a, The terminals of the C two-phase main circuit connector 2 are staggered and arranged in a delta shape at the inner side, the L-shaped connecting conducting bar 5 comprises a horizontal section for connecting the circuit breaker 3 and a vertical section for connecting the terminals of the main circuit connector 2, the B-phase mutual inductor 4 at the outgoing line side is sleeved on the terminal of the corresponding main circuit connector 2, the terminal is specifically a wiring bar 2-2, the connection point of the terminal of the B-phase main circuit connector 2 at the outgoing line side and the connecting point of the connecting conducting bar 5 are positioned in front of the B-phase mutual inductor 4, and the A, C two-phase mutual inductors 4 at the upper and lower positions of the outgoing line side are sleeved on the horizontal section of the corresponding connecting conducting bar 5 and are positioned at the outer side of the B-phase connecting conducting bar 5.

A movable plug-pull unit assembly comprises a unit frame 1 and the main circuit connecting structure, wherein a main circuit connector 2 and a circuit breaker 3 are installed on the unit frame 1.

As shown in fig. 1 and 3, the A, C two-phase transformers 4 at the upper and lower positions on the outgoing line side are sleeved on the horizontal sections of the connecting conductive bars 5 of the corresponding phases by using a conventional installation method. The method specifically comprises the following steps: a shoulder pole strip 6 is inserted into a central induction hole of the mutual inductor 4, supporting screws 7 are installed at two ends of the shoulder pole strip 6, the supporting screws 7 are supported on the connecting conductive bar 5, and the mutual inductor 4 is sleeved on the connecting conductive bar 5 through the expanding supporting force of the shoulder pole strip 6 and the supporting screws 7.

As shown in fig. 5, the B-phase transformer 4 on the outgoing line side is mounted on a transformer mounting bracket 8, and the transformer mounting bracket 8 is mounted on the rack rear end plate 1-1-1 of the unit rack 1. The mutual inductor mounting support 8 is specifically an L-shaped support, a vertical end plate of the L-shaped support is mounted on the rear end plate 1-1-1 of the rack, and a horizontal end plate of the L-shaped support is a mounting base of the mutual inductor 4.

The main circuit connectors 2 of the A phase, the B phase and the C phase on the wire inlet side are arranged in a layered mode from top to bottom, the phase distance of the plugging ends of the main circuit connectors 2 of all the phases in the horizontal direction is consistent with the phase distance of the bus 9 and is used for being connected with the bus 9 in a plugging mode, the main circuit connectors 2 of the A phase are the traditional main circuit connectors 2 which are not commutated in a non-body mode, the plugging ends and the wiring ends of the traditional main circuit connectors 2 which are commutated in the non-body mode are on the same line, the main circuit connectors 2 of the B phase and the C phase are main circuit body commutation connectors 2-1, and the wiring ends of the main circuit connectors 2 of the B phase are staggered relative to the wiring ends of the main circuit connectors 2 of the A phase and the C phase and are located on the outer side. The main circuit connector 2 of the A phase, the B phase and the C phase at the outgoing line side can realize a main circuit connection structure in which the interphase center of the terminal of the main circuit connector 2 is correspondingly and consistently connected with the interphase center of the corresponding phase of the circuit breaker 3 only by adopting the traditional non-body-commutated main circuit connector 2.

The circuit breaker 3 is installed through a fixing support 10, the fixing support 10 is in an L shape, the end of a vertical end plate of the fixing support 10 is installed on a rack bottom plate of the unit rack 1, the end of a horizontal end plate of the fixing support 10 is installed on a rack rear end plate 1-1-1, and the circuit breaker 3 is installed on the vertical end plate of the fixing support 10.

The unit frame 1 of the removable plug unit assembly of this embodiment 1 has a handle 12 at the front for pulling the unit assembly by hand. The front part of the unit frame 1 is provided with a position locking hole 13, the position locking hole 13 is a threaded hole or a through hole, the left side and the right side of the bottom of the unit frame 1 are provided with sliding parts 14 of a guide rail device, and the bottom of the unit frame 1 is also provided with an upper hook plate 16-1; the top of the frame rear end plate 1-1-1 of the unit frame 1 is provided with an additional mounting plate 1-4, and an auxiliary circuit connector 18 is arranged on the additional mounting plate 1-4.

The movable plug-pull unit of the low-voltage complete equipment comprises a unit chamber and a unit assembly in the unit chamber, wherein the unit assembly is the movable plug-pull unit assembly. The unit cell layer 19-1 is also provided with a matching position locking hole 13, when the unit cell is brought into the connection position, the unit cell is locked by a locking bolt 20 passing through the unit frame 1 and the position locking hole 13 on the unit cell, and in the drawing of this embodiment 1, the position locking hole 13 on the unit cell is shown as a threaded hole screwed with the locking bolt 20, and the threaded hole is provided by a nut fixed on the unit cell layer 19-1.

The left side and the right side of the unit assembly are respectively provided with a guide rail device for guiding the unit assembly to move in the unit chamber, each guide rail device comprises a sliding groove 15-1 and at least two sliding parts 14 which are embedded into the sliding groove 15-1 and are arranged in front of and behind the sliding groove, the sliding parts 14 and the sliding grooves 15-1 are respectively positioned at the bottom of the unit rack 1 and on a unit chamber layer plate 19-1 of the unit chamber, an upper hook plate 16-1 and a lower hook plate 16-2 which are mutually matched with each other in an up-and-down hook-facing mode are arranged on the bottom of the unit rack 1 and the unit chamber layer plate 19-1, and in the process that the unit assembly enters a connecting position, the upper hook plate 16-1 and the lower hook plate 16-2 are in a combined state of up-and-down hook-facing.

The sliding groove 15-1 is provided by a guide rail 15, the sliding part 14 is a sliding column, the guide rail 15 is arranged on a unit chamber layer plate 19-1, the sliding part 14 is arranged at the bottom of the unit frame 1, the guide rail 15 is provided with a convex upper plane, the sliding groove 15-1 is arranged on the upper plane of the guide rail 15, a convex rib 15-2 extending along the moving direction of the unit assembly is further arranged on the upper plane and used for reducing the friction resistance of the unit assembly moving in the unit chamber, and the guide rail 15 supports the unit assembly moving through the convex rib 15-2. The sliding groove 15-1 is closed at both ends and is used for cooperating with the sliding part 14 to limit the moving stroke of the unit assembly, and when the unit assembly moves to the front end point of the moving stroke, the upper hook plate 16-1 and the lower hook plate 16-2 are in a mutually separated state. The bottom of the unit assembly has three upper hook plates 16-1, two of which 16-1 are located at the rear of the unit assembly and are arranged in a left-right row, and the other 16-1 is located at the front middle or near middle of the unit assembly.

The incoming line side realizes a main circuit connection structure that the interphase centers of the wiring ends of the main circuit connector 2 and the corresponding interphase centers of the circuit breakers 3 are correspondingly and consistently connected by adopting the main circuit body reversing connector 2-1, and the purpose of shortening the distance between the rear end plate 1-1-1 of the rack of the unit assembly and the rear end face of the circuit breaker 3, namely the circuit breaker connection distance H, is realized.

In the prior art, the installation mode of the outgoing line side transformer 4 of the B phase is the same as that of the A phase and the C phase transformers 4, a certain installation depth is required to be specially used for installation by adopting the carrying pole 6 and the supporting screw 7, the length of the wiring bar 2-2 of the outgoing line side main circuit connector 2 of the B phase is the same as that of the wiring bar 2-2 of the other phase main circuit connectors 2, the B phase transformer 4 can only be installed in front of the connection point of the wiring terminal of the B phase main circuit connector 2 and the connecting conductive bar 5, and a certain installation depth is required to be further specially used. In the embodiment 1, the mounting structure of the B-phase transformer 4 is innovated, and the length of the wiring bar 2-2 of the B-phase main circuit connector 2 is increased, so that the connection distance H of the circuit breaker can be further shortened.

The removable plug-in unit of embodiment 1 can reduce the distance between the rear end plate 1-1-1 of the rack of the unit assembly and the rear end surface of the circuit breaker 3 to 85mm, the copper consumption of the connecting conductive bar 5 of the drawer unit of 630A is only 2.19kg, the copper consumption of 400A is only 1.63kg, the copper consumption of 250A is only 0.83kg, the copper consumption of 125A is only 0.49kg, the unit depth can be reduced by 100mm, and the copper consumption is reduced by 53.5% compared with the copper consumption of the connecting conductive bar 5 of the main circuit of the traditional fixed plug-in structure.

The unit frame 1 comprises an L-shaped back plate 1-1, a left L-shaped side plate 1-2, a right L-shaped side plate 1-2 and a pulling plate 1-3, the L-shaped side plates 1-2 are fixed on the left side and the right side of the L-shaped back plate 1-1, the vertical plate part of the L-shaped back plate 1-1 is the frame back end plate 1-1 of the unit frame 1, the horizontal plate part of the L-shaped back plate 1-1 is a part of the frame bottom plate of the unit frame 1, the pulling plate 1-3 and the horizontal plate part of the L-shaped back plate 1-1 are respectively the front part and the rear part of the frame bottom plate, the end part of the vertical end plate of the fixed support 10 is arranged on the horizontal plate part of the L-shaped back plate 1-1, the pulling plate 1-3 is fixed between the front parts of the L-shaped side plates 1-2, two sliding parts 14 are arranged at the bottom of the L-shaped side plates 1-2, two pulling handles 12 are respectively positioned on the left side and the right side of the pulling plate 1-3, the handle 12 is a flat handle, the handle 12 is integrally in a strip shape, and a hand pulling groove convenient for hand pulling is formed in the upper portion of the handle 12. Two upper hook plates 16-1 are arranged at the bottom of the horizontal part of the L-shaped back plate 1-1, and one upper hook plate 16-1 is arranged at the bottom of the pulling plate 1-3. Two position locking holes 13 are arranged on the pulling plate 1-3 and are positioned at the rear of the handle 12.

Fig. 15 is a schematic structural view of a low-voltage plant to which the removable plug unit of embodiment 1 is applied.

The operation protection level of the removable plug unit of this embodiment 1: the incoming line side of the circuit breaker 3 is provided with a protective isolation plate 21, so that the safety of human body isolation operation is effectively realized, the protection grade is IP30 in the door opening state, and the standard only needs to reach IP 20.

The working process of the embodiment 1 is as follows:

insertion unit assembly operation: the unit assembly enters the unit chamber, the sliding part 14 is embedded into a sliding groove 15-1 of a guide rail 15 at two sides of the unit chamber, two hands push the movable plug-pull unit assembly into a connecting position through a handle 12 force, a main circuit connector 2 at the wire inlet side is in plug connection with a bus 9, a main circuit connector 2 at the wire outlet side is in plug connection with a wire outlet static socket 17 on a unit chamber back plate 19-2, and two locking bolts 20 penetrate through position locking holes 13 of the unit frame 1 and a unit chamber layer plate 19-1 to position the unit assembly, so that the connecting operation is completed. And closing the unit door 19-3 on the unit chamber and closing the breaker 3.

Pulling out the unit assembly: the breaker 3 is opened, the unit door 19-3 is opened, and the two locking bolts 20 on the unit frame 1 are loosened to separate the locking bolts 20 from the position locking holes 13 on the unit chamber layer plate 19-1. The unit assembly is pulled out by two hands through the handle 12, the sliding part 14 at the front side contacts the front end closed opening of the sliding groove 15-1 to limit the front end point of the moving stroke of the unit assembly, the upper hook plate 16-1 and the lower hook plate 16-2 are in a mutually separated state, and the unit assembly can be taken out by lifting the unit assembly.

The upper hook plate 16-1 and the lower hook plate 16-2 have the following functions: after the sliding part 14 on the unit assembly is embedded into the sliding groove 15-1 of the unit chamber for effective left and right positioning, as long as the unit assembly moves backwards by 1.0mm, the upper hook plate 16-1 and the lower hook plate 16-2 start to be hooked and matched, the unit assembly is effectively positioned up and down, and the sliding part 14 and the sliding groove 15-1 are combined for effective left and right positioning of the unit assembly, so that the main circuit connector 2 is ensured to be correctly aligned and spliced within +/-0.5 mm in the operation process of inserting the unit assembly.

The advantages of this embodiment 1 are: the connecting distance H of the circuit breaker is shortened to the limit of 88mm, structural technical breakthrough that 53.5% of copper is saved by the conducting bar for circuit breaker connection is realized, the connecting distance H of the circuit breaker is shortened as much as possible, the length of the conducting bar can be reduced, the copper-saving effect is achieved, the short conducting bar is small in resistance, low in temperature rise, low in operation energy consumption and long in unit service life. For the electrical industry: the shorter the connecting piece is, the lower the temperature rise is, and the technical common knowledge in the industry is.

The connecting distance H of the breaker is shortened to 88mm, the unit depth can be reduced by 75mm, the steel plate is saved by 10%, the cabinet depth is reduced by 200mm, the steel consumption can be reduced by 20kg averagely by 1 low-voltage complete equipment, the copper consumption is reduced by 6.5kg, and the economic benefit is considerable. When the low-voltage complete equipment is applied to offshore platforms, subways and ships, the sitting space is reduced, and the capital construction cost is greatly reduced.

Compare traditional main circuit connector and just can correspond the alternate center of circuit breaker structure and connect through transition turnover, the utility model discloses a main circuit connection structure that the alternate center corresponds unanimous connection can reduce and make installation cost of labor, synthesizes and makes artifically, and 1 equipment can save 1.5 individual expenses at least.

The improvement at frame rear end plate is installed to the circuit breaker for the frame bottom plate of unit frame no longer is the installation basis of circuit breaker, can the large tracts of land fretwork, the utility model discloses a structure of unit frame can reduce and use material 10%, and the manufacturing of technology is simplified, and the labour cost can reduce 10% again.

The utility model discloses a functional unit all installs on work platform is the cell room plywood, saves labour, and working strength is low, has the maintenance function of not having a power failure. The application technical route of the structural type of the main circuit plug structure connecting circuit breaker is created for functional units for Chinese low-voltage complete equipment, and the structural technology is not available in foreign brand companies, so that the blank of the industry technology is filled, and the short plate which is not enough for the application technology is solved.

The utility model discloses a plug unit of formula of moving aside adopts lever reinforcement advancing mechanism to carry out the plug operation in heavy current is used, in the undercurrent is used, adopts hand power plug operation, can both accomplish the operation about 20S, and the operation is quick, and it is high to use the feasibility.

The utility model discloses a functional unit economizes on material, saves labour, with low costs, the performance is high, and compact structure, cabinet type are little, equipment occupy the site space little, and manufacturing cost is 60% of foreign brand, and is 10% lower than the domestic brand, must produce very big economic benefits to the complete industry during trade application, is the highest technique of present domestic and foreign low pressure complete sets functional unit main circuit connection structure technical feasibility. The performance detection indexes of the Xinyuan accessory are as follows: the main circuit plug 630A has a short withstand current of 50KA/1S or 400A has a short withstand current of 40 KA/1S. The industry specification is that the overload delayed impact current 630A is 4536A/30S, 400A is 2880A/30S, and 250A is 1800A/30S. The temperature rise 630A is measured to be 32-36 ℃, the temperature rise 400A is measured to be 40-44 ℃, the temperature rise 250A is measured to be 39-44 ℃, and the temperature rise between phases is balanced within 5 ℃. The two detection indexes are specified in the industry as the highest indexes of the industry and are detected and verified by Suzhou electric academy of sciences. The structure technology of the scheme meets the application of 2500A current of heavy current equipment, completely meets the requirement of 5G equipment, and covers the standard requirement of application technology of equipment application equipment in all industries.

Example 2, as shown in fig. 11 and 12, is substantially the same as example 1 except that: the removable plug unit of the low-pressure complete equipment of the embodiment 2 does not have a handle 12 for pulling the operating unit assembly by hand, and the front part of the unit frame 1 is provided with a lever boosting upper propelling mechanism 11-1 for operating the unit assembly by a lever boosting mode. The pull handle 12 is not typically provided, but in applications a pull handle 12 may be provided on the left side of the lever power-on propulsion mechanism 11-1. The unit cell floor 19-1 of the unit cell is provided with a lever force-increasing lower pushing mechanism 11-2. A lever force-increasing propulsion mechanism consisting of a lever force-increasing upper propulsion mechanism 11-1 and a lever force-increasing lower propulsion mechanism 11-2.

The working process of the embodiment 2 is as follows:

insertion unit assembly operation: the unit assembly enters the unit chamber, the sliding part 14 is embedded into a sliding groove 15-1 of a guide rail 15 at two sides of the unit chamber, a lever operation tool is inserted into an operation opening of the lever boosting propulsion mechanism and is inserted to the bottom, the movable type plugging unit assembly is pushed into a connecting position by an upper lever operation tool, a main circuit connector 2 at the wire inlet side is connected with a bus 9 in a plugging manner, the main circuit connector 2 at the wire outlet side is connected with a wire outlet static socket 17 on a unit chamber back plate 19-2 in a plugging manner, and two locking bolts 20 penetrate through position locking holes 13 of a unit rack 1 and a unit chamber layer plate 19-1 to position the unit assembly, so that the connecting operation is completed. And closing the unit door 19-3 on the unit chamber and closing the breaker 3.

And exiting unit assembly operation: the breaker 3 is opened, the unit door 19-3 is opened, two locking bolts 20 on the unit frame 1 are loosened firstly, and the locking bolts 20 are separated from the position locking holes 13 on the unit chamber layer plate 19-1. The lever operating tool is inserted into an operating opening of the lever boosting propulsion mechanism and is inserted to the bottom, the lever operating tool is pulled down to withdraw the removable plug-in unit assembly, the sliding piece 14 on the front side contacts a front end closing opening of the sliding groove 15-1 to limit a front end point of a moving stroke of the unit assembly, the upper hook plate 16-1 and the lower hook plate 16-2 are in a mutually separated state, and the unit assembly can be taken out by lifting up the unit assembly.

Example 3, as shown in fig. 13 and 14, is substantially the same as example 1 except that: the main circuit connectors 2 of the phases a and B on the incoming line side of the unit assembly of the low voltage plant of this embodiment 3 are conventional non-body commutating main circuit connectors 2, only the main circuit connector 2 of the phase C is the main circuit body commutating connector 2-1, and the terminals of the main circuit connector 2 of the phase B are also staggered with respect to the terminals of the main circuit connectors 2 of the phases a and C but located inside.

Example 4, compared to example 1, is essentially the same, except that: in embodiments 1, 2, and 3, the plugging end of the main circuit connector 2 on the incoming line side is a plug, and is directly plugged with the bus 9, while the plugging end of the main circuit connector 2 on the incoming line side in embodiment 4 is a plugging row, a bidirectional connector is arranged on the unit room backplane 19-2, the bidirectional connector is the main circuit connector 2 that is plugged with a spring plug in a bidirectional manner, the bidirectional connector is plugged with the bus 9 from the front end of the spring plug, and the plugging row of the main circuit connector 2 on the incoming line side is plugged into the rear end of the bidirectional connector and is plugged with the rear end of the spring plug of the bidirectional connector. The main circuit connector 2 on the outgoing side is unchanged, providing more choices for the user.

The main circuit connector 2 on the incoming line side of the present embodiment 4 is disclosed in chinese patent document CN202121053837.4, a main circuit connection structure, and a functional unit, in which a bidirectional connector is inserted into a bus bar to connect the bidirectional connector to the bus bar.

Example 5, this example 5 is substantially the same as example 1 except that: the unit assembly and the functional unit of this embodiment 5 are specifically a drawer unit assembly and a drawer unit, and the main circuit connection structure and the transformer 4 mounting structure of embodiments 1, 2, 3, or 4 are applied to the drawer unit assembly and the drawer unit, and specifically include: in the drawer unit assembly, the circuit breaker 3 is connected with the main circuit connectors 2 of each phase of the incoming line side and the outgoing line side through the L-shaped connecting conductive bar 5, the interphase centers of the terminals of the main circuit connectors 2 of each phase of the incoming line side and the outgoing line side are correspondingly and consistently arranged with the interphase centers of the corresponding phases of the circuit breaker 3, the terminal of the B-phase main circuit connector 2 of each phase of the outgoing line side is in a middle position, the terminal of the B-phase main circuit connector 2 is staggered with the terminal of the A, C two-phase main circuit connector 2 in the vertical direction and is arranged in a delta shape at the inner side, the B-phase mutual inductor 3 of the outgoing line side is sleeved on the terminal of the corresponding phase main circuit connector 2, the connection point of the terminal of the B-phase main circuit connector 2 of the outgoing line side and the connecting conductive bar 5 is positioned in front of the B-phase mutual inductor 4, the A, C two-phase mutual inductor 4 of the outgoing line side is sleeved on the horizontal section of the corresponding phase connecting conductive bar 5 and is positioned on the B-phase connecting conductive bar 4 of the corresponding phase Outside of the electrical bank 5.

In the present invention, the phase center of the wiring end of the main circuit connector 2 at the incoming line side and the phase center of the corresponding phase of the circuit breaker 3 are correspondingly and consistently arranged, so that the main circuit connector at the incoming line side and the corresponding phase of the circuit breaker can be connected by the connecting conducting bars arranged in layers from top to bottom, and the connecting conducting bars arranged in layers from top to bottom are preferably L-shaped connecting conducting bars 5, which can better shorten the connection distance H of the circuit breaker, for example, in the above embodiments 1 to 5, the connecting conducting bars 5 at the incoming line side are all L-shaped, the removable plug units of embodiments 1, 2 and 4, the drawer units of embodiment 5 are generally 400A and 630A units, the removable plug units of embodiment 3 are generally 250A and 125A units, but because the circuit breaker model specification in the industry is various, the main circuit body reversing connector 2-1 sometimes only uses the C phase, sometimes, both the phase B and the phase C are used, which does not exclude that the connection conductor bar 5 on the incoming line side needs to be bent and is not L-shaped, but the inter-phase centers of the terminals of the main circuit connector 2 on the incoming line side are correspondingly arranged to be consistent with the inter-phase centers of the corresponding phases of the circuit breaker 3.

Claims (14)

1. The utility model provides a main circuit connection structure, specifically is low pressure complete sets's main circuit connection structure, includes main circuit connector, circuit breaker and mutual-inductor, and the three-phase of circuit breaker specifically is A looks, B looks and C looks from top to bottom, and the circuit breaker is connected characterized by through the main circuit connector who connects each looks of leading electrical drainage and incoming line side and outgoing line side: the line inlet side and the line outlet side are correspondingly and consistently arranged between the interphase centers of the terminals of the main circuit connectors of each phase and the interphase centers of the corresponding phases of the circuit breaker, the connecting conductive bar at the line outlet side is L-shaped, the terminal of the B-phase main circuit connector of each phase at the line outlet side is in a middle position and is staggered with the terminal of the A, C-phase main circuit connector at the upper and lower positions in the vertical direction and is arranged in a triangular shape at the inner side, the L-shaped connecting conductive bar comprises a horizontal section for connecting the circuit breaker and a vertical section for connecting the terminal of the main circuit connector, the B-phase mutual inductor at the line outlet side is sleeved on the terminal of the main circuit connector of the corresponding phase, the connection point of the terminal of the B-phase main circuit connector at the line outlet side and the connecting conductive bar is positioned in front of the B-phase mutual inductor, and the A, C-phase mutual inductor at the line outlet side is sleeved on the horizontal section of the connecting conductive bar of the corresponding phase and is positioned on the outer side of the connecting conductive bar of the B-phase And (3) side.

2. The main circuit connection structure according to claim 1, wherein: and the B-phase mutual inductor on the outgoing line side is installed through a mutual inductor installation support on the unit rack.

3. The main circuit connection structure according to claim 2, wherein: the mutual inductor mounting bracket is an L-shaped bracket, a vertical end plate of the L-shaped bracket is mounted on a rear end plate of the rack, and a horizontal end plate of the L-shaped bracket is a mounting base of the mutual inductor.

4. The main circuit connection structure according to claim 1, wherein: the wiring terminals of the main circuit connectors of each phase on the incoming line side are distributed in a delta shape in which the wiring terminals of the B-phase main circuit connectors in the middle position are staggered with the wiring terminals of the A, C-two-phase main circuit connectors in the upper and lower positions in the vertical direction.

5. The main circuit connection structure according to claim 4, wherein: the main circuit connectors of the A phase, the B phase and the C phase on the wire inlet side are arranged in a layered mode from top to bottom, the phase distance of the plugging ends of the main circuit connectors of each phase in the horizontal direction is consistent with the phase distance of the bus, and the main circuit connectors of the A phase and the B phase are used for being connected with the bus in a plugging mode, wherein the main circuit connectors of the A phase and the B phase are non-body-commutating main circuit connectors, the main circuit connector of the C phase is a main circuit body commutating connector, and the wiring terminals of the main circuit connector of the B phase are staggered relative to the wiring terminals of the main circuit connectors of the A phase and the C phase and are located on the inner side; or the main circuit connector of the phase A is a non-body commutating main circuit connector, the main circuit connectors of the phase B and the phase C are main circuit body commutating connectors, and the terminal of the main circuit connector of the phase B is staggered and positioned at the outer side relative to the terminal of the main circuit connectors of the phase A and the phase C.

6. The main circuit connection structure according to claim 1, wherein: the main circuit connector on the incoming line side is connected with the corresponding phase of the circuit breaker in a one-to-one correspondence mode through the connecting conductive bars which are arranged in a layered mode from top to bottom, and the connecting conductive bars on the incoming line side are L-shaped.

7. The main circuit connection structure according to claim 1, wherein: the circuit breaker install through the fixed bolster, the fixed bolster is L shape, the tip of the vertical end plate of this fixed bolster is installed on the frame bottom plate of unit frame, the tip of the horizontal end plate of fixed bolster is installed on frame rear end plate, the circuit breaker is installed on the vertical end plate of fixed bolster.

8. The utility model provides a removal type plug unit assembly, specifically is low pressure complete sets's removal type plug unit assembly, characterized by: the main circuit connecting structure comprises a unit frame and a main circuit connecting structure as claimed in claim 1, wherein a handle is arranged at the front part of the unit frame and used for pulling and operating the unit assembly by hand, and/or a lever force-increasing upper propelling mechanism is arranged at the front part of the unit frame and used for operating the unit assembly in a lever force-increasing mode.

9. The removable plug unit assembly of claim 8, wherein: the front part of the unit frame is provided with a position locking hole which is a threaded hole or a through hole, the left side and the right side of the bottom of the unit frame are provided with sliding parts of a guide rail device, and the bottom of the unit frame is also provided with an upper hook plate;

and an additional mounting plate is arranged at the top of the rear end plate of the frame of the unit frame, and an auxiliary circuit connector is arranged on the additional mounting plate.

10. The utility model provides a removal type plug unit, specifically is low pressure complete sets's removal type plug unit, includes the unit assembly in unit room and the unit room, characterized by: the unit assembly is the removable plug-in unit assembly according to claim 8, and when the lever boosting upper pushing mechanism is provided at the front part of the unit frame, the lever boosting lower pushing mechanism is provided on the unit chamber layer plate of the unit chamber.

11. The removable plug-in unit of claim 10, wherein: the front part of the unit frame and the unit chamber layer plate of the unit chamber are provided with matched position locking holes, when the unit assembly enters a connecting position, the unit assembly is locked by a locking bolt which simultaneously passes through the position locking holes on the unit frame and the unit chamber, and the position locking hole on the unit frame or the unit chamber is a threaded hole which is in threaded fit with the locking bolt.

12. The removable plug unit of claim 10, wherein: the left side and the right side of the unit assembly are respectively provided with a guide rail device for guiding the unit assembly to move in the unit chamber, the guide rail devices comprise sliding grooves and at least two front and back sliding parts embedded into the sliding grooves, the sliding parts and the sliding grooves are respectively positioned on the bottom of the unit rack and a unit chamber laminate of the unit chamber, an upper hook plate and a lower hook plate which are mutually matched with each other in a vertically opposite manner are arranged on the bottom of the unit rack and the unit chamber laminate, and the upper hook plate and the lower hook plate are in a vertically opposite hook combined state in the process that the unit assembly enters a connecting position.

13. The removable plug unit of claim 12, wherein: the sliding groove is provided by a guide rail, the sliding part is a sliding column, and the upper plane of the guide rail is provided with a convex rib for reducing the friction resistance of the unit assembly moving in the unit chamber.

14. The removable plug unit of claim 12, wherein: the two ends of the sliding groove are closed and are used for being matched with the sliding piece to limit the moving stroke of the unit assembly, and when the unit assembly moves to the front end point of the moving stroke, the upper hook plate and the lower hook plate are in a mutually separated state.

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