CN114843147B

CN114843147B - Interlocking mechanism for low-voltage double-plastic-shell circuit breaker

Info

Publication number: CN114843147B
Application number: CN202210765112.0A
Authority: CN
Inventors: 苏海超; 李斌; 冯天龙; 邱林烨; 秦筱; 王杰
Original assignee: Siebel Electric Co ltd
Current assignee: Siebel Electric Co ltd
Priority date: 2022-07-01
Filing date: 2022-07-01
Publication date: 2022-10-04
Anticipated expiration: 2042-07-01
Also published as: CN114843147A

Abstract

The invention relates to the technical field of electrical elements, in particular to an interlocking mechanism for a low-voltage double-plastic-shell circuit breaker, which comprises a plastic shell and a circuit breaker, wherein the interlocking mechanism and a positioning mechanism are respectively installed on the left side and the right side of an inner cavity of the plastic shell, positioning pins are respectively installed at the upper end and the lower end of the left side and the right side of the circuit breaker, the circuit breaker is inserted into the inner cavity of the positioning mechanism, the positioning pins are clamped with the positioning mechanism to position the circuit breaker, one end of a connecting rod is installed at the bottom end of the right side of the interlocking mechanism, and the other end of the connecting rod is connected with a brake lever of a circuit breaker opening and closing brake. The interlocking mechanism is convenient to disassemble and assemble the circuit breaker, reduces the replacement difficulty, does not need to move the circuit breaker up and down, avoids the safety problems of electric shock and the like caused by collision with surrounding electrical elements, is suitable for interlocking use of various disconnecting switches, has small use limitation, and greatly meets the requirements of power on and power off.

Description

Interlocking mechanism for low-voltage double-plastic-shell circuit breaker

Technical Field

The invention relates to the technical field of electrical elements, in particular to an interlocking mechanism for a low-voltage double-plastic-shell circuit breaker.

Background

The circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition within a prescribed time. The circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to the application range, the high-voltage and low-voltage boundary lines are relatively vague, and the circuit breakers above 3kV are generally called high-voltage electric appliances. The molded case circuit breaker not only can monitor electric energy, but also has a fire extinguishing function;

in order to install and operate, the circuit breaker is used as multiple electric energy monitoring elements such as current, voltage and the like, damage and replacement are common, the disassembly and installation modes of the currently used circuit breaker are mostly in a buckling mode, the circuit breaker is required to move up and down, the space in equipment for storing the circuit breaker is compact due to a power distribution cabinet and the like, the operation space is small, the disassembly and installation of the circuit breaker are time-consuming and labor-consuming, the circuit breaker is easy to touch surrounding electric elements due to too much force, in actual electric control, for the sake of safety, interlocking exists between the circuit breaker and an isolating switch, when the circuit breaker is located at a closing position, the isolating switch cannot be closed and closed, electric arcs are prevented from being generated by the isolating switch, however, the isolating switch is different in size according to the rated current of the isolating switch, the volume is also different, the existing interlocking mechanism can only be suitable for one type of the current, the practicability is poor, the interlocking between various isolating switches and the circuit breaker is difficult to meet, and aiming at the problems, a convenient-to-use mechanism for the molded case circuit breaker is urgently needed.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, and the technical problem to be solved by the invention is an interlocking mechanism for a low-voltage double-plastic-shell circuit breaker.

In order to achieve the purpose, the invention provides the following technical scheme: an interlocking mechanism for a low-voltage double-molded case circuit breaker comprises a molded case and a circuit breaker, wherein the interlocking mechanism and a positioning mechanism are respectively installed on the left side and the right side of an inner cavity of the molded case, positioning pins are installed at the upper end and the lower end of the left side and the right side of the circuit breaker, the circuit breaker is inserted into the inner cavity of the positioning mechanism, the positioning pins are clamped with the positioning mechanism to position the circuit breaker, one end of a connecting rod is installed at the bottom end of the right side of the interlocking mechanism, and the other end of the connecting rod is connected with a brake rod of a circuit breaker opening and closing device;

positioning mechanism is including installing the frame at the moulded case inner chamber, and the frame is the U-shaped, the preformed hole has been seted up at the right side wall middle part of frame, the inner chamber of frame is pegged graft and is had gliding movable plate from top to bottom, the equal joint in top left and right sides of movable plate has the one end of first spring, and the other end of first spring and the inner chamber top joint of frame, the locating plate is all installed at both ends about the inner wall of movable plate, and the locating plate cup joints and fixes a position the circuit breaker at the locating pin outer wall, the shifting block that runs through the preformed hole inner chamber is installed on the right side of movable plate.

Preferably, the positioning plate is U-shaped, and the depth of the inner cavity is greater than the diameter of the positioning pin.

Preferably, interlocking device is including installing the drive assembly who moulds the shell left side wall, the slide rail is installed along upper and lower direction to drive assembly's top rear side, and the slide rail top runs through the upper surface of moulding the shell, gliding sliding sleeve from top to bottom has been cup jointed to the outer wall of slide rail, the front side top spiro union of sliding sleeve has positioning bolt, and positioning bolt rear side and slide rail front side contact to the sliding sleeve location, the front side bottom of sliding sleeve is installed and is blockked the subassembly.

Preferably, the drive assembly is including installing the shell in the left of the shell inner chamber of moulding the shell, the inner chamber front side of shell has been pegged graft along upper and lower direction and has the carriage release lever, and the carriage release lever is the rectangle, there is the one end of pars contractilis at the inner chamber rear side middle part of shell through the round pin hub connection, and the other end of pars contractilis and the bottom of carriage release lever through the round pin hub connection, the one end of connecting rod is still rotatably installed to pars contractilis and the junction of carriage release lever, and the other end and the connecting rod left end installation of connecting rod, the rack is installed on the top of carriage release lever.

Preferably, block the subassembly including installing the removal case in sliding sleeve front side bottom, and the rack top runs through the upper surface of removal case, the carousel is installed through the supporting to the inner chamber of removal case, the location screw has all been seted up along circumference outward to the front side of carousel, the inner chamber spiro union of location screw has drive bolt, the rotatory gear of coaxial line is installed to the front side of carousel, and the gear is connected with the rack toothing, the apron is installed to the front side of removal case, stop collar is installed on the right side of removal case, the inner chamber of stop collar is pegged graft and is had the slide that can the horizontal slip, the spout has been seted up along the upper and lower direction to the front side left end of slide, the pin is all installed at both ends about the right side wall of slide.

Preferably, the length of the sliding groove is larger than the diameter of the circular track for the driving bolt to move under the action of the turntable.

Preferably, the telescopic part comprises a sleeve connected to the rear side of the inner cavity of the shell through a pin, the inner cavity of the sleeve is connected with the second spring in an inserting mode, the bottom end of the inner cavity of the sleeve is connected with one end of a push rod in an inserting mode, and the other end of the push rod is connected with the bottom end of the movable rod through a pin.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the circuit breaker disassembly tool, the shifting block is lifted upwards, the movable plate drives the positioning plate to move upwards to be separated from the positioning pin, so that the disassembly of the circuit breaker is realized, the movable plate pushes the positioning plate to move downwards under the action of the elastic force of the first spring, and the positioning plate is sleeved on the positioning pin to realize the positioning of the circuit breaker, so that the disassembly and the assembly of the circuit breaker are facilitated, the replacement difficulty is reduced, the circuit breaker does not need to be moved upwards or downwards, and the safety problems of electric shock and the like caused by collision with surrounding electrical elements are avoided;

2. screwing out the driving bolt from the sliding groove, enabling the rotary plate to rotate freely, screwing the positioning bolt to keep away from the sliding rail, enabling the sliding sleeve to slide up and down on the outer wall of the sliding rail, changing the height of the movable box, until the stop lever reaches a specified height, screwing the positioning bolt to contact with the sliding rail, screwing the driving bolt into the positioning screw hole capable of normally driving the sliding plate, completing height adjustment of the stop lever, and enabling the interlocking mechanism to be suitable for various disconnecting switches for interlocking use.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a front sectional view of the positioning mechanism of the present invention;

FIG. 3 is a left side view of the positioning plate of the present invention;

FIG. 4 is a schematic view of an interlock mechanism according to the present invention;

FIG. 5 is a right side cross-sectional view of an interlock mechanism of the present invention;

FIG. 6 is a front cross-sectional view of a barrier assembly of the present invention;

FIG. 7 is a right side sectional view of the telescoping section of the present invention.

In the figure: 1-plastic shell, 2-circuit breaker, 3-positioning mechanism, 4-interlocking mechanism, 5-positioning pin, 6-connecting rod, 31-frame, 32-preformed hole, 33-moving plate, 34-first spring, 35-positioning plate, 36-shifting block, 41-driving component, 42-sliding rail, 43-sliding sleeve, 44-positioning bolt, 45-blocking component, 411-shell, 412-moving rod, 413-telescopic part, 414-connecting rod, 415-rack, 451-moving box, 452-rotating disk, 453-positioning screw hole, 454-driving bolt, 455-gear, 456-cover plate, 457-limiting sleeve, 458-sliding plate, 459-sliding groove, 4510-blocking rod, 4131-sleeve, 4132-second spring and 4133-push rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a technical scheme that: an interlocking mechanism for a low-voltage double-molded case circuit breaker is shown in figures 1-7 and comprises a molded case 1 and a circuit breaker 2, wherein the interlocking mechanism 4 and a positioning mechanism 3 are respectively installed on the left side and the right side of an inner cavity of the molded case 1, positioning pins 5 are installed at the upper end and the lower end of the left side and the right side of the circuit breaker 2, the circuit breaker 2 is inserted into the inner cavity of the positioning mechanism 3, the positioning pins 5 are clamped with the positioning mechanism 3 to position the circuit breaker 2, one end of a connecting rod 6 is installed at the bottom end of the right side of the interlocking mechanism 4, and the other end of the connecting rod 6 is connected with a brake lever of the circuit breaker 2 for opening and closing;

positioning mechanism 3 is including installing the frame 31 at the inner chamber of moulded case 1, and frame 31 is the U-shaped, preformed hole 32 has been seted up at the right side wall middle part of frame 31, for shifting block 36 reciprocates and provides the space, the inner chamber of frame 31 is pegged graft and is had gliding movable plate 33 from top to bottom, the equal joint in top left and right sides of movable plate 33 has the one end of first spring 34, and the other end of first spring 34 and the inner chamber top joint of frame 31, first spring 34 is rotary spring, produce elastic deformation after receiving tensile or extrusion, resume to initial condition after getting rid of external force, can make movable plate 33 move down under its spring action, locating plate 35 is all installed at inner wall upper and lower both ends about movable plate 33, and locating plate 35 cup joints at 5 outer walls of locating pin and fixes a position circuit breaker 2, the right side of movable plate 33 is installed the shifting block 36 that runs through the preformed hole 32 inner chamber.

As preferred scheme, further, locating plate 35 is the U-shaped, and the inner chamber degree of depth is greater than 5 diameters of locating pin, ensures that locating plate 35 can wrap locating pin 5 completely, guarantees the stability between locating pin 5 and the locating plate 35 to realize circuit breaker 2 location.

As a preferred scheme, further, the interlocking mechanism 4 includes a driving assembly 41 installed on the left side wall of the plastic housing 1, a sliding rail 42 is installed on the rear side of the top end of the driving assembly 41 along the up-down direction, the top end of the sliding rail 42 penetrates through the upper surface of the plastic housing 1, the sliding rail 42 is i-shaped, the stability of the sliding sleeve 43 is improved, a sliding sleeve 43 capable of sliding up and down is sleeved on the outer wall of the sliding rail 42, a positioning bolt 44 is screwed on the top end of the front side of the sliding sleeve 43, the rear side of the positioning bolt 44 contacts with the front side of the sliding rail 42 to position the sliding sleeve 43, the contact surface between the positioning bolt 44 and the sliding rail 42 is a non-smooth surface, friction force is improved, the stability of the sliding sleeve 43 on the sliding rail 42 is further improved, and a blocking assembly 45 is installed at the bottom end of the front side of the sliding sleeve 43.

Preferably, the driving assembly 41 includes a housing 411 installed on the left side of the inner cavity of the plastic housing 1, a moving rod 412 is inserted into the front side of the inner cavity of the housing 411 in the up-down direction, the moving rod 412 is rectangular to prevent the moving rod 412 from rotating, the middle part of the rear side of the inner cavity of the housing 411 is connected with one end of a telescopic part 413 through a pin, the other end of the telescopic part 413 is connected with the bottom end of the moving rod 412 through a pin, the telescopic part 413 supports the moving rod 412 to move upwards, the joint of the telescopic part 413 and the moving rod 412 is rotatably provided with one end of a connecting rod 414, the other end of the connecting rod 414 is installed with the left end of the connecting rod 6, the top end of the moving rod 412 is provided with a rack 415, the rack 415 moves upwards or downwards to enable the gear 455 to rotate clockwise or anticlockwise.

Preferably, the blocking assembly 45 includes a moving box 451 installed at the bottom end of the front side of the sliding sleeve 43, the top end of the rack 415 penetrates through the upper surface of the moving box 451, a rotating disc 452 is installed in the inner cavity of the moving box 451 through a support, positioning screw holes 453 are all formed in the outer edge of the front side of the rotating disc 452 along the circumferential direction, after the rotating disc 452 rotates to a specified angle, the driving bolt 454 can be screwed into the corresponding positioning screw hole 453, so that the driving bolt 454 can still stir the sliding plate 458 to move normally left and right, the driving bolt 454 is screwed into the inner cavity of the positioning screw hole 453, a gear 455 rotating coaxially is installed at the front side of the rotating disc 452, the gear 455 is meshed with the rack 415, a cover plate 456 is installed at the front side of the moving box 451, a limit sleeve 457 is installed at the right side of the moving box 451, a sliding plate 458 capable of sliding left and right is inserted into the inner cavity of the limit sleeve 457, a sliding groove 459 is formed in the left and right direction at the left end of the sliding plate 458, blocking rods 4510 are installed at the upper and lower ends of the right side wall of the sliding plate 458, and the blocking rod 4510 is interlocked with the blocking rod.

Preferably, the length of the sliding slot 459 is greater than the diameter of the circular path of the driving bolt 454 driven by the rotating disc 452, so that the driving bolt 454 does not block the rotating disc 452 from rotating the driving bolt 454 when the driving bolt 454 slides up and down in the sliding slot 459.

Preferably, the telescopic part 413 includes a sleeve 4131 connected to the rear side of the inner cavity of the housing 411 by a pin, the sleeve 4131 and the push rod 4133 move linearly, a second spring 4132 is inserted into the inner cavity of the sleeve 4131, the second spring 4132 is a rotary spring, and is elastically deformed after being stretched or pressed, and returns to an initial state after an external force is removed. The push rod 4133 is pushed by the elastic force to move outwards, so that the movable rod 412 moves upwards or downwards and is positioned, one end of the push rod 4133 is inserted into the bottom end of the inner cavity of the sleeve 4131, and the other end of the push rod 4133 is connected with the bottom end of the movable rod 412 through a pin shaft.

The working principle is as follows:

step one, a plastic shell 1 is installed in equipment such as a power distribution cabinet which performs a storage function, an isolation switch is installed at a position located at the top of the plastic shell 1, when a circuit breaker 2 is switched on, a connecting rod 6 pulls a connecting rod 414 to move upwards, due to the fact that the swing track of a brake lever of the circuit breaker 2 is different from that of an expansion part 413, the expansion part 413 is connected with the circuit breaker 2 through the connecting rod 414, a push rod 4133 is enabled to swing upwards, the push rod 4133 moves towards a sleeve 4131 and extrudes a second spring 4132, a moving rod 412 moves upwards under the action of external force of the push rod 4133 until the circuit breaker 2 is switched on, the push rod 4133 abuts against the top of an inner cavity of a shell 411 under the action of elastic force of the second spring 4132, the moving rod 412 is positioned, in the process that the moving rod 412 moves upwards, a rack 415 also moves upwards, a rotary table 452 rotates 180 degrees clockwise through a gear 455, a driving bolt 454 on the rotary table 452 rotates along with the rotary table 452, the driving bolt 454, the sliding in a way of a sliding groove 459, the sliding plate 458 slides towards the right side, a blocking rod 4510 blocks the middle of the front side of the isolation switch, and prevents an arc from generating a switching on a switching operation, and a fire disaster caused by an arc;

step two, when the breaker 2 needs to be disassembled and assembled, the shifting block 36 is lifted up, the moving plate 33 is promoted to drive the positioning plate 35 to move upwards, the first spring 34 is extruded until the positioning plate 35 is separated from the positioning pin 5, the breaker 2 can be taken down, the downward elastic force is applied to the moving plate 33 through the elastic force of the first spring 34, the positioning plate 35 can be stably sleeved on the positioning pin 5, the positioning of the breaker 2 is realized, the disassembly and assembly of the breaker 2 can be realized only by lifting the shifting block 36, time and labor are saved, and the phenomenon that the breaker 2 is moved to touch surrounding elements is avoided;

step three, when the height of the blocking rod 4510 needs to be adjusted according to the volume of the disconnector, the cover plate 456 is opened, the driving bolt 454 is screwed down from the positioning screw hole 453, the screwing positioning bolt 44 is far away from the slide rail 42, the sliding sleeve 43 slides on the slide rail 42, the moving box 451 can be driven to move up and down through the sliding sleeve 43 until the blocking rod 4510 reaches the designated height, the screwing positioning bolt 44 locks the sliding sleeve 43, the moving box 451 stays at the current height, and then the driving bolt 454 is screwed into the required positioning screw hole 453 to ensure the normal left and right movement of the sliding plate 458 and achieve height adjustment of the blocking rod 4510, so that disconnectors with different volumes can be limited, and the disconnector with different in volume can be prevented from being operated by mistake when the disconnector 2 is switched on.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a two moulded case circuit breakers of low pressure are with interlocking device, includes moulded case (1) and circuit breaker (2), its characterized in that: the left side and the right side of an inner cavity of the plastic shell (1) are respectively provided with an interlocking mechanism (4) and a positioning mechanism (3), the upper end and the lower end of the left side and the lower end of the right side of the circuit breaker (2) are respectively provided with a positioning pin (5), the circuit breaker (2) is inserted into the inner cavity of the positioning mechanism (3), the positioning pins (5) are clamped with the positioning mechanism (3) to position the circuit breaker (2), the bottom end of the right side of the interlocking mechanism (4) is provided with one end of a connecting rod (6), and the other end of the connecting rod (6) is connected with a brake lever of the circuit breaker (2) for opening and closing;

the positioning mechanism (3) comprises a frame (31) arranged in an inner cavity of the plastic shell (1), the frame (31) is U-shaped, a preformed hole (32) is formed in the middle of the right side wall of the frame (31), a movable plate (33) capable of sliding up and down is inserted into the inner cavity of the frame (31), one end of a first spring (34) is clamped on the left side and the right side of the top end of the movable plate (33), the other end of the first spring (34) is clamped with the top end of the inner cavity of the frame (31), positioning plates (35) are arranged on the upper end and the lower end of the left inner wall and the right inner wall of the movable plate (33), the positioning plates (35) are sleeved on the outer wall of a positioning pin (5) to position the circuit breaker (2), and a shifting block (36) penetrating through the inner cavity of the preformed hole (32) is arranged on the right side of the movable plate (33);

the interlocking mechanism (4) comprises a driving assembly (41) arranged on the left side wall of the plastic shell (1), a sliding rail (42) is arranged on the rear side of the top end of the driving assembly (41) along the vertical direction, the top end of the sliding rail (42) penetrates through the upper surface of the plastic shell (1), a sliding sleeve (43) capable of sliding up and down is sleeved on the outer wall of the sliding rail (42), a positioning bolt (44) is screwed at the top end of the front side of the sliding sleeve (43), the rear side of the positioning bolt (44) is in contact with the front side of the sliding rail (42) to position the sliding sleeve (43), and a blocking assembly (45) is arranged at the bottom end of the front side of the sliding sleeve (43);

the driving assembly (41) comprises a shell (411) arranged on the left side of an inner cavity of the plastic shell (1), a moving rod (412) is inserted into the front side of the inner cavity of the shell (411) in the vertical direction, the moving rod (412) is rectangular, the middle of the rear side of the inner cavity of the shell (411) is connected with one end of a telescopic part (413) through a pin shaft, the other end of the telescopic part (413) is connected with the bottom end of the moving rod (412) through a pin shaft, one end of a connecting rod (414) is rotatably arranged at the joint of the telescopic part (413) and the moving rod (412), the other end of the connecting rod (414) is arranged at the left end of the connecting rod (6), and a rack (415) is arranged at the top end of the moving rod (412);

the blocking assembly (45) comprises a moving box (451) installed at the bottom end of the front side of a sliding sleeve (43), the top end of a rack (415) penetrates through the upper surface of the moving box (451), a rotating disc (452) is installed in an inner cavity of the moving box (451) through a support, a positioning screw hole (453) is formed in the outer edge of the front side of the rotating disc (452) along the circumferential direction, a driving bolt (454) is screwed in the inner cavity of the positioning screw hole (453), a gear (455) rotating coaxially is installed on the front side of the rotating disc (452), the gear (455) is meshed with the rack (415) and connected with the rotating disc, a cover plate (456) is installed on the front side of the moving box (451), a limiting sleeve (457) is installed on the right side of the moving box (451), a sliding plate (458) capable of sliding left and right is inserted into the inner cavity of the limiting sleeve (457), a sliding groove (459) is formed in the left and right end of the front side of the sliding plate (458), and blocking rods (4510) are installed at the upper end and the lower end of the right side wall of the sliding plate (458).

2. The interlocking mechanism for a low-voltage double molded case circuit breaker according to claim 1, wherein: the positioning plate (35) is U-shaped, and the depth of the inner cavity is greater than the diameter of the positioning pin (5).

3. The interlocking mechanism for the low-voltage double plastic-shell circuit breaker according to claim 2, characterized in that: the length of the sliding groove (459) is larger than the diameter of the circular track for the driving bolt (454) to move by the rotating disc (452).

4. The interlocking mechanism for a low-voltage double molded case circuit breaker according to claim 3, wherein: the telescopic part (413) comprises a sleeve (4131) connected to the rear side of an inner cavity of the shell (411) through a pin shaft, a second spring (4132) is inserted into the inner cavity of the sleeve (4131), one end of a push rod (4133) is inserted into the bottom end of the inner cavity of the sleeve (4131), and the other end of the push rod (4133) is connected with the bottom end of the moving rod (412) through a pin shaft.