Reclosing molded case circuit breaker

Abstract

The invention discloses a reclosing molded case circuit breaker, and relates to the technical field of circuit breakers, the reclosing molded case circuit breaker comprises a shell, the shell comprises a circuit breaker body and a switch gate, the bottom of the switch gate is provided with a wiring groove, the reclosing molded case circuit breaker further comprises a stirring assembly and an adjusting assembly which are arranged on the two sides of the circuit breaker body, and when the switch gate is closed, the adjusting assembly is started, and the switch gate is opened; the sleeve rod pulls an extension spring to extend through a connecting frame, meanwhile, an embedded rod rotates along with the sleeve rod to push a connecting rod, so that a sliding block connected with an extension rod descends in a sliding groove of a mounting frame, the sliding block drives two connecting columns and a clamping sleeve to move, the connecting columns descend along a limiting groove, and a wire is driven to be away from a conducting strip; when the circuit breaker is completely separated from the contact of the circuit breaker body and continuously descends, one connecting column is guided by the limiting groove to be gradually away from the other connecting column, clamping and fixing of the jacket to the wire are relieved, and the process provides convenience for follow-up maintenance, ensures that the wire is not in a dangerous state and avoids fire.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of circuit breakers, in particular to a reclosing molded case circuit breaker. BACKGROUND

[0002] A circuit breaker is an indispensable power distribution electrical appliance in a power grid, which has the ability to turn on, carry and break the current under normal circuit conditions. At the same time, under specified abnormal conditions (such as overloading, short circuit, under-voltage and single-phase grounding fault, etc.), the circuit breaker can also turn on, carry and break the current within a certain time, which is an important switch electrical appliance to ensure the safe and stable operation of the power grid.

[0003] The electric operating mechanism, as a special accessory of the molded case circuit breaker, is used in cooperation with the circuit breaker to realize the electric closing, opening and reclosing operation of the circuit breaker at a long distance. This function greatly facilitates the centralized control and automatic operation of the power transmission and distribution network, and improves the efficiency and safety of the power grid management.

[0004] However, there is a problem that cannot be ignored in the actual use process. With the long-time use of the circuit breaker and the electric operating mechanism, the mechanical parts will gradually wear out and age. Even if the electric operating mechanism can normally drive the current to break, the switch may not be in place due to factors such as mechanical jamming and part deformation during the switching process. In this case, the wire may not be completely disconnected from the contact of the circuit breaker, and always remains in a state of pseudo-disconnection. In this case, if fault maintenance is performed, it is extremely likely to cause a fire and other safety accidents, which seriously threatens the operation of the power grid and the safety of personnel. SUMMARY

[0005] The purpose of the present application is to solve the problem that after long-time use, even if the electric operating mechanism can drive the current to break, the switch may not be in place, the wire may not be completely disconnected from the contact of the circuit breaker, and always remains in a state of pseudo-disconnection. In this case, if fault maintenance is performed, it is extremely likely to cause a fire and other safety accidents, which seriously threatens the operation of the power grid and the safety of personnel. A reclosing molded case circuit breaker is proposed.

[0006] In order to achieve the above purpose, the application adopts the following technical solution: a reclosing molded case circuit breaker comprising a shell, the shell comprising a circuit breaker body and a switch gate, the bottom of the switch gate being provided with a wiring slot, further comprising: a switching assembly and an adjusting assembly arranged on both sides of the circuit breaker body. The toggle assembly comprises positioning columns fixed on both sides of the circuit breaker body, the outer wall of the positioning column is provided with a sleeve rod, and an elastic element is connected between the sleeve rod and the circuit breaker body, an inner embedding groove is formed in the side surface of the sleeve rod, an installation frame is fixed on the side surface of the circuit breaker body, a sliding block is slidably connected to the installation frame through an inner sliding groove, an extension rod is fixed to one side of the sliding block, an inner embedding rod is embedded in the inner embedding groove, and the inner embedding rod and the extension rod are connected through a connecting rod, a limiting groove is formed in the inner part of the circuit breaker body, two connecting columns are connected to one side of the sliding block and in contact with the limiting groove, and a clamping sleeve is connected to one side of the connecting column extending into the wiring groove, and the adjacent clamping sleeves are connected through a connecting rod. The sleeve rod is pushed to drive the connecting rod, the connecting rod drives the sliding block to descend, and the clamping sleeve is pulled down to make the wire away from the circuit breaker body.

[0007] As a further description of the above-mentioned technology, a reclosing molded case circuit breaker is provided: One of the connecting columns is connected to the sliding block through a limiting element, the limiting element comprises a moving groove formed in the inner part of the sliding block, the moving groove is connected to the connecting column through a moving block, and the moving block is slidably connected to the moving groove.

[0008] As a further description of the above-mentioned technology, a reclosing molded case circuit breaker is provided: The elastic element comprises a fixing frame fixed on the side surface of the circuit breaker body and a connecting frame fixed on the side surface of the sleeve rod, and a tension spring is connected between the connecting frame and the fixing frame.

[0009] As a further description of the above-mentioned technology, a reclosing molded case circuit breaker is provided: The positioning column has the same center as the switch gate.

[0010] As a further description of the above-mentioned technology, a reclosing molded case circuit breaker is provided: The adjusting assembly comprises a groove formed in the side surface of the switch gate and a through groove formed through the inner part of the sleeve rod, and an opening groove is formed in the side of the sleeve rod away from the switch gate, and the opening groove is in communication with the through groove.

[0011] As a further description of the above-mentioned technology, a reclosing molded case circuit breaker is provided: The inner wall of the through groove is slidably connected to an extension column in contact with the groove, the outer periphery of the extension column is fixed with a circular plate slidably connected to the opening groove, and the outer periphery of the extension column is sleeved with a telescopic spring.

[0012] As a further description of the above-mentioned technology, a reclosing molded case circuit breaker is provided: The side of the sleeve rod away from the switch gate is fixed with a fixed plate, and a micro electric push rod is installed on one side of the fixed plate, and a push block is fixed to the extension end of the micro electric push rod.

[0013] As a further description of the above-mentioned technology, a reclosing molded case circuit breaker is provided: The extension column and the pushing block are in contact, and the positions where the extension column and the pushing block are in contact are each provided with an inclined surface.

[0014] Therefore, the reclosing molded case circuit breaker has the following beneficial effects: When the switch is closed, the adjusting assembly drives the sleeve rod to rotate, the stretching spring is stretched, the inlaid rod drives the connecting rod, the sliding block descends in the sliding slot, the two connecting columns and the clamping sleeve move, the connecting column descends along the limiting groove, the wire is driven away from the conductive sheet, and the wire is completely separated from the circuit breaker body; when the wire continuously descends, one connecting column gradually moves away from the other, and the clamping sleeve is released from the clamping of the wire, which not only provides convenience for subsequent maintenance, but also ensures that the wire is not in a dangerous state and avoids fire; After the maintenance work is completed, the wire is placed between the two clamping sleeves, and the switch is opened; the adjusting assembly drives the sleeve rod to rotate again, the stretching spring in the stretching state gradually rebounds, the inlaid rod drives the connecting rod, the sliding block ascends in the sliding slot, the sliding block drives the connecting column and the clamping sleeve to move, one connecting column gradually moves close to the other, and the clamping sleeve clamps the wire to achieve fixation; after the wire is clamped, the wire continuously moves with the sliding block, the clamping sleeve and the wire gradually approach the conductive sheet, and after the switch is completely opened, the wire is tightly attached to the conductive sheet to complete the electrical connection; When it is required to keep the wire and the conductive sheet in continuous connection, the micro electric push rod is started to retract, the pushing block is separated from the contact with the extension column, the originally compressed extension spring rebounds, the pushing disc drives the extension column to separate from the groove, and the extension column does not move with the switch; at this time, the sleeve rod remains stationary under the stretching of the stretching spring, ensuring that the wire is always in close contact with the conductive sheet, and meeting the requirements of stable power supply and flexible adjustment in various working states; Conversely, when it is required to separate the wire from the conductive sheet, the micro electric push rod is started to extend, the pushing block moves towards the extension column, the pushing block pushes the extension column to move in the through groove under the action of the inclined surface, the pushing disc compresses the extension spring, and finally the extension column extends into the groove of the switch to make the sleeve rod work with the switch, so as to separate the wire from the conductive sheet and flexibly switch the working state. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The overall structure of the application is shown in the schematic diagram; Figure 2 The shell structure of the application is shown in the schematic diagram; Figure 3 Fig. 2 shows a schematic view of the structure of the toggle assembly according to the present application; Figure 4 Fig. 3 shows a schematic view of the structure of the mounting bracket according to the present application; Figure 5 Fig. 4 shows a schematic view of the structure of the toggle assembly according to the present application Figure 4 Fig. 5 shows a schematic view of the structure from another perspective; Figure 6 Fig. 6 shows a schematic view of the structure of the connecting rod according to the present application; Figure 7 Fig. 7 shows a schematic view of the structure of the toggle assembly according to the present application Figure 3 Fig. 8 shows a schematic view of the structure of the toggle assembly according to the present application Figure 8 Fig. 9 shows a schematic view of the structure of the micro electric push rod according to the present application.

[0016] Fig. 10 shows a schematic view of the structure of the micro electric push rod according to the present application. 10, housing; 11, circuit breaker body; 12, switch gate; 13, wiring slot; 20, toggle assembly; 21, positioning column; 22, sleeve rod; 221, fixing bracket; 222, connecting bracket; 223, tension spring; 23, embedded slot; 231, limiting slot; 24, mounting bracket; 241, sliding block; 242, extension rod; 243, embedded rod; 244, connecting rod; 25, connecting column; 251, clamping sleeve; 252, moving slot; 253, moving block; 254, connecting rod; 30, adjusting assembly; 31, groove; 311, through slot; 312, slotted; 32, fixing plate; 33, micro electric push rod; 34, push block; 35, extension column; 36, circular plate; 37, extension spring; 38, inclined surface. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0018] As shown in Figures 1-8 Fig. 1, the present application provides a reclosing molded case circuit breaker, which comprises a housing 10, the housing 10 comprises a circuit breaker body 11 and a switch gate 12, the bottom of the switch gate 12 is provided with a wiring slot 13, the inside of the wiring slot 13 is connected with a conductive sheet in contact with an electric wire, and further comprises a toggle assembly 20 and an adjusting assembly 30 arranged on both sides of the circuit breaker body 11. As shown in Figure 1 , Figure 3 , Figure 4 ,Figure 5 、 Figure 6 As shown in FIG. 1, the toggle assembly 20 comprises positioning posts 21 fixed on both sides of the circuit breaker body 11, the positioning posts 21 have the same center as the switch gate 12, the outer wall of the positioning posts 21 is provided with a sleeve rod 22, and the sleeve rod 22 is connected with the circuit breaker body 11 through an elastic member, the elastic member comprises a fixed frame 221 fixed on the side of the circuit breaker body 11 and a connecting frame 222 fixed on the side of the sleeve rod 22, the connecting frame 222 is connected with the fixed frame 221 through a tension spring 223, the elastic force of the tension spring 223 is not enough to pull the switch gate 12 to move, the side of the sleeve rod 22 is provided with an embedded groove 23, the side of the circuit breaker body 11 is fixed with a mounting frame 24, the mounting frame 24 is connected with a sliding block 241 through a sliding slot, one side of the sliding block 241 is fixed with an extension rod 242, the embedded groove 23 is embedded with an embedded rod 243, the embedded rod 243 is connected with the extension rod 242 through a connecting rod 244, the inside of the circuit breaker body 11 is provided with a limiting groove 231, one side of the sliding block 241 is connected with two connecting posts 25 in contact with the limiting groove 231, one side of the connecting post 25 is extended into the wiring groove 13 and connected with a clamp sleeve 251, the material of the clamp sleeve 251 is selected from insulating materials, adjacent clamp sleeves 251 are connected through a connecting rod 254, one of the connecting posts 25 is connected with the sliding block 241 through a limiting member, the limiting member comprises a moving slot 252 provided in the inside of the sliding block 241, the moving slot 252 is connected with the connecting post 25 through a moving block 253, and the moving block 253 is connected with the moving slot 252 through sliding connection; To prevent the switch gate 12 when closing, due to the electric operation mechanism long time use, mechanical parts wear, aging and other conditions, and then lead to the switch to the position, the wire is in the state of non-disconnection, not completely disconnected with the circuit breaker contact electrical connection, when the switch gate 12 is closed, the adjustment assembly 30 starts to work, drive sleeve rod 22 in the positioning column 21 rotation, with the rotation of the sleeve rod 22, the sleeve rod 22 will be through the connecting frame 222 pull the extension spring 223 to make it stretch, at the same time, embedded in the embedded groove 23 embedded rod 243 will be with the rotation of the sleeve rod 22 and push the connecting rod 244, in turn, make the connecting rod 244 push and slide block 241 in the installation frame 24 slide groove connected with the extension rod 242 drop, with the drop of the sliding block 241, the sliding block 241 will be synchronized with the two connecting columns 25 and the clamp 251 on the side move, in the connecting column 25 along the limit groove 231 move down, will drive the two clamp 251 between the wire away from the conductive sheet, so that the wire is completely disconnected with the circuit breaker body 11 contact, and, with the continuous decline of the connecting column 25, one of the connecting column 25 along the limit groove 231 move will along the limit groove 231 gradually away from the other connecting column 25, in turn, release the two clamp 251 between the wire clamping fixed, so not only for the subsequent maintenance provides the convenience, also ensures that the wire will not be in the danger of non-disconnection, avoid the occurrence of fire; When the maintenance work is completed, the wire needs to be placed between the two clamps 251, then, open the switch gate 12, the adjustment assembly 30 again drive sleeve rod 22 in the positioning column 21 rotation, with the rotation of the sleeve rod 22, the extension spring 223 in the state of stretch gradually rebound, at the same time, embedded in the embedded groove 23 embedded rod 243 will be with the rotation of the sleeve rod 22 and pull the connecting rod 244, make the connecting rod 244 push and slide block 241 in the installation frame 24 slide groove connected with the extension rod 242 rise, with the rise of the sliding block 241, the sliding block 241 will be synchronized with the two connecting columns 25 and the clamp 251 on the side move, in the connecting column 25 along the limit groove 231 move up, one of the connecting column 25 will gradually approach the other connecting column 25 along the limit groove 231, at the same time drive the clamp 251 clamp the wire, realize the fixation of the wire, when the wire is clamped, with the continuous movement of the sliding block 241, will drive the clamp 251 and the wire gradually close to the conductive sheet, when the switch gate 12 is completely opened, the wire will also be close to the conductive sheet, so as to complete the electrical connection.

[0019] As Figure 1 , Figure 3 , Figure 7 , Figure 8As shown, the adjusting assembly 30 comprises a groove 31 opened in the side surface of the switch gate 12 and a through groove 311 opened in the inside of the sleeve rod 22, the side of the sleeve rod 22 away from the switch gate 12 is provided with an open groove 312, and the open groove 312 is communicated with the through groove 311, the inner wall of the through groove 311 is slidingly connected with an extension column 35 in contact with the groove 31, the outer periphery of the extension column 35 is fixedly connected with a circular plate 36 slidingly connected with the open groove 312, the outer periphery of the extension column 35 is sleeved with a telescopic spring 37, the side surface of the sleeve rod 22 away from the switch gate 12 is fixedly connected with a fixed plate 32, and the side of the fixed plate 32 is provided with a micro electric push rod 33, and the extension end of the micro electric push rod 33 is fixedly connected with a pushing block 34, the extension column 35 is in contact with the pushing block 34, and the position where the extension column 35 is in contact with the pushing block 34 is provided with an inclined surface 38; When it is needed to keep the wire in continuous connection with the conductive sheet, the micro electric push rod 33 is started to perform a contraction action, and with the contraction of the micro electric push rod 33, the pushing block 34 is moved synchronously, so that the pushing block 34 gradually separates from the contact with the extension column 35, after the abutting action of the pushing block 34 disappears, the telescopic spring 37 in the original extrusion state starts to rebound, thereby pushing the circular plate 36 and driving the extension column 35 to separate from the groove 31, so that the extension column 35 will not move with the switch gate 12, in this state, the sleeve rod 22 remains stationary under the pulling of the stretching spring 223 and will not displace, so as to ensure that the wire is always in close contact with the conductive sheet, and this design can easily realize the adjusting requirement in various working states; Conversely, when it is needed to separate the wire from the conductive sheet, the micro electric push rod 33 is started again, but this time it performs an extension action, with the extension of the micro electric push rod 33, the pushing block 34 is moved in the direction of the extension column 35, and the contact between the two is realized through the inclined surface 38 therebetween, under the action of the inclined surface 38, the pushing block 34 pushes the extension column 35 to move in the through groove 311, at the same time, the circular plate 36 on the outer periphery of the extension column 35 extrudes the telescopic spring 37, finally, the extension column 35 extends into the groove 31 of the switch gate 12, so that the sleeve rod 22 can work with the switch gate 12, thereby realizing the separation of the wire from the conductive sheet.

[0020] Working principle: In order to avoid the switch gate 12 closing, due to the long-term use of the electric operating mechanism, the mechanical parts wear and age, the switch cannot be closed, the wire is in the dangerous state of non-disconnection, the switch gate 12 is closed, the adjusting assembly 30 is started, the sleeve rod 22 is rotated outside the positioning column 21, in the rotating process, the sleeve rod 22 pulls the tensile spring 223 to elongate through the connecting frame 222, at the same time, the embedded rod 243 embedded in the embedded groove 23 rotates with the sleeve rod 22, pushes the connecting rod 244, and then makes the sliding block 241 connected with the extension rod 242 in the mounting frame 24 slide in the sliding groove, when the sliding block 241 descends, the two connecting columns 25 and the clamp sleeve 251 on the side are driven to move, the connecting column 25 descends along the limiting groove 231, drives the wire between the two clamp sleeves 251 to move away from the conductive sheet, so that the wire is completely disconnected from the contact of the circuit breaker body 11, and with the continuous descent of the connecting column 25, one of the connecting columns 25 gradually moves away from the other along the limiting groove 231, and the clamping and fixing of the wire by the two clamp sleeves 251 is released, which not only provides convenience for subsequent maintenance, but also ensures that the wire will not be in a non-disconnection state, avoiding fire; If it is necessary to keep the wire connected with the conductive sheet, the micro electric push rod 33 is started to make it retract, which synchronously drives the push block 34 to move and gradually separate from the contact with the extension column 35, after the abutting action of the push block 34 disappears, the originally compressed extension spring 37 rebounds, the extension column 35 is driven by the push block 34 to move away from the recess 31, and the extension column 35 no longer moves with the switch gate 12, at this time, the sleeve rod 22 remains stationary under the pulling of the tensile spring 223, ensuring that the wire is always in close contact with the conductive sheet, and facilitating adjustment in various working states; On the contrary, if it is necessary to make the wire and the conductive sheet separate, the micro electric push rod 33 is started again to make it extend, which synchronously drives the push block 34 to move towards the extension column 35, and through the contact between the two, under the action of the inclined surface 38, the push block 34 pushes the extension column 35 to move in the through groove 311, at the same time, the round plate 36 on the outer periphery of the extension column 35 compresses the extension spring 37, finally, the extension column 35 extends into the recess 31 of the switch gate 12, so that the sleeve rod 22 can work with the switch gate 12, and the wire and the conductive sheet are separated.

[0021] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A reclosing molded case circuit breaker, comprising a housing (10), the housing (10) including a circuit breaker body (11) and a switch (12), wherein the bottom of the switch (12) is provided with a wiring groove (13), characterized in that, Also includes: A toggle assembly (20) and an adjustment assembly (30) are provided on both sides of the circuit breaker body (11). The actuating assembly (20) includes positioning posts (21) fixed on both sides of the circuit breaker body (11). A sleeve rod (22) is rotatably mounted on the outer wall of the positioning post (21), and an elastic element is connected between the sleeve rod (22) and the circuit breaker body (11). An embedded groove (23) is provided on the side of the sleeve rod (22). A mounting bracket (24) is fixed on the side of the circuit breaker body (11). A sliding block (241) is slidably connected to the mounting bracket (241) through an internal sliding groove, and an extension rod (241) is fixed on one side of the sliding block (241). 42), an embedded rod (243) is embedded inside the embedded groove (23). The embedded rod (243) and the extension rod (242) are connected by a connecting rod (244). A limiting groove (231) is opened inside the circuit breaker body (11). Two connecting posts (25) that contact the limiting groove (231) are connected to one side of the sliding block (241). One side of the connecting post (25) extends into the wiring groove (13) and is connected to a sleeve (251). Adjacent sleeves (251) are connected by a connecting rod (254). The lever (22) pushes the connecting rod (244), which in turn pushes the sliding block (241) down and pulls the clamp (251) down, so that the wire is away from the circuit breaker body (11).

2. A reclosing molded case circuit breaker according to claim 1, characterized in that, One of the connecting posts (25) is connected to the sliding block (241) by a limiting member, the limiting member including a moving groove (252) formed inside the sliding block (241), the moving groove (252) and the connecting post (25) are connected by a moving block (253), and the moving block (253) and the moving groove (252) are slidably connected.

3. A reclosing molded case circuit breaker according to claim 1, characterized in that, The elastic element includes a fixing frame (221) fixed to the side of the circuit breaker body (11) and a connecting frame (222) fixed to the side of the sleeve rod (22). A tension spring (223) is connected between the connecting frame (222) and the fixing frame (221).

4. A reclosing molded case circuit breaker according to claim 3, characterized in that, The center of the positioning post (21) is the same as that of the switch (12).

5. A reclosing molded case circuit breaker according to claim 1, characterized in that, The adjustment component (30) includes a groove (31) on the side of the switch (12) and a through groove (311) through the sleeve (22). The sleeve (22) has a groove (312) on the side away from the switch (12), and the groove (312) and the through groove (311) are connected.

6. A reclosing molded case circuit breaker according to claim 5, characterized in that, The inner wall of the through groove (311) is slidably connected to an extension column (35) that contacts the groove (31). The outer periphery of the extension column (35) is fixed with a circular plate (36) that is slidably connected to the slot (312). A telescopic spring (37) is sleeved on the outer periphery of the extension column (35).

7. A reclosing molded case circuit breaker according to claim 6, characterized in that, The sleeve rod (22) is fixed with a fixing plate (32) on the side away from the switch (12), and a miniature electric push rod (33) is installed on one side of the fixing plate (32), and a push block (34) is fixed to the extended end of the miniature electric push rod (33).

8. A reclosing molded case circuit breaker according to claim 7, characterized in that, The extension column (35) contacts the push block (34), and the position where the extension column (35) contacts the push block (34) is provided with a slope (38).

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