A low voltage circuit breaker with overload mechanical indication and mechanical tripping for a transformer

Abstract

The application discloses a low-voltage circuit breaker with overload mechanical indication and mechanical tripping for a transformer, and particularly relates to the technical field of circuit breakers, comprising a driving part as a power source, a timing indication assembly comprising an adjusting block and a pointer, and a tripping mechanism. The application sets the load evaluation time through the timing indication assembly, and automatically triggers the tripping mechanism after the set time is reached, so that active timing circuit breaking is realized, the proportion of the overload time of the line can be evaluated, the line operation condition can be judged, and the effect of preventing the transformer from accelerating insulation aging due to long-term overload is achieved. By pulling and rotating the pointer, the adjusting block can be separated from the active tripping assembly, so that the intervention of the timing evaluation mode is cancelled, the circuit breaker can be flexibly switched between the "timing evaluation mode" and the "normal overload protection mode", and different use scenarios and requirements can be adapted.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of circuit breaker, in particular to a low-voltage circuit breaker with overload mechanical indication and mechanical tripping for transformer. BACKGROUND

[0002] The circuit breaker refers to a switch device capable of closing, carrying and opening the current under normal loop conditions and capable of closing, carrying and opening the current under abnormal loop conditions within a specified time. The circuit breaker is divided into high-voltage circuit breaker and low-voltage circuit breaker according to its use range, and the high-low voltage boundary is relatively vague. Generally, the circuit breaker above 3kV is called high-voltage circuit breaker, which can be used to distribute electric energy, start the asynchronous motor infrequently, and protect the power supply line and motor, etc. When serious overload or short circuit and under-voltage fault occurs, it can automatically cut off the circuit, which is equivalent to the combination of fuse-type switch and over-voltage relay, and generally does not need to change parts after breaking the fault current.

[0003] In the prior art, the common circuit breaker generally automatically breaks the protection when the transformer has a short circuit or serious overload during use, but the bearing time of the transformer under different environmental and temperature overload conditions is different. However, sometimes the load may exceed for a period of time and then return to normal, at which time it is necessary to evaluate the overload condition of the low-voltage line or limit the long-term overload of the low-voltage line to prevent the aging of the transformer insulation from accelerating. Therefore, the conventional circuit breaker cannot complete the automatic tripping according to the specified time when evaluating the load condition of the line, thereby causing the long-term load of the line to affect its use effect. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a low-voltage circuit breaker with overload mechanical indication and mechanical tripping for transformer to solve the problems in the background art.

[0005] The above technical purpose of the present application is realized by the following technical scheme:

[0006] A low-voltage circuit breaker with overload mechanical indication and mechanical tripping for transformer, comprising

[0007] A driving member as a power source, the driving member is a constant speed driving device, preferably a motor rotating one week in twenty-four hours;

[0008] Timing indication assembly, comprising an adjusting block and a pointer, the pointer and the adjusting block can have a working state and a released state, in the working state, the pointer and the adjusting block are driven by the driving piece to rotate synchronously at the same center axis, the angle between the pointer and the trigger position in any set position can be measured, in the released state, the pointer and the adjusting block are prevented from being driven by the driving piece;

[0009] The pointer and the adjusting block have a trigger position respectively, and the pointer is in the trigger position when the adjusting block is in the trigger position;

[0010] Active tripping assembly, when the adjusting block rotates to the trigger position, the active tripping assembly can be triggered, so that the active tripping assembly drives the closing operation mechanism in the circuit breaker to perform the opening operation.

[0011] By adopting the above technical scheme, the pointer on the timing indication assembly is used to set the load evaluation time, and when the pointer rotates to the trigger position, the active tripping assembly is driven to operate, and the closing operation mechanism in the circuit breaker operates, so that the closing switch in the circuit breaker rotates and completes the circuit breaking operation, thereby active timing load circuit breaking can be performed, so that the overload time ratio of the line section can be judged to evaluate the operation of the line.

[0012] Preferably, the timing indication assembly further comprises a shell, a mounting plate fixedly installed on one side of the inside of the shell, a driving piece fixedly installed on one side of the mounting plate, a first scale ring fixedly installed on one side of the outside of the shell, a mounting cylinder fixedly installed in the inside of the shell, the position of the mounting cylinder corresponding to the first scale ring fixedly installed on the outside of the shell, a positioning rod movably sleeved in the inside of the mounting cylinder, a thread formed on the outer circumferential surface of the positioning rod, the positioning rod being threadedly connected with the mounting cylinder through the thread at the root, a first spring movably sleeved in the inside of the mounting cylinder for providing a reset spring force, an adjusting block fixedly installed on one end of the positioning rod, a pointer fixedly installed on the other end of the positioning rod, a butt joint block fixedly installed on one end of the driving shaft, a butt joint groove formed on one side of the adjusting block, the butt joint groove movably sleeving the butt joint block, and the butt joint groove being used for butt jointing the butt joint block for linkage.

[0013] By adopting the above technical scheme, the pointer is pulled to drive the positioning rod and the adjusting block to move, at this time, the butt joint block and the adjusting block are separated, and the adjusting block is away from the bottom of the active tripping assembly, and then the user can rotate the pointer to threadedly fix the positioning rod with the mounting cylinder, so that the pointer and the adjusting block do not interfere with the tripping operation, thereby canceling the timing evaluation mode and converting it to the normal mode for use.

[0014] Preferably, the active tripping assembly further comprises a first mounting seat fixedly installed on the inner side of the shell, the position of the first mounting seat corresponding to the mounting plate, a first connecting column movably sleeved in the first mounting seat, a second spring providing a reset rebound force movably sleeved on the outer circular wall surface of the first connecting column, a push block fixedly installed on the top surface of the first connecting column, an adjusting push rod fixedly installed on the inner side of the shell, a reset spring movably sleeved on the top of the adjusting push rod, the adjusting push rod being elastically connected with the shell through the reset spring, a second mounting seat fixedly installed on the inner side of the shell, the position of the second mounting seat being below the adjusting push rod, a second connecting column movably sleeved in the second mounting seat, a third spring providing a reset rebound force movably sleeved on the outer circular wall surface of the second connecting column, an accommodating block for linkage with the adjusting push rod fixedly installed on the top surface of the second connecting column, a pressing block fixedly installed on the bottom surface of the second connecting column, and a second adjusting plate slidably connected with the inner side of the shell, and a closing coil fixedly installed on one side of the second adjusting plate.

[0015] By adopting the above technical scheme, in the timing evaluation mode, since the driving member is a motor with a twenty-four-hour rotating shaft, the user can pull the pointer to separate the adjusting block from the docking block, and can rotate the pointer to cooperate with the first scale ring for time setting, and then drive the adjusting block and the docking block to be re-docked by the rebound force of the first spring. In this process, since the docking block is a multi-prism block and the docking groove is a multi-prism groove, the active rotation of the adjusting block will not affect the docking with the docking block. Then, when the protruding part on the surface of the adjusting block rotates to the bottom of the first mounting seat, the protruding part of the adjusting block will push the first connecting column and the push block to move upward. Then, the inclined surface on the side of the push block will press the adjusting push rod, so that the upward force is converted into the force for the lateral movement of the adjusting push rod. At this time, the inclined surface on the side of the moving adjusting push rod will press the accommodating block, so that the accommodating block converts the lateral pressing force of the adjusting push rod into downward pressure through the inclined surface. Then, the second connecting column will drive the pressing block to move downward at the same time. At this time, the pressing block will press the two second limiting rods to move away from each other, thereby releasing the limiting of the second adjusting plate, and making the second adjusting plate and the closing coil fall and hit the closing operating mechanism in the shell to complete the opening operation.

[0016] Preferably, one side of the shell is fixedly installed with a back plate through bolt fixing, one side of the back plate is threadedly connected with an adjusting screw rod, one end of the adjusting screw rod is rotatably connected with a push head, the push head is in the shape of a triangular pyramid, the diameter of the bottom of the push head gradually widens from front to back, the push head is slidably connected with the back plate through a guide rod, the bottom surface of the push head is fixedly installed with a bearing frame for bearing the second adjusting plate, the inner part of the bearing frame is slidably connected with two first limiting rods, the first limiting rods penetrate to the outside of the back plate, the outer circumferential surface of one end of the first limiting rods is provided with threads, one side of the second adjusting plate is provided with two limiting holes for abutting against the first limiting rods, one side of the inner part of the shell is rotatably connected with two second limiting rods, the two second limiting rods are arranged at intervals, one side of the inner part of the shell is fixedly installed with two tension springs, the second limiting rods are elastically connected in the inner part of the shell through the tension springs, one side of the second adjusting plate is fixedly installed with a handle, the handle penetrates to the outside of the shell, and the use position of the closing coil can be actively controlled from the outside through the handle, so that the mode switching of normal use and load timing evaluation is realized.

[0017] By adopting the above technical scheme, when it is needed to switch to the normal mode, the push head is moved by rotating the adjusting screw rod, then the push head enters between the two second limiting rods, and then the two second limiting rods are pressed away from each other by the inclined surface at the bottom of the push head, so that the limiting of the second adjusting plate is manually released, in this process, the movement of the push head drives the bearing frame to move together, then the bearing frame can butt against the falling second adjusting plate and closing coil, then the two first limiting rods are pushed and rotated by the user, at this time, the two first limiting rods pass through the two limiting holes on the surface of the second adjusting plate and are threadedly fixed with the threaded grooves of the shell, so that the closing coil can be switched to the normal use position.

[0018] Preferably, one side of the shell is fixedly installed with a mounting frame, one side of the mounting frame is provided with two fixing frames for mounting and fixing the shell.

[0019] By adopting the above technical scheme, the shell can be mounted in the equipment through the two fixing frames.

[0020] Preferably, one side of the mounting frame is rotatably connected with a first adjusting plate, the inner part of the first adjusting plate is fixedly installed with a scale needle, one side of the first adjusting plate is rotatably connected with an adjusting disc, one side of the adjusting disc is fixedly installed with a second scale ring for observing the perpendicularity, the first adjusting plate is fixedly connected with the mounting frame through bolts, and the adjusting disc is fixedly connected with the first adjusting plate through bolts.

[0021] By adopting the technical scheme, when the user installs the shell, the installation inclination degree of the shell can be known through the horizontal auxiliary installation tool, and then the user can turn the adjustment disc and the first adjustment plate into a rotatable state by loosening the bolts, and then the perpendicularity of the shell can be adjusted by observing the positions of the scale needle and the second scale ring, so that the perpendicularity of the shell during installation and use can be conveniently ensured.

[0022] Preferably, one side of the adjustment disc is fixedly provided with a shaft rod for overturning the shell, both ends of the shaft rod are rotatably connected with two fixed frames, and the two fixed frames are connected and fixed with the shaft rod through bolts.

[0023] By adopting the technical scheme, the user can know the longitudinal inclination angle of the shell during installation through the horizontal auxiliary installation tool, and then the user removes the bolts on the side edges of the two fixed frames, so that the adjustment disc and the two fixed frames can be rotated, thereby facilitating the adjustment of the longitudinal perpendicularity of the shell during installation.

[0024] Preferably, the back plate and the shell are sealingly connected through a sealing groove and a sealing ring.

[0025] By adopting the technical scheme, the back plate and the shell can be conveniently sealed, preventing water from entering the inside of the shell during long-term use.

[0026] In summary, the present application mainly has the following beneficial effects:

[0027] 1. The present application sets the load evaluation time through the timing indication assembly (pointer, first scale ring, driving piece), automatically triggers the tripping mechanism after reaching the set time, realizes active timing tripping, can be used for evaluating the overload time proportion of the line, judging the line operation, and achieves the effect of preventing the transformer from accelerating insulation aging due to long-term overload.

[0028] 2. By pulling and rotating the pointer, the adjustment block can be disconnected from the active tripping assembly, thereby canceling the intervention of the timing evaluation mode, enabling the circuit breaker to flexibly switch between the "timing evaluation mode" and the "normal overload protection mode", and adapting to different use scenarios and needs.

[0029] 3. The present application pushes the first connecting column, the adjustment push rod, the second connecting column and a series of mechanical transmissions through the adjustment block protrusion, finally opens the second limiting rod by the pressure block extrusion, releases the closing coil, triggers the tripping by pure mechanical transmission, and the action is reliable, ensuring that the circuit breaking operation can be accurately completed at the set time point.

[0030] 4、The application can manually open the second limiting rod by rotating the adjusting screw rod to push the push head, so that the closing coil can be lowered to the normal working position and locked by the first limiting rod, thereby facilitating the user to manually and safely switch the circuit breaker from the evaluation mode to the normal use mode and ensuring the position stability of the closing coil in the normal mode.

[0031] 5、The application installs the circuit breaker shell in the equipment by the mounting frame and the fixing frame, so that a stable and reliable mounting structure is provided to ensure the stability of the circuit breaker during operation.

[0032] 6、The application can adjust the horizontal and vertical degree of the shell during installation by the first adjusting plate, the adjusting disc, the scale needle and the second scale ring, so that the vertical degree of the circuit breaker installation is ensured, which is helpful to ensure the accuracy and reliability of the internal mechanism operation and prolong the service life. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a schematic diagram of the three-dimensional structure of the application;

[0034] Figure 2 is a schematic diagram of the back plate structure of the application;

[0035] Figure 3 is a schematic diagram of the shell structure of the application;

[0036] Figure 4 is a schematic diagram of the adjusting push rod structure of the application;

[0037] Figure 5 is a schematic diagram of the installation cylinder structure of the application;

[0038] Figure 6 is a schematic diagram of the adjusting block structure of the application;

[0039] Figure 7 is a schematic diagram of the first installation seat structure of the application;

[0040] Figure 8 is a schematic diagram of the second installation seat structure of the application;

[0041] Figure 9 is a schematic diagram of the second adjusting plate structure of the application;

[0042] Figure 10 is a schematic diagram of the push head structure of the application;

[0043] Figure 11 is a schematic diagram of the mounting frame structure of the application;

[0044] Figure 12 is a schematic diagram of the adjusting disc structure of the application.

[0045] 100, housing; 200, mounting frame; 210, first adjusting plate; 211, scale needle; 220, adjusting disc; 221, second scale ring; 222, shaft rod; 230, fixing frame; 300, back plate; 310, adjusting screw; 311, push head; 312, receiving frame; 320, first limiting rod; 400, mounting plate; 410, first scale ring; 420, pointer; 430, mounting cylinder; 431, positioning rod; 432, first spring; 440, driving member; 441, abutting block; 442, adjusting block; 443, abutting groove; 500, first mounting seat; 501, first connecting column; 502, second spring; 503, push block; 510, adjusting push rod; 511, return spring; 520, second mounting seat; 521, second connecting column; 522, third spring; 523, pressing block; 524, receiving block; 530, second adjusting plate; 531, closing coil; 532, second limiting rod; 533, tension spring; 534, handle; 535, limiting hole. DETAILED DESCRIPTION

[0046] 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.

[0047] Embodiment: Referring to Figure 1 , Figure 2 and Figure 3 , a low-voltage circuit breaker with overload mechanical indication and mechanical tripping for a transformer comprises:

[0048] The driving member 440 is a constant-speed driving device, and is preferably an electric motor rotating one revolution per twenty-four hours.

[0049] Referring to Figure 4 , Figure 5 and Figure 6 , the timing indication assembly comprises the adjusting block 442 and the pointer 420, and the pointer 420 and the adjusting block 442 can have a working state and a released state. In the working state, the pointer 420 and the adjusting block 442 are driven to rotate synchronously at a uniform speed on the same central shaft by the driving member 440, and the included angle of the pointer 420 at any set position and a triggering position can be measured. In the released state, the pointer 420 and the adjusting block 442 are prevented from being driven by the driving member 440.

[0050] The pointer 420 and the adjusting block 442 respectively have a triggering position, and the pointer 420 is in the triggering position when the adjusting block 442 is also in the triggering position.

[0051] Reference Figure 7 and Figure 8 , the active tripping assembly can trigger the active tripping assembly when the adjusting block 442 rotates to the trigger position, so that the active tripping assembly drives the closing operation mechanism inside the circuit breaker to perform the opening operation;

[0052] Wherein, the load evaluation time is set by the pointer 420 on the timing indication assembly, and when the pointer 420 rotates to the trigger position, the active tripping assembly is driven to operate, and the closing operation mechanism inside the circuit breaker is rotated to complete the circuit breaking operation, so that the active timing load circuit breaking can be performed, and the overload time ratio of the line can be judged to evaluate the operation of the line.

[0053] Based on the above embodiment, reference Figure 2 、 Figure 3 、 Figure 9 and Figure 10 , the timing indication assembly further comprises a housing 100, a cavity is formed in the housing 100, a mounting plate 400 is fixedly installed on one side of the housing 100, one side of the mounting plate 400 is fixedly installed with a driving piece 440, a first scale ring 410 is fixedly installed on one side of the housing 100, a mounting cylinder 430 is fixedly installed in the housing 100, the position of the mounting cylinder 430 corresponds to the first scale ring 410 fixedly installed on the outside of the housing 100, a positioning rod 431 is movably sleeved in the mounting cylinder 430, a thread is formed on the outer circumferential surface of the positioning rod 431, the positioning rod 431 is screwed with the mounting cylinder 430 through the thread at the root, a first spring 432 is movably sleeved in the mounting cylinder 430 to provide a reset spring force, an adjusting block 442 is fixedly installed on one end of the positioning rod 431, a pointer 420 is fixedly installed on the other end of the positioning rod 431, a driving shaft of the driving piece 440 is fixedly installed with a butt joint block 441, a butt joint groove 443 is formed on one side of the adjusting block 442, the butt joint groove 443 is movably sleeved with the butt joint block 441, and the butt joint groove 443 is used for butt joint with the butt joint block 441 for linkage use.

[0054] Wherein, the pointer 420 is pulled to drive the positioning rod 431 and the adjusting block 442 to move, at this time, the butt joint block 441 and the adjusting block 442 are separated, and the adjusting block 442 is away from the bottom of the active tripping assembly, and then the user can rotate the pointer 420 to screw the positioning rod 431 with the mounting cylinder 430, so that the pointer 420 and the adjusting block 442 do not intervene in the tripping operation, thereby canceling the timing evaluation mode and converting it to the normal mode for use, which is the release state.

[0055] Based on the above embodiment, reference Figure 3 、 Figure 4 ,Figure 7 and Figure 8 The active tripping assembly further comprises a first mounting seat 500 fixedly installed on the inner side of the shell 100 corresponding to the mounting plate 400, a first connecting column 501 movably sleeved in the first mounting seat 500, a second spring 502 for providing a reset rebound force movably sleeved on the outer circumferential wall surface of the first connecting column 501, a push block 503 fixedly installed on the top surface of the first connecting column 501, an adjusting push rod 510 fixedly installed on the inner side of the shell 100, a reset spring 511 movably sleeved on the top of the adjusting push rod 510, the adjusting push rod 510 being elastically connected with the shell 100 through the reset spring 511, a second mounting seat 520 fixedly installed on the inner side of the shell 100 and located below the adjusting push rod 510, a second connecting column 521 movably sleeved in the second mounting seat 520, a third spring 522 for providing a reset rebound force movably sleeved on the outer circumferential wall surface of the second connecting column 521, an abutment block 524 for linkage with the adjusting push rod 510 fixedly installed on the top surface of the second connecting column 521, a pressing block 523 fixedly installed on the bottom surface of the second connecting column 521, and a second adjusting plate 530 slidably connected with the inner side of the shell 100 and having a closing coil 531 fixedly installed on one side thereof.

[0056] In the timing evaluation mode, since the driving member 440 is a motor for rotating a twenty-four-hour shaft for one circle, the user can pull the pointer 420 to separate the adjusting block 442 from the abutment block 441 to enter the release state, and can rotate the pointer 420 to cooperate with the first scale ring 410 for time setting, and then drive the adjusting block 442 and the abutment block 441 to re-engage through the rebound force of the first spring 432. In this process, since the abutment block 441 is a multi-prism block and the abutment groove 443 is a multi-prism groove, the active rotation of the adjusting block 442 will not affect the engagement with the abutment block 441. Then, when the protruding part on the surface of the adjusting block 442 is rotated to the bottom of the first mounting seat 500, the protruding part of the adjusting block 442 will push the first connecting column 501 and the push block 503 to move upward, which is the working state. Then, the inclined surface on the side of the push block 503 will press the adjusting push rod 510, so that the upward force is converted into the lateral moving force of the adjusting push rod 510. At this time, the inclined surface on the side of the moving adjusting push rod 510 will press the abutment block 524, so that the abutment block 524 converts the lateral pressing force of the adjusting push rod 510 into downward pressure through the inclined surface. Then, the second connecting column 521 will drive the pressing block 523 to move downward at the same time. At this time, the pressing block 523 will press the two second limiting rods 532 to move away from each other, so as to release the limiting of the second adjusting plate 530, and make the second adjusting plate 530 and the closing coil 531 fall and hit the closing operating mechanism in the shell 100 to complete the circuit breaking operation.

[0057] Based on the above embodiments, with reference to Figure 2 , Figure 9 and Figure 10 , one side of the shell 100 is fixedly installed with a back plate 300 by bolts, one side of the back plate 300 is threadedly connected with an adjusting screw 310, one end of the adjusting screw 310 is rotatably connected with a push head 311, the push head 311 is in the shape of a triangular pyramid, the diameter of the bottom thereof gradually widens from front to back, the push head 311 is slidably connected with the back plate 300 through a guide rod, the bottom surface of the push head 311 is fixedly installed with a receiving frame 312 for supporting the second adjusting plate 530, the inside of the receiving frame 312 is slidably connected with two first limiting rods 320, the first limiting rods 320 penetrate to the outside of the back plate 300, the outer circumferential surface of one end of the first limiting rods 320 is provided with threads, one side of the second adjusting plate 530 is provided with two limiting holes 535 which are in abutment with the first limiting rods 320, one side of the inside of the shell 100 is rotatably connected with two second limiting rods 532, the two second limiting rods 532 are arranged at intervals, one side of the inside of the shell 100 is fixedly installed with two tension springs 533, the second limiting rods 532 are elastically connected to the inside of the shell 100 through the tension springs 533, one side of the second adjusting plate 530 is fixedly installed with a handle 534, the handle 534 penetrates to the outside of the shell 100, and the use position of the closing coil 531 can be actively controlled from the outside through the handle 534, so as to realize mode switching of normal use and load timing evaluation.

[0058] When it is needed to switch to the normal mode, the push head 311 is moved by rotating the adjusting screw 310, then the push head 311 enters between the two second limiting rods 532, and then the two second limiting rods 532 are pressed away from each other by the inclined surface at the bottom of the push head 311, so that the limiting of the second adjusting plate 530 is manually released, in this process, the movement of the push head 311 drives the receiving frame 312 to move together, then the receiving frame 312 can butt against the falling second adjusting plate 530 and the closing coil 531, then the two first limiting rods 320 are pushed and rotated by the user, at this time, the two first limiting rods 320 pass through the two limiting holes 535 on the surface of the second adjusting plate 530, and are threadedly fixed with the threaded grooves of the shell 100, so that the closing coil 531 can be switched to the normal use position.

[0059] Based on the above embodiments, with reference to Figure 1 , Figure 2 , Figure 11 and Figure 12A mounting bracket 200 is fixedly installed on one side of the housing 100. Two fixing brackets 230 for mounting and fixing the housing 100 are provided on one side of the mounting bracket 200. A first adjusting plate 210 is rotatably connected to one side of the mounting bracket 200. A scale needle 211 is fixedly installed inside the first adjusting plate 210. An adjusting disc 220 is rotatably connected to one side of the first adjusting plate 210. A second scale ring 221 for observing verticality is fixedly installed on one side of the adjusting disc 220. The first adjusting plate 210 is connected and fixed to the mounting bracket 200 by bolts. The adjusting disc 220 is connected and fixed to the first adjusting plate 210 by bolts. A shaft 222 for driving the housing 100 to rotate is fixedly installed on one side of the adjusting disc 220. The two ends of the shaft 222 are rotatably connected to the two fixing brackets 230 respectively. The two fixing brackets 230 are connected and fixed to the shaft 222 by bolts.

[0060] When the user installs the housing 100, the horizontal auxiliary installation tool can be used to determine the installation tilt of the housing 100. The user can then loosen the bolts to make the adjusting plate 220 and the first adjusting plate 210 rotatable. By observing the position of the scale needle 211 and the second scale ring 221, the user can adjust the verticality of the housing 100, thus ensuring the verticality of the housing 100 during installation and use. The user can also use the horizontal auxiliary installation tool to determine the longitudinal tilt angle of the housing 100 during installation. The user can then remove the bolts on the sides of the two fixing brackets 230, allowing the adjusting plate 220 and the two fixing brackets 230 to rotate, thus facilitating the adjustment of the longitudinal verticality of the housing 100 during installation.

[0061] Working principle: Please refer to Figures 1-12 As shown, during use, the load assessment time is set by the pointer 420 and the first scale ring 410 on the timing indicator component. When the pointer 420 rotates to the top, the active trip component is activated, and then the two second limit rods 532 in the limit component open away from each other. At this time, the second adjustment plate 530, which is released from the limit, will cause the closing coil 531 to fall downward. Then, the armature striker inside the closing coil 531 will strike the closing operation mechanism inside the housing 100, thereby causing the closing switch inside the housing 100 to rotate and complete the circuit breaking operation. This can be used to perform active timed load circuit breaking, which can be used to determine the overload time ratio of the line segment to evaluate the operation of the line. When normal use is required, the limit component is used to reach the normal use position, so that the closing coil 531 completes the closing operation through the normal overload current. This achieves the effect of freely switching between the two modes of timed assessment and normal use.

[0062] By pulling the pointer 420 to drive the positioning rod 431 and the adjusting block 442 to move, the docking block 441 and the adjusting block 442 are separated, and the adjusting block 442 is away from the bottom of the main tripping assembly, so that the user can rotate the pointer 420 to make the positioning rod 431 threadedly fixed with the installation cylinder 430, so that the pointer 420 and the adjusting block 442 do not interfere with the tripping operation, thereby canceling the timing evaluation mode and converting it to the normal mode for use;

[0063] In the timing evaluation mode, the driving member 440 is a motor that rotates a twenty-four-hour shaft for one revolution, so that the user can pull the pointer 420 to separate the adjusting block 442 from the docking block 441 into a released state, and can rotate the pointer 420 to cooperate with the first scale ring 410 for time setting, and then drive the adjusting block 442 and the docking block 441 to re-dock by the rebound force of the first spring 432. In this process, because the docking block 441 is a multi-pyramid block and the docking groove 443 is a multi-pyramid groove, the active rotation of the adjusting block 442 does not affect the docking with the docking block 441. Then, when the protruding part on the surface of the adjusting block 442 rotates to the bottom of the first installation seat 500, the protruding part of the adjusting block 442 will push the first connecting column 501 and the push block 503 upward, which is the working state. Then, the inclined surface on the side of the push block 503 will press the adjusting push rod 510, so that the upward force is converted into the lateral moving force of the adjusting push rod 510. At this time, the inclined surface on the side of the moving adjusting push rod 510 will press the receiving block 524, so that the receiving block 524 converts the lateral pressing force of the adjusting push rod 510 into downward pressure through the inclined surface. Then, the second connecting column 521 will drive the pressing block 523 to move downward at the same time, so that the pressing block 523 will press the two second limiting rods 532 to move away from each other, thereby releasing the limiting of the second adjusting plate 530, and making the second adjusting plate 530 and the closing coil 531 fall to hit the closing operating mechanism inside the shell 100 to complete the breaking operation;

[0064] When it is needed to switch to the normal mode, the push head 311 is moved by rotating the adjusting screw 310, so that the push head 311 enters between the two second limiting rods 532. Then, the two second limiting rods 532 are pressed away from each other by the inclined surface on the bottom of the push head 311, so that the limiting of the second adjusting plate 530 is manually released. In this process, the movement of the push head 311 drives the receiving frame 312 to move together, so that the receiving frame 312 can dock the falling second adjusting plate 530 and closing coil 531. Then, the user pushes and rotates the two first limiting rods 320, so that the two first limiting rods 320 pass through the two limiting holes 535 on the surface of the second adjusting plate 530, and are threadedly fixed with the threaded groove of the shell 100. In this way, the closing coil 531 can be switched to the normal use position.

[0065] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A low voltage circuit breaker with overload mechanical indication and mechanical tripping for a transformer, characterized in that, The utility model relates to a kind of circuit breaker, including: A shell (100) is formed with a cavity inside it; Driving member (440) as power source; Timing indication component, including adjusting block (442) and pointer (420), the pointer (420) and the adjusting block (442) can have working state and release state, in working state, the pointer (420) and the adjusting block (442) are driven by the driving member (440) and rotate synchronous uniform speed on the same center axis, in release state, the pointer (420) and the adjusting block (442) are prevented by the driving member (440) and driven; The pointer (420) and the adjusting block (442) have trigger position respectively, and the pointer (420) is in trigger position when the adjusting block (442) is also in trigger position, the pointer (420) and the adjusting block (442) can rotate synchronous uniform speed on the same center axis; The included angle of the pointer (420) in any set position and trigger position can be measured; Active tripping component, when the adjusting block (442) rotates to trigger position, active tripping component can be triggered, so that active tripping component drives the closing operation mechanism inside the circuit breaker to execute closing operation; The active tripping component further includes first installation seat (500), the first installation seat (500) is fixedly installed on the inside one side of the shell (100), the inside of the first installation seat (500) movably sleeved with first connecting column (501), the outer circular wall surface of the first connecting column (501) movably sleeved with second spring (502) for providing reset resilience for the first connecting column (501), the top surface of the first connecting column (501) is fixedly installed with push block (503), the inside one side of the shell (100) is fixedly installed with adjusting push rod (510), the top of the adjusting push rod (510) movably sleeved with reset spring (511), the adjusting push rod (510) is elastically connected with the shell (100) by the reset spring (511), the inside one side of the shell (100) is fixedly installed with second installation seat (520), its position is below the adjusting push rod (510), the inside of the second installation seat (520) movably sleeved with second connecting column (521), the outer circular wall surface of the second connecting column (521) movably sleeved with third spring (522) for providing reset resilience, the top surface of the second connecting column (521) is fixedly installed with receiving block (524) for linkage with adjusting push rod (510), the bottom surface of the second connecting column (521) is fixedly installed with pressure block (523), the inside one side of the shell (100) is slidably connected with second adjusting plate (530), and one side of the second adjusting plate (530) is fixedly installed with closing coil (531).

2. The low voltage circuit breaker with overload mechanical indication and mechanical trip for a transformer as claimed in claim 1 wherein, The timing indication component further comprises a mounting plate (400) fixedly installed on the inside of the shell (100), the position of the mounting plate (400) corresponding to the first installation seat (500), one side of the mounting plate (400) fixedly installed with a driving member (440), the outside of the shell (100) fixedly installed with a first scale ring (410), the inside of the shell (100) fixedly installed with an installation cylinder (430), the position of the installation cylinder (430) corresponding to the first scale ring (410) fixedly installed on the outside of the shell (100), the inside of the installation cylinder (430) movably sleeved with a positioning rod (431), the outer circular wall surface of the positioning rod (431) being provided with threads, the positioning rod (431) being threadedly connected with the installation cylinder (430) through the root threads, the inside of the installation cylinder (430) movably sleeved with a first spring (432) for providing a reset resilience, one end of the positioning rod (431) fixedly installed with an adjusting block (442), the other end of the positioning rod (431) fixedly installed with a pointer (420), one end of the driving shaft of the driving member (440) fixedly installed with a butt joint block (441), one side of the adjusting block (442) provided with a butt joint groove (443), the inner wall surface of the butt joint groove (443) movably sleeved with the butt joint block (441), the butt joint groove (443) used for butt jointing the butt joint block (441) to make them linked and used together.

3. The low voltage circuit breaker with overload mechanical indication and mechanical trip for a transformer as claimed in claim 1 wherein: One side of the shell (100) is fixedly installed with a back plate (300), one side of the back plate (300) is threadedly connected with an adjusting screw rod (310), one end of the adjusting screw rod (310) is rotatably connected with a push head (311), the push head (311) is in the shape of a triangular pyramid, the diameter of the bottom thereof is gradually widened from front to back, the push head (311) is slidably connected with the back plate (300) through a guide rod, the bottom surface of the push head (311) is fixedly installed with a bearing frame (312) for bearing the second adjusting plate (530), the inside of the bearing frame (312) is slidably connected with two first limiting rods (320), the first limiting rods (320) penetrate through the outside of the back plate (300), the outer circumferential surface of one end of the first limiting rods (320) is provided with threads, one side of the second adjusting plate (530) is provided with two limiting holes (535) which are in abutment with the first limiting rods (320), one side of the inside of the shell (100) is rotatably connected with two second limiting rods (532), the two second limiting rods (532) are arranged at intervals, one side of the inside of the shell (100) is fixedly installed with two tension springs (533), the second limiting rods (532) are elastically connected in the inside of the shell (100) through the tension springs (533), one side of the second adjusting plate (530) is fixedly installed with a handle (534), the handle (534) penetrates through the outside of the shell (100), and the use position of the closing coil (531) can be actively controlled from the outside through the handle (534), so that the mode switching of normal use and load timing evaluation can be realized.

4. The low voltage circuit breaker with overload mechanical indication and mechanical trip for a transformer as claimed in claim 2 wherein: One side of the shell (100) is fixedly installed with a mounting rack (200), one side of the mounting rack (200) is provided with two fixing racks (230) for mounting and fixing the shell (100).

5. The low voltage circuit breaker with overload mechanical indication and mechanical trip for a transformer as claimed in claim 4 wherein: One side of the mounting rack (200) is rotatably connected with a first adjusting plate (210), the inside of the first adjusting plate (210) is fixedly installed with a scale needle (211), one side of the first adjusting plate (210) is rotatably connected with an adjusting disc (220), one side of the adjusting disc (220) is fixedly installed with a second scale ring (221) for observing the perpendicularity, the first adjusting plate (210) is fixedly connected with the mounting rack (200) through bolts, and the adjusting disc (220) is fixedly connected with the first adjusting plate (210) through bolts.

6. The low voltage circuit breaker with overload mechanical indication and mechanical trip for a transformer as claimed in claim 5 wherein: One side of the adjusting disc (220) is fixedly installed with a shaft rod (222) for driving the shell (100) to overturn, both ends of the shaft rod (222) are rotatably connected with two fixing racks (230), and the two fixing racks (230) are fixedly connected with the shaft rod (222) through bolts.

7. A low voltage circuit breaker with overload mechanical indication and mechanical tripping for a transformer as claimed in claim 3, wherein: The back plate (300) and the shell (100) are sealingly connected through a sealing groove and a sealing ring.

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