Anti-electric shock multipurpose electric energy metering box

Abstract

This invention relates to the field of electricity metering technology and discloses a multi-purpose electricity metering box for protection against electric shock. The box includes a chassis and a circuit breaker housed within it. The circuit breaker includes a main housing with at least one current transformer and at least one support. Each current transformer has an isolating switch hinged to it. The end of the isolating switch away from the current transformer is detachably connected to the corresponding support. The box also includes a control unit. By setting up the control unit, the operation of the isolating switches is changed from manual to foot-operated. The operator only needs to step on the drive pedal to remotely separate each isolating switch from the support via a rotating shaft and linkage mechanism, thus achieving non-contact tripping. This avoids the operator's hands and body coming into contact with exposed incoming power lines, significantly reducing the risk of electric shock.

Description

Technical Field

[0001] This invention relates to the field of electricity metering technology, specifically to a multi-purpose electricity metering box that is resistant to electric shock. Background Technology

[0002] Electricity metering boxes are specialized enclosures in power systems used to install and protect electricity metering devices. They typically integrate key electrical equipment such as circuit breakers, current transformers, and isolating switches, playing a crucial role in ensuring accurate electricity metering and electrical safety. Existing electricity metering boxes generally use isolating switches to control circuit connection and disconnection. Operators must manually operate the isolating switch to separate it from its corresponding support when disconnecting the circuit. For example, patent document CN211124227U discloses a prepaid combined metering box with an isolating switch, which includes a base on which a circuit breaker and a combined current transformer are mounted. The circuit breaker is equipped with an isolating switch, which simultaneously controls the connection and disconnection of three-phase circuits via a linkage shaft. In this design, operators usually need to directly contact or manually operate the isolating switch at close range. However, due to the compact internal structure of the metering box, the power supply line at the top of the isolating switch is often exposed. When replacing the electricity meter or performing other maintenance work, operators are in close proximity to live parts, posing a significant risk of electric shock. Meanwhile, due to the limited working space inside the metering box, operators face restricted movement when manually operating the isolating switch, making operation inconvenient and compromising stability and safety. Therefore, there is an urgent need for an energy metering box that enables non-contact operation of the isolating switch, effectively reducing the risk of electric shock, and allowing for convenient operation even in confined spaces. Summary of the Invention

[0003] The main objective of this invention is to provide a multi-purpose electric energy metering box that is protected against electric shock, in order to solve the problems of existing electric energy metering boxes where the isolating switch requires manual operation, which leads to operators having to come into close contact with live parts, resulting in a high risk of electric shock, and is inconvenient to operate in a confined space and has poor stability.

[0004] To achieve the above objectives, the present invention provides a multi-purpose electric energy metering box for protection against electric shock, including a chassis and a circuit breaker disposed therein. The circuit breaker includes a main shell, on which at least one current transformer and at least one bracket are provided. Each current transformer is hinged with an isolating blade. The end of the isolating blade away from the current transformer is detachably connected to the corresponding bracket. The circuit breaker also includes a control unit. The control unit includes a rotating shaft and a drive pedal. The rotating shaft is rotatably mounted on the main housing, and the drive pedal is fixed to one end of the rotating shaft. A linkage mechanism is connected between the rotating shaft and each isolation blade. The linkage mechanism is configured to drive each isolation blade to separate from its corresponding bracket when the driving pedal is stepped on and the rotating shaft is rotated.

[0005] Preferably, the linkage mechanism includes an insulating pull rod and a drive arm. The insulating pull rod is hinged to the middle of each isolation blade. The end of the insulating pull rod away from the isolation blade is hinged to one end of the drive arm, and the other end of the drive arm is fixedly sleeved on the rotating shaft.

[0006] Preferably, the anti-electric shock multi-purpose energy metering box also includes a buffer mechanism. The buffer mechanism includes a rotating rocker arm, a guide rocker arm, a first spring, and a spring push ring; The first end of the rocker arm is fixedly sleeved on the rotating shaft, and the second end is fixedly equipped with a sliding rod. The first end of the guide rod is hinged to the chassis and has a spring seat plane, and the second end has a sliding groove along its length. A first spring and a spring push ring are sleeved on the guide rod. The slide bar slides into the slide groove, one end of the spring push ring abuts against the second end of the rotating shaft rocker arm, the other end abuts against one end of the first spring, and the other end of the first spring abuts against the spring seat plane.

[0007] Preferably, a long adjustment groove is formed through the second end of the rocker arm along its length, and the slide rod is installed at the long adjustment groove and slides within the groove after passing through the long adjustment groove; The hinge point between the first end of the guide lever and the chassis is located directly below the pivot.

[0008] Preferably, there are three current transformers and three brackets, and each bracket has an insulator on its periphery, with each insulator corresponding to a disconnecting blade.

[0009] Preferably, the control unit also includes two mounting plates, both of which are fixed to the main housing, and each mounting plate is equipped with a bearing seat, with the rotating shaft mounted on the bearing seat; The chassis includes a metering chamber, a mounting chamber, and an operating chamber. The metering chamber and the operating chamber are located on opposite sides of the mounting chamber and each is equipped with a switch door. The circuit breaker is installed in the mounting chamber, and an energy meter is installed in the metering chamber. One end of the rotating shaft passes through the operating chamber and is fixedly connected to the drive pedal.

[0010] Preferably, an extension rod is fixed at both ends of the drive pedal.

[0011] Preferably, each support has a first wedge-shaped block at its top; Two second springs are fixed at the end of the isolating knife away from the current transformer. The free ends of the two second springs are arranged facing each other and each is fixed with a clamping block. The two clamping blocks can clamp the first wedge block together. Each clamping block has two first inclined surfaces on its side facing the first wedge block, and the first inclined surfaces can abut against the inclined wall of the first wedge block.

[0012] Preferably, each isolation blade is equipped with a locking mechanism; The locking mechanism includes a guide tube, a third spring, a mounting block, and a locking arm; The top end of the guide tube and the top end of the third spring are both fixed to the inner top wall of the mounting cavity of the chassis. The third spring is sleeved inside the guide tube and its lower end passes through the guide tube and is fixedly connected to the mounting block. A second wedge block is fixed on the mounting block. One end of the locking arm is fixedly connected to the end of the isolating knife away from the current transformer, and forms an angle with the isolating knife. The connection between the two is hinged to the corresponding current transformer. Two fourth springs are fixed to the other end of the locking arm. The free ends of the two fourth springs are arranged facing each other and each is fixed with a trigger block. Two second inclined surfaces are formed on each trigger block. The second inclined surfaces can abut against the inclined wall of the first wedge block or the inclined wall of the second wedge block.

[0013] The beneficial effects of the above scheme are: By installing a control unit, the operation of the isolating switches has been changed from manual to foot-operated. Operators only need to press the drive pedal to remotely separate each isolating switch from its support via a rotating shaft and linkage mechanism, achieving contactless disconnection. This avoids the operator's hands and body coming into contact with exposed power lines, significantly reducing the risk of electric shock. Simultaneously, foot operation is not limited by the confined space inside the metering box, making operation more convenient and effortless, with stable and controllable movements, effectively improving operational safety. The metering box has a compact structure, is flexible and adaptable to various installation scenarios, and possesses high practicality and electric shock protection performance. Attached Figure Description

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another perspective; Figure 3 This is a schematic diagram of the first cross-sectional view of the present invention; Figure 4 yes Figure 3 Enlarged structural diagram of region A in the middle; Figure 5 yes Figure 3 Another structural diagram from a different perspective; Figure 6 This is a schematic diagram of the second cross-sectional view of the present invention; Figure 7 yes Figure 6 A magnified structural diagram of region B in the middle; Figure 8 yes Figure 6 A magnified structural diagram of region C in the middle; Figure 9 yes Figure 6 A schematic diagram of the front view structure.

[0016] Explanation of reference numerals in the attached figures 1. Chassis; 11. Metering chamber; 111. Switch door; 12. Mounting chamber; 13. Operating chamber; 2. Circuit breaker; 21. Main casing; 22. Current transformer; 23. Support frame; 231. Insulator; 232, First wedge block; 24, Isolation knife; 242, Clamping block; 2421, First inclined plane; 3. Control unit; 31. Rotating shaft; 32. Drive pedal; 321. Extension rod; 33. Linkage mechanism; 331. Insulated pull rod; 332. Drive arm; 34. Buffer mechanism; 341. Rotating shaft rocker arm; 3411. Slide rod; 3412. Long adjustment groove; 342. Guide swing rod; 3421. Spring seat plane; 3422. Slide groove; 343. First spring; 344. Spring push ring; 35. Mounting plate; 351. Bearing seat; 4. Locking mechanism; 41. Guide tube; 42. Third spring; 43. Mounting block; 44. Second wedge block; 45. Locking arm; 47. Trigger block; 471. Second inclined plane. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below. Example

[0018] Reference Figures 1-9 The electric shock-proof multi-purpose power metering box provided by this invention is mainly used for the installation and protection of power metering devices in power systems. It solves the problems of existing metering boxes requiring manual operation of the isolating switch, high risk of electric shock, and inconvenience of operation in confined spaces. Its specific structure includes a chassis 1, a circuit breaker 2, a control unit 3, and a locking mechanism 4. All components work together to achieve non-contact opening and closing operations, improving the safety and convenience of power operation.

[0019] The chassis 1 serves as the overall mounting carrier, employing a partitioned structural design. Specifically, it includes a metering chamber 11, a mounting chamber 12, and an operating chamber 13. The metering chamber 11 and operating chamber 13 are located on opposite sides of the mounting chamber 12, and each of the three is independently equipped with a switch door 111. This design achieves physical isolation between the electrical equipment, metering device, and operating components, further reducing the risk of electric shock. The metering chamber 11 houses the electricity meter for accurate measurement of electrical energy. The mounting chamber 12 houses the circuit breaker 2, serving as the core component for circuit switching. The operating chamber 13 accommodates the operating components of the control unit 3, providing a safe operating space for operators.

[0020] Reference Figure 6 The circuit breaker 2 includes a main housing 21, which serves as the mounting base for the circuit breaker 2. Three current transformers 22 and three supports 23 are fixedly mounted on the main housing 21. Each current transformer 22 corresponds to one support 23, adapting to the needs of three-phase circuits and improving the versatility of the metering box. Each support 23 is surrounded by an insulator 231, which corresponds to an isolating blade 24. Through the insulating effect of the insulator 231, the support 23 is effectively isolated from the chassis 1 and other components, avoiding the risk of electric shock due to leakage and further enhancing the equipment's anti-electric shock performance. Each current transformer 22 is hinged with an isolating blade 24. The end of the isolating blade 24 away from the current transformer 22 can be detachably connected to the corresponding support 23. When the isolating blade 24 is connected to the support 23, the circuit is in a conducting state; when they are separated, the circuit is in a disconnected state, realizing the core control of circuit on / off.

[0021] The control unit 3 is the core component for realizing non-contact opening and closing operations. It is used to drive the isolation blades 24 to separate or connect with the bracket 23. Specifically, it includes a rotating shaft 31, a drive pedal 32, a linkage mechanism 33, a buffer mechanism 34, and two mounting plates 35. (Refer to...) Figure 9 Both mounting plates 35 are bolted to the main housing 21 and are symmetrically distributed on both sides of the main housing 21. Each mounting plate 35 has a bearing seat 351 fixedly installed on it. The rotating shaft 31 is rotatably mounted between the two bearing seats 351. The bearing seats 351 support the rotating shaft 31, ensuring smooth and stable rotation, reducing frictional loss during rotation, and extending the service life of the control unit 3. One end of the rotating shaft 31 passes through the side wall of the mounting cavity 12 and enters the operating cavity 13, where it is fixedly connected to the drive pedal 32. This allows the operator to drive the rotating shaft 31 to rotate by stepping on the drive pedal 32 from inside the operating cavity 13, without having to enter the mounting cavity 12 to contact live parts, thus fundamentally avoiding the risk of electric shock.

[0022] Reference Figures 1-9To improve the ease of operation of the drive pedal 32 and accommodate operators of different heights and operating habits, an extension rod 321 is fixed to both ends of the drive pedal 32. The extension rod 321 is integrally formed with the drive pedal 32, which increases the stepping lever arm, making it easier for the operator to step on the pedal and expanding the operating range, avoiding the problem of not being able to step smoothly due to limited operating space. Specifically, during the closing operation, the operator steps on the extension rod 321 at one end of the drive pedal 32, causing the rotating shaft 31 to rotate in the reverse direction; during the opening operation, the operator steps on the extension rod 321 at the other end of the drive pedal 32, causing the rotating shaft 31 to rotate in the forward direction. By stepping on the extension rod 321 at different ends, the operator can achieve forward and reverse rotation of the rotating shaft 31, thereby driving the opening and closing of the isolating switch 24.

[0023] The control unit 3, through the coordinated action of the linkage mechanism 33 and the buffer mechanism 34, converts the rotation of the rotating shaft 31 into the opening and closing action of the isolating blades 24, ensuring that each isolating blade 24 operates synchronously and improving the stability and consistency of operation. The linkage mechanism 33 is used to directly drive the isolating blades 24 to rotate around the hinge point of the current transformer 22. It includes an insulating pull rod 331 and a drive arm 332. Each isolating blade 24 has an insulating pull rod 331 hinged to its middle through a hinge shaft. The insulating pull rod 331 is made of high-strength insulating material, which can both transmit driving force and provide insulation, preventing current from being conducted through the linkage mechanism 33 and further reducing the risk of electric shock. The end of the insulating pull rod 331 away from the isolating blade 24 is hinged to one end of the drive arm 332 through the hinge shaft. The other end of the drive arm 332 is fixedly sleeved on the rotating shaft 31, and the three drive arms 332 are evenly distributed along the axial direction of the rotating shaft 31, corresponding one-to-one with the three isolating blades 24.

[0024] When the rotating shaft 31 rotates in the forward direction (opening), it drives the three drive arms 332 to rotate synchronously in the forward direction. When the drive arms 332 rotate, they pull the insulating rod 331 through the hinge shaft. The insulating rod 331 then pulls the isolating knife 24 to rotate around the hinge point of the current transformer 22, thus separating the isolating knife 24 from the bracket 23. When the rotating shaft 31 rotates in the reverse direction (closing), it drives the three drive arms 332 to rotate synchronously in the reverse direction. When the drive arms 332 rotate, they pull the insulating rod 331 through the hinge shaft. The insulating rod 331 then pulls the isolating knife 24 to rotate around the hinge point of the current transformer 22, thus connecting the isolating knife 24 to the bracket 23. The structure is simple and the transmission is reliable, ensuring that the three isolating knives 24 operate synchronously and avoiding circuit failures caused by abnormal operation of a single isolating knife 24.

[0025] The buffer mechanism 34 assists the linkage mechanism 33 in its operation, improving the stability and reliability of the opening and closing action of the isolation knife 24. It includes a rotating shaft rocker arm 341, a guide rocker rod 342, a first spring 343, and a spring push ring 344. The first end of the rotating shaft rocker arm 341 is fixedly sleeved on the rotating shaft 31 and rotates synchronously with it. The second end of the rotating shaft rocker arm 341 has a long, elongated adjustment groove 3412 extending along its length. A slide rod 3411 is installed within the long, elongated adjustment groove 3412, allowing the slide rod 3411 to slide along the length of the long, elongated adjustment groove 3412, facilitating adjustment of its position to suit different transmission requirements. The first end of the guide rocker arm 342 is hinged to the inner wall of the mounting cavity 12 of the chassis 1, and the hinge point is located directly below the rotating shaft 31. This position design ensures that the swing direction of the guide rocker arm 342 matches the rotation direction of the rotating shaft rocker arm 341, thereby improving transmission efficiency. The first end of the guide rocker arm 342 is also provided with a spring seat plane 3421 for supporting the first spring 343. The second end of the guide rocker arm 342 has a sliding groove 3422 along its length. The slide rod 3411 passes through the elongated adjustment groove 3412 and slides within the sliding groove 3422, so that when the rotating shaft rocker arm 341 rotates, the slide rod 3411 can slide simultaneously within the elongated adjustment groove 3412 and the sliding groove 3422, causing the guide rocker arm 342 to swing around its hinge point with the chassis 1.

[0026] A first spring 343 and a spring push ring 344 are fitted onto the guide rocker arm 342. One end of the spring push ring 344 abuts against the second end of the rotating shaft rocker arm 341, and the other end abuts against one end of the first spring 343. The other end of the first spring 343 abuts against the spring seat plane 3421. When the rotating shaft 31 rotates in the reverse direction (closing) or in the forward direction (opening), causing the rotating shaft rocker arm 341 to rotate, the rotating shaft rocker arm 341 will squeeze or stretch the first spring 343 through the spring push ring 344. The elastic force generated by the first spring 343 can buffer the rotation of the rotating shaft rocker arm 341, avoiding excessive rotation speed that could cause the isolating knife 24 to collide violently with the bracket 23. At the same time, after the operation is completed, it can help the rotating shaft 31 maintain its current position, ensuring the stable connection or separation of the isolating knife 24 and the bracket 23, and improving the reliability of the operation.

[0027] The elongated adjustment groove on the rotating shaft rocker arm allows the slide rod to slide along the groove, adjusting the position of the slide rod (i.e., the lever arm length) and thus changing the magnitude of the buffer torque. This allows the buffer mechanism to adapt to different assembly tolerances and wear conditions. The preload of the first spring 343 is transmitted to the rotating shaft through the mechanism, forming a self-locking torque at the open or closed position. This helps the rotating shaft maintain its position at the end point, effectively preventing accidental slippage or loosening of the isolating blade due to vibration, gravity, or other external forces, thus improving the reliability of closing conduction and opening isolation. The smooth operation avoids jumping or arcing of the isolating blade during opening and closing, reducing the risk of misoperation. Combined with foot-operated drive, it isolates the human body from live parts, further enhancing the protection against electric shock. When the rotating shaft drives the isolating blade to open or close, the rotating shaft rocker arm rotates with the shaft, sliding the slide rod within the groove of the guide rocker arm, compressing or stretching the first spring. The spring force dampens the rotation of the shaft, absorbing the impact energy during operation, preventing violent collisions between the isolating blade and the support at the moment of contact or separation, protecting the contact system, and extending the mechanical life of the equipment.

[0028] To achieve a stable and reliable electrical connection between the isolating switch 24 and the bracket 23, and to ensure that the two can be smoothly separated when the circuit is tripped, the present invention optimizes the connection structure between the isolating switch 24 and the bracket 23.

[0029] Each bracket 23 has a first wedge block 232 integrally formed at its top. The cross-section of the first wedge block 232 is wedge-shaped, which facilitates its cooperation with the clamping structure on the isolation blade 24. Two second springs (not shown in the figure) are fixed to the end of the isolation blade 24 away from the current transformer 22. The free ends of the two second springs are arranged facing each other, and each free end is fixed with a clamping block 242. The two clamping blocks 242 are arranged opposite each other to form a clamping space for clamping the first wedge block 232. Two first inclined surfaces 2421 are opened on the side of each clamping block 242 facing the first wedge block 232. The inclination angle of the first inclined surface 2421 matches the inclination angle of the inclined wall of the first wedge block 232, so that it can closely abut against the inclined wall of the first wedge block 232.

[0030] When closing the circuit, the operator steps on the extension rod 321 at one end of the drive pedal 32 inside the operating chamber 13, causing the rotating shaft 31 to rotate in the opposite direction. When the rotating shaft 31 rotates, the drive arm 332 pulls the insulating rod 331, which in turn pulls the isolating knife 24 to rotate around the hinge point of the current transformer 22, causing the end of the isolating knife 24 away from the current transformer 22 to move towards the support 23.

[0031] When the two clamping blocks 242 on the isolating blade 24 contact the first wedge block 232 at the top of the bracket 23, the inclined wall of the first wedge block 232 abuts against the first inclined surface 2421 on the clamping block 242. As the isolating blade 24 continues to move towards the bracket 23, the first wedge block 232 exerts a squeezing force on the two clamping blocks 242 to both sides, forcing the two clamping blocks 242 to overcome the elastic force of the second spring and open to both sides until the first wedge block 232 is completely inserted into the clamping space formed by the two clamping blocks 242. At this time, the second spring returns to its original deformation, driving the two clamping blocks 242 to move towards each other, tightly gripping the first wedge block 232, realizing a stable and reliable electrical connection between the isolating blade 24 and the bracket 23, and completing the closing operation.

[0032] When the circuit breaker is tripped, the operator steps on the extension rod 321 at the other end of the drive pedal 32 inside the operating chamber 13, causing the rotating shaft 31 to rotate in the forward direction. When the rotating shaft 31 rotates, the drive arm 332 pulls the insulating rod 331, which in turn pulls the isolating knife 24 to rotate in the reverse direction around the hinge point of the current transformer 22, causing the end of the isolating knife 24 away from the current transformer 22 to move away from the bracket 23.

[0033] At this point, the pulling force of the isolating blade 24 will cause the two clamping blocks 242 to move synchronously. As the constraint force of the first wedge block 232 on the clamping blocks 242 gradually decreases, the two clamping blocks 242 maintain a relatively clamped state under the elastic force of the second spring, but will not tightly grip the first wedge block 232 to avoid forming an electrical connection. As the isolating blade 24 continues to move, the two clamping blocks 242 will gradually detach from the first wedge block 232, ultimately achieving complete separation of the isolating blade 24 from the bracket 23, disconnecting the circuit, and completing the tripping operation. This design effectively avoids the problem of the circuit not being completely disconnected due to the isolating blade 24 and clamping blocks 242 gripping the first wedge block 232 during tripping, ensuring the reliability of the tripping operation and further reducing the risk of electric shock.

[0034] To further improve the stability of the isolating switch 24 after it is closed and to prevent the isolating switch 24 from being accidentally opened due to external force collisions, vibrations and other factors, each isolating switch 24 is equipped with a locking mechanism 4, which includes a guide tube 41, a third spring 42, a mounting block 43 and a locking arm 45.

[0035] The top end of the guide tube 41 and the top end of the third spring 42 are both fixed to the inner top wall of the mounting cavity 12 of the housing 1. The guide tube 41 is vertically arranged, and the third spring 42 is sleeved inside the guide tube 41. The lower end of the third spring 42 passes through the guide tube 41 and is fixedly connected to the mounting block 43. The guide tube 41 guides the extension and retraction of the third spring 42, preventing the third spring 42 from shifting or twisting during the extension and retraction process, and ensuring that the mounting block 43 can move stably in the vertical direction. A second wedge block 44 is fixedly provided on the mounting block 43. The structure of the second wedge block 44 is similar to that of the first wedge block 232, which facilitates cooperation with the trigger block 47 on the locking arm 45.

[0036] One end of the locking arm 45 is fixedly connected to the end of the isolating blade 24 away from the current transformer 22, and a fixed angle is formed between the locking arm 45 and the isolating blade 24. The connection point between the two is hinged to the corresponding current transformer 22, so that when the isolating blade 24 rotates, it will drive the locking arm 45 to rotate synchronously around the hinge point of the current transformer 22. The other end of the locking arm 45 is fixed with two fourth springs (not marked in the figure). The free ends of the two fourth springs are arranged facing each other, and each free end is fixed with a trigger block 47. A second inclined surface 471 is formed on each trigger block 47. The inclination angle of the second inclined surface 471 matches the inclination angle of the inclined wall of the first wedge block 232 and the inclined wall of the second wedge block 44, so that it can closely abut against the inclined walls of the two.

[0037] When the isolating blade 24 closes and the two clamping blocks 242 grip the first wedge block 232, the isolating blade 24 will drive the locking arm 45 to rotate synchronously, causing the two trigger blocks 47 at the other end of the locking arm 45 to move directly below the second wedge block 44. At this time, the second wedge block 44 moves downward under the elastic force of the third spring 42, and its inclined wall abuts against the second inclined surface 471 on the trigger block 47, generating a compressive force on both sides of the trigger block 47, forcing the two trigger blocks 47 to overcome the elastic force of the fourth spring and open to both sides until the second wedge block 44 is completely inserted between the two trigger blocks 47. The fourth spring then returns to its original deformation, causing the two trigger blocks 47 to grip the second wedge block 44, thus locking and fixing the locking arm 45. Since the locking arm 45 is fixedly connected to the isolating blade 24, the isolating blade 24 is locked, preventing accidental rotation of the isolating blade 24 and ensuring the stability of the closed state.

[0038] When the circuit breaker needs to be tripped, the operator steps on the extension rod 321 at the other end of the drive pedal 32, which drives the rotating shaft 31 to rotate in the forward direction. The isolating knife 24 then drives the locking arm 45 to rotate in the reverse direction. The trigger block 47 on the locking arm 45 will pull the second wedge block 44 to move upward, overcoming the elastic force of the third spring 42, so that the second wedge block 44 is disengaged from the two trigger blocks 47. The locking mechanism 4 releases the locking of the isolating knife 24, and the isolating knife 24 can be smoothly separated from the bracket 23, ensuring that the tripping operation is carried out smoothly.

[0039] The electric shock-proof multi-purpose energy metering box of the present invention, through the design of the control unit 3, changes the operation mode of the isolating blades 24 from the traditional manual operation to a foot-driven non-contact operation. The operator only needs to step on the extended rod 321 of the drive pedal 32 in the operating cavity 13 (one end of the closing pedal drives the rotating shaft 31 to rotate in the reverse direction, and the other end of the opening pedal drives the rotating shaft 31 to rotate in the forward direction), and the three isolating blades 24 can be driven to open and close synchronously through the linkage mechanism 33 and the buffer mechanism 34. There is no need to contact the live parts in the mounting cavity 12, which fundamentally solves the problem that the operator of the existing metering box needs to contact the live parts at close range and has a high risk of electric shock.

[0040] Meanwhile, the foot-operated mode is not limited by the narrow space of the installation cavity 12. The design of the extended rod 321 further improves the convenience and labor-saving of operation. The buffering effect of the buffer mechanism 34 ensures the stability of operation and avoids damage to the equipment caused by violent collisions. The wedge-shaped fit and spring clamping structure between the isolating knife 24 and the bracket 23 ensure the stability of the electrical connection when closing and the smooth separation when opening. The locking mechanism 4 effectively prevents the isolating knife 24 from accidentally opening, further improving the safety and reliability of the equipment.

[0041] In addition, the partitioned design of the chassis 1, the insulating function of the insulator 231, and the insulating design of the insulating rod 331 further enhance the equipment's protection against electric shock. The configuration of three current transformers 22 and three brackets 23 adapts to the usage requirements of three-phase circuits, improves the versatility of the metering box, and can be widely used in various power metering scenarios, with high practicality and promotional value.

[0042] Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

Claims

1. A multi-purpose electric shock-proof energy metering box, comprising a chassis (1) and a circuit breaker (2) disposed therein, the circuit breaker (2) comprising a main shell (21), the main shell (21) being provided with at least one current transformer (22) and at least one bracket (23), each current transformer (22) being hinged with an isolating blade (24), the end of the isolating blade (24) away from the current transformer (22) being detachably connected to the corresponding bracket (23), characterized in that, It also includes a control unit (3); The control unit (3) includes a rotating shaft (31) and a drive pedal (32). The rotating shaft (31) is rotatably mounted on the main housing (21), and the drive pedal (32) is fixed to one end of the rotating shaft (31). A linkage mechanism (33) is connected between the rotating shaft (31) and each of the isolation blades (24). The linkage mechanism (33) is configured to drive each isolation blade (24) to separate from the corresponding bracket (23) when the driving pedal (32) is stepped on to drive the rotating shaft (31) to rotate.

2. The anti-electric shock multi-purpose energy metering box according to claim 1, characterized in that, The linkage mechanism (33) includes an insulating pull rod (331) and a drive arm (332). The insulating pull rod (331) is hinged to the middle of each isolation blade (24). One end of the insulating pull rod (331) away from the isolation blade (24) is hinged to one end of the drive arm (332). The other end of the drive arm (332) is fixedly sleeved on the rotating shaft (31).

3. The anti-electric shock multi-purpose energy metering box according to claim 2, characterized in that, It also includes a buffer mechanism (34); The buffer mechanism (34) includes a rotating rocker arm (341), a guide rocker arm (342), a first spring (343) and a spring push ring (344). The first end of the rotating shaft rocker arm (341) is fixedly sleeved on the rotating shaft (31), and the second end is fixedly provided with a slide rod (3411). The first end of the guide rocker arm (342) is hinged to the chassis (1) and has a spring seat plane (3421). The second end has a groove (3422) along its length. The first spring (343) and the spring push ring (344) are sleeved on the guide rocker arm (342). The slide bar (3411) is slidably fitted in the slide groove (3422), one end of the spring push ring (344) abuts against the second end of the rotating shaft rocker arm (341), and the other end abuts against one end of the first spring (343), and the other end of the first spring (343) abuts against the spring seat plane (3421).

4. The anti-electric shock multi-purpose energy metering box according to claim 3, characterized in that, The second end of the rotating rocker arm (341) has an elongated adjustment groove (3412) extending through its length. The slide rod (3411) is installed at the elongated adjustment groove (3412) and slides within the slide groove (3422) after passing through the elongated adjustment groove (3412). The first end of the guide rocker arm (342) is hinged to the chassis (1) at a point directly below the pivot (31).

5. The anti-electric shock multi-purpose energy metering box according to claim 1, characterized in that, There are three current transformers (22) and three brackets (23). Each bracket (23) has an insulator (231) on its periphery. The insulator (231) corresponds one-to-one with the isolation knife (24).

6. The anti-electric shock multi-purpose energy metering box according to claim 1, characterized in that, The control unit (3) also includes two mounting plates (35), both of which are fixed to the main housing (21). Each mounting plate (35) has a bearing seat (351) mounted on it, and the rotating shaft (31) is mounted on the bearing seat (351). The chassis (1) includes a metering chamber (11), an installation chamber (12) and an operating chamber (13). The metering chamber (11) and the operating chamber (13) are located on both sides of the installation chamber (12) and each is provided with a door (111). The circuit breaker (2) is installed in the mounting cavity (12), and an energy meter is installed in the metering cavity (11); One end of the rotating shaft (31) passes through the operating cavity (13) and is fixedly connected to the drive pedal (32).

7. The anti-electric shock multi-purpose energy metering box according to claim 1, characterized in that, An extension rod (321) is fixed at both ends of the drive pedal (32).

8. The anti-electric shock multi-purpose energy metering box according to claim 1, characterized in that, Each of the brackets (23) has a first wedge (232) at its top. Two second springs are fixed to the end of the isolation blade (24) away from the current transformer (22). The free ends of the two second springs are arranged facing each other and each is fixed with a clamping block (242). The two clamping blocks (242) can clamp the first wedge block (232) together. Each clamping block (242) has two first inclined surfaces (2421) on the side facing the first wedge block (232), and the first inclined surfaces (2421) can abut against the inclined wall of the first wedge block (232).

9. The anti-electric shock multi-purpose energy metering box according to claim 8, characterized in that, Each of the isolation blades (24) is equipped with a locking mechanism (4); The locking mechanism (4) includes a guide tube (41), a third spring (42), a mounting block (43) and a locking arm (45). The top end of the guide tube (41) and the top end of the third spring (42) are both fixed to the inner top wall of the mounting cavity (12) of the chassis (1). The third spring (42) is sleeved inside the guide tube (41) and its lower end passes through the guide tube (41) and is fixedly connected to the mounting block (43). A second wedge block (44) is fixed on the mounting block (43). One end of the locking arm (45) is fixedly connected to the end of the isolation blade (24) away from the current transformer (22), and forms an angle with the isolation blade (24). The connection between the two is hinged to the corresponding current transformer (22). Two fourth springs are fixed at the other end of the locking arm (45). The free ends of the two fourth springs are arranged facing each other and each is fixed with a trigger block (47). Two second inclined surfaces (471) are formed on each trigger block (47). The second inclined surface (471) can abut against the inclined wall of the first wedge block (232) or the inclined wall of the second wedge block (44).

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