External lead wire device of electric power meter box

Abstract

The invention discloses an outer lead wire device of an electric power meter box, and belongs to the technical field of electric power meter boxes, the outer lead wire device of the electric power meter box comprises an electric power meter box body and a main body bin installed on a box door of the electric power meter box body, the main body bin is composed of four groups of upper bin bodies and lower bin bodies, and the lower bin bodies are located right below the upper bin bodies; a protection mechanism connected with a power supply circuit in the electric power meter box body is arranged in the upper bin body, an attaching mechanism matched with the protection mechanism is arranged in the lower bin body, and a self-locking mechanism is arranged at the bottom of the attaching mechanism. According to the invention, multiple groups of external leads are uniformly fixed through the insertion blocks of the integration mechanism, when a certain group of protection mechanism or a corresponding instrument box line fails, the leads do not need to be disassembled one by one, switching can be completed only through three steps of pressing the locking and attaching mechanism, rotating and unlocking the integration mechanism and pulling, inserting and replacing the insertion blocks, the operation time is greatly shortened, and the working efficiency is improved. Moreover, the wires are prevented from being mixed and damaged, and the maintenance efficiency is remarkably improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of electric power meter box, and particularly relates to an electric power meter box external lead connection device. BACKGROUND

[0002] The electric power meter box is an electric power measurement and control device providing a solution for electric power parameter measurement, electric power quality monitoring and analysis, and electric equipment control. With the development of electric power construction and diversified power demand, the number and types of outdoor electric power meter boxes are increasing. An external lead connection device is needed when installing the electric power meter box, and is widely used outdoors.

[0003] The existing electric power meter box external lead connection device usually only relies on a single switch or a wiring contact to realize circuit on-off, and does not have a special double protection structure. When encountering voltage fluctuation, line overload and other special conditions, the single protection mechanism is easy to fail, resulting in circuit misoperation or poor contact, and the stability of power supply between the electric power meter box and the external equipment cannot be guaranteed. Moreover, the existing electric power meter box external lead connection often involves parallel connection of multiple groups of lines, and the multiple groups of lines are not integrated and designed. Each group of lines needs to be separately connected and fixed with the internal lines of the meter box. When a group of connection lines or the corresponding output lines in the meter box fail, all external lead connections need to be removed one by one for troubleshooting and reconnection, which is a tedious and time-consuming process that seriously affects maintenance efficiency. In addition, the scattered arrangement of lines is prone to entanglement and disorder, further increasing the difficulty of troubleshooting and line replacement. At the same time, the existing external lead connection is usually fixed by bolts or cables. On the one hand, the bolts are easy to loosen due to vibration and external force, and the cable binding cannot guarantee the tight contact between the lines and the terminal, which will cause insufficient electrical connection stability, even virtual connection heating, line falling off and other problems. On the other hand, such fixing methods need to use special tools such as screwdrivers and wrenches to complete the operation. In a small working space or without tools, it is difficult to quickly install and remove the lines, and it does not meet the convenience requirements of relevant specifications for incoming and outgoing line fixation. SUMMARY

[0004] The technical problem to be solved by the present application is to overcome the shortcomings of the existing technology and provide an electric power meter box external lead connection device.

[0005] The technical scheme adopted to solve the above technical problems is as follows: an external leading wiring device of an electric power meter box, comprising an electric power meter box body and a main body bin installed on a box door of the electric power meter box body, the main body bin is composed of four groups of upper bins and lower bins, and the lower bins are located directly below the upper bins, the inside of the upper bin is provided with a protection mechanism connected with a power supply line inside the electric power meter box body, the inside of the lower bin is provided with a fitting mechanism matched with the protection mechanism, the bottom of the fitting mechanism is provided with a self-locking mechanism, the inside of the fitting mechanism is provided with a plug-in mechanism for fixing the head end of the external leading wiring, and the plug-in mechanism is arranged in the inside of the fitting mechanism through an integration mechanism.

[0006] Further, the protection mechanism comprises an overvoltage protector, the overvoltage protector is located in the inside of the upper bin, the input end of the overvoltage protector is electrically connected with the power supply line inside the electric power meter box body through a wire, and the output end of the overvoltage protector is provided with a contact end, and the bottom end of the contact end extends to the inner top of the lower bin.

[0007] Through the above technical scheme, the output end of the overvoltage protector is provided with an output contact end, and the output contact end extends to the inner top of the lower bin, and forms a butt joint reservation with the conductive part of the fitting mechanism, when the output line of the meter box appears overvoltage, the overvoltage protector automatically cuts off the circuit, under normal working conditions, the current is conducted to the output contact end through the overvoltage protector, and waits to be conducted with the fitting mechanism, so as to realize the first safety protection of the circuit, avoid the damage of overvoltage to the equipment and the line through the overvoltage protector, and the extension design of the output contact end ensures the accurate butt joint with the fitting mechanism, lays a foundation for subsequent double insurance, and guarantees the safety and reliability of circuit conduction.

[0008] Further, the fitting mechanism comprises a lifting seat located in the inside of the lower bin, four slide rods are symmetrically installed at the positions of four corners in the inside of the lower bin, and the four groups of slide rods respectively pass through the four corners of the lifting seat, the bottom of the outer side of the slide rod is sleeved with a first spring, the top end of the first spring is fixedly connected with the bottom of the lifting seat, the front surface of the lifting seat is provided with a slot, the top of the slot is uniformly provided with an L-shaped conductive sheet matched with the contact end, and the bottom end of the L-shaped conductive sheet extends to the end of the inside of the slot far away from the outlet thereof.

[0009] By the technical scheme, the descending seat is movably installed in the lower bin body through the four corner sliding rods, the first spring outside the sliding rods provides elastic restoring force for the descending seat, the inserted slot of the descending seat is used for inserting the integration mechanism, the L-shaped conductive sheet in the inserted slot is matched with the output contact end, after the self-locking mechanism is unlocked, the elastic potential energy of the first spring pushes the descending seat to rise, the top of the L-shaped conductive sheet is tightly attached to the bottom end of the output contact end, a circuit conduction channel is formed, in the locking state, the descending seat is pressed down, the L-shaped conductive sheet is separated from the output contact end, and the circuit is cut off. Through the lifting structure of the spring-sliding rod, the second circuit on-off control is realized, double switch safety is formed with the overvoltage protector, the attachment design of the L-shaped conductive sheet and the output contact end ensures that the conductive contact is tight, reduces the risk of false connection heating, guarantees the on-off stability, and meets the circuit control requirements under different working conditions.

[0010] Further, the self-locking mechanism includes two groups of fixed buckles, which are symmetrically installed at the middle positions of the two sides in the lower bin body, a pair of sliding grooves is symmetrically formed at the two sides of the bottom of the descending seat, a pair of sliding blocks is symmetrically arranged at the side away from each other in the two pairs of sliding grooves, a moving buckle matched with the fixed buckle is jointly installed at the outside of the two groups of sliding blocks at the same side, a second spring is symmetrically installed at the side close to each other in the two pairs of sliding grooves, and one end of the second spring close to the descending seat is fixedly connected with the sliding block.

[0011] Through the technical scheme, the fixed buckle is fixed to the inner side of the lower bin body, the sliding block is installed in the sliding groove at the bottom of the descending seat, the moving buckle matched with the fixed buckle is connected to the outside of the sliding block, the elastic restoring force is provided by the second spring at the inner side, the unlocking component is used for controlling the opening and closing of the moving buckle, when the descending seat is pressed down, the fixed buckle extrudes the moving buckle to make them close to each other, the sliding block slides along the sliding groove, and the second spring stores energy. When the moving buckle is lowered below the fixed buckle, the second spring pushes the moving buckle to reset and is clamped with the fixed buckle, so that the descending seat is locked. Pressing the unlocking component can drive the moving buckle to be close again, so that the clamping is released, the reliable locking and quick unlocking of the descending seat are realized, the L-shaped conductive sheet and the output contact end are stably separated in the locked state, and the circuit can be quickly conducted after being unlocked, the operation convenience is improved, the structure design is compact, the self-locking performance is stable, and the circuit false on-off caused by vibration and other external forces is avoided.

[0012] Further, the unlocking component includes a hinge shaft at the middle position of the bottom of the descending seat, two groups of pressing strips are crossly arranged at the middle position of the bottom of the descending seat through the hinge shaft, one end of the two groups of pressing strips close to the sliding groove is symmetrically hinged with a connecting plate, and the end of the connecting plate away from the hinge shaft is hinged with the middle position of the back surface of the adjacent group of second springs.

[0013] By the above technical scheme, the two groups of pressing strips are cross-mounted on the bottom of the lifting seat by the hinge shaft, one end of the pressing strip is hinged with the moving buckle through the connecting plate, when the end of the pressing strip away from the connecting plate is pressed, the pressing strip rotates around the hinge shaft, the two groups of moving buckles are pulled close to each other through the connecting plate, so that the moving buckles are separated from the clamping restriction of the fixed buckle, at this time, the first spring pushes the lifting seat to rise, and through the lever linkage structure, the pressing action is converted into the opening and closing action of the moving buckle, so that the labor-saving and synchronization of the unlocking operation are realized, the cross design of the two groups of pressing strips ensures balanced stress, the unlocking response is rapid, and the operation convenience of the device is further improved, which adapts to the on-site rapid maintenance demand.

[0014] Further, the integration mechanism includes an insertion block inserted into the slot, two pairs of L-shaped clamping grooves are symmetrically arranged on the top and bottom of the front of the lifting seat, a rotating shaft is symmetrically arranged on the front of the insertion block, a disc is mounted on the outer side of the rotating shaft, a clamping plate is symmetrically mounted on the outer ring of the disc and matched with the L-shaped clamping groove, a handle is mounted on the outer side of the disc, and a baffle matched with the insertion block is symmetrically mounted on the top of the lower bin body near the outlet end of the slot.

[0015] Through the above technical scheme, the insertion block is used to bear the plug-in mechanism, after being inserted into the slot, the disc is rotated through the handle, the clamping plate on the outer ring of the disc is clamped into the L-shaped clamping groove on the lifting seat, the fixation of the insertion block is realized, the baffle in the lower bin body is blocked outside the insertion block, which can prevent the insertion block from being separated from the slot, and the plug-in mechanism and the L-shaped conductive sheet are accurately positioned. When the circuit is replaced, the disc is reversely rotated, the clamping plate is separated from the L-shaped clamping groove, the insertion block can be pulled out through the handle, the integration and fixation of multiple external lead wires are realized, and the quick switching is realized, the tedious operation of disassembling and assembling the single circuit is avoided, the positioning structure of the insertion block ensures the accurate butt joint with the L-shaped conductive sheet, the stability of the circuit connection is improved, and the cooperation design of the handle and the clamping plate enables the insertion block to be disassembled without tools, and the operation is efficient and convenient.

[0016] Further, the plug-in mechanism includes an internal thread groove, the internal thread groove is provided with three groups, and the three groups of internal thread grooves are uniformly distributed on the front of the insertion block, two groups of discs are respectively located between adjacent two groups of internal thread grooves, a circular table groove is formed at one end of the internal thread groove away from the disc, a first contact sheet is mounted on the inner wall of the circular table groove away from the disc, a power copper block matched with the L-shaped conductive sheet is mounted on the end of the first contact sheet away from the disc, and a fixing assembly is arranged in the internal thread of the internal thread groove.

[0017] By the technical scheme, the three groups of internal thread grooves are uniformly distributed on the insertion block and used for mounting and fixing the assembly, the first contact sheet in the internal thread groove is connected with the electrified contact end, the electrified contact end is matched with the L-shaped conductive sheet, when the fixed external lead wire is fixed, the stripped lead wire is inserted into the fixing assembly, the fixing assembly is screwed to be threadedly matched with the internal thread groove, the lead wire copper wire is pushed to be tightly attached to the first contact sheet, and meanwhile the lead wire is fixed by the wire clamping assembly, a conductive path is formed, tool-free fixing of the external lead wire is realized, the lead wire copper wire is tightly attached to the first contact sheet through thread matching and clamping of the contact sheet, the electrical connection stability is improved, and loosening or loose connection is avoided, the design of the three groups of internal thread grooves is matched with parallel connection of multiple groups of lines, and the wiring requirements of different external devices are met.

[0018] Further, the fixing assembly comprises an insertion pipe, the insertion pipe is threadedly arranged in the internal thread groove through external threads on the outer side of the insertion pipe, a head end of the insertion pipe is provided with a second contact sheet matched with the first contact sheet, and two groups of tail wing plates are arranged at the tail end of the outer side of the insertion pipe.

[0019] By the technical scheme, the insertion pipe is matched with the internal thread groove through external threads, the second contact sheet at the head end of the insertion pipe is matched with the first contact sheet, and the tail wing plates at the tail end are convenient for manual screwing, after the lead wire is inserted into the insertion pipe, the tail wing plates are manually rotated to push the insertion pipe along the internal thread groove, the second contact sheet and the first contact sheet jointly clamp the lead wire copper wire, mechanical fixing and conductive connection are realized, the lead wire is fastened without tools, the design of the tail wing plates is convenient for manual operation and is matched with narrow operation space, the clamping structure of the second contact sheet and the first contact sheet increases the contact area with the lead wire copper wire, reduces the contact resistance, reduces the risk of heating, and further improves the stability and reliability of the electrical connection.

[0020] Further, the wire clamping assembly comprises strip-shaped through grooves, four groups of the strip-shaped through grooves are uniformly distributed at the middle positions of the outer side of the insertion pipe, a plastic plate is arranged at one end of the strip-shaped through groove and close to the second contact sheet, and a wedge-shaped block is arranged at the outer side of the plastic plate.

[0021] By the technical scheme, the four groups of strip-shaped through grooves are distributed on the outer side of the insertion pipe, the plastic plate in the strip-shaped through groove is connected with the wedge-shaped block, when the insertion pipe is screwed into the internal thread groove, the inner wall of the internal thread groove extrudes the wedge-shaped block, forces the plastic plate to deform, and the inner side of the deformed plastic plate tightly abuts against the outer side of the lead wire, thereby forming auxiliary fixing, the lead wire is fixed again through deformation clamping, and double fixing effects are formed through clamping of the contact sheet, the loosening or falling of the lead wire caused by vibration or pulling is effectively prevented, the plastic plate is soft in material, can be matched with lead wires of different diameters, and will not damage the insulation layer of the lead wire, and the universality and safety of the fixing are improved.

[0022] Furthermore, the top of the lifting seat is equipped with two sets of partitions, and the two sets of partitions are located between two adjacent sets of L-shaped conductive sheets. The lifting seat is symmetrically equipped with pressure plates on both sides near the slot end.

[0023] Through the above technical solution, two sets of partitions are used to separate the conductive components of different groups to avoid short circuits. The lower pressure plates on both sides of the lifting seat make it easy to manually press down the lifting seat so that the moving buckle and the fixed buckle can be locked together.

[0024] The beneficial effects of the present invention are as follows: (1) The overvoltage protector of the protection mechanism of the present invention can actively cut off the circuit when the voltage is abnormal. The lifting seat of the fitting mechanism is driven by the first spring to realize the physical connection and disconnection between the L-shaped conductive sheet and the output contact end. The two form a double insurance of "active protection + physical switch", which is suitable for different scenarios such as overvoltage and maintenance, avoids the risk of single protection failure, and greatly improves the connection and disconnection stability of the instrument box and external equipment; (2) The present invention fixes multiple sets of external lead wires in a unified manner by integrating the insertion block of the mechanism. When a certain set of protection mechanisms or the corresponding instrument box line fails, When there is a problem, there is no need to disconnect the wires one by one. You only need to press down the locking and fitting mechanism, rotate the unlocking and integration mechanism, and pull out and replace the insertion block. The switching can be completed in three steps, which greatly shortens the operation time and avoids the confusion and damage of the wires, significantly improving the maintenance efficiency; (3) The insertion mechanism of the present invention is manually turned by the tail wing plate of the fixing component, so that the second contact piece and the first contact piece clamp the copper wire of the wire. At the same time, the wire clamping component deforms and presses against the wire, forming a double fixation. No tools are needed throughout the process, and it is resistant to pulling. It ensures the stability of the electrical connection and reduces the operation threshold, making it suitable for narrow or toolless scenarios. Attached Figure Description

[0025] Figure 1 This is a first-view structural diagram of the present invention; Figure 2 This is a second-view structural diagram of the present invention; Figure 3 This is a first-view structural diagram of the internal structure of the main body of the invention; Figure 4 This is a second-view structural diagram of the internal structure of the main body of the invention; Figure 5 This is a third-view structural diagram of the internal structure of the main body of the invention; Figure 6 This is a schematic diagram of the main compartment of the present invention; Figure 7 This is a first-view structural diagram of the insertion block slot of the present invention; Figure 8 This is a second-view structural diagram of the insertion block slot of the present invention; Figure 9 This is a schematic diagram showing the disassembled fitting mechanism, integration mechanism, and insertion mechanism of the present invention; Figure 10This is a bottom view of the lifting seat of the present invention; Figure 11 This is a cross-sectional schematic diagram of the insertion block of the present invention; Figure 12 This is a partial structural schematic diagram of the insertion mechanism of the present invention.

[0026] Reference numerals: 1. Power instrument box; 2. Main compartment; 201. Upper compartment; 202. Lower compartment; 3. Protection mechanism; 301. Overvoltage protector; 302. Contact end; 4. Fitting mechanism; 401. Slide rod; 402. Lifting seat; 403. First spring; 404. Slot; 405. L-shaped conductive sheet; 5. Self-locking mechanism; 501. Slide groove; 502. Slider; 503. Second spring; 504. Moving buckle; 505. Fixing buckle; 506. Unlocking component; 5061. Hinge shaft; 5062. Pressing strip; 5063. Connecting plate; 6. Whole 601. Insertion block; 602. Rotating shaft; 603. Disc; 604. Card plate; 605. L-shaped card slot; 606. Handle; 7. Insertion mechanism; 701. Internal thread groove; 702. Frustum groove; 703. First contact piece; 704. Powered copper block; 705. Fixing assembly; 7051. Insertion tube; 7052. External thread; 7053. Second contact piece; 7054. Tail wing plate; 706. Wire clamping assembly; 7061. Strip through groove; 7062. Plastic plate; 7063. Wedge block; 8. Baffle; 9. Lower pressure plate; 10. Partition. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0028] like Figures 1-10As shown, this embodiment of an external wiring device for a power meter box includes a power meter box 1 and a main compartment 2 installed on the door of the power meter box 1. The main compartment 2 consists of four upper compartments 201 and lower compartments 202, with the lower compartments 202 located directly below the upper compartments 201. The upper compartments 201 have a protection mechanism 3 connected to the power supply lines inside the power meter box 1. The lower compartments 202 have a fitting mechanism 4 that cooperates with the protection mechanism 3. The protection mechanism 3 includes an overvoltage protector 301 located inside the upper compartment 201. The input end of the overvoltage protector 301 is electrically connected to the power supply lines inside the power meter box 1 via a wire. The output end of the overvoltage protector 301 has a contact end 302, with the bottom end of the contact end 302 extending to the inner top of the lower compartment 202. The fitting mechanism 4 includes a lifting seat 402 located inside the lower compartment 202. Slide rods 401 are symmetrically installed at the four corners of the lifting seat 402, and the four sets of slide rods 401 pass through the four corners of the lifting seat 402 respectively. A first spring 403 is sleeved on the bottom of the outer side of the slide rod 401. The top of the first spring 403 is fixedly connected to the bottom of the lifting seat 402. A slot 404 is opened on the front of the lifting seat 402. An L-shaped conductive sheet 405 that cooperates with the contact end 302 is evenly installed at the top of the slot 404 away from the outlet of the slot 404. The bottom end of the L-shaped conductive sheet 405 extends into the slot 404 away from its outlet. Two sets of partitions 10 are installed on the top of the lifting seat 402, and the two sets of partitions 10 are located between two adjacent sets of L-shaped conductive sheets 405. Lower pressure plates 9 are symmetrically installed on both sides of the lifting seat 402 near the end of the slot 404. The lifting seat 402 slides along the slide rod 401 in the lower compartment 202. The first spring 403 provides an upward restoring force. The L-shaped conductive sheet 405 in the slot 404 of the lifting seat 402... The L-shaped conductive sheet 405 is adapted to the contact end 302. Under normal power supply, the self-locking mechanism 5 is unlocked, and the first spring 403 pushes the lifting seat 402 to rise. The L-shaped conductive sheet 405 fits with the contact end 302 to form a circuit. When power needs to be cut off, the lifting seat 402 is pressed down by the lower pressure plate 9, and the L-shaped conductive sheet 405 separates from the contact end 302. The overvoltage protector 301 provides overvoltage protection. The lifting seat 402 and the first spring 403 constitute a physical on / off switch, forming a double insurance to ensure stable on / off operation. The slide bar 401 ensures that the lifting seat 402 moves smoothly. The partition 10 prevents short circuits. The lower pressure plate 9 facilitates manual operation and adapts to the needs of parallel connection of multiple lines.

[0029] like Figures 5-10As shown, the bottom of the fitting mechanism 4 in this embodiment is provided with a self-locking mechanism 5. The self-locking mechanism 5 includes a fixing buckle 505. Two sets of fixing buckles 505 are provided, and the two sets of fixing buckles 505 are symmetrically installed at the middle position of both sides inside the lower compartment 202. A pair of sliding grooves 501 are symmetrically opened on both sides of the bottom of the lifting seat 402. A slider 502 is symmetrically arranged on the side of the two pairs of sliding grooves 501 that are far apart from each other. On the same side, the outer side of the two sets of sliders 502 are jointly installed with a movable buckle 504 that cooperates with the fixing buckle 505. A second spring 503 is symmetrically installed on the side of the two pairs of sliding grooves 501 that are close to each other. The end of the second spring 503 near the lifting seat 402 is fixedly connected to the slider 502. An unlocking component 506 that cooperates with the movable buckle 504 is provided at the middle position of the bottom of the lifting seat 402. The unlocking component 506 includes a hinge shaft 5061 located at the middle position of the bottom of the lifting seat 402. The middle position of the bottom of the lifting seat 402 is connected by the hinge shaft 5061. Two sets of pressing strips 5062 are arranged in a cross pattern. Connecting plates 5063 are symmetrically hinged to one end of each pressing strip 5062 near the slide groove 501. The end of the connecting plate 5063 away from the hinge axis 5061 is hinged to the middle position of the back of an adjacent set of movable buckles 504. A fixing buckle 505 is fixed to the inside of the lower compartment 202. When the lifting seat 402 is pressed down, the fixing buckle 505 presses against the movable buckle 504, causing the slider 502 to slide along the slide groove 501. The second spring 503 is compressed. When the movable... When the movable buckle 504 descends below the fixed buckle 505, the second spring 503 resets and pushes the movable buckle 504 to engage with the fixed buckle 505, locking the lifting seat 402. To unlock, press the pressing bar 5062, and the movable buckle 504 will be pulled closer through the hinge shaft 5061 and the connecting plate 5063 to release the engagement. This achieves reliable locking and quick unlocking of the lifting seat 402, preventing vibration from causing the lifting seat 402 to move erroneously, ensuring stability in the power-off state. The lever-type unlocking structure is labor-saving and convenient, improving operating efficiency.

[0030] like Figure 3 , Figure 9 and Figures 11-12As shown, the fitting mechanism 4 of this embodiment is internally provided with a plugging mechanism 7 for fixing the external lead wire end. The plugging mechanism 7 includes an internal thread groove 701, and three sets of internal thread grooves 701 are provided, and the three sets of internal thread grooves 701 are evenly distributed on the front side of the insertion block 601. Two sets of discs 603 are respectively located between two adjacent sets of internal thread grooves 701. A frustum groove 702 is opened at the end of the internal thread groove 701 away from the disc 603. The inner wall of the frustum groove 702 is away from the disc 603. One end of the plate is equipped with a first contact piece 703, and the end of the first contact piece 703 away from the disk 603 is equipped with a current-carrying copper block 704 that cooperates with the L-shaped conductive piece 405. The internal thread of the internal threaded groove 701 is provided with a fixing component 705, which includes an insertion tube 7051. The insertion tube 7051 is threaded into the internal threaded groove 701 through an external thread 7052 on the outside of the insertion tube 7051. The head end of the insertion tube 7051 is equipped with a contact piece 704 that cooperates with the first contact piece 405. The second contact piece 7053 is adapted to the insert piece 703. Two sets of tail fins 7054 are provided at the tail end of the outer side of the insertion tube 7051. A wire clamping assembly 706 is provided on the outer side of the insertion tube 7051. The wire clamping assembly 706 includes a strip-shaped through groove 7061. Four sets of strip-shaped through grooves 7061 are provided. The four sets of strip-shaped through grooves 7061 are evenly distributed in the middle position on the outer side of the insertion tube 7051. A plastic plate 7 is installed inside the strip-shaped through groove 7061 near one end of the second contact piece 7053. 062, and a wedge block 7063 is installed on the outer side of the plastic plate 7062. After the outer lead wire end is stripped, it is inserted into the insertion tube 7051. The tail fin plate 7054 is manually rotated, and the insertion tube 7051 is pushed along the inner thread groove 701 through the external thread 7052. The second contact piece 7053 and the first contact piece 703 clamp the copper wire. At the same time, the inner wall of the inner thread groove 701 squeezes the wedge block 7063, forcing the plastic plate 7062 to deform and press against the wire. The energized copper block 704 and the L-shaped conductive piece 405 are matched to achieve conductivity. The plastic plate 7062 and the wedge block 7063 help fix the wire. The double fixation prevents the wire from loosening, adapts to wires of different diameters, and improves the reliability and versatility of the connection.

[0031] like Figure 7 and Figures 9-11As shown, in this embodiment, the insertion mechanism 7 is disposed inside the fitting mechanism 4 via the integration mechanism 6. The integration mechanism 6 includes an insertion block 601 inserted into the slot 404. Two pairs of L-shaped slots 605 are symmetrically arranged on the top and bottom of the front of the lifting seat 402. A rotating shaft 602 is symmetrically arranged on the front of the insertion block 601, and a disc 603 is mounted on the outer side of the rotating shaft 602. A locking plate 604 that cooperates with the L-shaped slot 605 is symmetrically installed on the outer ring of the disc 603. A handle 606 is mounted on the outer side of the disc 603. A baffle 8 that cooperates with the insertion block 601 is symmetrically installed on the top of both sides of the lower compartment 202 near the outlet of the slot 404. The insertion block 601 carries the insertion mechanism 7. When inserted into the slot 404, the baffle 8 can prevent the insertion block 601 from disengaging from the slot 404. Rotating the handle 606 drives the disc 603 and the locking plate 604 to rotate, so that the locking plate 604 is engaged in the L-shaped slot 605. The L-shaped slot 605 secures the insertion block 601. When replacing the wiring, rotate the handle 606 in the opposite direction to disengage the card plate 604 from the L-shaped slot 605, and then pull out the insertion block 601. The insertion block 601 integrates multiple sets of external leads, enabling quick overall switching in case of faults without having to disconnect the wires one by one, greatly improving maintenance efficiency. The card plate 604 and the L-shaped slot 605 work together to ensure that the insertion block 601 is firmly fixed.

[0032] The working principle of this embodiment is as follows: First, the wire end of the external lead-in terminal is stripped and inserted into the insertion tube 7051 until the copper wire at the wire end protrudes from the top of the second contact piece 7053. Then, the exposed copper wire is placed against the outside of the second contact piece 7053. Next, the insertion tube 7051 is screwed into the internal thread groove 701, so that the outside of the second contact piece 7053 is pressed tightly against the inside of the first contact piece 703, clamping and fixing the copper wire. During the process, the inner wall of the internal thread groove 701 gradually squeezes the wedge block 7063, forcing the plastic plate 7062 to deform. One end of the deformed plastic plate 7062 abuts against the inside of the wedge block 7062. The wire is fixed to the outside, and then the insertion block 601 is fully inserted into the slot 404. At this time, the top of the energized copper block 704 is tightly pressed against the bottom of the L-shaped conductive sheet 405 at the corresponding position. Then, the disc 603 is rotated by the handle 606 to make the locking plate 604 lock into the L-shaped slot 605. Then, the head ends of the two sets of pressing strips 5062 (the end of the pressing strip 5062 away from the connecting plate 5063) are pressed, forcing the two sets of moving buckles 504 to move closer to each other, releasing the restriction of the moving buckles 504 and the fixing buckles 505 on the lifting seat 402. Then, the elastic potential energy of the first spring 403 pushes the lifting seat 402 up until the L-shaped... The top of the conductive piece 405 rests against the bottom of the contact end 302. At this time, the output end of the power instrument box is electrically connected to the wire head of the external lead-in terminal after passing through the overvoltage protector 301, contact end 302, L-shaped conductive piece 405, energized copper block 704 and first contact piece 703 in sequence. When a problem occurs in a certain group of lines in the power instrument box that are electrically connected to the external lead-in terminal, the lifting seat 402 corresponding to the problematic line and the lifting seat 402 corresponding to the replaceable line (without problem) are manually pressed down by the lowering plate 9, so that the contact end 302 is no longer in contact with the L-shaped conductive piece 405, until the moving buckle 504 stops. As the lifting seat 402 descends, the fixed buckle 505 forces the two sets of movable buckles 504 to move closer together. The slider 502 slides in the slide groove 501. The second spring 503 is compressed and stores elastic potential energy. When the movable buckle 504 descends below the fixed buckle 505, the two sets of movable buckles 504 return to their original positions. At this time, the movable buckle 504 and the fixed buckle 505 are engaged. Then, the disc 603 is rotated to make the card plate 604 leave the L-shaped card slot 605. Then, the insertion block 601 in the slot 404 corresponding to the problematic circuit is pulled out through the handle 606 and can be placed in the slot 404 corresponding to the replacement circuit.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. An electric power meter box external lead connecting device, comprising an electric power meter box body (1) and a main body bin (2) installed on the door of the electric power meter box body (1), characterized in that: The main body bin (2) is composed of four groups of upper bin body (201) and lower bin body (202), and the lower bin body (202) is located directly below the upper bin body (201); the inside of the upper bin body (201) is provided with a protection mechanism (3) connected with the internal power supply line of the electric power instrument box body (1), the inside of the lower bin body (202) is provided with a fitting mechanism (4) matched with the protection mechanism (3), and the bottom of the fitting mechanism (4) is provided with a self-locking mechanism (5); the inside of the fitting mechanism (4) is provided with a plug-in mechanism (7) for fixing the outer lead wire head, and the plug-in mechanism (7) is arranged in the inside of the fitting mechanism (4) through the integration mechanism (6).

2. The power meter box external lead-through device of claim 1, wherein, The protection mechanism (3) comprises an overvoltage protector (301), the overvoltage protector (301) is located in the inside of the upper bin body (201), the input end of the overvoltage protector (301) is electrically connected with the internal power supply line of the electric power instrument box body (1) through a wire, and the output end of the overvoltage protector (301) is provided with a contact end (302), and the bottom end of the contact end (302) extends to the inner top of the lower bin body (202).

3. The power meter box external lead-through device of claim 2, wherein, The fitting mechanism (4) comprises a lifting seat (402) located in the inside of the lower bin body (202), four corner positions in the inside of the lower bin body (202) are symmetrically provided with slide rods (401), and the four groups of slide rods (401) respectively pass through the four corners of the lifting seat (402), the bottom of the outer side of the slide rod (401) is sleeved with a first spring (403), the top end of the first spring (403) is fixedly connected with the bottom of the lifting seat (402), the front surface of the lifting seat (402) is provided with a slot (404), the top of the slot (404) is uniformly provided with an L-shaped conductive sheet (405) matched with the contact end (302) away from the outlet of the slot (404), and the bottom end of the L-shaped conductive sheet (405) extends to the end of the slot (404) away from the outlet thereof.

4. The power meter box external lead-through device of claim 3, wherein, The self-locking mechanism (5) comprises a fixed buckle (505), the fixed buckle (505) is provided with two groups, and the two groups of fixed buckles (505) are symmetrically installed at the middle positions of the two sides in the inside of the lower bin body (202), a pair of sliding grooves (501) are symmetrically arranged on the two sides of the bottom of the lifting seat (402), two pairs of sliding grooves (501) are symmetrically provided with sliding blocks (502) away from each other, the outer sides of the two groups of sliding blocks (502) on the same side are jointly provided with a moving buckle (504) matched with the fixed buckle (505), two pairs of sliding grooves (501) are symmetrically provided with second springs (503) close to each other, and one end of the second spring (503) close to the side of the lifting seat (402) is fixedly connected with the sliding block (502), and the middle position of the bottom of the lifting seat (402) is provided with an unlocking part (506) matched with the moving buckle (504).

5. The power meter box external lead-through device of claim 4, wherein, The unlocking component (506) comprises a hinged shaft (5061) located at the middle position of the bottom of the lifting seat (402), two groups of pressing strips (5062) are arranged at the middle position of the bottom of the lifting seat (402) and intersected by the hinged shaft (5061), the two groups of pressing strips (5062) are symmetrically hinged with connecting plates (5063) at one end close to the sliding groove (501), and the other end of the connecting plate (5063) away from the hinged shaft (5061) is hinged with the middle position of the back of the adjacent group of moving buckles (504).

6. The power meter box external lead-through device of claim 3, wherein, The integration mechanism (6) comprises an insertion block (601) inserted into the slot (404), two pairs of L-shaped clamping grooves (605) are symmetrically arranged at the top and bottom of the front of the lifting seat (402), a rotating shaft (602) is symmetrically arranged on the front of the insertion block (601), a disc (603) is mounted on the outer side of the rotating shaft (602), a clamping plate (604) matched with the L-shaped clamping groove (605) is symmetrically mounted on the outer ring of the disc (603), a handle (606) is mounted on the outer side of the disc (603), and a baffle (8) matched with the insertion block (601) is symmetrically mounted on the top of the lower cabinet (202) near the outlet end of the slot (404).

7. The power meter box external lead-through device of claim 6, wherein, The plug-in mechanism (7) comprises an internal thread groove (701), the internal thread groove (701) is provided with three groups, and the three groups of internal thread grooves (701) are uniformly distributed on the front of the insertion block (601), two groups of the disc (603) are respectively located between adjacent two groups of the internal thread grooves (701), a circular table groove (702) is formed at one end of the internal thread groove (701) away from the disc (603), a first contact sheet (703) is mounted on the inner wall of the circular table groove (702) away from the disc (603), a power copper block (704) matched with the L-shaped conductive sheet (405) is mounted on the end of the first contact sheet (703) away from the disc (603), and a fixing assembly (705) is arranged in the internal thread groove (701).

8. The power meter box external lead-through device of claim 7, wherein, The fixing assembly (705) comprises an insertion pipe (7051), the insertion pipe (7051) is arranged in the internal thread groove (701) through external threads (7052) on the outer side of the insertion pipe (7051), a second contact sheet (7053) matched with the first contact sheet (703) is mounted on the head end of the insertion pipe (7051), two groups of tail wing plates (7054) are arranged on the tail end of the outer side of the insertion pipe (7051), and a wire clamping assembly (706) is arranged on the outer side of the insertion pipe (7051).

9. The power meter box external lead-through device of claim 8, wherein, The wire clamping assembly (706) comprises a strip-shaped through groove (7061), the strip-shaped through groove (7061) is provided with four groups, the four groups of strip-shaped through grooves (7061) are uniformly distributed at the middle position of the outer side of the insertion pipe (7051), a plastic pasting plate (7062) is mounted on one end of the strip-shaped through groove (7061) close to the second contact sheet (7053), and a wedge-shaped block (7063) is mounted on the outer side of the plastic pasting plate (7062).

10. The power meter box external lead-through device of claim 3, wherein, The top of the lifting seat (402) is provided with two groups of partitions (10), and the two groups of partitions (10) are located between two adjacent groups of L-shaped conductive sheets (405). The lifting seat (402) is symmetrically provided with a pressing plate (9) at both sides near one end of the slot (404).

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