Opening and closing and on-off detection mechanism of intelligent electric meter and sampling element welding clamp

Abstract

A T plate of a floating pressing unit comprises a T-shaped open slot and a receding L opening, an opening and closing mechanism is arranged in the T-shaped open slot, a sliding tongue plate and a sliding rod in a cavity form a sliding pair, an elastic reset piece is arranged at the front end of the cavity, the sliding tongue plate is matched with a first pin, a driving source and the like, and the elastic reset piece is matched with a second pin. Welding risks can be prevented, and the power-on detection requirement of the welded electric meter is met; according to mutual inductor detection, an integral structure is constructed through a lower mounting plate, an opening and closing mechanism is mounted in a T-shaped opening groove, a sliding tongue plate is driven by a motor or an air cylinder to move so as to detect on-off and communication of a mutual inductor, and linkage of opening, closing and detection is achieved; the electric meter is novel in structure, welding quality is improved, detection is accurate, the structure is suitable for automation, various functions can be achieved, the performance of the electric meter is guaranteed in an all-around mode, reliability and safety are enhanced, and the conditions of electric power abnormity and electricity stealing are effectively handled.

Description

Technical Field

[0001] The invention relates to the field of equipment technology and on-off performance detection of smart meters, and in particular to an opening and closing and on-off detection mechanism of a smart meter and a sampling element welding fixture. Background Art

[0002] Smart meters are the basis for carbon, energy efficiency, electricity consumption and billing measurement in the context of dual carbon energy in a new type of power system. They are large in number and have a wide range of applications. Their reliability and accuracy are crucial to the safe operation of power grids and users, as well as economic and property interests.

[0003] 1. Smart meters include switch units (relays or load switches or other switches that control the closing and closing of switches), transformers, and copper bars of terminals. The switch units and copper bars of terminals, as well as the transformers and copper bars of terminals are all bare welded, which requires at least 2 sets of welding equipment and fixtures. There are many processes, long turnover cycles, low efficiency, and high costs. During the welding process of the switch unit, it is impossible to confirm whether the moving and static contacts inside the switch unit are connected or disconnected. When the moving and static contacts inside the switch unit are in the connected state, welding at this time has the following problems: (1) The welding current will form a shunt effect with the moving and static contacts, affecting the welding quality; (2) There is a risk of welding and melting of the moving and static contacts inside the switch unit. The large welding current will cause the contacts to overheat, accelerate the wear and oxidation of the contacts, and increase the contact resistance of the contacts, thereby affecting the normal operation of the switch. It may even cause the contacts to stick and be unable to disconnect, causing the switch mechanism to lose its effective control over the circuit. (3) Welding current that is too high and lasts too long may cause serious ablation and deformation of the contacts, destroying the normal opening and closing function between the contacts, causing the opening and closing mechanism to be unable to normally perform the circuit cutting operation. In addition, the strong electric force generated by the short circuit may also loosen some connecting parts, affecting the mechanical stability of the entire mechanism; (4) It is necessary to check for faults and hidden dangers in the opening and closing operations of smart meters caused by bumps and vibrations during production and transportation, wear caused by frequent operations, aging and deformation of mechanical parts, and intrusion and blockage of foreign objects.

[0004] 2. The smart meter is formed by welding resistance of the terminal, switch unit and transformer. The on-off performance test before and after welding, the actual measurement of live wire current and voltage of the switch unit in the smart meter, and the actual measurement of neutral wire current of the transformer are very important for billing and grid line fault judgment as sampling elements; the detection of whether the transformer and switch unit communication and current on-off performance are intact is prone to the following problems; (1) If the current on-off and communication are abnormal, it seriously affects the anti-stealing electricity monitoring: Under normal circumstances, the current in the live wire and the neutral wire are equal in magnitude and opposite in direction. If someone steals electricity, such as connecting an external wire to the live wire or the neutral wire, it will cause the imbalance between the zero and live wire currents. By measuring the currents of the two respectively, the smart meter can promptly detect this imbalance and determine whether there is electricity stealing behavior. The switch unit can trip and cut off the power accordingly to protect the interests of the power supply side; (2) If the current on-off and communication are abnormal, it seriously affects the fault detection and protection: When the imbalance between the zero and live wire currents is detected, in addition to electricity stealing, it may also be caused by faults such as line leakage. Timely detection of such faults can prevent safety accidents caused by leakage and ensure the safety of users and the power grid; (3) If the current on-off and communication are abnormal, it seriously affects the verification of metering accuracy: Measuring the current in the neutral wire and comparing it with the current in the live wire can verify the metering accuracy of the smart meter, ensure accurate metering, and provide a reliable basis for electricity bill settlement; (4) If the current on-off and communication are abnormal, the communication will be interfered by the fault.

[0005] In the opening and closing mechanism with remote control function, the stability of the communication link is crucial. If the communication module fails, or the communication network signal is poor (such as in a weak signal coverage area, affected by external signal interference, etc.), it will cause the remote control command to be unable to be transmitted to the opening and closing mechanism in a timely and accurate manner, making the remote opening and closing operation ineffective; at the same time, problems such as data loss and error in the communication process may also cause the mechanism to receive incorrect control commands, thereby triggering opening and closing failures. Summary of the Invention

[0006] Therefore, the technical problem to be solved by the present invention is how to ensure that the moving and static contacts inside the switch unit are in the open state before welding, and after welding is completed, when checking the metering performance of the smart meter and detecting system and smart meter faults, the opening and closing and communication functions of the smart meter can be realized intelligently and in a timely manner. For this purpose, an opening and closing and on-off detection mechanism for a smart meter includes: A floating pressing unit, the floating pressing unit includes a T plate, and the T plate is provided with a T-shaped opening groove and a relief L-shaped opening; An opening and closing mechanism, the opening and closing mechanism is accommodated in the T-shaped opening groove, the opening and closing mechanism is provided with a chamber, and the chamber is open at the front and rear; A sliding tongue plate, the number of the sliding tongue plates is two, the two sliding tongue plates are accommodated in the chamber, the two sliding tongue plates are symmetrically arranged, the front end of the sliding tongue plate extends to the outside of the front end of the chamber for cooperating with the first pin of the switch unit; the rear end of the sliding tongue plate extends to the outside of the rear end of the chamber, and the rear end of the sliding tongue plate cooperates with the driving source and the power supply line; A sliding rod, the sliding rod extends between the two sliding tongue plates to form a sliding pair; An elastic reset member, one end of which abuts against one of the sliding tongue plates, and the other end of which abuts against the other sliding tongue plate, and the elastic reset member is located at the front end of the chamber; In the first state, the sliding tongue plate moves toward the switch unit, and the front end of the sliding tongue plate cooperates with the first pin to form a disconnection effect of the switch unit; In the second state, the front end of the sliding tongue plate cooperates with the first pin to form a connection effect of the switch unit; and the sliding tongue plate moves away from the switch unit.

[0007] It also includes a positioning pin, the sliding tongue plate is provided with a first positioning hole, the positioning pin passes through the first positioning hole and is linked with the sliding tongue plate, and the first positioning hole is located at the rear end of the chamber.

[0008] The opening and closing mechanism includes a base and a multi-U-shaped groove plate. The base and the multi-U-shaped groove plate cooperate to form the chamber. The base is provided with a partition portion, and the partition portion is provided with a first waist-shaped hole. The elastic reset member passes through the first waist-shaped hole; the two sliding tongue plates are arranged on both sides of the partition portion.

[0009] The base is provided with a first I-shaped groove and a second I-shaped groove, the first I-shaped groove is connected with the second I-shaped groove, the sliding tongue plate passes through the first I-shaped groove and the second I-shaped groove and extends to the outside of the front end of the chamber, and the bottom surface of the first I-shaped groove is provided with a groove; the lower end of the positioning pin is provided with a convex point; the sliding tongue plate is provided with a second lower step, and the second lower step is provided with a step portion. In the initial position, the convex point cooperates with the groove, the sliding tongue plate slides, and the step portion abuts against the first I-shaped groove.

[0010] A fourth arc and an I-shaped step are provided at the front end of the sliding tongue plate, the fourth arc is connected to one end of the I-shaped step, and the other end of the I-shaped step extends obliquely toward the opposite front end of the sliding tongue plate.

[0011] The T-plate includes an upper mounting plate and a lower mounting plate, the upper mounting plate slides relative to the lower mounting plate, the T-shaped opening groove and the yielding L-shaped port are arranged on the upper mounting plate; the lower mounting plate is connected with an L-shaped plate, and the L-shaped plate fixes the second pin of the transformer; when the switch unit detection is completed, the upper mounting plate drives the opening and closing mechanism to move to one side of the transformer, and the opening and closing mechanism detects the transformer.

[0012] Therefore, the technical problem to be solved by the present invention is how to ensure that the moving and static contacts inside the switch unit are in the open state before welding, and after welding is completed, when the closing and detecting the metering performance of the smart meter, and detecting system and smart meter faults, the opening and closing and communication functions of the smart meter can be intelligently realized in a timely manner. For this purpose, a welding fixture for sampling components includes: A bottom plate, the bottom plate is provided with a first concave cavity and a first fixing cavity, and the first fixing cavity is used for fixing the terminal box unit; A sixth connecting plate, the sixth connecting plate is accommodated in the first concave cavity, and the sixth connecting plate slides relative to the first concave cavity; the sixth connecting plate is provided with a second fixing cavity, and the second fixing cavity is used for fixing the switch unit; A clamping unit, the clamping unit is slidably connected to the sixth connecting plate, and the clamping unit is provided with a third fixing cavity, and the third fixing cavity is used for fixing the mutual inductor; A first driving mechanism; the first driving mechanism is linked with the sixth connecting plate, and the first driving mechanism drives the sixth connecting plate to reciprocate toward the side of the first fixing cavity; A fourth driving mechanism; the fourth driving mechanism is linked with the clamping unit, and the fourth driving mechanism drives the clamping unit to reciprocate toward the side of the first fixing cavity; A first pressing mechanism; the first pressing mechanism is used for fixing the terminal box unit; The above-mentioned opening and closing and on-off detecting mechanism of the smart meter, the opening and closing mechanism is located at the rear end of the second fixing cavity; The terminal box unit is fixed with a switch unit copper terminal and a mutual inductor copper terminal, the switch unit is fixed with a second conductive member, the mutual inductor is fixed with a third conductive member, and both the second conductive member and the third conductive member are fixed with welding pads; the second conductive member is welded to the switch unit copper terminal; the third conductive member is welded to the mutual inductor copper terminal.

[0013] The bottom plate is provided with a chute, the chute is provided with a first horizontal groove and a first inclined groove, the first horizontal groove is communicated with the first inclined groove, and the sixth connecting plate is provided with a first protrusion, and the first protrusion slides in the chute.

[0014] It further includes a positioning frame and a return spring. The positioning frame is provided with a first U-shaped groove and a first fixing post. On both sides of the front arm of the first U-shaped groove, a double-sided L-shaped first stepped opening groove and a second stepped opening groove are symmetrically arranged. The first stepped opening groove and the second stepped opening groove are used for positioning and supporting the third conductive member. The bottom surface of the positioning frame is provided with a 7-shaped stepped surface; the sixth connecting plate is provided with a first opening groove and a second opening groove. A linear ball guide is installed between one side surface of the positioning frame and the first opening groove, and a linear ball guide is installed between the other side surface of the positioning frame and the first opening groove; the positioning frame slides relative to the sixth connecting plate, and the clamping unit is fixed on the positioning frame; the bottom plate is provided with a second fixing post. One end of the return spring cooperates with the first fixing post, and the other end of the return spring cooperates with the second fixing post.

[0015] The number of the first U-shaped grooves is one or two or three, and each first U-shaped groove is correspondingly fixed with one clamping unit.

[0016] It further includes a tenth connecting plate. The tenth connecting plate is connected to the bottom plate. The tenth connecting plate is provided with a support plate. The support plate is provided with a buffer spring hole, and a spring is accommodated in the buffer spring hole. The other end of the spring abuts against the clamping unit.

[0017] A first sliding pair is provided between the side wall of the first cavity and the sixth connecting plate.

[0018] The clamping unit includes a fixed claw and a rotating claw. One end of the rotating claw rotates relative to the fixed claw, and the other end of the rotating claw cooperates with the fixed claw to form the third fixed cavity; a pressing spring is provided between the fixed claw and the rotating claw. The fixed claw is provided with an inner arc, and the rotating claw is provided with a first L-shaped stepped groove, a first arc, a second arc, and a third arc, which are connected in sequence.

[0019] The first pressing mechanism includes a first pressing member, and the first pressing member rotates horizontally and moves vertically up and down relative to the bottom plate.

[0020] One end of the sixth connecting plate facing the first fixed cavity is provided with a floating pressure limiting unit, and the end of the sixth connecting plate away from the first fixed cavity is provided with a switching mechanism.

[0021] The floating pressure limiting unit includes a 7-shaped clamping plate. The 7-shaped clamping plate is connected to one end of the sixth connecting plate close to the first fixed cavity. The 7-shaped clamping plate is provided with a second U-shaped groove and a third U-shaped groove. The second U-shaped groove and the third U-shaped groove are both provided with floating jacking components, and the floating jacking components are a combination of a spring and a T-shaped sliding column.

[0022] The first fixed cavity is provided with an intermediate groove, a first relief groove and a front groove. The intermediate groove, the first relief groove and the front groove are communicated. Through holes are provided at both ends of the front groove, and L-shaped sliding plates are fixed to the through holes.

[0023] It further includes a second driving mechanism and a buffer mechanism. The second driving mechanism drives the bottom plate to move along a first direction. The buffer mechanism is matched with the bottom plate, and the buffer mechanism is adjustable.

[0024] It further includes a third driving mechanism and a fifth driving mechanism. The third driving mechanism drives the bottom plate to move along a second direction, and the fifth driving mechanism drives the bottom plate to move along a third direction. The first direction, the second direction and the third direction are perpendicular to each other in pairs.

[0025] It further includes a first connecting plate, a second connecting plate, a third connecting plate, a fourth connecting plate and a seventh connecting plate. The third driving mechanism drives the first connecting plate to move; the fifth driving mechanism is arranged above the first connecting plate, and the fifth driving mechanism drives the second connecting plate to be connected. The third connecting plate is vertically connected to the second connecting plate, the fourth connecting plate is arranged parallel to the second connecting plate, the fourth connecting plate is vertically connected to the third connecting plate, the seventh connecting plate is vertically connected to the bottom plate, and the seventh connecting plate is respectively connected to the third connecting plate and the second connecting plate.

[0026] The technical solution of the present invention has the following advantages: 1. For the opening / closing and on / off detection mechanism of the intelligent electric meter provided by the present invention, the opening / closing mechanism is to prevent the moving and static contacts inside the switch unit from still being in a connected state. During the welding process, if the moving and static contacts inside the switch unit are in a connected state and welding is carried out at this time, the large welding current will cause the adhesion and melting of the moving and static contacts of the switch unit, resulting in jamming of the mechanism, non-power-on of the mutual inductor, etc., and the functions of remote opening / closing and electricity charge control for low-voltage users cannot be realized; moreover, a shunt will be formed during the welding process, resulting in the generation of false soldering and affecting the welding quality; with the above structure, in the first state (the switch unit is disconnected), the risks of welding shunt false soldering and welding and melting the moving and static contacts of the switch unit are eliminated; in the second state (the switch unit is connected), after welding, the closing of the switch unit realizes the requirements of detecting the resistance of the intelligent electric meter during welding and the performance of the electric meter; through the opening / closing mechanism, it is ensured that the moving and static contacts inside the switch unit are in a disconnected state, thereby improving the stability and welding quality of subsequent welding.

[0027] 2. The opening / closing and on / off detection mechanism of the smart meter provided by the present invention. The positioning pin forms a fixing effect on the sliding tongue plate. When the front end of the sliding tongue plate cooperates with the first pin, the elastic resetting member will be compressed and tightened. At this time, the rear end of the sliding tongue plate will form a rotating effect around the positioning pin. At the same time, the tension of the elastic resetting member will drive the front end of the sliding tongue plate to move outward, so that the sliding tongue plate can better cooperate with the first pin.

[0028] 3. The opening / closing and on / off detection mechanism of the smart meter provided by the present invention. The left-right separation setting prevents creepage between the two sliding tongue plates. Moreover, through the setting of the first waist-shaped hole, the sliding effect of the elastic resetting member is better realized. It should be noted here that the elastic resetting member will not electrically connect the two sliding tongue plates, that is, there will be no short-circuit phenomenon between the two sliding tongue plates. When the elastic resetting member is a compression spring, an insulating pad or insulating sleeve can be installed at the cooperation position between the elastic resetting member and the sliding tongue plate to form an insulating effect; in addition, an insulating separation can also be formed by an elastic resetting member with an insulating material on its outer surface, such as a rainbow ring structure.

[0029] 4. The opening / closing and on / off detection mechanism of the smart meter provided by the present invention. In the initial position, the convex point and the concave groove are in contact and cooperate to form a limiting effect. When moving to the position where the step portion abuts against the first I-shaped groove, the sliding tongue plate cannot continue to move forward at this time, so as to achieve the effect of limiting and fixing and prevent the sliding tongue plate from moving excessively.

[0030] 5. The opening / closing and on / off detection mechanism of the smart meter provided by the present invention. The fourth arc cooperates with the U-shaped step to form a contact area with the first pin, so as to better realize the effect of electrical connection. Moreover, under the action of the elastic resetting member, the electrical connection is made more stable.

[0031] 6. The opening / closing and on / off detection mechanism of the smart meter provided by the present invention. Multifunctional integration: It can realize various functions such as the opening / closing action of the switch unit, the monitoring of the lower end for anti-stealing electricity, the fault detection and protection, and the metering accuracy verification. It can comprehensively detect and guarantee the relevant performance of the smart meter, improve the overall reliability and safety of the meter, and effectively prevent power anomalies and stealing electricity behaviors.

[0032] 7. The opening / closing and on / off detection mechanism of the smart meter provided by the present invention. Precise on / off detection: Through a specific mechanical structure design, such as the combination of an installation plate, a U-shaped sliding plate, an upper installation plate, etc., and the movement of the sliding tongue plate driven by a motor or a cylinder on the trapezoidal sliding pair, it can accurately switch between the first pin and the second pin, realize the accurate detection of the on / off and communication of the switch unit and the current transformer, ensure the normal signal transmission, and improve the accuracy of the meter metering and control.

[0033] 8. The opening / closing and on / off detection mechanism of the smart meter provided by the present invention has a flexible and stable structure: The installation unit structure formed by the lower mounting plate and the upper mounting plate, etc., not only ensures the stable installation of each component and the relative position relationship, but also realizes flexible movement operation through designs such as trapezoidal sliding pairs, facilitating the completion of different detection tasks in a limited space. Moreover, the opening / closing mechanism remains in the original position of the T plate, reducing the major modification to the original structure and being conducive to implementation and maintenance.

[0034] 9. The opening / closing and on / off detection mechanism of the smart meter provided by the present invention has a high degree of automation: The movement of the upper mounting plate and the tongue plate is realized by using a driving motor or a cylinder, and the detection process can be automatically completed according to a preset program, reducing manual intervention, improving the detection efficiency and consistency, reducing labor costs and human errors, and meeting the detection requirements of large-scale meter production.

[0035] 10. The sampling element welding fixture provided by the present invention is configured in this way. First, the switch unit and the mutual inductor move relative to the terminal box unit, making the cooperation between the switch unit, the mutual inductor and the terminal box unit more stable. Moreover, the combined fixing method of the three components forms an automated processing and welding, which can avoid the faults caused by manual operation. The setting of the welding piece improves the welding quality during the welding process.

[0036] 11. In the sampling element welding fixture provided by the present invention, since the contact surfaces of the switch unit and the terminal box unit and the contact surfaces of the mutual inductor and the terminal box unit are not at the same horizontal height, the first driving mechanism drives the sixth connecting plate to move. When the first protrusion cooperates with the first inclined groove, an action of pressing downward obliquely is formed, enabling the welding cooperation between the switch unit and the terminal box unit and between the mutual inductor and the terminal box unit.

[0037] 12. The sampling element welding fixture provided by the present invention, this design of the return spring tension + moving pair mainly aims at the problems that in the prior art, the positioning clamping and welding of the third conductive part on the mutual inductor cannot be separated, and the positioning frame is prone to poor welding during the welding process with the copper terminal of the mutual inductor and the third conductive part. Through the movement of the positioning frame, a relative movement effect can be formed.

[0038] 13. In the sampling element welding fixture provided by the present invention, one clamping unit is correspondingly fixed to each first U-shaped groove, and one clamping unit corresponds to one mutual inductor. When the meter is single-phase, the number of first U-shaped grooves is one; when the meter is two-phase, the number of first U-shaped grooves is two; when the meter is three-phase, the number of first U-shaped grooves is three.

[0039] 14. The sampling element welding fixture provided by the present invention. The buffer spring hole is used for the first protrusion to slide along the first inclined groove. The spring buffer rotates and jacks up the clamping unit, preventing overvoltage between the switch unit and the copper terminal of the switch unit, and between the mutual inductor and the copper terminal of the mutual inductor, which may cause cracking and excessive extrusion of the solder, resulting in excessive overflow of the solder and insufficient brazing weld.

[0040] 15. The sampling element welding fixture provided by the present invention. The setting of the first sliding pair improves the sliding effect between the sixth connecting plate and the bottom plate.

[0041] 16. The sampling element welding fixture provided by the present invention. The clamping unit forms the clamping and fixing of the mutual inductor. Since the main part of the mutual inductor is annular, the clamping and fixing is formed through the clamping mechanism. Secondly, when the welding is completed, at this time, the terminal box unit, the switch unit, and the mutual inductor form an integral structure. By rotating the rotating claw, the whole can be taken out for the next detection operation, and the operation is highly convenient. Moreover, this structural setting forms the fixing effect for different mutual inductors, and this clamping unit can be applied to the mutual inductors of Southern Power Grid and State Grid.

[0042] 17. The sampling element welding fixture provided by the present invention. The first pressing member is used to fix the terminal box unit to prevent the terminal box unit from shaking during the welding process. In the initial state, the first pressing member rotates to the outside of the first fixing cavity, so that the terminal box unit can be placed into the first fixing cavity. When the terminal box unit, the switch unit, and the mutual inductor are placed, the first pressing member will rotate above the terminal box unit and move towards the terminal box unit until it abuts against the terminal box unit to form a fixing effect.

[0043] 18. The sampling element welding fixture provided by the present invention. The floating pressure limiting unit gives a reverse force to the second conductive member, preventing overvoltage between the switch unit and the copper terminal of the switch unit, and between the mutual inductor and the copper terminal of the mutual inductor, which may cause cracking and excessive extrusion of the solder, resulting in excessive overflow of the solder and insufficient brazing weld; the support structure of the front slot terminal box unit forms a support and limiting effect.

[0044] 19. The sampling element welding fixture provided by the present invention. The setting of the buffer mechanism forms a protection effect for the lower electrode, preventing the lower electrode from being fractured during use.

[0045] 20. The sampling element welding fixture provided by the present invention. The second driving mechanism, the third driving mechanism, and the fifth driving mechanism form driving effects in different directions, that is, form sliding effects in the X-axis, Y-axis, and Z-axis directions.

[0046] 21. The sampling element welding fixture provided by the present invention. Through the cooperation between multiple connecting plates, a certain connection strength is formed to meet the movement in different directions. Description of the Drawings

[0047] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0048] Figure 1 Structural schematic diagram of the opening / closing and on / off detection mechanism of the intelligent electric meter provided by the present invention; Figure 2 Exploded view of the terminal box unit, switch unit, and current transformer provided by the present invention; Figure 3 Structural schematic diagram of the sampling element welding fixture provided by the present invention; Figure 4 Exploded schematic diagram of the sampling element welding fixture provided by the present invention; Figure 5 Another form of the structural schematic diagram of the opening / closing and on / off detection mechanism of the intelligent electric meter provided by the present invention; Figure 6 Structural schematic diagram of the cooperation between the fixed claw and the rotating claw provided by the present invention; Figure 7 Schematic diagram of the cooperation between the fixed claw, rotating claw and the Southern Power Grid current transformer provided by the present invention; Figure 8 Schematic diagram of the cooperation between the fixed claw, rotating claw and the State Grid current transformer provided by the present invention; Figure 9 Structural schematic diagram of the positioning frame in the two-phase electric meter provided by the present invention; Figure 10 Structural schematic diagram of the sixth connecting plate in the two-phase electric meter provided by the present invention; Figure 11 Structural schematic diagram of the positioning frame in the three-phase electric meter provided by the present invention; Figure 12 Structural schematic diagram of the sixth connecting plate in the three-phase electric meter provided by the present invention.

[0049] Explanation of the reference numerals: 11. Base plate; 12. First pressing mechanism; 14. First driving mechanism; 15. Terminal box unit; 16. Switch unit; 17. Current transformer; 25. Fixed claw; 26. Rotating claw; 29. Second driving mechanism; 30. Buffer mechanism; 31. First side plate; 32. Second side plate; 33. First sliding pair; 40. Third driving mechanism; 41. Fifth driving mechanism; 105. Second fixing column; 111. Sixth connecting plate; 112. Chute; 113. First concave cavity; 114. First fixing cavity; 115. Bump; 120. Return spring; 121. First pressing part; 124. Tenth connecting plate; 125. Outer arc; 128. First arc; 129. Second arc; 131. Second fixing cavity; 132. Third fixing cavity; 133. Through hole; 151. Copper terminal of switch unit; 152. Copper terminal of current transformer; 161. Second conductive part; 162. First pin; 171. Third conductive part; 237. T plate; 238. U-shaped slide plate; 239. Floating pressure limiting unit; 241. Support plate; 243. 7-shaped clamping plate; 244. Second U-shaped groove; 246. Third U-shaped groove; 247. Second relief groove; 245. First through-hole groove; 248. Second through-hole groove; 249. Relief L port; 250. T-shaped opening groove; 251. Card slot; 253. Eighth U-shaped groove; 254. Second waist-shaped hole; 256. First protrusion; 258. Inner arc; 260. Rotating shaft; 261. First L-shaped step groove; 264. Multi-U-shaped groove plate; 265. Slide tongue plate; 267. Slide bar; 268. Positioning pin; 269. Motor connection hole; 270. Power cord connection hole; 271. First lower step; 273. Fourth U-shaped groove; 274. Second lower step; 276. Third lower step; 277. L groove; 278. Fourth arc; 279. U-shaped step; 281. Groove; 282. First I-shaped groove; 283. Second I-shaped groove; 284. Through hole; 272. First positioning hole; 285. Second positioning hole; 287. Square groove; 291. Base; 292. First waist-shaped hole; 293. Counterbore; 295. Fifth U-shaped groove; 294. Sixth U-shaped groove; 296. Seventh U-shaped groove; 297. L-shaped relief groove; 300. Partition part; 301. Step part; 302. Step surface; 310. L-shaped plate; 311. Installation screw hole; 312. Lower mounting plate; 313. Upper mounting plate; 314. Screw hole; 315. Trapezoidal sliding pair; 316. Lower plate mounting hole; 317. Second pin; 1121. First horizontal groove; 1122. First inclined groove; A20. First connecting plate; A21. Second moving pair; A22. Second connecting plate; A23. Third connecting plate; A25. Fourth connecting plate; A29. Fourth driving mechanism; A33. Seventh connecting plate; A32. Fifth connecting plate; A35. Installation groove; A105. First fixing column; A118. Second opening groove; A119. Positioning frame; A120. First step opening groove; A123. 7-shaped step surface;A124, Second step opening groove; A127, Third arc; A129, First protruding end arc; A255, First opening groove; A126, Third opening groove; A132, Intermediate groove; A134, Front groove; A136, First relief groove; A257, First U-shaped groove; A1291, Second protruding end arc.; Detailed implementation mode

[0050] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0051] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0052] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0053] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0054] Embodiment 1 This embodiment provides a switching on / off and on / off detection mechanism for an intelligent electric meter, as shown in the attached Figures 1 - 4 figure, including: Floating pressing unit. The floating pressing unit includes a T-plate 237. The T-plate 237 is provided with a T-shaped opening groove 250 and a relief L-shaped opening 249. The relief L-shaped opening 249 is used for the relief of the positioning frame A119. Here, the relief L-shaped opening 249 is located at the lower right of the T-plate 237. The T-shaped opening groove 250 is used for clamping and fixing the opening and closing mechanism. Here, the T-shaped opening groove 250 is located at the upper right of the T-plate 237. However, it should be noted that the T-shaped opening groove 250 and the relief L-shaped opening 249 are not connected. In this embodiment, the T-shaped opening groove 250 is arranged in an inverted T shape, that is, the lower part is large and the upper end is small, forming a one-way sliding effect.

[0055] Opening and closing mechanism. The opening and closing mechanism is accommodated in the T-shaped opening groove 250. Here, the opening and closing mechanism can move back and forth relative to the T-plate 237. The back-and-forth movement here is used to adjust the position of the opening and closing mechanism. After the adjustment is completed, the opening and closing mechanism is fixed through a fixing structure. The opening and closing mechanism is provided with a chamber, and the chamber is open at the front and back. In this embodiment, the end of the chamber close to the switch unit 16 is the front end of the chamber, and the end far from the switch unit 16 is the rear end of the chamber.

[0056] Sliding tongue plates 265. The number of sliding tongue plates 265 is two. The two sliding tongue plates 265 are accommodated in the chamber. The two sliding tongue plates 265 are symmetrically arranged. The front ends of the sliding tongue plates 265 extend to the outside of the front end of the chamber and are used to cooperate with the first pins 162 of the switch unit 16. Here, the number of the first pins 162 is two. The two first pins 162 are the communication pins of the switch unit 16. By controlling the communication pins, the connection or disconnection of the moving and static contacts inside the switch unit 16 can be formed. The switch unit 16 can be a relay, a load switch or other switching control switches. The front ends of the two sliding tongue plates 265 are respectively electrically connected to the corresponding first pins 162 to form a control effect. The rear ends of the sliding tongue plates 265 extend to the outside of the rear end of the chamber. The other ends of the sliding tongue plates 265 are matched with the drive source and the power line. Here, the drive source drives the sliding tongue plates 265 to move along the Y-axis direction, so that the front ends of the sliding tongue plates 265 form an electrical connection effect with the first pins 162. The power line is electrically connected to the sliding tongue plates 265. An electrical connection effect is formed through the power line and the first pins 162, and then the control on-off effect is realized. Here, the sliding tongue plates 265 are specifically made of conductive materials. In this embodiment, the end of the sliding tongue plate 265 close to the switch unit 16 is the front end of the sliding tongue plate 265, and the end of the sliding tongue plate 265 far from the switch unit 16 is the rear end of the sliding tongue plate 265.

[0057] Slide rod 267. The slide rod 267 extends between the two sliding tongue plates 265 to form a sliding pair. The slide rod 267 forms a separating effect between the two sliding tongue plates 265. Moreover, the sliding tongue plates 265 slide relative to the slide rod 267.

[0058] The elastic resetting member has one end abutted against one of the sliding tongue plates 265 and the other end abutted against the other sliding tongue plate 265. The elastic resetting member is located at the front end of the chamber and forms an effect of opening or tightening the front end of the sliding tongue plate 265.

[0059] In the first state, the sliding tongue plate 265 moves towards the switch unit 16, and the front end of the sliding tongue plate 265 cooperates with the first pin 162 to form a disconnection effect of the switch unit 16. Here, the first state is to control the switch unit 16 to disconnect, forming an opening effect. Specifically, the control end gives a power-off signal to the power line to control the disconnection of the moving and static contacts inside the switch unit 16. When the switch unit 16 is opened, an electrical connection effect between the switch unit 16 and the terminal box unit 15 is formed through resistance brazing. When the welding is completed, that is, the second state, at this time, the sliding tongue plate 265 and the first pin 162 are still in an electrical connection relationship, and the front end of the sliding tongue plate 265 cooperates with the first pin 162 to form a connection effect of the switch unit 16. Here, specifically, the control end gives a power-on signal to the power line to control the connection of the moving and static contacts inside the switch unit 16. When the switch unit 16 is in the closed state, the sliding tongue plate 265 moves away from the switch unit 16. In the second state, the closing and opening detection is used to measure the performance of the intelligent electricity meter. Also, when simulating the system and the intelligent electricity meter failure, the closing and opening and communication function performance of the intelligent electricity meter can be detected.

[0060] The closing and opening mechanism is to prevent the moving and static contacts inside the switch unit 16 from being in a connected state. During the welding process, if the moving and static contacts inside the switch unit 16 are in a connected state and welding is performed at this time, the large welding current will cause the adhesion and melting of the moving and static contacts of the switch unit 16, resulting in the jamming of the mechanism, the non-power-on of the current transformer 17, etc., and the inability to realize the remote closing and opening and electricity charge control functions for low-voltage users; moreover, a shunt will be formed during the welding process, leading to the generation of virtual soldering and affecting the welding quality; adopting the above structure, in the first state (the switch unit 16 is disconnected), the risks of welding shunt virtual soldering and welding and melting the moving and static contacts of the switch unit 16 are eliminated; in the second state (the switch unit 16 is connected), the closing of the switch unit 16 after welding meets the requirements of detecting the resistance and the performance of the electricity meter during the welding and energization of the intelligent electricity meter; through the closing and opening mechanism, it is ensured that the moving and static contacts inside the switch unit 16 are in a disconnected state, thereby improving the stability and welding quality of the subsequent welding.

[0061] Specifically, as shown in the appendix Figure 1As shown, it further includes a positioning pin 268. The sliding tongue plate 265 is provided with a first positioning hole 272. The positioning pin 268 passes through the first positioning hole 272 and is linked with the sliding tongue plate 265. Here, the positioning pin 268 penetrates the sliding tongue plate 265 along the Z-axis direction to form a linkage effect with the sliding tongue plate 265. The first positioning hole 272 is located at the rear end of the chamber. The positioning pin 268 forms a fixing effect on the sliding tongue plate 265. When the front end of the sliding tongue plate 265 cooperates with the first pin 162, the elastic reset member will be compressed and tightened. At this time, the rear end of the sliding tongue plate 265 will form a rotating effect around the positioning pin 268. At the same time, the tension of the elastic reset member will drive the front end of the sliding tongue plate 265 to move outward, so that the sliding tongue plate 265 and the first pin 162 are better matched. In addition, a plurality of elastic reset members can also be arranged between the two sliding tongue plates 265. However, the problem with this setting is that it is not convenient to install and the stability is insufficient. Through the structural setting of the positioning pin 268, positioning at one end after movement is formed, and a tightening or loosening effect is formed at the other end. The structure is ingenious, and the electrical connection between the sliding tongue plate 265 and the first pin 162 is better realized.

[0062] Specifically, as shown in the appendix Figure 1 As shown, the opening and closing mechanism includes a base 291 and a multi-U-shaped groove plate 264. The base 291 and the multi-U-shaped groove plate 264 cooperate to form a chamber. The base 291 is provided with a partition portion 300. The partition portion 300 is provided with a first waist-shaped hole 292. The elastic reset member passes through the first waist-shaped hole 292 and slides in the first waist-shaped hole 292. That is, one end of the elastic reset member abuts against one of the sliding tongue plates 265, and the other end of the elastic reset member passes through the first waist-shaped hole 292 and abuts against the other sliding tongue plate 265. The two sliding tongue plates 265 are respectively arranged on both sides of the partition portion 300. The left-right separation setting prevents creepage between the two sliding tongue plates 265. Moreover, through the setting of the first waist-shaped hole 292, the sliding effect of the elastic reset member is better realized. Here, it should be noted that the elastic reset member does not electrically connect the two sliding tongue plates 265, that is, there will be no short-circuit phenomenon between the two sliding tongue plates 265. Here, when the elastic reset member is a compression spring, an insulating pad or insulating sleeve can be installed at the position where the elastic reset member cooperates with the sliding tongue plate 265 to form an insulating effect; in addition, an insulating separation can also be formed by an elastic reset member with an insulating outer surface, such as a rainbow ring structure.

[0063] Specifically, as shown in the appendix Figure 1As shown, the base 291 is provided with a first I-shaped groove 282 and a second I-shaped groove 283. The number of the first I-shaped groove 282 and the second I-shaped groove 283 is two each, and they are in pairs. The first I-shaped groove 282 and the second I-shaped groove 283 communicate with each other to form a group, and the two groups of structures are arranged on both sides of the partition part 300. The sliding tongue plate 265 passes through the first I-shaped groove 282 and the second I-shaped groove 283 and extends to the outside of the front end of the chamber. The bottom surface of the first I-shaped groove 282 is provided with a groove 281; the lower end of the positioning pin 268 is provided with a bump, and the bump here is semicircular; the sliding tongue plate 265 is provided with a second lower step 274, and the second lower step 274 is provided with a step portion 301. In the initial position, the bump cooperates with the groove 281, and when the sliding tongue plate 265 slides, the step portion 301 abuts against the first I-shaped groove. In the initial position, the bump abuts against and cooperates with the groove 281 to form a limiting effect. When moving to the position where the step portion 301 abuts against the first I-shaped groove, at this time, the sliding tongue plate 265 cannot continue to move forward, thereby realizing the effect of limiting and fixing and preventing the sliding tongue plate 265 from moving excessively. Further, a second positioning hole 285 is provided on the base 291. In the initial position, the positioning pin 268 passes through the first positioning hole 272 and the second positioning hole 285 and cooperates with the groove 281. Here, the second positioning hole 285 is a semi-circular hole, and its side wall is provided with a notch, and the positioning pin 268 can move to the outside of the second positioning hole 285.

[0064] Specifically, as shown in the appendix Figure 1 As shown, the front end of the sliding tongue plate 265 is provided with a fourth arc 278 and a zigzag step 279. The fourth arc 278 is connected to one end of the zigzag step 279, and the other end of the zigzag step 279 extends obliquely towards the front end of the opposite sliding tongue plate 265. The fourth arc 278 and the zigzag step 279 cooperate to form an abutting area with the first pin 162, better realizing the effect of electrical connection, and under the action of the elastic reset member, making the electrical connection more stable.

[0065] Specifically, as shown in the appendix Figure 1As shown, the sliding tongue plate 265 is successively provided with a first lower step 271, a second lower step 274, and a third lower step 276 that are connected in sequence. The second lower step 274 connects the first lower step 271 and the third lower step 276. The first lower step 271 is located at the rear end of the sliding tongue plate 265, and the first lower step 271 is provided with a motor connection hole 269 that cooperates with the drive source and a power cord connection hole 270 that cooperates with the power cord. At the connection between the second lower step 274 and the first lower step 271, there is a first positioning hole 272 that cooperates with the positioning pin 268 and a step portion 301. On the side of the second lower step 274, there is a fourth U-shaped groove 273, and the step portion 301 is located on the side wall of the fourth U-shaped groove 273. At one end of the second lower step 274 close to the third lower step 276, there is an L-shaped groove 277, a fourth arc 278 is arranged in the L-shaped groove 277, the fourth arc 278 is connected to the U-shaped step 279, and the U-shaped step is used for buffering the insertion. The arc protrusion of the fourth arc 278 makes the conduction and power-on more reliable and stable.

[0066] Specifically, as shown in the appendix Figure 1 As shown, the multi-U-shaped groove plate 264 is provided with two counterbores 293, and the base 291 is provided with two corresponding through holes 284. Screws pass through the counterbores 293 and the through holes 284 and are connected to the T-shaped opening groove 250 to form a connection and fixation effect.

[0067] Specifically, as shown in the appendix Figure 1 As shown, the bottom surface of the first I-shaped groove 282 is provided with a stepped surface 302, and the groove 281 is arranged on the stepped surface 302. Here, the stepped surface 302 is lower than the bottom surface of the second I-shaped groove 283, forming a stepped structure, which also realizes the limit of the sliding tongue plate 265.

[0068] Specifically, as shown in the appendix Figure 1 As shown, the multi-U-shaped groove plate 264 is provided with a fifth U-shaped groove 295 and a sixth U-shaped groove 294. The fifth U-shaped groove 295 is located above the sixth U-shaped groove 294, and the fifth U-shaped groove 295 and the sixth U-shaped groove 294 are connected up and down. The base 291 is provided with a square groove 287, specifically, the isolation part is provided with a square groove 287. The square groove 287 is connected to the fifth U-shaped groove 295 and the sixth U-shaped groove 294, and the square groove 287 is also connected to the first waist-shaped hole 292. One end of the sliding rod 267 is a thick cylinder, and the other end is a thin cylinder. The lower thin cylinder of the sliding rod 267 is fixed on the middle bottom plate of the square groove 287 of the base 291. The upper end of the thick cylinder of the sliding rod 267 is installed in the middle hole of the square groove 287, the fifth U-shaped groove 295, and the sixth U-shaped groove 294 and extends to the outside. The thick cylinder of the sliding rod 267 and the fourth U-shaped grooves 273 of the two sliding tongue plates 265 form a sliding pair. In addition, the sliding rod 267 can also be thick in the middle and thin at both ends.

[0069] Specifically, as shown in the appendix Figure 1As shown, at the front end of the multi-U-groove plate 264, there is a seventh U-groove 296 and an L-shaped relief groove 297 that cooperate with the partition part 300. The seventh U-groove 296 communicates with the L-shaped relief groove 297.

[0070] Specifically, as shown in the appendix Figure 4 As shown, at the lower left end of the T-plate 237, two clamping grooves 251 are provided. Both of the two clamping grooves 251 are used to cooperate with the U-shaped sliding plate 238. An eighth U-groove 253 is provided in the middle of the U-shaped sliding plate 238. A second waist-shaped hole 254 is provided on the eighth U-groove 253. A expansion spring is assembled in the second waist-shaped hole 254 to enable the U-shaped sliding plate 238 to slide in the clamping groove 251. The upper steps at both ends of the eighth U-groove 253 serve as sliding stroke limits. The upper steps at both ends of the eighth U-groove 253 are formed by welding or assembling.

[0071] Specifically, as shown in the appendix Figure 5 As shown, the T-plate 237 includes an upper mounting plate 313 and a lower mounting plate 312. The upper mounting plate 313 slides relative to the lower mounting plate 312. Here, the lower mounting plate 312 is an L-shaped structure placed horizontally. The upper mounting plate 313 only cooperates with the lower mounting plate 312. Specifically, the upper mounting plate 313 cooperates with the upper left end of the lower mounting plate 312. There is no other structure above the right end of the lower mounting plate 312, only a long rail (not shown in the figure) for the upper mounting plate 313 to slide, enabling the upper mounting plate 313 to move to above the right end of the lower mounting plate. The trapezoidal sliding groove on the bottom surface of the upper mounting plate 313 and the trapezoidal sliding rail on the lower mounting plate 312 form a trapezoidal sliding pair 315. At the same time, its lower end extends out of the long rail and is clamped in the U-grooves on both sides of the upper end of the lower mounting plate 312 to achieve sliding, enabling the upper mounting plate 313 to move stably along a specific trajectory under the drive of a motor or a cylinder. The T-shaped opening groove 250 and the relief L-port 249 are provided on the upper mounting plate 313. The lower mounting plate 312 is connected with an L-shaped plate 310. The L-shaped plate 310 fixes the second pin 317 of the mutual inductor 17. Here, the second pin 317 is specifically the communication pin of the mutual inductor 17. The upper end of the L-shaped plate 310 is provided with a mounting screw hole 311 for fixing the second pin 317. When the switch unit 16 finishes detection, the upper mounting plate 313 drives the opening and closing mechanism to move to one side of the mutual inductor 17, and the opening and closing mechanism detects the mutual inductor 17.

[0072] On the rear end face of the lower mounting plate 312, there are lower plate mounting holes 316 for installing a driving motor or a cylinder. On the rear end face of the upper mounting plate 313, there are screw holes 314 for connecting the driving shaft or rod of the motor or the cylinder, thereby achieving the effect of driving the upper mounting plate 313 to move by the motor or the cylinder.

[0073] After the opening and closing of the switch unit 16 and the detection of the on / off of the first pin 162 are realized, the on / off of the mutual inductor 17 is detected by moving the second pin 317 to another position, and the matching current between the switch unit and the second pin 317 is detected through the opening and closing mechanism. The opening and closing actions of the switch unit 16, the monitoring of the lower end for anti-stealing of electricity, the fault detection and protection, the verification of the metering accuracy, and whether the communication is faulty or interfered are judged according to the existing standards for the power-on and power-off and time, and whether the power-on and power-off and performance are intact.

[0074] The specific functions of adding the above components in the detection scheme: 1. The lower mounting plate 312 serves as a basic mounting component, playing the role of supporting and fixing other components. The L-shaped plate 310 is mounted at its front end, a pair of U-shaped sliding plates 238 are mounted at its rear end, and the upper mounting plate 313 is mounted at its upper end, making these components form an organic whole. Lower plate mounting holes 316 are provided on the rear end face for mounting a driving motor or cylinder, providing a mounting position for the power source for the moving operation during the entire detection process.

[0075] 2. Mounting screw holes 311 for fixing the second pin 317 are provided at the upper end of the L-shaped plate 310, mainly used to fix the second pin 317 to ensure the stable position of the second pin 317 during the detection process, so as to cooperate with other components to complete the on / off detection of the mutual inductor.

[0076] 3. The U-shaped sliding plates 238 are mounted at the rear end of the lower mounting plate 312 and can play an auxiliary supporting and guiding role in cooperation with other components to ensure the stability of the entire opening and closing mechanism during the movement or operation process.

[0077] 4. The T-shaped opening groove 250 at the front end of the upper mounting plate 313 is used to mount the opening and closing mechanism, providing a mounting position for the opening and closing operation. The trapezoidal sliding groove on the upper mounting plate 313 and the trapezoidal sliding rail on the lower mounting plate 312 form a trapezoidal sliding pair 315. At the same time, its lower end extends out a long rail and is clamped in the U-shaped grooves on both sides of the upper end of the lower mounting plate 312 to achieve sliding, so that the upper mounting plate 313 can move stably along a specific trajectory under the drive of a motor or cylinder. Screw holes 314 for connecting the drive shaft or rod of the motor or cylinder are provided on the rear end face for connecting the power device to receive power input, thereby driving the opening and closing mechanism to move.

[0078] 5. The opening and closing mechanism (mounted in the T-shaped opening groove 250) is used to realize the opening and closing actions of the switch unit and is a key component for detecting the opening and closing of the switch unit and the on / off of the second pin 317. At the same time, during the on / off detection process of the mutual inductor 17, the tongue plate 265 on the opening and closing mechanism is moved by the upper mounting plate 313, and the on / off and communication of the mutual inductor 17 are detected according to the opening and closing method of the switch unit 16, playing the role of detecting the on / off of the current and signal communication.

[0079] 6. The drive motor or cylinder is installed in the lower plate mounting hole 316 at the rear end of the L-shaped lower mounting plate 312, and its drive shaft or rod is connected to the upper mounting plate 313 through the screw hole 314. By the telescopic or rotational movement of the drive shaft, the upper mounting plate 313 is driven to move, thereby realizing the position switching of the opening and closing mechanism between the first pin 162 and the second pin 317, providing power support for the entire detection process.

[0080] 7. The second pin 317 and the first pin 162 of the second pin 317 are the interfaces for connecting the current transformer and the detection mechanism, and are used for the on-off detection and communication detection of the current transformer. The first pin 162 is the interface for detecting the opening and closing and on-off conditions of the switch unit. The two are the key connection points for detecting the on-off performance of the switch unit and the current transformer.

[0081] The working principle of the opening and closing mechanism is as follows: Closing process: During closing, when certain conditions are met, such as when the control module determines that parameters such as the power supply loop current, leakage situation, and voltage are normal, the corresponding switch unit 16 will be driven. In this embodiment, the switch unit 16 takes a common circuit breaker as an example. When the closing button is pressed, the closing electromagnet is energized, and the iron core is attracted and moves downward, pulling the positioning member to release the energy storage maintenance. The closing spring drives the energy storage bushing to rotate counterclockwise, and its cam presses the drive shaft bushing, driving the connecting plate and the rocker arm to move, so that the rocker arm latches the half shaft, and the mechanism is in the closing state, and the main contacts are closed to achieve closing. Opening process: During opening, when the control module detects a fault or receives an opening signal, such as faults such as overload, leakage, over-voltage or under-voltage occur, the opening relay or the shunt release coil will be driven. For example, in a circuit breaker, when the opening electromagnet receives a signal, the iron core is attracted, the ejector rod in the opening release moves upward, causing the release shaft to rotate, driving the ejector rod to move upward, pushing the bent plate and driving the half shaft to rotate counterclockwise, the half shaft and the rocker arm are unlatched, and under the action of the opening spring, the circuit breaker completes the opening operation. Current transformer on-off detection process: In the opening and closing mechanism, the drive shaft of the motor or cylinder drives the upper mounting plate 313, and the upper mounting plate 313 drives the tongue plate 265 on the opening and closing mechanism to move from the axis of the first pin 162 of the switch unit 16 along the trapezoidal sliding pair 315 to the second pin 317 of the current transformer 17, and the on-off and communication of the current transformer 17 are detected according to the opening and closing method of the switch unit 16. Through the cooperation of the opening and closing mechanism and the second pin 317 of the current transformer 17, the on-off and communication conditions of the current transformer 17 are detected.

[0082] In the opening and closing mechanism of the mutual inductor 17 and the switch unit 16, the driving shaft of the motor or cylinder drives the upper mounting plate. The upper mounting plate 313 drives the tongue plate 265 on the opening and closing mechanism to move from the axis of the first pin 162 along the trapezoidal sliding pair 315 to the second pin 317. According to the opening and closing method of the switch unit 16, the on-off and communication of the mutual inductor 17 are detected. Through the cooperation of the opening and closing mechanism and the second pin 317, the detection of the on-off and communication conditions of the mutual inductor 17 is realized.

[0083] Embodiment 2 This embodiment provides a sampling element welding fixture, as shown in the appendix Figures 1 - 12 and includes: The bottom plate 11 is used to cooperate with the workbench surface. Here, the bottom plate 11 can be movably connected to the workbench surface, or the bottom plate 11 can be fixedly connected to the workbench surface. Those skilled in the art can adjust according to actual needs. The bottom plate 11 is provided with a first concave cavity 113 and a first fixing cavity 114. The first fixing cavity 114 is used to fix the terminal box unit 15. Here, the first fixing cavity 114 opens upward, and the terminal box unit 15 is placed into the first fixing cavity 114 from above.

[0084] The sixth connecting plate 111 is accommodated in the first concave cavity 113 and slides relative to the first concave cavity 113, that is, the sixth connecting plate 111 slides in the first concave cavity 113. Here, the sliding direction is specifically sliding toward the first fixing cavity 114. The sixth connecting plate 111 is provided with a second fixing cavity 131, and the second fixing cavity 131 is used to fix the switch unit 16. The switch unit 16 is fixed in the second fixing cavity 131.

[0085] The clamping unit is slidably connected to the sixth connecting plate 111. The clamping unit is arranged above the sixth connecting plate 111 and slides relative to the sixth connecting plate 111. Here, the clamping unit slides toward the first fixing cavity 114. The clamping unit is provided with a third fixing cavity 132, and the third fixing cavity 132 is used to fix the mutual inductor 17. The mutual inductor 17 is fixed through the third fixing cavity 132.

[0086] The first driving mechanism 14 is linked with the sixth connecting plate 111. The first driving mechanism 14 drives the sixth connecting plate 111 to reciprocate toward the first fixing cavity 114. Here, the first driving mechanism 14 can be in the form of a cylinder or an oil cylinder or a lead screw drive, etc.

[0087] The fourth driving mechanism A29 is linked with the clamping unit. The fourth driving mechanism A29 drives the clamping unit to reciprocate toward the first fixing cavity 114.

[0088] The opening / closing and on / off detection mechanism of the smart meter. The opening / closing and on / off detection mechanism of the smart meter has been described in detail in Embodiment 1, so it will not be described in detail here. The opening / closing mechanism is located at the rear end of the second fixed cavity 131, that is, along the Y-axis direction.

[0089] The first pressing mechanism 12 is used to fix the terminal box unit 15. Here, the first pressing mechanism 12 abuts against the top surface of the terminal box unit 15.

[0090] The terminal box unit 15 is fixed with a switch unit copper terminal 151 and a current transformer copper terminal 152. Here, the number of the switch unit copper terminals 151 and the number of the current transformer copper terminals 152 can be adjusted according to actual needs. Due to the different phases of the electric meter, their corresponding numbers are different. The switch unit 16 is fixed with a second conductive member 161, and the current transformer 17 is fixed with a third conductive member 171. Both the second conductive member 161 and the third conductive member 171 are fixed with solder tabs. The second conductive member 161 is welded to the switch unit copper terminal 151; the third conductive member 171 is welded to the current transformer copper terminal 152. When the entire fixture is fixed in place, through the cooperation of the upper electrode and the lower electrode, the effect of welded connection is formed. Here, the welding method is specifically resistance brazing. With this structural arrangement, first, the switch unit 16 and the current transformer 17 move relative to the terminal box unit 15, making the cooperation between the switch unit 16, the current transformer 17 and the terminal box unit 15 more stable. Moreover, the combined fixing method of the three components forms an automated processing and welding, which can avoid the faults caused by manual operation. The setting of the solder tabs improves the welding quality during the welding process.

[0091] Specifically, as shown in the appendix Figures 3 - 4As shown, the bottom plate 11 is provided with a sliding groove 112. Here, a bump 115 is provided on the bottom plate 11, and a part of the bump 115 extends into the first concave cavity 113. A sliding groove 112 is provided on the side surface of the bump 115. The sliding groove 112 is provided with a first horizontal groove 1121 and a first inclined groove 1122. The first horizontal groove 1121 is communicated with the first inclined groove 1122. The first inclined groove 1122 is closer to the first fixed cavity 114 than the first horizontal groove 1121. Moreover, the first inclined groove 1122 is inclined downward toward the first fixed cavity 114. The sixth connecting plate 111 is provided with a first protrusion 256. The first protrusion 256 is located on the side surface of the sixth connecting plate 111. The first protrusion 256 slides in the sliding groove 112. When the sixth connecting plate 111 slides relative to the bottom plate 11, the first protrusion 256 slides along the sliding groove 112. Here, it should be noted that the number of the first protrusions 256 is one, which only has the effect of unilateral guiding. Since the contact surfaces of the switch unit 16 and the terminal box unit 15 are not at the same horizontal height as the contact surfaces of the current transformer 17 and the terminal box unit 15, the first driving mechanism 14 drives the sixth connecting plate 111 to move. When the first protrusion 256 cooperates with the first inclined groove 1122, an action of pressing downward obliquely is formed, so that the welding cooperation between the switch unit 16 and the terminal box unit 15, and between the current transformer 17 and the terminal box unit 15 is achieved. In addition, the downward pressing and fixing method here can also be vertical downward pressing, that is, there are two fixing blocks above the second fixing cavity 131 and the third fixing cavity 132 to realize a vertical downward pressing and fixing structure. However, the problem with this structure is that the space in the vertical direction is mainly used to place the switch unit 16 and the current transformer 17. In the whole automation process, the utilization rate of the upper space is insufficient, and interference is likely to occur, and a good layout cannot be formed. By using the cooperation of the sliding groove 112 and the first protrusion 256 on one side, an effect of pressing downward is cleverly formed. Through the elasticity of the second conductive member 161 and the third conductive member 171 itself, the problem of height difference is solved, so that there is more space above vertically, which is convenient for the work of the manipulator or other devices. The design of the first inclined groove 1122 is simple, delicate and highly practical.

[0092] Specifically, as shown in the attached Figures 3 - 4As shown in the figure, it further includes a positioning frame A119 and a return spring 120. The positioning frame A119 is provided with a first U-shaped groove A257 and a first fixing column A105. On both sides of the front arm of the first U-shaped groove A257, a double-sided L-shaped first stepped opening groove A120 and a second stepped opening groove A124 are symmetrically arranged. The first stepped opening groove A120 and the second stepped opening groove A124 are used for the positioning and support of the third conductive member 171. When the mutual inductor 17 is fixed in the third fixed cavity 132, the number of the third conductive members 171 is two, and the two third conductive members 171 are respectively matched with the first stepped opening groove A120 and the second stepped opening groove A124. The bottom surface of the positioning frame A119 is provided with a 7-shaped stepped surface A123, and the 7-shaped stepped surface A123 is used for the return spring 120 to tighten the positioning frame A119 to achieve a limiting effect. The sixth connecting plate 111 is provided with a first opening groove A255 and a second opening groove A118. The positioning frame A119 is matched with the first opening groove A255 and the second opening groove A118. A linear ball guide is installed between one side surface of the positioning frame A119 and the first opening groove A255, and a linear ball guide is installed between the other side surface of the positioning frame A119 and the first opening groove A255 to form a relative sliding effect through the linear ball guide. Here, the positioning frame A119 is provided with a mounting groove A35 for installing the linear ball guide. The positioning frame A119 slides relative to the sixth connecting plate 111. The clamping unit is fixed on the positioning frame A119. Since the positioning frame A119 and the clamping unit are fixed, the sliding effect of the clamping unit relative to the sixth connecting plate 111 is realized. The bottom plate 11 is provided with a second fixing column 105. One end of the return spring 120 is matched with the first fixing column A105, and the other end of the return spring 120 is matched with the second fixing column 105. A fifth connecting plate A32 is fixed on the bottom plate 11, and the fifth connecting plate A32 is matched with the fourth driving mechanism A29. When the bottom plate 11 slides, due to the acting force of the return spring 120, a soft connection effect is formed between the positioning frame A119 and the bottom plate 11, thereby realizing the driving of the positioning frame A119. This design of the return spring 120 tension + moving pair mainly aims at the problems that the positioning and clamping and welding of the third conductive member 171 on the mutual inductor 17 cannot be separated in the prior art, and the problem of poor welding during the welding process between the positioning frame A119 and the copper terminal 152 of the mutual inductor and the third conductive member 171. Through the movement of the positioning frame A119, a relative movement effect can be formed. The sixth connecting plate 111 is further provided with a third opening groove A126.

[0093] Specifically, as shown in the attached Figures 9 - 12 figure, the number of the first U-shaped grooves A257 is one or two or three, and each first U-shaped groove A257 is correspondingly fixed with a clamping unit. One clamping unit is correspondingly fixed to one first U-shaped groove A257, and one clamping unit corresponds to one mutual inductor 17. As shown in the attached Figure 4As shown, when the electricity meter is single-phase, the number of the first U-shaped grooves A257 is one. Here, the number of the first opening grooves A255 and the second opening grooves A118 on the sixth connecting plate 111 are both one, forming a corresponding effect. As attached Figure 9 As shown, when the electricity meter is two-phase, the number of the first U-shaped grooves A257 is two. Here, the number of grooves on the sixth connecting plate 111 is three, forming a corresponding effect. As attached Figure 11 As shown, when the electricity meter is three-phase, the number of the first U-shaped grooves A257 is three. Here, the number of grooves on the sixth connecting plate 111 is four, forming a corresponding effect.

[0094] Specifically, as attached Figures 3 - 4 As shown, it further includes a tenth connecting plate 124. The tenth connecting plate 124 is connected to the bottom plate 11. The tenth connecting plate 124 is provided with a support plate 241. The support plate 241 is provided with a buffer spring hole. A spring is accommodated in the buffer spring hole, and the other end of the spring abuts against the clamping unit. This buffer spring hole is used for the first protrusion 256 to slide along the first inclined groove 1122. The spring buffer rotates and jacks up the clamping unit, preventing overvoltage between the switch unit 16 and the switch unit copper terminal 151, and between the mutual inductor 17 and the mutual inductor copper terminal 152 from causing cracking and excessive extrusion of the solder, resulting in excessive overflow of the solder and insufficient brazing welds.

[0095] Specifically, a first sliding pair 33 is provided between the side wall of the first cavity 113 and the sixth connecting plate 111. The setting of the first sliding pair 33 improves the sliding effect of the sixth connecting plate 111 relative to the bottom plate 11.

[0096] Specifically, as attached Figures 6 - 8As shown, the clamping unit includes a fixed jaw 25 and a rotating jaw 26. One end of the rotating jaw 26 rotates relative to the fixed jaw 25, and the other end of the rotating jaw 26 cooperates with the fixed jaw 25 to form a third fixed cavity 132. A pressing spring is provided between the fixed jaw 25 and the rotating jaw 26. The fixed jaw 25 is provided with an inner arc 258, and the rotating jaw 26 is provided with a first L-shaped step groove 261, a first arc 128, a second arc 129, and a third arc A127, which are connected in sequence. The clamping unit forms the clamping and fixing of the mutual inductor 17. Since the main part of the mutual inductor 17 is annular, the clamping and fixing is formed through the clamping mechanism. Secondly, after the welding is completed, at this time, the terminal box unit 15, the switch unit 16, and the mutual inductor 17 form an integral structure. By rotating the rotating jaw 26, the whole can be taken out to perform the next detection operation, and the operation is highly convenient. Moreover, this structural setting forms the fixing effect of different mutual inductors 17, and this clamping unit can be applied to the mutual inductors 17 of the Southern Power Grid and the State Grid. The fixed jaw 25 is provided with a driving part. The rotating jaw 26 and the fixed jaw 25 rotate through a rotating shaft 260, and the driving part elastically presses against the rotating shaft 260. The driving part is provided with a hole for installing the rotating shaft 260. The front end of the fixed jaw 25 is provided with an inner arc 258 for pressing and positioning the outer edge of the mutual inductor 17 (not shown in the figure) and conforming to the outer shape of the mutual inductor 17. An outer arc 125 is provided outside the inner arc 258. The rotating jaw 26 is provided with a first L-shaped step groove 261 for making way for the communication line of the mutual inductor 17. Connected to the first L-shaped step groove 261 is a first arc 128 with a counterclockwise slope greater than 30 degrees, and the first arc 128 is used for positioning the mutual inductor 17 of the State Grid. Adjacent to the first arc 128 is a second arc 129 with a counterclockwise slope greater than 5 degrees. The second arc 129 is used for positioning the mutual inductor 17 of the State Grid, and the width of the second arc 129 is greater than the first protruding end arc A129 and the second protruding end arc A1291 of the mutual inductor 17 of the State Grid. The second protruding end arc A1291 is adjacent to the first arc 128, the first protruding end arc A129 is adjacent to the third arc A127, and the height of the second protruding end arc A1291 is greater than that of the first protruding end. Adjacent to the second arc 129 is an outer arc 125 of the inclined surface of the mutual inductor 17 of the State Grid for tightening and limiting the third arc A127, which is in close fit with the first arc 128; this limitation can not only ensure the limitation and non-shaking of the mutual inductor 17 of the State Grid, but also limit and ensure that the upper conductive pin of the mutual inductor 17 does not shift vertically, horizontally, or in any other direction. The difference between the clamping unit of the mutual inductor 17 of the Southern Power Grid and the clamping unit of the mutual inductor 17 of the State Grid is that the second protruding end arc A1291 is not provided on the rotating jaw 26. This limitation can not only ensure the limitation and non-shaking of the mutual inductor 17 of the State Grid, but also limit and ensure that the upper conductive pin of the mutual inductor 17 does not shift vertically, horizontally, or in any other direction.

[0097] Specifically, as shown in the appendixFigures 3 - 4 As shown, the first pressing mechanism 12 includes a first pressing member 121. The first pressing member 121 rotates horizontally and moves vertically up and down relative to the bottom plate 11. The first pressing member 121 can rotate in the horizontal direction, and the first pressing member 121 can also move vertically up and down. The vertical up and down movement in this embodiment specifically refers to moving vertically up and down along the Z-axis direction. The first pressing member 121 is used to fix the terminal box unit 15 to prevent the terminal box unit 15 from shaking during the welding process. In the initial state, the first pressing member 121 rotates to the outside of the first fixing cavity 114 so that the terminal box unit 15 can be placed into the first fixing cavity 114. After the terminal box unit 15, the switch unit 16, and the mutual inductor 17 are placed, the first pressing member 121 will rotate above the terminal box unit 15 and move towards the terminal box unit 15 until it abuts against the terminal box unit 15 to form a fixing effect. Here, how the first pressing mechanism 12 realizes rotation and lifting is specifically realized by a rotation motor and a lifting motor. This is prior art, so it will not be described in detail in this embodiment.

[0098] Specifically, as shown in the appendix Figures 3 - 4 Figures 3 - 4 As shown, a floating pressure limiting unit 239 is provided at one end of the sixth connecting plate 111 facing the first fixing cavity 114, and a switching mechanism is provided at the end of the sixth connecting plate 111 away from the first fixing cavity 114. The floating pressure limiting unit 239 gives a reverse acting force to the second conductive member 161 to prevent overvoltage between the switch unit 16 and the switch unit copper terminal 151, and between the mutual inductor 17 and the mutual inductor copper terminal 152 from causing cracking and excessive extrusion of the solder, resulting in too much solder overflow and insufficient brazing welds. The floating pressure limiting unit 239 includes a 7-shaped clamping plate 243. The 7-shaped clamping plate 243 is connected to one end of the sixth connecting plate 111 close to the first fixing cavity 114. The 7-shaped clamping plate 243 is provided with a second U-shaped groove 244 and a third U-shaped groove 246. The second U-shaped groove 244 and the third U-shaped groove 246 are both provided with floating jacking components. The floating jacking components are a combination of a spring and a T-shaped sliding column, which are used to prevent the second conductive member 161 on the switch unit 16 from moving and assembling to push off the solder pad and to prevent too much solder overflow or insufficient soldering of the solder pad. First through-hole grooves 245 and second through-hole grooves 248 are provided on both sides of the lower end of the 7-shaped clamping plate 243, and the left and right positions of the second conductive member 161 on the switch unit 16 are adjusted by screws. The third U-shaped groove 246 communicates with the second relief groove 247 of the second conductive member 161 on the switch unit 16.

[0099] Specifically, as shown in the appendix Figures 3 - 4 ​As shown, the first fixed cavity 114 is provided with an intermediate groove A132, a first relief groove A136, and a front groove A134. The intermediate groove A132, the first relief groove A136, and the front groove A134 are connected. Through holes 133 are provided at both ends of the front groove A134, and L-shaped sliding plates are fixed to the through holes 133. The front groove A134 is the support structure of the terminal box unit 15, forming a support and limit effect.

[0100] Specifically, it further includes a second driving mechanism 29 and a buffer mechanism 30. The second driving mechanism 29 drives the fixing device to move up and down. Here, the second driving mechanism 29 drives the bottom plate 11 to move along the first direction, and specifically, the first direction is along the Z-axis direction. In this embodiment, a first side plate 31 is further connected to the side of the bottom plate 11. The second driving mechanism 29 cooperates with the first side plate 31 through a second moving pair A21 to form a movement effect, driving the first side plate 31 to slide vertically up and down. The buffer mechanism 30 cooperates with the bottom plate 11, and the buffer mechanism 30 plays a buffering and positioning effect to prevent the bottom plate 11 from causing the phenomenon of lower electrode fracture during the movement. When the terminal box unit 15, the switch unit 16, and the mutual inductor 17 are fixed, there is a certain gap between the lower electrode and the welding position, and specifically, this gap is 10 mm - 15 mm. The copper terminals 151 of the switch unit, the copper terminals 152 of the mutual inductor, the second conductive member 161, and the third conductive member 171 all have a certain elastic effect. During the downward pressing process of the upper electrode, this gap can be compensated to achieve a welding effect. The buffer mechanism 30 is adjustable and includes a screw and a nut. The second side plate 32 is connected to the bottom plate 11, and the screw cooperates with the second side plate 32 to form an adjustment effect, and the nut is used for fixation. Here, a buffer member, such as a spring or other elastic member, is also provided at the lower end of the screw. In addition, the second driving mechanism 29 is not limited to vertical up and down sliding. The second driving mechanism 29 can also drive the first side plate 31 to slide back and forth, or drive the first side plate 31 to slide horizontally left and right.

[0101] Specifically, it further includes a third driving mechanism 40 and a fifth driving mechanism 41. The third driving mechanism 40 drives the bottom plate 11 to move along the second direction, and the fifth driving mechanism 41 drives the bottom plate 11 to move along the third direction. The first direction, the second direction, and the third direction are perpendicular to each other. Here, the first direction is the Z-axis direction, the second direction is the X-axis direction, and the third direction is the Y-axis direction. The second driving mechanism 29, the third driving mechanism 40, and the fifth driving mechanism 41 form driving effects in different directions, that is, they form sliding effects in the three directions of the X-axis, Y-axis, and Z-axis.

[0102] Specifically, it further includes a first connecting plate A20, a second connecting plate A22, a third connecting plate A23, a fourth connecting plate A25, and a seventh connecting plate A33. The third driving mechanism 40 drives the first connecting plate A20 to move, and the third driving mechanism 40 drives the first connecting plate A20 to realize the sliding of the bottom plate 11 in the X-axis direction. The fifth driving mechanism 41 is arranged above the first connecting plate A20. The fifth driving mechanism 41 drives the second connecting plate A22 to be connected. The third connecting plate A23 is vertically connected to the second connecting plate A22. The fourth connecting plate A25 is arranged in parallel with the second connecting plate A22. The fourth connecting plate A25 is vertically connected to the third connecting plate A23. The seventh connecting plate A33 is vertically connected to the bottom plate 11. The seventh connecting plate A33 is respectively connected to the third connecting plate A23 and the second connecting plate A22. Through the cooperation between multiple connecting plates, a certain connection strength is formed to meet the movement in different directions. It should also be noted that the second driving mechanism 29 is arranged on the fourth connecting plate A25.

[0103] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A switch-on / off detection mechanism for a smart meter, characterized in that: include: A floating pressing unit, the floating pressing unit comprising a T-plate (237), the T-plate (237) being provided with a T-shaped opening groove (250) and a yielding L-mouth (249); An opening and closing mechanism, the opening and closing mechanism being accommodated in the T-shaped opening groove (250), the opening and closing mechanism being provided with a chamber, the chamber being open at the front and rear; A sliding tongue plate (265), wherein the number of the sliding tongue plates (265) is two, the two sliding tongue plates (265) are accommodated in the chamber, the two sliding tongue plates (265) are symmetrically arranged, the front end of the sliding tongue plate (265) extends to the outside of the front end of the chamber, and is used to cooperate with the first pin (162) of the switch unit (16); the rear end of the sliding tongue plate (265) extends to the outside of the rear end of the chamber, and the rear end of the sliding tongue plate (265) cooperates with the driving source and the power line; A sliding rod (267), the sliding rod (267) extending between the two sliding tongue plates (265) to form a sliding pair; An elastic reset member, one end of which abuts against one of the sliding tongue plates (265), and the other end of which abuts against another of the sliding tongue plates (265), and the elastic reset member is located at the front end of the chamber; In a first state, the sliding tongue plate (265) moves toward the switch unit (16), and the front end of the sliding tongue plate (265) cooperates with the first pin (162) to form a disconnection effect of the switch unit (16); In the second state, the front end of the sliding tongue plate (265) cooperates with the first pin (162) to form a connection effect of the switch unit (16); and the sliding tongue plate (265) moves away from the switch unit (16).

2. The switch-on / off detection mechanism of the smart meter according to claim 1, characterized in that: It also includes a positioning pin (268), the sliding tongue plate (265) is provided with a first positioning hole (272), the positioning pin (268) passes through the first positioning hole (272) and is linked with the sliding tongue plate (265), and the first positioning hole (272) is located at the rear end of the chamber.

3. The switch-on / off detection mechanism of the smart meter according to claim 2, characterized in that: The opening and closing mechanism comprises a base (291) and a multi-U-shaped groove plate (264), wherein the base (291) cooperates with the multi-U-shaped groove plate (264) to form the chamber, wherein the base (291) is provided with a partition portion (300), wherein the partition portion (300) is provided with a first waist-shaped hole (292), and the elastic reset member passes through the first waist-shaped hole (292); and the two sliding tongue plates (265) are respectively arranged on both sides of the partition portion (300).

4. The switch-on / off detection mechanism of the smart meter according to claim 3, characterized in that: The base (291) is provided with a first I-shaped groove (282) and a second I-shaped groove (283), the first I-shaped groove (282) is connected to the second I-shaped groove (283), the sliding tongue plate (265) passes through the first I-shaped groove (282) and the second I-shaped groove (283) and extends to the outside of the front end of the chamber, and the bottom surface of the first I-shaped groove (282) is provided with a groove (281); the lower end of the positioning pin (268) is provided with a convex point; the sliding tongue plate (265) is provided with a second lower step (274), and the second lower step (274) is provided with a step portion (301). In the initial position, the convex point cooperates with the groove (281), the sliding tongue plate (265) slides, and the step portion (301) abuts against the first I-shaped groove.

5. The switch-on / off detection mechanism of the smart meter according to claim 1, characterized in that: The front end of the sliding tongue plate (265) is provided with a fourth arc (278) and an I-shaped step (279), the fourth arc (278) is connected to one end of the I-shaped step (279), and the other end of the I-shaped step (279) extends obliquely toward the front end of the sliding tongue plate (265) opposite thereto.

6. The switch-on / off detection mechanism of the smart meter according to claim 1, characterized in that: The T-plate (237) comprises an upper mounting plate (313) and a lower mounting plate (312); the upper mounting plate (313) slides relative to the lower mounting plate (312); the T-shaped opening groove (250) and the yielding L-shaped opening (249) are arranged on the upper mounting plate (313); the lower mounting plate (312) is connected to an L-shaped plate (310), and the L-shaped plate (310) fixes a second pin (317) of the mutual inductor (17); when the switch unit (16) is detected, the upper mounting plate (313) drives the opening and closing mechanism to move to one side of the mutual inductor (17), and the opening and closing mechanism detects the mutual inductor (17).

7. A sampling element welding fixture, characterized in that: include: A bottom plate (11), the bottom plate (11) being provided with a first concave cavity (113) and a first fixing cavity (114), the first fixing cavity (114) being used for fixing the terminal box unit (15); a sixth connecting plate (111), the sixth connecting plate (111) being accommodated in the first concave cavity (113), and the sixth connecting plate (111) sliding relative to the first concave cavity (113); the sixth connecting plate (111) being provided with a second fixing cavity (131), the second fixing cavity (131) being used for fixing the switch unit (16); A clamping unit, the clamping unit being slidably connected to the sixth connecting plate (111), the clamping unit being provided with a third fixing cavity (132), the third fixing cavity (132) being used to fix the mutual inductor (17); a first driving mechanism (14), the first driving mechanism (14) being linked to the sixth connecting plate (111), the first driving mechanism (14) driving the sixth connecting plate (111) to reciprocate toward one side of the first fixing cavity (114); a fourth driving mechanism (A29), the fourth driving mechanism (A29) being linked to the clamping unit, the fourth driving mechanism (A29) driving the clamping unit to reciprocate toward one side of the first fixing cavity (114); A first pressing mechanism (12), the first pressing mechanism (12) being used for fixing the terminal box unit (15); The opening and closing and on-off detection mechanism of the smart meter according to any one of claims 1 to 5, wherein the opening and closing mechanism is located at the rear end of the second fixed cavity (131); The terminal box unit (15) is fixed with a switch unit copper terminal (151) and a transformer copper terminal (152); the switch unit (16) is fixed with a second conductive member (161); the transformer (17) is fixed with a third conductive member (171); the second conductive member (161) and the third conductive member (171) are both fixed with welding pieces; the second conductive member (161) is connected to the switch unit copper terminal (151) by welding; and the third conductive member (171) is connected to the transformer copper terminal (152) by welding.

8. The sampling element welding fixture according to claim 7, characterized in that: The bottom plate (11) is provided with a slide groove (112), the slide groove (112) is provided with a first horizontal groove (1121) and a first inclined groove (1122), the first horizontal groove (1121) is connected with the first inclined groove (1122), and the sixth connecting plate (111) is provided with a first protrusion (256), and the first protrusion (256) is located in the slide groove (112) and slides.

9. The sampling element welding fixture according to claim 7, characterized in that: The invention also includes a positioning frame (A119) and a return spring (120); the positioning frame (A119) is provided with a first U-shaped groove (A257) and a first fixing column (A105); the first U-shaped groove (A257) is symmetrically provided with a double-sided L-shaped first step opening groove (A120) and a second step opening groove (A124) on both sides of the front arm; the first step opening groove (A120) and the second step opening groove (A124) are used for positioning and supporting the third conductive member (171); the bottom surface of the positioning frame (A119) is provided with a 7-shaped step surface (A123); the sixth connecting plate (111) is provided with a first opening groove (A255) and a second opening groove (A124); A linear ball guide is installed between one side of the positioning frame (A119) and the first opening groove (A255), and a linear ball guide is installed between the other side of the positioning frame (A119) and the first opening groove (A255); the positioning frame (A119) slides relative to the sixth connecting plate (111), and the clamping unit is fixed on the positioning frame (A119); the base plate (11) is provided with a second fixed column (105), one end of the return spring (120) cooperates with the first fixed column (A105), and the other end of the return spring (120) cooperates with the second fixed column (105).

10. The sampling element welding fixture according to claim 7, characterized in that: It also includes a tenth connecting plate (124), the tenth connecting plate (124) is connected to the base plate (11), the tenth connecting plate (124) is provided with a support plate (241), the support plate (241) is provided with a buffer spring hole, a spring is accommodated in the buffer spring hole, and the other end of the spring is against the clamping unit.

11. The sampling element welding fixture according to claim 7, characterized in that: The clamping unit comprises a fixed claw (25) and a rotating claw (26); one end of the rotating claw (26) rotates relative to the fixed claw (25); the other end of the rotating claw (26) cooperates with the fixed claw (25) to form the third fixed cavity (132); a pressure spring is provided between the fixed claw (25) and the rotating claw (26); the fixed claw (25) is provided with an inner arc (258); the rotating claw (26) is provided with a first L-shaped step groove (261), a first arc (128), a second arc (129), and a third arc (A127); the first L-shaped step groove (261), the first arc (128), the second arc (129), and the third arc (A127) are connected in sequence.

12. The sampling element welding fixture according to claim 7, characterized in that: The first pressing mechanism (12) comprises a first pressing member (121), and the first pressing member (121) rotates horizontally and moves vertically up and down relative to the bottom plate (11).

13. The sampling element welding fixture according to claim 7, characterized in that: A floating pressure limit unit (239) is provided at one end of the sixth connecting plate (111) facing the first fixed cavity (114); the floating pressure limit unit (239) includes a 7-type card plate (243), the 7-type card plate (243) is connected to one end of the sixth connecting plate (111) close to the first fixed cavity (114), and a second U-shaped groove (244) and a third U-shaped groove (246) are provided on the 7-type card plate (243); the second U-shaped groove (244) and the third U-shaped groove (246) are both provided with a floating lifting assembly, and the floating lifting assembly is a combination of a spring and a T-shaped sliding column.

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