A test device for manufacturing an ammeter

Abstract

The present invention discloses a test device for manufacturing an ammeter, which belongs to the technical field of ammeter detection, and includes a base and a plurality of positioning concave plates, wherein the side wall of the positioning concave plate is connected to a moving plate through two electric push rods, and the end of the moving plate is connected to two test power supply groups for detecting Hall elements through a magnetic limit assembly, and the top of the positioning concave plate is connected to a hydraulic rod through a fixed plate, and the outer side wall of the fixed end of the hydraulic rod is fixedly connected to a U-shaped fixed plate through a pneumatic push rod. The present invention can use the two closed wire holding half rings to apply a certain pulling force to the welding line through the setting of the suction assembly and two wire holding half rings, so as to facilitate the detection of whether the line will break or fall off from the welding place under this pulling force state, and at the same time, the setting of the wide guide plate and the voltage sensor can use the change of the moving charge on the wide guide plate, and judge whether the coil on the moving contact of the clamp ammeter is operating normally according to whether its voltage change is synchronized with the alternating current voltage change on the steering conductor.

Description

Technical Field

[0001] The present invention relates to the technical field of ammeter detection, and in particular to a testing device for manufacturing an ammeter. Background Art

[0002] A clamp ammeter, also known as a clamp meter, is an instrument used to measure the current in a running electrical circuit. When using a clamp ammeter to measure current, it can be done without disconnecting the circuit.

[0003] At present, clamp ammeters used for both DC and AC circuits are generally packaged and tested for various functions used for current testing before shipment after production is completed. However, the testing principles of clamp ammeters for AC and DC circuits are different. If only a single simulation test is used, it is impossible to observe whether the core detection components are operating normally under different current circuit test conditions. If the detection fails, the subsequent rework and re-inspection process will be more complicated, resulting in low production efficiency. In addition, the Hall element is connected to the circuit board through a strip soft cable, which is inconvenient to pull and move. Therefore, the Hall element is generally set in the static contact, and the coil used to test the AC circuit is generally wrapped around the moving contact and soldered to the circuit board through a double-line cable. During the opening and closing process of the moving contact, the line connected to the coil will be pulled. If the line strength or the welding point strength is insufficient, it is easy to cause the line to disconnect or the welding point to fall off, making the clamp ammeter unable to work normally. Therefore, a test device for ammeter manufacturing is proposed. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that a single simulation test is used in the prior art, and it is impossible to observe whether the core detection components are operating normally under different current circuit test states. If a detection failure occurs, the subsequent rework and re-inspection process will be more complicated, resulting in low production efficiency. In addition, the Hall element is connected to the circuit board through a strip soft cable, which is inconvenient to pull and move. Therefore, the Hall element is generally arranged in a static contact, and the coil used to test the AC circuit is generally wound on the moving contact, and is soldered to the circuit board through a double-line cable. During the opening and closing process of the moving contact, the line connected to the coil will be pulled. If the line strength or the welding point strength is insufficient, it is easy to cause the line to be disconnected or the welding point to fall off, making the clamp ammeter unable to work normally. A test device for ammeter manufacturing is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A test device for manufacturing an ammeter, comprising a base and a plurality of positioning concave plates, wherein the side wall of the positioning concave plate is connected to a movable plate via two electric push rods, the end of the movable plate is connected to two test power supply groups for detecting Hall elements via a magnetic limit assembly, the top of the positioning concave plate is connected to a hydraulic rod via a fixed plate, the outer side wall of the fixed end of the hydraulic rod is fixedly connected to a U-shaped fixed plate via a pneumatic push rod, the inner side wall of the U-shaped fixed plate is connected to two T-shaped slides via an adjustment assembly, the tops of the two T-shaped slides are respectively connected to a suction assembly for adjusting the limit of a welding circuit via two regulating pillars, and the ends of the regulating pillars are connected to a wire holding half ring;

[0007] The top of the base is connected to a centralized guide column through a swivel seat, and the top of the centralized guide column is connected to a plurality of steering conductors, and the plurality of steering conductors are respectively arranged directly above a plurality of positioning concave plates, and a vertical panel is arranged above the positioning concave plates, and the vertical panel is connected to a pressure measurement component through a power supply.

[0008] Preferably, the top end of the base is rotatably connected to the bottom end of the rotating seat, the top end of the rotating seat is fixedly connected to the bottom ends of multiple positioning concave plates respectively, and the top end of the rotating seat is fixedly connected to the bottom end of the concentrated guide column.

[0009] Preferably, the magnetic limit assembly consists of a limit electromagnetic plate and a limit permanent magnet plate, the output end of the electric push rod is in a right-angle rod state, the output end of the electric push rod is fixedly connected to the side wall of the limit electromagnetic plate through a movable plate, the bottom end of the limit electromagnetic plate is fixedly connected to the test power supply group located below, the top end of the limit permanent magnet plate is fixedly connected to the test power supply group located above, and the two test power supply groups are electrically connected through two unfolding spring rods.

[0010] Preferably, the adjustment assembly consists of two adjustment gears and a T-shaped slide plate, the output end of the hydraulic rod is fixedly connected to two adjustment racks through a U-shaped rod, the adjustment gear is meshed with the adjustment rack, and the inner side wall of the U-shaped fixed plate is rotatably connected to the end of the T-shaped slide plate through the adjustment gear.

[0011] Preferably, the inner side wall of the T-shaped slide plate is slidably connected to the regulating pillar through a T-shaped slide plate, the end of the regulating pillar is fixedly connected to the end side wall of the wire holding half ring, and the two wire holding half rings are slidably connected to each other through an adjusting spring rod.

[0012] Preferably, the suction assembly consists of a limiting shaft and two electromagnetic columns, the side wall of the regulating column is slidably connected to the side wall of the limiting shaft through a mounting plate, the side wall of the regulating column is fixedly connected to the electromagnetic column through a mounting plate, and the inner side wall of the electromagnetic column is slidably connected to the side wall of the limiting shaft.

[0013] Preferably, the top of the positioning concave plate is fixedly connected to the side wall of the vertical panel via a fixing plate, the vertical panel is located on one side of the fixing plate, and the side wall of the vertical panel is fixedly connected to the side wall of the power supply component.

[0014] Preferably, the pressure measurement assembly consists of a wide guide plate and a voltage sensor, the output end of the power supply is electrically connected to the wide guide plate, the upper and lower side walls of the wide guide plate are electrically connected to the voltage sensor through two pressure difference rods respectively, and the top of the vertical panel on the side of the turning conductor is fixedly connected to a magnetic shielding cover.

[0015] Preferably, the top end of the centralized guide column is electrically connected to the bottom ends of a plurality of steering conductors, the other end of the steering conductor is arranged above the hydraulic rod, and magnetic shielding rings are arranged on the side walls at both ends of the steering conductor.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention can limit the clamp ammeter to the concave surface of the positioning concave plate by setting the magnetic limit assembly and the test voltage group, and realize the power supply of the internal circuit board through the two unfolded test power supply groups, so that the internal circuit board can perform data processing and function execution, which is convenient for subsequent DC circuit testing to determine whether the Hall element has voltage generated and acts on the circuit board circuit.

[0018] 2. The present invention can use the two closed wire holding half rings to apply a certain pulling force to the welding line through the setting of the suction component and the two wire holding half rings, so as to facilitate the detection of whether the line will break or fall off from the welding point under this pulling state, so that the produced clamp ammeter has better durability.

[0019] 3. The present invention can utilize the change of mobile charge on the wide guide plate and the voltage sensor to determine whether the coil on the moving contact of the clamp ammeter is operating normally according to whether its voltage change is synchronized with the AC voltage change on the steering conductor, and repeatedly perform detection when the coil welding line is pulled to explore the coil operation state in this state, so that the detection is more comprehensive and reliable, and it is also convenient to detect different core parts separately before packaging, so as to find unqualified parts in time and conduct rapid rework. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A three-dimensional structural schematic diagram of a test device for manufacturing an ammeter proposed by the present invention;

[0021] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0022] Figure 3 for Figure 1 The enlarged view of point B in the middle;

[0023] Figure 4 This is a schematic diagram of the assembly of a test device for manufacturing an ammeter proposed by the present invention;

[0024] Figure 5 This is a structural schematic diagram of the position of the vertical panel in a test device for manufacturing an ammeter proposed by the present invention;

[0025] Figure 6 for Figure 5 Enlarged view of point C in the middle;

[0026] Figure 7 This is a structural schematic diagram of a magnetic limit assembly in a test device for manufacturing an ammeter proposed by the present invention;

[0027] Figure 8 This is a structural schematic diagram of the position of a T-shaped slide plate in a test device for manufacturing an ammeter proposed by the present invention;

[0028] Fig. 9 This is a structural schematic diagram of a pull-in component in a test device for manufacturing an ammeter proposed by the present invention;

[0029] Fig.10 This is a structural schematic diagram of a pressure measurement component in a test device for manufacturing an ammeter proposed by the present invention;

[0030] Fig.11 The present invention provides a schematic structural diagram of a clamp ammeter in an unpackaged state to be tested in a test device for manufacturing an ammeter.

[0031] In the figure: 1. base; 2. positioning concave plate; 3. swivel seat; 4. electric push rod; 5. limit electromagnetic plate; 6. test power supply group; 7. limit permanent magnet plate; 8. unfolding spring rod; 9. hydraulic rod; 10. pneumatic push rod; 11. U-shaped fixed plate; 12. adjusting gear; 13. T-shaped slide plate; 14. T-shaped slide plate; 15. regulating pillar; 16. limit shaft; 17. electromagnetic column; 18. wire holding half ring; 19. adjusting spring rod; 20. adjusting rack; 21. vertical panel; 22. power supply unit; 23. wide guide plate; 24. differential pressure rod; 25. voltage sensor; 26. centralized guide column; 27. steering conductor; 28. magnetic shielding ring; 29. ​​magnetic shielding cover. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are 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 position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Example, see Figures 1 to 11 A test device for manufacturing an ammeter, comprising a base 1 and a plurality of positioning concave plates 2, the side walls of the positioning concave plates 2 are connected to a moving plate through two electric push rods 4, and the ends of the moving plate are connected to two test power supply groups 6 for detecting Hall elements through a magnetic limit assembly;

[0036] Further, the top of the base 1 is rotatably connected to the bottom of the rotating seat 3, the top of the rotating seat 3 is respectively fixedly connected to the bottom ends of the multiple positioning concave plates 2, the top of the rotating seat 3 is fixedly connected to the bottom end of the concentrated guide column 26, the magnetic limit assembly is composed of a limit electromagnetic plate 5 and a limit permanent magnet plate 7, the output end of the electric push rod 4 is in a right-angle rod state, the output end of the electric push rod 4 is fixedly connected to the side wall of the limit electromagnetic plate 5 through a movable plate, the bottom end of the limit electromagnetic plate 5 is fixedly connected to the test power supply group 6 located below, the top of the limit permanent magnet plate 7 is fixedly connected to the test power supply group 6 located above, and the two test power supply groups 6 are electrically connected through two unfolding spring rods 8;

[0037] It should be noted that: the clamp ammeter to be tested without a packaged shell is opened, the jaws are passed through the hydraulic rod 9 and the steering conductor 27, so that the clamp ammeter to be tested is placed in a vertical state into the concave surface of the positioning concave plate 2. After placement, its jaws are positioned upward, and then the two electric push rods 4 on the positioning concave plate 2 are started to move the two test power supply groups 6 into the battery compartment of the unpackaged clamp ammeter. The battery compartment of the unpackaged clamp ammeter is electrically connected to the circuit board through a wire welding (see the attached manual for details). Fig.11, is the state that the coil in the moving contact is not welded to the circuit board, and there is a groove on the package shell of the clamp ammeter that communicates with the battery compartment. Usually, the battery is installed after the package shell is assembled). After moving into the battery compartment, the power supply to the limit electromagnetic plate 5 is disconnected, so that the limit electromagnetic plate 5 loses its magnetism and does not continue to be magnetically attracted to the limit permanent magnetic plate 7. Then, the two test power supply groups 6 will be respectively bounced up and down under the action of the unfolding spring rod 8, and press against the power connection part in the battery compartment to realize the power supply of the ammeter in the clamp ammeter. The unpackaged clamp ammeter is limited under the friction of the concave surface of the positioning concave plate 2 and the extrusion of the two test power supply groups 6;

[0038] The above advantages are as follows: in this way, the two unfolded test power supply groups 6 can be used to limit the clamp ammeter to the concave surface of the positioning concave plate 2, and realize the power supply of the internal circuit board, so that the internal circuit board circuit can perform data processing and function execution, which is convenient for subsequent DC circuit testing to determine whether the Hall element has a voltage generated and acts on the circuit board circuit;

[0039] The top of the positioning concave plate 2 is connected to a hydraulic rod 9 through a fixed plate, the outer side wall of the fixed end of the hydraulic rod 9 is fixedly connected to a U-shaped fixed plate 11 through a pneumatic push rod 10, the inner side wall of the U-shaped fixed plate 11 is connected to two T-shaped slides 14 through an adjustment component, the tops of the two T-shaped slides 14 are respectively connected to a suction component for adjusting the limit of the welding line through two regulating pillars 15, and the end of the regulating pillar 15 is connected to a wire holding half ring 18;

[0040] Furthermore, the adjustment component is composed of two adjustment gears 12 and a T-shaped slide plate 13, the output end of the hydraulic rod 9 is fixedly connected to two adjustment racks 20 through a U-shaped rod, the adjustment gear 12 is meshed with the adjustment rack 20, the inner wall of the U-shaped fixed plate 11 is rotatably connected to the end of the T-shaped slide plate 13 through the adjustment gear 12, the inner wall of the T-shaped slide plate 13 is slidably connected to the regulating pillar 15 through the T-shaped slide plate 14, the end of the regulating pillar 15 is fixedly connected to the side wall of the end of the wire holding semi-ring 18, the two wire holding semi-rings 18 are slidably connected to each other through the adjustment spring rod 19, the suction component is composed of a limit shaft 16 and two electromagnetic columns 17, the side wall of the regulating pillar 15 is slidably connected to the side wall of the limit shaft 16 through the mounting plate, the side wall of the regulating pillar 15 is fixedly connected to the electromagnetic column 17 through the mounting plate, and the inner wall of the electromagnetic column 17 is slidably connected to the side wall of the limit shaft 16;

[0041] It should be noted that: during the continuous detection process, the intermittent rotation of the control seat 3 on the base 1 is convenient for the detection personnel to place the clamp ammeter to be detected into the concave surface of the new positioning concave plate 2. When placing, the operator pulls out the circuit welded between the coil on the moving contact to be detected and the internal circuit board, which is convenient for the subsequent limiting and detection of the circuit, making the entire detection process more efficient. In the subsequent detection process, the hydraulic rod 9 is started to pull the two adjustment racks 20 to one side of the positioning concave plate 2 through the U-shaped rod, and the movement of the adjustment rack 20 will drive the meshing adjustment gear 12 to rotate, and the rotation of the adjustment gear 12 will drive the T-shaped slide plate 13 to deflect downward together. The deflection of the T-shaped slide plate 13 will drive the control support 15 and the wire holding semi-ring 18 to deflect together through the T-shaped slide plate 14;

[0042] After the two wire holding half rings 18 are deflected to an angle where they can clamp the circuit where the coil on the moving contact is welded to the internal circuit board, the pneumatic push rod 10 fixed to the fixed end of the hydraulic rod 9 is started and slowly recovered, so that the two deflected wire holding half rings 18 are close to the circuit where the coil on the moving contact is welded to the internal circuit board. After the movement stops, the circuit is placed in the two wire holding half rings 18, and then the power to the two electromagnetic columns 17 is disconnected, so that the magnetic repulsion between the two electromagnetic columns 17 with the same adjacent magnetic poles in the original power-on state disappears, thereby allowing the two electromagnetic columns 17 to move under the action of the adjusting spring rod 19. The wire holding half ring 18 is closed, and the regulating support 15 keeps moving synchronously by sliding between the T-shaped slide plate 13 and the T-shaped slide plate 14, and then the pneumatic push rod 10 is controlled to be pushed out, so that the closed wire holding half ring 18 drives the line away from the clamp ammeter. With continuous pulling, the line will be placed at the closing position of the two wire holding half rings 18. If the soldering strength between the line and the circuit board is sufficient, it will be separated at the closing position. If the strength is insufficient, the line will fall off at the soldering position with the circuit board. When the clamp ammeter is subsequently removed, it only needs to be observed whether the line welding position falls off to judge the welding strength of the line.

[0043] The above advantages are: in this way, the two closed wire holding half rings 18 can be used to apply a certain pulling force to the welding line, so as to facilitate the detection of whether the line will break or fall off from the welding position under this pulling force state, so that the produced clamp ammeter has better durability;

[0044] The top of the base 1 is connected to a central guide column 26 through a rotating seat 3, and the top of the central guide column 26 is connected to a plurality of steering conductors 27, and the plurality of steering conductors 27 are respectively arranged directly above a plurality of positioning concave plates 2, and a vertical plate 21 is arranged above the positioning concave plates 2, and the vertical plate 21 is connected to a pressure measuring assembly through a power supply 22;

[0045] Furthermore, the top of the positioning concave plate 2 is fixedly connected to the side wall of the vertical plate 21 through a fixed plate, the vertical plate 21 is located on one side of the fixed plate, the side wall of the vertical plate 21 is fixedly connected to the side wall of the power supply 22, the pressure measurement assembly is composed of a wide guide plate 23 and a voltage sensor 25, the output end of the power supply 22 is electrically connected to the wide guide plate 23, the upper and lower side walls of the wide guide plate 23 are electrically connected to the voltage sensor 25 through two pressure difference rods 24, the top of the vertical plate 21 on one side of the steering conductor 27 is fixedly connected with a magnetic shielding cover 29, the top of the concentrated guide column 26 is electrically connected to the bottom ends of multiple steering conductors 27, the other end of the steering conductor 27 is arranged above the hydraulic rod 9, and magnetic shielding rings 28 are arranged on the side walls of both ends of the steering conductor 27;

[0046] It should be noted that: when the clamp ammeter is installed and tested, the steering conductor 27 is placed between the moving contact and the static contact, and the remaining remote parts will shield the generated magnetic field under the action of the magnetic shielding ring 28 to avoid affecting the operation of the pressure measurement component. When the clamp ammeter moving contact coil circuit is tested, the power supply component 22 is started, the positive terminal of the power supply component 22 is electrically connected to one end of the wide guide plate 23, and the other end of the wide guide plate 23 is electrically connected to the negative terminal of the power supply component 22 through a wire, so that the wide guide plate 23 is placed in the return circuit formed by the power supply component 22, and the steering conductor 27 is powered by the concentrated guide column 26 to generate the circuit. The direction of the circuit magnetic field generated by the steering conductor 27 is annular and surrounds the outer wall of the steering conductor 27, and will go along the moving contact and the static contact on the clamp ammeter. The steering conductor 27 is far away from the wide guide plate 23, and its magnetic field has an impact on the wide guide plate. The influence of 23 is small, and its magnetic field is located obliquely above the wide guide plate 23. Under the action of the magnetic shielding cover 29 arranged obliquely above, its influence on the magnetic field of the wide guide plate 23 is further reduced and can be ignored. The coil wound on the moving contact of the clamp ammeter generates an induced current through the induced magnetic field. At this time, the current on the coil will also generate a magnetic field. The direction of this magnetic field runs through the axis of the coil and is arranged in a ring array. Then, the moving charges on the wide guide plate 23 are affected by the magnetic field generated by the coil at the adjacent position, and move and converge on the pressure difference rod 24 on one side of the wide guide plate 23 under the action of the Lorentz force (the Lorentz force refers to the force exerted on the moving charge in the magnetic field, that is, the force exerted by the magnetic field on the moving charge), so that a potential difference appears at the position of the two pressure difference rods 24 on the wide guide plate 23, which is sensed by the voltage sensor 25 and transmitted through a digital signal;

[0047] The above advantages are as follows: in this way, the change of the mobile charge on the wide guide plate 23 can be used to determine whether the coil on the moving contact of the clamp ammeter is operating normally according to whether its voltage change is synchronized with the AC voltage change on the steering conductor 27, and the detection is repeated when the coil welding line is pulled to explore the coil operation state in this state, making the detection more comprehensive and reliable, and also facilitating the detection of different core parts separately before packaging, and timely discovering unqualified parts for rapid rework;

[0048] When the present invention is used, the clamp ammeter to be tested without a packaged shell is opened, the jaws are passed through the hydraulic rod 9 and the steering conductor 27, so that the clamp ammeter to be tested is placed in a vertical state into the concave surface of the positioning concave plate 2. After being placed, its jaws are positioned upward, and then the two electric push rods 4 on the positioning concave plate 2 are started to move the two test power supply groups 6 into the battery compartment of the unpackaged clamp ammeter. The battery compartment of the unpackaged clamp ammeter is electrically connected to the circuit board through a wire welding (see the attached manual for details). Fig.11 , is the state that the coil in the moving contact is not welded to the circuit board, and there is a groove on the package shell of the clamp ammeter that communicates with the battery compartment. Usually, the battery is installed after the package shell is assembled). After moving into the battery compartment, the power supply to the limit electromagnetic plate 5 is disconnected, so that the limit electromagnetic plate 5 loses its magnetism and does not continue to be magnetically attracted with the limit permanent magnet plate 7. Then, the two test power supply groups 6 will be respectively bounced up and down under the action of the unfolding spring rod 8, and press against the power connection part in the battery compartment to realize the power supply of the ammeter in the clamp ammeter. The unpackaged clamp ammeter is limited by the friction of the concave surface of the positioning concave plate 2 and the extrusion of the two test power supply groups 6. In this way, the two unfolded test power supply groups 6 can be used to limit the clamp ammeter to the concave surface of the positioning concave plate 2, and realize the power supply of the internal circuit board, so that the internal circuit board of the circuit board can perform data processing and function execution, which is convenient for the subsequent DC circuit test to determine whether the Hall element has voltage generated and acts on the circuit board circuit;

[0049] During the continuous detection process, the hydraulic rod 9 is started to pull the two adjusting racks 20 toward one side of the positioning concave plate 2 through the U-shaped rod, and the movement of the adjusting rack 20 will drive the meshing adjusting gear 12 to rotate, and the rotation of the adjusting gear 12 will drive the T-shaped slide plate 13 to deflect downward together. The deflection of the T-shaped slide plate 13 will drive the regulating pillar 15 and the wire holding semi-ring 18 to deflect together through the T-shaped slide plate 14. After the deflection reaches the angle where the two wire holding semi-rings 18 can clamp the circuit welded between the coil on the moving contact and the internal circuit board, the pneumatic push rod 10 fixed on the fixed end of the hydraulic rod 9 is started to slowly recover, so that the two deflected wire holding semi-rings 18 are close to the circuit welded between the coil on the moving contact and the internal circuit board. After the movement stops, the circuit is placed in the two wire holding semi-rings 18, and then the power to the two electromagnetic columns 17 is disconnected, so that the two adjacent magnetic poles with the same power state are The magnetic repulsion between the magnetic columns 17 disappears, so that the two wire holding half rings 18 are closed under the action of the adjusting spring rod 19, and the regulating pillar 15 keeps synchronous movement by sliding between the T-shaped slide plate 13 and the T-shaped slide plate 14, and then the pneumatic push rod 10 is controlled to be pushed out, so that the closed wire holding half ring 18 drives the line away from the clamp ammeter. With continuous pulling, the line will be placed at the closing of the two wire holding half rings 18. If the soldering strength between the line and the circuit board is sufficient, it will be detached at the closing position. If the strength is insufficient, the line will fall off at the soldering position with the circuit board. When the clamp ammeter is subsequently removed, it is only necessary to observe whether the line welding position falls off to judge the welding strength of the line. In this way, the two closed wire holding half rings 18 can be used to apply a certain pulling force to the welding line, so as to facilitate the detection of whether the line will break or fall off from the welding position under this pulling state, so that the produced clamp ammeter has better durability.

[0050] When installing and testing the clamp ammeter, the steering conductor 27 is placed between the moving contact and the stationary contact. The remaining remote parts will shield the magnetic field generated by the magnetic shielding ring 28 to avoid affecting the operation of the pressure measuring component. When testing the moving contact coil circuit of the clamp ammeter, refer to the instructions for the Fig.10, start the power supply 22, the positive terminal of the power supply 22 is electrically connected to one end of the wide guide plate 23, and the other end of the wide guide plate 23 is electrically connected to the negative terminal of the power supply 22 through a wire, so that the wide guide plate 23 is placed in the return circuit formed by the power supply 22, and the steering conductor 27 supplies power to the generating circuit through the concentrated guide column 26. The direction of the magnetic field generated by the steering conductor 27 is annular and surrounds the outer wall of the steering conductor 27, and will follow the moving contact and the static contact on the clamp ammeter. The steering conductor 27 is far away from the wide guide plate 23, and its magnetic field has little effect on the wide guide plate 23, and its magnetic field is located obliquely above the wide guide plate 23. Under the action of the magnetic shielding cover 29 arranged obliquely above, its effect on the magnetic field of the wide guide plate 23 is further reduced and can be ignored. The coil wound on the moving contact of the clamp ammeter generates an induced current through the induced magnetic field. At this time, the current on the coil will also generate a magnetic field. The direction of this magnetic field runs through the axis of the coil. When the annular array is set, the moving charges on the wide guide plate 23 are affected by the magnetic field generated by the coils at adjacent positions, and move and converge on the pressure difference rod 24 on one side of the wide guide plate 23 under the action of the Lorentz force (the Lorentz force refers to the force exerted on the moving charges in the magnetic field, that is, the force exerted by the magnetic field on the moving charges), so that an electric potential difference appears at the positions of the two pressure difference rods 24 on the wide guide plate 23, which is sensed by the voltage sensor 25 and transmitted through digital signals. In this way, the change of the moving charges on the wide guide plate 23 can be used to determine whether the coil on the moving contact of the clamp ammeter is operating normally according to whether its voltage change is synchronized with the AC voltage change on the steering conductor 27, and the detection is repeated when the coil welding line is pulled to explore the coil operation state in this state, so that the detection is more comprehensive and reliable, and it is also convenient to detect different core parts separately before packaging, and to find unqualified parts in time for rapid rework.

[0051] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A testing device for manufacturing an ammeter, comprising a base (1) and a plurality of positioning recessed plates (2), characterized in that: The side wall of the positioning concave plate (2) is connected to a movable plate via two electric push rods (4); the end of the movable plate is connected to two test power supply groups (6) for detecting Hall elements via a magnetic limit assembly; the top of the positioning concave plate (2) is connected to a hydraulic rod (9) via a fixed plate; the outer side wall of the fixed end of the hydraulic rod (9) is fixedly connected to a U-shaped fixed plate (11) via a pneumatic push rod (10); the inner side wall of the U-shaped fixed plate (11) is connected to two T-shaped slide plates (14) via an adjustment assembly; the tops of the two T-shaped slide plates (14) are respectively connected to a suction assembly for adjusting the limit position of the welding line via two adjustment pillars (15); the ends of the adjustment pillars (15) are connected to a wire holding half ring (18); The top of the base (1) is connected to a central guide column (26) via a rotating seat (3); the top of the central guide column (26) is connected to a plurality of steering conductors (27); the plurality of steering conductors (27) are respectively arranged directly above a plurality of positioning concave plates (2); a vertical panel (21) is arranged above the positioning concave plates (2); the vertical panel (21) is connected to a pressure measurement assembly via a power supply unit (22); The magnetic limit assembly is composed of a limit electromagnetic plate (5) and a limit permanent magnetic plate (7); the output end of the electric push rod (4) is in a right-angle rod state; the output end of the electric push rod (4) is fixedly connected to the side wall of the limit electromagnetic plate (5) via a movable plate; the bottom end of the limit electromagnetic plate (5) is fixedly connected to a test power supply group (6) located below; the top end of the limit permanent magnetic plate (7) is fixedly connected to the test power supply group (6) located above; and the two test power supply groups (6) are electrically connected via two unfolding spring rods (8).

2. A test device for manufacturing an ammeter according to claim 1, characterized in that: The top end of the base (1) is rotatably connected to the bottom end of the rotating seat (3), the top end of the rotating seat (3) is respectively fixedly connected to the bottom ends of a plurality of positioning concave plates (2), and the top end of the rotating seat (3) is fixedly connected to the bottom end of the central guide column (26).

3. The testing device for manufacturing an ammeter according to claim 1, characterized in that: The adjustment assembly is composed of two adjustment gears (12) and a T-shaped slide plate (13); the output end of the hydraulic rod (9) is fixedly connected to two adjustment racks (20) via a U-shaped rod; the adjustment gear (12) is meshed with the adjustment racks (20); and the inner side wall of the U-shaped fixed plate (11) is rotatably connected to the end of the T-shaped slide plate (13) via the adjustment gear (12).

4. A test device for manufacturing an ammeter according to claim 3, characterized in that: The inner side wall of the T-shaped slide plate (13) is slidably connected to the regulating pillar (15) via the T-shaped slide plate (14); the end of the regulating pillar (15) is fixedly connected to the end side wall of the wire holding half ring (18); and the two wire holding half rings (18) are slidably connected to each other via an adjusting spring rod (19).

5. The testing device for manufacturing an ammeter according to claim 1, characterized in that: The suction assembly consists of a limit shaft (16) and two electromagnetic columns (17); the side wall of the regulating column (15) is slidably connected to the side wall of the limit shaft (16) via a mounting plate; the side wall of the regulating column (15) is fixedly connected to the electromagnetic column (17) via the mounting plate; and the inner side wall of the electromagnetic column (17) is slidably connected to the side wall of the limit shaft (16).

6. The testing device for manufacturing an ammeter according to claim 1, characterized in that: The top end of the positioning recessed plate (2) is fixedly connected to the side wall of the vertical panel (21) via a fixing plate; the vertical panel (21) is located on one side of the fixing plate; and the side wall of the vertical panel (21) is fixedly connected to the side wall of the power supply unit (22).

7. The testing device for manufacturing an ammeter according to claim 1, characterized in that: The pressure measurement assembly is composed of a wide guide plate (23) and a voltage sensor (25); the output end of the power supply unit (22) is electrically connected to the wide guide plate (23); the upper and lower side walls of the wide guide plate (23) are electrically connected to the voltage sensor (25) via two pressure difference rods (24) respectively; and a magnetic shielding cover (29) is fixedly connected to the top end of the vertical plate (21) located on the side of the turning conductor (27).

8. The testing device for manufacturing an ammeter according to claim 1, characterized in that: The top end of the centralized guide column (26) is electrically connected to the bottom ends of a plurality of steering conductors (27); the other end of the steering conductor (27) is arranged above the hydraulic rod (9); and magnetic shielding ferrules (28) are arranged on the side walls at both ends of the steering conductor (27).

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