A transformer test tool for single-phase smart meters

Abstract

The utility model relates to a kind of transformer test tool for single-phase intelligent electric meter in the field of test tool, including operation platform and metal probe fixedly installed on operation platform by base plate, the operation platform is located above metal probe and is pre-set with the load plate of pressure down, the load plate is opened with the through-hole corresponding with metal probe, further include: warning device, set up on the mounting base frame of the operation platform, which is integrally formed with operation platform;The linkage design of the present application through touch unit and warning device can accurately capture the contact node of probe and pin, avoid the problem of excessive pressure caused by judgment delay when artificial observation, both protect metal probe and transformer pin from being damaged, reduce test error, improve the efficiency and accuracy of test operation, and the touch unit adopts mechanical contact type on-off design, simple structure, response sensitive, can realize the real-time linkage of probe contact and warning, ensure the accurate timing of warning.

Description

Technical Field

[0001] This utility model relates to a transformer testing fixture for single-phase smart meters, and more particularly to a transformer testing fixture for single-phase smart meters applied in the field of testing fixtures. Background Technology

[0002] In the manufacturing process of single-phase smart meters, the transformer, as the core component for energy metering and voltage conversion, directly determines the metering accuracy and operational stability of the meter through its electrical performance. Therefore, before the transformer leaves the factory, it is necessary to test its key parameters such as insulation performance, turns ratio, and load loss using a special testing fixture. Reliable contact between the metal probe and the transformer pins in the testing fixture is a prerequisite for ensuring the accuracy of the test data.

[0003] Currently, the industry generally uses manual or semi-automatic pressure testing fixtures. By placing the transformer on a load-bearing structure and applying pressure, the metal probes are brought into contact with the transformer pins, thereby completing the electrical parameter test.

[0004] However, in practical applications, existing testing fixtures lack precise contact detection and warning mechanisms. Operators mainly rely on visual observation or experience to judge the contact state between the metal probe and the pin. This can easily lead to excessive pressure due to delayed judgment or improper control of the pressure applied. This situation may not only cause the metal probe to bend and deform, or damage the transformer pin, increasing the maintenance cost of the fixture and product loss, but also affect the stability of the test signal due to poor contact between the probe and the pin or excessive compression, resulting in increased test errors and reduced reliability of the test results. Therefore, this utility model is proposed. Utility Model Content

[0005] The technical problem that this utility model aims to solve is that existing testing fixtures lack accurate contact detection and warning mechanisms. Operators rely on visual observation or experience to judge the contact state between the probe and the pin, which can easily lead to excessive pressure due to judgment delays or improper pressure application. This can damage the probe and pin, increase cost losses, affect the stability of the test signal, increase errors, and reduce the reliability of the results.

[0006] To address the aforementioned problems, this utility model provides a transformer testing fixture for single-phase smart meters, comprising an operating platform and a metal probe fixedly mounted on the operating platform via a base plate. The operating platform has a pre-set support plate above the metal probe, which is subject to downward pressure. The support plate has through holes corresponding to the metal probe. The fixture also includes: an alarm device mounted on a mounting base of the operating platform, which is integrally formed with the operating platform; and a touch control unit mounted on the operating platform. When the support plate is pressed downward, the transformer to be tested placed on the support plate moves downward synchronously. When the metal probe passes through the through hole and contacts the transformer's pins, the touch control unit triggers the alarm device to remind the operator to stop applying downward pressure.

[0007] As a further improvement of this application, a positioning groove is provided on the upper end surface of the bearing plate.

[0008] As a further improvement of this application, the positioning groove is provided in multiple sets, each set of the positioning groove is provided with multiple positioning grooves, and the multiple positioning grooves are equidistantly distributed on the operating table. The number of metal probes and through holes is the same as that of the positioning grooves, wherein the through holes are located inside the positioning grooves.

[0009] As a further improvement of this application, a cylinder is fixedly installed on the mounting base, and a pressure plate located above the bearing plate is fixedly connected to the telescopic end of the cylinder.

[0010] As another improvement of this application, guide rods are fixedly installed at both ends of the upper surface of the pressure plate, and the guide rods are slidably connected to the mounting base.

[0011] As a further improvement to this application, a sliding sleeve is fixedly installed in the cavity inside the operating table, and a sliding rod is slidably connected inside the sliding sleeve. One end of the sliding rod passes through the upper end of the operating table and is detachably connected to the substrate and the support plate. A spring is provided inside the sliding sleeve, with one end of the spring fixedly connected to the inner wall of the lower end of the sliding sleeve and the other end fixedly connected to the lower end of the sliding rod.

[0012] As a further improvement to this application, the touch unit includes a first conductive ring, a second conductive ring, and a battery. The first conductive ring is fixedly connected to the edge of the lower end of the slide rod, and the second conductive ring is fixedly connected to the edge of the inner wall of the lower end of the slide sleeve. The battery is disposed in the cavity inside the operating table, and the alarm is electrically connected to the battery through the first conductive ring and the second conductive ring.

[0013] As a further improvement to this application, a fixing ring is fixedly connected to the slide rod, the fixing ring abutting against the lower end face of the bearing plate, and a locking nut is threadedly connected to the upper end of the slide rod, the locking nut abutting against the upper end face of the bearing plate.

[0014] In summary, this application, through the linkage design of the touch unit and the alarm, can accurately capture the contact point between the probe and the pin, avoiding the problem of excessive pressure caused by judgment delay during manual observation. This not only protects the metal probe and transformer pin from damage, but also reduces test errors and improves the efficiency and accuracy of test operations.

[0015] The touch unit adopts a mechanical contact on / off design, which is simple in structure and highly responsive. It can realize real-time linkage between probe contact and warning, ensuring accurate warning timing.

[0016] The design of multiple sets of equidistant positioning slots and corresponding probes and through holes enables batch testing, increases the number and efficiency of single tests, and ensures that the pressure and test conditions of each transformer are consistent, thus improving the reliability of the test results.

[0017] The positioning slot limits the transformer, solves the slippage problem during pressure application, ensures accurate probe docking, reduces the test failure rate, and simplifies placement operations.

[0018] The detachable connection design of the bearing plate makes replacement convenient and quick without disassembling the entire tooling set, improving the adaptability to transformers of different specifications and reducing purchase costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of this application;

[0020] Figure 2 This is a cross-sectional view of the operating table, mounting base, and support plate according to the embodiments of this application;

[0021] Figure 3 This is a partial structural schematic diagram of an embodiment of this application;

[0022] Figure 4 This is a front view of the operating table, mounting frame, and support plate according to the embodiments of this application;

[0023] Figure 5 This is a schematic diagram showing the unfolded structure of the carrier plate, substrate, and metal probe according to an embodiment of this application;

[0024] Figure 6 This is a cross-sectional view of the sliding sleeve according to an embodiment of this application.

[0025] Explanation of the labels in the diagram:

[0026] 1. Operating table; 101. Mounting base; 102. Pressure plate; 103. Cylinder; 104. Guide rod; 2. Bearing plate; 201. Positioning groove; 202. Through hole; 203. Base plate; 204. Metal probe; 3. Slide rod; 301. Fixing ring; 302. Locking nut; 303. Sliding sleeve; 304. Spring; 4. Conductive ring one; 401. Conductive ring two; 402. Battery; 403. Warning device. Detailed Implementation

[0027] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0028] Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 The diagram shows a transformer testing fixture for a single-phase smart meter, comprising an operating platform 1 and a metal probe 204 fixedly mounted on the operating platform 1 via a base plate 203. A support plate 2, which is designed to be lowered under pressure, is positioned above the metal probe 204 on the operating platform 1. The support plate 2 has through holes 202 corresponding to the metal probe 204. The fixture also includes: an alarm 403 mounted on a mounting base 101 of the operating platform 1, which is integrally formed with the operating platform 1; and a touch unit mounted on the operating platform 1. When the support plate 2 is lowered under pressure, the transformer to be tested, placed on the support plate 2, moves downwards synchronously. When the metal probe 204 passes through the through hole 202 and contacts the transformer pins, the touch unit triggers the alarm 403 to activate, reminding the operator to stop applying downward pressure.

[0029] After the operator places the transformer to be tested on the support plate 2, they apply downward pressure to the support plate 2. The support plate 2 moves the transformer downward synchronously. When the metal probe 204 passes through the through hole 202 and contacts the transformer pin, the touch unit is triggered and controls the alarm 403 to work (such as an audible and visual prompt). During this process, the linkage design between the touch unit and the alarm 403 enables it to accurately capture the contact point between the probe and the pin, avoiding the problem of excessive pressure caused by judgment delay during manual observation. This not only protects the metal probe 204 and the transformer pin from damage, but also reduces test errors and significantly improves the efficiency and accuracy of the test operation.

[0030] Figure 1 As shown, a positioning groove 201 is provided on the upper end surface of the bearing plate 2, and the shape of the positioning groove 201 matches the bottom contour of the transformer to be tested.

[0031] When placing the transformer, its bottom is embedded in the positioning groove 201. The positioning groove 201 limits the transformer, preventing it from shifting during subsequent pressure application. This ensures that the metal probe 204 can accurately pass through the through hole 202 and connect with the transformer pins, thus solving the problem of the transformer easily slipping during pressure application. This further ensures the accuracy of the probe-pin contact, reduces the test failure rate caused by positional deviation, simplifies the placement action of the operator, and improves the ease of operation.

[0032] Figure 1 , Figure 2 , Figure 5 As shown, there are multiple sets of positioning slots 201, each set of positioning slots 201 has multiple slots, and the multiple positioning slots 201 are equidistantly distributed on the operating table 1. The number of metal probes 204 and through holes 202 are the same as the number of positioning slots 201, wherein the through holes 202 are located inside the positioning slots 201.

[0033] Operators can place multiple transformers simultaneously in multiple positioning slots 201. When pressure is applied, all transformers move down synchronously with the support plate 2. Since the metal probes 204 and through holes 202 correspond one-to-one with the positioning slots 201, the pins of multiple transformers can contact the corresponding probes simultaneously. After the touch unit is triggered, the alarm 403 uniformly prompts to stop applying pressure, realizing batch testing. This design increases the number of tests per session by several times, improving testing efficiency. At the same time, the equidistantly distributed structure ensures that the pressure and testing conditions borne by each transformer are consistent, improving the reliability of the test results.

[0034] Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a cylinder 103 is fixedly mounted on the mounting base 101, and a pressure plate 102 located above the bearing plate 2 is fixedly connected to the telescopic end of the cylinder 103.

[0035] When the cylinder 103 is activated, its telescopic end pushes the pressure plate 102 downward. After the pressure plate 102 contacts the bearing plate 2, it applies downward pressure. Compared with manual pressure application, the cylinder 103 can provide stable and uniform pressure, avoiding problems such as probe bending or transformer damage caused by fluctuations in pressure applied manually. At the same time, it reduces the labor intensity of operators, reduces the safety risks of manual operation, and makes the testing process more stable and safe. When the alarm 403 is working, the operator can stop the extension and retraction of the cylinder 103 to achieve precise pressure control.

[0036] Figure 1 , Figure 2 , Figure 3 As shown, guide rods 104 are fixedly installed at both ends of the upper surface of the pressure plate 102, and the guide rods 104 are slidably connected to the mounting base 101;

[0037] When the cylinder 103 drives the pressure plate 102 to move up and down, the guide rod 104 slides synchronously along the sliding hole of the mounting base 101, forming a rigid guide for the movement direction of the pressure plate 102. This design effectively prevents the pressure plate 102 from tilting or shifting due to uneven force on one side, ensuring that the pressure is evenly transmitted to each area of ​​the bearing plate 2, further guaranteeing the smoothness of the transformer's downward movement and the accuracy of the probe contact.

[0038] Figure 1 , Figure 4 , Figure 6 As shown, a sliding sleeve 303 is fixedly installed in the cavity inside the operating table 1. A sliding rod 3 is slidably connected inside the sliding sleeve 303. One end of the sliding rod 3 passes through the upper end of the operating table 1 and is detachably connected to the base plate 203. A spring 304 is provided inside the sliding sleeve 303. One end of the spring 304 is fixedly connected to the inner wall of the lower end of the sliding sleeve 303, and the other end is fixedly connected to the lower end of the sliding rod 3.

[0039] When the bearing plate 2 is pressed, it drives the slide rod 3 to slide downward along the sliding sleeve 303, and the spring 304 is compressed. After the test is completed, the pressure is released, and the elastic restoring force of the spring 304 pushes the slide rod 3 to move upward, causing the bearing plate 2 to automatically reset. The cooperation between the slide rod 3 and the sliding sleeve 303 ensures the straightness of the up and down movement of the bearing plate 2 and avoids deviation. The reset function of the spring 304 does not require manual intervention, which simplifies the test process and improves the automation level of the equipment. At the same time, the spring 304 plays a buffering role during the compression process, reducing the impact of pressure on the operating table 1 and the base plate 203.

[0040] Figure 1 , Figure 2 , Figure 4 , Figure 6 As shown, the touch unit includes a first conductive ring 4, a second conductive ring 401, and a battery 402. The first conductive ring 4 is fixedly connected to the lower edge of the slide bar 3, the second conductive ring 401 is fixedly connected to the lower inner wall edge of the slide sleeve 303, and the battery 402 is disposed in the cavity inside the operating table 1. The alarm 403 is electrically connected to the battery 402 through the first conductive ring 4 and the second conductive ring 401.

[0041] The carrier plate 2 moves down, causing the slide bar 3 and conductive ring 4 to move down synchronously. When the metal probe 204 just touches the transformer pin, conductive ring 4 and conductive ring 401 make precise contact, so that the alarm 403 and the battery 402 form a conductive circuit. The alarm 403 works to prompt the stop of pressure application. This touch unit adopts a mechanical contact switching design, which is simple in structure and sensitive in response. It can realize the real-time linkage between probe contact and alarm, ensuring accurate alarm timing.

[0042] The battery 402 power supply reduces the entanglement and interference of external lines, and improves the reliability of the equipment in complex workshop environments. After the pressure is released, the slide bar 3 resets, causing the conductive ring to separate, the circuit to break, and the alarm 403 to stop working automatically without any additional operation.

[0043] Figure 1 , Figure 2 , Figure 4 , Figure 6 As shown, a fixing ring 301 is fixedly connected to the slide rod 3, and the fixing ring 301 abuts against the lower end face of the bearing plate 2. A locking nut 302 is threadedly connected to the upper end of the slide rod 3, and the locking nut 302 abuts against the upper end face of the bearing plate 2.

[0044] When installing the bearing plate 2, slide it onto the slide rod 3 and make its lower end face fit against the fixing ring 301. Tighten the locking nut 302 to fix the bearing plate 2 by clamping force. When different models of transformers need to be tested, simply loosen the locking nut 302 to remove the old bearing plate 2, replace it with a bearing plate 2 that fits the new positioning groove 201, and then tighten it again. This detachable structure makes it convenient and quick to replace the bearing plate 2 without disassembling the entire tooling, which improves the equipment's adaptability to transformers of different specifications and enhances its versatility and flexibility.

[0045] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this utility model.

Claims

1. A transformer testing fixture for a single-phase smart meter, comprising an operating table (1) and a metal probe (204) fixedly mounted on the operating table (1) via a base plate (203), wherein the operating table (1) has a pressure-reducing support plate (2) pre-set above the metal probe (204), and the support plate (2) has a through hole (202) corresponding to the metal probe (204), characterized in that, Also includes: The warning device (403) is installed on the mounting base (101) of the operating table (1), which is integrally formed with the operating table (1); The touch unit is located on the operating table (1). When the support plate (2) is pressed down, the transformer to be tested placed on the support plate (2) moves down synchronously. When the metal probe (204) passes through the through hole (202) and contacts the pin of the transformer, the touch unit triggers the control alarm (403) to work, so as to remind the operator to stop applying downward pressure.

2. The transformer testing fixture for a single-phase smart meter according to claim 1, characterized in that: The upper end face of the bearing plate (2) is provided with a positioning groove (201).

3. The transformer testing fixture for a single-phase smart meter according to claim 2, characterized in that: The positioning groove (201) is provided in multiple sets, and each set of the positioning groove (201) is provided with multiple, and the multiple positioning grooves (201) are equidistantly distributed on the operating table (1). The number of metal probes (204) and through holes (202) is the same as that of the positioning grooves (201), wherein the through holes (202) are located inside the positioning grooves (201).

4. The transformer testing fixture for a single-phase smart meter according to claim 1, characterized in that: A cylinder (103) is fixedly installed on the mounting base (101), and a pressure plate (102) located above the bearing plate (2) is fixedly connected to the telescopic end of the cylinder (103).

5. The transformer testing fixture for a single-phase smart meter according to claim 4, characterized in that: Guide rods (104) are fixedly installed at both ends of the upper surface of the pressure plate (102), and the guide rods (104) are slidably connected to the mounting base (101).

6. The transformer testing fixture for a single-phase smart meter according to claim 1, characterized in that: A sliding sleeve (303) is fixedly installed in the cavity inside the operating table (1). A sliding rod (3) is slidably connected inside the sliding sleeve (303). One end of the sliding rod (3) passes through the upper end of the operating table (1), passes through the base plate (203), and is detachably connected to the support plate (2). A spring (304) is provided inside the sliding sleeve (303). One end of the spring (304) is fixedly connected to the inner wall of the lower end of the sliding sleeve (303), and the other end is fixedly connected to the lower end of the sliding rod (3).

7. The transformer testing fixture for a single-phase smart meter according to claim 6, characterized in that: The touch unit includes a first conductive ring (4), a second conductive ring (401), and a battery (402). The first conductive ring (4) is fixedly connected to the edge of the lower end of the slide rod (3). The second conductive ring (401) is fixedly connected to the edge of the inner wall of the lower end of the slide sleeve (303). The battery (402) is installed in the cavity inside the operating table (1). The alarm (403) is electrically connected to the battery (402) through the first conductive ring (4) and the second conductive ring (401).

8. The transformer testing fixture for a single-phase smart meter according to claim 6, characterized in that: A fixing ring (301) is fixedly connected to the slide rod (3), the fixing ring (301) abuts against the lower end face of the bearing plate (2), and a locking nut (302) is threadedly connected to the upper end of the slide rod (3), the locking nut (302) abuts against the upper end face of the bearing plate (2).

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