A temperature measuring device for an electric energy meter

Abstract

The present application relates to the technical field of electric energy meter detection, and discloses a kind of electric energy meter temperature measuring device, lift the end of temperature guide plate by lifting rod subassembly control and lift rod is pivot to lift control, the different combination arrangement of push plate groove and receive plate groove always keeps the differentiated control of multiple lifting rods, this ensures that temperature guide plate is lifted in any orientation under preset program, only the temperature guide plate that is lifted can be contacted with electric energy meter terminal and heat transfer, so that the temperature guide plate in different positions can be independently controlled as needed, realize the local heating simulation of different parts of electric energy meter terminal. The existing electric energy meter temperature measuring device is difficult to simulate the actual load heating condition of terminal, which leads to the deviation between temperature monitoring function detection and actual operation scene, so that the problem of false alarm or false negative is not easy to be identified.

Description

Technical Field

[0001] This invention relates to the field of electricity meter testing technology, specifically to an electricity meter temperature measuring device. Background Technology

[0002] The electricity meter temperature measuring device is a professional testing equipment used to detect and verify the temperature monitoring function of the electricity meter's terminals. This device simulates temperature changes at the electricity meter's terminals through a built-in heating unit, testing whether the electricity meter can correctly perform temperature warning reporting, event recording and storage, and protection actions (such as tripping) according to State Grid technical specifications when the terminal temperature is abnormal.

[0003] However, existing temperature measurement devices for electricity meters have significant technical limitations. Current detection methods typically use an external power source to power the meter and an external heating unit to heat the terminals as a whole, rather than utilizing the heat generated by the current flowing through the terminals themselves to simulate actual operating conditions. This detection method differs fundamentally from real-world scenarios: in actual operation, the terminals of an electricity meter are in a current-carrying state, and overheating is mainly caused by poor contact (such as loosening, oxidation, or corrosion), leading to increased contact resistance and resulting in localized overheating. Because the temperature field distribution characteristics of overall heating and localized overheating are inconsistent, existing detection methods cannot accurately reproduce the thermal characteristics under actual fault conditions, resulting in potential response lag or missed alarms in the electricity meter's temperature monitoring function even after calibration.

[0004] More importantly, the temperature threshold based on external overall heating calibration does not match the actual current heating characteristics, making it difficult to effectively identify potential defects such as false alarms or missed alarms in the power meter when the terminals are locally heated, which seriously affects the reliability and accuracy of the temperature monitoring function. Summary of the Invention

[0005] The purpose of this invention is to provide a temperature measuring device for electricity meters, which solves the problem that existing temperature measuring devices for electricity meters are unable to simulate the actual current-carrying and heating conditions of the terminals, resulting in a deviation between the temperature monitoring function and the actual operating scenario, making it difficult to identify potential false alarms or missed alarms.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a temperature measuring device for an electricity meter, comprising: The machine platform has a temperature control unit on one side, and multiple meter connection mechanisms are provided on the upper side of the temperature control unit. Each of the multiple meter connection mechanisms corresponds to a terminal of an electricity meter. The receiving mechanism includes a fixed cover fixedly mounted on the upper side of the temperature control unit. A power supply pin is fixedly installed inside the fixed cover. Multiple temperature-conducting plates are circumferentially distributed on the outer surface of the power supply pin. A heating wire for heating the multiple temperature-conducting plates is also provided inside the fixed cover, as well as multiple lifting rods. The multiple lifting rods are correspondingly arranged on the lower side of the multiple temperature-conducting plates. A lifting plate assembly is also provided outside the fixed cover. The lifting plate assembly pushes the lower end of the temperature-conducting plates through the lifting rods, controlling the multiple temperature-conducting plates to rise according to a preset program.

[0007] As a further description of the above technical solution: the lifting rod is rotatably mounted on the lower side of the fixed cover, one end of the lifting rod is movably pressed against the lower surface of the temperature guiding plate, and the other end extends out of the outer surface of the fixed cover. The outer surface of the fixed cover is also provided with a tension spring to pull one end of the lifting rod.

[0008] As a further description of the above technical solution: the lifting plate assembly includes a control cover, and the lower surface of the control cover is provided with a plurality of control grooves, the control grooves including a pushing plate groove and a retracting plate groove; As the control cover moves downward, the push plate groove above the corresponding lifting rod can push one end of the lifting rod downward, causing the other end of the lifting rod to push the corresponding temperature guide plate upward, while the retracting plate groove above the corresponding lifting rod does not contact the lifting rod.

[0009] As a further description of the above technical solution: the multiple control slots on the upper side of the multiple lifting rods are grouped together, and when the control cover is in the lifting state, the group of control slots can control the multiple lifting rods to lift according to a preset program.

[0010] As a further description of the above technical solution: the lower side of the control cover is provided with multiple sets of control slots, which are composed of push plate slots and retracting plate slots arranged in different combinations.

[0011] As a further description of the above technical solution: an annular guide rail is provided on the inner side of the control cover, the control cover is rotatably mounted on the outer side of the annular guide rail, a gear ring is provided on the upper side of the gear ring, a servo motor is fixedly provided on the upper side of the annular guide rail, and a gear that meshes with the gear ring is provided at the output end of the servo motor. A pair of lead screws and shafts are symmetrically arranged on the inner side of the annular guide rail. The lower end of the pair of lead screws is provided with a belt drive structure. The lead screws are threadedly connected to the annular guide rail, and the shafts are slidably connected to the annular guide rail. A servo motor is provided on the upper side of the lead screws to drive their rotation.

[0012] As a further description of the above technical solution: a heat insulation sleeve is provided on the outer surface of the power supply pin, and multiple temperature-conducting plates are distributed in a ring on the outer surface of the heat insulation sleeve. The upper end of the heat insulation sleeve is provided with a blocking edge to limit the rising height of the temperature-conducting plates.

[0013] As a further description of the above technical solution: a heat insulation cover is fitted on the outer surface of the plurality of heat-conducting plates, the heat insulation cover is movably assembled on the upper end of the fixed cover, a push spring is provided on the inner side of the fixed cover to push the heat insulation cover up, and the upper end of the heat insulation cover is provided with a push cover edge with a diameter larger than the diameter of the electricity meter terminal socket.

[0014] As a further description of the above technical solution: the side of the machine is also provided with a meter hanging mechanism, which is set above the temperature control unit. The electricity meter is fixed on the meter hanging mechanism and controlled by the meter hanging mechanism so that the terminals of the electricity meter are accurately connected to the meter connecting mechanism.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. The lifting plate assembly controls the lifting rod to push the lower end of the temperature-conducting plate. The lifting rod is used as a fulcrum for lifting and lowering control. Different combinations of the push plate slot and the retracting plate slot maintain differentiated control over multiple lifting rods. This ensures that when the temperature-conducting plate is lifted in any position under the preset program, only the lifted temperature-conducting plate can contact the electricity meter terminal for heat transfer. This ensures that the temperature-conducting plates in different positions can be independently controlled as needed, realizing the simulation of local heating of different parts of the electricity meter terminal. In addition, multiple sets of control slots are composed of push plate slots and retracting plate slots arranged in different combinations, effectively realizing the lifting control of single or multiple temperature-conducting plates, avoiding the limitation of only being able to heat the whole, thereby improving the comprehensiveness and flexibility of the device in simulating the local heating of the terminal.

[0016] 2. The annular guide rail in the control cover is connected to the fixed cover via a lead screw and a shaft. Servo motor one controls the rotation of the control cover, and servo motor two controls its lifting. The lead screw is threadedly connected to the annular guide rail to achieve lifting, while the shaft is slidably connected to the annular guide rail to stabilize the lifting state and prevent the annular guide rail from shifting during lifting, thus ensuring the alignment accuracy between the control slot and the lifting rod. At the same time, the tension spring normally pulls one end of the lifting rod, so that the end of the lifting rod not pushed by the push plate slot, corresponding to the temperature guide plate, is on the lower side, preventing the temperature guide plate from being lifted and avoiding contact between the unselected temperature guide plate and the energy meter terminal, thereby achieving precise program control of the temperature guide plate lifting. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the temperature control unit and gauge rod mechanism of the present invention; Figure 3 This is a schematic diagram of the insert rod mechanism of the present invention; Figure 4 This is a schematic cross-sectional view of the insert rod mechanism of the present invention; Figure 5 This is a schematic diagram of the disassembled structure of the temperature-conducting plate and power supply pin of the present invention; Figure 6 This is a schematic diagram of the lifting plate assembly structure of the present invention; Figure 7 This is a schematic diagram of the temperature-conducting plate of the insert bar mechanism of the present invention in a state of partial lifting; Figure 8 This is a schematic diagram of the existing electricity meter structure.

[0018] In the diagram: 10. Machine base; 20. Meter hanging mechanism; 30. Temperature control unit; 40. Meter insertion rod mechanism; 41. Fixing cover; 42. Temperature guide plate; 43. Power supply pin; 431. Heat insulation sleeve; 432. Blocking edge; 44. Heating wire; 45. Lifting rod; 451. Tension spring; 46. Lifting plate assembly; 461. Control cover; 462. Gear ring; 463. Circular guide rail; 464. Servo motor one; 465. Lead screw; 466. Shaft; 467. Push plate groove; 468. Retracting plate groove; 469. Servo motor two; 47. Heat insulation cover; 471. Push cover edge; 472. Push spring. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Combination Figures 1 to 8 A temperature measuring device for an electricity meter, comprising: The machine 10 has a temperature control unit 30 on one side. The temperature control unit 30 has multiple meter connection mechanisms 40 on its upper side. Each of the multiple meter connection mechanisms 40 corresponds to a terminal of the electricity meter. The temperature control unit 30 is controlled by an external program, such as a CPU, to control the heating temperature of the electricity meter by the meter connection mechanisms 40. The meter connection mechanism 40 includes a fixed cover 41 fixedly mounted on the upper side of the temperature control unit 30. A power supply pin 43 is fixedly provided inside the fixed cover 41. When the power supply pin 43 is inserted into the inner side of the terminal of the energy meter, it can make conductive contact with the terminal. Multiple temperature-conducting plates 42 are distributed circumferentially on the outer surface of the power supply pin 43. When the temperature-conducting plates 42 are inserted into the inner side of the terminal of the energy meter, they can fit against the inner wall of the terminal. The fixed cover 41 is also provided with heating wires 44 for heating the multiple temperature-conducting plates 42, as well as multiple lifting rods 45. After the temperature-conducting plates 42 are heated by the heating wires 44, they can transfer the temperature to the surface in contact with the terminal inside the energy meter. The multiple lifting rods 45 are correspondingly arranged on the lower side of the multiple temperature-conducting plates 42. The fixed cover 41 is also provided with a lifting plate assembly 46. The lifting plate assembly 46 pushes the lower end of the temperature-conducting plates 42 through the lifting rods 45, controlling the multiple temperature-conducting plates 42 to rise according to a preset program. Specifically, multiple temperature-conducting plates 42 are heated by heating wires 44, enabling the temperature-conducting plates 42 to detect the temperature required by the electricity meter. Subsequently, under the control of the lifting rod 45 by the lifting plate assembly 46, part of the temperature-conducting plates 42 are lifted. Only the lifted temperature-conducting plates 42 can contact the electricity meter terminals. By lifting the temperature-conducting plates 42 at different positions, different parts of the electricity meter terminals can be locally heated. The power supply needle 43 also supplies power to the electricity meter through the terminals, simulating the situation where the terminals are in a current-carrying state and the terminals are locally overheated. Then, based on the data fed back by the electricity meter itself and the corresponding response capability, it can be detected whether the electricity meter meets the specifications. Combination Figure 4 and Figure 7 The lifting rod 45 is rotatably mounted on the lower side of the fixed cover 41. One end of the lifting rod 45 movably abuts against the lower surface of the temperature-conducting plate 42, and the other end extends out of the outer surface of the fixed cover 41. The outer surface of the fixed cover 41 is also provided with a tension spring 451 that pulls one end of the lifting rod 45. Under normal conditions, the tension spring 451 pulls one end of the lifting rod 45, so that the end of the lifting rod 45 corresponding to the temperature-conducting plate 42 is on the lower side. At this time, the temperature-conducting plate 42 is not lifted, and the unlifted temperature-conducting plate 42 will not contact the terminals of the energy meter.

[0021] Combination Figures 3 to 6 The lifting plate assembly 46 includes a control cover 461, and the lower surface of the control cover 461 is provided with a plurality of control grooves, including a push plate groove 467 and a retracting plate groove 468. As the control cover 461 moves downward, the push plate groove 467 above the corresponding lifting rod 45 can push one end of the lifting rod 45 downward, causing the other end of the lifting rod 45 to push the corresponding temperature-conducting plate 42 upward, while the plate-receiving groove 468 above the corresponding lifting rod 45 does not contact the lifting rod 45.

[0022] The multiple control slots on the upper side of the multiple lifting rods 45 are grouped together. When the control cover 461 is in the lifting state, the group of control slots can control the multiple lifting rods 45 to lift according to a preset program, and further control the corresponding temperature-conducting plate 42 to lift, so that the controlled temperature-conducting plate 42 comes into contact with the electricity meter.

[0023] Furthermore, the lower side of the control cover 461 is provided with multiple sets of control slots, which are formed by different combinations of push plate slots 467 and retractable plate slots 468. Figure 6 Different combinations of control slots can control the lifting of a single or multiple heat-conducting plates 42 in different positions, enabling the device to further simulate the local heating conditions of different parts of the terminal in all directions.

[0024] Combination Figure 6The control cover 461 has an inner ring guide rail 463. The control cover 461 is rotatably mounted on the outer side of the ring guide rail 463. The upper side of the control cover 461 has a gear ring 462. The upper side of the ring guide rail 463 has a servo motor 464 fixedly mounted. The output end of the servo motor 464 has a gear that meshes with the gear ring 462. The servo motor 464 controls the control cover 461 to rotate on the outer side of the ring guide rail 463 so that a set of control slots is rotated above the lifting rod 45, so that multiple heat conduction plates 42 are raised according to the arranged lifting program, so that the terminals of the control energy meter are simulated to be heated in a designated area. A pair of lead screws 465 and shafts 466 are symmetrically arranged on the inner side of the annular guide rail 463. The lower end of the lead screws 465 is provided with a belt drive structure. The lead screws 465 are threadedly connected to the annular guide rail 463, and the shafts 466 are slidably connected to the annular guide rail 463. A servo motor 469 is provided on the upper side of the lead screws 465 to drive their rotation. The two lead screws 465 rotate synchronously under the drive of the servo motor 469, thereby controlling the lifting and lowering of the control cover 461. This allows the control slot to push the lifting rod 45, while the shafts 466 can stabilize the lifting and lowering state of the annular guide rail 463, making its lifting and lowering control more stable.

[0025] Combination Figure 5 The outer surface of the power supply pin 43 is fitted with a heat insulation sleeve 431. The heat insulation sleeve 431 is preferably an insulating high-temperature resistant plastic coated with aerogel heat insulation material. Multiple temperature-conducting plates 42 are distributed in a ring on the outer surface of the heat insulation sleeve 431. In addition to preventing the high-temperature temperature-conducting plates 42 from baking the power supply pin 43, the heat insulation sleeve 431 also prevents the current of the power supply pin 43 from being transmitted to the energy meter through the temperature-conducting plates 42, and prevents the current from causing a secondary temperature rise in the temperature-conducting plates 42, which would affect the temperature control of the temperature-conducting plates 42. The upper end of the heat insulation sleeve 431 is provided with a blocking edge 432 to limit the rising height of the temperature-conducting plates 42, which keeps the multiple temperature-conducting plates 42 at the same height, so that the multiple raised temperature-conducting plates 42 can form good contact with the terminals of the energy meter.

[0026] Combination Figure 4A heat insulation cover 47 is fitted over the outer surface of the multiple heat-conducting plates 42. The heat insulation cover 47 is movably mounted on the upper end of the fixed cover 41. The inner side of the fixed cover 41 is provided with a push spring 472 to push the heat insulation cover 47 upward. The upper end of the heat insulation cover 47 is provided with a push cover edge 471 with a diameter larger than the diameter of the electricity meter terminal socket. The heat insulation cover 47 not only keeps the heat-conducting plates 42 warm and prevents heat loss, but also prevents workers from accidentally touching the heat-conducting plates 42 and causing burns. The push cover edge 471 allows the meter connecting mechanism 40 to be pushed against the lower side of the electricity meter when it is inserted into the electricity meter terminal socket. This push causes the heat-conducting plates 42 to be actively exposed, allowing the heat-conducting plates 42 to make smooth contact with the electricity meter terminals.

[0027] Combination Figure 1 The machine base 10 is also provided with a meter hanging mechanism 20 on its side. The meter hanging mechanism 20 is set above the temperature control unit 30. The electricity meter is fixed on the meter hanging mechanism 20 and controlled by the meter hanging mechanism 20. The meter hanging mechanism 20 includes a clamping fixture and a sliding table fixture. The clamping fixture is responsible for fixing and clamping the electricity meter, and the sliding table fixture is responsible for driving the clamping fixture holding the electricity meter to move towards the temperature control unit 30, so that the terminals of the electricity meter are accurately connected to the meter connecting mechanism 40.

[0028] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A temperature measuring device for an electricity meter, characterized in that, include: A machine (10) is provided with a temperature control unit (30) on one side of the machine (10). The temperature control unit (30) is provided with multiple meter connection mechanisms (40) on the upper side. The multiple meter connection mechanisms (40) correspond one-to-one with multiple terminals of the electricity meter. The meter receiving mechanism (40) includes a fixed cover (41) fixedly mounted on the upper side of the temperature control unit (30). A power supply pin (43) is fixedly arranged inside the fixed cover (41). Multiple temperature-conducting plates (42) are distributed circumferentially on the outer surface of the power supply pin (43). A heating wire (44) for heating multiple temperature-conducting plates (42) is also provided inside the fixed cover (41), as well as multiple lifting rods (45). Multiple lifting rods (45) are correspondingly arranged on the lower side of multiple temperature-conducting plates (42). A lifting plate assembly (46) is also provided on the outer side of the fixed cover (41). The lifting plate assembly (46) pushes the lower end of the temperature-conducting plate (42) through the lifting rods (45) to control the multiple temperature-conducting plates (42) to rise according to a preset program.

2. The temperature measuring device for an electricity meter according to claim 1, characterized in that: The lifting rod (45) is rotatably mounted on the lower side of the fixed cover (41). One end of the lifting rod (45) is movably pressed against the lower surface of the temperature guiding plate (42), and the other end extends out of the outer surface of the fixed cover (41). The outer surface of the fixed cover (41) is also provided with a tension spring (451) to pull one end of the lifting rod (45).

3. The temperature measuring device for an electricity meter according to claim 2, characterized in that: The lifting plate assembly (46) includes a control cover (461), and the lower surface of the control cover (461) is provided with a plurality of control grooves, including a push plate groove (467) and a retracting plate groove (468). As the control cover (461) moves downward, the push plate groove (467) above the corresponding lifting rod (45) can push one end of the lifting rod (45) downward, causing the other end of the lifting rod (45) to push the corresponding temperature-conducting plate (42) upward, while the plate-receiving groove (468) above the corresponding lifting rod (45) does not contact the lifting rod (45).

4. The temperature measuring device for an electricity meter according to claim 3, characterized in that: The multiple control slots on the upper side of the multiple lifting rods (45) are grouped together. When the control cover (461) is in the lifting state, the group of control slots can control the multiple lifting rods (45) to be lifted according to a preset program.

5. The temperature measuring device for an electricity meter according to claim 4, characterized in that: The control cover (461) is provided with multiple sets of control slots on its lower side. The multiple sets of control slots are composed of push plate slots (467) and retracting plate slots (468) arranged in different combinations.

6. The temperature measuring device for an electricity meter according to claim 5, characterized in that: The control cover (461) is provided with an annular guide rail (463) on its inner side. The control cover (461) is rotatably mounted on the outer side of the annular guide rail (463). The gear ring (462) is provided on its upper side. The annular guide rail (463) is fixedly provided with a servo motor (464). The output end of the servo motor (464) is provided with a gear that meshes with the gear ring (462). A pair of lead screws (465) and shafts (466) are symmetrically arranged on the inner side of the annular guide rail (463). The lower end of the pair of lead screws (465) is provided with a belt drive structure. The lead screws (465) are threadedly connected to the annular guide rail (463), and the shafts (466) are slidably connected to the annular guide rail (463). A second servo motor (469) for driving the rotation of the lead screws (465) is provided on the upper side of the lead screws (465).

7. The temperature measuring device for an electricity meter according to claim 1, characterized in that: The outer surface of the power supply pin (43) is covered with a heat insulation sleeve (431), and multiple heat-conducting plates (42) are distributed in a ring on the outer surface of the heat insulation sleeve (431). The upper end of the heat insulation sleeve (431) is provided with a blocking edge (432) to limit the rising height of the heat-conducting plates (42).

8. The temperature measuring device for an electricity meter according to claim 1, characterized in that: A heat insulation cover (47) is fitted on the outer surface of multiple heat-conducting plates (42). The heat insulation cover (47) is movably assembled on the upper end of the fixed cover (41). The inner side of the fixed cover (41) is provided with a push spring (472) to push the heat insulation cover (47) up. The upper end of the heat insulation cover (47) is provided with a push cover edge (471) with a diameter larger than the diameter of the electricity meter terminal socket.

9. The temperature measuring device for an electricity meter according to claim 1, characterized in that: The machine (10) is also provided with a meter hanging mechanism (20) on the side. The meter hanging mechanism (20) is set above the temperature control unit (30). The electricity meter is fixed on the meter hanging mechanism (20) and controlled by the meter hanging mechanism (20) so that the terminals of the electricity meter are accurately connected to the meter connecting mechanism (40).

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