Current measuring device at high temperature

Abstract

The utility model provides a current measuring device at high temperature. The current measuring device comprises an upper heating module, a connecting module, a measuring module, a lower heating module and an insulating plate, the upper heating module, the measuring module and the lower heating module are sequentially connected and fixed through the connecting module, and the insulating plate is arranged between the connecting module and the measuring module; heaters and thermocouples are arranged in the upper heating module and the lower heating module; and the thermocouples and the heaters are electrically connected with an upper computer and a temperature controller. According to the utility model, the upper heating module, the connecting module, the measuring module, the lower heating module and the insulating plate are arranged, the heaters and the thermocouples are arranged in the upper heating module and the lower heating module, the thermocouples and the heaters are electrically connected with the upper computer and the temperature controller, and the thermocouples detect temperature and send data to the upper computer; the upper computer receives the temperature condition and issues an instruction to debug the temperature controller, the temperature controller controls the heater, temperature control is achieved, and the accuracy of measured data is effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of power semiconductor testing, in particular to a current measuring device under high temperature. Background Art

[0002] In the field of power semiconductor testing, high temperature testing is an indispensable stage and is of great significance to the performance inspection of the tested products. During the high temperature testing process, it is particularly important to ensure the reliability of the testing equipment.

[0003] Current transformers have the function of converting large currents into small currents in power system's energy metering, relay protection, automatic control and other devices. The reliability of their operation is of great significance to the safe operation of the entire power system. However, ordinary current transformers are tested in a high-temperature environment, and high temperature will affect the accuracy of the energy test data. In addition, uneven temperatures in various parts of the tested product will also reduce the accuracy of the energy measurement data. Utility Model Content

[0004] The technical problem to be solved by the utility model is how to improve the accuracy of measurement data.

[0005] The utility model solves the above technical problems through the following technical means:

[0006] A high-temperature current measuring device comprises an upper heating module (1), a connecting module (2), a measuring module (3), a lower heating module (4), and an insulating plate (5); the upper heating module (1), the measuring module (3), and the lower heating module (4) are connected and fixed in sequence through the connecting module (2), and the insulating plate (5) is arranged between the connecting module (2) and the measuring module (3); a heater (13) and a thermocouple (16) are arranged in the upper heating module (1) and the lower heating module (4), and the thermocouple (16) and the heater (13) are electrically connected to a host computer and a temperature controller.

[0007] Beneficial effects: Through the setting of the upper heating module, the connection module, the measuring module, the lower heating module and the insulating plate, the upper heating module and the lower heating module are both provided with heaters and thermocouples. The thermocouples and the heaters are electrically connected to the host computer and the temperature controller. The thermocouples detect the temperature and send data to the host computer. The host computer receives the temperature and issues instructions to debug the thermostat. The thermostat controls the heater to achieve temperature control, thereby effectively improving the accuracy of the electric energy measurement data.

[0008] Furthermore, the measuring module (3) is placed on the lower heating module (4), the connecting module (2) is connected to the lower heating module (4), the upper heating module (1) is connected to the lower heating module (4) via an insulating plate (5), and the upper heating module (1) and the lower heating module (4) clamp the measuring module (3).

[0009] Furthermore, the upper heating module (1) comprises an upper heating plate (11), a heater quartz tube (12), a heater (13), a spring (14), and a sealing plate (17); a plurality of heater quartz tubes (12) are fixedly inserted through the upper heating plate (11) at intervals along the X-axis, each of the heater quartz tubes (12) is installed with a heater (13), and a spring (14) is fixed at both left and right ends of each of the heaters (13), and the heaters (13) are clamped and fixed by the sealing plates (17) on the left and right sides, so as to squeeze them tightly.

[0010] Beneficial effects: Through the mutual cooperation of the upper heating plate, heater quartz tube, heater, spring, and sealing plate, the heaters in the upper heating module are evenly distributed, ensuring uniform heat distribution on the entire plane during heating. Springs are installed at both ends of the heater to clamp the heater so that the heater is in a stable and centered state to achieve temperature uniformity; the heater and the thermocouple are covered with a quartz tube to increase the pressure resistance and ensure stable operation under high voltage conditions.

[0011] Furthermore, the upper heating module (1) further comprises a thermocouple quartz tube (15) and a thermocouple (16); the thermocouple quartz tube (15) is fixed in both left and right sides of the upper heating plate (11); and the thermocouple (16) is fixed in both the thermocouple quartz tube (15).

[0012] Furthermore, a thermocouple quartz tube (15) is installed on the left side of the upper heating plate (11), and two thermocouple quartz tubes (15) are installed on the right side of the upper heating plate (11), and a thermocouple (16) is fixed in each of the thermocouple quartz tubes (15).

[0013] Furthermore, the upper heating module (1) further comprises a first fixing plate (18), two first fixing plates (18) are provided and are respectively fixed to the front and rear sides of the upper heating plate (11), and the first fixing plates (18) are fixed to the top wall of the connecting module (2).

[0014] Furthermore, the structure of the lower heating module (4) is the same as that of the upper heating module (1).

[0015] Furthermore, two insulating plates (5) are provided, which are respectively fixed to the bottom of the inner side of the first fixing plate (18).

[0016] Furthermore, the connection module (2) comprises a connection plate (21) and a connection member (22); the connection plate (21) is provided with a hollow middle portion, the size of the hollow middle portion is slightly larger than the size of the measuring module (3), and a plurality of connection members (22) are fixed along the X-axis near the hollow middle portion on the front and rear sides of the bottom wall of the connection plate (21), and the free ends of the connection members (22) are fixed on the lower heating module (4).

[0017] Furthermore, the measuring module (3) comprises a heat-insulating upper plate (31), a heat-insulating lower plate (32), a current transformer (33), a current-carrying copper column (34), and a universal air nozzle (35); a first groove (321) is provided on the periphery of the middle part of the heat-insulating lower plate (32), a universal air nozzle (35) is fixed at both corners of the first groove (321), a current transformer (33) is fixed in the body of the first groove (321), a second groove is provided through the middle part of the heat-insulating lower plate (32), a current-carrying copper column (34) is fixed in the second groove, and a current transformer (33) is fixed in the body of the first groove (321). The heat-insulating lower plate (32) is provided with a heat-insulating upper plate (31) fixed on the top wall thereof; the current transformer (33), the overcurrent copper column (34) and the universal air nozzle (35) are sandwiched between the heat-insulating lower plate (32) and the heat-insulating upper plate (31); an opening (311) is provided through the heat-insulating upper plate (31) near the overcurrent copper column (34); the overcurrent copper column (34) passes through the hole grooves on the current transformer (33), the heat-insulating lower plate (32) and the heat-insulating upper plate (31); and the current transformer (33) is electrically connected to a host computer.

[0018] Beneficial effects: Through the cooperation of the insulation upper plate, insulation lower plate, current transformer, current copper column and universal air nozzle, the current transformer has non-metallic insulation plates on the upper and lower parts, the insulation plates have horizontal and vertical staggered slots, heat is dissipated through the universal air nozzle, and the current copper column passes through the middle, which ensures the current capacity and prevents the influence of high temperature on the measurement, further ensuring the accuracy of the electric energy measurement data.

[0019] The advantages of the utility model are:

[0020] The utility model arranges an upper heating module, a connection module, a measuring module, a lower heating module and an insulating plate. A heater and a thermocouple are arranged in the upper heating module and the lower heating module. The thermocouple and the heater are electrically connected to a host computer and a temperature controller. The thermocouple detects the temperature and sends data to the host computer. The host computer receives the temperature and issues instructions to debug the temperature controller. The temperature controller controls the heater to realize temperature control, thereby effectively improving the accuracy of the measurement data.

[0021] The utility model achieves uniform distribution of heaters in the upper heating module through the mutual cooperation of the upper heating plate, the heater quartz tube, the heater, the spring and the sealing plate, thereby ensuring uniform heat distribution on the entire plane during heating; springs are installed at both ends of the heater to clamp the heater so that the heater is in a stable and centered state, thereby achieving temperature uniformity; the heater and the thermocouple are covered with a quartz tube to increase the pressure resistance and ensure stable operation under high voltage conditions.

[0022] The utility model cooperates with each other through the heat-insulating upper plate, the heat-insulating lower plate, the current transformer, the overcurrent copper column and the universal air nozzle. The current transformer has heat-insulating plates made of non-metallic materials above and below. The heat-insulating plates are provided with horizontal and vertical staggered slots. Heat is dissipated through the universal air nozzle. The overcurrent copper column passes through the middle, so as to ensure the overcurrent capacity and prevent the influence of high temperature on the measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a three-dimensional diagram of a current measuring device at high temperature according to a first embodiment of the utility model;

[0024] Figure 2 This is an exploded view of the upper heating plate module and the insulating plate in the high temperature current measuring device of the first embodiment of the utility model;

[0025] Figure 3 This is an exploded view of a connection module in a current measuring device at high temperature according to a first embodiment of the utility model;

[0026] Figure 4 This is an exploded diagram of a measuring module in a current measuring device at high temperature according to a first embodiment of the utility model;

[0027] Figure 5 This is an exploded view of the lower heating plate module in the high temperature current measurement device according to the first embodiment of the utility model. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Embodiment 1

[0030] like Figure 1 As shown, this embodiment provides a current measurement device at high temperature, including an upper heating module 1, a connection module 2, a measurement module 3, a lower heating module 4, and an insulating plate 5;

[0031] like Figure 1As shown, the upper heating module 1, the measuring module 3, and the lower heating module 4 are connected and fixed in sequence through the connecting module 2, and the insulating plate 5 is arranged between the connecting module 2 and the measuring module 3; the measuring module 3 is placed on the lower heating module 4 and does not need to be connected. The connecting module 2 is connected to the lower heating module 4, and the upper heating module 1 is connected to the lower heating module 4 through the insulating plate 5. At the same time, the upper heating module 1 and the lower heating module 4 clamp the measuring module 3.

[0032] like Figure 1 , Figure 2 As shown, the upper heating module 1 includes an upper heating plate 11, a heater quartz tube 12, a heater 13, a spring 14, a thermocouple quartz tube 15, a thermocouple 16, a sealing plate 17, and a first fixed plate 18; a plurality of heater quartz tubes 12 are fixedly inserted through the upper heating plate 11 along the X-axis, and a heater 13 is installed in each heater quartz tube 12. Springs 14 are fixed at both ends of each heater 13, and the heaters 13 are clamped and fixed by the sealing plates 17 on the left and right sides to squeeze the heaters 13; the heaters 13 in the upper heating module 1 are evenly distributed to ensure uniform heat distribution on the entire plane during heating, and springs 14 are installed at both ends of the heater 13 to clamp the heater 13 so that the heater 13 is in a stable centered state to achieve temperature uniformity; the heater 13 and the thermocouple 16 are covered with quartz tubes to increase the pressure resistance and ensure stable operation under high voltage conditions;

[0033] like Figure 1 , Figure 2 As shown, thermocouple quartz tubes 15 are fixed in the left and right sides of the upper heating plate 11, and thermocouples 16 are fixed in the thermocouple quartz tubes 15. In this embodiment, a thermocouple quartz tube 15 is installed on the left side of the upper heating plate 11, and two thermocouple quartz tubes 15 are installed on the right side of the upper heating plate 11, and thermocouples 16 are fixed in each thermocouple quartz tube 15; the thermocouple 16, the host computer (not shown), the temperature controller (not shown), and the heater 13 are electrically connected, the thermocouple 16 detects the temperature, sends data to the host computer, and the host computer receives the temperature and issues instructions to debug the thermostat, and the thermostat controls the heater 13 to achieve temperature control;

[0034] like Figure 1 , Figure 2 As shown, two first fixing plates 18 are provided, which are fixed to the front and rear sides of the upper heating plate 11 respectively, and two insulating plates 5 are provided, which are fixed to the bottom of the inner side of the first fixing plates 18 respectively; the first fixing plates 18 are fixed to the top wall of the connecting module 2.

[0035] like Figure 1 , Figure 3As shown, the connecting module 2 includes a connecting plate 21 and a connecting member 22; the connecting plate 21 is hollow in the middle, the size of the hollow in the middle is slightly larger than the size of the measuring module 3, and a plurality of connecting members 22 are fixed along the X-axis near the hollow in the middle on the front and rear sides of the bottom wall of the connecting plate 21, and the free end of the connecting member 22 is fixed on the lower heating module 4.

[0036] like Figure 1 , Figure 4 As shown, the measuring module 3 includes an insulating upper plate 31, an insulating lower plate 32, a current transformer 33, a current copper column 34, and a universal air nozzle 35; a first groove 321 is provided on the periphery of the middle of the insulating lower plate 32, and universal air nozzles 35 are fixed at both corners of the first groove 321, and the current transformer 33 is fixed in the main body of the first groove 321, and a second groove (not shown) is provided through the middle of the insulating lower plate 32, and the current copper column 34 is fixed in the second groove, and the insulating upper plate 31, the current transformer 33, the current copper column 34, and the universal air nozzle 35 are fixed on the top wall of the insulating lower plate 32. Between the thermal insulation lower plate 32 and the thermal insulation upper plate 31, the thermal insulation lower plate 32 and the thermal insulation upper plate 31 are fixed by screws, and the thermal insulation upper plate 31 is provided with an opening 311 near the overcurrent copper column 34, and the overcurrent copper column 34 passes through the current transformer 33, the thermal insulation lower plate 32, and the hole grooves on the thermal insulation upper plate 31; the current transformer 33 is electrically connected to the host computer (not shown); the current transformer 33 has non-metallic insulation plates above and below, and the insulation plates have horizontal and vertical staggered grooves, which are dissipated by a universal air nozzle 35, and the overcurrent copper column 34 passes through the middle, so as to ensure the overcurrent capacity and prevent the influence of high temperature on the measurement.

[0037] like Figure 1 , Figure 3 , Figure 5 As shown, the structure of the lower heating module 4 is the same as that of the upper heating module 1, and the free ends of each connecting piece 22 are fixed on the second fixed plate 48; the upper and lower heating plates are copper plates, which have both good thermal conductivity and excessive current capacity. The upper and lower heating are used for functional testing, which effectively improves the test efficiency.

[0038] When in use, a first module under test is placed on the upper surface of the upper heating plate 11, and a lower surface of the lower heating module 4 is pressed on the second module under test, so that the two modules are evenly heated. At the same time, the lower surface of the upper heating plate 11 contacts the thermal insulation upper plate 31, and the upper surface of the lower heating module 4 contacts the thermal insulation lower plate 32. The overall heat is isolated and cannot be transmitted to the current transformer 33. At the same time, a universal air nozzle 35 is provided inside to blow out dry gas, so as to further dissipate the heat as a whole and improve the test accuracy. At the same time, after the current is passed through the module under test, the current passes from the upper heating plate 11 to the overcurrent copper column 34 to the lower heating module 4. When the current passes through the overcurrent copper column 34, it is measured by the current transformer 33, and the measurement data is sent to the host computer.

[0039] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A current measuring device at high temperature, characterized in that: It comprises an upper heating module (1), a connection module (2), a measurement module (3), a lower heating module (4), and an insulating plate (5); The upper heating module (1), the measuring module (3), and the lower heating module (4) are connected and fixed in sequence through a connecting module (2), and an insulating plate (5) is arranged between the connecting module (2) and the measuring module (3); a heater (13) and a thermocouple (16) are arranged in the upper heating module (1) and the lower heating module (4), and the thermocouple (16) and the heater (13) are electrically connected to a host computer and a temperature controller.

2. The high temperature current measuring device according to claim 1, characterized in that: The measuring module (3) is placed on the lower heating module (4), the connecting module (2) is connected to the lower heating module (4), the upper heating module (1) is connected to the lower heating module (4) via an insulating plate (5), and the upper heating module (1) and the lower heating module (4) clamp the measuring module (3).

3. The high temperature current measuring device according to claim 1, characterized in that: The upper heating module (1) comprises an upper heating plate (11), a heater quartz tube (12), a heater (13), a spring (14), and a sealing plate (17); a plurality of heater quartz tubes (12) are fixedly inserted through the upper heating plate (11) at intervals along the X-axis, each of the heater quartz tubes (12) is equipped with a heater (13), and a spring (14) is fixed at both left and right ends of each of the heaters (13), and the heaters (13) are clamped and fixed by the sealing plates (17) on the left and right sides, thereby squeezing the heaters (13) tightly.

4. The high temperature current measuring device according to claim 3, characterized in that: The upper heating module (1) further comprises a thermocouple quartz tube (15) and a thermocouple (16); the thermocouple quartz tube (15) is fixed in both left and right sides of the upper heating plate (11); and the thermocouple (16) is fixed in both the thermocouple quartz tube (15).

5. The high temperature current measuring device according to claim 4, characterized in that: A thermocouple quartz tube (15) is installed on the left side of the upper heating plate (11), and two thermocouple quartz tubes (15) are installed on the right side of the upper heating plate (11), and a thermocouple (16) is fixed in each of the thermocouple quartz tubes (15).

6. The current measuring device at high temperature according to claim 3, characterized in that: The upper heating module (1) further comprises a first fixing plate (18), two first fixing plates (18) are provided and are respectively fixed to the front and rear sides of the upper heating plate (11), and the first fixing plates (18) are fixed to the top wall of the connecting module (2).

7. A high temperature current measuring device according to any one of claims 1 to 6, characterized in that: The structure of the lower heating module (4) is the same as that of the upper heating module (1).

8. The high temperature current measuring device according to claim 6, characterized in that: Two insulating plates (5) are provided and are respectively fixed at the bottom of the inner side of the first fixing plate (18).

9. The high temperature current measuring device according to claim 1, characterized in that: The connection module (2) comprises a connection plate (21) and a connection piece (22); the connection plate (21) is provided with a hollow middle portion, the size of the hollow middle portion is larger than the size of the measurement module (3), a plurality of connection pieces (22) are fixed along the X-axis near the hollow middle portion at the front and rear sides of the bottom wall of the connection plate (21), and the free ends of the connection pieces (22) are fixed on the lower heating module (4).

10. The high temperature current measuring device according to claim 1, characterized in that: The measuring module (3) comprises a heat-insulating upper plate (31), a heat-insulating lower plate (32), a current transformer (33), a current-carrying copper column (34), and a universal air nozzle (35); a first groove (321) is provided on the periphery of the middle part of the heat-insulating lower plate (32), universal air nozzles (35) are fixed at both corners of the first groove (321), a current transformer (33) is fixed in the body of the first groove (321), a second groove is provided through the middle part of the heat-insulating lower plate (32), and a current-carrying copper column (34) is fixed in the second groove. 34), a heat-insulating upper plate (31) is fixed on the top wall of the heat-insulating lower plate (32), the current transformer (33), the overcurrent copper column (34), and the universal air nozzle (35) are clamped between the heat-insulating lower plate (32) and the heat-insulating upper plate (31), the heat-insulating upper plate (31) is provided with an opening (311) near the overcurrent copper column (34), and the overcurrent copper column (34) passes through the current transformer (33), the heat-insulating lower plate (32), and the hole groove on the heat-insulating upper plate (31); the current transformer (33) is electrically connected to the upper computer.

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