Thermal relay power automatic testing device

Abstract

The utility model relates to the technical field of power system protection, in particular to a thermal relay power automatic testing device, which comprises a working platform, a first conveying mechanism longitudinally fixed on the working platform and used for conveying a thermal relay, and a second conveying mechanism transversely connected on the working platform and used for transferring the thermal relay, the working platform is further provided with a current and voltage testing mechanism, a heating overload testing mechanism and a cooling mechanism, the current and voltage testing mechanism, the heating overload testing mechanism and the cooling mechanism are sequentially arranged on one side of the second conveying mechanism from left to right, and the current and voltage testing mechanism, the heating overload testing mechanism and the cooling mechanism are electrically connected. According to the utility model, the first conveying mechanism, the second conveying mechanism, the current and voltage testing mechanism and the heating overload testing mechanism are arranged, so that automatic testing of power characteristics of the thermal relay is realized, the testing efficiency is improved, personal errors are reduced, and the accuracy and reliability of testing results are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of power system protection, in particular to an automatic power testing device for a thermal relay. Background Art

[0002] As a key protection element in the power system, the performance of thermal relays is directly related to the stable operation of the power system. In order to ensure the reliability and effectiveness of thermal relays, they need to be strictly tested for performance, among which power characteristic test is one of the important indicators for evaluating the performance of thermal relays.

[0003] However, the traditional power test method usually relies on manual operation, which is not only inefficient but also easily affected by human factors, resulting in large errors in the test results. Therefore, researching and developing a device that can realize automatic testing of thermal relay power characteristics is of great significance to improve test efficiency and accuracy. Utility Model Content

[0004] In order to solve the technical defects raised in the above-mentioned background technology, the purpose of the utility model is to provide a thermal relay power automatic testing device, which can automatically complete the power characteristic test of the thermal relay, improve the testing efficiency, reduce human errors, and ensure the accuracy and reliability of the test results.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A thermal relay power automatic testing device comprises a working platform, a first conveying mechanism longitudinally fixed on the working platform for conveying the thermal relay, and a second conveying mechanism horizontally connected to the working platform for transferring the thermal relay. The working platform is also provided with a current and voltage testing mechanism, a thermal overload testing mechanism and a cooling mechanism. The current and voltage testing mechanism is used to test whether the current and voltage of the thermal relay are qualified, the thermal overload testing mechanism is used to test the power of the thermal relay under thermal overload, and the cooling mechanism is used to cool the thermal relay after the test is completed; the current and voltage testing mechanism, the thermal overload testing mechanism and the cooling mechanism are arranged in sequence from left to right on one side of the second conveying mechanism, and the current and voltage testing mechanism, the thermal overload testing mechanism and the cooling mechanism are electrically connected.

[0007] Preferably, the current and voltage testing mechanism includes a test pin, a power tester and a translation assembly, wherein a plurality of test pins are provided, and the plurality of test pins are respectively provided corresponding to the wiring contact positions on the thermal relay, and the test pin is electrically connected to the thermal relay; one side of the power tester is connected to the test pin, and the other end is externally connected to a power supply, and the bottom end of the power tester is connected to a fixed seat, and the fixed seat is slidably connected to the translation assembly.

[0008] Preferably, the thermal overload testing mechanism includes a mounting bracket, a heat source testing module and a lifting drive assembly, the mounting bracket is fixedly connected to the working platform, the heat source testing module and the lifting drive assembly are arranged directly above the second conveying mechanism, one end of the lifting drive assembly is fixed on the mounting bracket, and the other end is transmission-connected to the heat source testing module; a lifting assembly for lifting the thermal relay is arranged below the thermal overload testing mechanism and connected to the middle of the second conveying mechanism.

[0009] Preferably, the cooling mechanism includes a cooling fan and a wind direction plate. There are multiple cooling fans, and the multiple cooling fans are arranged in parallel at the bottom of the second conveying mechanism. The wind direction plate has a trumpet-shaped structure, with the side with a larger opening facing the cooling fan, and the side with a smaller opening fixed to the bottom end of the second conveying mechanism.

[0010] Preferably, the end of the first conveying mechanism and the head end of the second conveying mechanism are linked to each other through a hinge; and a transfer mechanism for transferring the thermal relay is provided between the first conveying mechanism and the second conveying mechanism.

[0011] Preferably, the transfer mechanism includes a mounting frame fixedly connected to the working platform, a transverse moving component slidably connected to the mounting frame, and a longitudinal lifting component slidably connected to the transverse moving component; a limit block is provided on the mounting frame on one side of the transverse moving component, the transverse moving component includes a transverse linear slide rail, a connecting block and a driving cylinder, the transverse linear slide rail is connected to a side of the mounting frame close to the longitudinal lifting component, one end of the connecting block is fixedly connected to the longitudinal lifting component, and the other end is drivingly connected to the driving cylinder via a telescopic shaft.

[0012] Preferably, the longitudinal lifting assembly includes a guide sleeve, a fixed plate, a longitudinal linear slide rail and a lifting cylinder, the guide sleeve is slidably connected to the transverse linear slide rail, and the other side of the guide sleeve is connected to the fixed plate, the longitudinal linear slide rail is fixedly connected to the fixed plate, and a material picking assembly for grabbing the thermal relay is slidably connected to the longitudinal linear slide rail, and the output end of the lifting cylinder is transmission-connected to the material picking assembly.

[0013] Preferably, the first conveying mechanism and the second conveying mechanism are both composed of a support frame, a load-bearing member and a driving assembly. The load-bearing member is fixed on the support frame, and a pulley transmission assembly is rotatably connected inside the load-bearing member. A supporting slide rod for hanging a thermal relay is arranged in parallel on the load-bearing member, and the pulley transmission assembly is transmission-connected to the driving assembly.

[0014] In summary, the beneficial effects of the utility model are:

[0015] The utility model provides a first conveying mechanism and a second conveying mechanism, so that the thermal relay can realize automatic loading and unloading and transportation. At the same time, the current and voltage testing mechanism is provided, so that the working current and voltage of the thermal relay can be measured in real time to ensure the accuracy of the measurement data. The temperature of the thermal relay is adjusted by providing a heating overload testing mechanism to simulate its thermal behavior in actual work and ensure the safety of the test process; thus, the automatic test of the power characteristics of the thermal relay is realized, the test efficiency is improved, the human error is reduced, and the accuracy and reliability of the test result are guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model thermal relay power automatic testing device;

[0017] Figure 2 This is a top view of the thermal relay power automatic testing device of the utility model;

[0018] Figure 3 This is a front view of the utility model thermal relay power automatic test device;

[0019] Figure 4 It is a structural schematic diagram of the first conveying mechanism, the second conveying mechanism and the switching mechanism in the utility model.

[0020] Description of reference numerals in the figures:

[0021] 1. Working platform; 2. First conveying mechanism; 3. Second conveying mechanism; 31. Support frame; 32. Bearing member; 33. Driving assembly; 34. Pulley transmission assembly; 35. Support slide bar; 4. Current and voltage testing mechanism; 41. Test pin; 42. Power tester; 43. Translation assembly; 44. Fixed seat; 5. Heat overload testing mechanism; 51. Mounting bracket; 52. Heat source testing module; 53. Lifting driving assembly; 6. Cooling mechanism; 61. Cooling fan; 62. Wind deflector; 7. Lifting assembly; 8. Transfer mechanism; 81. Mounting frame; 811. Limiting block; 82. Lateral moving assembly; 821. Horizontal linear slide; 822. Connecting block; 823. Driving cylinder; 83. Longitudinal lifting assembly; 831. Guide sleeve; 832. Fixed plate; 833. Longitudinal linear slide; 834. Lifting cylinder; 84. Material taking assembly; 9. Thermal relay. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0023] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0024] In the description of the utility model, if there is a word description such as "several", it means one or more, and the meaning of "more" is two or more. Greater than, less than, and more than are understood to exclude the number itself, and above, below, and within are understood to include the number itself. If there is a description of the first, second, and third, it is only used to distinguish the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0025] The following is combined with Figure 1-4 , an embodiment of the utility model of a thermal relay power automatic testing device is further described in detail.

[0026] A thermal relay 9 power automatic testing device, such as Figure 1 As shown, it includes a working platform 1, a first conveying mechanism 2 longitudinally fixed on the working platform 1 for conveying the thermal relay 9, and a second conveying mechanism 3 horizontally connected to the working platform 1 for transferring the thermal relay 9. The working platform 1 is also provided with a current and voltage testing mechanism 4, a thermal overload testing mechanism 5 and a cooling mechanism 6. The current and voltage testing mechanism 4 is used to test whether the current and voltage of the thermal relay 9 are qualified, the thermal overload testing mechanism 5 is used to test the power of the thermal relay 9 under overheating and overload, and the cooling mechanism 6 is used to cool the thermal relay 9 after the test is completed; the current and voltage testing mechanism 4, the thermal overload testing mechanism 5 and the cooling mechanism 6 are arranged on one side of the second conveying mechanism 3 from left to right, and the current and voltage testing mechanism 4, the thermal overload testing mechanism 5 and the cooling mechanism 6 are electrically connected.

[0027] Specifically, in electrical equipment, it is necessary to select thermal relays 9 of different powers as protective electrical appliances according to the needs of the work. In the process of testing the power of the thermal relay 9, relying on manual testing is not only inefficient, but also prone to errors, resulting in deviations in the test results. The utility model automatically transports the thermal relay 9 to the detection station for automatic detection by setting a first conveying mechanism 2 and a second conveying mechanism 3. At the same time, the power of the thermal relay 9 is detected and the temperature of the thermal relay 9 is adjusted by the current and voltage testing mechanism 4 and the heating overload testing mechanism 5, respectively, to simulate its thermal behavior in actual work; after the detection is completed, the thermal relay 9 is restored to normal temperature by the cooling mechanism 6; in addition, all mechanisms of the utility model are externally connected to a control unit, wherein the control unit integrates a microprocessor, a control algorithm and a data processing unit, calculates the power of the thermal relay 9 according to the measured data, and controls the test process. The control unit also has an interface for communicating with a computer, which can realize remote transmission and storage of data, and can also process and analyze the measured data, generate a test report, and display it to the user through a human-computer interaction interface; the data processing unit also has a data export function, which can export the test results into a standard format, which is convenient for subsequent data analysis and archiving.

[0028] In this embodiment, if Figure 2 , 3 As shown, the current and voltage testing mechanism 4 includes a test pin 41, a power tester 42 and a translation assembly 43. There are multiple test pins 41, and the multiple test pins 41 are respectively arranged corresponding to the wiring contact positions on the thermal relay 9, and the test pin 41 is electrically connected to the thermal relay 9; one side of the power tester 42 is connected to the test pin 41, and the other end is externally connected to a power supply, and the bottom end of the power tester 42 is connected to a fixed seat 44, and the fixed seat 44 is slidably connected to the translation assembly 43.

[0029] Specifically, when the thermal relay 9 is subjected to current and voltage detection, the current and voltage testing mechanism 4 automatically controls the test distance through the translation component 43, so that the test pin 41 can correspond to the wiring contact on the thermal relay 9, and a drive motor is connected to one end of the test pin 41, and the drive motor is used to control the test pin 41 to be plugged into the wiring contact on the thermal relay 9. At the same time, the power tester 42 simulates the current and voltage during operation and is connected to the thermal relay 9 through the test pin 41, thereby detecting the working power of the thermal relay 9.

[0030] It is worth noting that the translation assembly 43 adopts the common linear slide movement method in common knowledge, and uses a motor to control the guide plate to slide along the linear slide, thereby controlling the movement of the current and voltage testing mechanism 4, so it will not be described in detail here; the specific transmission method of the translation assembly 43 is differently limited in the utility model. Under the condition of having the same effect, other known transmission structures can also be used, including but not limited to gear transmission, screw transmission, etc.

[0031] In this embodiment, the thermal overload test mechanism 5 includes a mounting bracket 51, a heat source test module 52 and a lifting drive assembly 53. The mounting bracket 51 is fixedly connected to the working platform 1, and the heat source test module 52 and the lifting drive assembly 53 are arranged directly above the second conveying mechanism 3. One end of the lifting drive assembly 53 is fixed on the mounting bracket 51, and the other end is transmission-connected to the heat source test module 52. A lifting assembly 7 for lifting the thermal relay 9 is arranged below the thermal overload test mechanism 5 and connected to the middle of the second conveying mechanism 3.

[0032] Specifically, while the current and voltage tests are being carried out on the thermal relay 9, the thermal overload test mechanism 5 located above the second conveying mechanism 3 will carry out a thermal pressure test on the thermal relay 9 through the heat source test module 52, wherein the heat source test module 52 is pressed downward into the thermal relay 9 under the driving action of the lifting drive assembly 53, and continuously adjusts the temperature of the thermal relay 9 to imitate the thermal behavior of the thermal relay 9 in actual work, thereby measuring the power of the thermal relay 9 under the condition of thermal overload; and the heat source test module 52 adopts an ordinary heating element, which can automatically control the heating temperature, and thus can accurately control the heating temperature of the thermal relay 9; in addition, the lifting drive mechanism is driven by a cylinder, the cylinder is fixed on the mounting bracket 51, and the output end of the cylinder is transmission-connected to the heat source test module 52, so that under the drive of the cylinder, the heat source test module 52 can be freely raised and lowered.

[0033] It is worth mentioning that in order to further facilitate the testing of thermal relays 9 of different sizes, the lifting assembly 7 arranged at the bottom of the second conveying mechanism 3 can be lifted to a suitable height according to the size of the thermal relay 9. The lifting assembly 7 also adopts a lifting cylinder and a fixed seat 44. The lifting cylinder is fixed to the bottom of the working platform 1, and the output end of the lifting flagpole is transmission-connected to the fixed seat 44. The fixed seat 44 is located in the middle position of the second conveying mechanism 3. The thermal relay 9 is installed on the fixed seat 44. Driven by the lifting cylinder, the fixed seat 44 lifts the thermal relay 9 to a suitable height, thereby facilitating the current and voltage testing mechanism 4 and the thermal overload testing mechanism 5 to perform detection.

[0034] In this embodiment, the cooling mechanism 6 includes a cooling fan 61 and a wind deflector 62. A plurality of cooling fans 61 are provided, and the plurality of cooling fans 61 are arranged in parallel at the bottom of the second conveying mechanism 3. The wind deflector 62 has a trumpet-shaped structure, with the side with a larger opening facing the cooling fan 61, and the side with a smaller opening fixed to the bottom end of the second conveying mechanism 3.

[0035] Specifically, after the thermal relay 9 completes the thermal overload test, it needs to be cooled, and the cooling fan 61 and the wind direction plate 62 arranged at the bottom of the second conveying mechanism 3 are used for cooling. The end of the wind direction plate 62 with a smaller opening is connected to the second conveying mechanism 3, and the other end faces the cooling fan 61. During the cooling process, the wind blown by the cooling fan 61 can quickly act on the thermal relay 9 under the drainage action of the wind direction plate 62, so that it can be quickly cooled down, thereby facilitating the next step of processing.

[0036] In this embodiment, if Figure 4 As shown, the end of the first conveying mechanism 2 is linked to the head end of the second conveying mechanism 3 through a hinge; and a switching mechanism 8 for transferring the thermal relay 9 is arranged between the first conveying mechanism 2 and the second conveying mechanism 3; the switching mechanism 8 includes a mounting frame 81 fixedly connected to the working platform 1, a transverse moving component 82 slidably connected to the mounting frame 81, and a longitudinal lifting component 83 slidably connected to the transverse moving component 82; a limiting block 811 is arranged on one side of the transverse moving component 82 on the mounting frame 81, and the transverse moving component 82 includes a transverse linear slide rail 821, a connecting block 822 and a driving cylinder 823, the transverse linear slide rail 821 is connected to the side of the mounting frame 81 close to the longitudinal lifting component 83, one end of the connecting block 822 is fixedly connected to the longitudinal lifting component 83, and the other end is drivingly connected to the driving cylinder 823 with a telescopic shaft.

[0037] Specifically, since the first conveying mechanism 2 and the second conveying mechanism 3 are arranged vertically, in order to save costs, the end of the first conveying mechanism 2 and the head end of the second conveying mechanism 3 are connected by a hinge, so that the first conveying mechanism 2 can drive the second conveying mechanism 3 to rotate together during operation. At the same time, the transfer mechanism 8 arranged on one side of the first conveying mechanism 2 can transfer the thermal relay 9 to the second conveying mechanism 3, or take out the unqualified thermal relays 9 separately for sorting, so as to reduce the intensity of manual labor; the transfer mechanism 8 can realize adjustment in four directions of up, down, left and right through the lateral moving component 82 and the longitudinal lifting component 83, thereby realizing multi-directional adjustment of the thermal relay 9.

[0038] In this embodiment, the longitudinal lifting assembly 83 includes a guide sleeve 831, a fixed plate 832, a longitudinal linear slide rail 833 and a lifting cylinder 834. The guide sleeve 831 is slidably connected to the transverse linear slide rail 821, and the other side of the guide sleeve 831 is connected to the fixed plate 832. The longitudinal linear slide rail 833 is fixedly connected to the fixed plate 832, and a material picking assembly 84 for grabbing the thermal relay 9 is slidably connected to the longitudinal linear slide rail 833. The output end of the lifting cylinder 834 is transmission-connected to the material picking assembly 84.

[0039] Specifically, the material picking component 84 includes a clamp and a connecting plate, one side of the connecting plate is transmission-connected to the lifting cylinder 834, and the other end is movably connected to the clamp. The clamp adopts a double-sided clamping method, that is, the thermal relay 9 is grasped by the left and right mutual clamping actions, and the sorting action is completed under the drive of the horizontal moving component 82 and the longitudinal lifting component 83, so that qualified products enter the second conveying mechanism 3 to continue the next step of operation, and unqualified products are picked out and recycled, which not only improves the efficiency of front-end detection, but also can better improve the sorting efficiency.

[0040] In this embodiment, the first conveying mechanism 2 and the second conveying mechanism 3 are both composed of a support frame 31, a load-bearing member 32 and a driving assembly 33. The load-bearing member 32 is fixed on the support frame 31, and a pulley transmission assembly 34 is rotatably connected inside the load-bearing member 32. A supporting slide rod 35 for hanging the thermal relay 9 is arranged in parallel on the load-bearing member 32, and the pulley transmission assembly 34 is transmission-connected to the driving assembly 33.

[0041] Specifically, the first conveying mechanism 2 and the second conveying mechanism 3 convey the thermal relay 9 from two different directions respectively, wherein one end of the first conveying mechanism 2 is bent downward to lift the thermal relay 9 at a lower position to a higher position, and the load-bearing member 32 and the supporting slide bar 35 are both compatible with the thermal relay 9. In order to facilitate the rapid conveyance of the thermal relay 9, the driving component 33 is driven by a servo motor, and the thermal relay 9 can slide along the supporting slide bar 35 under the transmission of the pulley assembly, wherein the pulley assembly uses a pulley and a transmission belt for transmission, and the pulley transmission is common knowledge, so its working principle is not described here.

[0042] The working principle of this utility model:

[0043] When the thermal relay 9 is inspected, the first conveying mechanism 2 is used to convey the thermal relay 9 to the second conveying mechanism 3, and a transfer mechanism is used to screen out qualified products, and the qualified products are simultaneously transferred from the first inspection mechanism to the second conveying mechanism 3, and then the thermal relay 9 is continued to be transported along the conveying mechanism through the second conveying mechanism 3. When passing through the current and voltage testing mechanism 4, the current and voltage testing mechanism 4 is connected to the bolt interface on the thermal relay 9 by the test pin 41, and the current and voltage values ​​on the thermal relay 9 are tested at the beginning of the inspection; at the same time, the thermal overload testing mechanism 5 will be connected to the thermal relay 9 from the upper and lower directions, and a thermal overload test will be performed on it, and finally the test results will be displayed through an external display, thereby realizing automatic power testing of the thermal relay 9, improving test efficiency, reducing human errors, and ensuring the accuracy and reliability of the test results.

[0044] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A thermal relay power automatic test device, comprising a working platform, a first conveying mechanism longitudinally fixed on the working platform for conveying the thermal relay, and a second conveying mechanism transversely connected to the working platform for transporting the thermal relay, characterized in that: The working platform is also provided with a current and voltage testing mechanism, a heat overload testing mechanism and a cooling mechanism. The current and voltage testing mechanism is used to test whether the current and voltage of the thermal relay are qualified, the heat overload testing mechanism is used to test the power of the thermal relay under overheating and overload, and the cooling mechanism is used to cool the thermal relay after the test is completed; the current and voltage testing mechanism, the heat overload testing mechanism and the cooling mechanism are arranged in sequence from left to right on one side of the second conveying mechanism, and the current and voltage testing mechanism, the heat overload testing mechanism and the cooling mechanism are electrically connected.

2. The thermal relay power automatic testing device according to claim 1 is characterized in that: The current and voltage testing mechanism includes a test pin, a power tester and a translation component. There are multiple test pins, and the multiple test pins are respectively arranged corresponding to the wiring contact positions on the thermal relay, and the test pin is electrically connected to the thermal relay; one side of the power tester is connected to the test pin, and the other end is externally connected to a power supply, and the bottom end of the power tester is connected to a fixed seat, and the fixed seat is slidably connected to the translation component.

3. The thermal relay power automatic testing device according to claim 2 is characterized in that: The thermal overload testing mechanism includes a mounting bracket, a heat source testing module and a lifting drive assembly. The mounting bracket is fixedly connected to the working platform. The heat source testing module and the lifting drive assembly are arranged directly above the second conveying mechanism. One end of the lifting drive assembly is fixed to the mounting bracket, and the other end is transmission-connected to the heat source testing module. A lifting assembly for lifting the thermal relay is arranged below the thermal overload testing mechanism and connected to the middle of the second conveying mechanism.

4. The thermal relay power automatic testing device according to claim 3 is characterized in that: The cooling mechanism includes a cooling fan and a wind direction plate. There are multiple cooling fans, which are arranged in parallel at the bottom of the second conveying mechanism. The wind direction plate has a trumpet-shaped structure, with the side with a larger opening facing the cooling fan and the side with a smaller opening fixed to the bottom end of the second conveying mechanism.

5. The thermal relay power automatic testing device according to claim 4 is characterized in that: The end of the first conveying mechanism and the head end of the second conveying mechanism are linked and connected via a hinge; and a transfer mechanism for transferring the thermal relay is arranged between the first conveying mechanism and the second conveying mechanism.

6. The thermal relay power automatic testing device according to claim 5 is characterized in that: The transfer mechanism includes a mounting frame fixedly connected to the working platform, a transverse moving component slidably connected to the mounting frame, and a longitudinal lifting component slidably connected to the transverse moving component; a limit block is provided on the mounting frame at one side of the transverse moving component, and the transverse moving component includes a transverse linear slide rail, a connecting block and a driving cylinder, the transverse linear slide rail is connected to a side of the mounting frame close to the longitudinal lifting component, one end of the connecting block is fixedly connected to the longitudinal lifting component, and the other end is drivingly connected to the driving cylinder with a telescopic shaft.

7. The thermal relay power automatic testing device according to claim 6 is characterized in that: The longitudinal lifting assembly includes a guide sleeve, a fixed plate, a longitudinal linear slide rail and a lifting cylinder. The guide sleeve is slidably connected to the transverse linear slide rail, and the other side of the guide sleeve is connected to the fixed plate. The longitudinal linear slide rail is fixedly connected to the fixed plate, and a material picking assembly for grabbing the thermal relay is slidably connected to the longitudinal linear slide rail. The output end of the lifting cylinder is transmission-connected to the material picking assembly.

8. The thermal relay power automatic testing device according to claim 7, characterized in that: The first conveying mechanism and the second conveying mechanism are both composed of a support frame, a load-bearing component and a driving assembly. The load-bearing component is fixed on the support frame, and a pulley transmission assembly is rotatably connected inside the load-bearing component. A supporting slide rod for hanging a thermal relay is arranged in parallel on the load-bearing component, and the pulley transmission assembly is transmission-connected to the driving assembly.

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