Relay protection device test platform

Abstract

The utility model discloses a relay protection device test platform, which belongs to the technical field of relay protection device detection, and comprises a test cavity and a sealing cover, the sealing cover is provided with two mounting holes, a driving motor is arranged between the two mounting holes, and the output end of the driving motor is connected with a driving gear through a driving shaft. Gear assemblies are arranged on the two sides of the driving gear and connected with a conversion plate, an airflow cavity is formed above the gear assemblies, and a hydraulic push rod is fixedly connected to the outer side wall of the testing cavity through a right-angle fixing plate. According to the utility model, through the arrangement of the wave turning assembly and the wave turning plates, the multiple wave turning plates can be driven by the wave turning rack and the multiple wave turning gears to synchronously turn over in the insulating oil, so that the insulating oil violently surges in the test cavity, and the working environment condition of the gas relay when the transformer has a large fault is simulated; therefore, the detection is more suitable for actual use, and the gas relay is ensured to work normally under the design threshold of each trigger condition.

Description

Technical Field

[0001] This utility model relates to the field of relay protection device testing technology, and in particular to a relay protection device testing platform. Background Technology

[0002] Relay protection devices are key equipment in power systems used to detect faults and quickly isolate faulty parts. The selection of relay protection devices needs to take into account the power grid structure, voltage level, and equipment characteristics.

[0003] Relays are currently the most common relay protection devices. During routine use, when a minor fault occurs inside the transformer (such as localized overheating or decomposition of insulation materials), the insulating oil decomposes, producing gases (such as hydrogen or methane). These gases rise to the top of the gas relay and accumulate, triggering the gas relay float to sink or the gas quantity sensor to issue an alarm signal, thus protecting the transformer from gas accumulation. Conversely, when a serious fault occurs inside the transformer (such as a short circuit or arc discharge), the fault energy causes a violent surge in oil flow, impacting the gas relay's baffle or float. When the oil flow velocity exceeds a threshold, the impact triggers the mechanical mechanism, directly activating the trip circuit to disconnect the transformer for protection. This results in significant differences in the working environment of the gas relay under different conditions. Furthermore, factory testing of gas relays typically only checks the normality of individual components, making it difficult to reproduce their actual operating conditions, leading to poor testing results. Therefore, a relay protection device testing platform is proposed. Utility Model Content

[0004] The purpose of this utility model is to solve the problems in the prior art by proposing a relay protection device testing platform.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A relay protection device testing platform includes a test cavity and a sealing cover. The sealing cover has two mounting holes, and a drive motor is arranged between the two mounting holes. The output end of the drive motor is connected to a drive gear via a drive shaft. Gear assemblies are arranged on both sides of the drive gear, and a conversion plate is connected to the gear assembly. An airflow cavity is arranged above the gear assembly. A hydraulic push rod is fixedly connected to the outer wall of the test cavity via a right-angle fixing plate. The output end of the hydraulic push rod is connected to multiple wave-turning plates via a wave-turning assembly.

[0007] Preferably, the top end of the test cavity is fixedly connected to the bottom end of the sealing cover, the outer wall of the drive motor is fixedly connected to the sealing cover, and the output end of the drive motor is fixedly connected to the end of the drive gear through the drive shaft.

[0008] Preferably, the gear assembly consists of a booster gear and a reversing gear, wherein the drive gear meshes with the booster gear and the booster gear meshes with the reversing gear.

[0009] Preferably, the end of the flipping gear is fixedly connected to the side wall of the conversion plate via a rotating shaft, and multiple limiting seats are fixedly connected to the upper and lower ends of the conversion plate. The side wall of the conversion plate is rotatably connected to the inner side wall of the mounting hole on the sealing cover.

[0010] Preferably, the sealing cover has a ventilation chamber fixedly connected to the pressure boosting gear and the reversing gear, the top of the ventilation chamber is connected to the airflow chamber, and test air pumps are fixedly connected to the left and right side walls of the test cavity.

[0011] Preferably, the wave-turning assembly consists of a wave-turning rack and multiple wave-turning gears, the output end of the hydraulic push rod is fixedly connected to the end of the wave-turning rack, a limit guide rail is fixedly connected to the outer wall of the test cavity, and the outer wall of the wave-turning rack is slidably connected to the inner wall of the limit guide rail.

[0012] Preferably, the wave-turning rack meshes with multiple wave-turning gears, the end of the wave-turning gear is fixedly connected to the end of the wave-turning plate via a pin, and the pin is rotatably connected to the side wall of the test cavity.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This solution uses a rotating gear and a conversion plate to rotate the rotating gear and drive the conversion plate to rotate, thereby rotating the gas relay to be tested into the test cavity, rotating the tested gas relay out, removing the rotated gas relay, and then installing the gas relay to be tested later, thus improving the overall testing efficiency.

[0015] 2. This solution, through the setting of the flip gear and the booster gear, can utilize the cooperation of the booster gear and the flip gear to simultaneously rotate the gas relay under test into the test area and force the hydrogen and methane gas in the ventilation chamber into the top of the test cavity. This simulates the situation in daily use when the gas relay encounters a minor transformer fault, in which hydrogen and methane gas are generated and focused upwards. This better meets the subsequent use conditions of the gas relay, making the test results more reliable and accurate.

[0016] 3. This solution, through the setting of the wave-turning component and wave-turning plate, can use the wave-turning rack and multiple wave-turning gears to drive multiple wave-turning plates to rotate synchronously in the insulating oil, so that the insulating oil surges violently in the test cavity, simulating the working environment of the gas relay when a transformer has a major fault, making the test more in line with actual use, and ensuring that the gas relay can work normally under the design threshold of each triggering condition. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the relay protection device test platform proposed in this utility model;

[0018] Figure 2 This is an assembly drawing of the relay protection device test platform proposed in this utility model;

[0019] Figure 3 This is a schematic diagram of the position of the drive gear in the test platform of the relay protection device proposed in this utility model;

[0020] Figure 4 This is a schematic diagram of the gear assembly in the relay protection device test platform proposed in this utility model;

[0021] Figure 5 This is an assembly drawing of the test cavity and the tumbling gear in the relay protection device test platform proposed in this utility model;

[0022] Figure 6 This is a schematic diagram of the wave-turning component in the relay protection device test platform proposed in this utility model.

[0023] In the diagram: 1. Test cavity; 2. Sealing cover; 3. Drive motor; 4. Drive gear; 5. Pressure boosting gear; 6. Tilting gear; 7. Conversion plate; 8. Limit seat; 9. Air exchange chamber; 10. Air flow chamber; 11. Test air pump; 12. Hydraulic push rod; 13. Wave-turning rack; 14. Limit guide rail; 15. Wave-turning gear; 16. Wave-turning plate. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0025] Example:

[0026] Reference Figures 1 to 6 The relay protection device test platform includes a test cavity 1 and a sealing cover 2. The sealing cover 2 has two mounting holes, and a drive motor 3 is arranged between the two mounting holes. The output end of the drive motor 3 is connected to a drive gear 4 through a drive shaft. Gear assemblies are arranged on both sides of the drive gear 4. The gear assemblies are connected to a conversion plate 7. An airflow cavity 10 is arranged above the gear assemblies.

[0027] The test chamber 1 is filled with insulating oil liquid, and the airflow chamber 10 is filled with hydrogen and methane gas.

[0028] Furthermore, the top end of the test cavity 1 is fixedly connected to the bottom end of the sealing cover 2, the outer wall of the drive motor 3 is fixedly connected to the sealing cover 2, the output end of the drive motor 3 is fixedly connected to the end of the drive gear 4 through the drive shaft, the gear assembly consists of a booster gear 5 and a reversing gear 6, the drive gear 4 meshes with the booster gear 5, the booster gear 5 meshes with the reversing gear 6, the end of the reversing gear 6 is fixedly connected to the side wall of the conversion plate 7 through the rotating shaft, multiple limit seats 8 are fixedly connected to the upper and lower ends of the conversion plate 7, the side wall of the conversion plate 7 is rotatably connected to the inner side wall of the mounting hole on the sealing cover 2, the sealing cover 2 is fixedly connected to the air exchange chamber 9 located on the booster gear 5 and the reversing gear 6, the top end of the air exchange chamber 9 is connected to the air flow chamber 10, and the test air pump 11 is fixedly connected to both the left and right side walls of the test cavity 1;

[0029] It should be noted that the two gas relays to be tested are respectively installed in the limit seats 8 on the conversion plate 7 and secured with bolts. After the limit is set, a test power supply is applied to the gas relays. This is a common existing technical method and will not be elaborated on here. Subsequently, the drive motor 3 is started, which drives the drive gear 4 to rotate through the drive shaft. The rotation of the drive gear 4 will synchronously drive the booster gears 5 on both sides to rotate in the same direction. The rotation of the booster gears 5 will drive the outermost flip gear 6 to rotate in the opposite direction. The rotation of the flip gear 6 drives the conversion plate 7 to rotate through the rotating shaft, thereby connecting the gas relays to be tested. The device is rotated into the test chamber 1, and the gas relay that has been tested is rotated out. The gas relay that has been rotated out is removed, and then the gas relay that needs to be tested next is installed, so that the overall testing efficiency is higher. At the same time, the meshing rotation between the booster gear 5 and the flip gear 6 will force the hydrogen and methane gas in the air exchange chamber 9, which is connected to the air flow chamber 10, into the space below the booster gear 5 and the flip gear 6. Before this, the test air pumps 11 on both sides fill the test chamber 1 with nitrogen, so that the injected hydrogen and methane gas accumulate at the top of the test chamber 1, so that the gas relay under test can sense it and issue an alarm.

[0030] The further advantage of adopting the above method is that, by utilizing the cooperation of the booster gear 5 and the reversing gear 6, while turning the gas relay under test into the test area, the hydrogen and methane gas in the ventilation chamber 9 are forced into the top of the test chamber 1. This simulates the situation where the gas relay generates hydrogen and methane gas and focuses upwards when it encounters a minor transformer fault during daily use. This better meets the subsequent usage requirements of the gas relay, making the test results more reliable and accurate.

[0031] A hydraulic push rod 12 is fixedly connected to the outer wall of the test cavity 1 by a right-angle fixing plate, and the output end of the hydraulic push rod 12 is connected to multiple wave-turning plates 16 through a wave-turning assembly;

[0032] Furthermore, the wave-turning assembly consists of a wave-turning rack 13 and multiple wave-turning gears 15. The output end of the hydraulic push rod 12 is fixedly connected to the end of the wave-turning rack 13. A limit guide rail 14 is fixedly connected to the outer wall of the test cavity 1. The outer wall of the wave-turning rack 13 is slidably connected to the inner wall of the limit guide rail 14. The wave-turning rack 13 meshes with multiple wave-turning gears 15 respectively. The end of the wave-turning gear 15 is fixedly connected to the end of the wave-turning plate 16 through a pin. The pin is rotatably connected to the side wall of the test cavity 1.

[0033] It should be noted that when simulating a major transformer fault, the hydraulic push rod 12 is activated to drive the wave rack 13 to slide back and forth within the limit guide rail 14. The sliding of the wave rack 13 will synchronously drive multiple meshing wave gears 15 to rotate. The rotation of the wave gears 15 will drive the wave plate 16 to flip in the insulating oil in the test cavity 1 through the pin shaft, causing the insulating oil in the test cavity 1 to tumble and stir, resulting in a violent surge of the insulating oil in the test cavity 1. The gas relay is then tested to see if it can work normally under this state.

[0034] The further advantage of adopting the above is that the wave rack 13 and multiple wave gears 15 can drive multiple wave plates 16 to rotate synchronously in the insulating oil, so that the insulating oil surges violently in the test cavity 1, simulating the working environment of the gas relay when a major fault occurs in the transformer, making the test more in line with actual use, and ensuring that the gas relay can work normally under the design threshold of each triggering condition.

[0035] In use, the two gas relays to be tested are installed in the limiting seats 8 on the conversion plate 7 and secured with bolts. After limiting, a test power supply is applied to the gas relays, which is a common existing technique and will not be elaborated further. Then, the drive motor 3 is started, driving the drive gear 4 to rotate via the drive shaft. The rotation of the drive gear 4 synchronously drives the booster gears 5 on both sides to rotate in the same direction. The rotation of the booster gears 5 drives the outermost reversing gear 6 to rotate in the opposite direction. The rotation of the reversing gear 6 drives the conversion plate 7 to rotate via the rotating shaft, thereby rotating the gas relay to be tested into the test cavity 1. The tested gas relay is then rotated out, removed, and a subsequent gas relay to be tested is installed, resulting in higher overall testing efficiency. Simultaneously, the meshing rotation between the booster gear 5 and the tilting gear 6 forces the hydrogen and methane gas in the ventilation chamber 9, which is connected to the airflow chamber 10, into the area below the booster gear 5 and the tilting gear 6. Before this, the test air pumps 11 on both sides fill the test chamber 1 with nitrogen, causing the pressed hydrogen and methane gas to accumulate at the top of the test chamber 1, which triggers the gas relay under test to sense and issue an alarm. In this way, by utilizing the cooperation between the booster gear 5 and the tilting gear 6, while rotating the gas relay under test into the test area, the hydrogen and methane gas in the ventilation chamber 9 are forced into the top of the test chamber 1, simulating the situation where the gas relay generates hydrogen and methane gas and focuses upwards when encountering a small transformer fault during daily use. This better meets the subsequent usage requirements of the gas relay, making the test results more reliable and accurate.

[0036] When simulating a major transformer fault, the hydraulic push rod 12 is activated to drive the wave-turning rack 13 to slide back and forth within the limit guide rail 14. The sliding of the wave-turning rack 13 synchronously drives multiple meshing wave-turning gears 15 to rotate. The rotation of the wave-turning gears 15 drives the wave-turning plate 16 to flip in the insulating oil in the test cavity 1 through the pin shaft, causing the insulating oil in the test cavity 1 to tumble and churn, resulting in a violent surge of insulating oil. The surge of insulating oil impacts the gas relay, and the test is conducted to see if the gas relay can work normally under this condition. In this way, the wave-turning rack 13 and multiple wave-turning gears 15 drive multiple wave-turning plates 16 to flip synchronously in the insulating oil, causing the insulating oil to surge violently in the test cavity 1, simulating the working environment of the gas relay when a major transformer fault occurs. This makes the test more in line with actual use and ensures that the gas relay can work normally under the design threshold of each trigger condition.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A relay protection device test platform, comprising a test cavity (1) and a sealing cover (2), characterized in that, The sealing cover (2) has two mounting holes, and a drive motor (3) is provided between the two mounting holes. The output end of the drive motor (3) is connected to a drive gear (4) through a drive shaft. Gear assemblies are provided on both sides of the drive gear (4). A conversion plate (7) is connected to the gear assembly. An airflow cavity (10) is provided above the gear assembly. A hydraulic push rod (12) is fixedly connected to the outer wall of the test cavity (1) through a right-angle fixing plate. The output end of the hydraulic push rod (12) is connected to multiple wave-turning plates (16) through a wave-turning assembly.

2. The relay protection device test platform according to claim 1, characterized in that, The top of the test cavity (1) is fixedly connected to the bottom of the sealing cover (2), the outer wall of the drive motor (3) is fixedly connected to the sealing cover (2), and the output end of the drive motor (3) is fixedly connected to the end of the drive gear (4) through the drive shaft.

3. The relay protection device test platform according to claim 1, characterized in that, The gear assembly consists of a booster gear (5) and a reversing gear (6). The drive gear (4) meshes with the booster gear (5), and the booster gear (5) meshes with the reversing gear (6).

4. The relay protection device test platform according to claim 3, characterized in that, The end of the flipping gear (6) is fixedly connected to the side wall of the conversion plate (7) via a rotating shaft. Multiple limiting seats (8) are fixedly connected to both the upper and lower ends of the conversion plate (7). The side wall of the conversion plate (7) is rotatably connected to the inner side wall of the mounting hole on the sealing cover (2).

5. The relay protection device test platform according to claim 3, characterized in that, The sealing cover (2) has a ventilation chamber (9) fixedly connected to the booster gear (5) and the reversing gear (6). The top of the ventilation chamber (9) is connected to the airflow chamber (10). The test chamber (1) has a test air pump (11) fixedly connected to both the left and right side walls.

6. The relay protection device test platform according to claim 1, characterized in that, The wave-turning assembly consists of a wave-turning rack (13) and multiple wave-turning gears (15). The output end of the hydraulic push rod (12) is fixedly connected to the end of the wave-turning rack (13). A limiting guide rail (14) is fixedly connected to the outer wall of the test cavity (1). The outer wall of the wave-turning rack (13) is slidably connected to the inner wall of the limiting guide rail (14).

7. The relay protection device test platform according to claim 6, characterized in that, The wave rack (13) meshes with multiple wave gears (15) respectively. The end of the wave gear (15) is fixedly connected to the end of the wave plate (16) through a pin. The pin is rotatably connected to the side wall of the test cavity (1).

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