An explosion-proof performance detection device for a cover

Abstract

A kind of explosion-proof performance detection device of cover, including rack, detection table, workpiece pressing device, workpiece conveying device, detection table is installed on rack, workpiece pressing device is located above detection table, workpiece conveying device includes lifting plate, belt drive mechanism, workpiece tray, both sides of lifting plate are equipped with support plate, belt drive mechanism is installed in the inside of two support plates, belt drive mechanism extends to both sides of detection table, its upper end surface is higher than the upper end surface of detection table, workpiece tray is placed on the belt of belt drive mechanism, lifting device is connected below lifting plate, workpiece tray is equipped with workpiece positioning disc, workpiece positioning disc is equipped with workpiece positioning through-hole, the lower end surface of workpiece positioning disc and the upper end of detection table are sealed contact, detection table is equipped with water inlet, and water inlet is communicated with workpiece positioning through-hole, water pump is connected by high-pressure pipe with water inlet, high-pressure pipe is equipped with pressure acquisition system, the drive system of workpiece pressing device, workpiece conveying device, lifting device, water pressure control system, pressure acquisition system are all connected with PLC control system.

Description

Technical Field

[0001] The utility model relates to the field of explosion-proof performance detection, in particular to an explosion-proof performance detection device for a cover. Background Art

[0002] In order to ensure the quality and performance of explosion-proof products, it is generally necessary to detect the explosion-proof performance of the explosion-proof products before they leave the factory. The existing explosion-proof performance detection of explosion-proof products is usually carried out by applying pressure to the outside of the explosion-proof product to detect its pressure resistance and compression resistance, so as to reflect its explosion-proof performance. For example, in the invention patent with the publication number CN113670737A, a detection device for chemical explosion-proof products is provided, which places the chemical explosion-proof product on an explosion-proof detection platform, then uses a hydraulic detection device to increase pressure, and detects the pressure resistance of the chemical explosion-proof product by applying different forces and continuously increasing pressure. However, this detection device that applies mechanical pressure to the surface of the product cannot perform internal pressure-bearing explosion-proof detection for components with internal cavities such as covers. When the existing components with internal cavities such as covers are subjected to internal pressure-bearing explosion-proof detection, the detection is mainly carried out by operators through manual measurement, manual judgment of detection results, and manual recording of detection data. Specifically, the operator places the cover on the test bench, then manually rotates the T-shaped screw rod of the pressing device to press down until the cover is pressed tightly, then locks the T-shaped screw rod, then the operator manually starts the booster water pump, observes the pressure change and pressure maintaining condition of the water pressure gauge, judges whether the test result is qualified, after completion, the operator manually opens the drain valve to drain water, finally removes the tooling and takes out the cover, and records the cover code and test result. This detection mode has low production efficiency, high labor intensity, cannot guarantee the accuracy and consistency of detection results, takes a long time to trace detection data, and is difficult to manage historical detection data.

[0003] Therefore, there is an urgent need for a device with high detection efficiency and high accuracy and consistency of detection processes. Summary of the Invention

[0004] Aiming at the above existing problems, the utility model provides an explosion-proof performance detection device for a cover, which greatly improves the working efficiency, reduces the manual labor intensity of the detection process, and ensures the accuracy and consistency of the detection process.

[0005] The technical solution of this utility model is as follows: a device for testing the explosion-proof performance of a cover, comprising a frame, and a testing platform, a workpiece clamping device, and a workpiece conveying device mounted on the frame. The testing platform is fixedly mounted on the frame, and the workpiece clamping device is located above the testing platform. The workpiece conveying device includes a lifting plate, two belt drive mechanisms, and a workpiece tray. Vertical support plates are respectively provided on both sides of the lifting plate, and the two support plates extend in a cantilever shape. A belt drive mechanism is installed on the inner side of each support plate, extending to both sides of the testing platform. The upper surface of the belt drive mechanism is higher than the upper surface of the testing platform. The workpiece tray is placed on the two belt drive mechanisms. On the belt, the lifting plate is fixedly connected to a lifting device, which is located below the lifting plate and is used to drive the lifting plate to rise and fall. A workpiece positioning plate is detachably connected to the workpiece tray. The workpiece positioning plate is provided with a workpiece positioning through hole. The lower end face of the workpiece positioning plate is used for sealing contact with the upper end of the inspection table. The inspection table is provided with a water inlet that communicates with the workpiece positioning through hole of the positioning plate. A water pump of a water pressure control system is connected to the water inlet through a high-pressure pipe. A pressure acquisition system is installed on the high-pressure pipe. The drive systems of the workpiece clamping device, the workpiece conveying device, and the lifting device, as well as the water pressure control system and the pressure acquisition system, are electrically connected to the PLC control system.

[0006] Preferably, the belt drive mechanism includes a belt conveyor pulley and a belt. The belt is mounted on the belt conveyor pulley, and the belt conveyor pulley is mounted on the inner side of the support plate. A first through hole is provided on the lifting plate, and a first motor is provided below the lifting plate. The first motor is electrically connected to a PLC control system. A belt passes through the first through hole, with one end connected to the output end of the first motor and the other end connected to a drive shaft. The two ends of the drive shaft are respectively connected to the belt conveyor pulleys on the two belt drive mechanisms.

[0007] Preferably, a loading platform is provided on the front side of the workpiece conveying device, and a belt conveyor is provided on the loading platform. The belt conveyor includes a connecting plate, and upright side plates are provided on both sides of the connecting plate. Multiple second belt conveyor wheels are provided on both side plates for mounting belts. A second through hole is provided on the connecting plate, and a second motor is provided below the connecting plate. The second motor is electrically connected to a PLC control system. A belt passes through the second through hole, with one end connected to the output end of the second motor and the other end connected to a second drive shaft. The two ends of the second drive shaft are respectively connected to the second belt conveyor wheels on the side plates for transmission.

[0008] Preferably, the workpiece clamping device includes a servo motor, a reducer, a lead screw, and a cover clamping fixture. The servo motor is electrically connected to a PLC control system. The output end of the servo motor is connected to the reducer. The output end of the reducer is connected to the lead screw. The lead screw is connected to a slot plate. A pressure sensor is disposed between the lead screw and the slot plate. The pressure sensor is electrically connected to the PLC control system. The slot plate engages with the cover clamping fixture via a slot. Multiple reinforcing rods are disposed on the lower end face of the cover clamping fixture.

[0009] Preferably, a sensor group for detecting the position of the workpiece tray is provided on the outer side of the belt support plate, and the sensor group is electrically connected to the PLC control system.

[0010] Preferably, the workpiece positioning through hole wall of the workpiece positioning disk extends downward with an annular flange, the workpiece tray is provided with a mounting hole, and the annular flange is inserted into the mounting hole.

[0011] Preferably, an annular groove is provided on the upper surface of the testing platform, and a sealing ring is fixedly provided in the annular groove. The sealing ring protrudes from the upper surface of the testing platform, and the sealing ring contacts the bottom of the annular flange to form a seal.

[0012] Preferably, the testing platform is provided with positioning pins, and the workpiece tray is provided with positioning holes, with the positioning pins corresponding to the positioning holes.

[0013] Preferably, an RFID chip is provided on the workpiece positioning plate, and an RFID reader is provided on the workpiece tray, the RFID reader being connected to the PLC control system.

[0014] Preferably, a limiting bracket is provided on the rear side of the testing station.

[0015] The advantages of this invention are as follows: This invention processes sensor data through a PLC control system and controls the drive systems of the workpiece clamping device, workpiece conveying device, and lifting device based on the sensor data, thereby achieving automated detection of the explosion-proof performance of the cover parts. Furthermore, the PLC control system is connected to a host computer system, and the time, sensor data, and cover workpiece information controlled by the PLC control system for the drive systems of the workpiece clamping device, workpiece conveying device, and lifting device are all stored in the host computer system, facilitating subsequent data management, reducing manual labor intensity, improving detection efficiency, and ensuring the accuracy and consistency of detection results. Attached Figure Description

[0016] Figure 1 This is a first structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the second structure of the present invention; Figure 3This is a schematic diagram of the third structure of this utility model; Figure 4 This is a first structural schematic diagram of the feeding platform and testing platform of this utility model; Figure 5 This is a second structural schematic diagram of the feeding platform and testing platform of this utility model; Figure 6 This is a schematic diagram of the structure of the testing table and workpiece clamping device of this utility model; Figure 7 This is a schematic diagram of the workpiece tray of this utility model; Figure 8 This is a cross-sectional view of the workpiece tray of this utility model. Detailed Implementation

[0017] See Figures 1 to 8 An explosion-proof performance testing device for a cover includes a frame 1, a testing platform 2, a workpiece clamping device 100, and a workpiece conveying device 3 mounted on the frame 1. The testing platform 2 is fixedly mounted on the frame 1, and the workpiece clamping device 100 is located above the testing platform 2. The workpiece clamping device 100 includes a servo motor 10, a reducer 11, a lead screw 12, and a cover clamping fixture 14. The output end of the servo motor 10 is connected to the reducer 11, and the output end of the reducer 11 is connected to the lead screw 12. The lead screw 12 is connected to a slot plate 13, and a pressure sensor 19 is disposed between the lead screw 12 and the slot plate 13. The pressure sensor 19 is electrically connected to a PLC control system 23. The pressure sensor 19 detects the pressure data applied by the lead screw 12 to the slot plate 13 in real time and transmits the pressure data to the PLC control system 23 in real time. The PLC control system 23 controls the speed of the servo motor 10 in real time according to the pressure data to avoid excessive pressure and damage to components. The slotted plate 13 engages with the cover clamping fixture 14 via a slot. This engagement is necessary because there are many models of cover workpieces 26, and different models require different cover clamping fixtures 14. The slotted plate 13 engages with the cover clamping fixture 14, facilitating quick disassembly and installation of the fixture when clamping different models of cover workpieces 26, saving time and improving work efficiency. Multiple reinforcing rods 141 are provided on the lower end face of the cover clamping fixture 14 to increase its strength and prevent inaccurate test results due to insufficient strength and unstable clamping when water pressure impacts the cover workpiece 26 during explosion-proof performance testing.

[0018] The workpiece conveying device 3 includes a lifting plate 33, two belt drive mechanisms, and a workpiece tray 5. Upright support plates 31 are respectively installed on both sides of the lifting plate 33, extending in a cantilever shape. A belt drive mechanism is installed on the inner side of each support plate 31, extending to both sides of the inspection table 2. Each belt drive mechanism includes a belt conveyor wheel 32 and a belt. The belt is mounted on the belt conveyor wheel 32, which is installed on the inner side of the support plate 31. A first through hole is provided on the lifting plate 33. A first motor 35 is located below the lifting plate 33. A belt passes through the first through hole, with one end connected to the output end of the first motor 35 and the other end connected to a drive shaft 34. Both ends of the drive shaft 34 are connected to the belt conveyor wheels 32 on the two belt drive mechanisms. The upper surface of the belt drive mechanism is higher than the upper surface of the testing table 2. The workpiece tray 5 is placed on the belts of the two belt drive mechanisms, ensuring that the workpiece tray 5 can be conveyed to the upper surface of the testing table 2 by the belts of the two belt drive mechanisms, thereby ensuring that the workpiece tray 5 can fall onto the testing table 2, so that the workpiece 26 can be pressed by the workpiece clamping device 100 for explosion-proof performance testing. The lifting plate 33 is fixedly connected to a lifting device 4, which is a cylinder. The piston rod of the cylinder is connected to the lifting plate 33, and the cylinder is located below the lifting plate 33. The lifting plate 33 is driven to rise and fall by the cylinder, so that the entire workpiece conveying device 3 can rise and fall. This ensures that when the workpiece tray 5 is conveyed to the upper surface of the testing table 2 by the belts of the belt drive mechanism, the lifting plate 33 is driven to rise and fall by the cylinder, so that the workpiece tray 5 falls onto the testing table 2. A limiting bracket 20 is provided on the rear side of the testing table 2 to limit the workpiece tray 5, ensuring that the workpiece tray 5 is directly above the testing table 2 and preventing the workpiece tray 5 from rushing out of the belt drive mechanism. A workpiece positioning plate 6 is detachably connected to the workpiece tray 5. The workpiece positioning plate 6 has a workpiece positioning through hole 62, and an annular flange 621 extends downward from the wall of the workpiece positioning through hole 62. The workpiece tray 5 has a mounting hole 52, and the annular flange 621 is inserted into the mounting hole 52. The purpose of this design is that different models of cover workpieces 26 require different workpiece positioning plates 6. The quick-detachable connection structure between the workpiece tray 5 and the workpiece positioning plate 6 facilitates quick disassembly and installation when inspecting different models of cover workpieces 26, saving time and improving work efficiency. An annular groove is provided on the upper end face of the inspection table 2. A sealing ring 22 is fixedly installed in the annular groove, and the sealing ring 22 protrudes 2mm from the upper end face of the inspection table 2, so that the sealing ring 22 can contact the bottom of the annular flange 621 to form a seal.The testing platform 2 is equipped with positioning pins 25, and the workpiece tray 5 is equipped with positioning holes 53. The positioning pins 25 and positioning holes 53 are positioned correspondingly. Through the positioning pins 25 and positioning holes 53, the testing platform 2 positions the workpiece tray 5, preventing the workpiece tray 5 from moving and avoiding it from falling off the testing platform 2. The testing platform 2 is equipped with a water inlet 21 that communicates with the workpiece positioning through hole 62 of the positioning plate 6. A water pump of a water pressure control system 8 is connected to the water inlet 21 through a high-pressure pipe 7. A pressure acquisition system 9 is installed on the high-pressure pipe 7. The pressure acquisition system 9 is mainly based on a high-precision pressure transmitter. In this implementation example, the PDS product purchased is from Chongqing Chuanyi Measurement and Control Co., Ltd. The pressure acquisition system 9 can monitor and acquire the water pressure value data inside the cover in real time. The servo motor 10 of the workpiece clamping device 100, the first motor 35 of the workpiece conveying device 3, the lifting device 4 (cylinder), and the water pump of the water pressure control system 8 and the pressure transmitter of the pressure acquisition system 9 are electrically connected to the PLC control system 23. The through-hole PLC control system 23 controls the automated detection of the explosion-proof performance of the cover. The PLC control system 23 is communicatively connected to a host computer system 24. The data from the PLC control system 23 is transmitted to the host computer system 24 for storage. The host computer system 24 is also connected to inspection equipment in other processes and stores the corresponding data of other inspection equipment to form a data summary for easy subsequent retrieval.

[0019] In this embodiment, an RFID chip 61 is provided on the workpiece positioning disk 6, and an RFID reader 51 is provided on the workpiece tray 5. The RFID reader 51 is connected to the PLC control system 23. The RFID chip 61 contains information such as the model, ID, and size of the covered workpiece 26. The RFID reader 51 reads the information of the covered workpiece 26 in the RFID chip 61 and sends the information to the PLC control system 23. The PLC control system 23 controls the servo motor 10 of the workpiece clamping device 100, the first motor 35 of the workpiece conveying device 3, and the water pump of the water pressure control system 8 according to this information to realize targeted automated explosion-proof performance testing. At the same time, the PLC control system 23 transmits this information to the host computer system 24 for storage.

[0020] In this embodiment, a sensor group for detecting the workpiece pallet's arrival is provided on the outer side of the belt support plate 31. This sensor group is electrically connected to the PLC control system 23. The sensor group includes a first sensor 17 and a second sensor 18, with the first sensor 17 located in front of the second sensor 18. When the first sensor 17 detects the workpiece pallet 5, it transmits a signal to the PLC control system, indicating that the workpiece pallet 5 is about to arrive. Upon receiving this signal, the PLC control system controls the first motor 35 of the workpiece conveying device 3 to reduce its speed, causing the belt drive mechanism to slowly convey the workpiece pallet 5. This buffering setting improves the positioning accuracy of the workpiece pallet 5, reduces collisions between the workpiece pallet 5 and the limiting bracket 20, and reduces the start-stop load on the motor. When the second sensor 18 detects the workpiece pallet 5, it transmits a signal to the PLC control system, indicating that the workpiece pallet 5 is in place. Upon receiving this signal, the PLC control system controls the first motor 35 of the workpiece conveying device 3 to stop operating.

[0021] In this embodiment, a loading platform 15 is provided on the front side of the workpiece conveying device, and a belt conveyor 16 is provided on the loading platform 15. The belt conveyor 16 includes a connecting plate 163, and upright side plates 161 are respectively provided on both sides of the connecting plate 163. Multiple second belt conveyor pulleys 162 are provided on both side plates 161 for installing belts. A second through hole is provided on the connecting plate 163, and a second motor 164 is provided below the connecting plate 163. The second motor 164 is electrically connected to the PLC control system 23. A belt passes through the second through hole, with one end connected to the output end of the second motor 164 and the other end connected to the second drive shaft 165. The two ends of the second drive shaft 165 are respectively connected to the second belt conveyor pulleys 162 on the two side plates 161 for transmission. By providing the loading platform 156, it is convenient for the operator to place the cover workpiece 26.

[0022] The working process of this utility model is as follows: First, the operator inserts the workpiece 26 covered by the cover into the workpiece positioning through hole 62 of the corresponding model workpiece positioning disk 6 and performs a sealing treatment. Then, the annular flange 621 of the workpiece positioning disk 6 is inserted into the mounting hole 52 of the workpiece tray 5 placed on the conveyor belt of the loading table 15 to form a limiting fixation. Then, the detection device is started, and the RFID reader on the workpiece tray 5 reads the information of the RFID chip 61 on the workpiece positioning disk 6 and sends the information to the PLC control system 23. The PLC control system 23 controls the detection device according to this information, so that the workpiece tray 5 is conveyed forward with the conveyor belt. When the first sensor After the workpiece pallet 5 is detected by sensor 17, a signal is transmitted to the PLC control system. Upon receiving the signal, the PLC control system controls the first motor 35 of the workpiece conveyor 3 to reduce its speed, causing the belt drive mechanism to slowly convey the workpiece pallet 5 forward. When the second sensor 18 detects the workpiece pallet 5, it transmits a signal to the PLC control system 23. Upon receiving the signal, the PLC control system 23 controls the first motor 35 of the workpiece conveyor 3 to stop working and limits it by the limit bracket 20, so that the workpiece pallet 5 is positioned directly above the detection table 2. Then, the PLC control system 23 controls the cylinder to retract, causing the entire workpiece conveyor 3 to move downwards. The workpiece tray 5 is lowered onto the inspection table 2, simultaneously positioning the limiting pin 25 of the inspection table 2 with the positioning hole 53 on the workpiece tray 5, and bringing the annular flange 621 of the workpiece positioning plate 6 into contact with the sealing ring 22 on the inspection table 2. Then, the PLC control system 23 controls the servo motor 10 to operate, causing the lead screw 12 to press down, driving the cover clamping fixture 14 to press down the cover workpiece 26. Pressure data is detected by the pressure sensor 19 and sent to the PLC control system 23. The PLC control system 23 adjusts the speed of the servo motor 10 in real time based on the pressure data to prevent excessive pressure. After clamping is completed, the PLC control system 23... The water pump of the water pressure control system 8 is turned on, and water is continuously poured into the cover workpiece 26 through the high-pressure pipe 7. The pressure acquisition system 9 installed on the high-pressure pipe 7 collects the water pressure value in real time and feeds it back to the PLC control system 23 until the water pressure reaches the preset value, which is 2.3 MPa in this embodiment. Then, the PLC control system 23 controls the water pump of the water pressure control system 8 to turn off. At this time, the inner cavity of the cover workpiece 26 is pressurized at the required 2.3 MPa. After 15 seconds, if the water pressure value collected by the pressure acquisition system 9 is not lower than 2.2 MPa, the explosion-proof performance of the cover workpiece 26 is qualified. If the water pressure value collected by the pressure acquisition system 9 is lower than 2.2 MPa, the explosion-proof performance of the cover workpiece 26 is qualified.If the pressure is 2MPa, then the cover workpiece 26 has a strength design defect or a casting defect, and its explosion-proof performance is unqualified. After the inspection, the PLC control system 23 controls the water pressure control system 8 to open the drain valve on the high-pressure pipe 7 to drain the water. Then, the PLC control system 2 controls the servo motor 10 to move the cover clamping fixture 14 upward, and then controls the piston rod of the cylinder to extend, causing the entire workpiece conveying device 3 to rise. Then, it controls the first motor 35 and the second motor 164 to reverse the belt and convey the workpiece tray 5. Finally, the operator removes the cover workpiece 26 for subsequent inspections.

[0023] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications made to the present utility model by those skilled in the art without departing from the spirit of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A device for testing the explosion-proof performance of a cover, characterized in that: The system includes a frame (1), and a testing table (2), a workpiece clamping device (100), and a workpiece conveying device (3) mounted on the frame (1). The testing table (2) is fixedly mounted on the frame (1), and the workpiece clamping device (100) is located above the testing table (2). The workpiece conveying device (3) includes a lifting plate (33), two belt drive mechanisms, and a workpiece tray (5). Vertical support plates (31) are respectively mounted on both sides of the lifting plate (33), and the two support plates (31) extend in a cantilever shape. A belt drive mechanism is installed on the inner side of each support plate (31), and the belt drive mechanisms extend to both sides of the testing table (2). The upper surface of the belt drive mechanism is higher than the upper surface of the testing table (2). The workpiece tray (5) is placed on the belts of the two belt drive mechanisms. The lifting plate (33) is fixedly connected to a lifting device (100). 4) The lifting device (4) is located below the lifting plate (33) and is used to drive the lifting plate (33) to lift. A workpiece positioning plate (6) is detachably connected to the workpiece tray (5). The workpiece positioning plate (6) is provided with a workpiece positioning through hole (62). The lower end face of the workpiece positioning plate (6) is used to seal and contact the upper end of the testing table (2). The testing table (2) is provided with a water inlet (21) that communicates with the workpiece positioning through hole (62) of the positioning plate (6). The water pump of a water pressure control system (8) is connected to the water inlet (21) through a high pressure pipe (7). A pressure acquisition system (9) is provided on the high pressure pipe (7). The drive system of the workpiece pressing device (100), the workpiece conveying device (3), the lifting device (4), the water pressure control system (8), and the pressure acquisition system (9) are electrically connected to the PLC control system (23).

2. The explosion-proof performance testing device for the cover according to claim 1, characterized in that: The belt drive mechanism includes a belt conveyor wheel (32) and a belt. The belt is mounted on the belt conveyor wheel (32). The belt conveyor wheel (32) is mounted on the inner side of the support plate (31). A first through hole is provided on the lifting plate (33). A first motor (35) is provided below the lifting plate (33). The first motor (35) is electrically connected to the PLC control system (23). A belt passes through the first through hole, with one end connected to the output end of the first motor (35) and the other end connected to a transmission shaft (34). The two ends of the transmission shaft (34) are respectively connected to the belt conveyor wheel (32) on the two belt drive mechanisms.

3. The explosion-proof performance testing device for the cover according to claim 1, characterized in that: A loading platform (15) is provided on the front side of the workpiece conveying device. A belt conveyor (16) is provided on the loading platform (15). The belt conveyor (16) includes a connecting plate (163). Upright side plates (161) are provided on both sides of the connecting plate (163). Multiple second belt conveyor wheels (162) are provided on both side plates (161) for installing belts. A second through hole is provided on the connecting plate (163). A second motor (164) is provided below the connecting plate (163). The second motor (164) is electrically connected to the PLC control system (23). A belt passes through the second through hole. One end is connected to the output end of the second motor (164), and the other end is connected to the second transmission shaft (165). The two ends of the second transmission shaft (165) are respectively connected to the second belt conveyor wheels (162) on the two side plates (161).

4. The explosion-proof performance testing device for the cover according to claim 1, characterized in that: The workpiece clamping device (100) includes a servo motor (10), a reducer (11), a lead screw (12), and a cover clamping fixture (14). The servo motor (10) is electrically connected to a PLC control system (23). The output end of the servo motor (10) is connected to the reducer (11). The output end of the reducer (11) is connected to the lead screw (12). The lead screw (12) is connected to a slot plate (13). A pressure sensor (19) is provided between the lead screw (12) and the slot plate (13). The pressure sensor (19) is electrically connected to the PLC control system (23). The slot plate (13) clamps the cover clamping fixture (14) through the slot. Multiple reinforcing rods (141) are provided on the lower end face of the cover clamping fixture (14).

5. The explosion-proof performance testing device for the cover according to claim 1, characterized in that: The outer side of the belt support plate (31) is provided with a sensor group for detecting the position of the workpiece tray, and the sensor group is electrically connected to the PLC control system (23).

6. The explosion-proof performance testing device for the cover according to claim 1, characterized in that: The workpiece positioning through hole (62) of the workpiece positioning disk (6) extends downward with an annular flange (621), and the workpiece tray (5) is provided with a mounting hole (52), and the annular flange (621) is inserted into the mounting hole (52).

7. The explosion-proof performance testing device for the cover according to claim 6, characterized in that: An annular groove is provided on the upper surface of the testing platform (2), and a sealing ring (22) is fixedly provided in the annular groove. The sealing ring (22) protrudes from the upper surface of the testing platform (2), and the sealing ring (22) contacts the bottom of the annular flange (621) to form a seal.

8. The explosion-proof performance testing device for the cover according to claim 1, characterized in that: The testing table (2) is provided with a positioning pin (25), and the workpiece tray (5) is provided with a positioning hole (53). The positioning pin (25) and the positioning hole (53) are in the same position.

9. The explosion-proof performance testing device for the cover according to claim 1, characterized in that: An RFID chip (61) is provided on the workpiece positioning plate (6), and an RFID reader (51) is provided on the workpiece tray (5). The RFID reader (51) is connected to the PLC control system (23).

10. The explosion-proof performance testing device for the cover according to claim 1, characterized in that: A limiting bracket (20) is provided on the rear side of the testing station (2).

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