An automatic testing device for level switches

Abstract

The present invention relates to an automated testing device, and in particular to an automated testing device for a level switch, comprising a frame, a lifting servo module, a lifting detection mechanism, a level switch, a circulating material suction machine, an industrial computer, a water tank, a pellet box, a torque testing assembly, and a microwave switch testing assembly; the torque detection assembly is fixedly mounted on the inner side of the frame and located above the water tank; the microwave switch testing assembly is mounted on the left side of the frame; the present invention can be used to test various types of level switches, such as tuning fork switches, radio frequency admittance switches, paddle switches, and microwave switches; medium testing is performed using liquid or solid materials close to the site, which is closer to the site working conditions and has high test accuracy; the overall test accuracy is improved, the test efficiency is increased, and labor input is reduced.

Description

Technical Field

[0001] The invention relates to an automatic testing device, in particular to an automatic testing device for a level switch. Background Art

[0002] Level switches are primarily used to detect the position of materials, whether liquids, solid particles, or powders. When the sensor switches between contacting and disengaging the material, its output signal switches. As a crucial parameter for field measurement, level detection plays a crucial role in industrial automation. Level instruments are categorized as either switch-type or continuous-measurement instruments. Switch-type instruments employ a variety of measurement principles, including tuning forks, radio frequency admittance, rotary paddles, and microwave switches.

[0003] The existing level switch test adopts manual testing method, sometimes by hand touch, which cannot simulate the actual test conditions, has low test accuracy and low test efficiency. In order to change the above shortcomings, it is necessary to design an automatic test device for level switches, which can be used to test various types of level switches such as tuning fork switches, radio frequency admittance switches, paddle switches and microwave switches. Summary of the Invention

[0004] The purpose of the present invention is to provide an automatic testing device for a level switch, so as to change the phenomenon that the previous manual test measurement is inaccurate and the measurement efficiency is low.

[0005] An automatic testing device for a level switch, comprising a frame, a lifting servo module, a lifting detection mechanism, a level switch, a circulating material suction machine, an industrial computer, a water tank, a pellet box, a torque testing component, and a microwave switch testing component;

[0006] The lifting servo module is arranged in the middle of the frame, and the lifting detection mechanism is installed on the slide of the lifting servo module; the level switch is assembled and installed in the lifting detection mechanism; the water tank and the pellet box are designed to be close to each other and integrated, and a material box cylinder is provided at the bottom for position switching; the circulating suction machine is connected to the pellet box;

[0007] The torque detection assembly is fixedly installed on the inner side of the frame and is located above the water tank; the microwave switch test assembly is installed on the left side of the frame; the lifting servo module, lifting detection mechanism, level switch, circulating suction machine, torque test assembly, microwave switch test assembly and material box cylinder are all connected to the industrial computer signal;

[0008] Furthermore, the lifting detection mechanism includes a level switch positioning seat, a first probe support, a first probe cylinder, a first probe and a potentiometer adjustment mechanism; the level switch is installed in the switch positioning seat; the first probe cylinder and the potentiometer adjustment mechanism are both connected to the industrial computer signal;

[0009] Furthermore, the torque test assembly includes a torque test mechanism, a tester cylinder and a rotation-blocking spindle clamping mechanism; the torque test mechanism is installed above the water tank; the tester cylinder is connected to the industrial computer signal;

[0010] Furthermore, the microwave switch test assembly includes a microwave switch transmitting end, a microwave switch receiving end, a push plate bracket, a push plate cylinder, and a control push plate; the microwave switch transmitting end is arranged on the transmitting end bracket, and the microwave switch receiving end is arranged on the receiving end bracket; the microwave switch transmitting end, the microwave switch receiving end, and the push plate cylinder are all connected to the industrial computer signal;

[0011] Furthermore, a third probe cylinder is provided on the transmitting end bracket, and a third probe is provided at the telescopic end of the third probe cylinder;

[0012] Furthermore, a second probe cylinder is provided on the receiving end bracket, and a second probe is provided at the telescopic end of the second probe cylinder;

[0013] The beneficial effects of the present invention are:

[0014] The present invention can test various types of level switches, such as tuning fork switches, radio frequency admittance switches, rotary paddle switches, and microwave switches. Liquid or solid materials close to the on-site conditions are used for medium testing, which is closer to on-site working conditions and has high test accuracy. A lifting servo module is used to move the level switch up and down using a screw slide, and the initial position and final test position are automatically controlled according to sensors of different lengths. The automated level switch test device uses a host computer and PLC integrated control system, making the system more intelligent and easier to manage and deploy. This improves test accuracy and efficiency overall, while reducing labor input. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front schematic diagram of the present invention;

[0016] Figure 2 It is an oblique schematic diagram of the present invention;

[0017] Figure markings: 1-servo lifting module, 2-lifting detection mechanism, 201-first probe cylinder, 202-first probe support, 203-potentiometer adjustment mechanism, 204-first probe, 205-switch positioning seat, 3-level switch, 4-circulation suction machine, 5-industrial computer, 6-water tank, 7-granule box, 8-material box cylinder, 9-second probe cylinder, 10-second probe, 11-bracket, 12-micro-blog switch receiving end, 13-push plate bracket, 14-control push plate, 15-push plate cylinder, 16-transmitter bracket, 17-micro-blog switch transmitting end, 18-third probe, 19-third probe cylinder, 20-frame, 21-anti-rotation spindle clamping mechanism, 22-torque testing mechanism, 23-tester cylinder. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] refer to Figure 1-2 , an automatic test device for a level switch, comprising a frame 20, a lifting servo module 1, a lifting detection mechanism 2, a level switch 3, a circulating material suction machine 4, an industrial computer 5, a water tank 6, a pellet box 7, a torque test component and a microwave switch test component;

[0020] The lifting servo module 1 is arranged in the middle of the frame 20, and the lifting detection mechanism 2 is mounted on the slide of the lifting servo module 1; the level switch 3 is assembled and installed in the lifting detection mechanism 2; the water tank 6 and the pellet box 7 are designed to be close to each other and integrated, and a material box cylinder 8 is provided at the bottom for position switching; the circulating suction machine 4 is connected to the pellet box 7;

[0021] The torque detection assembly is fixedly mounted on the inner side of the frame 20 and is located above the water tank 6; the microwave switch test assembly is mounted on the left side of the frame 20; the lifting servo module 1, the lifting detection mechanism 2, the level switch 3, the circulating material suction machine 4, the torque test assembly, the microwave switch test assembly and the material box cylinder 8 are all connected to the industrial computer 5 by signal connection;

[0022] In this embodiment, the automatic level switch testing device is constructed using a frame. A lifting servo module 2 is positioned in the middle. Its upper slide moves up and down, enabling precise positioning during testing of tuning forks, radio frequency admittance sensors, and rotary dampers. Below, a water tank 6 and a pellet box 7 are positioned for on-site simulation testing of liquid and solid media. A microwave switch test is located on the left side of frame 20. A cylinder pushes a push plate to simulate material for microwave switch testing. If the test target is a liquid, the material moves to water tank 6 below frame 1; if the test target is a solid, the material moves to pellet box 7. Water tank 6 and pellet box 7 are connected and controlled by a pellet box cylinder 8. By default, water tank 6 is positioned below level switch 3. If the test target is a solid, pellet box cylinder 8 pushes pellet box 7 below level switch 3. During solid testing, the material in the pellet box is required to scatter the material onto the sensor of level switch 3. Therefore, a circulating material suction machine 4 is configured to perform both suction and scattering operations.

[0023] Furthermore, the lifting detection mechanism 2 includes a level switch positioning seat 205, a first probe support 202, a first probe cylinder 201, a first probe 204 and a potentiometer adjustment mechanism 203; the level switch 3 is installed in the switch positioning seat 205; the first probe cylinder 201 and the potentiometer adjustment mechanism 203 are both connected to the industrial computer 5 for signal connection;

[0024] In this embodiment, the industrial computer 5 is controlled by a PLC program, and by identifying the level switch 3, the length of the sensor is determined, and an initial position is given to the level switch 3 according to the sensor length. The potentiometer adjustment mechanism 203 is used for adjustment, and then the level switch 3 is installed on the level switch positioning seat 205. After the installation and positioning are completed, the first probe 204 is controlled by the first probe cylinder 201 to be pressed down to the relevant contacts of the electronic unit of the level switch 3, and the 24V or 220V power supply is turned on to energize the level switch 3.

[0025] Furthermore, the torque test assembly includes a torque test mechanism 22, a tester cylinder 23 and a rotation-blocking spindle clamping mechanism 21; the torque test mechanism 21 is installed above the water tank; the tester cylinder 23 is connected to the industrial computer 5 by signal;

[0026] In this embodiment, the torque testing mechanism 22 is installed with the anti-rotation spindle clamping mechanism 21, and the anti-rotation spindle clamping mechanism 21 is pushed to the position below the anti-rotation spindle by the tester cylinder 23, and then the hexagonal clamping above the blade assembly on the anti-rotation spindle is tested. After the torque is tested, the cylinder retreats, and the industrial computer 5 reads the torque value and records and saves it, and the test ends at this time.

[0027] Furthermore, the microwave switch test assembly includes a microwave switch transmitting end 17, a microwave switch receiving end 12, a push plate bracket 13, a push plate cylinder 15, and a control push plate 14; the microwave switch transmitting end 17 is arranged on the transmitting end bracket 16, and the microwave switch receiving end 12 is arranged on the receiving end bracket 11; the microwave switch transmitting end 17, the microwave switch receiving end 12, and the push plate cylinder 15 are all connected to the industrial computer 5 for signal connection;

[0028] In this embodiment, the microwave switch transmitting end 17 and the microwave switch receiving end 12 are relatively fixedly arranged.

[0029] Furthermore, a third probe cylinder 19 is provided on the transmitting end bracket 16, and a third probe 18 is provided at the telescopic end of the third probe cylinder 19; a second probe cylinder 9 is provided on the receiving end bracket 11, and a second probe 10 is provided at the telescopic end of the second probe cylinder 9;

[0030] In this embodiment, the push plate cylinder 15 arranged on the push plate bracket 13 controls the push plate 14 to simulate feeding between the microwave switches. The second probe 10 and the third probe 18 are both connected at the same time, cooperating with the push plate 14 to perform a complete microwave switch test.

[0031] The present invention can test various types of level switches, such as tuning fork switches, radio frequency admittance switches, rotary paddle switches, and microwave switches. Liquid or solid materials close to the on-site conditions are used for medium testing, which is closer to on-site working conditions and has high test accuracy. A lifting servo module is used to move the level switch up and down using a screw slide, and the initial position and final test position are automatically controlled according to sensors of different lengths. The automated level switch test device uses a host computer and PLC integrated control system, making the system more intelligent and easier to manage and deploy. This improves test accuracy and efficiency overall, while reducing labor input.

[0032] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them with similar methods without departing from the scope defined by the spirit of the present invention.

Claims

1. An automatic testing device for a level switch, characterized in that: It includes a frame (20), a lifting servo module (1), a lifting detection mechanism (2), a level switch (3), a circulating suction machine (4), an industrial computer (5), a water tank (6), a pellet box (7), a torque test component and a microwave switch test component; The lifting servo module (1) is arranged in the middle of the frame (20), and the lifting detection mechanism (2) is installed on the slide of the lifting servo module (1); the level switch (3) is assembled and installed in the lifting detection mechanism (2); the water tank (6) and the pellet box (7) are designed to be close to each other and integrated, and a material box cylinder (8) is provided at the bottom for position switching; the circulating suction machine (4) is connected to the pellet box (7); The torque test assembly is fixedly mounted on the inner side of the frame (20) and is located above the water tank (6); the microwave switch test assembly is mounted on the left side of the frame (20); the lifting servo module (1), the lifting detection mechanism (2), the level switch (3), the circulating suction machine (4), the torque test assembly, the microwave switch test assembly and the material box cylinder (8) are all connected to the industrial computer (5) for signal communication; The lifting detection mechanism (2) comprises a level switch positioning seat (205), a first probe support (202), a first probe cylinder (201), a first probe (204) and a potentiometer adjustment mechanism (203); the level switch (3) is installed in the switch positioning seat (205); the first probe cylinder (201) and the potentiometer adjustment mechanism (203) are both connected to the industrial control computer (5) by signal; The torque test assembly comprises a torque test mechanism (22), a tester cylinder (23) and a rotation-blocking spindle clamping mechanism (21); the torque test mechanism (22) is installed above the water tank; the tester cylinder (23) is connected to an industrial computer (5) by signal; The microwave switch test assembly comprises a microwave switch transmitting end (17), a microwave switch receiving end (12), a push plate bracket (13), a push plate cylinder (15) and a control push plate (14); the microwave switch transmitting end (17) is arranged on the transmitting end bracket (16), and the microwave switch receiving end (12) is arranged on the receiving end bracket (11); the microwave switch transmitting end (17), the microwave switch receiving end (12) and the push plate cylinder (15) are all connected to the industrial control computer (5) for signal connection; The industrial computer is controlled by the PLC program. By identifying the level switch, it determines the length of the sensor and gives the level switch an initial position according to the sensor length. The potentiometer adjustment mechanism adjusts the position. The level switch is installed on the level switch positioning seat. The first probe is controlled by the first probe cylinder to press down to the relevant contacts of the level switch electronic unit. The torque test mechanism is equipped with a spindle clamping mechanism. The spindle clamping mechanism is pushed to the position below the spindle by the tester cylinder, and then the hexagonal clamping above the blade assembly on the spindle is tested. After the torque test is completed, the cylinder retracts, and the industrial computer reads the torque value and records and saves it, and the test is completed. A third probe cylinder (19) is provided on the transmitting end bracket (16), and a third probe (18) is provided at the telescopic end of the third probe cylinder (19); A second probe cylinder (9) is provided on the receiving end bracket (11), and a second probe (10) is provided at the telescopic end of the second probe cylinder (9).

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