Cylinder testing device using rodless cylinder equivalent load

Abstract

The utility model provides an air cylinder testing device using rodless air cylinder equivalent load, and particularly relates to the rodless air cylinder testing field, comprising a test bench, and a load air cylinder and a tested air cylinder arranged on the test bench; the sliding plate of the load cylinder is connected with the sliding plate of the tested cylinder through a connecting piece. The connecting piece is provided with a force sensing device; the control module is used for controlling and adjusting the load cylinder and the tested cylinder, the signal acquisition module is used for transmitting test data, and the display screen is used for displaying; according to the utility model, the rodless cylinder is used for applying resistance to simulate the load of the cylinder to be tested, the size of the simulated load is controlled by adjusting the throttle valve of the load cylinder, and the accurate resistance is measured by the force sensor, so that the accuracy and consistency of the test are ensured.

Description

Technical Field

[0001] This utility model belongs to the field of rodless cylinder testing, specifically relating to a cylinder testing device using an equivalent load of a rodless cylinder. Background Technology

[0002] Currently, electro-pneumatic sliding doors are the mainstream door unit in railway passenger cars. Rodless cylinders are a crucial component for driving these doors, and their leakage, resistance, and load-bearing capacity are key parameters for ensuring their proper functioning. Current testing methods for rodless cylinders typically only measure leakage and no-load resistance; traditional testing methods cannot meet diverse testing needs.

[0003] The patent with application number CN202121536167.1 discloses a technology related to the testing of rodless cylinders. This technology can quickly install a magnetic coupler rodless cylinder onto a testing device, test the working status of the magnetic coupler rodless cylinder through electrical control components, realize the rapid detection of key performance indicators of the magnetic coupler rodless cylinder, and quickly determine the quality of the magnetic coupler rodless cylinder. However, its testing content is limited and it still cannot meet the diversified testing needs.

[0004] To address the above shortcomings, a cylinder testing device using an equivalent load of a rodless cylinder is needed, which can perform pressure holding tests, resistance tests, and load tests on rodless cylinders, thus achieving diversified testing. Utility Model Content

[0005] The purpose of this invention is to provide a cylinder testing device that uses an equivalent load of a rodless cylinder, which can perform pressure holding tests, resistance tests, and load tests on rodless cylinders, thus achieving diversified testing.

[0006] This utility model provides the following technical solution:

[0007] A cylinder testing device using a rodless cylinder equivalent load includes a test bench, and a load cylinder and a cylinder under test disposed on the test bench.

[0008] The sliding plate of the load cylinder is connected to the sliding plate of the cylinder under test via a connector; and the connector is equipped with a force sensing device.

[0009] It also includes a control module for controlling the load cylinder and the cylinder under test, a signal acquisition module for transmitting test data, and a display screen for displaying the data.

[0010] Preferably, the test bench is provided with a pair of vertical columns and a support beam; the lower end of the columns is connected to the test bench, and the two ends of the support beam are connected to the sides of the columns respectively.

[0011] The cylinder under test is mounted on the support beam; both ends of the load cylinder are connected to the side of the column.

[0012] Furthermore, the plane containing the sliding plate of the load cylinder and the sliding plate of the cylinder under test are perpendicular to each other.

[0013] Preferably, the connecting parts include a test cylinder connecting part with a convex cross-section and a load cylinder connecting part;

[0014] The lower end of the cylinder connector under test is connected to the sliding plate of the cylinder under test; force sensors are provided on both sides of the cylinder connector under test.

[0015] One end of the load cylinder connector is connected to the sliding plate of the load cylinder, and the other end of the load cylinder connector is clamped on both sides of the force sensor.

[0016] Preferably, the support beam is provided with a pair of fixing plates with right-angled cross-sections, and the fixing plates are provided with strip holes. The fixing plates are threadedly connected to the support beam through the strip holes; the cylinder under test is clamped and fixed between the two fixing plates.

[0017] Preferably, it also includes several triangular support frames; the lower sides of both ends of the load cylinder are connected to the column through the triangular support frames;

[0018] Preferably, the lower sides of both ends of the support beam are connected to the column via triangular support frames; the lower end of the column is connected to the test bench via triangular support frames.

[0019] Preferably, the load cylinder is equipped with proximity switches at both ends for sensing the stroke; both the load cylinder and the cylinder under test are equipped with quick exhaust valves.

[0020] The beneficial effects of this utility model are:

[0021] This invention uses a rodless cylinder to apply resistance to simulate the load on the cylinder under test. The magnitude of the simulated load is controlled by adjusting the throttle valve of the load cylinder, and the precise resistance is measured by a force sensor to ensure the accuracy and consistency of the test. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0023] Figure 1 This is the front view of the device;

[0024] Figure 2 This is an axial view of the device;

[0025] Figure 3 Here is a structural diagram of the connector;

[0026] Figure 4 A schematic diagram of an embodiment of the air circuit unit required for the equivalent load of a rodless cylinder;

[0027] Figure 5 This is a schematic diagram of an embodiment of the circuit unit required for the equivalent load of a rodless cylinder.

[0028] The attached diagram is labeled as follows: 1. Connector; 1a. Load cylinder connector; 1b. Test cylinder connector; 2. Quick exhaust valve; 3. Load cylinder; 4. Test cylinder; 5. Display screen; 6. MCU; 7. Optocoupler module; 8. Relay module; 9. Terminal block; 10. 220V to 24V power supply; 11. 24V to 5V power supply; 12. Four-channel transmitter; 13. Air switch; 14. Power strip; 15. Solenoid valve; 16. Pressure transmitter with display; 17. Computer host; 18. Column; 19. Fixing plate; 20. Triangular support frame; 21. Force sensor; 22. Test bench; 23. Support beam. Detailed Implementation

[0029] This technical solution aims to provide the physical architecture of the testing device. Since the circuit and electronic control are abstract and cannot be visualized, and can be easily implemented by those skilled in the art based on existing technology, the specific principles of the circuit and electronic control will not be elaborated here. A cylinder testing device using a rodless cylinder equivalent load includes a test bench 22, and a load cylinder 3 and a test cylinder 4 disposed on the test bench 22.

[0030] The sliding plate of the load cylinder 3 is connected to the sliding plate of the test cylinder 4 through the connector 1; and the connector 1 is provided with a force sensing device 21 for sensing the load force; in order to facilitate the fixed connection, the connector 1 includes a test cylinder connector 1b with a convex cross-section and a load cylinder connector 1a.

[0031] The lower end of the cylinder connector 1b under test is threadedly connected to the sliding plate of the cylinder under test 4 for easy disassembly and assembly; force sensors 21 are respectively provided on both sides of the cylinder connector 1b under test to sense the resistance of the reciprocating translation of the cylinder under test 4; one end of the load cylinder connector 1a is threadedly connected to the sliding plate of the load cylinder 3 for easy disassembly and assembly; the other end of the load cylinder connector 1a is clamped on both sides of the force sensor 21. For details, please refer to the appendix. Figure 3 ;

[0032] To facilitate fixed connection, the test bench 22 is provided with a pair of vertical columns 18 and a support beam 23; the lower end of the column 18 is connected to the test bench 22, and the two ends of the support beam 23 are respectively connected to the side of the column 18; the cylinder under test 4 is set on the support beam 23; the two ends of the load cylinder 3 are connected to the side of the column 18; and the plane where the sliding plate of the load cylinder 3 and the sliding plate of the cylinder under test 4 are located are perpendicular to each other, so as to ensure that the load cylinder 3 and the cylinder under test 4 can be easily connected through the connector 1.

[0033] For easy assembly and disassembly, the support beam 23 is equipped with a pair of right-angled fixing plates 19. The fixing plates 19 have slotted holes and are threaded to the support beam 23 through these holes. The distance between the two fixing plates 19 can be changed by altering the position of the bolts in the slotted holes. The tested cylinder 4 is clamped and fixed between the two fixing plates 19. The lower ends of the load cylinder 3 are connected to the column 18 via triangular support frames 20. The lower ends of the support beam 23 are also connected to the column 18 via triangular support frames 20. The lower side of the column 18 is connected to the test bench 22 via triangular support frames 20. The load cylinder 3 has proximity switches at both ends for sensing the stroke, ensuring the stroke test is completed. Both the load cylinder 3 and the tested cylinder 4 are equipped with quick-release valves 2. For ease of control, the system also includes a control module for controlling and adjusting the load cylinder 3 and the tested cylinder 4, a signal acquisition module for transmitting test data, and a display screen 5 for display.

[0034] The lower part of the test bench houses the circuitry and electronic control modules, including an MCU6, an optocoupler module7, a relay module8, a terminal block9, a 220V to 24V power supply10, a 24V to 5V power supply11, a four-channel transmitter12, an air switch13, a power strip14, a solenoid valve15, a pressure transmitter with display16, and a computer host17. Through the synergistic action of these components, the test cylinder's load is simulated by applying resistance using a rodless cylinder. The simulated load is controlled by adjusting the throttle valve of the load cylinder, and the precise resistance is measured using a force sensor, ensuring the accuracy and consistency of the test. To improve testing efficiency, two testing channels can be configured, allowing for the simultaneous testing of multiple rodless cylinders.

[0035] Based on the specific embodiments, in order to enable those skilled in the art to more clearly understand this device, the working process of this device is explained as follows:

[0036] like Figures 4 to 5The circuit unit includes a main control chip (MCU), an optocoupler module for level signal input, a signal output relay module, a pressure transmitter, a force sensor, and a host computer for running and controlling the upper control computer. The pneumatic circuit unit consists of several solenoid valves, throttle valves, and pressure transmitters. The left air inlet of the load cylinder is connected to solenoid valve Q0.0 and solenoid valve Q0.1 via a three-way connector. The outlet of solenoid valve Q0.0 is connected to the throttle valve, and the inlet of solenoid valve Q0.1 is connected to the pressure regulating valve. The right air inlet of the load cylinder is connected to solenoid valve Q0.4 and solenoid valve Q0.5 via a three-way connector. The outlet of solenoid valve Q0.4 is connected to the throttle valve, and the inlet of solenoid valve Q0.5 is connected to the pressure regulating valve. The left quick-release valve of the tested cylinder is connected to solenoid valve Q0.2 and solenoid valve Q0.3 via a three-way connector. The inlet of solenoid valve Q0.2 is connected to the pressure regulating valve, and the outlet of solenoid valve Q0.3 is connected to the pressure transmitter. The quick exhaust valve on the right side of the cylinder under test is connected to the outlet of solenoid valve Q0.6 and the inlet of solenoid valve Q0.7 via a three-way connector. The inlet of solenoid valve Q0.6 is connected to the outlet of the pressure regulating valve, and the outlet of solenoid valve Q0.7 is connected to the pressure transmitter.

[0037] The input air pressure is regulated by a precision pressure regulating valve. By adjusting the air intake of the pressure regulating valve, the thrust of the cylinder under test can be controlled. The function of the pressure transmitter is to monitor the air pressure of the cylinder under test in real time. By switching between solenoid valves Q0.3 and Q0.7, a single pressure transmitter can monitor the air pressure at both ends of the cylinder under test.

[0038] A proximity switch I0.0 is installed in the upper left slot of the load cylinder, and a proximity switch I0.4 is installed in the upper right slot. The slider of the load cylinder is connected to a magnetic ring inside the cylinder. When the slider moves to the leftmost side of the load cylinder, the magnetic ring inside the cylinder triggers proximity switch I0.0; when the slider moves to the rightmost side of the load cylinder, the magnetic ring inside the cylinder triggers proximity switch I0.4. By detecting the state of the proximity switches, the position information of the tested cylinder and the load cylinder slider during the test can be determined. A fixed bracket is installed on the load cylinder slider, and force sensors L1 and R1 are respectively installed on both sides of the fixed bracket. A stop is installed on the tested cylinder slider, located between force sensors L1 and R1. The real-time thrust of the cylinder can be measured using the aforementioned force sensors.

[0039] The load resistance simulated by the load cylinder can be adjusted by controlling the on / off state of the solenoid valves and monitoring the value of the force sensor. When solenoid valves Q0.0, Q0.2, Q0.3, and Q0.4 in the pneumatic circuit unit are opened, the slide block of the tested cylinder begins to move from left to right. The stop block installed on the tested cylinder slide block passes through the fixed bracket installed on the load cylinder slide block, and the force sensor R1 measures the resistance from left to right of the load at this time. The throttle valve of solenoid valve Q0.4 on the right side of the load cylinder controls the air output of the load cylinder to adjust the resistance from left to right of the load cylinder. The resistance is precisely adjusted based on the value fed back from the force sensor R1. This process continues... When solenoid valves Q0.0, Q0.6, Q0.7, and Q0.4 in the pneumatic circuit unit are opened, the slider of the tested cylinder begins to move from right to left. The stop block installed on the slider of the tested cylinder passes through the fixed bracket installed on the slider of the load cylinder, and the force sensor R1 measures the resistance of the load cylinder from right to left. At this time, the throttle valve of the solenoid valve Q0.4 on the right side of the load cylinder controls the amount of air output of the load cylinder to adjust the resistance of the load cylinder from right to left, and the resistance of the load cylinder from right to left is precisely adjusted by the value fed back by the force sensor R1.

[0040] After the load test begins, solenoid valves Q0.0, Q0.2, Q0.3, and Q0.4 in the pneumatic circuit unit are opened. If the load-bearing capacity of the cylinder under test is normal, the cylinder under test will push the load cylinder from left to right. When the magnetic ring inside the load cylinder reaches the proximity switch I0.4 installed on the right side of the rodless cylinder, the left-to-right load test of the cylinder under test is completed, and all solenoid valves are closed. Next, the right-to-left load test of the cylinder under test begins. Solenoid valves Q0.0, Q0.6, Q0.7, and Q0.4 in the pneumatic circuit unit are opened. If the load-bearing capacity of the cylinder under test is normal, the cylinder under test will push the load cylinder from right to left. When the magnetic ring inside the load cylinder reaches the proximity switch I0.0 installed on the left side of the rodless cylinder, the right-to-left load test of the cylinder under test is completed, and all solenoid valves are closed, completing one round of load testing.

[0041] The pneumatic circuit unit also includes a rodless cylinder pressure holding test function. After the pressure holding test begins, pneumatic circuit units Q0.0, Q0.4, Q0.2, and Q0.3 are open, while the remaining solenoid valves are closed. The slider of the cylinder under test pushes the slider of the load cylinder from left to right. When proximity switch I0.4 detects the magnetic ring of the load cylinder, this state is maintained for 10 seconds to ensure sufficient air pressure in the cylinder under test. After this, solenoid valve Q0.3 remains open, while the remaining solenoid valves are closed, and the formal test begins. After the test time has elapsed, the leakage on the left side of the cylinder under test is verified by comparing the pressure transmitter values ​​at the start and end of the test. This process is repeated to test the leakage on the right side of the cylinder under test.

[0042] The pneumatic circuit unit also includes a rodless cylinder no-load resistance test function. After the no-load resistance test begins, pneumatic circuit units Q0.1 and Q0.4 open, while the remaining solenoid valves close. The load cylinder slider pushes the test cylinder slider from left to right. By adjusting the throttle valve on the right side of the load cylinder, the load cylinder can be controlled to drive the test cylinder at a uniform speed. At this time, the no-load resistance of the test cylinder can be obtained by observing the value of the force sensor R1. This process can be repeated to complete the test of the no-load resistance on the right side of the test cylinder. The load test method allows setting the number of test cycles via a host computer.

[0043] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cylinder testing device using a rodless cylinder equivalent load, characterized by: The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The sliding plate of the load cylinder and the sliding plate of the measured cylinder are connected by the connecting piece, and the connecting piece is provided with a force sensing device; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; 2. A cylinder testing device using equivalent load of rodless cylinder according to claim 1, characterized in that: The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; 3. A cylinder testing device using equivalent load of rodless cylinder according to claim 2, characterized in that: The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; 4. A cylinder testing device using equivalent load of rodless cylinder according to claim 3, characterized in that: The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; 6. A cylinder testing device using equivalent load of rodless cylinder according to claim 5, characterized in that: The test bench, the load cylinder and the measured cylinder are arranged on the test bench; 7. A cylinder test device using equivalent load of rodless cylinder according to claim 6, characterized in that: The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench, the load cylinder and the measured cylinder are arranged on the test bench; The test bench,

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