Sealing gasket performance test control system

Abstract

The utility model relates to the technical field of sealing gasket testing, in particular to a sealing gasket performance test control system, which comprises a control module, a sensor module, an actuating mechanism and an auxiliary component, and is characterized in that the control module is respectively connected with the sensor module, the actuating mechanism and the auxiliary component; the actuating mechanism provides a mounting site of the sensor module, the auxiliary component is mounted on an internal circuit of the actuating mechanism, the control module comprises a PLC (Programmable Logic Controller), the actuating mechanism comprises a loading oil cylinder and a gas conveying unit, the loading oil cylinder is used for loading and unloading a gasket under the control of the PLC, and the gas conveying unit is used for conveying gas to the loading oil cylinder. According to the utility model, the test platform is surrounded by the low-temperature box, the low-temperature box is connected with the liquid nitrogen source and is provided with the liquid nitrogen filling port, so that convenience is provided for simulating special test environments such as ultralow temperature and the like, and the performance test requirements of LNG storage and transportation related sealing gaskets under an extreme low-temperature condition are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to sealing gasket test technical field especially is related to a sealing gasket performance test control system. BACKGROUND

[0002] Sealing gaskets play a crucial role in numerous industrial fields, such as petroleum chemical industry, mechanical manufacturing, aerospace, etc. They are widely used to connect different components to prevent leakage of fluids or gases, ensuring the normal operation of equipment, system safety and reliability. Therefore, accurate assessment of sealing gasket performance is crucial for product quality control and long-term stable operation of equipment. In traditional sealing gasket performance test, manual operation test equipment is often used, and test personnel need to operate and record data on site. This method is not only inefficient, but also difficult to ensure the accuracy and consistency of test data due to human factors.

[0003] In addition, the control logic of traditional test equipment is usually simple, and cannot realize flexible switching and precise control of multiple test modes. When performing compression rebound test, only limited loading control mode can be provided, which is difficult to meet the demand of sealing gasket performance test under complex working conditions. For different loading modes (such as load control, deformation control, linear pressure control, etc.), it is difficult to realize accurate conversion and accurate test process control, and the performance of sealing gasket under different working conditions cannot be accurately reflected. At present, a sealing gasket performance test control system is needed. SUMMARY

[0004] In order to solve the problems of low operation efficiency and low experimental accuracy in traditional sealing gasket test equipment, the utility model provides a sealing gasket performance test control system.

[0005] In the first aspect, the utility model provides a sealing gasket performance test control system, which adopts the following technical scheme:

[0006] A sealing gasket performance test control system, comprising:

[0007] A control module, a sensor module, an actuator and an auxiliary component, the control module is connected with the sensor module, the actuator and the auxiliary component respectively, the actuator provides the installation site of the sensor module, and the auxiliary component is installed to the internal circuit of the actuator and is used for controlling the on-off and electrical connection of the circuit;

[0008] The control module comprises a PLC controller, the executing mechanism comprises a loading oil cylinder and a gas delivery unit, the loading oil cylinder is used for loading and unloading operation on the gasket under the control of the PLC controller, and the gas delivery unit is used for feeding different gases into the gasket for sealing performance test according to the set parameters under the control of the PLC controller.

[0009] Further, the executing mechanism comprises a test platform and a low-temperature box, the low-temperature box surrounds the outside of the test platform, the low-temperature box is connected with a liquid nitrogen source and is provided with a liquid nitrogen filling inlet on the outside of the low-temperature box, and the test temperature is controlled.

[0010] Further, the test platform comprises an upper platform and a lower platform, and is used for placing the sealing gasket and bearing the pressure applied by the hydraulic cylinder.

[0011] Further, the loading oil cylinder is fixed to the lower platform of the test platform, a piston rod of the loading oil cylinder is connected with the upper platform, hydraulic oil is provided through an oil source and a controller of the loading oil cylinder, and the loading and unloading operation on the gasket is realized.

[0012] Further, the sensor module comprises a grating ruler and a pressure sensor, the grating ruler and the pressure sensor are connected with an analog input end of the PLC controller through shielded cables, and a power supply end of the PLC controller provides working power for the pressure sensor and the grating ruler.

[0013] Further, the grating ruler is fixed to one side of the test platform close to the upper platform through a mounting bracket, a lead rod of the grating ruler is connected with a measuring point on the test platform, and the compression amount, rebound amount and deformation parameters of the gasket are measured.

[0014] Further, the pressure sensor comprises a hydraulic pressure sensor and a differential pressure sensor, the differential pressure sensor is installed in the gas delivery pipelines on both sides of the sealing element, and is used for measuring the pressure difference on both sides of the sealing element, and the hydraulic pressure sensor is installed in a hydraulic oil circuit of the loading oil cylinder through screw threads.

[0015] Further, the gas delivery unit comprises a gas storage tank, a gas flow control valve and a gas delivery pipeline, one end of the gas delivery pipeline is connected with the gas storage tank, the gas flow control valve and the pressure sensor are connected in sequence in the middle of the gas delivery pipeline, and the other end of the gas delivery pipeline is connected with a test cavity in the low-temperature box.

[0016] Further, the auxiliary components comprise a relay and a contactor, a control coil of an electromagnetic valve of the loading oil cylinder is connected with an output port of the PLC controller through the relay and the contactor.

[0017] Further, the PLC controller is internally provided with an Ethernet communication interface, the PLC controller is connected to the upper computer through an Ethernet line, and is used for realizing real-time data transmission and remote control instruction issuing.

[0018] To sum up, the utility model has the beneficial technical effect as follows:

[0019] 1, the utility model discloses control module, sensor module, actuating mechanism and auxiliary component organic integration, the PLC controller of control module as core, unified connection and harmonize other each partial work, realize the integral automation operation of system, greatly improve the integration level and stability of test system, ensure that the test process is carried out efficiently and reliably, reduce the fault risk that each component alone can appear.

[0020] 2, the utility model discloses through the low temperature box surrounding test platform, connects liquid nitrogen source and is equipped with liquid nitrogen filling inlet, can fast, accurately control test temperature, provides the convenience for simulating super low temperature etc. Special test environment meets the performance test demand of LNG storage and transportation related sealing gasket under the condition of extreme low temperature, widens the application range of test system, helps to develop the sealing gasket product that is more suitable for special working condition.

[0021] 3, the grating ruler of the utility model is fixed in the test platform near the upper platform side through the mounting bracket, and the extension rod thereof is connected with the measuring point, so that the compression amount, rebound amount and other deformation parameters of the gasket can be accurately measured, the resolution reaches the high-precision standard, accurate data for compression and rebound performance test are provided, the hydraulic pressure sensor is installed in the hydraulic oil circuit of the loading oil cylinder, and the differential pressure sensor is installed in the gas conveying pipeline on both sides of the sealing element, so that the test medium pressure and the pressure difference on both sides of the sealing element can be accurately measured respectively, the evaluation on the performance of the gasket is ensured to be accurate and reliable, and the reliability of the test result is improved.

[0022] 4, the relay and the contactor in the auxiliary component of the utility model are connected through the control loading oil cylinder solenoid valve control coil and the output port of the PLC controller, reliable control of the action of the loading oil cylinder is realized, the circuit plays the role of switch and protection, prevents the damage of abnormal conditions such as circuit overload and short circuit to the equipment, ensures the safety and stability of system operation, and prolongs the service life of the equipment.

[0023] 5, the PLC controller in the utility model is internally provided with an Ethernet communication interface, and the upper computer is connected through an Ethernet line, so that real-time data transmission and remote control instruction issuing are realized, and the operator can complete test parameter setting, real-time viewing of test data and progress in the remote control room through the upper computer, which not only improves the convenience and safety of operation, but also facilitates timely adjustment and optimization of the test process, and improves the test efficiency and management level. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 This is a schematic diagram of the control connection of a gasket performance testing and control system according to an embodiment of the present invention.

[0025] Figure 2 This is a schematic diagram of the actuator structure of a gasket performance testing and control system according to an embodiment of the present invention.

[0026] Figure 3 This is a schematic diagram of the upper part of the actuator in a gasket performance test control system according to an embodiment of the present invention.

[0027] Figure 4 This is a schematic diagram of the experimental platform of a gasket performance testing and control system according to an embodiment of the present invention.

[0028] Figure 5 This is a schematic diagram of the operation flow of a gasket performance testing and control system according to an embodiment of the present invention.

[0029] Among them, 1. Grating ruler; 101. Extension rod; 2. Upper pressure plate; 3. Cryogenic chamber; 4. Liquid nitrogen inlet; 5. Gasket; 6. Lower pressure plate; 7. Loading cylinder; 8. Upper platform; 9. Oil source; 10. Liquid nitrogen source; 11. Lower platform. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to the accompanying drawings.

[0031] Example 1

[0032] Reference Figure 1 This embodiment of a gasket performance testing and control system includes:

[0033] The system includes a control module, a sensor module, an actuator, and auxiliary components. The control module is connected to the sensor module, the actuator, and the auxiliary components. The actuator provides mounting points for the sensor module. The auxiliary components are installed into the internal wiring of the actuator and are used to control the on / off state and electrical connections of the circuit.

[0034] The control module includes a PLC controller, and the actuator includes a loading cylinder and a gas delivery unit. The loading cylinder is used to load and unload the gasket under the control of the PLC controller, and the gas delivery unit is used to introduce different gases into the gasket according to set parameters for sealing performance testing under the control of the PLC controller.

[0035] Specifically,

[0036] like Figure 1 , Figure 5As shown, the operator starts the control software of the gasket performance test control system on the host computer, sets the test type (such as compression and rebound test, sealing performance test, etc.) and test parameters (including test temperature, loading mode, gas type, pressure, flow, cycle number, etc.) in the human-computer interaction interface, and the setting information is transmitted to the PLC controller through the Ethernet line.

[0037] After receiving the parameters, the PLC controller starts the control program of the low-temperature box 3, controls the liquid nitrogen source 10 to fill liquid nitrogen into the low-temperature box 3, and the liquid nitrogen filling inlet 4 is located on the outside of the low-temperature box and connected with the liquid nitrogen source through a low-temperature pipeline. The connection part uses a metal winding gasket for sealing. This sealing method can provide reliable sealing performance in a low-temperature environment and effectively prevent liquid nitrogen leakage. The pipeline and the liquid nitrogen filling inlet are connected by flanges, metal winding gaskets are installed between the flanges, and multiple bolts are used for tight fixation to ensure firm connection and good sealing. A valve is also installed on the connecting pipeline for controlling the flow of liquid nitrogen. The valve is a low-temperature stop valve made of low-temperature resistant stainless steel, which can work normally in a low-temperature environment and accurately control the filling amount of liquid nitrogen. The temperature change is monitored in real time through the temperature sensor in the low-temperature box 3 until the test temperature is adjusted to the set value and remains stable. If the compression and rebound performance test is selected in the load control mode, the PLC controller sends control signals to the relays and contactors according to the set loading speed and target load value, starts the oil pump motor and adjusts its operating frequency. The oil pump motor drives the oil pump to deliver hydraulic oil to the loading oil cylinder 7 through the oil source 9 and the controller, which pushes the piston rod to move the upper platform 8 upward and applies pressure to the gasket 5 placed between the upper and lower platforms 11.

[0038] As shown in Figure 2 When the test starts, the PLC controller controls the oil pump motor to start according to different test modes (such as load control, deformation control, linear pressure control, etc.), and the oil pump delivers hydraulic oil to the loading oil cylinder. The hydraulic oil pushes the piston rod to extend, driving the upper pressure plate 2 connected to the piston rod to move downward. As the upper pressure plate 2 gradually approaches the lower pressure plate, the gasket is gradually compressed. In this process, the distance between the upper pressure plate 2 and the lower pressure plate 6 continuously decreases, and the pressure applied to the gasket gradually increases. For example, in the load control mode, the PLC accurately controls the operating frequency of the oil pump motor according to the set loading speed and target load value, thereby controlling the speed of the upper pressure plate moving downward and the size of the pressure applied. The upper pressure plate is directly connected to the piston rod of the loading oil cylinder, and the movement of the piston rod is directly transmitted to the upper pressure plate, which is the power source for the upper pressure plate to apply pressure to the gasket and unload it. Although the lower pressure plate is not directly connected to the loading oil cylinder, the pressure generated by the loading oil cylinder indirectly acts on the lower pressure plate through the upper pressure plate, and the lower pressure plate 6 serves to support the gasket and bear the reaction force.

[0039] As shown inFigure 3 、 Figure 4 As shown in FIG. 1, the displacement change of the upper platen 2 and the lower platen 6 is measured by a displacement sensor (grating ruler) installed on the test platform, the extension rod of the grating ruler is connected with the upper platen 2 or a component moving synchronously with the upper platen 2, when the lower platen is fixed and the upper platen 2 moves with the piston rod, the grating ruler 1 can monitor the displacement of the upper platen in real time, and obtain the compression amount and rebound amount of the gasket and other data. At the same time, a hydraulic pressure sensor is installed in the hydraulic oil circuit of the loading cylinder to measure the pressure of the hydraulic oil, which is related to the pressure applied by the upper platen 2 on the gasket, and the pressure of the hydraulic oil can be measured indirectly to know the pressure applied by the upper platen 2 on the gasket, which provides a basis for test data collection and control.

[0040] During the pressure application process, the hydraulic pressure sensor monitors the hydraulic oil pressure in real time, and transmits the pressure data to the PLC controller through a shielded cable, and the grating ruler 1 monitors the displacement of the upper platform 8 in real time, wherein the grating ruler 1 is fixed to the test platform near one side of the upper platform through a mounting bracket, the extension rod 101 of the grating ruler 1 is connected with the measurement point on the test platform, for measuring the compression amount, rebound amount and deformation parameters of the gasket, when the displacement of the upper platform 8 reaches the set compression amount, the PLC controller controls the relay and contactor to cut off the power supply of the oil pump motor, stops loading, and records the pressure data at this time.

[0041] In the deformation amount control mode, the PLC controller controls the action of the electromagnetic valve of the loading cylinder 7 according to the set compression amount and displacement change rate, accurately adjusts the flow and flow direction of the hydraulic oil, and then controls the displacement of the piston rod driving the upper platform 8, the grating ruler 1 continuously feeds back the measured displacement data of the upper platform 8 to the PLC controller, when the target compression amount is reached, the PLC controller controls the loading cylinder 7 to remain stable, and at the same time collects the data of the hydraulic pressure sensor to obtain the pressure value at this time.

[0042] For the linear pressure control mode, the PLC controller calculates the required loading force according to the input gasket 5 size and the set linear pressure value, and then controls the oil pump motor and the loading cylinder 7 to perform loading operation in a similar manner as the load control mode, during the loading process, the pressure and displacement data are monitored in real time, and the running state of the oil pump motor is continuously adjusted to ensure that the actual linear pressure meets the test requirements. When performing gas sealing test, the PLC controller controls the valve of the corresponding gas storage tank to open according to the set gas type, and sends a control signal to the gas flow control valve to adjust the valve opening degree, so that the gas enters the test cavity through the gas delivery pipeline according to the set pressure and flow.

[0043] During the process of gas input, the pressure sensor on the gas delivery pipeline monitors the gas pressure in the test chamber in real time and feeds back the data to the PLC controller, and when the pressure reaches the set value, the PLC controller controls the gas flow control valve to maintain a stable opening degree to maintain the test pressure constant. The differential pressure sensor continuously monitors the pressure difference on both sides of the sealing element, and if the pressure difference exceeds the leakage test accuracy range, the PLC controller triggers an alarm signal and records the leakage data.

[0044] During the entire test process, the PLC controller continuously collects the data of the pressure sensors (hydraulic pressure sensor and differential pressure sensor) and displacement sensor (grating ruler 1) at preset time intervals, and stores these data in the internal memory. According to the test type and the collected data, the PLC controller calculates the compression rate, rebound rate, permanent deformation amount and other parameters of the gasket 5 according to the corresponding calculation formula. The processed data is uploaded to the upper computer in real time through the Ethernet line, displayed in the human-computer interaction interface of the upper computer, and stored in the database of the upper computer for subsequent analysis.

[0045] When the test is completed, the PLC controller controls the relay and contactor to cut off the power supply of the oil pump motor, so that the loading oil cylinder 7 is unloaded and the piston rod retreats to the initial position. At the same time, the gas flow control valve is controlled to be closed, and the gas input is stopped. Then, the PLC controller starts the temperature rising program of the low temperature box 3 and controls the low temperature box 3 to rise to room temperature.

[0046] After the equipment components return to normal temperature, the operator can view the test report in the human-computer interaction interface of the upper computer and further analyze the test data, such as generating test curves, comparing data under different test conditions, etc., so as to evaluate the performance of the sealing gasket 5.

[0047] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A gasket performance test control system, comprising: The utility model relates to a kind of test system of sealing gasket, including: control module, sensor module, actuator and auxiliary components, the control module is connected sensor module, actuator and auxiliary components respectively, the actuator provides the installation site of sensor module, the auxiliary components are installed to the internal circuit of actuator, for the on-off of control circuit and electrical connection;The control module includes PLC controller, the actuator includes loading cylinder and gas delivery unit, the loading cylinder is used to load and unload operation to gasket under the control of PLC controller, the gas delivery unit is used to different gas is according to the parameter of setting and is passed into gasket to carry out sealing performance test under the control of PLC controller. The actuator includes test platform and cryogenic tank, the cryogenic tank is surrounded to realize platform outside, the cryogenic tank is connected liquid nitrogen source and is provided with liquid nitrogen filling inlet outside the cryogenic tank, for the control of test temperature. The test platform includes upper platform and lower platform, for placing sealing gasket and bearing the pressure exerted by hydraulic cylinder.

2. The system for controlling performance testing of a gasket according to claim 1, wherein The loading cylinder is fixed to the lower platform of experimental platform, the piston rod of the loading cylinder is connected with the upper platform, and the hydraulic oil is provided by the oil source and controller of the loading cylinder for the pressure exerting and unloading operation of gasket.

3. The system for controlling a performance test of a gasket according to claim 2, wherein The sensor module includes grating ruler and pressure sensor, the grating ruler and pressure sensor are connected to the analog input end of PLC controller by shielded cable, and the power supply end of the PLC controller provides working power supply for the pressure sensor and grating ruler.

4. The system for controlling a performance test of a gasket according to claim 3, wherein The grating ruler is fixed to the test platform near the upper platform side by mounting bracket, and the extension rod of the grating ruler is connected with the measuring point on the test platform for measuring the compression amount, rebound amount and deformation parameters of gasket.

5. The system for testing the performance of a gasket according to claim 1, wherein The pressure sensor includes hydraulic pressure sensor and differential pressure sensor, the differential pressure sensor is installed in the gas delivery pipeline on both sides of sealing element for measuring the pressure difference on both sides of sealing element, and the hydraulic pressure sensor is installed in the hydraulic oil circuit of loading cylinder by screw thread.

6. The system for controlling a performance test of a gasket according to claim 5, wherein The gas delivery unit includes gas storage tank, gas flow control valve and gas delivery pipeline, one end of the gas delivery pipeline is connected with the gas storage tank, the gas flow control valve and pressure sensor are connected in series in the middle of the gas delivery pipeline, and the other end of the gas delivery pipeline is connected with the test cavity in the cryogenic tank.

7. The system for controlling a performance test of a gasket according to claim 5, wherein The auxiliary components include relay and contactor, the electromagnetic valve control coil of the loading cylinder is connected with the output port of PLC controller through relay and contactor.

8. The system for testing the performance of a gasket according to claim 1, wherein The PLC controller is provided with Ethernet communication interface, and the PLC controller is connected to host computer through Ethernet cable for realizing real-time data transmission and remote control instruction issuing.

9. The system for controlling a performance test of a gasket according to claim 8, wherein ​ 10. The system for controlling a performance test of a gasket according to claim 9, wherein ​

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