Solenoid valve performance detection platform

Abstract

The invention discloses a solenoid valve performance detection platform, which belongs to the technical field of solenoid valve test platforms, and comprises a test cabinet and an operation table, a hydraulic system and a test base are arranged in the test cabinet, an auxiliary door is arranged at the side part of the test cabinet, a pressure gauge, an emergency stop button, a buzzer and a cabinet are arranged on the operation table, and a three-color indicating lamp is arranged at the top of the cabinet. An electrical control judgment system and a direct-current stabilized power supply are arranged in the cabinet, an industrial control display screen and a keyboard which are connected with the electrical control judgment system are arranged at the side part of the cabinet, and a Foma wheel is arranged at the bottom of the operation cabinet. According to the device, after the tested valve is fixed through the test base, various performances of the tested valve are detected through the hydraulic system, after the test is completed, the industrial personal computer on the operation table processes and analyzes various test data so as to detect the performances of the electromagnetic valves of different models and specifications, and whether the electromagnetic valves are qualified or not is autonomously judged through software; and various problems encountered during electromagnetic valve management are solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of electromagnetic valve test platform, and particularly relates to an electromagnetic valve performance detection platform. BACKGROUND

[0002] The electromagnetic valve is an industrial equipment controlled by electromagnetism, is an automatic basic element for controlling fluid, is used in a hydraulic system, and is extremely important in stability and sealing performance, and is relatively strict in requirements for reversing performance, action performance and sealing, and needs to detect the insulation performance, insulation resistance of a coil, action test and sealing performance of the electromagnetic valve after production. The detection of the electromagnetic valve needs a detection device. In recent years, the accidents of unit defects caused by electromagnetic valve faults of a hydropower station increase, the defects mainly occur in the stage of switching from phase modulation and air compression to water pumping, the fault electromagnetic valves involve control systems such as phase modulation and air compression, main water inlet valves and speed governors, the main cause of the electromagnetic valve faults is valve core sticking, and the main reflected management problem is that maintenance is not in place.

[0003] However, the existing electromagnetic valve detection platform is single in function and is difficult to adapt to various types of electromagnetic valves, and various detection devices cannot be integrated. In the detection process, the safety is insufficient, and it is difficult to protect the operator during the detection process, therefore, it is necessary to provide a new electromagnetic valve detection platform to solve the above technical problems. SUMMARY

[0004] The technical problem to be solved by the application is to solve the deficiencies in the prior art, and to design an electromagnetic valve performance detection platform. The electromagnetic valve performance detection platform is simple in structure and specifically comprises a test cabinet and an operation table. A hydraulic system and a test base are arranged in the test cabinet. A pressure gauge, an emergency stop button, a buzzer and a cabinet are arranged on the operation table. After the test valve is fixed by the test base, the performance of the test valve is detected by the hydraulic system. After the test is completed, the industrial computer on the operation table processes and analyzes the test data to detect the performance of electromagnetic valves of different types and specifications. Whether the electromagnetic valve is qualified is judged by LabView software. Finally, an electromagnetic valve performance detection report is formed. The problems encountered in the management of electromagnetic valves are solved, the equipment failure caused by the lack of maintenance of electromagnetic valves is reduced, the management level of electromagnetic valves is effectively improved, and the safety and stability of the operation of power station equipment are further improved.

[0005] The application adopts the following scheme to solve the technical problem:

[0006] An electromagnetic valve performance detection platform,

[0007] characterized in that

[0008] comprises a test cabinet and an operation table,

[0009] the operation table is arranged on the top of the operation cabinet,

[0010] The test cabinet is provided with a test base and a hydraulic system, the hydraulic system is provided with a motor, a gear pump, an oil tank, a filter assembly, a filter, a resistance meter and a cooler,

[0011] The oil tank stores oil, the gear pump is connected with the oil tank, the gear pump is connected with an electric proportional overflow valve, the electric proportional overflow valve is used for loading the gear pump and adjusting the pressure of the hydraulic system,

[0012] The resistance meter is used for detecting the insulation resistance and coil voltage resistance value of the electromagnetic valve according to the instruction of the electrical control judgment system,

[0013] The side of the test cabinet is provided with an auxiliary door for maintenance and pressure test,

[0014] The hydraulic system comprises a main system oil supply pressure building circuit, a bridge loading circuit, a drain flow meter circuit and a drain bypass circuit,

[0015] The main system oil supply pressure building circuit is used for providing a stable and controllable high-pressure oil source for the hydraulic system, adjusting the pressure, oil flow of the hydraulic system and controlling the switching of oil flow direction,

[0016] The bridge loading circuit is used for providing bidirectional loading pressure for the test valve,

[0017] The drain bypass circuit is used for adjusting the pressure during the drain process while ensuring that the hydraulic system drain function is normally implemented,

[0018] The drain flow meter circuit is used for measuring the leakage flow of the test valve,

[0019] The test base is used for fixing the test valve,

[0020] The operation table is provided with a pressure gauge, an emergency stop button, a buzzer and a cabinet,

[0021] The top of the cabinet is provided with a running three-color indicator light,

[0022] The cabinet is provided with an electrical control judgment system and a DC stabilized power supply, and the side of the cabinet is provided with an industrial control display screen and a keyboard connected with the electrical control judgment system,

[0023] The DC stabilized power supply is used for supplying power to the electrical control judgment system,

[0024] The electrical control judgment system is composed of a PLC control system and a computer control system, and the PLC control system and the computer control system keep real-time communication,

[0025] The bottom of the operation cabinet is provided with a Foma wheel.

[0026] As a preferred embodiment of the present application,

[0027] The main system oil supply and pressure building circuit comprises an oil supply pipeline, an oil return circuit and a reversing circuit,

[0028] The oil supply pipeline is used to deliver the oil output by the gear pump to each component of the system,

[0029] The oil return circuit passes through the bridge circuit, and is used to guide the oil after work to flow back to the oil tank,

[0030] The reversing circuit is used to control the flow direction of the oil to realize the switching of different working states,

[0031] The main system oil supply and pressure building circuit is provided with a high-precision flow meter and a high-pressure flow meter,

[0032] The high-precision flow meter is used to measure the oil flow of the circuit where the gear pump is located in the main system oil supply and pressure building circuit,

[0033] The high-pressure flow meter is used to detect the overall oil flow of the main system oil supply and pressure building circuit.

[0034] As a preferred embodiment of the present application,

[0035] The bridge loading circuit comprises a gear pump test circuit and a bridge circuit,

[0036] The gear pump test circuit is used to provide stable oil supply for the test valve, and ensure that the test valve can obtain required working medium during the test,

[0037] The bridge circuit is used to realize the bidirectional loading function,

[0038] The bridge loading circuit is provided with an electromagnetic plug, which is used to receive an electrical signal, realize the reversing of the oil circuit by controlling the flow direction of the oil, and enable the test valve to be tested under different working states.

[0039] As a preferred embodiment of the present application,

[0040] The operation cabinet is provided with a fixed frame, and the test base is arranged in the fixed frame,

[0041] The test base comprises two corresponding first fixed feet welded in the fixed frame, and the first fixed feet are fixed with corresponding second fixed feet through bolts,

[0042] The test base is fixed on the side of the two second fixed feet, and the test base is provided with a connecting pipeline.

[0043] As a preferred embodiment of the present application,

[0044] The operation platform is provided with a rectangular transparent protective cover corresponding to the test base.

[0045] As a preferred embodiment of the present application,

[0046] The maximum working pressure of the hydraulic system is 31.5Mpa,

[0047] The rated working pressure of the hydraulic system is 21MPa,

[0048] The maximum flow of the hydraulic system is 9L / min,

[0049] The volume of the oil tank is 40L.

[0050] As a preferred embodiment of the present application,

[0051] The gear pump adopts a low-noise internal meshing gear pump.

[0052] As a preferred embodiment of the present application,

[0053] The PLC control system takes PLC as the hardware control core to realize the start-stop control and interlock protection function of each motor in the electrical control judgment system, and to control the opening and closing action of the electromagnetic valve in the hydraulic system, and to adjust the electromagnetic valve,

[0054] The PLC control system comprises a PLC host, an input module, an output module and a communication module,

[0055] The PLC host is used for receiving the signal of the input module, processing the signal according to the pre-written program, and sending the processing result to the output module,

[0056] The input module is used for collecting the signal in the electrical control judgment system and converting it into an electrical signal recognizable by the PLC host,

[0057] The output module is used for converting the control signal processed by the PLC host into a driving signal for driving external devices,

[0058] The communication module is used for realizing real-time communication between the PLC control system and the computer control system.

[0059] As a preferred embodiment of the present application,

[0060] The computer control system comprises a LabView test platform, which reads and writes the data and state of the PLC control system in real time, and performs logical judgment to realize point-to-point control,

[0061] The LabView test platform displays a man-machine interface through the industrial display screen,

[0062] The LabView test platform is operated, recorded, monitored, tested, inquired or stored by an operator through the keyboard.

[0063] As a preferred embodiment of the present application,

[0064] The pressure gauges are four, specifically a main system oil supply pressure monitoring gauge, an electric proportional overflow valve rear pressure monitoring gauge, a bridge type loading circuit pressure monitoring gauge and a test valve oil leakage end pressure monitoring gauge,

[0065] The main system oil supply pressure monitoring gauge is installed at the outlet end of the gear pump of the main system oil supply pressure building circuit, for real-time display of the initial pressure output by the gear pump;

[0066] The electric proportional overflow valve rear pressure monitoring gauge is installed at the outlet side of the electric proportional overflow valve of the main system oil supply pressure building circuit, for monitoring the pressure of the hydraulic system after adjustment by the overflow valve;

[0067] The bridge type loading circuit pressure monitoring gauge is installed at the oil inlet end or the test valve loading port of the bridge type loading circuit, for monitoring the actual pressure when the test valve is bidirectionally loaded;

[0068] The test valve oil leakage end pressure monitoring gauge is installed at the test valve oil leakage port of the oil leakage bypass circuit, for monitoring the back pressure during the oil leakage of the test valve.

[0069] Compared with the prior art, the present application has the following beneficial effects:

[0070] 1. For the pain points encountered in the detection and management of electromagnetic valves, an integrated electromagnetic valve performance detection platform highly consistent with the actual field work is innovatively developed. According to the actual field work, the platform adopts integrated design to integrate detection and analysis components into one, realizing full detection of electromagnetic valve performance. In daily maintenance and accident handling of equipment, the platform can rapidly and accurately detect control valves comprehensively, thereby preventing faults and defects, improving work efficiency and ensuring the quality of spare parts. Specifically, the platform includes a test cabinet and an operation table, the operation table is arranged on the top of the operation cabinet, the test cabinet is internally provided with a hydraulic system and a test base, and the operation table is provided with pressure gauges, an emergency stop button, a buzzer and a cabinet.

[0071] The test base fixes the test valve, the hydraulic system includes a main system oil supply pressure building circuit, a bridge loading circuit, a drain flowmeter circuit and a drain bypass circuit, each circuit cooperates with each other, and realizes functions such as pressure control, flow regulation and electromagnetic valve testing of the hydraulic system together, after fixing the test valve through the test base, the performance of the test valve is detected through the hydraulic system, and after the test is completed, the industrial computer on the operation table processes and analyzes the test data.

[0072] The insulation resistance value, coil resistance value, electromagnetic valve action voltage, electromagnetic valve spool action and internal leakage of electromagnetic valves of different models and specifications can be detected, and whether the electromagnetic valve is qualified can be judged by the LabView software, and finally the electromagnetic valve performance detection report is formed. The electromagnetic valve performance detection platform can reduce the equipment failure caused by insufficient electromagnetic valve maintenance, effectively improve the management level of the electromagnetic valve, and further improve the safety and stability of the power station equipment operation.

[0073] 2、The test base is detachable through the bolt connection of the first fixing foot and the second fixing foot, and a plurality of types of control valves can be detected by replacing different test bases, so that the application range is very wide.

[0074] 3、The auxiliary door also reserves a high-pressure interface, according to the actual work on site, the high-pressure hose and the high-pressure ball valve are externally connected, which can be used for equipment pressure, further reducing manpower and improving work efficiency.

[0075] 4、The bottom of the operation cabinet is provided with a Foma wheel to realize flexible movement of the equipment, and ensure that the detection platform is in a horizontal state during the overall test process. DETAILED DESCRIPTION

[0076] Figure 1 A structure diagram of an electromagnetic valve performance detection platform is provided for the present application;

[0077] Figure 2 A structure diagram of an electromagnetic valve performance detection platform is provided for the present application;

[0078] Figure 3 A structure diagram of an electromagnetic valve performance detection platform is provided for the present application;

[0079] Figure 4 A structure diagram of an electromagnetic valve performance detection platform is provided for the present application;

[0080] Figure 5 A structure diagram of an electromagnetic valve performance detection platform is provided for the present application;

[0081] Figure 6 A structure diagram of an electromagnetic valve performance detection platform is provided for the present application;

[0082] Figure 7 The application provides a schematic diagram of an overflow valve test interface of the electromagnetic valve performance detection platform,

[0083] Figure 8 The application provides a schematic diagram of an overflow valve test interface of the electromagnetic valve performance detection platform,

[0084] Figure 9 The application provides a schematic diagram of an overflow valve test interface of the electromagnetic valve performance detection platform,

[0085] Figure 10 The application provides a schematic diagram of an overflow valve test interface of the electromagnetic valve performance detection platform,

[0086] Figure 11 The application provides a schematic diagram of an overflow valve test interface of the electromagnetic valve performance detection platform,

[0087] Figure 12 The application provides a schematic diagram of an overflow valve test interface of the electromagnetic valve performance detection platform,

[0088] Figure 13 The application provides a schematic diagram of an overflow valve test interface of the electromagnetic valve performance detection platform,

[0089] Figure 14 The application provides a schematic diagram of an overflow valve test interface of the electromagnetic valve performance detection platform.

[0090] Marked with the following figure:

[0091] 1, the foma wheel, 2, the oil tank, 3, the motor, 4, the filter, 5, the gear pump, 6, the test base, 7, the protective cover, 8, the pressure gauge, 9, the emergency stop button, 10, the industrial control display screen, 11, the running three color indicating lamp, 12, the keyboard, 13, the buzzer, 14, the filter assembly, 15, the resistance table, 16, the cooler, 17, the test cabinet, 18, the operation table, 19, the first fixed bottom plate, 20, the second fixed bottom plate, 21, the connecting pipeline. DETAILED DESCRIPTION

[0092] The specific embodiment of the application will be described below in combination with the drawings and examples:

[0093] It should be noted that the structures, colors, proportions, sizes, etc. shown in the drawings attached to the present specification are only used to cooperate with the content disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the defined conditions that can be implemented by the present application. Any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effect and purpose that can be produced by the present application, should still fall within the scope covered by the disclosed technical content of the present application.

[0094] At the same time, in the description of the present invention, it should be understood that the terms "one end", "the other end", "middle", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0095] Furthermore, the terms “first,” “second,” “third,” and “fourth” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as “first,” “second,” “third,” or “fourth” may explicitly or implicitly include at least one of those features.

[0096] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0097] Example 1:

[0098] like Figures 1-6 As shown, the present invention discloses a solenoid valve performance testing platform, comprising a test cabinet 17 and an operating table 18. The operating table 18 is located on top of the operating cabinet. The test cabinet 17 houses the components required for testing. The four sides of the test cabinet 17 are provided with necessary heat dissipation holes to quickly dissipate the heat generated by the hydraulic system and electrical components inside the cabinet, preventing excessively high oil temperatures from affecting the viscosity of the hydraulic oil and preventing electrical components from malfunctioning due to high temperatures, thus ensuring the continuous and reliable operation of the equipment. The operating table 18 on top of the test cabinet 17 is equipped with an industrial control computer for operator operation and calculation analysis. In addition, the operating table 18 is also equipped with necessary switches and buttons.

[0099] The test cabinet 17 is provided with a hydraulic system and a test base 6, and the hydraulic system is provided with a motor 3, a gear pump 5, an oil tank 2, a filter assembly 14, a filter 4, a resistance meter 15 and a cooler 16. The oil tank 2 stores oil, the gear pump 5 is connected with the oil tank 2, the gear pump 5 is connected with an electric proportional overflow valve, the electric proportional overflow valve is used for loading the gear pump 5 and adjusting the pressure of the hydraulic system, and the resistance meter 15 is used for detecting the insulation resistance and coil voltage resistance value of the electromagnetic valve according to the instruction of the electrical control judgment system. The hydraulic system comprises a main system oil supply pressure building circuit, a bridge loading circuit, a oil leakage flow meter circuit and an oil leakage bypass circuit.

[0100] The test base 6 is used for fixing the test valve, after the test valve is fixed by the test base 6, the performance of the test valve is detected by the hydraulic system, and after the test is completed, the industrial computer on the operation table 18 processes and analyzes the test data.

[0101] The test cabinet 17 is provided with an auxiliary door for maintenance and pressure test, the position of the auxiliary door corresponds to the position of the hydraulic system, and when the hydraulic system fails, the auxiliary door can be directly opened for maintenance without opening the cabinet door. In addition, the auxiliary door also reserves a high-pressure interface, which is used for connecting a high-pressure hose and a high-pressure ball valve to guide the stable oil pressure output by the main system oil supply pressure building circuit to an external equipment to be tested, replacing the traditional manual pressure test mode, reducing the labor cost, and at the same time, the pressure test pressure is controlled in real time through the pressure monitoring assembly in the circuit, so that the pressure test process is safe and controllable.

[0102] The main system oil supply pressure building circuit is used for providing a stable and controllable high-pressure oil source for the hydraulic system, meeting the basic hydraulic power demand of the test valve performance detection, adjusting the pressure and oil flow of the hydraulic system and controlling the switching of the oil flow direction, so as to adapt to the detection actions of the test valve such as forward conduction and reverse sealing, and cooperate with the bridge circuit to provide a basic oil source for bidirectional loading detection. In addition, the overflow protection function of the electric proportional overflow valve can prevent the system pressure from being abnormally overloaded, and the linkage electrical control judgment system realizes interlocking protection when the pressure is abnormal, so as to protect the safety of the gear pump 5, the pipeline and the test valve, and ensure that the test valve can complete the detection of key performances such as action voltage and leakage under standard working conditions.

[0103] The bridge loading circuit is used for providing bidirectional loading pressure for the test valve, simulating the forward conduction and reverse sealing working conditions in the actual work.

[0104] The oil leakage bypass circuit is composed of a back pressure valve, a check valve and a bypass pipeline, and is used to adjust the pressure during oil leakage to prevent the performance of the test valve from being affected or damaged due to excessive back pressure while ensuring the normal implementation of the oil leakage function of the hydraulic system. When the test valve is leaking, the oil preferentially returns to the oil tank 2 through the oil leakage flow meter circuit. If the flow meter is blocked or the back pressure exceeds the limit, the back pressure valve of the bypass circuit automatically opens to guide the oil to return to the oil tank 2 through the bypass pipeline, ensuring smooth oil leakage.

[0105] The oil leakage flow meter circuit is composed of a high-precision oil leakage flow meter, a stop valve and an oil leakage pipeline, and is used to measure the leakage flow of the test valve to provide data basis for judging the sealing performance of the test valve. When the test valve needs to leak, the oil enters the oil leakage bypass circuit through the oil leakage pipeline, and the flow meter in the oil leakage flow meter circuit accurately measures the flow of the leaked oil to obtain the leakage flow data of the test valve, so as to evaluate the sealing performance of the test valve.

[0106] The operating table 18 is provided with a pressure gauge 8, an emergency stop button 9, a buzzer 13 and a cabinet. The pressure gauge 8 is used to monitor the pressure state at different positions in the hydraulic circuit in real time to provide intuitive data support for detection accuracy control, system safety protection and fault troubleshooting; the emergency stop button 9 is used to forcibly stop the test work to ensure the safety of the test process; the cabinet is provided with a running three-color indicator light 11 at the top, so that the operating personnel can quickly know the running status of the electromagnetic valve performance detection platform from a distance through the three-color indicator light, respond to potential problems in time, and ensure production safety and efficiency; the buzzer 13 is used to issue a sound alarm.

[0107] The cabinet is provided with an electrical control and judgment system and a direct current stabilized power supply. The direct current stabilized power supply is used to supply power to the electrical control and judgment system. The electrical control and judgment system is connected to the test valve to obtain various data of the test valve and process and analyze the collected data to obtain various data of the test valve.

[0108] The side of the cabinet is provided with an industrial control display screen 10 and a keyboard 12 connected to the electrical control and judgment system. The operation page and the monitored data are displayed on the industrial control display screen 10. The operator issues instructions through the keyboard 12 to complete various operation processes.

[0109] The electrical control and judgment system is composed of a PLC control system and a computer control system. The PLC control system and the computer control system keep real-time communication,

[0110] The bottom of the operating cabinet is provided with four Forma wheels 1 arranged at the feet. When the detection platform needs to be moved, the wheels are adjusted to contact the ground, and one person can push the equipment to realize flexible movement of the equipment. After the detection platform is in place, the supporting feet are adjusted in the opposite direction to replace the wheels to contact the ground, so as to stably support the detection platform on the ground, and the supporting height can be adjusted to ensure that the whole detection platform is in a horizontal state.

[0111] The main system oil supply and pressure building circuit comprises an oil supply pipeline, an oil return circuit and a reversing circuit. The oil tank 2 stores oil; the gear pump 5 is connected with the oil tank 2, and the gear pump 5 is connected with an electric proportional overflow valve; the oil supply pipeline is used for conveying the oil output by the gear pump 5 to each component of the system; the oil return circuit passes through the bridge circuit, and the oil return circuit is used for guiding the oil after work to flow back to the oil tank 2; and the reversing circuit is used for controlling the flow direction of the oil to realize the switching of different working states.

[0112] The main system oil supply and pressure building circuit is provided with a high-precision flowmeter and a high-pressure flowmeter, the high-precision flowmeter is used for measuring the oil flow in the circuit where the gear pump 5 is located, and the high-pressure flowmeter is used for detecting the overall oil flow of the main system oil supply and pressure building circuit.

[0113] The circuit principle is as follows: after the gear pump 5 is started, the oil in the oil tank 2 is sucked and pressurized, and then output through the oil supply pipeline; the oil is distributed to different working paths of the system through the reversing circuit to perform corresponding work tasks. The oil after work returns to the oil tank 2 through the oil return circuit, forming a complete oil circulation. In the oil return process, the oil passes through the bridge circuit, and at this time, the electric proportional overflow valve plays a key role. The electric proportional overflow valve can accurately adjust the opening degree according to the size of the input electric signal, thereby loading the gear pump 5 and realizing the adjustment of the system pressure; at the same time, the electric proportional overflow valve has an overflow protection function, and when the system pressure is out of limit, the overflow valve automatically opens to release oil, preventing the gear pump 5 from being overloaded and the pipeline from being burst. At the same time, the high-precision flowmeter measures the oil flow in real time, providing data support for the system operation state monitoring. In addition, the high-pressure flowmeter provided in the main circuit can detect the overall flow of the current system, ensuring that the system flow is within the normal range.

[0114] The bridge loading circuit comprises a gear pump test circuit and a bridge circuit, the gear pump test circuit is used for providing stable oil supply for the test valve to ensure that the test valve can obtain the required working medium during the test process; the bridge circuit is used for realizing the bidirectional loading function; the electric proportional overflow valve is used for loading the gear pump 5 and adjusting the pressure of the hydraulic system, so that the pressure of the hydraulic system reaches different pressure values required by the test, and provides test conditions of multiple working conditions for the test valve.

[0115] The bridge loading circuit is also provided with an electromagnetic plug, the electromagnetic plug is used for receiving an electric signal, and the oil circuit is reversed by controlling the flow direction of the oil, so that the test valve can be tested in different working states.

[0116] The circuit principle is that the test valve obtains oil supply through the gear pump 5 test circuit, the electromagnetic plug realizes reversing according to the control signal, and the oil flow direction is changed. The bridge circuit realizes bidirectional loading, and can apply load to the test valve whether the oil flows forward or reversely. In this process, the electric proportional overflow valve controls the oil return amount by adjusting the opening degree, so as to improve the system pressure, simulate the working environment of the test valve under different working conditions, and realize comprehensive testing of the performance of the test valve.

[0117] The fixed frame is arranged in the operation cabinet, the test base 6 is arranged in the fixed frame, displacement and vibration interference are avoided through physical limiting, the position of the test base 6 is stable, the measurement error of the test valve is reduced, meanwhile, the test base 6 is prevented from falling off due to bearing or external force, and the operation safety is improved.

[0118] The test base 6 comprises two corresponding first fixed feet welded in the fixed frame, the first fixed feet are fixed with corresponding second fixed feet through bolts, the test base 6 is fixed on the side of the two second fixed feet, two corresponding first fixed feet are welded in the fixed frame, the first fixed feet are welded in the fixed frame, the first fixed feet are fixed with corresponding second fixed feet through bolts, and the test base 6 is fixed through the two second fixed feet, so that the stability of the fixing is ensured. The second fixed feet are fixed on the side of the first fixed feet through bolts, and the detachable function of the test base 6 is realized.

[0119] The test base 6 is provided with a connecting pipeline 21, the electromagnetic valve is fixed on the test bench through the test base 6, and then connected with the measured electromagnetic valve through the joint on the stainless steel pipeline. After the connection is completed, the protective cover 7 is covered.

[0120] The rectangular transparent protective cover 7 corresponding to the test base 6 is arranged on the operation table 18, covers the test base 6 and the test valve, and isolates the high-pressure oil and the electrical circuit: if the pipeline interface leaks during the detection process, the high-pressure oil is limited in the protective cover 7, so that the spraying injury is avoided; meanwhile, the operator is prevented from touching the live parts by mistake, and the risk of electric shock is reduced.

[0121] In addition, there may be dust, metal debris and other sundries in the test environment, which may fall into the connection part of the base and the test valve. On the one hand, it may block the hydraulic oil way and affect the normal flow of the oil, resulting in inaccurate detection results. At the same time, the protective cover 7 can isolate the external vibration, airflow and other interference factors to a certain extent, and reduce the rapid change of environmental factors within a certain range, for example, prevent the rapid entry of external cold air into the base area to cause the oil temperature to drop sharply.

[0122] The protective cover 7 is preferably a rectangular transparent protective cover 7. The rectangular structure can accurately match the regular installation layout of the test platform base and the test valve, maximize the use of space, and be designed in length, width and height according to the size of the valve to ensure complete coverage of the detection area. The planar transparent wall has no visual obstruction dead angle, and the operator can clearly observe the test valve action and oil state from multiple angles. The rectangular stable structure is convenient for fixed installation with the platform frame.

[0123] The maximum working pressure of the hydraulic system is 31.5 MPa, the rated working pressure of the hydraulic system is 21 MPa, the maximum flow rate of the hydraulic system is 9 L / min, and the volume of the oil tank 2 is 40 L. The maximum pressure of 31.5 MPa can meet the detection requirements of high-pressure working conditions, the rated pressure of 21 MPa ensures the stability of the conventional detection, the flow rate of 9 L / min is suitable for testing small-diameter valves, and the volume of 40 L of the oil tank 2 ensures the sufficiency of the system circulating oil, which is suitable for industrial conventional detection and provides basic hydraulic conditions for performance testing of the test valve.

[0124] The gear pump 5 adopts a low-noise internal meshing gear pump 5. The internal meshing structure can reduce oil leakage and improve volumetric efficiency to ensure stable output of L / min flow rate under the maximum pressure of 31.5 MPa. At the same time, the low-noise internal meshing gear pump 5 has low sensitivity to oil pollution, and can prolong the service life in combination with the circulating filtration system of the L oil tank 2, thereby providing continuous and low-noise hydraulic power for the detection of the test valve.

[0125] The PLC control system takes PLC as the hardware control core to realize the start-stop control and interlock protection function of each motor 3 in the electrical control judgment system, and to control the opening and closing action of the electromagnetic valve in the hydraulic system. The electromagnetic valve is adjusted, and the key points in the whole system such as liquid level, filter 4 blockage and temperature are monitored in real time. When abnormal conditions occur, the external equipment is interlocked protected, and the three-color indicator light is triggered to alarm immediately.

[0126] The PLC control system includes a PLC host, an input module, an output module, a communication module, and a sensor liquid level sensor, a temperature sensor, and a pressure sensor. The PLC host is used to receive signals from the input module, process the signals according to a pre-written program, and send the processed results to the output module. The input module is used to collect signals in the electrical control judgment system and convert them into electrical signals recognizable by the PLC host. The output module is used to convert the control signals processed by the PLC host into drive signals to drive external devices. The communication module is used for real-time communication between the PLC control system and the computer control system. The above-mentioned modules cooperate with each other to realize the control, monitoring and protection functions.

[0127] Control function: receive the instructions issued by the staff through the keyboard 12, control the start and stop of the gear pump 5, the reversing of the electromagnetic plug and the pressure regulation of the electric proportional overflow valve, etc.

[0128] Monitoring function: collect key point data of the system through sensors and display and remind;

[0129] Protection function: when an abnormality is detected on the detection platform, the three-color indicator light on the top of the drive operation cabinet is driven to alarm.

[0130] The computer control system includes a LabView test platform, which reads and writes the data and state of the PLC control system in real time, makes logical judgments, realizes point-to-point control, and completes the calculation and analysis process through existing software.

[0131] The LabView test platform displays a man-machine interface through the industrial control display screen 10, and the LabView test platform provides the operation personnel with operation, recording, monitoring, testing, querying or storage functions through the keyboard 12. The staff issues corresponding instructions or observes the detection results on the keyboard 12 according to the pages displayed on the industrial control display screen 10.

[0132] During the detection process, the operator starts the equipment through the key switch, selects the detection type such as electromagnetic valve action voltage test or overflow valve leakage test on the keyboard 12, and the system automatically starts the hydraulic circuit and data acquisition. After the test is completed, the electrical control judgment system displays the unqualified result, and generates a report containing test parameters, curves and conclusions.

[0133] The pressure gauges 8 are provided with four, which are a main system oil supply pressure monitoring gauge, an electric proportional overflow valve rear pressure monitoring gauge, a bridge type loading circuit pressure monitoring gauge and a test valve oil leakage end pressure monitoring gauge. The four pressure gauges 8 monitor different positions respectively, so that the pressure at the important position of the hydraulic system can be observed by the staff in real time.

[0134] The main system oil supply pressure monitoring gauge is installed at the outlet end of the gear pump 5 of the main system oil supply pressure building circuit, which is used to display the initial pressure output by the gear pump 5 in real time. The electric proportional overflow valve rear pressure monitoring gauge is installed at the outlet side of the electric proportional overflow valve of the main system oil supply pressure building circuit, which is used to monitor the pressure of the hydraulic system after being adjusted by the overflow valve. The bridge type loading circuit pressure monitoring gauge is installed at the oil inlet end or the test valve loading port of the bridge type loading circuit, which is used to monitor the actual pressure when the test valve is bidirectionally loaded. The test valve oil leakage end pressure monitoring gauge is installed at the test valve oil leakage port of the oil leakage bypass circuit, which is used to monitor the back pressure during the test valve oil leakage process.

[0135] Example 2

[0136] The test process of the overflow valve in the electromagnetic valve performance detection platform of the application is as follows:

[0137] As Figure 7 shown, after installing the test valve, select the working voltage value of the overflow valve. Turn on the oil pump motor, open the ball valve 19.3, and test the oil circulation. At the same time, understand the cleanliness level of the test oil through the particle counter, and complete the following test items after meeting the test conditions.

[0138] 1. Pressure regulating range and stability test,

[0139] As Figure 8 shown, under the overflow valve test interface, select the pressure regulating range test tab.

[0140] Adjust the system pressure valve 12.1 to 115% of the upper limit of the test valve pressure regulating range, and adjust the motor speed to make the flow through the test valve be the test flow. Test the test overflow valve from full open to full close, and observe the pressure change.

[0141] Adjust the pressure of the test valve A port to 0.5Mpa, gradually increase the flow to the rated flow of the test valve, adjust the flow to 5 points at equal intervals, and save 5 groups of data. Increase the pressure of the test valve A port to the set value, repeat the above test, save 5 groups of data, and the steady-state pressure-flow characteristic can be tested at different set pressure values. Test 6 groups, and each group has 5 data. The test results are shown in Figure 9 .

[0142] 2. Internal leakage test,

[0143] Under the overflow valve test interface, select the internal leakage test tab.

[0144] Adjust the test valve and the system pressure valve 12.1 so that the test valve reaches the upper limit of the pressure regulating range, and adjust the motor speed to make the flow through the test valve be the test flow. Adjust the system pressure valve 12.1 to drop to 5% of the upper limit of the test valve pressure regulating range, and observe the internal leakage of the test valve overflow valve T port after 30s. Determine whether there is flow output through the leakage flowmeter.

[0145] After the test is completed, a report file is automatically generated, and the report file is stored in the form of date+overflow valve model+test number.

[0146] Example 3:

[0147] The test process of the electromagnetic reversing valve test in the electromagnetic valve performance detection platform of the application is as follows:

[0148] After installing the test valve, select the valve working voltage value.

[0149] As Figure 10As shown, open the oil pump motor, open the ball valve 19.3, test the oil circulation. At the same time, through the particle counter to understand the cleanliness level of the test oil, after meeting the test conditions, the following test items are completed.

[0150] 1. Pressure resistance test,

[0151] As shown, in the electromagnetic reversing valve test interface, select the pressure test tab, set the pressure resistance pressure value according to the test valve, select the pressure test oil port, fill in the pressure test time, and observe whether there is leakage. Figure 11

[0152] Open the oil pump motor, adjust the system overflow valve 12.1 to the required pressure, open the T port ball valve 19.2, and the test reversing valve is reversed, that is, the pressure resistance characteristics of the oil port A or the oil port B can be tested respectively. Take the pressure resistance test of the oil port A as an example.

[0153] 2. Pressure loss test,

[0154] As shown, in the electromagnetic reversing valve test interface, select the pressure test tab, select the pressure loss test circuit. Figure 12 Open the oil pump motor, adjust the system overflow valve 12.1 to the required pressure, open the T port ball valve 19.2, A port electromagnetic valve 16.1 and B port electromagnetic valve 16.2; the test reversing valve is reversed, and the P-A and B-T pressure loss values in the whole action process of the reversing can be obtained during the reversing process, and the maximum pressure loss value and the pressure loss value curve in this process are automatically recorded. Take P->A->B->T as an example.

[0155]

[0156] 3. Internal leakage test,

[0157] As shown, in the electromagnetic reversing valve test interface, select the internal leakage test tab. Figure 13 Open the oil pump motor, adjust the system overflow valve 12.1 to the required pressure, open the T port ball valve 19.1, and according to the internal leakage test requirement, open the A port electromagnetic valve and the B port electromagnetic valve 16.2; automatically record the internal leakage curve in the leakage test time. The test report file generated is as shown in

[0158] Figure 14 The preferred embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge possessed by those skilled in the art without departing from the purpose of the present application.

[0159] The preferred embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge possessed by those skilled in the art without departing from the purpose of the present application.

[0160] Many other changes and modifications can be made without departing from the concept and scope of the present application. It should be understood that the present application is not limited to a specific embodiment, and the scope of the present application is defined by the appended claims.​​​

Claims

1. A solenoid valve performance detection platform, characterized in that, it comprises a test cabinet (17) and an operation table (18), the operation table (18) is arranged on the top of the operation cabinet, a test base (6) and a hydraulic system are arranged in the test cabinet (17), the hydraulic system is provided with a motor (3), a gear pump (5), an oil tank (2), a filter assembly (14), a filter (4), a resistance meter (15) and a cooler (16), the oil tank (2) stores oil, the gear pump (5) is connected with the oil tank (2), the gear pump (5) is connected with an electric proportional overflow valve, the electric proportional overflow valve is used for loading the gear pump (5) and adjusting the pressure of the hydraulic system, the resistance meter (15) is used for detecting the insulation resistance and coil voltage resistance of the solenoid valve according to the instruction of the electrical control judgment system, an auxiliary door for maintenance and pressure test is arranged on the side of the test cabinet (17), the hydraulic system comprises a main system oil supply and pressure building circuit, a bridge loading circuit, a drain flow meter circuit and a drain bypass circuit, the main system oil supply and pressure building circuit is used for providing a stable and controllable high pressure oil source for the hydraulic system, adjusting the pressure, oil flow and switching the oil flow direction of the hydraulic system, the bridge loading circuit is used for providing bidirectional loading pressure for the test valve, the drain bypass circuit is used for adjusting the pressure during the drain process while ensuring the normal implementation of the drain function of the hydraulic system, the drain flow meter circuit is used for measuring the leakage flow of the test valve, the test base (6) is used for fixing the test valve, a pressure gauge (8), an emergency stop button (9), a buzzer (13) and a cabinet are arranged on the operation table (18), a running three-color indicator light (11) is arranged on the top of the cabinet, an electrical control judgment system and a DC stabilized power supply are arranged in the cabinet, an industrial control display screen (10) and a keyboard (12) connected with the electrical control judgment system are arranged on the side of the cabinet, the DC stabilized power supply is used for supplying power to the electrical control judgment system, the electrical control judgment system is composed of a PLC control system and a computer control system, the PLC control system and the computer control system keep real-time communication, a Foma wheel (1) is arranged on the bottom of the operation cabinet.

2. The solenoid valve performance detection platform according to claim 1, characterized in that, the main system oil supply and pressure building circuit comprises an oil supply oil pipe, an oil return circuit and a reversing circuit, the oil supply oil pipe is used for conveying the oil output by the gear pump (5) to each component of the system, the oil return circuit passes through the bridge circuit, and the oil return circuit is used for guiding the oil after work to return to the oil tank (2), the reversing circuit is used for controlling the flow direction of the oil to realize the switching of different working states, the main system oil supply and pressure building circuit is provided with a high precision flow meter and a high pressure flow meter, the high precision flow meter is used for measuring the oil flow of the circuit in which the gear pump (5) is arranged in the main system oil supply and pressure building circuit, the high pressure flow meter is used for detecting the overall oil flow of the main system oil supply and pressure building circuit.

3. The electromagnetic valve performance detection platform according to claim 1 or 2, characterized in that the bridge loading circuit comprises a gear pump (5) test circuit and a bridge circuit, the gear pump (5) test circuit is used to provide stable oil supply for the tested valve to ensure that the tested valve can obtain required working medium during the test, and the bridge circuit is used to realize bidirectional loading function.

4. The electromagnetic valve performance detection platform according to claim 1 or 2, characterized in that the operation cabinet is provided with a fixed frame, and the test base (6) is arranged in the fixed frame.

5. The electromagnetic valve performance detection platform according to claim 1 or 2, characterized in that a rectangular transparent protective cover (7) corresponding to the test base (6) is arranged on the operation table (18).

6. The electromagnetic valve performance detection platform according to claim 1 or 2, characterized in that the maximum working pressure of the hydraulic system is 31.5 MPa, the rated working pressure of the hydraulic system is 21 MPa, the maximum flow of the hydraulic system is 9 L / min, and the volume of the oil tank (2) is 40 L.

7. The electromagnetic valve performance detection platform according to claim 1 or 2, characterized in that the gear pump (5) is a low-noise internal gear pump.

8. The electromagnetic valve performance detection platform according to claim 1 or 2, characterized in that the PLC control system takes PLC as a hardware control core to realize start-stop control and interlocking protection function of each motor (3) in the electrical control judgment system and to control the opening and closing of the electromagnetic valve in the hydraulic system, and to adjust the electromagnetic valve.

9. The electromagnetic valve performance detection platform according to claim 1 or 2, characterized in that the PLC control system comprises a PLC host, an input module, an output module and a communication module, the PLC host is used to receive signals of the input module, process the signals according to a pre-written program and send the processing results to the output module, the input module is used to collect signals in the electrical control judgment system and convert the signals into electrical signals recognizable by the PLC host, the output module is used to convert the control signals processed by the PLC host into driving signals for driving external devices, and the communication module is used to realize real-time communication between the PLC control system and the computer control system. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The LabView test platform displays a man-machine interface through the industrial display screen (10), The LabView test platform is provided with a keyboard (12) for an operator to complete operation, record, monitor, test, query or storage functions.

10. The electromagnetic valve performance detection platform according to claim 9, characterized in that, The pressure gauges (8) are provided in four, specifically a main system oil supply pressure monitoring gauge, an electric proportional overflow valve rear pressure monitoring gauge, a bridge type loading circuit pressure monitoring gauge and a test valve oil leakage end pressure monitoring gauge, The main system oil supply pressure monitoring gauge is installed at the outlet end of the gear pump (5) of the main system oil supply pressure building circuit, for real-time display of the initial pressure output by the gear pump (5); The electric proportional overflow valve rear pressure monitoring gauge is installed at the outlet side of the electric proportional overflow valve of the main system oil supply pressure building circuit, for monitoring the pressure of the hydraulic system after adjustment by the overflow valve; The bridge type loading circuit pressure monitoring gauge is installed at the oil inlet end of the bridge type loading circuit or the test valve loading port, for monitoring the actual pressure when the test valve is bidirectionally loaded; The test valve oil leakage end pressure monitoring gauge is installed at the test valve oil leakage port of the oil leakage bypass circuit, for monitoring the back pressure during the test valve oil leakage process.

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