Heavy water reactor loading and unloading machine hydraulic valve and motor test bed and test method

Abstract

The invention relates to the technical field of valve and motor testing, in particular to a heavy water reactor loading and unloading machine hydraulic valve and motor test bed and a test method.The test bed comprises a test bed panel, a fixing frame, a control device, a test bed table top, an oil leakage hole and an oil tank, and the middle of the upper end of the test bed panel is movably connected with the fixing frame; the lower end of the fixing frame is movably connected with control equipment. The middle part of the front end of the test bed panel is provided with a test bed table board, the test bed table board is of a concave structure, a plurality of oil leakage holes are embedded in the structure of the test bed table board, an oil tank is arranged below the test bed table board, the oil leakage holes are communicated with the oil tank, and hydraulic oil enters the oil tank through the oil leakage holes. According to the invention, a test environment can be provided for multiple types of valve groups and motors, a visual parameter display curve is generated, and the work maintenance efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of valve and motor testing, and particularly relates to a hydraulic valve and motor test bench and test method for a heavy water reactor refueling machine. Background Art

[0002] The heavy water reactor refueling machine requires a variety of hydraulic valves and motors to cooperate to achieve the established functions. The reliability of the hydraulic valves and motors is an important guarantee for the safety and stability of the heavy water reactor refueling machine. Therefore, a test bench is needed to conduct off-line tests on the hydraulic valves and motors to verify their functions.

[0003] In the prior art, the hydraulic test bench uses a fixed-displacement pump to supply oil to achieve multi-stage pressure oil output. However, it cannot meet the test requirements of various hydraulic valves and motors, nor can it intuitively display the performance curve of the hydraulic valve. There is also no special test bench for testing and verifying the hydraulic valves and motors of the heavy water reactor refueling machine. Summary of the Invention

[0004] The present invention provides a hydraulic valve and motor test bench and test method for a heavy water reactor refueling machine, which is used to solve the problems that the existing test bench cannot test the working conditions of various hydraulic valves and motors and cannot display the performance curve of the hydraulic valve.

[0005] The technical solution of the present invention is as follows:

[0006] The present invention proposes a hydraulic valve and motor test bench for a heavy water reactor refueling machine. The test bench includes a test bench panel, a fixing frame, control equipment, a test bench tabletop, an oil leakage hole, and an oil tank. The middle part of the upper end of the test bench panel is movably connected to the fixing frame, and the lower end of the fixing frame is movably connected to the control equipment; the middle part of the front end of the test bench panel is provided with a test bench tabletop, the test bench tabletop is set as a concave structure, and several oil leakage holes are embedded in the structure of the test bench tabletop. An oil tank is provided below the test bench tabletop, and the oil leakage holes are communicated with the oil tank, and the hydraulic oil enters the oil tank through the oil leakage holes.

[0007] In some embodiments, there is a control box on one side of the test bench panel. The control box is used for the input and output of test bench signals and the control of the actuators; drag doors are provided on both sides of the rear end of the test bench panel. An electric motor, an oil pump, and pipelines are provided inside the drag doors. The oil pump is connected to the electric motor, and the oil pump is connected to the test bench panel and the oil tank through the pipelines. The electric motor receives the control signal of the control equipment, and the electric motor drives the oil pump to input the hydraulic oil from the oil tank into the hydraulic motor or the valve group; a detachable shutter is provided on one side of the test bench panel, and the shutter is used for heat dissipation and ventilation.

[0008] In some embodiments, the test bench panel includes a motor test component, a torque controller, a voltage selection switch, a main oil circuit pressure control valve, a valve group oil supply port, a valve group power socket, and a valve group oil return port. The motor test component is arranged on the left side of the test bench panel and is used for conducting hydraulic motor tests; the torque controller is arranged on the right side of the motor test component and is used to provide a load for the hydraulic motor; a voltage selection switch is arranged below the torque controller, and a main oil circuit pressure control valve is arranged on the right side of the voltage selection switch. The main oil circuit pressure control valve is used to adjust the maximum pressure of the test bench; on the right side of the torque controller, there are 4 groups of valve group oil supply ports arranged at the same height. Below the valve group oil supply ports, there are 2 groups of valve group power sockets, and below the 2 groups of valve group power sockets, there are 4 groups of valve group oil return ports; the connectors of the 4 groups of valve group oil supply ports have 3 specifications, which are 1 / 2 inch, 3 / 4 inch, and two groups of 3 / 8 inches respectively; the sizes of the 4 groups of valve group oil return ports correspond to the corresponding valve group oil supply ports. The valve group oil supply ports and the valve group oil return ports are used to test different types of hydraulic valves; the valve group oil supply ports and the valve group oil return ports are connected to the fuel tank. During the hydraulic valve group test, the hydraulic oil enters the valve group to be tested from the valve group oil supply port, and the hydraulic oil returns to the fuel tank from the valve group to be tested through the valve group oil return port.

[0009] In some embodiments, the voltage selection switch is used for voltage selection in the hydraulic valve group test, and the voltage selection switch can select 120V and 24V; a lighting lamp is arranged at the center of the top of the test bench panel.

[0010] In some embodiments, the motor test component includes a motor mounting surface, a motor oil port quick-connect fitting, a motor pressure gauge, a main oil circuit pressure gauge, a valve group circuit pressure gauge, a power indicator instrument, a fuel tank oil temperature gauge, a main oil circuit flowmeter, and a motor oil leakage flowmeter. The motor mounting surface is arranged at the lower left part of the test bench panel, and below the motor mounting surface, there are 3 groups of motor oil port quick-connect fittings, and the 3 groups of motor oil port quick-connect fittings are respectively used for connecting to the oil inlet, oil return, and oil leakage ports of the hydraulic motor; the motor oil leakage flowmeter, the main oil circuit flowmeter, and the fuel tank oil temperature gauge are arranged side by side above the motor mounting surface; the motor pressure gauge, the main oil circuit pressure gauge, and the valve group circuit pressure gauge are arranged side by side above the motor oil leakage flowmeter, the main oil circuit flowmeter, and the fuel tank oil temperature gauge respectively.

[0011] In some embodiments, the control device includes a controller, a display screen, control buttons, and a control knob. The controller has the test bench control software built in. The controller is electrically connected to the test bench panel and the control box. The controller receives the measurement data from the measuring instruments on the test bench panel and transmits control signals to the test bench panel and the control box. The display screen is arranged at the upper front end of the controller. The display screen shows the parameters of the measuring instruments and the curve graphs of various parameters during the test process. Control buttons are provided at the lower end of the display screen. The control buttons control the start and stop of the motor through the controller and select the test type, including valve group or hydraulic motor test. A control knob is provided on the right side of the display screen. The control knob is used to adjust the flow rate of the hydraulic oil in the system, the forward and reverse rotation of the hydraulic motor, and the phase selection of the hydraulic valves on the valve group to be tested.

[0012] In some embodiments, the control device is further provided with a moving rack and an emergency stop button. The emergency stop button is arranged at the front end of the controller, and the moving rack is arranged on both sides of the controller to control the movement of the controller.

[0013] In some embodiments, the lower end surface of the controller is higher than the upper end surface of the test bench, so that the controller does not contact the test bench.

[0014] The present invention provides a method for testing hydraulic valves of a heavy water reactor refueling machine, and the method includes:

[0015] Step 1: Place the valve group to be tested on the test bench surface, connect the oil inlet in the valve group to the oil supply port of the valve group circuit on the test bench through a pipeline, connect the oil outlet in the valve group to the oil return port of the valve group on the test bench, and connect the power supply interface of the solenoid valve to the electrical socket of the valve group on the test bench.

[0016] Step 2: Adjust the main oil circuit pressure control valve and the control knob to set the pressure and flow rate required for the valve group test. At the same time, the test bench body inputs hydraulic oil into the hydraulic valves of the valve group through the oil tank.

[0017] Step 3: The pressure gauge on the valve group circuit, the main oil circuit pressure gauge, and the main oil circuit flow meter respectively measure the pressure value inside the valve group, the pressure value of the test bench test system, and the flow rate value of the main oil circuit, and transmit the pressure value inside the valve group, the pressure value of the test bench test system, and the flow rate value to the controller, and display the curves of the flow rate value versus time and the pressure value versus time on the display screen.

[0018] Step 4: Observe the curve to judge the stability of the valve group.

[0019] The present invention provides a method for testing hydraulic valves of a heavy water reactor refueling machine, and the method includes:

[0020] Step 1: Mount the motor under test on the motor mounting surface through bolts. Connect the motor head of the motor under test to the torque controller through internal and external gears. Connect the oil inlet, oil return port, and oil drain port of the motor to three groups of motor oil port quick connectors through pipelines and connectors respectively.

[0021] Step 2: Adjust the main oil circuit pressure control valve and the control knob to set the pressure and flow rate required for the motor test. At the same time, the test bench body inputs hydraulic oil into the oil inlet of the motor through the oil tank.

[0022] Step 3: Rotate the control knob to select the forward and reverse rotation of the motor, and set the motor load through the torque controller.

[0023] Step 4: The motor pressure gauge, motor oil drain flow meter, and main oil circuit flow meter measure the pressure, oil drain volume of the motor, and the flow rate of the main oil circuit of the test system respectively. The oil drain volume, pressure of the motor, and the flow rate of the main oil circuit of the test system are transmitted to the controller 31, and the curves of the oil drain volume, flow rate value, and pressure value versus time are displayed on the display screen 32.

[0024] Step 5: Observe the curve of the oil drain volume to determine whether the motor meets the requirements.

[0025] Implementing the present invention has the following beneficial effects:

[0026] 1. The present invention provides a hydraulic valve and motor test bench and test method for a heavy water reactor refueling machine. In the valve group test, by connecting the valve group to the test bench, hydraulic oil is supplied to the hydraulic valve of the heavy water reactor refueling machine, and the pressure and flow characteristics of the valve are tested. By reading the curves of the flow rate and pressure versus time displayed on the display, it is judged whether the valve group is in good condition.

[0027] 2. The present invention provides a hydraulic valve and motor test bench and test method for a heavy water reactor refueling machine. There are 4 groups of oil outlet ports and 4 groups of oil return ports on the operation panel of the present invention, and the 4 groups of oil outlet ports and 4 groups of oil return ports have 3 kinds of connector sizes. Different models of hydraulic valves can be tested through different interfaces, and different models of hydraulic valves can be centrally tested at the same time, improving the work and maintenance efficiency.

[0028] 3. The present invention provides a hydraulic valve and motor test bench and test method for a heavy water reactor refueling machine. In the motor test, the motor is mounted on the motor mounting surface on the front of the test bench. The forward and reverse rotation of the motor is controlled by the control device, the load is adjusted through the torque controller, and the relevant information such as the flow rate, oil drain volume, and pressure during the operation of the hydraulic motor can be real-time displayed on the display screen. Thus, the test bench can conveniently adjust and control the motor test parameters, improving the practicability of the test bench. Description of the Drawings

[0029] Figure 1The figure is a schematic diagram of the overall structure of a hydraulic valve and motor test bench for a heavy water reactor refueling machine according to an embodiment of the present invention;

[0030] Figure 2 The figure is a front view of the overall structure of a hydraulic valve and motor test bench for a heavy water reactor refueling machine according to an embodiment of the present invention;

[0031] Figure 3 The figure is a right view of the overall structure of a hydraulic valve and motor test bench for a heavy water reactor refueling machine according to an embodiment of the present invention;

[0032] Figure 4 The figure is a rear view of the overall structure of a hydraulic valve and motor test bench for a heavy water reactor refueling machine according to an embodiment of the present invention;

[0033] Figure 5 The figure is a rear view of the overall structure of a hydraulic valve and motor test bench for a heavy water reactor refueling machine according to an embodiment of the present invention;

[0034] Description of the drawings: 1. Test bench panel; 2. Fixed frame; 3. Control equipment; 4. Test bench tabletop; 5. Oil leakage hole; 6. Motor test assembly; 7. Control box; 8. Fuel tank; 10. Torque controller; 11. Voltage selection switch; 12. Main oil circuit pressure control valve; 13. Lighting lamp; 14. Valve group oil supply port; 15. Valve group power socket; 16. Valve group oil return port; 17. Drag door; 31. Controller; 32. Display screen; 33. Control button; 34. Control knob; 35. Moving frame; 60. Motor mounting surface; 61. Motor oil port quick connector; 62. Motor pressure gauge; 63. Main oil circuit pressure gauge; 64. Valve group circuit pressure gauge; 65. Power indicator instrument; 66. Fuel tank oil temperature gauge; 67. Main oil circuit flow meter; 68. Motor oil leakage flow meter. Detailed implementation manners

[0035] The technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings and specific implementation manners. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0036] As Figures 1 to 5As shown in the figure, the present invention proposes a hydraulic valve and motor test bench for a heavy water reactor refueling machine. The test bench includes a test bench panel 1, a fixing frame 2, control equipment 3, a test bench tabletop 4, an oil leakage hole 5, a control box 7, an oil tank 8, and a drag door 17. In the middle of the upper end of the test bench panel 1, there is a fixed connection with a fixing frame 2. At the lower end of the fixing frame 2, there is a movable connection with control equipment 3. In the middle of the front end of the test bench panel 1, there is a test bench tabletop 4. The test bench tabletop 4 is set as a concave structure. Inside the structure of the test bench tabletop 4, several oil leakage holes 5 are embedded. This design prevents hydraulic oil from flowing out of the test bench tabletop 4. Below the test bench tabletop 4, there is an oil tank 8. All the oil leakage holes 5 communicate with the oil tank 8, enabling hydraulic oil to flow into the oil tank 8 through the oil leakage holes 5. On the left side of the test bench panel, there is a control box 7. The control box 7 is used for the input and output of test bench signals and for controlling the actuators. Inside the control box 7, there is control equipment including a PLC host, an input / output module, and a PLC power supply. The PLC power supply is used to supply power to the PLC host, and the PLC host is used for signal control. On both sides of the rear end of the test bench panel, there are drag doors 17. Components such as the test bench motor, oil pump, and hydraulic pipelines are located inside the drag doors 17. The oil pump is connected to the motor, and the oil pump is connected to the test bench panel 1 and the oil tank 8 through hydraulic pipelines. The drag doors 17 facilitate the maintenance of internal components. The motor receives the control signal from the control equipment 3, and the motor drives the oil pump to input hydraulic oil from the oil tank 8 into the hydraulic motor or valve group. On the right side of the test bench panel 1, there is a detachable shutter, which is used for heat dissipation and ventilation.

[0037] The test bench panel 1 is composed of a motor test component 6, a torque controller 10, a voltage selection switch 11, a main oil circuit pressure control valve 12, a lighting lamp 13, a valve group oil supply port 14, a valve group power supply socket 15, and a valve group oil return port 16. On the left side of the test bench panel 1, there is a motor test component 6. On the right side of the motor test component 6, there are a torque controller 10 and a voltage selection switch 11. The torque controller 10 is used for the test condition of the motor leakage rate. The motor head is connected to the torque controller 10 through internal and external gears. The torque controller 10 provides a load for the motor during the test. The voltage selection switch 11 is located directly below the torque controller 10. The voltage selection switch 11 is used for the voltage selection of the solenoid valve in the valve group under the test condition of the hydraulic valve group. The knob can select 24V and 120V. The main oil circuit pressure control valve 12 is located on the right side of the voltage selection switch 11. The main oil circuit pressure control valve 12 is used to adjust the maximum pressure upper limit of the test bench system and plays a protective role.

[0038] On the right side of the test bench panel 1 and arranged at the same height as the torque controller 10 are 4 groups of valve block oil supply ports 14. The valve block oil supply ports 14 are used to input the hydraulic oil of the test bench system into the valve block through the valve block oil supply ports 14 under the valve block test conditions. Below the valve block oil supply ports 14 are 2 groups of valve block power supply sockets 15. The valve block power supply sockets 15 are used to supply power to the solenoid valves in the valve block under the valve block test conditions. Below the valve block power supply sockets 15 are 4 groups of valve block oil return ports 16. The valve block oil return ports 16 are used to return the hydraulic oil in the valve block to the fuel tank through the valve block oil return ports 16 under the valve block test conditions. The joint sizes of the 4 groups of valve block oil supply ports 14 and the 4 groups of valve block oil return ports 16 are 1 / 2 inch, 3 / 4 inch, and two groups of 3 / 8 inches respectively. Different types of hydraulic valves can be tested through different interfaces. For valves requiring a large flow rate, larger oil supply ports and oil return ports can be selected. Therefore, the test bench panel 1 of this test bench can centrally test different types of valves, improving the work and maintenance efficiency. The lighting lamp 13 is located in the middle of the top of the test bench panel 1. The lighting lamp 13 is used for lighting the test bench during all test processes.

[0039] The motor test assembly 6 is composed of a motor mounting surface 60, a quick-connect fitting 61 for the motor oil port, a motor pressure gauge 62, a main oil circuit pressure gauge 63, a valve group circuit pressure gauge 64, a power indicator instrument 65, a fuel tank oil temperature gauge 66, a main oil circuit flowmeter 67, and a motor drain oil flowmeter 68. The motor mounting surface 60 is located at the lower left of the test bench panel 1. One set of quick-connect fittings 61 for the motor oil port is arranged below the left side of the motor mounting surface 60, and two sets of quick-connect fittings 61 for the motor oil port are arranged below the right side of the motor mounting surface 60. The three sets of quick-connect fittings 61 for the motor oil port are used to connect the test bench to the inlet, return, and drain ports of the hydraulic motor during the hydraulic motor test. The drain port is connected to the topmost quick-connect fitting 61 among the three sets of quick-connect fittings 61 for the motor oil port. The motor pressure gauge 62, the main oil circuit pressure gauge 63, and the valve group circuit pressure gauge 64 are arranged side by side at the upper left of the test bench panel 1. The motor pressure gauge 62 is used to read the pressure value of the hydraulic motor during the hydraulic motor test; the main oil circuit pressure gauge 63 is used to read the pressure value of the system during the test bench test; the valve group circuit pressure gauge 64 is used to read the pressure value inside the valve group during the valve group test. Below the motor pressure gauge 62 is the motor drain oil flowmeter 68, which is used to read the leakage amount of the motor hydraulic oil during the hydraulic motor test. Below the main oil circuit pressure gauge 63 is the main oil circuit flowmeter 67, which is used to read the system flow value during the test bench test. Below the valve group circuit pressure gauge 64 is the fuel tank 8 oil temperature gauge 66, which is used to read the temperature value of the hydraulic oil in the fuel tank 8. The power indicator instrument 65 is located on the right side of the fuel tank oil temperature gauge 66, and the power indicator instrument 65 is used to indicate whether there is power supply for this test bench. The various layout arrangements of the motor test assembly 6 are such that pressure measuring instruments are arranged at the top, which is convenient for reading and monitoring the pressure values during the overall test process; flow measuring instruments are arranged in the middle to monitor the flow values during the test process; and operating components are arranged at the bottom, which is convenient for personnel to disassemble and assemble the test assembly. During the hydraulic motor test, the hydraulic motor is connected to the test bench according to the corresponding relationship of the inlet port, outlet port, and drain port, so as to simulate the working environment of the hydraulic motor, that is, the pressure and flow during operation, set the parameters of the test bench, and operate on the same vertical plane, which is convenient, fast, and the observation results are intuitive.

[0040] Such as Figure 5As shown in the figure, the control device 3 includes a controller 31, a display screen 32, control buttons 33, a control knob 34, and a moving bracket 35. The controller 31 is built-in with test bench control software. The controller 31 is electrically connected to the test bench frame panel 1 and the control box 7. The measurement data of the measuring instruments on the test bench frame panel 1 is transmitted to the controller 31. Among them, the measuring instruments include a motor pressure gauge 62, a main oil circuit pressure gauge 63, a valve group circuit pressure gauge 64, a power indicator instrument 65, an oil temperature gauge 66 for the oil tank 8, a main oil circuit flowmeter 67, and a motor drain oil flowmeter 68. The upper part of the front end of the controller 31 is provided with a display screen 32. The display screen 32 displays the parameters of the measuring instruments and the curve graphs of various parameters during the test process, including the hydraulic flowcharts, system pressure, system flow, load torque, and curve graphs during the valve group test and the hydraulic motor test. At the same time, the controller 31 outputs control signals to the control box 7 and the test bench frame panel 1 to control the test bench. The lower part of the front end of the controller 31 is provided with several control buttons 33. The control buttons 33 are used to select the test type, including the valve group test or the hydraulic motor test. The control buttons 33 are also used to control the start and stop of the motor. Several control knobs 34 are provided on the right side of the front end of the controller 31, and a safety emergency stop button is provided on the controller 31. The control knobs 34 are used to adjust the flow rate of the system hydraulic oil, select the forward and reverse rotation of the hydraulic motor, and select the phase of the valve group solenoid valve. Since the valve group is connected to the test bench frame panel 1 through the valve group power socket 15, the phase selection of the test valve group is controlled by operating the control knob 34. There are moving brackets 35 at both the left end and the right end of the controller 31. The moving brackets 35 facilitate the movement of the position of the controller 31. The display screen 32 is on the upper part of the control device 3 for easy viewing, and the control part is on the lower part of the control device 3, so that the viewing line of the display screen 32 will not be blocked during the process of selecting button control. The lower end surface of the controller 31 is higher than the upper end surface of the test bench frame tabletop 4, so that the controller 31 does not contact the test bench frame tabletop 4 and does not affect the use of the controller 31.

[0041] The present invention proposes a method for testing hydraulic valves of a heavy water reactor refueling machine, and the method includes:

[0042] Step 1: Place the valve group to be tested on the test bench frame tabletop 4, and connect the valve group to the equipment on the test bench frame panel 1 through a connecting pipe or a connecting wire. Specifically, connect the oil inlet of the valve group to the valve group oil supply port 14 on the test bench, connect the oil outlet of the valve group to the valve group oil return port 16 on the test bench, and connect the solenoid valve power supply interface of the valve group to the valve group power socket 15 on the test bench. Thus, the connection of the valve group is completed.

[0043] Step 2: Adjust the main oil circuit pressure control valve 12 and the control knob 34 to set the pressure and flow rate required for the valve group test. At the same time, the test bench frame body 1 inputs hydraulic oil into the hydraulic valve through the oil tank 8.

[0044] Step 3: The pressure gauge 64 of the valve group circuit, the main oil circuit pressure gauge 63, and the main oil circuit flowmeter 67 respectively measure the pressure value inside the valve group, the pressure value of the test bench test system, and the flow value of the main oil circuit. The measured values are transmitted to the controller 31, and the curves of the flow value and the pressure value (Y-axis) versus time (X-axis) are displayed on the display screen 32. For the pressure regulating valve group, the stability of the pressure regulating valve can be confirmed by observing the change of the outlet pressure curve, or the regulating performance of the valve group within the full pressure range can be judged by checking the regulating screw or knob of the pressure regulating valve. For the flow regulating valve group, it can be judged whether the flow curve is smooth, or the actual adjustable flow range of the flow regulating valve group can be detected.

[0045] In the present invention, by connecting the valve group to the bench, hydraulic oil is supplied to the hydraulic valves of the heavy water reactor refueling machine, and the pressure and flow characteristics of the valves are tested. By reading the curves of the flow and pressure versus time displayed on the display, it is judged whether the valve group is in good condition.

[0046] The present invention provides a test method for a hydraulic motor of a heavy water reactor refueling machine, and the method includes:

[0047] Step 1: Mount the motor to be tested on the motor mounting surface 60 through bolts, and connect the motor head and the torque controller 10 through internal and external gears; connect the oil inlet, oil return port, and oil drain port of the motor to the 3 groups of motor oil port quick connectors 61 through pipelines and connectors respectively; among them, the oil drain port is connected to the uppermost motor oil port quick connector 61 of the 3 groups of motor oil port quick connectors 61.

[0048] Step 2: Adjust the main oil circuit pressure control valve 12 and the control knob 34 to set the pressure and flow required for the motor test. At the same time, the test bench body inputs hydraulic oil into the oil inlet of the motor through the oil tank 8.

[0049] Step 3: Rotate the control knob 34 to select the forward and reverse rotations of the motor, and set the motor load through the torque controller 10.

[0050] Step 4: The motor pressure gauge 62, the motor oil drain flowmeter 68, and the main oil circuit flowmeter 67 respectively measure the oil drain amount, pressure of the motor, and the flow of the main oil circuit of the test system (the flow of the main oil circuit is the flow of the motor). The measured values are transmitted to the controller 31, and the curves of the oil drain amount, flow value, and pressure value (Y-axis) versus time (X-axis) are displayed on the display screen 32. The motor leakage amount is also intuitively displayed through the motor oil drain flowmeter 68, and it can be judged whether the requirement is met by the size of the oil drain amount.

[0051] Step 5: Observe the curve of the oil drain amount to judge whether the motor meets the requirements.

[0052] In the motor test, the present invention mounts the motor on the motor mounting surface on the front of the bench. The motor is controlled to rotate forward and backward by the control device, the load is adjusted by the torque controller, and relevant information such as the flow rate, oil leakage, and pressure during the operation of the hydraulic motor can be displayed in real time on the display screen. Thus, it is convenient to adjust and control the motor test parameters on this bench, improving the practicality of the bench.

[0053] The above embodiments only represent several implementation manners of the present invention, and the description thereof is relatively specific and detailed. However, it should not be construed as a limitation to the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the appended claims.

Claims

1. A hydraulic valve and motor test bench for a heavy water reactor refueling machine, characterized in that, The test bench includes a test bench panel (1), a fixing frame (2), control equipment (3), a test bench surface (4), an oil leakage hole (5) and an oil tank (8). The middle of the upper end of the test bench panel (1) is movably connected to the fixing frame (2), and the lower end of the fixing frame (2) is movably connected to the control equipment (3). In the middle of the front end of the test bench panel (1), there is a test bench surface (4), and the test bench surface (4) is set as a concave structure. A number of the oil leakage holes (5) are embedded in the structure of the test bench surface (4). Below the test bench surface (4), there is the oil tank (8). The oil leakage hole (5) is communicated with the oil tank (8), and the hydraulic oil enters the oil tank (8) through the oil leakage hole (5).

2. The hydraulic valve and motor test bench for the refueling machine of a heavy water reactor according to claim 1, characterized in that, On one side of the test bench panel (1), there is a control box (7), and the control box (7) is used for the input and output of the test bench signals and the control of the actuators. On both sides of the rear end of the test bench panel (1), there are drag doors (17). Inside the drag doors (17), there are motors, oil pumps and pipelines. The oil pump is connected to the motor, and the oil pump is connected to the test bench panel (1) and the oil tank (8) through pipelines. The motor receives the control signal of the control equipment (3), and the motor drives the oil pump to input the hydraulic oil from the oil tank (8) into the hydraulic motor or the valve group. On one side of the test bench panel (1), there is a detachable shutter, and the shutter is used for heat dissipation and ventilation.

3. The hydraulic valve and motor test bench for a heavy water reactor refueling machine according to claim 2, characterized in that, The test bench panel (1) includes a motor test component (6), a torque controller (10), a voltage selection switch (11), a main oil circuit pressure control valve (12), a valve group oil supply port (14), a valve group power socket (15), and a valve group oil return port (16). The motor test component (6) is arranged on the left side of the test bench panel (1), and the motor test component (6) is used for conducting hydraulic motor tests; the torque controller (10) is arranged on the right side of the motor test component (6), and the torque controller (10) is used to provide a load for the hydraulic motor; a voltage selection switch (11) is arranged below the torque controller (10), and a main oil circuit pressure control valve (12) is arranged on the right side of the voltage selection switch (11), and the main oil circuit pressure control valve (12) is used to adjust the maximum pressure of the test bench; 4 groups of the valve group oil supply ports (14) are arranged in the same height on the right side of the torque controller (10), 2 groups of the valve group power sockets (15) are arranged below the valve group oil supply ports, and 4 groups of the valve group oil return ports (16) are arranged below the group of valve group power sockets (15); the connectors of the 4 groups of the valve group oil supply ports have 3 specifications, which are 1 / 2 inch, 3 / 4 inch, and two groups of 3 / 8 inches respectively; the sizes of the 4 groups of the valve group oil return ports (16) correspond to the corresponding valve group oil outlet ports, and the valve group oil supply ports (14) and the valve group oil return ports (16) are used to realize the tests of different types of hydraulic valves; the valve group oil supply ports (14) and the valve group oil return ports (16) are connected to the fuel tank (8). During the hydraulic valve group test, hydraulic oil enters the valve group to be tested from the valve group oil supply port (14), and the hydraulic oil returns to the fuel tank (8) from the valve group to be tested through the valve group oil return port (16).

4. A hydraulic valve and motor test bench for a heavy water reactor refueling machine according to claim 3, characterized in that The voltage selection switch (11) is used for voltage selection during the hydraulic valve group test, and the voltage selection switch (11) can select 120V and 24V; a lighting lamp (13) is arranged at the center of the top of the test bench panel (1).

5. A hydraulic valve and motor test bench for a heavy water reactor refueling machine according to claim 4, characterized in that The motor test component (6) includes a motor mounting surface (60), a motor oil port quick-connect joint (61), a motor pressure gauge (62), a main oil circuit pressure gauge (63), a valve group circuit pressure gauge (64), a power indicator instrument (65), a fuel tank oil temperature gauge (66), a main oil circuit flowmeter (67), and a motor oil leakage flowmeter (68). The motor mounting surface (60) is arranged at the lower part of the left side of the test bench panel (1), and 3 groups of motor oil port quick-connect joints (61) are arranged below the motor mounting surface (60), and the 3 groups of motor oil port quick-connect joints (61) are respectively used for connecting with the oil inlet, oil return, and oil leakage ports of the hydraulic motor; the motor oil leakage flowmeter (68), the main oil circuit flowmeter (67), and the fuel tank oil temperature gauge (66) are arranged side by side above the motor mounting surface (60); the motor pressure gauge (62), the main oil circuit pressure gauge (63), and the valve group circuit pressure gauge (64) are arranged side by side above the motor oil leakage flowmeter (68), the main oil circuit flowmeter (67), and the fuel tank (8) oil temperature gauge respectively.

6. A hydraulic valve and motor test bench for a heavy water reactor refueling machine according to claim 5, characterized in that, The control device (3) includes a controller (31), a display screen (32), control buttons (33), and a control knob (34). The controller (31) is built-in with test bench control software. The controller (31) is electrically connected to the test bench panel (1) and the control box (7). The controller (31) receives the measurement data of the measuring instruments on the test bench panel (1), and the controller (31) transmits control signals to the test bench panel (1) and the control box (7). The display screen (32) is arranged on the upper part of the front end of the controller (31). The display screen (32) displays the parameters of the measuring instruments and the curve graphs of various parameters during the test process. The control buttons (33) are arranged at the lower end of the display screen (32). The control buttons (33) control the start and stop of the motor and select the test type, including valve group or hydraulic motor test, through the controller (31). The control knob (34) is arranged on the right side of the display screen (32). The control knob (34) is used to adjust the flow rate of the system hydraulic oil, control the forward and reverse rotation of the hydraulic motor, and control the phase of the solenoid valves of the valve group.

7. A hydraulic valve and motor test bench for a heavy water reactor refueling machine according to claim 6, characterized in that, The control device (3) is further provided with a moving frame (35) and an emergency stop button. The emergency stop button is arranged on the front end of the controller (31). The moving frame (35) is arranged on both sides of the controller (31). The moving frame (35) controls the movement of the controller (31).

8. A hydraulic valve and motor test bench for a heavy water reactor refueling machine according to claim 7, characterized in that, The lower end surface of the controller (31) is higher than the upper end surface of the test bench surface (4), so that the controller (31) does not contact the test bench surface (4).

9. A method for testing hydraulic valves of a heavy water reactor refueling machine according to claims 1-8, the method comprising: Step 1: Place the valve group to be tested on the test bench surface (4). Connect the oil inlet in the valve group to the oil outlet (14) of the valve group circuit on the test bench through a pipeline, connect the oil outlet in the valve group to the oil return port (16) of the valve group on the test bench, and connect the power supply interface in the valve group to the power socket (15) of the valve group on the test bench. Step 2: Adjust the main oil circuit pressure control valve (12) and the control knob (34) to set the pressure and flow rate required for the valve group test. At the same time, the test bench body inputs hydraulic oil into the hydraulic valves of the valve group through the oil tank (8). Step 3: The pressure gauge (64) of the valve group circuit, the main oil circuit pressure gauge (63), and the main oil circuit flow meter (67) respectively measure the pressure value inside the valve group, the pressure value of the test bench test system, and the flow rate value of the main oil circuit, and transmit the pressure value inside the valve group, the pressure value of the test bench test system, and the flow rate value to the controller (31), and display the curves of the flow rate value vs. time and the pressure value vs. time on the display screen (32). Step 4: Observe the curve to judge the stability of the valve group.

10. A method for testing hydraulic valves of a heavy water reactor refueling machine according to claims 1-8, the method comprising: Step 1: Mount the motor under test on the motor mounting surface (60) by bolts. Connect the motor head of the motor under test to the torque controller (10) through internal and external gears. Connect the oil inlet, oil return port, and oil drain port of the motor to the 3 groups of motor oil port quick connectors (61) respectively through pipelines and connectors. Step 2: Adjust the main oil circuit pressure control valve (12) and the control knob (34) to set the pressure and flow rate required for the motor test. At the same time, the test bench body inputs hydraulic oil into the oil inlet of the motor through the oil tank (8). Step 3: Rotate the control knob (34) to select the forward and reverse rotation of the motor, and set the motor load on the torque controller (10). Step 4: The motor pressure gauge (62), the motor oil drain flow meter (68), and the main oil circuit flow meter (67) measure the pressure of the motor, the oil drain volume, and the flow rate of the main oil circuit of the test system respectively, and transmit the oil drain volume, pressure of the motor, and the flow rate of the main oil circuit of the test system to the controller (31), and display the curves of the oil drain volume, flow rate value, and pressure value versus time on the display screen (32). Step 5: Observe the curve of the oil drain volume to determine whether the motor meets the requirements.

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