Digital fixed control device suitable for oil quantity of air compressor and liquid level of windshield wiper water tank of urban railway vehicle

Abstract

The utility model relates to a digital fixed control device suitable for the oil quantity of an air compressor and the liquid level of a windshield wiper water tank of an urban railway vehicle, which comprises a high-density flow controller, a low-density flow controller, a first contactor, a second contactor, a high-density flowmeter, a low-density flowmeter, a first normally-closed electromagnetic valve, a second normally-closed electromagnetic valve, a first pump, a second pump and a first one-way valve, a second one-way valve, a DC24V battery pack, an electric quantity remaining percentage display screen and a standby external power interface. The digital fixed control device suitable for the oil quantity of the air compressor and the liquid level of the windshield wiper water tank of the urban railway vehicle is a portable device which is high in practicability and functionality in the new vehicle stage, the after-sales stage and the maintenance stage of the urban railway vehicle, labor intensity is reduced, a large amount of production and maintenance time is saved, and the working efficiency is improved. The problems of leakage, filling, drainage and maintenance of high-density and low-density liquid of the urban railway vehicle are thoroughly solved, the completeness of the vehicle is ensured, the economic loss caused by liquid loss is directly reduced, and wide practicability is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of brake testing of urban railway vehicles, in particular to a digital fixed-control device for the oil level of an air compressor and the liquid level of a wiper water tank of an urban railway vehicle. Background Art

[0002] During brake testing on urban rail vehicles, the air compressor must first be filled with oil, and the oil filling port is always oriented horizontally. A single urban rail train requires at least two air compressors. The fluid level during filling is not precise, making it difficult to control the amount of oil in the air compressor. Repeated pouring from the oil container during filling can cause spills at the work site, polluting the work environment and requiring manual cleaning. This directly results in oil loss, requiring numerous vehicle commissionings each year, resulting in significant economic losses and the use of significant manpower and material resources. Since the water tank is typically located below the driver's station, leakage can leak onto the driver's station or wiring harness during filling, compromising the vehicle's electrical insulation and even causing electrical leakage, burning out electrical components. The design location of the water tank varies depending on the client's requirements, and some locations cannot be filled using standard methods, making testing impossible. Utility Model Content

[0003] The utility model aims to solve the technical problems in the prior art and provides a digital fixed-control device for the oil level of an air compressor and the liquid level of a wiper water tank in an urban railway vehicle.

[0004] In order to solve the above technical problems, the technical solutions of the present utility model are as follows:

[0005] A digital fixed-control device for the oil level of an air compressor and the liquid level of a wiper tank for an urban railway vehicle, comprising: a high-density flow controller, a low-density flow controller, a first contactor, a second contactor, a high-density flow meter, a low-density flow meter, a first solenoid valve, a second solenoid valve, a first pump, a second pump, a first check valve, a second check valve, a DC24V battery pack, a remaining power percentage display, and a backup external power supply interface;

[0006] The high-density flow controller is connected to the device through the first contactor and the first pump in sequence; the liquid is connected to the device through the first solenoid valve, the high-density flow meter, and the first pump in sequence; the high-density flow controller is also connected to the high-density flow meter, the first solenoid valve, and the DC24V battery pack respectively; the liquid is also connected to the first pump through the first one-way valve;

[0007] The low-density flow controller is connected to the device through the second contactor and the second pump in sequence; the liquid is also connected to the device through the second solenoid valve, the low-density flow meter, and the second pump in sequence; the low-density flow controller is also connected to the low-density flow meter, the second solenoid valve, and the DC24V battery pack respectively; the liquid is also connected to the second pump through the second one-way valve;

[0008] The DC24V battery pack is also connected to the backup external power interface and the remaining power percentage display screen respectively.

[0009] In the above technical solution, when the liquid is air compressor oil, it is connected to the low-density flow controller; when the liquid is water tank liquid, it is connected to the high-density flow controller.

[0010] In the above technical solution, an emergency stop mushroom button is also provided, which is used to control the high-density flow controller and the low-density flow controller to stop working.

[0011] In the above technical solution, a liquid hose interface is also provided, and the liquid hose interface is a quick-plug interface.

[0012] In the above technical solution, the battery remaining power percentage display screen directly displays the battery remaining power percentage after the power switch button is pressed.

[0013] In the above technical solution, the backup external power supply interface is an AC220V external power supply interface, which is used to rectify AC220V into DC24V to prevent the DC24V battery pack from running out of power and being unable to work.

[0014] In the above technical solution, the first one-way valve and the second one-way valve are respectively quick injection and discharge one-way valves for preventing liquid backflow.

[0015] The utility model has the following beneficial effects:

[0016] The utility model is suitable for the digital fixed control device of the oil quantity of the air compressor and the liquid level of the wiper water tank of the urban railway vehicle. It is highly practical and functional in the new vehicle stage, after-sales stage and maintenance stage of the urban railway vehicle. It is a portable device that reduces labor intensity and saves a lot of production and maintenance time. It completely solves the problems of leakage, filling, drainage and maintenance of high and low density liquids in the urban railway vehicle, ensures the integrity of the vehicle, directly reduces the economic loss of liquid loss, and has wide practicality.

[0017] The utility model is applicable to the digital fixed control device for the oil quantity of the air compressor and the liquid level of the wiper water tank of the urban railway vehicle. It is a universal device for urban railway vehicles and is easy to operate and can be operated by a single person. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be described in further detail below with reference to the accompanying drawings and specific implementation methods.

[0019] Figure 1 The utility model is a structural schematic diagram of a digital fixed control device for the oil level of an air compressor and a liquid level of a wiper water tank applicable to urban railway vehicles.

[0020] The reference numerals in the figures indicate:

[0021] 11-high-density flow controller; 21-first contactor; 31-high-density flow meter; 41-first solenoid valve;

[0022] 12- low-density flow controller; 22- second contactor; 32- low-density flow meter; 42- second solenoid valve;

[0023] 51-first one-way valve; 52-second one-way valve; 6-DC24V battery pack; 7-display screen indicating the remaining battery percentage; 8-backup external power supply interface. DETAILED DESCRIPTION

[0024] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "center," "up," "down," "left," "right," "vertical," "horizontal," "inside," and "outside" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for the purpose of facilitating the description of the present invention and simplifying the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The present invention will be further described below in conjunction with the accompanying drawings.

[0026] This utility model is suitable for digitally controlling the oil level in urban rail train air compressors and the wiper tank. It includes a flow controller, a flow meter, a solenoid valve (normally closed liquid solenoid valve), a water pump, an oil pump, four quick-connect connectors and hoses, a one-way valve, a contactor (DC contactor), and a DC24V battery pack. The device also includes an AV220V rectifier and a DC24V backup external power supply. The flow controller has an inner diameter of 6.9mm, a liquid flow rate of approximately 0.9-7L / min, an output pulse frequency (Hz) of 138*Q] + 3% (Q is the flow rate in L / min), or 2280 pulses per liter of water. The insulation resistance is greater than 200MΩ, and the output pulse duty cycle is 50±10%.

[0027] The device uses two flow meters: a low-density flow meter and a high-density flow meter.

[0028] The air compressor oil is an oval gear flowmeter for low-density flow. It consists of a pair of oval gears and upper and lower covers to form a sealed crescent-shaped cavity (which is not sealed due to the rotation of the gears) as the calculation unit for one-time displacement. When the measured liquid enters the flowmeter through the pipeline, the pressure difference generated at the inlet and outlet drives a pair of gears to rotate continuously, and the liquid measured by the crescent-shaped cavity is continuously transported to the outlet. The product of the rotation speed of the oval gears and four times the displacement per time is the total amount of the measured liquid flow. The flowmeter mainly consists of a housing, a counter, oval gears, a coupling, etc. Under the action of the pressure difference △P = P1 - P2 of the measured medium, the oval gears generate a torque to make them rotate. Since P1 > P2, the resultant torque generated under the action of P1 and P2 makes the wheel rotate clockwise, discharging the medium in the semi-circular volume between the wheel and the housing to the outlet, and driving the other wheel to rotate counterclockwise. At this time, the driving wheel drives the driven wheel to act. Since P1 < P2, the resultant torque generated under the action of P1 and P2 makes the wheel rotate clockwise. At this time, the driven wheel drives the driving wheel to act. In this way, the two wheels alternately drive each other to rotate, and the measured medium is discharged from the inlet to the outlet in units of the semi-circular volume one by one. The display of the flow signal of the oval gear flowmeter is mainly achieved by the gears after deceleration driving a magnet to rotate, making the contacts of the spring relay close or disconnect synchronously at the same rotation frequency as the magnet, thereby sending out electrical pulses to a remote display instrument.

[0029] The liquid in the water tank is an electromagnetic flowmeter for high-density flow. The electromagnetic flowmeter is based on Faraday's law of electromagnetic induction. In measuring the water flow, the conductive medium in the measuring tube is equivalent to the conductive metal rod in Faraday's experiment, and two electromagnetic coils at the upper and lower ends generate a constant magnetic field. When a conductive medium flows through, an induced voltage will be generated. Two electrodes inside the pipeline measure the generated induced voltage. The measuring pipeline is electromagnetically isolated from the fluid and the measuring electrodes through a non-conductive lining. When a conductive fluid flows through a magnetic field perpendicular to the flow direction, the conductive liquid induces an induced voltage E proportional to the average flow velocity. The induced voltage is detected by two electrodes directly in contact with the fluid, and after being amplified, filtered, and shaped by the converter, the display and output control of the instantaneous flow and cumulative flow are completed. E = KBVD where: E---induced voltage, K---instrument constant, B---magnetic induction intensity, V---average flow velocity in the measuring tube surface, D---diameter of the flowmeter.

[0030] The normally closed liquid solenoid valve is a secondary opening solenoid valve. Its structure primarily consists of a pilot valve and a main valve, with the main valve utilizing a rubber seal. In the normal position, the movable core seals the pilot valve port, balancing the pressure within the valve chamber and closing the main valve port. When the coil is energized, electromagnetic force pulls the movable core upward, causing the medium within the main valve chamber to escape through the pilot valve port. This creates a pressure differential, rapidly lifting the diaphragm or valve cup, opening the main valve port and allowing the valve to flow through. When the coil is de-energized, the magnetic field disappears, causing the movable core to return to its original position, sealing the pilot valve port. Once the pressure within the pilot valve and main valve chambers equalizes, the valve returns to the closed position. The top of the schematic diagram shows the high-density liquid operation panel. The bottom shows the low-density liquid operation panel. High-density and low-density flow controllers are used to control the quantitative liquid output. This device allows for rapid and complete liquid filling and discharge, resolving issues such as difficulty filling and subsequent liquid discharge due to the orientation of the oil fill port. This device is commonly used in high- and low-density systems on urban rail vehicles.

[0031] The digital fixed control device for oil level of air compressor and liquid level of wiper water tank of urban railway vehicle of the present invention is further described in detail below with reference to the accompanying drawings.

[0032] The utility model is applicable to the digital fixed control device of the oil level of the air compressor of the urban railway vehicle and the liquid level of the wiper water tank. Figure 1 As shown, it includes: a high-density flow controller 11, a low-density flow controller 12, a first contactor 21, a second contactor 22, a high-density flowmeter 31, a low-density flowmeter 32, a first solenoid valve 41, a second solenoid valve 42, a first pump, a second pump, a first one-way valve 51, a second one-way valve 52, a DC24V battery pack 6, a remaining power percentage display screen 7 and a backup external power supply interface 8.

[0033] The high-density flow controller 11 is connected to the device through the first contactor 21 and the first pump in sequence; the liquid is connected to the device through the first solenoid valve 41, the high-density flow meter 31, and the first pump in sequence; the high-density flow controller 11 is also connected to the high-density flow meter 31, the first solenoid valve 41, and the DC24V battery pack 6 respectively; the liquid is also connected to the first pump through the first one-way valve 51;

[0034] The low-density flow controller 12 is connected to the device through the second contactor 22 and the second pump in sequence; the liquid is also connected to the device through the second solenoid valve 42, the low-density flow meter 32, and the second pump in sequence; the low-density flow controller 12 is also connected to the low-density flow meter 32, the second solenoid valve 42, and the DC24V battery pack 6 respectively; the liquid is also connected to the second pump through the second one-way valve 52;

[0035] The DC24V battery pack 6 is also connected to a backup external power supply interface 8 and a remaining power percentage display screen 7 respectively.

[0036] The utility model is suitable for the digital fixed control device of the air compressor oil quantity and the wiper water tank liquid level of the urban railway vehicle. When the liquid is the air compressor oil, it is connected to the low-density flow controller 12; when the liquid is the water tank liquid, it is connected to the high-density flow controller 11, and the liquid quantitative output is operated by the high-density flow controller 11 and the low-density flow controller 12.

[0037] The utility model is applicable to the digital fixed control device of the oil level of the air compressor of the urban railway vehicle and the liquid level of the wiper water tank, and is provided with an emergency stop mushroom button, which is a stop button for controlling all devices of the high-density flow controller 11 and the low-density flow controller 12.

[0038] The utility model is applicable to the digital fixed control device for the oil level of the air compressor and the liquid level of the wiper water tank of the urban railway vehicle. The battery remaining power percentage display screen 7 directly displays the battery remaining power percentage after the power switch button is pressed, and can be operated without an external power supply.

[0039] The utility model is applicable to the digital fixed control device of the oil level of the air compressor and the liquid level of the wiper water tank of the urban railway vehicle. The DC24V battery pack 6 can be charged and recycled. The battery power percentage display function is added through the remaining power percentage display screen 7 to provide a pre-charging reminder.

[0040] The utility model is suitable for the digital fixed control device of the oil level of the air compressor and the liquid level of the wiper water tank of the urban railway vehicle, and is provided with a spare external power supply interface 8, which is used to rectify AC220V to DC24V to prevent the DC24V battery pack 6 from running out of power and unable to work.

[0041] The liquid hose interface of the utility model, which is suitable for the digital fixed control device of the oil quantity of the air compressor and the liquid level of the wiper tank of the urban railway vehicle, is a quick-plug interface; the spare external power supply interface 8 is an AC220V external power supply interface; the first one-way valve 51 and the second one-way valve 52 are respectively quick injection and discharge one-way valves used to prevent liquid backflow.

[0042] The working process of the digital fixed control device for oil level of air compressor and liquid level of wiper water tank of urban railway vehicle is as follows:

[0043] The power switch knob is turned to the on position, the power indicator light is red, the knob is turned to automatic mode, and the start button on the panel of the high-density flow controller 11 is pressed. The first pump and the first solenoid valve 41 are opened at the same time, the running indicator light of the high-density flow controller 11 is green, and the liquid flows through the high-density flow meter 31. The high-density flow meter 31 transmits the signal to the high-density flow controller 11, and a first one-way valve 51 for rapid injection and discharge is added to the pipeline. The first one-way valve 51 is used to prevent liquid backflow; when the set value is reached, the high-density flow controller 11 cuts off the power supply of the first contactor 21 and the first solenoid valve 41, and the first pump; the first solenoid valve 41 is closed, and one-time quantitative completion is completed.

[0044] The power switch knob is turned to the on position, the power indicator light is red, and the start button on the panel of the low-density flow controller 12 is pressed. The second pump and the second solenoid valve 42 are opened at the same time, the running indicator light of the low-density flow controller 12 is green, and the liquid flows through the low-density flow meter 32. The low-density flow meter 32 transmits the signal to the low-density flow controller 12, and a second one-way valve 52 for rapid injection and discharge is added to the pipeline. The second one-way valve 52 is used to prevent liquid backflow; when the set value is reached, the low-density flow controller 12 cuts off the power supply of the second contactor 22 and the second solenoid valve 42, and the second pump; the second solenoid valve 42 is closed, and one-time quantitative completion is completed.

[0045] The utility model is suitable for the digital fixed control device of the oil quantity of the air compressor and the liquid level of the wiper water tank of the urban railway vehicle, and has quantitative and non-quantitative suction and discharge. When the knob is turned to the manual mode and the high-density manual button is pressed, the non-quantitative rapid suction and discharge function of the high-density liquid is started; when the low-density manual button is pressed, the non-quantitative rapid suction and discharge function of the low-density liquid is started.

[0046] The utility model is suitable for the digital fixed control device of the oil amount of the air compressor and the liquid level of the wiper water tank of the urban railway vehicle. It can quickly absorb and discharge the liquid inside the equipment during subsequent production and maintenance of the equipment. It is generally applicable to high and low density devices in urban railway vehicles.

[0047] The utility model is suitable for the digital fixed control device of the oil quantity of the air compressor and the liquid level of the wiper water tank of the urban railway vehicle. It is highly practical and functional in the new vehicle stage, after-sales stage and maintenance stage of the urban railway vehicle. It is a portable device that reduces labor intensity and saves a lot of production and maintenance time. It completely solves the problems of leakage, filling, drainage and maintenance of high and low density liquids in the urban railway vehicle, ensures the integrity of the vehicle, directly reduces the economic loss of liquid loss, and has wide practicality.

[0048] The utility model is applicable to the digital fixed control device for the oil quantity of the air compressor and the liquid level of the wiper water tank of the urban railway vehicle. It is a universal device for urban railway vehicles and is easy to operate and can be operated by a single person.

[0049] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A digital fixed control device for the oil level of the air compressor and the liquid level of the wiper tank of a city railway vehicle, characterized in that: include: A high-density flow controller (11), a low-density flow controller (12), a first contactor (21), a second contactor (22), a high-density flow meter (31), a low-density flow meter (32), a first solenoid valve (41), a second solenoid valve (42), a first pump, a second pump, a first one-way valve (51), a second one-way valve (52), a DC24V battery pack (6), a remaining power percentage display screen (7), and a backup external power supply interface (8); The high-density flow controller (11) is connected to the device through the first contactor (21) and the first pump in sequence; the liquid is connected to the device through the first solenoid valve (41), the high-density flow meter (31), and the first pump in sequence; the high-density flow controller (11) is also connected to the high-density flow meter (31), the first solenoid valve (41), and the DC24V battery pack (6) respectively; the liquid is also connected to the first pump through the first one-way valve (51); The low-density flow controller (12) is connected to the device through the second contactor (22) and the second pump in sequence; the liquid is also connected to the device through the second solenoid valve (42), the low-density flow meter (32), and the second pump in sequence; the low-density flow controller (12) is also connected to the low-density flow meter (32), the second solenoid valve (42), and the DC24V battery pack (6) respectively; the liquid is also connected to the second pump through the second one-way valve (52); The DC24V battery pack (6) is also connected to the backup external power interface (8) and the remaining power percentage display screen (7) respectively.

2. The digital fixed control device for oil level of air compressor and liquid level of wiper water tank applicable to urban railway vehicles according to claim 1 is characterized in that: When the liquid is air compressor oil, it is connected to the low-density flow controller (12); when the liquid is water tank liquid, it is connected to the high-density flow controller (11).

3. The digital fixed control device for oil level of air compressor and liquid level of wiper tank applicable to urban railway vehicles according to claim 1 is characterized in that: An emergency stop mushroom button is also provided, and the emergency stop mushroom button is used to control the high-density flow controller (11) and the low-density flow controller (12) to stop working.

4. The digital fixed control device for oil level of air compressor and liquid level of wiper tank applicable to urban railway vehicles according to claim 1 is characterized in that: A liquid hose interface is also provided, which is a quick-plug interface.

5. The digital fixed control device for oil level of air compressor and liquid level of wiper tank applicable to urban railway vehicles according to claim 1 is characterized in that: The battery remaining power percentage display (7) directly displays the battery remaining power percentage after the power switch button is pressed.

6. The digital fixed control device for oil level of air compressor and liquid level of wiper tank applicable to urban railway vehicles according to claim 1 is characterized in that: The standby external power interface (8) is an AC220V external power interface, which is used to rectify AC220V into DC24V to prevent the DC24V battery pack (6) from running out of power and being unable to work.

7. The digital fixed control device for oil level of air compressor and liquid level of wiper tank applicable to urban railway vehicles according to claim 1 is characterized in that: The first one-way valve (51) and the second one-way valve (52) are respectively quick injection and discharge one-way valves for preventing liquid backflow.

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