Closed pipeline liquid adding vehicle

Abstract

A closed pipeline liquid adding vehicle comprises a vehicle overall frame, a control cabinet, a water injection tank, a waste liquid tank, a liquid adding flow meter, a liquid discharging flow meter, a liquid adding pump and a liquid discharging pump. The system is high in leakproofness, safe and environment-friendly; a fully-closed pipeline system is adopted, liquid leakage, volatilization and pollution risks do not exist in the liquid adding process, and the safety of operators and the environment-friendly operation requirement are guaranteed; the liquid level monitoring module, the flow monitoring module and the digital display module are integrated, flow recording is achieved, and control precision and operation convenience are improved; the whole vehicle is designed to be miniaturized and is provided with rollers, a quick connector and a hose storage device, a single person can independently complete connection and operation, and the requirements for on-site flexible transfer and high-frequency use are met; the filling operation has a data recording function, the single filling amount is automatically recorded, process statistics and operation and maintenance file reserving are facilitated, and the requirements of a quality management system are met.

Description

Technical Field

[0001] This invention relates to auxiliary equipment for rail vehicles, and more particularly to a closed-pipeline liquid filling vehicle. Background Technology

[0002] The demand for liquid filling in rail transit, industrial equipment, and special vehicles is increasing, especially for functional liquids such as coolant, brake fluid, and cleaning fluid. This requires filling equipment to have higher levels of airtightness, safety, and efficiency. Currently, most commonly used filling methods are open-top or semi-closed filling, which have problems such as volatile pollution, liquid waste, and cumbersome operation. These not only affect the working environment but also pose potential threats to personnel health and equipment safety. Especially when filling operations are carried out in depots or enclosed compartments, the filling equipment has high requirements for pressure control, liquid volume monitoring, and joint sealing. Existing equipment often struggles to achieve a balance between airtightness, convenience, and adaptability, resulting in technical limitations. Summary of the Invention

[0003] The purpose of this invention is to solve the problems of poor sealing, easy leakage, cumbersome operation, and inaccurate filling of existing liquid filling equipment, and to achieve efficient, safe and environmentally friendly filling of various liquids. It is suitable for daily maintenance operations of rail transit vehicles and other special equipment in workshops, stations and other scenarios.

[0004] To achieve the above objectives, the present invention provides a closed-loop liquid filling vehicle, including an overall vehicle frame, a control cabinet, a water filling tank, a waste liquid tank, a liquid filling flow meter, a liquid draining flow meter, a liquid filling pump, and a liquid draining pump;

[0005] The overall frame of the trolley includes a handrail, a wall-mounted connector, a back panel, a waste liquid tank mounting bracket, a chassis, a liquid filling pump mounting bracket, a liquid draining pump mounting bracket, a caster mounting plate, a terminal block, a wire trough, an electrical guide rail, and a side panel. The water filling tank is fixed to the chassis with bolts, with the water inlet facing upwards and the outlet facing downwards. The waste liquid tank is installed inside the waste liquid tank mounting bracket, which is fixed to the back panel by welding or screwing. The liquid filling pump and the liquid draining pump are respectively installed on the liquid filling pump mounting bracket and the liquid draining pump mounting bracket, which are screwed into preset holes on the base plate. The liquid filling pump and the liquid draining pump are respectively connected to the liquid filling hose and the liquid draining hose, which are fixed to the chassis by pipe hooks.

[0006] Furthermore, the control cabinet is bolted to the chassis and welded or screwed to the handrail with reinforcing ribs. The control cabinet includes a cabinet body, a panel, and a cabinet door. The panel is equipped with a color LCD HMI touch screen, status indicator lights, buttons, and an emergency stop switch. The cabinet is equipped with a PLC control unit. The signal lines and power lines of the PLC control unit are uniformly connected to the components through terminal blocks and are laid in cable trays.

[0007] Furthermore, the PLC control unit is connected to a 12V DC power supply via terminals 1-4, the input lines of the control relay are connected to terminals 5-9, the output lines of the control relay are connected to terminals 10-11, and the closed contacts of the control circuit are connected. Terminals 12-13 are reserved ports, terminals 14-15 are connected to the liquid adding pump, terminals 16-17 are connected to the liquid discharging pump, and terminals 18-20 are connected to the input signal terminal of the liquid level sensor. The signal lines of the liquid adding flow meter and the liquid discharging flow meter are directly connected to the high-speed input terminals X04 and X05 of the PLC control unit. The data of the liquid adding and discharging volumes output by the flow meters are transmitted to the PLC for data recording.

[0008] Furthermore, the liquid filling flow meter is located between the water injection tank and the liquid filling pump, and the liquid draining flow meter is located between the drain outlet of the water replenishment circuit of the work object and the waste liquid tank. A draining pump is installed between the waste liquid tank and the external container. Liquid replenishment is manually added to the water injection tank. After clicking the start button, the liquid filling pump operates, and the liquid flows through the injection pipeline via:

[0009] Water tank → F1 liquid flow meter → liquid pump → liquid replenishment circuit liquid inlet for liquid replenishment operation;

[0010] When the water replenishment circuit is full, excess replenishment liquid will automatically flow out of the outlet of the water replenishment circuit, and the waste liquid will flow through the waste liquid pipeline via:

[0011] Water supply circuit drain outlet → F2 drain flow meter → waste liquid tank;

[0012] After the waste liquid tank is filled to the designated level, the filling pump stops and the draining pump starts to empty the waste liquid tank and discharge the waste liquid to an external container, thus completing the filling process.

[0013] The F1 liquid inlet flow meter records the amount of liquid added to the water supply circuit, and the F2 liquid outlet flow meter records the amount of liquid discharged from the water supply circuit. After the data from both are transmitted to the PLC controller, the total amount of liquid added is automatically calculated and recorded.

[0014] Furthermore, the external container is located inside the external container mounting bracket, which is fixedly installed on the outside of the control cabinet.

[0015] Furthermore, the water tank has a volume of not less than 60 liters, and the waste liquid tank has a volume of not less than 5 liters. The water tank and the waste liquid tank are respectively equipped with scale markings and liquid level display windows.

[0016] Furthermore, the water tank outlet is equipped with a filter, a filling pipe connected to the filling gun, a male and female quick connector, and a return pipe for waste liquid recovery.

[0017] Furthermore, a liquid level sensor is installed inside the waste liquid tank, and the liquid level sensor feeds back the signal to the PLC for controlling the stop of liquid addition and triggering an alarm.

[0018] Furthermore, all filling and draining hoses are equipped with airtight quick-connect fittings at their ends for easy connection and disconnection from vehicle interfaces.

[0019] Furthermore, the pipe interface is equipped with an embedded sealing ring and a snap-fit ​​positioning structure to ensure that there is no leakage or loosening during insertion and removal.

[0020] Furthermore, the caster mounting plate is used to fix and install swivel casters.

[0021] Advantages and advancements of this invention compared to existing technologies:

[0022] (1) The system is highly airtight and safe and environmentally friendly.

[0023] The system employs a fully enclosed pipeline system, eliminating the risk of liquid leakage, evaporation, and pollution during the liquid addition process, thus ensuring the safety of operators and meeting environmental protection requirements.

[0024] (2) Intelligent and controllable filling process

[0025] It integrates liquid level monitoring, flow monitoring and digital display modules, and has flow recording capabilities, improving control accuracy and ease of operation.

[0026] (3) The equipment is highly convenient to operate.

[0027] The vehicle features a compact design with rollers, quick connectors, and hose storage, allowing a single person to independently complete the connection and operation, meeting the needs for flexible on-site deployment and high-frequency use.

[0028] (4) The entire operation process is traceable and documented.

[0029] The filling operation has a data recording function, which automatically records the filling volume of each operation, facilitating process statistics and maintenance documentation, and meeting the requirements of the quality management system. Attached Figure Description

[0030] Figure 1 This is the main view of the overall frame of the vehicle;

[0031] Figure 2 This is a top view of the overall frame of the vehicle;

[0032] Figure 3 This is a bottom view of the overall frame of the vehicle;

[0033] Figure 4 This is a schematic diagram of the internal structure of the overall frame of the vehicle;

[0034] Figure 5 Schematic diagram of caster mounting plate structure;

[0035] Figure 6 Terminal wiring diagram;

[0036] Figure 7 This is a schematic diagram of the control cabinet;

[0037] Figure 8 This is a schematic diagram of the electronic control system.

[0038] Figure 9 This is a diagram showing the direction of liquid flow.

[0039] In the diagram: 1. Handrail; 2. Through-wall connector; 3. Back panel; 4. Waste liquid tank mounting bracket; 5. Chassis; 6. Drain pump mounting bracket; 7. Caster mounting plate; 8. Filling pump mounting bracket; 9. Terminal block; 10. Cable tray; 11. Electrical rail; 12. Side panel; 13. Cabinet; 14. Cabinet door; 15. Panel; 16. External container mounting bracket. Detailed Implementation

[0040] The closed-loop liquid filling vehicle of the present invention is mounted on an integrated mobile chassis 5. The closed-loop liquid filling vehicle of the present invention consists of three main modules: device assembly, control assembly and pipeline assembly. The modules are integrated by means of structural fixation, cable connection and hose coupling to achieve overall coordinated operation.

[0041] I. Its composition is explained as follows:

[0042] (1) Device assembly module

[0043] Used to support and bear the various functional components, enabling the installation of the overall structure and its ground movement. (Refer to...) Figures 1 to 5 The main components include the overall frame of the trolley, which includes a handrail 1, a wall-mounted connector 2, a back plate 3, a waste liquid tank mounting bracket 4, a chassis 5, a liquid filling pump mounting bracket 8, a liquid draining pump mounting bracket 6, a caster mounting plate 7, a terminal block 9, a wire trough 10, an electrical guide rail 11, and a side plate 12.

[0044] (2) Control Assembly Module

[0045] Used for human-computer interaction, electrical control, liquid filling management, and equipment power supply.

[0046] The main components include a control cabinet, which includes a cabinet body 13, a panel 15, and a cabinet door 14. The panel 15 is equipped with a color LCD HMI touch screen (integrated PLC), status indicator lights (run, alarm, liquid filling), buttons, and an emergency stop switch (red mushroom head). The cabinet is equipped with a PLC control unit. The signal lines and power lines of the PLC control unit are connected to the components through a terminal block 9.

[0047] (3) Piping assembly module

[0048] This is the core functional module of the equipment, used for the closed-loop transport, filling, recovery, and measurement of liquids.

[0049] The main components include a water tank (60L high-strength plastic), a waste liquid tank (≥5L, with a liquid level sensor), an external container mounting bracket 16, a liquid filling hose, a liquid draining hose, two flow meters (F1: liquid filling flow meter; F2: liquid draining flow meter), and two fluid pumps (liquid filling pump P1; liquid draining pump P2).

[0050] II. The connection relationships between each module are explained below:

[0051] Connection between the device assembly and the piping assembly:

[0052] The water tank is connected to the chassis 5. The water tank is placed directly at the designated position on the chassis 5 and fixed to the chassis 5 with bolts. The water tank's inlet faces upward and the outlet faces downward to facilitate gravity drainage.

[0053] The waste liquid tank is installed in the waste liquid tank mounting frame, which is fixed to the back plate 3 by welding or screwing to ensure seismic stability.

[0054] The liquid filling pump P1 and the liquid draining pump P2 are respectively installed on the liquid filling pump mounting bracket 8 and the liquid draining pump mounting bracket 6. The liquid filling pump mounting bracket 8 and the liquid draining pump mounting bracket 6 are screwed to the preset holes in the chassis 5 to ensure convenient maintenance.

[0055] The filling hose and drain hose are connected to the filling pump and drain pump respectively, and are fixed to the chassis by the pipe hooks to keep them clean and avoid dragging or tangling.

[0056] The bottom of the control cabinet is connected to the chassis 5 structure by 4 bolts, and is welded or screwed to the handrail 1 frame by reinforcing ribs to form the overall structural stability.

[0057] Reference Figure 6 The PLC control unit inside the control cabinet is connected to the liquid adding pump, liquid discharging pump, solenoid valve, liquid level sensor and flow meter via cables;

[0058] All signal and power lines are connected to the terminal block 9 and laid in the chassis cable tray 10 or conduit.

[0059] The wiring is explained below:

[0060] The control system of this device is powered by 12V DC. The control system includes a display screen for displaying liquid addition information, operation buttons for controlling start and stop, an emergency stop switch for power failure in case of emergency, and a data recording module for recording the amount of liquid added.

[0061] Standard terminal blocks (9-pair) are used for centralized wiring of peripheral components such as buttons, sensors, and electric pumps. The control core is a PLC control unit, with some signal lines directly connected to the PLC control unit. The wiring structure is clear and reasonable, and the wiring relationships of each component are as follows:

[0062] (1) Terminal block 9

[0063] The control cabinet is equipped with crimp-type strip terminal blocks. The interface numbers and functions are shown in Wiring Table 1 below:

[0064]

[0065]

[0066] Table 1

[0067] (2) PLC and flow meter wiring:

[0068] PLC Model: MM-24MR-12MT-500-FX-A

[0069] Flow meter model: OF05ZAT

[0070] The PLC control unit is connected to a 12V DC power supply through terminals 1-4 (see Wiring Table 1), meaning that the PLC obtains a stable power supply from the system's main power supply.

[0071] The liquid inlet flow meter (F1) and liquid outlet flow meter (F2) do not pass through terminal block 9; their signal lines are directly connected to the input port of the PLC control unit to achieve high-speed counting or pulse acquisition. The connection method is as follows:

[0072] The flow meter's signal line (pulse output) is directly connected to the high-speed input terminal of the PLC (X04 and X05 of the PLC control all-in-one machine wiring);

[0073] Power is supplied by a branch of the main power supply, using 12V, and connected via a dedicated line;

[0074] Each flow meter is equipped with independent signal and power lines, physically separated from the actuator circuitry to avoid interference. The flow meter outputs liquid addition and discharge volume data to the PLC control unit for data recording.

[0075] Reference Figures 7 to 8The circuit principle is explained as follows: It mainly controls the operation of two pumps (addition pump and discharge pump), and works with the liquid level sensor and indicator lights to make logical judgments and output actions. Key components are described in Table 2:

[0076]

[0077]

[0078] Table 2

[0079] Circuit logic flow description:

[0080] Startup process:

[0081] ① Liquid addition control (P1 liquid addition pump control)

[0082] 1. When the operator presses the start button (SB1), the power is turned on, and the control relay KA1 is energized and engaged;

[0083] 2. When the normally open contact of KA1 closes, it drives the P1 liquid pump to start, realizing the liquid addition operation, and at the same time illuminates the liquid addition indicator (HG);

[0084] 3. Monitor the status of the waste liquid tank in real time during the liquid addition process;

[0085] 4. If the liquid level has not reached the upper limit, the normally closed contact of SQ remains closed, and liquid addition continues;

[0086] 5. Once the waste liquid tank level reaches the set upper limit, the normally closed contact of SQ opens, KA1 loses power, the liquid pump stops, and the liquid addition automatically terminates.

[0087] ② Drainage control (P2 drainage pump control)

[0088] 1. When the waste liquid tank reaches the set upper limit, the normally open contact of SQ closes, triggering KA2;

[0089] 2. When KA2 is triggered (indicating that the liquid filling station / conditions have been confirmed), the contact closes;

[0090] 3. KA2 triggers the time-delay relay KT to engage, and KT starts the timing;

[0091] 4. During the KT delay time, its normally open contact closes, the drainage pump is energized and starts the drainage process;

[0092] 5. After the KT delay ends, its contacts open, the drain pump stops, and one draining action is completed;

[0093] 6. The entire drainage logic is jointly completed by "KA2+KT delay control" to ensure that the drainage process is timed, automatic and requires no human intervention.

[0094] Reference Figure 9 Equipment operating mode:

[0095] The replenishing fluid is manually added to the water tank. After clicking the start button, the filling pump is activated, and the fluid flows through the filling pipeline via:

[0096] Water tank → F1 liquid flow meter → liquid pump → liquid replenishment circuit liquid inlet for liquid replenishment operation.

[0097] When the water replenishment circuit is full, excess replenishment liquid will automatically flow out of the outlet of the water replenishment circuit, and the waste liquid will flow through the waste liquid pipeline via:

[0098] Water supply circuit drain outlet → F2 drain flow meter → waste liquid tank;

[0099] After the waste liquid tank collects waste liquid to the designated level, the liquid addition pump stops and the liquid discharge pump starts to empty the waste liquid tank, and the waste liquid is discharged to the external container, thus completing the liquid addition work; the external container is located inside the external container mounting bracket 16, and the external container mounting bracket 16 is fixedly installed on the outside of the control cabinet.

[0100] The F1 liquid inlet flow meter records the amount of liquid added to the water supply circuit, and the F2 liquid outlet flow meter records the amount of liquid discharged from the water supply circuit. After the data from both are transmitted to the PLC control unit, the total amount of liquid added is automatically calculated and recorded.

[0101] Water replenishment circuits are commonly found in battery packs. These circuits consist of a flexible hose that connects directly to the inside of the battery and to the electrolyte filler port, allowing for the replenishment of electrolyte to the battery pack. This process of adding electrolyte to the battery falls under the category of... Figure 8 The objects of operation of the liquid filling truck.

[0102] The caster mounting plate 7 is used to mount swivel casters.

Claims

1. A closed-pipeline liquid filling vehicle, characterized in that, It includes the overall frame of the trolley, control cabinet, water tank, waste liquid tank, liquid filling flow meter, liquid draining flow meter, liquid filling pump and liquid draining pump; The overall frame of the trolley includes a handrail, a wall-mounted connector, a back panel, a waste liquid tank mounting bracket, a chassis, a liquid filling pump mounting bracket, a liquid draining pump mounting bracket, a caster mounting plate, a terminal block, a wire trough, an electrical guide rail, and a side panel. The water filling tank is fixed to the chassis with bolts, with the water inlet facing upwards and the outlet facing downwards. The waste liquid tank is installed inside the waste liquid tank mounting bracket, which is fixed to the back panel by welding or screwing. The liquid filling pump and the liquid draining pump are respectively installed on the liquid filling pump mounting bracket and the liquid draining pump mounting bracket, which are screwed into preset holes on the base plate. The liquid filling pump and the liquid draining pump are respectively connected to the liquid filling hose and the liquid draining hose, which are fixed to the chassis by pipe hooks.

2. The closed-pipeline refueling vehicle according to claim 1, characterized in that, The control cabinet is bolted to the chassis and welded or screwed to the handrail with reinforcing ribs. The control cabinet includes a cabinet body, a panel, and a cabinet door. The panel is equipped with a color LCD HMI touch screen, status indicator lights, buttons, and an emergency stop switch. The cabinet contains a PLC control unit. The signal and power lines of the PLC control unit are connected to the components through terminal blocks and are laid in cable trays.

3. The closed-pipeline liquid filling vehicle according to claim 1, characterized in that, The PLC control unit is connected to a 12V DC power supply via terminals 1-4, the input lines of the control relay are connected to terminals 5-9, the output lines of the control relay are connected to terminals 10-11, and the closed contacts of the control circuit are connected. Terminals 12-13 are reserved ports, terminals 14-15 are connected to the liquid adding pump, terminals 16-17 are connected to the liquid discharging pump, and terminals 18-20 are connected to the input signal terminal of the liquid level sensor. The signal lines of the liquid adding flow meter and the liquid discharging flow meter are directly connected to the high-speed input terminals X04 and X05 of the PLC control unit. The data of the liquid adding and discharging volumes output by the flow meters are transmitted to the PLC for data recording.

4. The closed-pipeline liquid filling vehicle according to claim 1, characterized in that, The liquid filling flow meter is located between the water injection tank and the liquid filling pump, and the liquid draining flow meter is located between the drain port of the water replenishment circuit of the work object and the waste liquid tank. A draining pump is installed between the waste liquid tank and the external container. Liquid replenishment is manually added to the water injection tank. After clicking the start button, the liquid filling pump operates, and the liquid flows through the injection pipeline via: Water tank → F1 liquid flow meter → liquid pump → liquid replenishment circuit liquid inlet for liquid replenishment operation; When the water replenishment circuit is full, excess replenishment liquid will automatically flow out of the outlet of the water replenishment circuit, and the waste liquid will flow through the waste liquid pipeline via: Water supply circuit drain outlet → F2 drain flow meter → waste liquid tank; After the waste liquid tank is filled to the designated level, the filling pump stops and the draining pump starts to empty the waste liquid tank and discharge the waste liquid to an external container, thus completing the filling process. The F1 liquid inlet flow meter records the amount of liquid added to the water supply circuit, and the F2 liquid outlet flow meter records the amount of liquid discharged from the water supply circuit. After the data from both are transmitted to the PLC controller, the total amount of liquid added is automatically calculated and recorded.

5. A closed-pipeline refueling vehicle according to claim 5, characterized in that, The external container is located inside the external container mounting bracket, which is fixedly installed on the outside of the control cabinet.

6. A closed-pipeline refueling vehicle according to claim 1, characterized in that, The water tank has a volume of not less than 60 liters, and the waste liquid tank has a volume of not less than 5 liters. The water tank and the waste liquid tank are respectively equipped with scale markings and liquid level display windows.

7. A closed-pipeline refueling vehicle according to claim 1, characterized in that, The water tank outlet is equipped with a filter, a filling pipe connected to the filling gun, a male and female quick connector, and a return pipe for waste liquid recovery.

8. A closed-pipeline refueling vehicle according to claim 1, characterized in that, The waste liquid tank is equipped with a liquid level sensor, which feeds back the signal to the PLC to control the stopping of liquid addition and trigger an alarm.

9. A closed-pipeline refueling vehicle according to claim 1, characterized in that, All filling and draining hoses are equipped with airtight quick-connect fittings at their ends for easy connection and disconnection from vehicle interfaces.

10. A closed-pipeline refueling vehicle according to claim 1, characterized in that, The pipe interface is equipped with an embedded sealing ring and a snap-locking structure to ensure that there is no leakage or loosening during insertion and removal.

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