Integrated automotive urea filling machine and automotive urea filling system

Abstract

The utility model provides an integrated automotive urea filling machine and an automotive urea filling system. The integrated automotive urea filling machine comprises a liquid storage tank, a filling mechanism and a metering mechanism. The filling mechanism comprises a liquid supplementing pipeline, a liquid adding pipeline, a filling pump and a switching mechanism; the metering mechanism comprises a liquid adding flow meter in a liquid adding pipeline and a liquid supplementing flow meter in a liquid supplementing pipeline; the switching mechanism comprises a three-way valve, a liquid supplementing valve of a liquid supplementing pipeline and a liquid adding valve of a liquid adding pipeline; a liquid inlet of the filling pump is respectively connected with the liquid storage tank and external urea solution storage equipment through a three-way valve; a liquid outlet of the filling pump is respectively connected with a liquid supplementing pipeline and a liquid adding pipeline; an outlet of the liquid supplementing pipeline is connected with a liquid supplementing opening of the liquid storage tank, and an outlet of the liquid supplementing pipeline is connected with the filling gun; the liquid adding flow meter measures the solution flow in the liquid adding pipeline, and the liquid supplementing flow meter measures the solution flow in the liquid supplementing pipeline to meter the liquid adding quantity and the liquid supplementing quantity, so that the liquid adding quantity and the liquid supplementing quantity can be accurately metered in the liquid adding and liquid supplementing processes, and bidirectional metering of liquid adding and liquid supplementing is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle urea filling machines, and in particular to an integrated vehicle urea filling machine and a vehicle urea filling system. Background Art

[0002] Now it has become a must for diesel vehicles to use urea solution as a reducing agent for exhaust nitrogen oxides. Automotive urea was initially sold in barrels. Later, with the popularization of its use, automotive urea filling machines appeared, which can realize the filling, metering and automatic settlement of automotive urea. Automotive urea filling machines have gradually become standard equipment in gas stations. In addition, automotive urea filling machines are also widely used in logistics parks, highway service areas, auto parts stores along highways, etc. to provide automotive urea filling services for diesel vehicles.

[0003] However, the filling machine must be equipped with a replenishing pump and corresponding pipelines for replenishing. The current integrated filling machines and ground storage tanks are equipped with replenishing functions. There are several ways to calculate the replenishing quantity: ton barrel replenishment relies on the scale indication on the ton barrel to calculate the replenishing amount. The scale unit is generally 100 liters. This replenishment method has a large error and cannot achieve accurate calculation of the replenishing amount; or, tank truck delivery replenishment, which is measured based on the weighing conversion or calculated based on the scale of the ton barrel of the filling machine, which is more troublesome to operate. , the accuracy is not high; some filling machines and liquid storage tanks equipped with liquid level indicating devices rely on liquid level gauges to measure the liquid level height, and convert it into volume based on the tank capacity table of ton barrels or storage tanks. However, the accuracy of the tank capacity table is affected by many factors such as the installation environment, deformation of the ton barrel or tank body, manufacturing tolerance, liquid level fluctuation, etc. The volume number obtained by this method is not very accurate, and the cost of the liquid level meter is too high. In addition, ton barrels or liquid storage tanks need to be calibrated regularly to ensure accuracy, and the tank table calibration operation is very complicated and cumbersome.

[0004] In summary, these fluid replenishment metering methods all belong to post-unloading metering methods, and all of them have the problem of being unable to accurately control the amount of unloaded fluid. Utility Model Content

[0005] In view of this, the purpose of the present application is to provide an integrated vehicle urea filling machine and a vehicle urea filling system, which can accurately measure the amount of replenishment during the replenishment process.

[0006] An integrated vehicle urea filling machine provided in an embodiment of the present application includes a liquid storage tank, a filling mechanism, and a metering mechanism; the filling mechanism includes a liquid replenishment pipeline, a liquid adding pipeline, a filling pump, and a switching mechanism; the metering mechanism includes a liquid adding flowmeter and a liquid replenishment flowmeter, the liquid replenishment flowmeter is arranged in the liquid replenishment pipeline, and the liquid adding flowmeter is arranged in the liquid adding pipeline; the switching mechanism includes a three-way valve, a liquid replenishment valve, and a liquid adding valve;

[0007] The liquid inlet of the filling pump is respectively connected to the liquid outlet of the storage tank and the liquid replenishment interface of the external urea solution storage device through the three-way valve of the switching mechanism; the liquid outlet of the filling pump is respectively connected to the inlets of the liquid replenishment pipeline and the liquid filling pipeline; the liquid replenishment valve of the switching mechanism is arranged at the inlet of the liquid replenishment pipeline, and the liquid filling valve of the switching mechanism is arranged at the inlet of the liquid filling pipeline;

[0008] The outlet of the liquid replenishment pipeline is connected to the liquid replenishment port of the storage tank, and the outlet of the liquid filling pipeline is connected to the filling gun for liquid filling;

[0009] The liquid filling flowmeter is used to measure the flow rate of the solution passing through the liquid filling flowmeter in the liquid filling pipeline to measure the liquid filling quantity;

[0010] The liquid replenishment flowmeter is used to measure the flow rate of the solution passing through the liquid replenishment flowmeter in the liquid replenishment pipeline to measure the liquid replenishment quantity.

[0011] In some embodiments, in the integrated vehicle urea filling machine, the liquid replenishment pipeline includes an upstream pipeline and a downstream pipeline; a liquid replenishment joint is included in the liquid replenishment pipeline;

[0012] The liquid inlet of the filling pump is connected to the first interface of the three-way valve of the switching mechanism, the second interface of the three-way valve is connected to the liquid outlet of the storage tank through the upstream pipeline of the liquid replenishment pipeline, and the third interface of the three-way valve is connected to the liquid replenishment interface of the external urea solution storage device through the liquid replenishment joint.

[0013] In some embodiments, in the integrated vehicle urea filling machine, the downstream pipeline includes a common pipeline shared with the liquid filling pipeline;

[0014] The liquid inlet of the filling pump is connected to the liquid replenishment pipeline and the liquid filling pipeline through the common pipeline; a check valve is arranged in the common pipeline.

[0015] In some embodiments, in the integrated vehicle urea filling machine, a liquid replenishment solenoid valve is arranged in the liquid replenishment pipeline, and a liquid filling solenoid valve is arranged in the liquid filling pipeline.

[0016] In some embodiments, in the integrated vehicle urea filling machine, the integrated vehicle urea filling machine further includes a liquid replenishment switch, a gun valve arranged on the gun hanging part of the filling gun, and a pressure switch at the gun hanging position;

[0017] The gun valve is used to control the start and stop of filling;

[0018] The pressure switch is used to control the start and stop of the filling pump during liquid filling;

[0019] The liquid replenishment switch is used to manually control the start and stop of the filling pump during liquid replenishment.

[0020] In some embodiments, in the integrated vehicle urea filling machine, a liquid filling filter is provided in the liquid filling pipeline, and the liquid filling filter is arranged between the liquid filling valve and the liquid filling flowmeter;

[0021] A liquid replenishing filter is provided in the liquid replenishing pipeline, and the liquid replenishing filter is arranged between the liquid replenishing valve and the liquid replenishing flowmeter.

[0022] In some embodiments, in the integrated vehicle urea filling machine, the integrated vehicle urea filling machine further includes a frame;

[0023] The frame is used to fix the liquid replenishing pipeline, the liquid filling pipeline, and the filling pump on the side of the liquid storage tank;

[0024] The frame includes a fixing plate for supporting the liquid filling flowmeter.

[0025] In some embodiments, in the integrated vehicle urea filling machine, a sight liquid device is arranged at the outlet of the liquid filling flowmeter.

[0026] In some embodiments, in the integrated vehicle urea filling machine, the liquid replenishing flowmeter in the liquid replenishing pipeline is located downstream of the liquid replenishing solenoid valve; the liquid filling flowmeter in the liquid filling pipeline is located downstream of the liquid filling solenoid valve.

[0027] In some embodiments, a vehicle urea filling system is further provided, including the integrated vehicle urea filling machine.

[0028] An integrated vehicle urea filling machine and a vehicle urea filling system are provided in an embodiment of the present application. The integrated vehicle urea filling machine includes a liquid storage tank, a filling mechanism, and a metering mechanism. The filling mechanism includes a replenishing pipeline, a liquid adding pipeline, a filling pump, and a switching mechanism. The metering mechanism includes a liquid adding flowmeter and a replenishing flowmeter. The replenishing flowmeter is arranged in the replenishing pipeline, and the liquid adding flowmeter is arranged in the liquid adding pipeline. The switching mechanism includes a three-way valve, a replenishing valve, and a liquid adding valve. The inlet of the filling pump is respectively connected to the outlet of the liquid storage tank and the replenishing interface of an external urea solution storage device through the three-way valve of the switching mechanism. The outlet of the filling pump is respectively connected to the inlets of the replenishing pipeline and the liquid adding pipeline. The replenishing valve of the switching mechanism is arranged at the inlet of the replenishing pipeline, and the liquid adding valve of the switching mechanism is arranged at the inlet of the liquid adding pipeline. The outlet of the replenishing pipeline is connected to the replenishing port of the liquid storage tank, and the outlet of the liquid adding pipeline is connected to a filling gun for liquid adding. The liquid adding flowmeter is used to measure the solution flow rate passing through the liquid adding flowmeter in the liquid adding pipeline to measure the liquid adding quantity. The replenishing flowmeter is used to measure the solution flow rate passing through the replenishing flowmeter in the replenishing pipeline to measure the replenishing quantity. Thus, the switching between the liquid adding function and the replenishing function is realized through the switching mechanism, and accurate two-way metering of liquid adding and replenishing is realized through the liquid adding flowmeter and the replenishing flowmeter, making the integrated vehicle urea filling machine easy to use, without the need for conversion, and convenient for maintenance, reducing the tank meter correction operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0030] Figure 1 FIG. shows a schematic structural diagram of the integrated vehicle urea filling machine described in the embodiment of the present application;

[0031] Figure 2 FIG. shows a schematic block diagram of the principle of the integrated vehicle urea filling machine described in the embodiment of the present application;

[0032] Figure 3 FIG. shows a schematic structural diagram of the frame described in the embodiment of the present application.

[0033] 1. First manual valve; 2. Three-way valve; 3. Refilling filter; 4. Refilling connector; 5. Filling pump; 6. Check valve; 7. Refilling valve; 8. Three-way joint; 9. Liquid adding valve; 10. Liquid adding filter; 11. Refilling flowmeter; 12. Refilling solenoid valve; 13. Sight liquid device; 14. Liquid adding flowmeter; 15. Liquid adding solenoid valve; 16. Liquid storage tank; 17. Filling gun; 18. Frame; 19. Fixed plate. Detailed implementation manners

[0034] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It should be understood that the accompanying drawings in the present application are only for the purposes of illustration and description, and are not used to limit the protection scope of the present application. In addition, it should be understood that the schematic drawings are not drawn in accordance with the actual proportions. The flowcharts used in the present application illustrate the operations implemented according to some embodiments of the present application. It should be understood that the operations in the flowcharts may not be implemented in sequence, and the steps without logical context relationships may be reversed or implemented simultaneously. In addition, those skilled in the art may add one or more other operations to the flowchart or remove one or more operations from the flowchart under the guidance of the content of the present application.

[0035] In addition, the described embodiments are only some embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application usually described and illustrated in the accompanying drawings here may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application claimed, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present application.

[0036] It should be noted that the term "including" will be used in the embodiments of the present application to indicate the existence of the features stated thereafter, but does not exclude the addition of other features.

[0037] Now, it has become necessary to use urea solution as the tail gas nitrogen oxide reductant for diesel vehicles during driving. Initially, vehicle urea was sold in a retail form in barrels. Later, with the popularization of its use, vehicle urea filling machines emerged, which can achieve vehicle urea filling, metering, and automated settlement. Slowly, vehicle urea filling machines have become standard equipment in gas stations. In addition, vehicle urea filling machines are also widely used in logistics parks, highway service areas, auto parts stores beside roads, etc. to provide vehicle urea filling services for diesel vehicles.

[0038] However, the filling machine must be equipped with a replenishing pump and corresponding pipelines for replenishing. The current integrated filling machines and ground storage tanks are equipped with replenishing functions. There are several ways to calculate the replenishing quantity: ton barrel replenishment relies on the scale indication on the ton barrel to calculate the replenishing amount. The scale unit is generally 100 liters. This replenishment method has a large error and cannot achieve accurate calculation of the replenishing amount; or, tank truck delivery replenishment, which is measured based on the weighing conversion or calculated based on the scale of the ton barrel of the filling machine, which is more troublesome to operate. , the accuracy is not high; some filling machines and liquid storage tanks equipped with liquid level indicating devices rely on liquid level gauges to measure the liquid level height, and convert it into volume based on the tank capacity table of ton barrels or storage tanks. However, the accuracy of the tank capacity table is affected by many factors such as the installation environment, deformation of the ton barrel or tank body, manufacturing tolerance, liquid level fluctuation, etc. The volume number obtained by this method is not very accurate, and the cost of the liquid level meter is too high. In addition, ton barrels or liquid storage tanks need to be calibrated regularly to ensure accuracy, and the tank table calibration operation is very complicated and cumbersome.

[0039] In summary, these fluid replenishment metering methods all belong to post-unloading metering methods, and all of them have the problem of being unable to accurately control the amount of unloaded fluid.

[0040] Based on this, in an embodiment of the present application, an integrated vehicle urea filling machine and a vehicle urea filling system are provided, wherein the integrated vehicle urea filling machine comprises a liquid storage tank, a filling mechanism, and a metering mechanism; the filling mechanism comprises a liquid replenishing pipeline, a liquid adding pipeline, a filling pump and a switching mechanism; the metering mechanism comprises a liquid adding flowmeter and a liquid replenishing flowmeter, the liquid replenishing flowmeter is arranged in the liquid replenishing pipeline, and the liquid adding flowmeter is arranged in the liquid adding pipeline; the switching mechanism comprises a three-way valve, a liquid replenishing valve and a liquid adding valve; the liquid inlet of the filling pump is respectively connected to the liquid outlet of the liquid storage tank and the liquid replenishing interface of the external urea solution storage device through the three-way valve of the switching mechanism; the liquid outlet of the filling pump is respectively connected to the inlet of the liquid replenishing pipeline and the inlet of the liquid adding pipeline; the filling The liquid valve is arranged at the inlet of the liquid replenishing pipeline, and the liquid adding valve of the switching mechanism is arranged at the inlet of the liquid adding pipeline; the outlet of the liquid replenishing pipeline is connected to the liquid replenishing port of the liquid storage tank, and the outlet of the liquid adding pipeline is connected to the filling gun for adding liquid; the liquid adding flowmeter is used to measure the flow rate of the solution passing through the liquid adding flowmeter in the liquid adding pipeline to measure the amount of liquid added; the liquid replenishing flowmeter is used to measure the flow rate of the solution passing through the liquid replenishing flowmeter in the liquid replenishing pipeline to measure the amount of liquid replenishment, so as to realize the switching of the liquid adding function and the liquid replenishing function through the switching mechanism, and realize accurate two-way measurement of liquid adding and liquid replenishment through the liquid adding flowmeter and the liquid replenishing flowmeter, so that the integrated vehicle urea filling machine is easy to use, no conversion is required, and maintenance is convenient, reducing the tank meter correction operation.

[0041] Please refer to Figure 1 and Figure 2 , Figure 1Shows a schematic structural diagram of the integrated vehicle urea filling machine described in the embodiments of the present application; Figure 2 Shows a principle block diagram of the integrated vehicle urea filling machine; As Figure 1 Shown, an integrated vehicle urea filling machine described in the embodiments of the present application includes a liquid storage tank 16, a filling mechanism, and a metering mechanism; the filling mechanism includes a replenishing pipeline, a liquid adding pipeline, a filling pump 5, and a switching mechanism; the metering mechanism includes a liquid adding flowmeter 14 and a replenishing flowmeter 11, the replenishing flowmeter 11 is arranged in the replenishing pipeline, and the liquid adding flowmeter 14 is arranged in the liquid adding pipeline; the switching mechanism includes a three-way valve 2, a replenishing valve 7, and a liquid adding valve 9;

[0042] The inlet of the filling pump 5 is respectively connected to the outlet of the liquid storage tank 16 and the replenishing interface of the external urea solution storage device through the three-way valve 2 of the switching mechanism; the outlet of the filling pump 5 is respectively connected to the inlets of the replenishing pipeline and the liquid adding pipeline; the replenishing valve 7 of the switching mechanism is arranged at the inlet of the replenishing pipeline, and the liquid adding valve 9 of the switching mechanism is arranged at the inlet of the liquid adding pipeline;

[0043] The outlet of the replenishing pipeline is connected to the replenishing port of the liquid storage tank 16, and the outlet of the liquid adding pipeline is connected to a filling gun 17 for liquid adding;

[0044] The liquid adding flowmeter 14 is used to measure the flow rate of the solution passing through the liquid adding flowmeter 14 in the liquid adding pipeline to measure the liquid adding quantity;

[0045] The replenishing flowmeter 11 is used to measure the flow rate of the solution passing through the replenishing flowmeter 11 in the replenishing pipeline to measure the replenishing quantity.

[0046] The switching mechanism is used to realize the switching between the liquid adding mode and the replenishing mode by manually switching the states of the three-way valve 2, the replenishing valve 7, and the liquid adding valve 9.

[0047] Specifically, when it is necessary to switch to the liquid adding mode, the three-way valve 2 is switched to the state where the outlet of the liquid storage tank 16 is communicated with the inlet of the filling pump 5, the liquid adding valve 9 is switched to the conducting state, and the replenishing valve 7 is switched to the closed state; when it is necessary to switch to the replenishing mode, the three-way valve 2 is switched to the state where the replenishing interface of the external urea solution storage device is communicated with the inlet of the filling pump 5, the liquid adding valve 9 is switched to the closed state, and the replenishing valve 7 is switched to the conducting state.

[0048] During the replenishing operation in the replenishing mode, the replenishing operation can also be called the liquid discharging operation, which refers to adding new urea solution into the filling machine when the urea solution is exhausted or needs to be replenished. During the liquid adding operation in the liquid adding mode, the liquid adding operation mainly refers to filling the urea solution from the filling machine into the tail gas treatment urea tank of the vehicle.

[0049] The liquid storage tank 16 is used to store urea solution; in some embodiments, the liquid storage tank 16 can be a ton barrel.

[0050] Please refer to Figure 1 , in the integrated vehicle urea filling machine, the replenishing pipeline includes an upstream pipeline and a downstream pipeline; the replenishing pipeline includes a replenishing joint 4;

[0051] The liquid inlet of the filling pump 5 is connected to the first interface of the three-way valve 2 of the switching mechanism. The second interface of the three-way valve 2 is connected to the liquid outlet of the liquid storage tank 16 through the upstream pipeline of the replenishing pipeline. The third interface of the three-way valve 2 is connected to the replenishing interface of an external urea solution storage device through the replenishing joint 4.

[0052] In the embodiment of the present application, in the integrated vehicle urea filling machine, the downstream pipeline includes a common pipeline shared with the liquid adding pipeline;

[0053] The liquid inlet of the filling pump 5 is connected to the replenishing pipeline and the liquid adding pipeline through the common pipeline; a check valve 6 is arranged in the common pipeline.

[0054] The check valve 6 can prevent the backflow of the filling solution and avoid the situation of the gun running while the hose is lifted (due to the expansion rate of the hose), which affects the metering accuracy.

[0055] The replenishing joint 4 is used to connect to the replenishing interface of an external urea solution storage device, and the tail of the replenishing joint 4 tilts upward. The upward tilt of the tail of the replenishing joint 4 can effectively prevent the dripping of urea solution during the connection or disconnection process. Since urea solution is corrosive, if it drips directly onto the vehicle chassis or other components, it may cause damage. The upward tilt design allows any possible residual liquid to flow back into the storage device along the inclined plane of the joint, keeping the vehicle and the surrounding environment clean and reducing environmental pollution; for users, the replenishing joint 4 with an upward tilted tail may be easier to find and connect. In some cases with poor visibility or limited space, this design can provide better visibility and operability and reduce the risk of misoperation.

[0056] Preferably, the replenishing joint 4 adopts a quick self-sealing joint to prevent the dripping of urea solution.

[0057] In the embodiment of the present application, a replenishing solenoid valve 12 is arranged in the replenishing pipeline, and a liquid adding solenoid valve 15 is arranged in the liquid adding pipeline.

[0058] In some embodiments, the integrated vehicle urea filling machine is further provided with an electronic control system; the liquid filling solenoid valve 15 and the replenishing solenoid valve 12 are started and stopped under the control of the electronic control system, and the electronic control system controls the liquid filling solenoid valve 15 or the replenishing solenoid valve 12 to act based on the set filling volume, the real-time measured liquid filling quantity or replenishing quantity, so as to achieve quantitative filling.

[0059] That is to say, in the embodiments of the present application, in addition to manually controlling the conduction of the replenishing pipeline and the liquid filling pipeline, a replenishing solenoid valve 12 and a liquid filling solenoid valve 15 are also provided, and automatic control is carried out through the electronic control system to accurately control the two-way quantitative filling in the liquid filling and replenishing processes, avoiding problems such as waste and leakage of urea solution that may be caused by improper manual operation or negligence.

[0060] It should be noted that in the manual operation mode, the replenishing solenoid valve 12 and the liquid filling solenoid valve 15 are in the normally open state.

[0061] Specifically, in the embodiments of the present application, the integrated vehicle urea filling machine further includes a replenishing switch, a gun valve arranged on the hanging gun of the liquid filling gun, and a pressure switch at the hanging gun position;

[0062] The gun valve is used to control the start and stop of filling;

[0063] The pressure switch is used to control the start and stop of the filling pump 5 during liquid filling;

[0064] The replenishing switch is used to manually control the start and stop of the filling pump 5 during replenishment.

[0065] The replenishing switch can also be a single switch (for example, closing starts the filling pump 5 and resetting stops the pump), or two switches (for example, one switch is used to start the filling pump 5 and the other switch is used to stop the pump).

[0066] Specifically, for the pressure switch at the hanging gun position of the filling gun 17, when the filling gun 17 is correctly hung and a certain pressure is applied, the pressure switch is triggered, and then the filling pump 5 is started to start the liquid filling process. When the filling is completed or the filling gun 17 is removed, the pressure disappears, the pressure switch resets, and the filling pump 5 stops.

[0067] The gun valve in the filling pump 5 can timely control the start and stop of filling, so as to more accurately control the filling volume of the urea solution and avoid overfilling or underfilling. The replenishing switch can be set as a push-button switch. The user can press the button according to needs to start the replenishing process, and at this time the filling pump 5 starts; when the replenishment is completed or needs to be stopped, the user presses the button again (or presses another stop button, depending on the design), and the filling pump 5 stops.

[0068] Specifically, the filling pump 5 is driven by a motor. The liquid replenishment switch or the pressure switch outputs a switch signal to the motor to control the start and stop of the motor, thereby controlling the operation of the filling pump 5.

[0069] Please refer to Figure 1 , in the integrated vehicle urea filling machine described in the embodiment of the present application, a liquid filling filter 10 is provided in the liquid filling pipeline, and the liquid filling filter 10 is arranged between the liquid filling valve 9 and the liquid filling flowmeter 14;

[0070] A liquid replenishment filter 3 is provided in the liquid replenishment pipeline, and the liquid replenishment filter 3 is arranged between the liquid replenishment valve 7 and the liquid replenishment flowmeter 11.

[0071] Specifically, a first cleaning pipe is provided at the position of the liquid filling filter 10 of the liquid filling pipeline. One end of the first cleaning pipe is communicated with the liquid filling pipeline, and a first sealing cover is detachably arranged at the other end;

[0072] A second cleaning pipe is provided at the position of the liquid replenishment filter 3 of the liquid replenishment pipeline. One end of the second cleaning pipe is communicated with the liquid replenishment pipeline, and a second sealing cover is detachably arranged at the other end.

[0073] The liquid filling filter 10 is arranged between the liquid filling valve 9 and the liquid filling flowmeter 14. Such a design can ensure that the urea solution is filtered before being metered, thereby protecting the subsequent flowmeter and other equipment from being affected by impurities.

[0074] In order to clean or replace the liquid filling filter 10, a first cleaning pipe is provided at the position of the liquid filling filter 10. One end of the first cleaning pipe is communicated with the liquid filling pipeline, and the other end is closed by a detachable first sealing cover. When it is necessary to clean or replace the filter, the first sealing cover can be opened, and the operation can be carried out through the first cleaning pipe, and then resealed after completion.

[0075] The liquid replenishment filter 3 is arranged between the liquid replenishment valve 7 and the liquid replenishment flowmeter 11. Similar to the liquid filling filter 10, the liquid replenishment filter 3 is also located before the metering device to ensure that the urea solution entering the system is clean. Similarly, open the second sealing cover, clean or replace the liquid replenishment filter 3 through the second cleaning pipe, and then reseal after completion.

[0076] That is to say, by setting the liquid filling filter 10 and the liquid replenishment filter 3, impurities can be effectively prevented from entering the flowmeter to protect the flowmeter; the design of the cleaning pipe with a detachable sealing cover makes the cleaning or replacement of the filter simple and fast, improving the maintenance efficiency; the clean urea solution helps to keep the integrated vehicle urea filling machine running stably, reduce the occurrence of faults, and improve the overall reliability of the system.

[0077] Please refer to Figure 3 , Figure 3The structural schematic diagram of the rack 18 according to the embodiment of the present application is shown; the integrated vehicle urea filling machine according to the embodiment of the present application further includes a rack 18;

[0078] The rack 18 is used to fix the liquid replenishing pipeline, the liquid filling pipeline, and the filling pump 5 on the side of the liquid storage tank 16;

[0079] The rack 18 includes a fixing plate 19 for supporting the liquid filling flowmeter 14.

[0080] Meanwhile, the liquid outlet of the liquid storage tank 16 is located at the lower end of the side wall of the liquid storage tank 16, and the liquid replenishing port of the liquid storage tank 16 is located at the top; the liquid replenishing pipeline and the liquid filling pipeline are arranged in the up-and-down direction.

[0081] Fixing the related components of the filling machine on the side of the liquid storage tank 16 can effectively utilize the space, making the structure of the whole filling machine more compact. The up-and-down arrangement method enables the operator to access each component more conveniently during the filling, liquid replenishing, and maintenance processes.

[0082] The rack 18 includes a plurality of transverse plates and vertical fixing columns, thereby ensuring the overall stability of the filling machine and reducing the risk of component loosening or damage caused by factors such as vibration and shaking.

[0083] In the embodiment of the present application, the liquid filling flowmeter 14 is a high-precision stainless steel positive displacement flowmeter for measurement, with an accuracy of ±0.3 to 0.5% (the requirement of the vehicle urea filling machine type evaluation outline is ±0.5%); the liquid replenishing flowmeter 11 is a flowmeter with a digital display function for measurement, and the total unloading liters can be accurately measured by a high-precision flowmeter, and the accuracy can reach ±0.5%; the liquid replenishing measurement accuracy depends on the accuracy of the selected liquid replenishing flowmeter 11. It should be noted that the liquid filling measurement accuracy requirement is higher because the liquid filling operation is to add vehicle urea to the vehicle, and the accuracy of its filling amount directly affects the emission performance and environmental protection standards of the vehicle. The liquid replenishing accuracy is also important, but the capacity of the liquid storage tank 16 is very large, and its accuracy has a relatively small direct impact on the overall system performance or product quality of the filling machine, so its accuracy requirement can be relatively looser.

[0084] Therefore, the liquid filling flowmeter 14 is relatively large in volume. In order to keep the liquid filling flowmeter 14 stable, a fixing plate 19 for supporting the liquid filling flowmeter 14 is designed in the rack 18

[0085] In the integrated vehicle urea filling machine according to the embodiment of the present application, a sight liquid device 13 is provided at the outlet of the liquid filling flowmeter 14.

[0086] The outlet of the sight liquid device 13 is connected to a rubber hose and a filling gun 17.

[0087] At the liquid outlet of the liquid storage tank 16, a first manual valve 1 is also provided. The first manual valve 1 allows the operator to manually adjust the opening degree of the valve according to actual needs, so as to accurately control the outflow speed and flow rate of the urea solution. During the filling process, if an emergency occurs or it is necessary to stop the liquid filling immediately, the operator can quickly close the first manual valve 1 to cut off the flow of the urea solution.

[0088] That is to say, in the integrated vehicle urea filling machine described in the embodiment of the present application, a total of three manual valves are provided, namely the first manual valve 1, the second manual valve (refilling valve 7) and the third manual valve (filling valve 9). Refilling valve 7.

[0089] In the embodiment of the present application, in order to improve the accuracy, in the integrated vehicle urea filling machine, the refilling flowmeter 11 in the refilling pipeline is located downstream of the refilling solenoid valve 12; the filling flowmeter 14 in the filling pipeline is located downstream of the filling solenoid valve 15.

[0090] Placing the flowmeter downstream of the solenoid valve can ensure that when the flowmeter measures, the liquid has passed through the control area of the solenoid valve. This can avoid the influence of the opening and closing actions of the solenoid valve on the measurement accuracy of the flowmeter, because the solenoid valve may generate pressure fluctuations or liquid disturbances during the opening and closing process, thus affecting the reading of the flowmeter. After the liquid passes through the solenoid valve, its flow state will tend to be stable. In a stable flow state, the measurement accuracy of the flowmeter is higher, because the design of the flowmeter is usually based on the principle of stable fluid dynamics.

[0091] In order to display the measurement results of the refilling flowmeter 11 and the filling flowmeter 14, a display can be set in the filling machine; the flow data measured by the refilling flowmeter 11 and the filling flowmeter 14 are input into the display to display the refilling quantity or the filling quantity, which is convenient for the user to stop refilling or filling.

[0092] Please refer to Figure 2 , in the embodiment of the present application, specifically, both the refilling flowmeter 11 and the filling flowmeter 14 are equipped with a corresponding encoder, and the input end of the display is respectively connected to the encoders of the refilling flowmeter 11 and the filling flowmeter 14. In this way, the display can read the flow data measured by the two flowmeters in real time.

[0093] The working principles of the flowmeter and the encoder are as follows: The flowmeter is used for measurement. When the fluid passes through the flowmeter, the sensors inside the flowmeter will sense the flow condition of the fluid and convert it into measurable physical quantities (such as pressure difference, velocity, etc.); then, these physical quantities are further processed into flow data; Encoder conversion: The encoder receives the flow data from the flowmeter and converts it into electrical signals or digital signals, which have specific formats and coding rules for being recognized and processed by the display. The replenishing flowmeter 11 and the filling flowmeter 14 are each equipped with a corresponding encoder. This one-to-one correspondence ensures the accuracy and reliability of the flow data because the output of each flowmeter directly corresponds to a specific encoder, reducing errors during data transmission and conversion.

[0094] The following combines Figure 2 , and specifically describes the flow direction of the urea solution in the filling machine in the filling mode and the replenishing mode. In Figure 2 , the thin arrow indicates the flow direction of the urea solution during replenishment, and the thick arrow indicates the flow direction of the urea solution during filling.

[0095] In the replenishing mode, the urea solution sequentially passes through the replenishing joint 4 → three-way valve 2 → filling pump 5 → one-way valve 6 → three-way 8 → replenishing valve 7 → replenishing filter 3 → replenishing solenoid valve 12 → replenishing flowmeter 11 → the filling port of the ton barrel / liquid storage tank 16. The replenishing flowmeter 11 measures the quantity of the urea solution passing through and finally fills it into the ton barrel or the liquid storage tank 16.

[0096] In the filling mode, filling sequentially passes through the liquid outlet of the ton barrel / storage tank → filling manual valve → three-way valve 2 → filling pump 5 → one-way valve 6 → three-way 8 → filling valve 9 → filling filter 10 → filling solenoid valve 15 → filling flowmeter 14 → sight liquid device 13 → hose → filling gun → vehicle urea tank. The filling flowmeter 14 measures the urea solution filled into the vehicle.

[0097] Based on the same inventive concept, the embodiments of the present application also provide a vehicle urea filling system corresponding to the integrated vehicle urea filling machine. Since the principle of solving problems by the vehicle urea filling system in the embodiments of the present application is similar to that of the above-mentioned integrated vehicle urea filling machine in the embodiments of the present application, the implementation of the vehicle urea filling system can refer to the implementation of the integrated vehicle urea filling machine, and the repeated parts will not be elaborated.

[0098] In some embodiments, a vehicle urea filling system is also provided, and the vehicle urea filling system includes the integrated vehicle urea filling machine described in the embodiments of the present application.

[0099] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the systems and devices described above can refer to the corresponding processes in the method embodiments, and will not be elaborated herein. In several embodiments provided in the present application, it should be understood that the disclosed systems and devices can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of the mechanisms is only a logical function division, and there can be other division methods in actual implementation. For another example, multiple modules or components can be combined or integrated into another system, or some features can be ignored.

[0100] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application, and all of them should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An integrated vehicle urea filling machine, characterized in that It includes a liquid storage tank, a filling mechanism, and a metering mechanism; the filling mechanism includes a liquid replenishment pipeline, a liquid adding pipeline, a filling pump, and a switching mechanism; the metering mechanism includes a liquid adding flowmeter and a liquid replenishment flowmeter, the liquid replenishment flowmeter is arranged in the liquid replenishment pipeline, and the liquid adding flowmeter is arranged in the liquid adding pipeline; the switching mechanism includes a three-way valve, a liquid replenishment valve, and a liquid adding valve; The inlet of the filling pump is respectively connected to the outlet of the liquid storage tank and the liquid replenishment interface of an external urea solution storage device through the three-way valve of the switching mechanism; the outlet of the filling pump is respectively connected to the inlets of the liquid replenishment pipeline and the liquid adding pipeline; the liquid replenishment valve of the switching mechanism is arranged at the inlet of the liquid replenishment pipeline, and the liquid adding valve of the switching mechanism is arranged at the inlet of the liquid adding pipeline; The outlet of the liquid replenishment pipeline is connected to the liquid replenishment port of the liquid storage tank, and the outlet of the liquid adding pipeline is connected to a filling gun for liquid adding; The liquid adding flowmeter is used to measure the flow rate of the solution passing through the liquid adding flowmeter in the liquid adding pipeline to measure the quantity of liquid added; The liquid replenishment flowmeter is used to measure the flow rate of the solution passing through the liquid replenishment flowmeter in the liquid replenishment pipeline to measure the quantity of liquid replenished.

2. The integrated vehicle urea filling machine according to claim 1, characterized in that, The liquid replenishment pipeline includes an upstream pipeline and a downstream pipeline; a liquid replenishment joint is included in the liquid replenishment pipeline; The inlet of the filling pump is connected to the first interface of the three-way valve of the switching mechanism, the second interface of the three-way valve is connected to the outlet of the liquid storage tank through the upstream pipeline of the liquid replenishment pipeline, and the third interface of the three-way valve is connected to the liquid replenishment interface of the external urea solution storage device through the liquid replenishment joint.

3. The integrated vehicle urea filling machine according to claim 2, characterized in that, A common pipeline shared with the liquid adding pipeline is included in the downstream pipeline; The inlet of the filling pump is connected to the liquid replenishment pipeline and the liquid adding pipeline through the common pipeline; a check valve is arranged in the common pipeline.

4. The integrated vehicle urea filling machine according to claim 1, wherein, A liquid replenishment solenoid valve is arranged in the liquid replenishment pipeline, and a liquid adding solenoid valve is arranged in the liquid adding pipeline.

5. The integrated vehicle urea filling machine according to claim 4, wherein, The integrated vehicle urea filling machine further includes a liquid replenishment switch, a gun valve arranged on the gun hanging part of the filling gun, and a pressure switch at the gun hanging place; The gun valve is used to control the start and stop of filling; The pressure switch is used to control the start and stop of the filling pump during liquid adding; The liquid replenishment switch is used to manually control the start and stop of the filling pump during liquid replenishment.

6. The integrated vehicle urea filling machine according to claim 1, wherein, A liquid adding filter is arranged in the liquid adding pipeline, and the liquid adding filter is arranged between the liquid adding valve and the liquid adding flowmeter; A liquid replenishment filter is arranged in the liquid replenishment pipeline, and the liquid replenishment filter is arranged between the liquid replenishment valve and the liquid replenishment flowmeter.

7. The integrated vehicle urea filling machine according to claim 1, characterized in that, The integrated vehicle urea filling machine further includes a frame; The frame is used to fix the liquid replenishment pipeline, the liquid adding pipeline, and the filling pump on the side of the liquid storage tank; A fixing plate for supporting the liquid adding flowmeter is included in the frame.

8. The integrated vehicle urea filling machine according to claim 1 or 7, characterized in that A sight liquid device is arranged at the outlet of the liquid adding flowmeter.

9. The integrated vehicle urea filling machine according to claim 1, wherein The liquid replenishment flowmeter in the liquid replenishment pipeline is located downstream of the liquid replenishment solenoid valve; the liquid adding flowmeter in the liquid adding pipeline is located downstream of the liquid adding solenoid valve.

10. A vehicle urea filling system, characterized in that, It includes the integrated vehicle urea filling machine according to any one of claims 1-9.

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