Air source type endless constant pressure vacuum brake fluid filling device

Abstract

The present application relates to oil filling technical field, and disclose a gas source type endless constant pressure vacuum brake fluid filling device, including: workbench, the workbench is provided with circuit board; The electric vacuum pump, vacuum static tank and liquid storage tank are arranged on the workbench, the electric vacuum pump is connected with vacuum static tank through first pipeline, the liquid storage tank is connected with vacuum static tank through second pipeline, the vacuum static tank is also provided with liquid discharge assembly, the second pipeline is provided with vacuum pressure display assembly for observing pressure value; Control valve assembly for controlling the connection state between filling pipeline interface and vacuum static tank and the connection state between filling pipeline interface and liquid storage tank, control valve assembly is arranged on the second pipeline, and filling pipeline interface is connected with the second pipeline through the fifth pipeline, the present application can make the system reach normal use requirement once successful filling, and the operation is simple and the working efficiency is high.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of oil filling, and particularly relates to a gas source type endless constant pressure vacuum brake fluid filling device. BACKGROUND

[0002] The hydraulic control is adopted in the brake system of large vehicles or some special vehicles, and the oil filling of the hydraulic system needs to be performed during the trial production of the vehicles.

[0003] The conventional operation mainly includes the following kinds, and the filling method is as follows: first filling operation: an oil gun is used to fill the required oil into the system, then the system oil pressure is established through frequent manual operation, the exhaust is performed through the system exhaust port, and finally the oil filling is verified and judged through continuous trial operation. During the test, if the hydraulic system leaks, the system needs to be depressurized, and the oil in the system needs to be discharged for maintenance; daily maintenance operation: the oil needs to be replaced after the vehicle is used for a certain service life, the pipeline needs to be cleaned and drained, the oil is discharged from the lowest oil drain port by gravity, and the oil filling is repeated.

[0004] The main problems in the above filling process are: the filling process is not only tedious and time-consuming, the system sealing performance cannot be verified before filling, and the verification demand of the research and development process cannot be met; air is mixed into the filling process, which causes the manual exhaust process to be tedious after the filling is completed; the oil pressure is established by manual operation after the filling, the oil pressure is unstable due to the air mixed in the oil, and the system frequently works abnormally; the oil discharge process is not complete, and part of the oil cannot be completely discharged due to the slow flow rate caused by the viscosity problem. Therefore, in view of the above status, it is urgent to provide a gas source type endless constant pressure vacuum brake fluid filling device to overcome the deficiencies in the actual application. SUMMARY

[0005] In view of the above problems, the gas source type endless constant pressure vacuum brake fluid filling device is provided to overcome the defects of the prior art, and effectively solves the problems that the filling process is not only tedious and time-consuming, the system sealing performance cannot be verified before filling, the verification demand of the research and development process cannot be met, air is mixed into the filling process, which causes the manual exhaust process to be tedious after the filling is completed, the oil pressure is established by manual operation after the filling, the oil pressure is unstable due to the air mixed in the oil, the system frequently works abnormally, and the oil discharge process is not complete, and part of the oil cannot be completely discharged due to the slow flow rate caused by the viscosity problem.

[0006] To achieve the above purpose, the technical scheme provided by the application is as follows: the gas source type endless constant pressure vacuum brake fluid filling device comprises:

[0007] A workbench is internally provided with a circuit board;

[0008] An electric vacuum pump, a vacuum standing tank and a liquid storage tank are arranged on the workbench, the electric vacuum pump and the vacuum standing tank are connected through a first pipeline, the liquid storage tank and the vacuum standing tank are connected through a second pipeline, a liquid discharge assembly is further arranged on the vacuum standing tank, and a vacuum pressure display assembly for observing a pressure value is arranged on the second pipeline;

[0009] A control valve assembly for controlling connection states between the filling pipeline interface and the vacuum standing tank and between the filling pipeline interface and the liquid storage tank is arranged on the second pipeline.

[0010] The filling pipeline interface is connected with the second pipeline through a fifth pipeline.

[0011] As a further optimization of the technical solution, the liquid discharge assembly comprises a vacuum standing tank liquid discharge valve connected with the vacuum standing tank through a liquid discharge pipeline.

[0012] As a further optimization of the technical solution, the vacuum pressure display assembly comprises a vacuum pressure gauge connected with the second pipeline through a third pipeline, and a second vacuum pipeline valve is further arranged on the third pipeline.

[0013] As a further optimization of the technical solution, the control valve assembly comprises a first vacuum pipeline valve and a second filling pipeline valve, both of which are arranged on the second pipeline.

[0014] As a further optimization of the technical solution, the first vacuum pipeline valve and the second filling pipeline valve are respectively located on two sides of the fifth pipeline, and the vacuum pressure display assembly is located between the first vacuum pipeline valve and the vacuum standing tank.

[0015] As a further optimization of the technical solution, a filling pressure gauge is further included, which is connected with the fifth pipeline through a fourth pipeline.

[0016] As a further optimization of the technical solution, a first filling pipeline valve is further arranged on the fourth pipeline.

[0017] As a further optimization of the technical solution, a compressed air pressure gauge for detecting pressure during filling is further included, which is arranged on the liquid storage tank.

[0018] As a further optimization of the technical solution, a compressed air pipeline valve is further arranged on the liquid storage tank.

[0019] As a further optimization of the technical solution, a liquid filling pipeline valve is further arranged on the liquid storage tank.

[0020] Compared with the prior art, the application has the beneficial effects that the application effectively solves the problem that the operator cannot determine the sealing property of the brake system before filling, the operator needs to perform manual exhaust operation after filling, the operator needs to manually establish the required oil pressure after the exhaust is completed, and the high-pressure filling is infinitely adjustable; it is flexible, portable, efficient, low in cost, convenient for on-site transfer, and does not need to be adjusted for one-time filling; and the specific implementation is as follows:

[0021] Vacuum pipeline self-checking process: sequentially close the first vacuum pipeline valve and the vacuum standing tank liquid discharge valve, and simultaneously open the second vacuum pipeline valve; after the above operations are completed, the electric vacuum pump is opened, the value of the vacuum pressure gauge is observed, when the value displayed by the vacuum pressure gauge is reduced to the required interval (≤10 mbar), the electric vacuum pump is closed, at this time, the one-way check valve arranged in the electric vacuum pump starts to work, and the air inlet is automatically closed; after the air source type infinitely constant pressure vacuum brake fluid filling device stands for one minute, it is observed that the value indicated by the vacuum pressure gauge is still within the effective range.

[0022] Vacuumizing process: first, the filling pipeline interface is connected with the vehicle body oil storage pipeline, the second filling pipeline valve, the first filling pipeline valve and the vacuum standing tank liquid discharge valve are sequentially closed, and the first vacuum pipeline valve and the second vacuum pipeline valve are simultaneously opened; after the above operations are completed, the electric vacuum pump is opened, the value of the vacuum pressure gauge is observed, when the value displayed by the vacuum pressure gauge is reduced to the required interval (≤10 mbar), the electric vacuum pump is closed, at this time, the one-way check valve arranged in the electric vacuum pump starts to work, and the air inlet is automatically closed; after the air source type infinitely constant pressure vacuum brake fluid filling device stands for one minute, it is observed that the value indicated by the vacuum pressure gauge is still within the effective range.

[0023] System oil liquid supplement: the second filling pipeline valve is closed, the liquid filling pipeline valve and the compressed air pipeline valve are sequentially opened, the oil liquid is injected into the liquid storage tank by using the oil gun, and the oil injection amount is 1.2 times the required oil amount; after the filling is completed, the liquid filling pipeline valve and the compressed air pipeline valve are sequentially closed; the compressed air pipeline is connected to the compressed air pipeline valve.

[0024] Filling process: the first vacuum pipeline valve is closed, the second filling pipeline valve is opened, the oil liquid is passively sucked into the required hydraulic system from the liquid storage tank, the compressed air pipeline valve is slowly opened, and the pressure compressed air pressure gauge is observed at the same time, when the pressure reaches 1±0.1 bar, the first filling pipeline valve is opened, the filling pressure gauge is continuously observed to reach the required pressure, and then the compressed air pipeline valve is closed.

[0025] System pressure maintaining process: the filling pressure gauge is continuously observed for one minute, and the system pressure is not lower than the required system pressure, which is qualified for filling.

[0026] After filling, the pressure relief process: close the compressed air pipeline valve, and remove the connected compressed air pipeline; slowly open the compressed air pipeline valve to unload the residual pressure in the liquid tank, and observe the pressure gauge indicating value to 0 bar.

[0027] After the above operation, disconnect the filling pipeline interface from the vehicle body oil pipeline, and complete the system filling.

[0028] Vehicle brake system oil replacement: open the lowest end of the vehicle body brake fluid drain, empty the liquid tank, close the first vacuum pipeline valve in turn, open the second filling pipeline valve, slowly open the compressed air pipeline valve, and observe the pressure value of the compressed air pressure gauge, when it reaches 1±0.1 bar, observe the oil outlet without oil, use compressed air to blow for a certain time, close the oil outlet when there is no oil, and execute the filling process. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the specific embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor. The drawings are used to provide further understanding of the present application, and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application, and do not constitute a limitation on the present application.

[0030] In the drawings:

[0031] Figure 1 The structure diagram of the air source type endless constant pressure vacuum brake fluid filling device provided by the embodiments of the present application.

[0032] In the figure: 1-electric vacuum pump, 2-vacuum static tank, 3-vacuum static tank drain valve, 4-vacuum pressure gauge, 5-first vacuum pipeline valve, 6-second vacuum pipeline valve, 7-filling pressure gauge, 8-first filling pipeline valve, 9-filling pipeline interface, 10-second filling pipeline valve, 11-liquid filling pipeline valve, 12-liquid tank, 13-compressed air pipeline valve, 14-compressed air pressure gauge, 15-first pipeline, 16-second pipeline, 17-third pipeline, 18-fourth pipeline, 19-fifth pipeline, 20-workbench. DETAILED DESCRIPTION

[0033] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present application.

[0034] For the convenience of description, spatial relative terms such as "above", "upper", "top", "up", etc. can be used herein to describe the spatial positional relationship of one device or feature with respect to other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the devices described in the drawings. For example, if the devices in the drawings are inverted, the device described as "above" or "on" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The devices can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0035] It should be noted that the terms used herein are only for the purpose of describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that the terms "comprise" and / or "include" as used in the specification indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0036] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art on a case-by-case basis.

[0037] The present application will be further explained in conjunction with specific embodiments.

[0038] Embodiment one, please refer to Figure 1 The gas source type endless constant pressure vacuum brake fluid filling device provided by the embodiment of the present application comprises:

[0039] A workbench 20, wherein a circuit board is arranged in the workbench 20;

[0040] An electric vacuum pump 1, a vacuum standing tank 2 and a liquid storage tank 12 are arranged on the workbench 20, the electric vacuum pump 1 and the vacuum standing tank 2 are connected through a first pipeline 15, the liquid storage tank 12 and the vacuum standing tank 2 are connected through a second pipeline 16, a liquid discharge assembly is further arranged on the vacuum standing tank 2, and a vacuum pressure display assembly for observing a pressure value is arranged on the second pipeline 16;

[0041] A control valve assembly for controlling the connection state between a filling pipeline interface 9 and the vacuum standing tank 2 and the connection state between the filling pipeline interface 9 and the liquid storage tank 12, wherein the control valve assembly is arranged on the second pipeline 16;

[0042] The filling pipeline interface 9 is connected with the second pipeline 16 through a fifth pipeline 19;

[0043] The liquid discharge assembly comprises a vacuum standing tank liquid discharge valve 3, wherein the vacuum standing tank liquid discharge valve 3 is connected with the vacuum standing tank 2 through a liquid discharge pipeline;

[0044] The vacuum pressure display assembly comprises a vacuum pressure gauge 4, wherein the vacuum pressure gauge 4 is connected with the second pipeline 16 through a third pipeline 17, and a second vacuum pipeline valve 6 is further arranged on the third pipeline 17;

[0045] The control valve assembly comprises a first vacuum pipeline valve 5 and a second filling pipeline valve 10, wherein the first vacuum pipeline valve 5 and the second filling pipeline valve 10 are both arranged on the second pipeline 16;

[0046] The first vacuum pipeline valve 5 and the second filling pipeline valve 10 are respectively located on two sides of the fifth pipeline 19, and the vacuum pressure display assembly is located between the first vacuum pipeline valve 5 and the vacuum standing tank 2.

[0047] Embodiment two, please refer to Figure 1 The gas source type endless constant pressure vacuum brake fluid filling device provided by the embodiment of the present application comprises:

[0048] A workbench 20, wherein a circuit board is arranged in the workbench 20;

[0049] The electric vacuum pump 1, the vacuum static tank 2 and the liquid storage tank 12 are arranged on the workbench 20, the electric vacuum pump 1 is connected with the vacuum static tank 2 through the first pipeline 15, the liquid storage tank 12 is connected with the vacuum static tank 2 through the second pipeline 16, the vacuum static tank 2 is further provided with a liquid discharge assembly, and the second pipeline 16 is provided with a vacuum pressure display assembly for observing the pressure value;

[0050] A control valve assembly for controlling the connection state between the filling pipeline interface 9 and the vacuum static tank 2 and the connection state between the filling pipeline interface 9 and the liquid storage tank 12 is arranged on the second pipeline 16;

[0051] And the filling pipeline interface 9 is connected with the second pipeline 16 through the fifth pipeline 19;

[0052] The liquid discharge assembly comprises a vacuum static tank liquid discharge valve 3 connected with the vacuum static tank 2 through a liquid discharge pipe;

[0053] The vacuum pressure display assembly comprises a vacuum pressure gauge 4 connected with the second pipeline 16 through a third pipeline 17, and the third pipeline 17 is further provided with a second vacuum pipeline valve 6;

[0054] The control valve assembly comprises a first vacuum pipeline valve 5 and a second filling pipeline valve 10, both of which are arranged on the second pipeline 16;

[0055] The first vacuum pipeline valve 5 and the second filling pipeline valve 10 are respectively located on both sides of the fifth pipeline 19, and the vacuum pressure display assembly is located between the first vacuum pipeline valve 5 and the vacuum static tank 2;

[0056] The embodiment of the application further comprises a filling pressure gauge 7 connected with the fifth pipeline 19 through a fourth pipeline 18, and the fourth pipeline 18 is further provided with a first filling pipeline valve 8;

[0057] Further comprising a compressed air pressure gauge 14 for detecting pressure during filling, which is arranged on the liquid storage tank 12;

[0058] The liquid storage tank 12 is further provided with a compressed air pipeline valve 13 and a liquid filling pipeline valve 11.

[0059] Working principle: vacuum pipeline self-checking process: close the first vacuum pipeline valve 5 and vacuum static tank drain valve 3 in turn, and open the second vacuum pipeline valve 6; after the above operation, open the electric vacuum pump 1, observe the value of the vacuum pressure gauge 4, when the vacuum pressure gauge 4 shows that the value is reduced to the required interval (≤10mbar), close the electric vacuum pump 1, at this time the one-way check valve set in the electric vacuum pump 1 starts to work, the air inlet is automatically closed; the air source type stepless constant pressure vacuum brake fluid filling device is static for one minute, and the value indicated by the vacuum pressure gauge 4 is still in the effective range.

[0060] Vacuumizing process: first use the filling pipeline interface 9 to connect with the vehicle body oil storage pipeline, close the second filling pipeline valve 10, the first filling pipeline valve 8 and the vacuum static tank drain valve 3 in turn, and open the first vacuum pipeline valve 5 and the second vacuum pipeline valve 6; after the above operation, open the electric vacuum pump 1, observe the control valve value, when the vacuum pressure gauge 4 shows that the value is reduced to the required interval (≤10mbar), close the electric vacuum pump 1, at this time the one-way check valve set in the electric vacuum pump 1 starts to work, the air inlet is automatically closed; the air source type stepless constant pressure vacuum brake fluid filling device is static for one minute, and the value indicated by the vacuum pressure gauge 4 is still in the effective range.

[0061] System oil storage supplement: close the second filling pipeline valve 10, open the liquid filling pipeline valve 11 and the compressed air pipeline valve 13 in turn, inject oil into the liquid storage tank 12 with the oil gun, and the amount of oil injected is 1.2 times the required amount of oil; after the filling is completed, close the liquid filling pipeline valve 11 and the compressed air pipeline valve 13 in turn; connect the compressed air pipeline to the compressed air pipeline valve 13.

[0062] Filling process: close the first vacuum pipeline valve 5, open the second filling pipeline valve 10, the oil will be passively sucked into the hydraulic system to be filled from the liquid storage tank 12, slowly open the compressed air pipeline valve 13, and at the same time observe the pressure of the compressed air pressure gauge 14, when the pressure reaches 1±0.1bar, open the first filling pipeline valve 8, and continuously observe the filling pressure gauge 7 to reach the required pressure, then close the compressed air pipeline valve 13.

[0063] System pressure maintaining process: continuously observe the filling pressure gauge 7 for one minute, and the system pressure is not lower than the required system pressure, which is qualified for filling.

[0064] Pressure relief process after filling is completed: close the compressed air pipeline valve 13, and remove the connected compressed air pipeline; slowly open the compressed air pipeline valve 13 to unload the residual pressure in the liquid storage tank 12, and observe the value of the compressed air pressure gauge 14 to reduce to 0bar.

[0065] After the above operation, the filling pipe interface 9 is separated from the vehicle body oil pipe, and the system filling is completed.

[0066] Vehicle brake system oil replacement: open the lowest end of the vehicle body brake fluid drain, empty the storage tank 12, close the first vacuum pipe valve 5 in turn, open the second filling pipe valve 10, slowly open the compressed air pipe valve 13, and observe the pressure value of the compressed air pressure gauge 14 at the same time. When it reaches 1±0.1bar, observe the oil outlet without oil removal, use compressed air to blow for a certain time, close the oil outlet when there is no oil removal, and execute the filling process.

[0067] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A gas-source type stepless constant pressure vacuum brake fluid filling device, comprising a workbench (20), wherein a circuit board is provided inside the workbench (20), characterized in that, Also includes: An electric vacuum pump (1), a vacuum settling tank (2), and a liquid storage tank (12) are installed on the workbench (20). The electric vacuum pump (1) and the vacuum settling tank (2) are connected by a first pipeline (15), and the liquid storage tank (12) and the vacuum settling tank (2) are connected by a second pipeline (16). The vacuum settling tank (2) is also equipped with a drain assembly, and the second pipeline (16) is equipped with a vacuum pressure display assembly for observing pressure values. A control valve assembly is used to control the connection status between the filling pipeline interface (9) and the vacuum settling tank (2) and the connection status between the filling pipeline interface (9) and the storage tank (12), the control valve assembly being disposed on the second pipeline (16); And a filling pipeline interface (9), which is connected to the second pipeline (16) through a fifth pipeline (19); A pressure gauge (7) is added, which is connected to a fifth pipeline (19) via a fourth pipeline (18); a first filling pipeline valve (8) is also provided on the fourth pipeline (18). The drain assembly includes a vacuum settling tank drain valve (3), which is connected to the vacuum settling tank (2) via a drain pipe; The vacuum pressure display component includes a vacuum pressure gauge (4), which is connected to the second pipeline (16) through a third pipeline (17), and a second vacuum pipeline valve (6) is also provided on the third pipeline (17). The control valve assembly includes a first vacuum line valve (5) and a second filling line valve (10), both of which are located on the second line (16). The first vacuum line valve (5) and the second filling line valve (10) are located on both sides of the fifth line (19), and the vacuum pressure display component is located between the first vacuum line valve (5) and the vacuum settling tank (2); A compressed air pressure gauge (14) for detecting pressure during the filling process is provided on the liquid storage tank (12); The liquid storage tank (12) is also equipped with a compressed air pipeline valve (13). The liquid storage tank (12) is also equipped with a liquid filling pipeline valve (11). During the self-test of the vacuum pipeline, the first vacuum pipeline valve (5) and the vacuum settling tank drain valve (3) are closed sequentially, while the second vacuum pipeline valve (6) is opened. The electric vacuum pump (1) is turned on, and the value of the vacuum pressure gauge (4) is observed. When the value displayed by the vacuum pressure gauge (4) drops to within the required range, the electric vacuum pump (1) is turned off, and the one-way check valve installed in the electric vacuum pump (1) starts to work, and the air inlet is automatically closed. After settling for one minute, if the value indicated by the vacuum pressure gauge (4) is still within the required range, the self-test of the vacuum pipeline is completed. The required range is less than or equal to 10 mbar. During the vacuuming process, connect the filling pipeline interface (9) to the vehicle body oil storage pipeline, and sequentially close the second filling pipeline valve (10), the first filling pipeline valve (8), and the vacuum settling tank drain valve (3), while simultaneously opening the first vacuum pipeline valve (5) and the second vacuum pipeline valve (6); turn on the electric vacuum pump (1), observe the value of the vacuum pressure gauge (4), and when the value displayed by the vacuum pressure gauge (4) drops to within the required range, turn off the electric vacuum pump (1). At this time, the one-way check valve installed in the electric vacuum pump (1) starts to work, and the air inlet automatically closes; after settling for one minute, observe that the value indicated by the vacuum pressure gauge (4) is still within the required range, then the vacuuming is completed.

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