Device and method for testing closing height of valve body of hybrid fuel tank

Abstract

The invention discloses a hybrid fuel tank valve body closing height test device and test method, and relates to the technical field of fuel tank valves of fuel vehicles or hybrid vehicle fuel systems, and the hybrid fuel tank valve closing height test device comprises a support frame, and a liquid storage tank, a gas flow table and a test box used for simulating a real vehicle sealing environment which are installed on the support frame; test liquid is stored in the liquid storage box, a liquid conveying pipeline is communicated between the liquid storage box and the test box, and a pumping assembly for quantitatively conveying the test liquid is arranged on the liquid conveying pipeline; the gas flow table is communicated with the test box and quantitatively inputs required gas into the test box; a to-be-tested valve body is arranged at the top end inside the test box, the test box is provided with a liquid level sensor and a pressure sensor which are used for monitoring the liquid level and the pressure inside the test box respectively, and the pressure sensor is in electric control connection with the pumping assembly, so that the manpower part needed in the test is simplified, and the influence of subjective factors on the test is reduced; the stability and reproducibility of a test result are improved, the test efficiency is improved, and human resources are saved.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel tank valves for fuel vehicles or hybrid vehicles, and particularly to a test device and test method for the closing height of a hybrid fuel tank valve body. Background Art

[0002] For the fuel gauge and fuel tank, the relationship between fuel volume and liquid level closing height is a key parameter. The liquid level float in the fuel tank senses the liquid level height and inputs the resistance value to the fuel gauge through the liquid level sensor. The fuel gauge displays the fuel quantity according to the resistance value. Therefore, the relationship curve between fuel volume and liquid level height is the key input for the fuel gauge display, and its accuracy directly affects the accuracy of the fuel gauge display.

[0003] In the prior art, a measuring cup with a fixed range is manually used to add the test liquid into the fuel tank to meet the requirement of test flow rate, and the rising of the liquid is observed with the naked eye. When the test liquid reaches the requirement of nozzle shut-off, the addition of the test liquid is manually stopped, resulting in a certain error in time; after the test, the closing height of the fuel valve needs to be read, and it is read by the way of drawing a line with a ruler. Both the ruler drawing and the naked-eye reading have errors and large fluctuations; and after the test, the test liquid needs to be poured from the fuel tank into an oil barrel for storage, which is time-consuming and laborious and prone to loss; generally speaking, in the prior art, most of the tests rely on manual testing. The whole test process is relatively cumbersome. When there are many test samples, it is extremely time-consuming, delaying the test progress, and the test results are greatly affected by subjective factors. The test results of different test engineers vary greatly and are difficult to reproduce. Summary of the Invention

[0004] The purpose of the present invention is to provide a test device and test method for the closing height of a hybrid fuel tank valve body to solve the problems existing in the prior art, simplify the human labor part required in the test, reduce the influence of subjective factors on the test, improve the stability and reproducibility of the test results, improve the test efficiency, and save human resources.

[0005] To achieve the above purpose, the present invention provides the following solution: The present invention provides a test device for the closing height of a hybrid fuel tank valve body, including a support frame and a liquid storage tank, a gas flow bench and a test box for simulating the sealed environment of an actual vehicle, which are installed on the support frame;

[0006] The liquid storage tank stores the test liquid, and a liquid delivery pipeline is connected between the liquid storage tank and the test box. A pumping assembly for quantitatively delivering the test liquid is arranged on the liquid delivery pipeline;

[0007] The gas flow bench is connected to the test box and quantitatively inputs the required gas into the test box;

[0008] At the top inner position of the test chamber, there is a valve body to be tested. At the top position of the test chamber, there is a ventilation opening. The valve body to be tested is used to block the ventilation opening after reaching the closing height. And the test chamber is equipped with a liquid level sensor and a pressure sensor for monitoring the liquid level and pressure inside it respectively. The pressure sensor is electrically connected to the pumping assembly.

[0009] Preferably, at the top position of the test chamber, there is an installation opening. A sealing tooling is installed at the installation opening. The valve body to be tested is installed on the sealing tooling and extends into the test chamber along with the sealing tooling. And the ventilation opening is arranged on the sealing tooling.

[0010] Preferably, the pumping assembly includes a delivery pump and a first flow regulating valve. Both the delivery pump and the first flow regulating valve are installed on the liquid delivery pipeline. And the delivery pump is electrically connected to the pressure sensor.

[0011] Preferably, the pumping assembly further includes a first flow sensor, and the first flow sensor is installed on the liquid delivery pipeline.

[0012] Preferably, the gas flow bench includes a gas source mechanism and a gas transmission pipeline connecting the gas source mechanism and the test chamber. A second flow regulating valve is arranged on the gas transmission pipeline.

[0013] Preferably, the gas flow bench further includes a second flow sensor, and the second flow sensor is installed on the gas transmission pipeline.

[0014] Preferably, a control panel is further installed on the support frame. Both the first flow regulating valve and the second flow regulating valve are of an electrically controlled valve structure. The control panel is provided with an adjusting part for adjusting the first flow regulating valve and the second flow regulating valve. And the adjusting part is electrically connected to both the first flow regulating valve and the second flow regulating valve.

[0015] Preferably, the control panel is provided with a display screen for displaying pressure information, flow information and liquid level information. And the display screen is electrically connected to the first flow sensor, the second flow sensor, the pressure sensor and the liquid level sensor.

[0016] Preferably, the liquid storage tank is located below the test chamber. And the liquid storage tank and the test chamber are connected by a liquid discharge pipeline. A drain valve is arranged on the liquid discharge pipeline.

[0017] A test method for a test device for closing height of a hybrid fuel tank valve body is also provided, including the following steps:

[0018] S1. Install the valve body to be tested on the sealing tooling, and install the sealing tooling at the installation opening of the test chamber. The valve body to be tested extends into the test chamber along with the sealing tooling and is located at the top position of the test chamber;

[0019] S2. Connect the gas source mechanism to the test chamber through an air delivery pipeline, and adjust the gas flow rate by means of a second flow regulating valve in cooperation with a second flow sensor;

[0020] S3. Connect the test chamber and the liquid storage tank through an infusion pipeline. Extract the test liquid from the liquid storage tank into the test chamber by means of a delivery pump, and adjust the flow rate of the test liquid by means of a first flow regulating valve in cooperation with a first flow sensor;

[0021] S4. Start the test. When the test liquid level reaches the closing height of the valve body to be tested, the internal pressure of the test chamber increases and is fed back to the control panel through a pressure sensor. The delivery pump stops working, and the test ends. Read the liquid level height on the control panel and record the data;

[0022] S5. After the test ends, open the oil drain valve, and the test liquid is re-stored from the test chamber into the liquid storage tank for reuse in the next test.

[0023] The present invention has achieved the following technical effects compared with the prior art:

[0024] The present invention monitors the air pressure condition in the test chamber through a pressure sensor. When the trigger pressure (liquid level closing height) is reached, the device will automatically close the pumping assembly and stop the supply of the test liquid, so as to replace the manual stop method in the prior art. And after stopping the supply of the test liquid, the liquid level height is read through a liquid level sensor, without the need for manual reading by means of ruler scribing. The combination of the pressure sensor and the liquid level sensor can fully improve the test accuracy, greatly reduce the influence of subjective factors, and improve the stability and reproducibility of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is a schematic diagram of the overall structure of the test equipment for the closing height of the hybrid fuel tank valve body disclosed in the present invention;

[0027] Figure 2 is Figure 1 an enlarged view of the bottom position;

[0028] Among them, 1 - liquid storage tank, 2 - delivery pump, 3 - first flow regulating valve, 4 - first flow sensor, 5 - test box, 6 - pressure sensor, 7 - control panel, 8 - sealing tooling, 9 - control switch, 10 - second flow sensor, 11 - second flow regulating valve, 12 - oil drain valve, 13 - support frame, 14 - gas flow bench. Specific implementation manner

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] The purpose of the present invention is to provide a test device and test method for the closing height of a hybrid fuel tank valve body, so as to solve the problems existing in the prior art, simplify the manpower required in the test, reduce the influence of subjective factors on the test, improve the stability and reproducibility of the test results, improve the test efficiency, and save human resources.

[0031] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0032] Such as Figures 1 to 2As shown in the figure, this embodiment provides a test device for the closing height of a hybrid fuel tank valve body, which includes a support frame 13, a liquid storage tank 1, a gas flow bench 14 and a test chamber 5 installed on the support frame 13 for simulating the sealed environment of a real vehicle. The liquid storage tank 1 stores a test liquid. There is an infusion pipeline connected between the liquid storage tank 1 and the test chamber 5, and a pumping assembly for quantitatively transporting the test liquid is provided on the infusion pipeline. The gas flow bench 14 is connected to the test chamber 5 and quantitatively inputs the required gas into the test chamber 5. At the top inner position of the test chamber 5, there is a valve body to be tested. At the top position of the test chamber, there is a ventilation opening. The valve body to be tested is used to block the ventilation opening after reaching the closing height. The valve body to be tested is a fuel level limit valve, a rollover valve, a stop valve or a fuel tank float valve, etc. that need to be detected. In a real vehicle, the valve body to be tested is fixedly welded in the fuel tank and is located at the top position of the fuel tank. Taking the fuel tank float valve as an example, when the ventilation opening is in the open state, the liquid level of the test liquid in the test chamber is low, the float sinks, the lever arm is released, the ventilation opening is open, and air circulates freely. When the ventilation opening is in the closed state, the liquid level of the test liquid in the test chamber rises to the set height, the float pushes the lever arm, and the valve seat presses tightly against the ventilation opening to cut off the air passage. And the test chamber 5 is equipped with a liquid level sensor and a pressure sensor 6 for monitoring its internal liquid level and pressure respectively. The pressure sensor 6 is electrically connected to the pumping assembly. In the present invention, the air pressure condition in the test chamber 5 is monitored by the pressure sensor 6. Then, in the specific test process, since there is an infusion pipeline connected between the liquid storage tank and the test chamber 5, and a pumping assembly for quantitatively transporting the test liquid is provided on the infusion pipeline, the test liquid in the liquid storage tank is pumped into the test chamber 5 by the pumping assembly. When the liquid level height in the test chamber 5 reaches the closing height of the valve body to be tested, the valve body to be tested blocks the ventilation opening, making the test chamber 5 completely in a sealed state. During the continuous operation of the pumping assembly, the air pressure in the test chamber 5 instantaneously increases and quickly reaches the nozzle shut-off pressure. Then, the air pressure condition in the test chamber 5 is monitored by the pressure sensor 6. When the nozzle shut-off pressure (liquid level closing height) is reached, since the pressure sensor 6 is electrically connected to the pumping assembly, the control system judges that the pumping assembly needs to be closed after obtaining the pressure value, and issues an instruction to the pumping assembly to make the pumping assembly close and stop the supply of the test liquid, so as to be able to replace the manual stop method in the prior art. And after stopping the supply of the test liquid, the liquid level height is read through the liquid level sensor, without the need for manual measurement by drawing a line with a ruler. The combination of the pressure sensor 6 and the liquid level sensor can fully improve the test accuracy, greatly reduce the influence of subjective factors, and improve the stability and reproducibility of the test results.

[0033] In this embodiment, the test liquid generally uses a liquid with relatively low volatility. However, during the actual refueling process, gasoline or fuel has a large volatility, and the airflow change in the fuel tank is also relatively large. Therefore, in order to better simulate the actual working conditions of vehicle refueling, the gas flow bench 14 is connected to the test chamber 5, and the required gas is quantitatively input into the test chamber 5 to increase the airflow change in the test chamber 5, making it closer to the actual refueling working conditions.

[0034] In this embodiment, the highest liquid level of the test liquid is read by the liquid level sensor, and the closing height is the difference between the height of the inner cavity of the test chamber and the highest liquid level.

[0035] In a specific embodiment, an installation opening is provided at the top position of the test chamber 5, and a sealing tooling 8 is installed at the installation opening. Through the installation opening, it is convenient to install the liquid level sensor and the valve body to be tested into the test chamber 5. And the sealing tooling 8 has a sealing cover structure. After installing the liquid level sensor and the valve body to be tested and other mechanisms, the installation opening is sealed by the sealing tooling 8, thereby simulating the closed environment in the actual vehicle fuel tank. Among them, the valve body to be tested is installed on the sealing tooling 8 and extends into the test chamber 5 along with the sealing tooling 8, so as to facilitate the installation of the valve body to be tested into the test chamber 5 and ensure its installation position, avoiding installing the valve body to be tested in the test chamber 5, which is likely to damage the closed structure of the test chamber 5 and is not convenient for replacing the valve body to be tested. Preferably, the valve body to be tested is detachably installed on the sealing tooling 8, and preferably, snap connection or bolt connection and other methods are used. And the ventilation opening is provided on the sealing tooling. When the liquid level closing height is reached, when the valve body to be tested acts, it directly blocks the ventilation opening on the sealing tooling. And by providing the ventilation opening on the sealing tooling, it is avoided to open holes in the test chamber, thereby reducing the risk of damage to the test chamber and ensuring that the test chamber can be used for a long time.

[0036] In a specific embodiment, the pumping assembly includes a delivery pump 2 and a first flow regulating valve 3. The delivery pump 2 and the first flow regulating valve 3 are both installed on the liquid delivery pipeline. By starting the delivery pump 2, the test liquid in the liquid storage tank 1 is pumped into the test chamber 5, and the flow rate on the liquid delivery pipeline is adjusted and stabilized by the first flow regulating valve 3, thereby realizing the adjustment of the amount of test liquid pumped into the test chamber 5 per unit time, that is, the flow rate of the test liquid entering the test chamber 5. And the delivery pump 2 is electrically connected to the pressure sensor 6 to monitor the air pressure condition in the test chamber 5 by the pressure sensor 6. When the gun-jumping pressure (liquid level closing height) is reached, after the pressure sensor 6 obtains the corresponding pressure signal, it is fed back to the control system, and the control system controls the delivery pump 2 to stop running.

[0037] In a specific embodiment, the pumping assembly further includes a first flow sensor 4. The first flow sensor 4 is installed on the liquid delivery pipeline, and the flow rate of the test liquid in the liquid delivery pipeline is monitored in real time by the first flow sensor 4.

[0038] In a specific embodiment, to further improve the accuracy of simulating the evaporation conditions of gasoline and the like in the simulated fuel tank, the gas flow bench 14 includes a gas source mechanism and a gas transmission pipeline connecting the gas source mechanism and the test chamber 5. A second flow regulating valve 11 is provided on the gas transmission pipeline. The required gas is supplied into the test chamber 5 through the gas source mechanism and the gas transmission pipeline to meet the test requirements, and the flow rate of the required gas is regulated and stabilized by the second flow regulating valve 11. Preferably, a quick socket is provided on the test chamber 5, and the gas transmission pipeline adopts a flexible pipe structure and is hermetically inserted at the quick socket to complete the connection between the gas transmission pipeline and the test chamber 5.

[0039] In a specific embodiment, the gas flow bench 14 further includes a second flow sensor 10. The second flow sensor 10 is installed on the gas transmission pipeline, and the flow rate of the gas in the gas transmission pipeline is monitored in real time through the second flow sensor 10.

[0040] In a specific embodiment, a control panel 7 is further installed on the support frame 13. The first flow regulating valve 3 and the second flow regulating valve 11 are both of an electrically controlled valve structure. The control panel 7 is provided with an adjusting part for adjusting the first flow regulating valve 3 and the second flow regulating valve 11, and the adjusting part is electrically connected to both the first flow regulating valve 3 and the second flow regulating valve 11, so as to electrically control and adjust the first flow regulating valve 3 and the second flow regulating valve 11 through the adjusting part, and further adjust the flow rates of the test liquid and the gas entering the test chamber 5. Preferably, the adjusting part adopts a touch screen button or a hard key button, etc., so as to realize the adjustment of the flow rates of the test liquid and the gas by operating the touch screen button or the hard key button. And preferably, a control switch 9 electrically connected to the control panel 7 is further installed on the support frame 13. The control switch 9 includes an on switch and an emergency stop switch, so as to be able to quickly start the test and abort the test.

[0041] In a specific embodiment, the control panel 7 is provided with a display screen for displaying pressure information, flow rate information and liquid level information, and the display screen is electrically connected to the first flow sensor 4, the second flow sensor 10, the pressure sensor 6 and the liquid level sensor, so as to be able to display the flow rates in the liquid transmission pipeline and the gas transmission pipeline, the pressure and the liquid level in the test chamber 5 in real time through the display screen, and further facilitate the technicians in this field to directly obtain the corresponding parameter information.

[0042] In a specific embodiment, the liquid storage tank 1 is located below the test chamber 5, and the liquid storage tank 1 and the test chamber 5 are connected by a liquid discharge pipeline. A drain valve 12 is provided on the liquid discharge pipeline. After the test is completed, by opening the drain valve 12, the test chamber 5 and the liquid storage tank 1 are connected. And because the liquid storage tank 1 is located below the test chamber 5, the test liquid in the test chamber 5 flows through the liquid discharge pipeline and is guided into the liquid storage tank 1 under the action of its own weight, so as to re-preserve and use the test liquid.

[0043] Furthermore, a testing method is provided, comprising the following steps:

[0044] S1. Install the valve body to be tested on the sealing tool 8, and install the sealing tool 8 at the installation port of the test box 5. The valve body to be tested extends into the test box 5 along with the sealing tool 8 and is located at the top of the test box 5, so that the valve body to be tested can be installed and the installation port can be sealed by the sealing tool 8, simulating the installation state of a real vehicle;

[0045] S2, connecting the gas source mechanism to the test box 5 through the gas pipeline, and adjusting the gas flow rate through the second flow control valve 11 in cooperation with the second flow sensor 10, so that the gas flow rate in the test box 5 meets the test standard requirements;

[0046] S3, connecting the test box 5 and the liquid storage tank 1 through the infusion pipeline, pumping the test liquid from the liquid storage tank 1 to the test box 5 through the delivery pump 2, and adjusting the flow rate of the test liquid through the first flow regulating valve 3 and the first flow sensor 4, so that the flow rate of the test liquid meets the test standard requirements;

[0047] S4, start the test. When the test liquid level reaches the closing height of the valve body to be tested, the internal pressure of the test box 5 increases and is fed back to the control panel 7 through the pressure sensor 6. The delivery pump 2 stops working, the test ends, and the liquid level height on the control panel 7 is read and the data is recorded. Specifically, the control panel 7 is provided with an adjustment part and a display screen, and the flow rate of the test liquid and gas in the liquid delivery pipeline and the gas delivery pipeline is displayed on the display screen. After the parameters required for the test (the flow rate of the test liquid and gas) are set through the adjustment part, the test is started.

[0048] S5. After the test is finished, the oil drain valve 12 is opened, and the test liquid is stored from the test box 5 back into the liquid storage tank 1 for reuse in the next test.

[0049] Adaptive changes made according to actual needs are all within the protection scope of the present invention.

[0050] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numerals in the claims should not be regarded as limiting the claims involved.

[0051] In the present invention, specific examples are used to illustrate the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation on the present invention.

Claims

1. A hybrid fuel tank valve body closing height test device, characterized in that: It includes a support frame, a liquid storage tank installed on the support frame, a gas flow table and a test box for simulating the sealing environment of a real vehicle; The liquid storage tank stores a test liquid, a liquid infusion pipeline is connected between the liquid storage tank and the test box, and a pumping component for quantitatively transporting the test liquid is provided on the liquid infusion pipeline; The gas flow table is connected to the test box and quantitatively inputs the required gas into the test box; A valve body to be tested is provided at the top position of the interior of the test box, and a vent is provided at the top position of the test box. The valve body to be tested is used to seal the vent after reaching the closing height, and the test box is equipped with a liquid level sensor and a pressure sensor for monitoring the internal liquid level and pressure respectively, and the pressure sensor is electrically connected to the pumping assembly.

2. The hybrid fuel tank valve body closing height test equipment according to claim 1, characterized in that: The top of the test box is provided with an installation opening, a sealing tool is installed at the installation opening, the valve body to be tested is installed on the sealing tool and extends into the test box along with the sealing tool, and the ventilation opening is provided on the sealing tool.

3. The hybrid fuel tank valve body closing height test device according to claim 1 or 2, characterized in that: The pumping assembly includes a delivery pump and a first flow regulating valve. The delivery pump and the first flow regulating valve are both installed on the infusion pipeline, and the delivery pump is electrically connected to the pressure sensor.

4. The hybrid fuel tank valve body closing height test device according to claim 3, characterized in that: The pumping assembly further comprises a first flow sensor, which is mounted on the infusion pipeline.

5. The hybrid fuel tank valve body closing height test device according to claim 4, characterized in that: The gas flow table comprises a gas source mechanism and a gas pipeline connecting the gas source mechanism and the test box, and a second flow regulating valve is arranged on the gas pipeline.

6. The hybrid fuel tank valve body closing height test device according to claim 5, characterized in that: The gas flow table further includes a second flow sensor, which is installed on the gas pipeline.

7. The hybrid fuel tank valve body closing height test device according to claim 6, characterized in that: A control panel is also installed on the support frame. The first flow regulating valve and the second flow regulating valve are both electrically controlled valve structures. The control panel is provided with an adjustment part for adjusting the first flow regulating valve and the second flow regulating valve, and the adjustment part is electrically connected to the first flow regulating valve and the second flow regulating valve.

8. The hybrid fuel tank valve body closing height test device according to claim 7, characterized in that: The control panel is provided with a display screen for displaying pressure information, flow information and liquid level information, and the display screen is electrically connected to the first flow sensor, the second flow sensor, the pressure sensor and the liquid level sensor.

9. The hybrid fuel tank valve body closing height test device according to claim 1, characterized in that: The liquid storage tank is located below the test box, and the liquid storage tank and the test box are connected via a drainage pipe, and an oil drain valve is provided on the drainage pipe.

10. A testing method using the hybrid fuel tank valve body closing height testing device according to any one of claims 1 to 9, characterized in that: The steps include: S1. Install the valve body to be tested on the sealing tool, and install the sealing tool at the installation opening of the test box. The valve body to be tested extends into the test box along with the sealing tool and is located at the top end of the test box. S2, connecting the gas source mechanism to the test box through a gas pipeline, and adjusting the gas flow rate through a second flow regulating valve in cooperation with a second flow sensor; S3, connecting the test box and the liquid storage tank through a liquid infusion pipeline, pumping the test liquid from the liquid storage tank into the test box through a delivery pump, and adjusting the flow rate of the test liquid through a first flow regulating valve in cooperation with a first flow sensor; S4, opening test, when the test liquid level reaches the closing height of the valve body to be tested, the internal pressure of the test box increases, and is fed back to the control panel through the pressure sensor, the delivery pump stops working, the test ends, the liquid level height on the control panel is read, and the data is recorded; S5. After the test is finished, the oil drain valve is opened, and the test liquid is stored back into the liquid storage tank from the test box to facilitate reuse in the next test.

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