Automatic equipment testing mechanism for combination valve of automobile fuel tank

Abstract

The utility model belongs to the technical field of testing mechanisms, and discloses an automatic equipment testing mechanism for a combination valve of an automobile fuel tank, which comprises a shell, and a first valve core, a second valve core and a third valve core which are relatively independent are arranged in the shell, penetrate through the peripheral wall of the shell and are respectively used for being connected with corresponding testing pipelines; the first valve element is used for discharging air after oil and air are separated; the second valve element is used for discharging oil steam of an automobile oil tank, and the third valve element is used for collecting oil in the steam in the liquid collector to a certain amount and discharging the oil to flow back to the oil tank again. The first valve element, the second valve element and the third valve element are each provided with a sealing structure. According to the utility model, the three relatively independent valve cores are arranged, so that not only can three groups of oil tank combination valves be tested simultaneously, but also mutual interference is avoided.

Description

Technical Field

[0001] This utility model belongs to the technical field of testing mechanisms, and specifically relates to an automated testing mechanism for automotive fuel tank combination valves. Background Technology

[0002] The fuel tank valve is a crucial component of a vehicle's fuel system. Its primary function is to balance the pressure within the fuel tank, preventing damage to the vehicle from overpressure or vacuum conditions. Most fuel tank valves consist of one or two valve cores, making it impossible to test all three valve combinations simultaneously, which would hinder the testing process. Please refer to [further details omitted]. Figure 1 The diagram shows a conventional oil tank valve test. Conventional oil tank valve testing requires placing the product into a sealed cavity and connecting the test pipeline through a sealing joint and the product's air outlet. The biggest drawback is that the product needs to be placed in a large cavity. A large cavity volume requires a larger cylinder seal, and the rotary drive mechanism will also increase accordingly, resulting in high overall production costs. Utility Model Content

[0003] In order to solve the above-mentioned technical problems, the purpose of this utility model is to provide an automated testing mechanism for automotive fuel tank combination valves.

[0004] This utility model provides an automated testing mechanism for a combination valve in an automotive fuel tank, comprising a housing. Inside the housing are three relatively independent first valve core, second valve core, and third valve core, which penetrate the peripheral wall of the housing and are used to connect to corresponding test pipelines. The first valve core is used to discharge air after oil and air separation. The second valve core is used to discharge oil vapor from the automotive fuel tank. The third valve core is used to collect oil in the vapor and discharge it back to the fuel tank after reaching a certain amount in the liquid collector. The first, second, and third valve cores are all equipped with sealing structures.

[0005] According to this utility model, the housing is further provided with a pressing and sealing cylinder position corresponding to the first valve core and the second valve core; during the test, the pressing and sealing cylinder is connected and a thrust is applied to the corresponding valve core to seal it.

[0006] According to this utility model, the third valve core is further provided with an expansion sealing ring.

[0007] According to this invention, it further includes a pressure sensor for detecting the vacuum pressure of each test pipeline.

[0008] According to this utility model, the positive pressure system pressurizes the third valve core, and two independent vacuum systems evacuate the first and second valve cores.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: by setting three relatively independent valve cores, this utility model can not only test three sets of oil tank combination valves at the same time, but also prevent them from interfering with each other.

[0010] This invention eliminates the testing cavity, simplifies the overall testing mechanism, and allows the equipment to be designed to be smaller, greatly saving costs. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the oil tank valve test in the prior art;

[0012] Figure 2a This is a first-view structural schematic diagram of the testing mechanism for the automated equipment of the automotive fuel tank combination valve of this utility model.

[0013] Figure 2b for Figure 2a A schematic diagram of the cross-sectional structure along direction A;

[0014] Figure 3 This is a second-view structural schematic diagram of the testing mechanism for the automated equipment of the automotive fuel tank combination valve of this utility model.

[0015] Figure 4 This is a third-view structural schematic diagram of the testing mechanism for the automated equipment of the automotive fuel tank combination valve of this utility model;

[0016] Figure 5 This is a schematic diagram showing the usage status of the automated testing mechanism for the automotive fuel tank combination valve of this utility model.

[0017] Figure 6a A flowchart illustrating the testing of the exhaust valve in the automated testing mechanism for the automotive fuel tank combination valve of this utility model.

[0018] Figure 6b This is a flowchart illustrating the testing of an oil-gas mixing valve using an automated testing mechanism for an automotive fuel tank combination valve according to this utility model.

[0019] Figure 6c This is a flowchart illustrating the testing process of the oil drain valve in the automated testing mechanism for the automotive fuel tank combination valve of this utility model.

[0020] The accompanying figure is labeled as follows:

[0021] 100-Housing, 110-First valve core, 120-Second valve core, 130-Third valve core, 200-Pressure sensor, 300-Pressure sealing cylinder, 400-Expansion sealing mechanism. Detailed Implementation

[0022] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of this utility model will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0023] Please see Figures 1 to 6c This embodiment provides an automated testing mechanism for an automotive fuel tank combination valve, including a housing 100. Inside the housing 100 are three relatively independent first valve cores 110, second valve cores 120, and third valve cores 130, which penetrate the periphery of the housing 100 and are used to connect to corresponding test pipelines. The first valve core 110 is an exhaust valve used to discharge air after oil and air are separated. The second valve core 120 is used to discharge oil vapor from the automotive fuel tank. The function of the third valve core 130 is to collect oil in the vapor and discharge it back to the fuel tank after the liquid collector reaches a certain amount. The housing 100 is equipped with a pressing and sealing cylinder position corresponding to the first valve core 110 and the second valve core 120. During the test, the pressing and sealing cylinder 300 is connected to apply a thrust to the corresponding valve core to seal it. The third valve core 130 is equipped with an expansion sealing ring 400. The expansion sealing ring 400 expands when it comes into contact with oil, thereby providing a better sealing effect for the third valve core 130. Each valve core is equipped with a sealing mechanism to meet the sealing requirements of the three valve cores during the test.

[0024] In order to improve the monitoring of the pressure of the corresponding test pipeline during the test, pressure sensors 200 are installed to monitor the vacuum pressure of the corresponding test pipeline.

[0025] The testing process for this utility model is as follows:

[0026] 1. Place the product into the tooling;

[0027] 2. The translation cylinder carries the product into the test area;

[0028] 3. The third valve core 130 is tightened and sealed, while the first valve core 110 and the second valve core 120 are automatically pressed and sealed by a sealing cylinder; the third valve core 130 is sealed by an expansion sealing rubber ring 400.

[0029] 4. The positive pressure system pressurizes the third valve core 130 (LVSDV Drain valve core), while two independent vacuum systems evacuate the first valve core 110 (LVSDV Main valve core) and the second valve core 120 (FLVV valve core); 5. The positive pressure testing system monitors the pressure of the positive pressure system, and two negative pressure testing systems monitor the pressure of vacuum systems B and C; The positive pressure system and vacuum system are existing technologies and will not be described in detail here; 6. Once the pressure reaches the required test range, the system's large flow meter reads the product's flow rate, and the system determines whether the product's flow rate is qualified based on the flow rate range.

[0030] 7. After the flow test is completed, the entire product fixture is rotated 180°. After being rotated into place, the three valve cores of the product are in a sealed state.

[0031] 8. The three test systems were readjusted. Once the pressure stabilized and met the test conditions, the valves were closed to keep the system under pressure.

[0032] 9. Hold the pressure for 5 seconds, then switch the pipeline to a small flow meter. Once the flow rate stabilizes, read the value and determine whether the product leakage meets the requirements based on the flow range.

[0033] 10. After the test is completed, the entire product fixture is rotated 0° to the loading position;

[0034] 11. The tensioning mechanism and sealing cylinder disengage from the housing 100, and the translation cylinder transports the testing mechanism back to the loading position;

[0035] 12. Automatically remove the product and place it into the corresponding qualified or unqualified material channel according to the test results.

[0036] The above description is only a description of the preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. An automated testing mechanism for an automotive fuel tank combination valve, characterized in that, The device includes a housing, inside which are three relatively independent valve cores—a first valve core, a second valve core, and a third valve core—that penetrate the housing's peripheral wall and are used to connect to corresponding test pipelines. The first valve core is used to discharge air after oil and air are separated. The second valve core is used to discharge oil vapor from the vehicle's fuel tank. The third valve core is used to collect oil in the vapor and discharge it back to the fuel tank after a certain amount has been reached in the liquid collector. All three valve cores are equipped with sealing structures.

2. The automated testing mechanism for automotive fuel tank combination valves as described in claim 1, characterized in that, The housing is equipped with a pressing and sealing cylinder station corresponding to the first valve core and the second valve core; during the test, the pressing and sealing cylinder is connected, and a thrust is applied to the corresponding valve core to seal it.

3. The automated testing mechanism for automotive fuel tank combination valves as described in claim 1 or 2, characterized in that, The third valve core is equipped with an expansion sealing ring.

4. The automated testing mechanism for automotive fuel tank combination valves as described in claim 1, characterized in that, It also includes pressure sensors to detect the vacuum pressure in each test pipeline.

5. The automated testing mechanism for automotive fuel tank combination valves as described in claim 1, characterized in that, The positive pressure system pressurizes the third valve core, while two independent vacuum systems evacuate the first and second valve cores.

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