Device for testing the air tightness of a motor vehicle tank

Abstract

The utility model discloses an airtightness inspection device of automobile oil tank relates to automobile oil tank processing technical field, this airtightness inspection device of automobile oil tank, including the water immersion tank, the front end surface of water immersion tank is fixedly connected with the current -collecting seat of internal hollow structure, the front end surface of current -collecting seat is fixedly connected with the telescopic pipe of telescopic structure, the utility model discloses through the collaborative operation of servo push rod, moving part, connecting frame and pressing plate, the pressure cover action of oil tank is automatically completed, only needs to operate control button and starts relevant component, can realize detection process, greatly reduces manpower input, and lets the worker to be relieved from the heavy physical labor, and the detection efficiency also obtains the remarkable promotion, can complete more oil tank's detection task in shorter time.

Description

Technical Field

[0001] This utility model relates to the field of automotive fuel tank processing technology, specifically to an airtightness testing device for automotive fuel tanks. Background Technology

[0002] The airtightness of a car's fuel tank is crucial for safe driving and fuel economy. An airtight fuel tank can lead to fuel leaks, wasting fuel and posing serious safety hazards such as fires. Therefore, airtightness testing of fuel tanks is necessary during car manufacturing and maintenance.

[0003] Regarding the aforementioned technologies, the inventors believe that the following defects exist: Existing methods for testing the airtightness of automotive fuel tanks mostly involve manually inflating the fuel tank and pressing it into a body of water for testing. However, this manual pressing method is not only inefficient but also requires repeatedly overcoming the effects of the water, increasing labor intensity. Therefore, we have proposed an airtightness testing device for automotive fuel tanks to solve the above-mentioned problems. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides an airtightness testing device for automobile fuel tanks. This solves the problem that existing methods mostly involve manually inflating the fuel tank and pressing it into water for testing. However, this manual pressing method is not only inefficient but also requires repeatedly overcoming the effects of water, increasing labor intensity.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: an airtightness testing device for automobile fuel tank, including a water immersion tank, wherein a hollow internal structure manifold is fixedly connected to the front end face of the water immersion tank, and a telescopic tube with a telescopic structure is fixedly connected to the front end face of the manifold. The front end of the telescopic tube is fixedly connected to a baffle assembly with a circular cross-section; The front end of the baffle assembly is fixedly connected to an insertion tube, and an annular airbag assembly is sleeved on the outside of the insertion tube. The front end of the immersion tank is fixedly connected in a linear array with air supply component A and air supply component B. The front ends of air supply component A and air supply component B are respectively fixedly connected with air supply pipe A and air supply pipe B.

[0006] Preferably, the air supply pipe A is used to inflate the inside of the manifold, and the air supply pipe B is used to inflate the inside of the airbag assembly.

[0007] Preferably, the bottom surface of the immersion tank has two protruding support legs fixedly connected in a straight line array, and the right side of the immersion tank is fixedly connected to a drain pipe.

[0008] Preferably, a control valve is fixedly connected to the outside of the drain pipe, and longitudinally arranged guide rail mechanisms are fixedly connected to both the left and right sides of the immersion tank.

[0009] Preferably, the guide rail mechanism has a longitudinally arranged servo push rod fixedly connected inside, and a movable part is fixedly connected to the top of the servo push rod.

[0010] Preferably, the movable component is arranged longitudinally, and there are two movable components, with a slider fixedly connected to the outer side of each movable component.

[0011] Preferably, the top ends of the two movable parts are fixedly connected to a connecting frame, and the bottom end of the connecting frame is fixedly connected to a pressure plate for pressing the oil tank. Beneficial effects

[0012] This utility model provides a device for testing the airtightness of automotive fuel tanks. Compared with the prior art, it has the following advantages: The airtightness testing device for automobile fuel tanks automatically completes the pressing action of the fuel tank through the coordinated operation of servo push rods, moving parts, connecting frames and pressure plates. The testing process can be realized simply by operating the control button to start the relevant components, which greatly reduces the input of manpower and frees workers from heavy physical labor. At the same time, the testing efficiency is also significantly improved, and more fuel tanks can be tested in a shorter time.

[0013] The gas tightness testing device for automotive fuel tanks utilizes an airbag assembly. After inflation through the air supply pipe B, it precisely seals the fuel tank filler neck, effectively preventing gas leakage during testing and ensuring a stable testing environment. The inflation process from the air supply pipe A into the fuel tank is stable and controllable, providing reliable pressure conditions for testing. Testing in a water immersion tank allows for direct observation of even the smallest leaks in the fuel tank. Any gas leak will produce bubbles, making it more accurate than manual testing. This effectively prevents fuel tanks with gas tightness issues due to inaccurate testing from entering the market, ensuring safe driving and fuel economy for automobiles. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the axial side view of the airtightness testing device of this utility model; Figure 2 This is a schematic diagram of the right side view of the airtightness testing device of this utility model; Figure 3 This is a schematic diagram of the combined structure of the connecting frame and pressure plate of the airtightness testing device of this utility model; Figure 4 This is a top view of the airtightness testing device of this utility model; Figure 5 This is a schematic diagram of the left side of the airtightness testing device of this utility model; Figure 6This is a front view structural diagram of the airtightness testing device of this utility model.

[0015] In the diagram: 1. Immersion tank; 101. Support leg; 1011. Drain pipe; 1012. Control valve; 2. Guide rail mechanism; 201. Servo push rod; 2011. Moving part; 2012. Slider; 2013. Connecting frame; 2014. Pressure plate; 3. Collector seat; 301. Telescopic pipe; 3011. Baffle assembly; 3012. Airbag assembly; 3013. Insertion tube; 3014. Air supply assembly A; 3015. Air supply pipe A; 3016. Air supply assembly B; 3017. Air supply pipe B. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figures 1-6 The present invention provides a technical solution: an airtightness testing device for automobile fuel tank, including a water immersion tank 1, a hollow internal structure manifold 3 fixedly connected to the front end face of the water immersion tank 1, and a telescopic tube 301 with a telescopic structure fixedly connected to the front end face of the manifold 3. The front end of the telescopic tube 301 is fixedly connected to a baffle assembly 3011 with a circular cross section; The front end of the baffle assembly 3011 is fixedly connected to the insertion tube 3013, and the outer side of the insertion tube 3013 is fitted with an annular airbag assembly 3012. Air supply components A3014 and B3016 are fixedly connected in a straight array on the front end face of the immersion tank 1. Air supply pipes A3015 and B3017 are fixedly connected to the front ends of air supply components A3014 and B3016 respectively. The water tank 1 is connected to the manifold 3, the manifold 3 is connected to the telescopic tube 301, the front end of the telescopic tube 301 is connected to the baffle assembly 3011, the insertion tube 3013 and the airbag assembly 3012, and the air supply assembly A3014, the air supply assembly B3016 and their corresponding air supply pipes A3015 and B3017 are set at the front end of the water tank 1 to realize the preliminary connection preparation for the inflation and testing of the car fuel tank, and to provide the basic structure for subsequent testing.

[0018] See Figure 1 , Figure 5 Air supply pipe A3015 is used to inflate the inside of the manifold 3, and air supply pipe B3017 is used to inflate the inside of the airbag assembly 3012. By inflating the manifold 3 with air supply pipe A3015 and the airbag assembly 3012 with air supply pipe B3017, the airbag assembly 3012 can expand and seal the oil tank opening. At the same time, the oil tank is filled with test gas, which facilitates subsequent observation of whether the oil tank is leaking and ensures the sealing and accuracy of the test process.

[0019] See Figure 3 , Figure 4 Two protruding support legs 101 are fixedly connected in a straight line array on the bottom surface of the immersion tank 1, and a drain pipe 1011 is fixedly connected to the right side of the immersion tank 1. The support legs 101 at the bottom of the immersion tank 1 serve to support the device and make it stable; the drain pipe 1011 on the right side of the immersion tank 1 is used to drain the liquid in the tank, which is convenient for cleaning after testing and to maintain the normal operation of the device.

[0020] See Figure 1 , Figure 2 A control valve 1012 is fixedly connected to the outside of the drain pipe 1011, and a longitudinally arranged guide rail mechanism 2 is fixedly connected to both the left and right sides of the immersion tank 1. The opening and closing of the drain pipe 1011 can be controlled by the control valve 1012 on the outside of the drain pipe 1011, which facilitates the control of liquid discharge; the guide rail mechanism 2 on both sides of the immersion tank 1 provides a moving track for subsequent moving parts such as the moving part 2011, ensuring the smooth progress of the testing operation.

[0021] See Figure 5 , Figure 6 The guide rail mechanism 2 has a longitudinally arranged servo push rod 201 fixedly connected inside, and a moving part 2011 is fixedly connected to the top of the servo push rod 201. The servo push rod 201 inside the guide rail mechanism 2 drives the top moving part 2011 to move longitudinally on the guide rail mechanism 2, which can adjust the height position of the moving part 2011, thereby realizing the adjustment of the height of the pressure plate 2014 to meet the needs of oil tank detection at different heights.

[0022] See Figure 1 , Figure 2 The movable component 2011 is arranged longitudinally, and there are two movable components 2011. The outer side of each movable component 2011 is fixedly connected to a slider 2012. The two longitudinally arranged moving parts 2011 are connected to the sliders 2012 on their outer sides. The sliders 2012 cooperate with the guide rail mechanism 2 to make the movement of the moving parts 2011 more stable and smooth, ensuring that the pressure plate 2014 can stably press the oil tank during the testing process.

[0023] See Figure 4 , Figure 6The top ends of the two movable parts 2011 are fixedly connected to the connecting frame 2013, and the bottom end of the connecting frame 2013 is fixedly connected to the pressure plate 2014 for pressing the oil tank. The connecting frame 2013 is connected to the top of the two moving parts 2011, and the pressure plate 2014 is connected to the bottom of the connecting frame 2013. The power of the servo push rod 201 can be transmitted to the pressure plate 2014. The pressure plate 2014 presses the oil tank, realizing the automated operation of immersing the oil tank in water, improving detection efficiency and reducing labor intensity.

[0024] During operation, place the car fuel tank to be tested in a suitable position near the immersion tank 1, observe the immersion tank 1, and ensure that the support leg 101 at the bottom of the tank is stable on the ground. Check the control valve 1012 on the outside of the drain pipe 1011 to confirm that it is in the closed state to prevent liquid leakage. At this time, the guide rail mechanism 2 set longitudinally on the left and right sides of the immersion tank 1 provides the track foundation for the movement of subsequent components. Insert the insertion tube 3013 at the front end of the telescopic tube 301 into the fuel filler neck of the car's fuel tank. The airbag assembly 3012, which is sleeved on the outside of the insertion tube 3013, then approaches the fuel filler neck. Activate the air supply assembly B3016, and gas enters the airbag assembly 3012 through the air supply pipe B3017, causing it to inflate and thus tightly seal the fuel filler neck to prevent gas leakage. Since the telescopic tube 301 has a telescopic structure, it can flexibly adapt to different positions of the fuel filler neck. At the same time, the baffle assembly 3011 connected to its front end also plays a certain role in auxiliary positioning. When the air supply component A3014 is turned on, the gas enters the manifold 3 through the air supply pipe A3015, and then enters the car fuel tank through the telescopic pipe 301 and the insertion pipe 3013 connected to the manifold 3, filling the fuel tank with gas at a certain pressure to simulate the internal air pressure state of the fuel tank during normal use. The servo push rod 201, which is longitudinally arranged inside the guide rail mechanism 2, is activated. The moving part 2011 at the top of the servo push rod 201 begins to move upward or downward along the guide rail mechanism 2. Because the moving part 2011 is longitudinally arranged and has two locations, each with a slider 2012 fixedly connected to its outer side, the slider 2012 cooperates with the guide rail mechanism 2 to make the movement of the moving part 2011 smooth and stable. The connecting frame 2013, which is fixedly connected to the top of the two moving parts 2011, moves accordingly. The pressure plate 2014, which is fixedly connected to the bottom of the connecting frame 2013, also moves synchronously. When the pressure plate 2014 descends and contacts the oil tank, it continues to press down, gradually pressing the oil tank into the liquid in the immersion tank 1. During this process, observe whether there are bubbles emerging around the oil tank. If there are bubbles, it indicates that the oil tank has an airtightness problem; if no bubbles are generated within a period of time, it indicates that the oil tank has good airtightness. After the test is completed, shut off the air supply components A3014 and B3016, stop inflating the oil tank and airbag assembly 3012, start the servo push rod 201 to raise the pressure plate 2014, remove the oil tank from the immersion tank 1, open the control valve 1012 on the outside of the drain pipe 1011 to drain the liquid in the immersion tank 1 through the drain pipe 1011 for use in the next test.

[0025] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

Claims

1. An airtightness testing device for automobile fuel tanks, comprising a water immersion tank (1), characterized in that: The front end of the immersion tank (1) is fixedly connected to a hollow internal structure collector (3), and the front end of the collector (3) is fixedly connected to a telescopic pipe (301) with a telescopic structure. The front end of the telescopic tube (301) is fixedly connected to a baffle assembly (3011) with a circular cross section. The front end of the baffle assembly (3011) is fixedly connected to the insertion tube (3013), and the outer side of the insertion tube (3013) is sleeved with an annular airbag assembly (3012). The front end of the immersion tank (1) is fixedly connected in a straight array with air supply components A (3014) and B (3016), and the front ends of air supply components A (3014) and B (3016) are respectively fixedly connected with air supply pipes A (3015) and B (3017).

2. The airtightness testing device for automobile fuel tanks according to claim 1, characterized in that: The air supply pipe A (3015) is used to inflate the inside of the manifold (3), and the air supply pipe B (3017) is used to inflate the inside of the airbag assembly (3012).

3. The airtightness testing device for automobile fuel tanks according to claim 1, characterized in that: The bottom surface of the immersion tank (1) is fixedly connected with two protruding support legs (101) in a straight array, and the right side of the immersion tank (1) is fixedly connected with a drain pipe (1011).

4. The airtightness testing device for automobile fuel tanks according to claim 3, characterized in that: A control valve (1012) is fixedly connected to the outside of the drain pipe (1011), and a longitudinally arranged guide rail mechanism (2) is fixedly connected to both the left and right sides of the immersion tank (1).

5. The airtightness testing device for automobile fuel tanks according to claim 4, characterized in that: The guide rail mechanism (2) is internally fixedly connected to a longitudinally arranged servo push rod (201), and a moving part (2011) is fixedly connected to the top of the servo push rod (201).

6. The airtightness testing device for automobile fuel tanks according to claim 5, characterized in that: The movable component (2011) is arranged longitudinally. There are two movable components (2011), and sliders (2012) are fixedly connected to the outer side of both movable components (2011).

7. The airtightness testing device for automobile fuel tanks according to claim 6, characterized in that: The top ends of the two movable parts (2011) are fixedly connected to a connecting frame (2013), and the bottom end of the connecting frame (2013) is fixedly connected to a pressure plate (2014) for pressing the oil tank.

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