Air tightness detection device convenient for pressure regulation and used for carbon tank

By designing an airtightness detection device that combines a lifting frame and adjustment components, the problem of difficulty in detecting leaks in carbon canisters has been solved, achieving efficient marking and detection of leak locations.

CN224189443UActive Publication Date: 2026-05-01NANPI JINLIYANG ELECTRONICS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
NANPI JINLIYANG ELECTRONICS
Filing Date
2025-06-25
Publication Date
2026-05-01

AI Technical Summary

Technical Problem

Existing technologies for detecting the airtightness of carbon canisters do not allow for direct identification of leaks, resulting in low detection efficiency.

Method used

An airtightness testing device was designed, comprising a testing box, a lifting frame, a lifting assembly, an air inlet pipe, a fixed base, a sealing bag, and an adjustment assembly. Through the cooperation of the lifting frame and the adjustment assembly, the sealing bag can be stably fitted onto the carbon canister, and the leak point can be directly displayed through water pressure and gas detection.

Benefits of technology

It improves the efficiency of carbon canister airtightness testing, allows for easy marking of leak locations, and enhances the accuracy and efficiency of testing.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a carbon tank air tightness detection device convenient for pressure regulation, which comprises a detection box, a lifting frame, a lifting assembly, an air inlet pipe, a fixed seat, a sealing bag and a regulation assembly, and is characterized in that the lifting frame is arranged on the upper side of the detection box in a lifting manner, the lifting assembly is arranged between the lifting frame and the detection box, and the air inlet pipe is communicated with the lifting frame; a rubber pipe is connected to the air inlet pipe in a penetrating mode, the rubber pipe is communicated with a port of the carbon tank so that the port of the carbon tank can be conveniently communicated, one side of the air inlet pipe is communicated with compression equipment, compressed air can be introduced into the carbon tank through the rubber pipe, the fixing base is arranged on the lifting frame and used for fixing the carbon tank, and the sealing bag is movably arranged on the lower side of the carbon tank. The adjusting assembly is arranged between the sealing bag and the lifting frame, detection water is contained in the detection box, the carbon tank and the sealing bag are immersed into the detection water during detection, and a mounting frame is fixedly connected to one side of the detection box. The air tightness detection device for the carbon tank convenient for pressure regulation is convenient for improving the air tightness detection efficiency of the pressure regulation carbon tank.
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Description

An airtightness testing device for a pressure-adjustable carbon canister Technical Field

[0001] This utility model relates to the field of airtightness testing technology, specifically to an airtightness testing device for carbon canisters that is easy to adjust pressure. Background Technology

[0002] The carbon canister is usually installed between the fuel tank and the engine. Its outer shell is generally made of plastic, and its interior is filled with highly absorbent activated carbon particles. The top is equipped with a cleaning control valve and a filter. The cleaning control valve is used to control the amount of gasoline vapor and air entering the intake manifold, while the filter is used to purify the gasoline vapor, which can prevent gasoline vapor from being directly emitted into the atmosphere and reduce environmental pollution.

[0003] In order to maintain the pressure balance within the carbon canister and fuel system, ensure the normal operation of the carbon canister, and avoid fuel evaporation pollution, abnormal fuel consumption, or system failure caused by abnormal pressure, it is necessary to maintain a dynamic balance between positive and negative pressure in the carbon canister. Among these, airtightness is particularly important for carbon canister pressure regulation.

[0004] In existing technologies, when testing the airtightness of carbon canister pressure regulators, the three ports of the carbon canister are usually sealed, compressed air at a pressure of 14.0 kPa is introduced, and the canister is placed in clean water at a depth of no more than 100 mm for 30 seconds. The airtightness of each connection is then checked for the generation of air bubbles. However, the current testing method is not convenient for directly displaying the leaks. It requires the staff to observe with their own eyes and make multiple adjustments to find the leaks, resulting in low efficiency when testing the airtightness of carbon canister pressure regulators. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides an airtightness detection device for carbon canisters that is easy to adjust the pressure, thereby solving the problem mentioned in the background technology that it is inconvenient to directly display and mark the leakage point.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: an airtightness testing device for carbon canisters that is easy to adjust pressure, comprising a testing box, a lifting frame, a lifting assembly, an air inlet pipe, a fixed base, a sealing bag, and an adjustment assembly;

[0009] The lifting frame is positioned on the upper side of the testing box;

[0010] The lifting assembly is disposed between the lifting frame and the detection box;

[0011] The air intake pipe is connected to the lifting frame;

[0012] The fixing seat is mounted on the lifting frame and is used to fix the carbon canister.

[0013] The sealing bag is movably positioned on the lower side of the carbon canister, and the sealing bag is detachably connected to one side of the lifting frame;

[0014] The adjustment component is located between the sealed bag and the lifting frame.

[0015] Furthermore, the lifting assembly includes:

[0016] The first electric cylinder is mounted on one side of the detection box via a mounting plate;

[0017] A lifting plate, which is fixedly connected between the output end of the first electric cylinder and the lifting frame;

[0018] A stabilizing plate, which is fixedly connected to one side of the lifting frame;

[0019] A stabilizing cylinder, located below the stabilizing plate;

[0020] A stabilizer bar is slidably connected through the stabilizer cylinder and is fixedly connected to the stabilizer plate.

[0021] Furthermore, the adjustment component includes:

[0022] The second electric cylinder is mounted on the lifting frame;

[0023] An adjusting plate, which is detachably connected to the output end of the second electric cylinder;

[0024] A connecting seat is provided between the output end of the second electric cylinder and the adjusting plate;

[0025] An adjusting ring is fixedly connected between the adjusting plate and the sealing bag.

[0026] Furthermore, the fixing base includes:

[0027] The fixed frame is provided in two parts, and the two fixed frames are symmetrically connected to the lifting frame.

[0028] A fixing pad is fixedly connected to each of the fixing frames, and the fixing pad has a fixing groove for fixing the carbon canister.

[0029] Furthermore, a rubber tube is connected through the intake pipe, and the rubber tube is connected to the port of the carbon canister.

[0030] Furthermore, the connector includes:

[0031] A connecting plate, which is fixedly connected to the output end of the second electric cylinder;

[0032] Two connecting screws are provided, and the two connecting screws are symmetrically threaded between the connecting plate and the adjusting plate.

[0033] Furthermore, a limiting block is fixedly connected to one side of the adjusting plate, and a limiting groove is provided on the lifting frame for the limiting block to slide.

[0034] Furthermore, a mounting frame is fixedly connected to one side of the testing box, and a transparent observation plate is installed inside the mounting frame.

[0035] (III) Beneficial Effects

[0036] Compared with the prior art, this utility model provides an airtightness testing device for carbon canisters that is easy to adjust the pressure, and has the following beneficial effects:

[0037] In this invention, the lifting frame and fixed base facilitate the installation of the pressure-regulating carbon canister. The lifting frame and adjusting components facilitate the movement and unfolding of the sealing bag, allowing it to be fitted onto the carbon canister. Simultaneously, the lifting components facilitate the movement of the fixed base, carbon canister, adjusting components, and sealing bag, allowing the carbon canister and sealing bag to enter the detection water. Under water pressure, the sealing bag is squeezed and adhered to the surface of the carbon canister. Then, detection gas is delivered into the carbon canister through the air inlet pipe. Leakage points will blow up the corresponding sealing bag, causing it to bulge in the water, making it easy to directly display the leak location. This facilitates direct marking of the leak location in the carbon canister, thereby improving the detection efficiency of the pressure-regulating carbon canister. Attached Figure Description

[0038] Figure 1 is a schematic diagram of the overall structure of this application;

[0039] Figure 2 is a partially enlarged structural diagram of point A in Figure 1 of this application;

[0040] Figure 3 is a schematic diagram of the structure of the lifting frame, the first electric cylinder and the lifting plate of this application;

[0041] Figure 4 is a schematic diagram of the structure of the sealing bag, adjusting ring and limiting block of this application.

[0042] In the diagram: 1. Detection box; 2. Lifting frame; 3. Air inlet pipe; 4. Sealing bag; 5. Carbon canister; 6. First electric cylinder; 7. Lifting plate; 8. Stabilizing plate; 9. Stabilizing cylinder; 10. Stabilizing rod; 11. Second electric cylinder; 12. Adjusting plate; 13. Adjusting ring; 14. Fixing frame; 15. Fixing pad; 16. Rubber hose; 17. Connecting plate; 18. Connecting screw; 19. Limiting block; 20. Observation plate. Detailed Implementation

[0043] 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.

[0044] Please refer to Figures 1 to 4. A pressure-adjustable airtightness testing device for a carbon canister includes a testing box 1, a lifting frame 2, a lifting assembly, an air inlet pipe 3, a fixed base, a sealing bag 4, and an adjusting assembly. The lifting frame 2 is flexibly positioned above the testing box 1. The lifting assembly is located between the lifting frame 2 and the testing box 1. The air inlet pipe 3 connects to the lifting frame 2, and a rubber tube 16 is threaded through the air inlet pipe 3. The rubber tube 16 connects to the port of the carbon canister 5. The rubber tube 16 has a certain degree of elasticity to facilitate connection to the port of the carbon canister 5. One side of the air inlet pipe 3 connects to a compression device. Compressed gas is introduced into the carbon canister 5 through the rubber tube 16. The fixing seat is set on the lifting frame 2 to fix the carbon canister 5. The sealing bag 4 is movably set on the lower side of the carbon canister 5 and is detachably connected to one side of the lifting frame 2. The sealing bag 4 can be contracted and expanded. The adjustment component is set between the sealing bag 4 and the lifting frame 2. The test chamber 1 contains test water. During the test, the carbon canister 5 and the sealing bag 4 are submerged in the test water. An installation frame is fixedly connected to one side of the test chamber 1. A transparent observation plate 20 is installed in the installation frame to facilitate the observation of the test process inside the test chamber 1.

[0045] Referring to Figures 1 and 3, the lifting assembly includes a first electric cylinder 6, a lifting plate 7, a stabilizing plate 8, a stabilizing cylinder 9, and a stabilizing rod 10. The first electric cylinder 6 is mounted on one side of the detection box 1 via a mounting plate. The lifting plate 7 is fixedly connected between the output end of the first electric cylinder 6 and the lifting frame 2. The stabilizing plate 8 is fixedly connected to one side of the lifting frame 2. The stabilizing cylinder 9 is located below the stabilizing plate 8. The stabilizing rod 10 is slidably connected to the stabilizing cylinder 9 and is fixedly connected to the stabilizing plate 8.

[0046] When the carbon canister 5 needs to be tested, the first electric cylinder 6 can drive the lifting plate 7 to rise and fall, so that the lifting plate 7 drives the lifting frame 2 to move. This allows the lifting frame 2 to move the carbon canister 5, the second electric cylinder 11, and the sealing bag 4. At the same time, during the movement of the lifting frame 2, the stabilizing rod 10 will move inside the stabilizing cylinder 9, which improves the stability of the movement of the lifting frame 2. This allows the carbon canister 5 and the sealing bag 4 to move stably in and out of the test water, improving the stability of the pressure-regulating carbon canister 5 for airtightness testing.

[0047] Referring to Figure 4, the adjustment assembly includes a second electric cylinder 11, an adjustment plate 12, a connecting seat, and an adjustment ring 13. The second electric cylinder 11 is mounted on the lifting frame 2. The adjustment plate 12 is detachably connected to the output end of the second electric cylinder 11. A limit block 19 is fixedly connected to one side of the adjustment plate 12. The lifting frame 2 has a limit groove for the limit block 19 to slide, which can limit the sliding of the adjustment plate 12 and improve the stability of the adjustment plate 12 sliding on the lifting frame 2. The connecting seat is located between the output end of the second electric cylinder 11 and the adjustment plate 12. The adjustment ring 13 is fixedly connected between the adjustment plate 12 and the sealing bag 4.

[0048] When the second electric cylinder 11 is started, the adjusting plate 12 will drive the adjusting ring 13 to move, which in turn will drive the sealing bag 4 to move and unfold, covering the carbon canister 5. When the carbon canister 5 and the sealing bag 4 enter the detection water, the air in the sealing bag 4 will be gradually discharged by the pressure of the detection water, and it will be stably attached to the carbon canister 5. When the carbon canister 5 is detected to be leaking at a certain point, the corresponding position of the sealing bag 4 will be blown inward and bulge, which can be directly observed with the naked eye. At the same time, the bulge on the sealing bag 4 can be quickly marked. When it is necessary to repair the leak, the marked part of the sealing bag 4 can be directly damaged to expose the leak in the carbon canister 5 for direct repair.

[0049] Referring to Figures 1 and 2, the fixing base includes a fixing frame 14 and a fixing pad 15. There are two fixing frames 14, which are symmetrically connected to the lifting frame 2. The fixing pad 15 is fixedly connected to each fixing frame 14, and the fixing pad 15 is provided with a fixing groove for fixing the carbon canister 5.

[0050] The fixing pad 15 has a certain degree of elasticity and can fix carbon canisters 5 of different specifications. By moving the upper side of the carbon canister 5 between the two fixing slots, the carbon canister 5 can be fixed between the two fixing brackets 14 and the two fixing pads 15, which facilitates the inspection of the carbon canister 5. At the same time, it is easy to quickly disassemble and replace the carbon canister 5 after the inspection is completed, which improves the efficiency of the airtightness inspection of the pressure regulating carbon canister 5.

[0051] Referring to Figure 4, the connecting seat includes a connecting plate 17 and connecting screws 18. The connecting plate 17 is fixedly connected to the output end of the second electric cylinder 11. There are two connecting screws 18, which are symmetrically threaded between the connecting plate 17 and the adjusting plate 12.

[0052] When the adjusting plate 12, adjusting ring 13 and sealing bag 4 need to be replaced according to the specifications of the carbon canister 5 being tested, the connecting screw 18 can be directly turned between the connecting plate 17 and the adjusting plate 12 to remove the old sealing bag 4. After the new sealing bag 4 is installed, the connecting screw 18 can be turned between the connecting plate 17 and the adjusting plate 12 again, which improves the stability of the installation of the adjusting plate 12, adjusting ring 13 and sealing bag 4.

[0053] In summary, this easy-to-adjust carbon canister airtightness testing device first installs the carbon canister 5 between two fixed frames 14 and two fixed pads 15, and then starts the second electric cylinder 11, causing the adjusting ring 13 to move the sealing bag 4 upward, so that the sealing bag 4 covers the carbon canister 5. Then, the first electric cylinder 6 is started, causing the lifting frame 2 to move the second electric cylinder 11, the carbon canister 5, and the sealing bag 4, so that the carbon canister 5 and the sealing bag 4 are submerged in the test water. The sealing bag 4 will adhere to the surface of the carbon canister 5. At the same time, compressed gas is introduced into the carbon canister 5 through the air inlet pipe 3 and the rubber tube 16 to perform airtightness testing. When a leak occurs in the carbon canister 5, the corresponding position of the sealing bag 4 will be blown up and can be directly marked.

[0054] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for detecting the airtightness of a carbon canister that is easy to adjust pressure, characterized in that, include: Test box (1); lifting frame (2), the lifting frame (2) is lifted and positioned on the upper side of the test box (1); lifting assembly, the lifting assembly is positioned between the lifting frame (2) and the test box (1); air inlet pipe (3), the air inlet pipe (3) is connected to the lifting frame (2); fixed seat, the fixed seat is positioned on the lifting frame (2) and is used to fix the carbon canister (5); A sealing bag (4) is movably disposed on the lower side of the carbon canister (5) and is detachably connected to one side of the lifting frame (2); an adjusting assembly is disposed between the sealing bag (4) and the lifting frame (2).

2. The airtightness testing device for a carbon canister that is easy to adjust pressure according to claim 1, characterized in that, The lifting assembly includes: a first electric cylinder (6), which is mounted on one side of the detection box (1) via a mounting plate; a lifting plate (7), which is fixedly connected between the output end of the first electric cylinder (6) and the lifting frame (2); a stabilizing plate (8), which is fixedly connected to one side of the lifting frame (2); a stabilizing cylinder (9), which is located below the stabilizing plate (8); and a stabilizing rod (10), which is slidably connected to the stabilizing cylinder (9) and is fixedly connected to the stabilizing plate (8).

3. The airtightness testing device for a carbon canister that is easy to adjust pressure according to claim 2, characterized in that, The adjustment assembly includes: a second electric cylinder (11) mounted on the lifting frame (2); an adjustment plate (12) detachably connected to the output end of the second electric cylinder (11); a connecting seat disposed between the output end of the second electric cylinder (11) and the adjustment plate (12); and an adjustment ring (13) fixedly connected between the adjustment plate (12) and the sealing bag (4).

4. The airtightness testing device for a carbon canister that is easy to adjust pressure according to claim 3, characterized in that, The fixing base includes: a fixing frame (14), two fixing frames (14) are provided, and the two fixing frames (14) are symmetrically connected to the lifting frame (2); a fixing pad (15), the fixing pad (15) is fixedly connected to each of the fixing frames (14), and the fixing pad (15) is provided with a fixing groove for fixing the carbon canister (5).

5. The airtightness testing device for a carbon canister that is easy to adjust pressure according to claim 4, characterized in that, A rubber tube (16) is connected through the air intake pipe (3), and the rubber tube (16) is connected to the port of the carbon canister (5).

6. The airtightness testing device for a carbon canister that is easy to adjust pressure according to claim 5, characterized in that, The connecting seat includes: a connecting plate (17), which is fixedly connected to the output end of the second electric cylinder (11); and two connecting screws (18), which are symmetrically threaded between the connecting plate (17) and the adjusting plate (12).

7. The airtightness testing device for a carbon canister that is easy to adjust pressure according to claim 6, characterized in that, A limiting block (19) is fixedly connected to one side of the adjusting plate (12), and a limiting groove is provided on the lifting frame (2) for the limiting block (19) to slide.

8. The airtightness testing device for a carbon canister that is easy to adjust pressure according to claim 7, characterized in that, A mounting frame is fixedly connected to one side of the detection box (1), and a transparent observation plate (20) is installed inside the mounting frame.