A measuring device for leak testing of fuel tanks

Abstract

A measuring device for leak testing of fuel tanks includes a locking unit and a leak testing unit. The locking unit includes a fixed base plate, a cylinder support frame, a drive cylinder fixedly installed above the cylinder support frame, a clamping slide plate for mounting the fuel tank to be tested, and two symmetrically arranged first L-shaped support plates. The first L-shaped support plates are composed of a transverse plate and a longitudinal plate. The transverse plate has an upper mounting hole. The fixed base plate has multiple stop holes adapted to the upper mounting hole. The multiple stop holes are arranged in a transversely uniform array. The mounting hole and one of the stop holes are fixedly connected. The upper inner side of the longitudinal plate has a side sliding groove. Two side sliding grooves form a sliding groove. The sliding groove and the clamping slide plate are adapted to slide. The front end of the sliding groove has a sliding opening for the clamping slide plate to slide out. The lower end of the drive cylinder has an airtight pressure head that can seal and adapt to the fuel tank opening. The leak testing unit includes the airtight pressure head and an airtightness testing instrument connected to the airtight pressure head.

Description

Technical Field

[0001] This utility model relates to the field of oil tank leak testing equipment, specifically to a measuring device for oil tank leak testing. Background Technology

[0002] In the automotive, motorcycle, and general machinery manufacturing industries, fuel tanks are critical safety components, and their airtightness reliability is paramount, requiring rigorous leak testing. Currently widely used fuel tank leak testing methods primarily involve positioning and fixing the fuel tank under test, using a drive mechanism to press a sealing head against the tank opening, and then filling it with pressurized gas. An airtightness tester is then used to detect pressure changes to determine the seal. However, existing fuel tank leak testing equipment suffers from significant efficiency bottlenecks and operational inconveniences in practical applications. Different fuel tank models have significant dimensional differences, and traditional tooling fixtures are often fixed or rely on cumbersome adjustments and tightening with multiple bolts. This results in lengthy downtime when switching fuel tank models on the production line, requiring significant time to disassemble old fixtures, install and precisely adjust new fixtures, and even reconfigure equipment layouts. This prolonged downtime severely slows down production cycles and impacts overall efficiency. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a measuring device for leak testing of oil tanks:

[0004] A measuring device for leak testing of fuel tanks includes a locking unit and a leak testing unit. The locking unit includes a fixed base plate, a cylinder support frame, a drive cylinder fixedly installed above the cylinder support frame, a clamping slide for mounting the fuel tank to be tested, and two symmetrically arranged first L-shaped support plates. Each first L-shaped support plate consists of a transverse plate and a longitudinal plate integrally fixedly connected to the upper outer side of the transverse plate. The transverse plate has an upper mounting hole, and the fixed base plate has multiple stop holes adapted to the upper mounting hole. The multiple stop holes are arranged transversely. The uniform array of mounting holes and one of the gear holes is fixedly connected by screws or pins. The upper inner side of the longitudinal plate is provided with a side sliding groove, and two side sliding grooves form a sliding groove. The sliding groove and the clamp slide plate are adapted to slide. The front end of the sliding groove is provided with a sliding opening for the clamp slide plate to slide out. The lower end of the drive cylinder is provided with an airtight pressure head that can seal and adapt to the oil tank opening. The leak test unit includes the airtight pressure head and an airtight tester connected to the airtight pressure head. The leak test unit is used to test the airtightness of the oil tank.

[0005] Preferably, the bottom of the transverse plate is provided with an outwardly protruding slider portion, and the fixed base plate is provided with a track groove that cooperates with the slider portion to form a guide rail, and the track groove is provided with the aforementioned multiple stop holes. When the first L-shaped support plate slides relative to the fixed base plate, the relative position of the two side sliding slots can be adjusted, thereby enabling it to adapt to clamp slides of different sizes.

[0006] Preferably, the locking unit has a top positioning assembly on its back. The top positioning assembly includes a second L-shaped support plate, a threaded push rod, a fixing plate, and a handwheel. The lower end of the second L-shaped support plate is screwed to the fixing base plate, and the upper end of the second L-shaped support plate is fixedly connected to the fixing plate. The threaded push rod is threadedly fitted with a threaded hole in the fixing plate. The handwheel is fixedly connected to the outer end of the threaded push rod, and the inner end of the threaded push rod abuts against the clamping slide plate. The handwheel controls the rotation of the threaded push rod relative to the fixing plate, and the threaded push rod controls the position of the clamping slide plate within the locking unit. The applicant controls the rotation of the threaded push rod via the handwheel, thereby controlling the rotation and retraction of the threaded push rod relative to the fixing plate. The abutting engagement between the threaded push rod and the clamping slide plate controls the relative position of the clamping slide plate relative to the fixing base plate.

[0007] Preferably, the threaded push rod is made of magnetic metal, and the clamping slide plate is provided with a magnetic baffle that magnetically engages with the threaded push rod. The magnetic baffle is vertically fixed to the end of the clamping slide plate. This magnetic engagement structure effectively prevents the clamping slide plate from sliding away from the threaded push rod without the need for a corresponding top component at the front end, thus improving overall stability and providing space for a corresponding handle.

[0008] Preferably, the clamp slide plate is provided with a handle at the end away from the threaded top rod, and the user pulls the clamp slide plate by means of the handle.

[0009] Preferably, the cylinder support frame consists of two symmetrically arranged third L-shaped support plates and a transverse support plate fixedly connected to the upper ends of the two third L-shaped support plates. The two third L-shaped support plates are respectively located outside the two first L-shaped support plates. The third L-shaped support plates are disposed in side slots provided in the fixed base plate. The third L-shaped support plates are provided with through holes, and the fixed base plate is provided with threaded holes. The through holes and threaded holes are fixedly connected by provided screws. The drive cylinder corresponding to the oil tank is disposed on the transverse support plate. The third L-shaped support plates and the transverse support plates of the cylinder support frame are located on both sides of the fixed base plate, just like the first L-shaped support plates, and are not located on the front or rear sides of the fixed base plate. Therefore, they will not obstruct the pulling of the clamp slide.

[0010] Preferably, it also includes a support table, the upper end of which is provided with a tabletop for supporting the locking unit and the leak testing unit.

[0011] Beneficial Effects: This application utilizes a clamping slide plate for positioning and installing the corresponding oil tank. The clamping slide plate is installed on a sliding groove. A drive cylinder controls the airtight pressure head to move downwards to connect with the oil tank opening for airtightness testing, then moves upwards. Finally, a pull-out method is used to directly pull the clamping slide plate out relative to the sliding groove, allowing for airtightness testing of the next oil tank. This method is convenient, quick, and easy to use. 1. By using a quick-change oil tank and a clamping slide plate in conjunction with a quick-adjustment handwheel, the need for changing production with oil tanks of different specifications can be met. 2. The quick-change clamp is designed with a pull-out mechanism, enabling rapid removal of oil tanks and shortening the overall leak testing time. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of Example 1.

[0013] Figure 2 This is a front view schematic diagram of Example 1.

[0014] Figure 3 This is a top view of Example 1.

[0015] Figure 4 Schematic diagram of the locking unit Figure 1 .

[0016] Figure 5 This is a front view schematic diagram of the locking unit.

[0017] Figure 6 Schematic diagram of the locking unit Figure 2 .

[0018] Figure 7 This is a schematic diagram of the structure of the first L-shaped support plate.

[0019] Figure 8 This is a structural diagram of a fixed base plate.

[0020] Reference numerals: 1. Fixed base plate; 2. Drive cylinder; 3. Clamp slide plate; 4. First L-shaped support plate; 5. Upper mounting hole; 6. Gear hole; 7. Slide groove; 8. Airtight pressure head; 9. Airtightness tester; 10. Sliding block; 11. Track groove; 12. Second L-shaped support plate; 13. Threaded top rod; 14. Fixed plate; 15. Handwheel; 16. Magnetic baffle; 17. Handle; 18. Third L-shaped support plate; 19. Transverse support plate; 20. Support table. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1-8 The present invention will be further described with reference to Example 1.

[0022] Example 1: A measuring device for leak testing of an oil tank includes a locking unit, a leak testing unit, and a support table. The upper end of the support table is provided with a tabletop for supporting the locking unit and the leak testing unit.

[0023] The locking unit includes a fixed base plate, a cylinder support frame, a drive cylinder fixedly installed above the cylinder support frame, a clamping slide plate for mounting the oil tank to be tested, and two symmetrically arranged first L-shaped support plates. The first L-shaped support plate consists of a transverse plate and a longitudinal plate integrally fixedly connected to the upper outer side of the transverse plate. The transverse plate has an upper mounting hole, and the fixed base plate has multiple stop holes adapted to the upper mounting hole. The multiple stop holes are arranged in a transversely uniform array. The mounting hole and one of the stop holes are fixedly connected by screws or pins. The upper inner side of the longitudinal plate has a side sliding groove, and two side sliding grooves form a sliding groove. The sliding groove and the clamping slide plate are adapted for sliding. The front end of the sliding groove has a sliding opening for the clamping slide plate to slide out. The lower end of the drive cylinder has an airtight pressure head capable of sealing and adapting to the oil tank opening. The leak testing unit includes the airtight pressure head and an airtightness testing instrument connected to the airtight pressure head. The airtight pressure head is sealed to the oil tank opening, and the leak testing unit is used to test the airtightness of the oil tank.

[0024] The bottom of the transverse plate is provided with an outwardly protruding slider portion, and the fixed base plate is provided with a track groove that cooperates with the slider portion to form a guide rail. The track groove is provided with multiple stop holes. When the first L-shaped support plate slides relative to the fixed base plate, the relative position of the two side sliding slots can be adjusted, thereby enabling it to adapt to clamp slides of different sizes.

[0025] The locking unit has a top positioning assembly on its back, which includes a second L-shaped support plate, a threaded push rod, a fixing plate, and a handwheel. The lower end of the second L-shaped support plate is fixed to the fixing base plate with screws, and the upper end of the second L-shaped support plate is fixedly connected to the fixing plate. The threaded push rod is threadedly fitted with a threaded hole in the fixing plate. The handwheel is fixedly connected to the outer end of the threaded push rod, and the inner end of the threaded push rod abuts against the clamping slide plate. The handwheel controls the rotation of the threaded push rod relative to the fixing plate, and the threaded push rod controls the position of the clamping slide plate in the locking unit. The threaded push rod is made of magnetic metal, and the clamping slide plate has a magnetic baffle that magnetically engages with the threaded push rod. The magnetic baffle is vertically fixed to the end of the clamping slide plate. A handle is located at the end of the clamping slide plate away from the threaded push rod, allowing the user to pull the clamping slide plate.

[0026] The cylinder support frame consists of two symmetrically arranged third L-shaped support plates and a transverse support plate fixedly connected to the upper ends of the two third L-shaped support plates. The two third L-shaped support plates are located outside the two first L-shaped support plates. Each third L-shaped support plate is positioned within a side slot in the fixed base plate. Each third L-shaped support plate has a through hole, and the fixed base plate has a threaded hole. The through hole and the threaded hole are fixedly connected by screws. The drive cylinder corresponding to the oil tank is mounted on the transverse support plate. Like the first L-shaped support plates, the third L-shaped support plates and the transverse support plate of the cylinder support frame are located on both sides of the fixed base plate, not on the front or rear sides, thus not obstructing the sliding of the clamp slide.

[0027] Operating principle: The clamp slide is installed on the slide groove. The front and rear displacement of the clamp slide is adjusted by the handwheel. The left and right displacement of the clamp slide is adjusted by adjusting the upper mounting hole and the matching gear hole. After the position is determined, the airtight pressure head is moved down by the drive cylinder. The drive cylinder automatically presses down and runs, blocking the oil tank opening through the airtight pressure head to conduct an airtight test. After the oil tank test is completed, the cylinder automatically returns to its original position.

[0028] Obviously, the above embodiments of this utility model are merely illustrative examples and not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, these obvious variations or modifications derived from the essential spirit of this utility model still fall within the protection scope of this utility model.

Claims

1. A measuring device for leak testing of oil tanks, comprising a locking unit and a leak testing unit, characterized in that: The locking unit includes a fixed base plate (1), a cylinder support frame, a drive cylinder (2) fixedly installed above the cylinder support frame, a clamping slide plate (3) for installing the oil tank to be tested, and two symmetrically arranged first L-shaped support plates (4). The first L-shaped support plate (4) is composed of a transverse plate and a longitudinal plate integrally fixedly connected to the upper outer side of the transverse plate. The transverse plate is provided with an upper mounting hole (5). The fixed base plate (1) is provided with a plurality of gear holes (6) adapted to the upper mounting hole (5). The plurality of gear holes (6) are arranged in a transversely uniform array. The mounting hole (5) and its... A gear hole (6) is fixedly connected by a screw or pin. The upper inner side of the longitudinal plate is provided with a side sliding groove. The two side sliding grooves form a sliding groove (7). The sliding groove (7) and the clamp slide plate (3) are adapted to slide. The front end of the sliding groove (7) is provided with a sliding opening for the clamp slide plate (3) to slide out. The lower end of the drive cylinder (2) is provided with an airtight pressure head (8) that can seal and adapt to the oil tank opening. The leak test unit includes the airtight pressure head (8) and an airtight tester (9) connected to the airtight pressure head (8). The leak test unit is used to test the airtightness of the oil tank.

2. The measuring device for leak testing of oil tanks according to claim 1, characterized in that: The bottom of the horizontal plate is provided with an outwardly protruding slider part (10), and the fixed base plate (1) is provided with a track groove (11) that cooperates with the slider part (10) to form a guide rail. The track groove (11) is provided with the multiple gear holes (6).

3. The measuring device for leak testing of oil tanks according to claim 1, characterized in that: The back of the locking unit is provided with a top positioning assembly, which includes a second L support plate (12), a threaded top rod (13), a fixing plate (14), and a handwheel (15). The lower end of the second L support plate (12) is fixed to the fixing base plate (1) with screws, and the upper end of the second L support plate (12) is fixedly connected to the fixing plate (14). The threaded top rod (13) and the threaded hole provided on the fixing plate (14) form a threaded fit. The handwheel (15) and the outer end of the threaded top rod (13) form a fixed connection. The inner end of the threaded top rod (13) and the clamp slide plate (3) form abutment fit. The handwheel (15) is used to control the rotation of the threaded top rod (13) relative to the fixing plate (14). The threaded top rod (13) is used to control the position of the clamp slide plate (3) in the locking unit.

4. The measuring device for leak testing of oil tanks according to claim 3, characterized in that: The threaded push rod (13) is made of magnetic metal. The clamp slide plate (3) is provided with a magnetic baffle (16) that magnetically engages with the threaded push rod (13). The magnetic baffle (16) is vertically fixed to the end of the clamp slide plate (3).

5. The measuring device for leak testing of oil tanks according to claim 3, characterized in that: The clamp slide plate (3) is provided with a handle (17) at the end away from the threaded top rod (13), and the user pulls the clamp slide plate (3) through the handle (17).

6. The measuring device for leak testing of oil tanks according to claim 1, characterized in that: The cylinder support frame consists of two symmetrically arranged third L support plates (18) and a transverse support plate (19) fixedly connected to the upper ends of the two third L support plates (18). The two third L support plates (18) are located on the outside of the two first L-shaped support plates (4). The third L support plates (18) are set in the side slots provided in the fixed base plate (1). The third L support plates (18) are provided with through holes. The fixed base plate (1) is provided with threaded holes. The through holes and threaded holes are fixedly connected by provided screws. The drive cylinder (2) corresponding to the oil tank is set on the transverse support plate (19).

7. The measuring device for leak testing of oil tanks according to claim 1, characterized in that: It also includes a support table (20), the upper end of which is provided with a tabletop for supporting the locking unit and the leak testing unit.

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