Air tightness detection device

Abstract

The utility model discloses an air tightness detection device, which comprises a bottom plate and a longitudinal left baffle plate fixedly arranged on the bottom plate, the device is characterized in that a front supporting seat and a rear supporting seat are fixedly arranged on a bottom plate, the front supporting seat is provided with a horizontal front oil cylinder, the rear supporting seat is fixedly connected with a longitudinal rear baffle and a horizontal mounting seat, a longitudinal oil cylinder is arranged on the horizontal mounting seat, a right supporting seat is arranged on the bottom plate, and the right supporting seat is provided with a horizontal right oil cylinder; a piston rod of each oil cylinder is fixedly connected with a sealing plate; each sealing plate, one side of the left baffle plate and one side of the rear baffle plate are connected with a rubber pad; an air inlet pipe and a detection air pipe penetrate through the left baffle and the rubber pad of the left baffle, and the detection air pipe is connected with a barometer; the device is wide in application range, the clamping and sealing operation of the workpiece is simple and convenient, and the detection efficiency can be improved.

Description

Technical Field

[0001] This utility model relates to an airtightness testing device, and more particularly to an airtightness testing device for an engine cylinder block. Background Technology

[0002] Diesel engine cylinder blocks are prone to defects such as porosity, cracks, or sand holes during the casting process, leading to reduced airtightness and causing oil and air leaks, affecting the normal operation of the engine. Therefore, airtightness testing of engine cylinder blocks is crucial. Existing airtightness testing devices, such as one disclosed in patent 2024203450790, use a clamping mechanism to fix the cylinder block and set sealing gaskets, an air pressurization mechanism, and a testing mechanism at both ends of the cylinder block to determine airtightness by measuring changes in air pressure within the cylinder. However, this device is only suitable for relatively simple cylinder blocks with openings at both ends. Figure 1 The cylinder body 21 shown, with holes on all five sides, is not suitable, and it is inconvenient for clamping and sealing the workpiece, affecting the testing efficiency. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned shortcomings of the existing technology by providing an airtightness testing device that is not only widely applicable but also easy to clamp and seal, thereby improving testing efficiency.

[0004] To achieve the above objectives, this utility model provides an airtightness testing device, comprising a base plate and a longitudinal left baffle fixed to the base plate; characterized in that a front support seat and a rear support seat are fixed to the base plate, the front support seat is provided with a horizontal front cylinder, the rear support seat is fixed to a longitudinal rear baffle and a horizontal mounting seat, the horizontal mounting seat is provided with a longitudinal cylinder, a right support seat is provided on the base plate, and the right support seat is provided with a horizontal right cylinder; the piston rod of each cylinder is fixed to a sealing plate, and a rubber pad is provided on one side of each sealing plate, the left baffle, and the rear baffle; an air inlet pipe and a detection air pipe both pass through the left baffle and its rubber pad, and the detection air pipe is connected to a pressure gauge.

[0005] During operation, the workpiece is placed on the base plate with no holes at its lower end. Its two end faces are respectively attached to the left and rear baffles. The piston rods of each cylinder extend out, and the three sealing plates are respectively attached to the openings on the front, right, and upper end faces of the workpiece. Each rubber gasket ensures a sealing effect and simultaneously presses the workpiece. High-pressure air is then introduced through the air inlet pipe. If the pressure gauge detects that the pressure has not decreased within a certain period of time, it indicates that the airtightness is qualified. This device is suitable for workpieces with openings on five sides. It not only has a wide range of applications, but also completes the clamping and sealing of the workpiece simultaneously. It is easy to operate and can improve the testing efficiency.

[0006] As a preferred embodiment of this utility model, several leveling pads are provided between the rear support base and the rear baffle, and several screws pass through the rear support base and each leveling pad and are fixedly connected to the rear baffle; the position of the rear baffle in the front-rear direction can be adjusted, which is suitable for workpieces of different specifications and expands the scope of application;

[0007] As a preferred embodiment of this utility model, the base plate is provided with two sliding grooves in the front-to-back direction, and the right support seat is fixedly connected to two sliders that cooperate with the sliding grooves. The right support seat is connected to the drive cylinder. The position of the right support seat can be moved to facilitate the picking and placing of workpieces with larger volumes.

[0008] As a preferred embodiment of this utility model, the three guide rods slide through the front support, the rear support, and the horizontal mounting base respectively, and each guide rod is fixedly connected to its corresponding sealing plate; it can guide and prevent rotation when each sealing plate is extended, ensuring tight fit with each end face and improving the sealing effect.

[0009] In summary, this utility model not only has a wide range of applications, but also simplifies the clamping and sealing operations of workpieces, thereby improving testing efficiency. Attached Figure Description

[0010] Figure 1 This is a 3D view of an existing cylinder block.

[0011] Figure 2 This is a front view of an embodiment of the present utility model.

[0012] Figure 3 for Figure 2 Top view.

[0013] Figure 4 for Figure 2 The left view.

[0014] Figure 5 for Figure 2 The right view.

[0015] Figure 6 This is a perspective view of the detection state in an embodiment of the present invention. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the embodiments. The descriptions of the front, back, left, and right of each part in this application are only used to indicate their relative positions based on the drawings and should not be construed as limiting the present invention.

[0017] like Figures 2 to 6As shown, an airtightness testing device of this embodiment includes a base plate 1, a longitudinal left baffle 2 fixed on the base plate 1, a front support 8 and a rear support 3. The front support 8 is provided with a horizontal front cylinder 6. The rear support 3 is fixedly connected to a horizontal mounting seat 4. A longitudinal cylinder 20 is provided on the horizontal mounting seat 4. A rear baffle 7 is provided on the front side of the rear support 3. Several equal-height pads 9 are provided between the rear support 3 and the rear baffle 7. Several screws (not shown) pass through the rear support 3 and their respective equal-height pads 9 and are fixedly connected to the rear baffle 7. The base plate 1 is provided with two sliding grooves 10 in the front-rear direction. The right support 5 is fixedly connected to two sliders 11 that cooperate with the sliding grooves 10. The right support 5 is connected to a drive cylinder 12. The right support 5 is provided with a horizontal right cylinder 13.

[0018] The piston rods of the front cylinder 6, the longitudinal cylinder 20, and the right cylinder 13 are all fixedly connected to their respective sealing plates 14. Each sealing plate 14 is fixedly connected to a guide rod 15. The three guide rods 15 slide through the front support seat 2, the rear support seat 3, or the horizontal mounting seat 4 respectively. Each sealing plate 14, the left baffle 2, and the rear baffle 7 are provided with a rubber pad 16 on the side that contacts the workpiece. An air inlet pipe 17 and a detection air pipe 18 both pass through the left baffle 2 and its rubber pad 16. The detection air pipe 18 is connected to a pressure gauge 19.

[0019] During operation, the cylinder body 21 is placed on the base plate 1, with no hole at its lower end. Its two end faces are respectively attached to the left baffle 2 and the rear baffle 7. The air inlet pipe 17 and the detection air pipe 18 correspond to the opening at the left end of the cylinder body 21. The piston rods of the front oil cylinder 6, the longitudinal oil cylinder 20, and the right oil cylinder 13 extend out. The three sealing plates 14 are respectively attached to the openings on the front, right, and upper end faces of the cylinder body. Each rubber gasket 16 can ensure the sealing effect and simultaneously press the cylinder body 21. High-pressure air is then introduced through the air inlet pipe 17. If the pressure gauge 18 detects that the pressure has not decreased within a certain period of time, it indicates that the airtightness is qualified. This device is applicable to workpieces with openings on five sides. It not only has a wide range of applications, but also completes the clamping and sealing of the workpiece simultaneously. It is easy to operate and can improve the detection efficiency.

[0020] The position of the rear baffle 7 in the front-to-back direction can be adjusted by the leveling pad 9, which is suitable for workpieces of different thicknesses and expands the scope of application; the position of the right support seat 5 can be moved by the drive cylinder 12, which is convenient for picking up and placing larger workpieces; the three guide rods 15 can guide and prevent rotation when each sealing plate 14 is extended, ensuring tight fit with each end face of the cylinder body, improving the sealing effect and the accuracy of detection.

Claims

1. An airtightness testing device, comprising a base plate and a longitudinal left baffle fixed to the base plate; characterized in that... A front support seat and a rear support seat are fixed on the base plate. The front support seat is equipped with a horizontal front cylinder. The rear support seat is fixed with a longitudinal rear baffle and a horizontal mounting seat. A longitudinal cylinder is mounted on the horizontal mounting seat. A right support seat is provided on the base plate. The right support seat is equipped with a horizontal right cylinder. The piston rod of each cylinder is fixed with a sealing plate. Each sealing plate, the left baffle, and the rear baffle are equipped with a rubber pad on one side. An air inlet pipe and a detection air pipe pass through the left baffle and its rubber pad. The detection air pipe is connected to a pressure gauge.

2. The airtightness testing device according to claim 1, characterized in that: Several leveling pads are provided between the rear support and the rear baffle, and several screws pass through the rear support and their respective leveling pads and are fixed to the rear baffle.

3. An airtightness testing device according to claim 1 or 2, characterized in that: The base plate is provided with two sliding grooves in the front and rear directions. The right support seat is fixedly connected to two sliders that cooperate with the sliding grooves. The right support seat is connected to the drive cylinder.

4. The airtightness testing device according to claim 3, characterized in that: The three guide rods slide through the front support, the rear support, and the horizontal mounting base, respectively, and each guide rod is fixedly connected to its corresponding sealing plate.

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