Cylinder cover airtightness detector rear-blocking device

Abstract

The invention relates to the field of cylinder cover airtightness detection, in particular to a cylinder cover airtightness detector rear-blocking device. The cylinder cover airtightness detector rear-blocking device comprises a multi-purpose end plug, an air chamber, an air pipe, a reversing valve and a cylinder. The whole device is simple in structure; by means of the connection mode of one air pipe, one switch, one air chamber and one end plug, the corresponding end plug and the corresponding air chamber are selected and the corresponding air pipe is opened according to the size of rear holes of cylinder covers, pressurized air passes through the reversing valve and the air pipe, enters the air chamber and then pushes the end plug after entering the air chamber, and therefore the aim of blocking rear holes of different cylinder covers is achieved.

Description

technical field [0001] The invention relates to the field of cylinder head air tightness detection, in particular to a rear blocking device of a cylinder head air tightness detector. Background technique [0002] The cylinder head of the engine has very strict requirements on air tightness. Before leaving the factory, it is necessary to test the air tightness parameters. Only products with good performance and qualified inspection can be sold. To test the air tightness of the cylinder head, usually use Dry-type sealing inspection method, that is, the cylinder head is positioned on the workbench, the hole on the cylinder head is blocked, and the cylinder head is ventilated, and the air pressure of the cylinder head is detected by observing the difference between the air pressure after the gas is stabilized and the input air pressure. tightness. [0003] In order to block the cylinder head hole, the cylinder pushes the plug usually to be compressed. There is a hole on the rea...

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Problems solved by technology

[0003] In order to block the cylinder head hole, the cylinder pushes the plug usually to be compressed. There is a hole on the rear surface of the cylinder head, but the holes of different cylinder heads are of different sizes. The head needs to be disassembled and assembled during inspection, which is time-consuming and labor-intensive. If a large-sized plug is used directly, since the rear surface of the cylinder head is uneven, there will be a gap between the plug and the hole, which is not conducive to the plug. The blocking effect affects the detection accuracy, especially for small holes, use large plugs to plug, because the rear view surface is uneven, and the large plugs have no blocking effect, and the detection effect cannot be achieved

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