Gauge head for detecting airtightness of engine air valve and valve seat

Abstract

The invention discloses a detection head for carrying out airtight detection between a valve and a valve seat of an engine. The detection head is characterized in that the detection head is provided with a guide rod (1); the guide rod (1) is connected with a measuring conical surface (2); the edge of the measuring conical surface (2) is provided with an annular nozzle (3); the measuring conical surface (2) is connected with a detection head body (4); the inside of the detection head body (4) is provided with an air circuit (7); the air circuit (7) is connected with an air pipe (5) through a joint; the annular nozzle (3) is communicated with the air pipe (5) through the air circuit (7); and the detection head body (4) is connected with a handle (6). The detection head has simple, convenient and rapid operation, high detection efficiency and high precision.

Description

Technical field: [0001] The invention relates to a probe, in particular to a probe for detecting air tightness of engine valves and valve seats. Background technique: [0002] The airtightness of the engine is a comprehensive indicator of the performance of the engine compression system. The better the air tightness, the higher the speed and the greater the torque. An engine with poor airtightness not only has low power, but also causes unstable operation due to poor oil absorption performance, difficulty in adjustment, and easy parking. In factory production, the scrap rate of engines due to poor air tightness is relatively high, and engine air tightness testing has become an indispensable and important link in automatic production lines. At present, the air tightness test can be divided into several categories according to the test method, one is the water submerged leak test method (also known as the wet immersion method), that is, when the gas of a certain pressure is ...

AI Technical Summary

Problems solved by technology

However, the sealing structure of the probe used by the current detector and the material of the seal are important factors. Generally, a special mold is required for pressing. Most of them are on the steel sealing head with a sealing groove, and the seal is placed in the groove. , for sealing, since the sealing tester uses low pressure, the sealing only needs to ensure that the gas in the test chamber does not leak, and the common cylinder pressing force is used to compress, and the general device is relatively large and cumbersome

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