Conversion valve

Abstract

The invention relates to a conversion valve. A hollow inner wall of a valve body is in interference fit with a ceramic valve sleeve; a ceramic valve core is driven by a top motor; a shifting block is used for limiting; the middle part of the valve body is provided with a water inlet, a water outlet, an upper drain pipe and a lower drain pipe; the periphery of the valve core is provided with a ring-shaped concave water collecting tank; the valve core is in integrated clearance fit with the valve sleeve; the position of the upper drain pipe corresponds to the water collecting tank; and the position of the lower drain pipe corresponds to a lower water collecting cavity. The integrated ceramic valve core of the invention has the advantages of reasonable structure, convenient assembly, high installing efficiency and low manufacturing cost, and capability of greatly improving the reliability of the conversion valve and prolonging the service life of the conversion valve.

Description

technical field

[0001] The invention relates to the field of textile machinery accessories, in particular to a steering valve for a water jet loom. Background technique

[0002] The water-jet loom uses a steering valve to realize the steering of the weaving shuttle. In the actual use process, the weaving shuttle performs high-speed and frequent reciprocating motions, so the steering valve needs to be switched quickly, usually 600 to 800 times per minute. . At present, the commonly used steering valve adopts the single-arm type single-bearing support method. Although the sealing ring is used for sealing, due to frequent rotation, the sealing ring will fail after long-term use (usually about one year), and water will easily seep at this time. Leakage to the metal bearing part will cause the bearing to rust. Once rust occurs, the rotating shaft will deviate, causing the single arm to generate a huge torque, causing the main shaft to twist or the motor load to increase and dama...

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