Gas exchange plug

Gas exchange cock technology: This utility model relates to a coke oven equipment used for controlling the entry into a waste gas exchanger, specifically a coke oven gas exchange cock.

Gas exchange plug background technology: In production, in order to control the mixing ratio of coal and gas, exchange cocks need to be installed on the mixing channel of the coke oven. In the existing technology, the dynamic sealing end of the exchange cock directly installs the support shaft in the hole of the end cover, and the support shaft directly generates friction with the end cover during operation. This greatly shortens the lifespan of the sealing surface and support shaft of the cock, and also has a significant impact on the sealing performance of the cock.

The present utility model provides a coke oven gas exchange cock in response to the above problems, which has stable structural performance and good sealing performance. According to the technical solution of the present utility model, a coke oven gas exchange cock is characterized in that it comprises a cock shell, wherein the left end of the cock shell is provided with an outlet, the upper end of the cock shell is provided with an upper end cover, and the lower end is provided with a lower end cover. The inner core of the cock is arranged in the cock shell, the support shaft is arranged in the inner core of the cock, and the support shaft is supported on the upper end cover through a sealing device, The outer end of the support shaft extends out of the middle hole of the upper end cover, and the sealing device includes a bearing sleeve, a bearing, and a cover sleeve. The bearing sleeve is fixedly arranged on the middle hole of the outer end face of the upper end cover, the bearing is installed inside the bearing sleeve, the cover sleeve is sleeved on the support shaft, the cover sleeve compresses the upper end of the bearing sleeve, and a manual lever is set on the cover sleeve. A spring is also installed on the support shaft, and the upper end of the spring is pressed against the upper end cover, The lower end is pressed against the inner core of the plug. As a further improvement of the utility model, the upper cover is fastened to the plug housing by bolts. As a further improvement of the utility model, the bearing sleeve is fastened to the upper end cover through bolts. As a further improvement of this utility model, the lower end cover is fastened to the small end of the inner core of the plug through a third bolt. The technical effect of this utility model is that by making technical improvements to the exchange cock used in coke ovens in the existing technology, the support shaft in the exchange cock no longer directly contacts the end cover of the exchange cock, and by installing bearings, bearing sleeves, and cover sleeves set at the end cover of the support shaft, The utility model not only avoids the direct Sliding friction between the support shaft and the plug end cover, but also enhances the sealing performance of the exchange cock by the cover sleeve of the support shaft end sleeve. The utility model is simple, convenient to use, low in production cost and easy to maintain.