Dual-safety exhaust valve

Abstract

The invention discloses a dual-safety exhaust valve, which comprises a valve body, and an upper valve body and a lower valve body are fastened together to form the valve body. The dual-safety exhaust valve is characterized in that: the upper valve body and the lower valve body are welded to form a one-piece structure, a holder is arranged at the joint between the cavities of the upper valve body and the lower valve body, the upper end of the upper valve body is provided with an exhaust nozzle with a side air hole, an exhaust bolt is screwed in the upper end of the exhaust nozzle, a push pin is arranged under the exhaust bolt, the diameter of the push pin is less than the diameter of a main exhaust hole, a float is arranged in the cavity of the valve body, a conical valve seat is arranged on the top of a connecting rod, the lower part of the connecting rod is connected with the float, the connecting rod runs through a ring in the center of the holder, the upper end of the conical valve seat is matched with the main exhaust hole, the lower end of the lower valve body is provided with a water intake and discharge hole which communicates with the cavity of the valve body, and a filter screen is also arranged at the joint between the water intake and discharge hole and the cavity of the valve body. The dual-safety exhaust valve has the characteristics of simple structure, low cost and long service life, and not only has an automatic exhaust function, but also can adopt a manual operation mode to exhaust the air.

Description

technical field [0001] The invention relates to an exhaust device used for water pipeline circulation in heating and cooling systems, in particular to a double-safety exhaust valve. Background technique [0002] On the water circulation pipeline of the heating and cooling system, in order to prevent the gas in the pipeline from causing poor water circulation, it is necessary to install an exhaust valve on the pipeline, and use the exhaust function of the exhaust valve to ensure that the pressure in the pipeline is always Stay within the required range. However, in the traditional exhaust valve, there are seams at the junction of the upper and lower valve bodies, and the medium is very easy to leak at the seams. And the traditional exhaust valve is either a manual exhaust valve, which relies on manual operation to open the valve body after a period of time to discharge the gas in the pipeline; or it is an automatic exhaust valve. Although the automatic exhaust valve saves ma...

AI Technical Summary

Problems solved by technology

In the traditional exhaust valve, there is a seam at the junction of the upper and lower valve bodies, and the medium is very easy to leak at the seam

And the traditional exhaust valve is either a manual exhaust valve, which relies on manual operation to open the valve body after a period of time to discharge the gas in the pipeline; or it is an automatic exhaust valve. Although the automatic exhaust valve saves manpower, it can realize automatic exhaust. Exhaust function, but it is very easy to block the vent hole, and there is a big safety hazard

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