Piston type balance valve

Abstract

The invention discloses a piston type balance valve. An inlet and an outlet are formed in two sides of a valve body of the piston type balance valve; the upper and lower parts of the valve body are respectively closed by an upper valve cover and a lower valve cover; a plurality of piston parts are arranged in a valve cavity; an upper valve rod penetrates through the upper valve cover and is connected with an upper piston type valve clack in an opened barrel of the upper valve cover; a sleeve type step valve seat is arranged in the lower part of the valve body and is closed by using the lower valve cover; a lower piston type valve clack and a driving piston are mounted in the sleeve type step valve seat; the lower piston type valve clack is connected with the driving piston through a lower valve rod; balancing holes are respectively formed in the upper piston type valve clack and the lower piston type valve clack; a plurality of abnormal windows are formed in the upper part of the driving piston; a lower cavity of the driving piston is communicated with the inlet of the valve through a guide pipe; a balancing spring is arranged in an upper cavity of the driving piston. The balance valve disclosed by the invention is used for adjusting the flow of a medium in heating and ventilation pipelines of an air conditioner and automatically eliminating interference among the branch pipelines in the system and eliminating hydraulic disorder of the system, so that the system is stable in operation and accurate to control the room temperature, and the energy consumption can be remarkably reduced.

Description

technical field [0001] The invention relates to a piston type balance valve. Background technique [0002] Usually, in the operation of air-conditioning and HVAC systems, there is a common phenomenon of hydraulic imbalance in the medium in the pipeline, that is, the inconsistency between the actual flow of the medium in the pipeline at the user end of the heating or cooling system and the design required flow. Uneven heating and cooling in the building, unstable and inaccurate temperature control, not only fail to achieve the purpose of adjusting the temperature to improve the body feeling, but also cause a huge waste of energy. This part of the wasted energy accounts for the total energy consumption of the central air-conditioning system. 8%-15% of the amount. [0003] Generally, there are various valves used to adjust the medium flow in the pipeline of the air conditioning and HVAC system. This type of valve is divided into two types: static balance valve and dynamic bala...

AI Technical Summary

Problems solved by technology

Therefore, it is necessary to install a dynamic balance valve and a static balance valve in the pipeline at the same time to basically realize medium flow regulation and hydraulic balance. It is cumbersome and complicated, not suitable for automatic control, and the adjustment accuracy of the dynamic balance valve is not high

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