Adjusting valve capable of adjusting prestress

Abstract

The invention discloses an adjusting valve capable of adjusting prestress. The adjusting device is composed of a valve seat, a valve element, a spring and a valve sleeve, wherein a valve seat throughhole penetrating through the valve seat is formed in the valve seat; an internal thread is arranged on the inner wall of one end, close to a water outlet end, of the valve seat through hole; correspondingly, a matched external thread is arranged outside the valve sleeve; a positioning flange is arranged on the inner wall of the valve seat between the internal thread of the valve seat and a water inlet end, and the aperture of the valve seat through hole between the positioning flange and the water inlet end is gradually increased; and a plurality of auxiliary water channels which are sunken outwards are arranged on the inner wall of the valve seat through hole between the positioning flange and the water inlet end. A certain pressure loss is generated for high-pressure water supply of different pressure, and relatively stable water yield is formed. When the water pressure is too large and a valve body abuts against the positioning flange, no water flows out of drainage holes, and onlya main water channel can discharge the water, therefore, the effect of controlling the flow is achieved, and waste of water resources is avoided.

Description

technical field [0001] The invention belongs to a regulating valve capable of regulating prestress and belongs to the field of flow control valves. Background technique [0002] Usually, the faucet meets the maximum flow rate of 9 liters per minute at a pipe diameter of 15 mm and a water pressure of 0.1 MPa. However, when the water pressure exceeds 0.1 MPa, the flow rate increases with the increase of the water pressure, and generally reaches 14 to 18 liters at a water pressure of 0.2 MPa. / min, and reach 15-23 liters / min under 0.3MPa water pressure. Most of the water supply pressure is greater than 0.1MPa, or even greater than 0.2MPa, so the actual flow of this faucet is greater than the appropriate water flow (for most water methods, the best flow of the faucet is 6-8 liters / minute ), there is a serious overpressure outflow phenomenon, resulting in a waste of water resources. [0003] Gas pipelines such as natural gas also have the same problems as water pipelines. [0...

AI Technical Summary

Problems solved by technology

Most of the water supply pressure is greater than 0.1MPa, or even greater than 0.2MPa, so the actual flow of this faucet is greater than the appropriate water flow (for most water methods, the best flow of the faucet is 6-8 liters / minute ), there is a serious overpressure outflow phenomenon, resulting in waste of water resources

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