Low-resistance non-return valve

Abstract

The invention relates to a low-resistance non-return valve. The low-resistance non-return valve is characterized by being provided with a valve body and a valve cover connected with the valve body, wherein a check valve is arranged in a cavity formed by the valve body and the valve cover; the end parts of the valve body and the valve cover have a water inlet and a water outlet respectively; the central lines of the water inlet and the water outlet are consistent with the central line of the check valve; the check valve comprises a valve seat, a valve core matched with the valve seat, a valve rod connected to the valve core and a guide sleeve which is in sliding fit with the valve rod; a spring I is arranged between the guide sleeve and the valve core; a radial triangular groove is formed at the downstream end of the valve rod; the guide sleeve consists of an inner ring and an outer ring; the inner ring is connected with the outer ring through connecting ribs; a through hole is drilled in the center of each connecting rib; a steel ball, a spring II and an adjustment screw are arranged in the through hole in sequence; and the steel ball acts on an inclined surface on the left side of the triangular groove of the valve rod under the condition that the valve core is closed. The low-resistance non-return valve is low in energy consumption, and the sealing performance is not influenced.

Description

technical field [0001] The invention relates to a valve, in particular to a low-resistance check valve. Background technique [0002] In the pipeline system conveying liquid medium, for various reasons, in order to prevent the medium from flowing back, check valves are commonly used. In an ordinary check valve, the spring presses the valve core so that the valve core is pressed tightly on the corresponding valve seat to achieve sealing. The size of the pressing force is determined by the sealing requirements. The disadvantage of this kind of check valve is: when the valve is opened, as the flow rate increases, the opening of the valve core increases, the opening of the valve core increases, the spring compression increases, and the spring force also increases proportionally, that is, the flow rate of the medium increases. The flow resistance increases proportionally, so more energy must be consumed, especially for large-diameter check valves with high sealing requirements....

AI Technical Summary

Problems solved by technology

The disadvantage of this kind of check valve is: when the valve is opened, as the flow rate increases, the opening of the valve core increases, the opening of the valve core increases, the spring compression increases, and the spring force also increases proportionally, that is, the flow rate of the medium increases. The flow resistance increases proportionally, so more energy must be consumed, especially for large-diameter check valves with high sealing requirements.

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