Automatic recirculation low-pressure pump protection valve

Abstract

The invention relates to the technical field of pump protection valves and discloses an automatic recirculation low-pressure pump protection valve. The automatic recirculation low-pressure pump protection valve comprises a valve seat, a valve cover and a bypass pipe, wherein the lower end of the valve seat, the upper end of the valve cover and one end, away from the valve seat, of the bypass pipeare fixedly connected with a first flange, a second flange and a third flange respectively; the valve cover is fixedly connected with the upper end of the valve seat; the upper end of the valve seat is fixedly connected with a first connecting plate; the lower end of the valve cover is fixedly connected with a second connecting plate corresponding to the first connecting plate; a plurality of U-shaped fixing plates are uniformly clamped with the exteriors of the first connecting plate and the second connecting plate; and clamping grooves clamped with the U-shaped fixing plates are formed in opposite sides of the first connecting plate and the second connecting plate. The automatic recirculation low-pressure pump protection valve has the advantages that the valve seat and the valve cover are rapidly assembled and disassembled, the valve seat and the bypass pipe are rapidly assembled and disassembled, and the automatic recirculation low-pressure pump protection valve is convenient to maintain and use.

Description

technical field [0001] The invention relates to the technical field of pump protection valves, in particular to an automatic recirculation low pressure pump protection valve. Background technique [0002] Automatic recirculation valve, also known as pump protection valve or minimum flow valve, is used for automatic recirculation of the minimum flow rate of centrifugal pumps to prevent centrifugal pumps from being damaged due to overheating, noise and vibration under low load. It is a pump protection device. It automatically protects the partial cavitation damage and instability that may occur in the pump body when the centrifugal pump (especially conveying hot water medium) is running at low load. [0003] The current automatic recirculation low-pressure pump protection valve is cumbersome and inconvenient to connect to each connection position, which brings great inconvenience to installation, disassembly and maintenance, affects the actual use effect, and cannot well meet ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides an automatic recirculation low-pressure pump protection valve, which can realize quick disassembly and assembly between the valve seat and the valve cover and quick disassembly and assembly between the valve seat and the bypass pipe, which is convenient The advantages of maintenance and use solve the cumbersome and inconvenient connection of the various connection positions of the current automatic recirculation low-pressure pump protection valve, which brings great inconvenience to installation, disassembly and maintenance, affects the actual use effect, and cannot be well satisfied. question of actual needs

Images