A low-torque self-sealing fire hydrant

Abstract

The invention relates to a low-torque self-sealing fire hydrant. The fire hydrant comprises a hydrant body, wherein the hydrant body is provided with an inlet water interface, a tray is fixedly arranged near the inlet water interface, a valve shaft is inserted in the tray, and the valve shaft is connected with a valve base by virtue of a thread; the outer side of the valve base is arranged in a guide cylinder, the inner wall of the valve base is provided with a unidirectional valve used for enabling fluid to flow to outside of the valve base from the inside of the valve base, the cylinder wall of the guide cylinder is provided with a through hole communicated with the outside, and by virtue of rotating the valve shaft, the valve base is away from or close to the tray, so as to open or close the inlet water interface. The fire hydrant is used for realizing the on and off of the fluid and flow regulation, a big torque caused by the high pressure is reduced during opening, and whole dithering caused by the impacting of the high-pressure fluid on the parts is decreased; and when the fire hydrant is closed, the part damage caused by a water hammer formed by pressure fusion is alleviated.

Description

technical field [0001] The invention relates to fire fighting equipment, in particular to a low-torque self-sealing fire hydrant. Background technique [0002] At present, the disadvantages of fire hydrants on the market are that the force bearing area of ​​the seal is large, and the guide of the moving seal is short. When opening, the torque is particularly large, and the pressure on both sides of the seal changes greatly, which is prone to vibration; when closing, it is easy to generate water hammer, which will damage the fire hydrant; once the above-ground part is accidentally damaged after closing, due to the short guide of the moving seal And inclined, so that the seal failure. Contents of the invention [0003] The object of the present invention is to solve the above technical problems and provide a low-torque self-sealing fire hydrant. [0004] To achieve the above object, the technical solution of the present invention is: [0005] A low-torque self-sealing fir...

AI Technical Summary

Problems solved by technology

When opening, the torque is particularly large, and the pressure on both sides of the seal changes greatly, which is prone to vibration; when closing, it is easy to generate water hammer, which will damage the fire hydrant; once the above-ground part is accidentally damaged after closing, due to the short guide of the moving seal tilted, making the seal ineffective

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