Elastic ground hydrant

Abstract

The invention provides an elastic aboveground fire hydrant, which relates to a fire hydrant, in particular to a fire hydrant with anticollision function. The fire hydrant at least comprises a fire hydrant body, a reducer pipe, a fire hydrant connecting water pipe, a valve stem and a check valve, and is characterized in that the fire hydrant also comprises a rubber joint pipe and a rubber cross joint; the fire hydrant body and the rubber joint pipe, the rubber joint pipe and the reducer pipe, as well as the reducer pipe and the fire hydrant connecting water pipe are connected through flanges respectively; the check valve is arranged in the reducer pipe; and one end of the valve stem is connected with an opening mechanism of the check valve through the rubber cross joint, and the other end of the valve stem extends to the top of the fire hydrant body. Because both an external structure and an internal structure of the fire hydrant have elasticity, the fire hydrant can effectively counteract destructive power caused by collision, so as to prevent the fire hydrant from breaking.

Description

technical field [0001] The invention relates to a fire hydrant, in particular to a fire hydrant with anti-collision function. Background technique [0002] At present, the above-ground fire hydrant commonly used in China is composed of a fire hydrant body, a reducing pipe, a fire hydrant connecting pipe, a valve stem and a one-way valve. They are respectively connected by flanges, the one-way valve is arranged in the reducing pipe, one end of the valve stem is connected with the opening mechanism of the one-way valve, and the other end extends to the top of the fire hydrant body. When the fire hydrant is installed, the 10 cm end of the fire hydrant body is the dividing line, the fire hydrants of the above part are set above the ground surface, and the rest of the fire hydrants are all buried below the ground surface. Because fire hydrants are generally made of cast iron, if they are affected by external forces, they may break, resulting in a large amount of water loss, and ...

AI Technical Summary

Problems solved by technology

However, 200720017096.8 also has many defects: 1. It only changes the rigid external structure of the fire hydrant, but does not consider that the internal structure of the fire hydrant is also rigid, so it cannot actually realize the purpose of its own invention; The connector replaces the reducing tube, and the reducing tube not only assumes the role of reducing the diameter, but also assumes the role of installing the one-way valve. After the reducing tube is improved into a universal soft connector, the installation of the one-way valve must be re-solved. 3. According to the common sense of fire hydrant installation, we know that the universal flexible connector part of the invention is buried underground. First, this part will not break due to impact, and there is no need for elastic improvement. The underground universal flexible connector cannot perform elastic function at all because it is filled with soil around; 4. Although the bellows in the universal flexible connector are made of stainless steel bellows, its structure, material and thickness determine its Anti-corrosion, anti-aging, and anti-pressure properties cannot meet the requirements of fire hydrants. Bellows are usually used as telescopic adjustment pipes for thermal expansion and contraction of water pipes in existing tap water supply systems, rather than pressure pipes; 5. Complex structure , high production cost

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