Diaphragm expansion tank for water network pressure compensation

Abstract

The invention relates to the technical field of expansion tanks, in particular to a diaphragm expansion tank for water network pressure compensation. The diaphragm expansion tank comprises an expansion tank body, a gas bag is arranged in the expansion tank body, a support plate is fixedly connected to the exterior of the gas bag, and a support spring is fixedly connected to the exterior of the support plate; and a pressure sensor is arranged on the left side of the support spring, the left side of the expansion tank body is fixedly connected with a gas charging and discharging opening, and thetop of the expansion tank body is fixedly connected with a gas pressure meter. According to the diaphragm expansion tank for water network pressure compensation, the support spring is arranged outside the gas bag, the support spring is used for supporting the support plate to balance the pressure formed by expansion of the gas bag, the gas bag is extruded conveniently when the pressure of a waternetwork is reduced, water in the gas bag is conveyed into the water network, and the situation that the pressure in the water network is reduced too fast is avoided; and the problem that the water pressure cannot be compensated due to excessive gas leakage in a traditional expansion pipe is solved.

Description

technical field [0001] The invention relates to the technical field of expansion tanks, in particular to a diaphragm expansion tank for water network pressure compensation. Background technique [0002] The expansion tank is a kind of gas pressure in the expansion tank is greater than the water pressure when the water loss pressure is reduced. At this time, the gas expands and squeezes out the water in the airbag to replenish the system. The working principle of the expansion tank is: When the expansion tank is in the air bag, the nitrogen sealed in the tank is compressed. According to Boyle’s gas law, the volume of the gas becomes smaller after being compressed, and the pressure increases until the gas pressure in the expansion tank reaches the same pressure as the water. When the water loss pressure decreases, the gas pressure in the expansion tank is greater than the water pressure, and the gas expands to squeeze out the water in the air bag to replenish the system. [0...

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Problems solved by technology

[0003] During the use of the existing expansion tank, the gas inside the expansion tank will gradually overflow over time. When the gas inside the expansion tank is too small, the air pressure is not enough to balance the pressure of the water in the air bag, resulting in the failure of the expansion tank. It affects the normal use of the expansion tank, and the existing expansion tank cannot see whether the gas is sufficient, and can only be inflated at regular intervals based on experience, and the gas content inside the expansion tank cannot be controlled. For this reason, we provide a water network pressure compensation Diaphragm expansion tank

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