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Self operated flow control valve and pressure stabilizing valve are used in series to realize direct heating of high and low floors

this paper will introduce a method of using self operated flow control valve and pressure stabilizing valve in series to realize direct heating of high and low floors. This method mainly involves the following equipment: booster pump, check valve, automatic exhaust method, dirt remover, self operated flow control valve, pressure stabilizing valve. Among them, the check valve, self operated flow control valve, pressure stabilizing valve and automatic exhaust valve with excellent performance are the main equipment. Key words: self operated flow control valve pressure stabilizing valve direct heating

with the continuous development of the national economy, high-rise buildings in various regions continue to emerge. For the heating of high-rise buildings, the following methods are commonly used: first, set up a separate boiler and pipeline for high-rise buildings to form an independent heating system. This method is safe and reliable, but the initial investment is too large and the operation cost is also high. The second is to set up a single heat exchanger for high-rise buildings, which also isolates the high-rise system from the low-rise system. This requires high-temperature water or steam source to be economical, so the heat source problem is not easy to solve. If the low-temperature water of the low-temperature district heating system is used for heat exchange, the heating effect is not good. The third is to use the double water tank system, that is, to set up two thermal insulation water tanks of several tons or dozens of tons and two special water tank rooms in the high-rise building, which not only increases the project cost, but also the high-level water tank starts, which greatly increases the dissolved oxygen in the circulating water and causes the oxygen corrosion of the heating system. At the same time, the circulating water flows in and out of the two water tanks for many times, resulting in great heat loss

an article "Application of connecting heating devices between high-rise and low-rise buildings" was published in the 10th issue of gas and heat in 2005, which said that "when the internal pressure of the energy release device rises, its water level rises, and the water flows from the siphon automatic drainage pressure relief pipe to the well to ensure that the system does not overpressure." People who are engaged in heating know that water is a valuable resource. As water in the heating system, it is more valuable after softening, deoxidizing and heating. Therefore, the method introduced in this paper has the disadvantage of wasting heating water resources

this paper will introduce a method of using self operated flow control valve and pressure stabilizing valve in series to realize direct heating of high and low floors. This method mainly involves the following equipment: booster pump, check valve, automatic exhaust method, dirt remover, self operated flow control valve, rotor pump pressure stabilizing valve. Among them, the check valve, self operated flow control valve, pressure stabilizing valve and automatic exhaust valve with excellent performance are the main equipment. As we all know, in order to ensure the direct heating of high-rise buildings and low-rise buildings, the following problems must be solved:

1. The booster pump of the heating system in the high-rise area can only provide the high-rise area with appropriate flow and appropriate pressure head, and it cannot be excessive, causing the phenomenon of water grabbing for the low-rise area

2. Whether in operation or shutdown, the high-pressure pressure in the high area cannot be transferred to the low area, affecting the safety of the low area and causing the overpressure of the radiator in the low area

3. High area heat users should be full of water and not have air

the function of the self operated flow control valve is to ensure that the circulating water volume of the pipeline is constant and to eliminate the excess excess head on the premise of meeting the circulating water volume

the function of the pressure stabilizing valve is to stabilize the pressure behind the valve as the set value. When the pressure behind the valve rises, the valve will be automatically closed. When the pressure behind the valve rises to the set value, the valve will be closed to maintain the constant pressure behind the valve

when the system is running, the booster pump in the high area will send the water supply in the low area to the heat users in the high area, and the flow control and constant function of the heat supply system in the high area through the self operated flow control valve ensures that the booster pump in the high area will not compete for water in the low area; The self operated flow control valve automatically eliminates the function of the system's abundant pressure head, reduces the circulating water pressure in the high area to the safe pressure and flows into the low area, ensuring the safety when the sample in the low area is bent until the line is broken and cannot be energized; The essence of eliminating the system margin pressure is to increase the self resistance of the self operated flow control valve, which not only suppresses the margin pressure in the high area, but also meets the water filling height of the user system in the high area. When the system is shut down, due to the static pressure, when the water in the water supply pipeline in the high area flows back to the low area, it will be closed in the high area due to the closing of the check valve; Also due to the static pressure, when the water in the return pipe of the high area flows to the low area and the pressure in the low area increases, the pressure behind the pressure stabilizing valve will increase instantly. When the set value is reached, the pressure stabilizing valve will close automatically, which has great commercial potential, and the return water in the high area will also be closed in the high area. In this way, under the cooperation of booster pump, check valve, self operated flow control valve and pressure stabilizing valve, a new form of direct heating between high-rise buildings and low-rise buildings has been formed

this method is used for direct heating of high and low floors. Without changing the operation mode, operation parameters and operation conditions of the original heating system, only adding several low-cost heating equipment can realize the pressure isolation of high and low areas, and the operation does not affect each other. Compared with other methods in the past, this scheme is simple, economical and practical