Abstract: This article describes a method using a self-operated flow control valve in series with a pressure regulating valve to achieve direct and indirect heating at the upper and lower levels. This method mainly involves the following equipment: pressure pump, check valve, automatic exhaust method, decontamination, self-flow control valve, regulator valve. One of the outstanding performance of the check valve, self-flow control valve, regulator valve, automatic exhaust valve is the main equipment. Keywords: Self-operated flow control valve Regulating valve Direct Heating With the continuous development of the national economy, high-rise buildings in various regions are constantly emerging. For high-rise building heating, there are several commonly used methods: First, separate high-rise buildings set up a boiler and piping to form a separate heating system, this method is safe and reliable, but the initial investment is too large, running The cost is high. Second, a high-rise building with a single heat exchanger, but also the high-level system and low-level system isolated, which requires high-temperature water or steam gas source only economical, so the heat source is not a good solution. If you use the low-temperature water heating system for heat transfer, heating effect is not good. Third, the use of two-tank system, that is, in the high-rise building to set up two tons or dozens of tons of insulation tank and two special tank room, not only to increase project costs, and high water tanks are the beginning of the circulating water dissolved Oxygen greatly increased, resulting in oxygen corrosion of the heating system, at the same time, the circulating water flows in and out of the two tanks several times, with great heat loss. "Gas and heat" in 2005 tenth issue contains an article "high-rise and low-rise building heating equipment application", the article states that "when the pressure inside the energy release device, the water level rises, the water from the siphon automatic drainage Pressure relief pipe to the lower wells, to ensure that the system does not overpressure. "Heat heating people are aware that water is a valuable resource, as the water heating system, after softening, deaeration, heating, even more valuable, Therefore, the method described in the paper has the disadvantage of waste water resources. This article will introduce a self-operated flow control valve and the regulator in series to achieve high and low floor direct heating method. This method mainly involves the following equipment: pressure pump, check valve, automatic exhaust method, decontamination, self-flow control valve, regulator valve. One of the outstanding performance of the check valve, self-flow control valve, regulator valve, automatic exhaust valve is the main equipment. As we all know, to ensure that high-rise buildings and low-rise buildings directly connected to the heating, we must solve the following questions: 1, high-pressure heating pump system only to provide high-pressure area and the appropriate pressure head, can not be excessive, Low water grab the phenomenon. 2, high zone and low zone Whether in operation or in the shutdown state, high pressure in the high area can not be passed to the low area, affecting the safety of the low area, resulting in low area radiator overpressure. 3, hot area users should be filled with water, can not be angry. The function of self-operated flow control valve is to ensure that the circulating water volume in the pipeline is constant, and to eliminate the redundant rich head under the premise of meeting the circulating water volume. The function of the regulator valve is: the pressure after stabilizing the valve is the set value, when the pressure of the valve is increased, the valve is automatically closed, when the valve pressure rises to the set value, the valve is closed and the valve is maintained The pressure is constant. When the system is running, the high-pressure pump in the high-pressure area sends the water supply of the low-pressure area to the hot users in the high-pressure area, and the flow control and constant function of the heating system in the high-pressure area are ensured by the self- Low water yielding into the phenomenon of the occurrence of low-level; through self-flow control valve automatically eliminate the system affluent pressure head function, the high zone of circulating water pressure reduced to the safe pressure inflow area, to ensure the safety of low-zone operating conditions; The essence of eliminating system affluence pressure is to increase the self-operated flow control valve's own resistance, which not only holds the rich pressure in the high zone, but also meets the water filling height of the user system in the high zone. When the system is out of service, due to the static pressure, the water in the high-zone water supply pipe will be closed in the high zone due to the closing of the check valve when flowing back to the low zone. Due to the static pressure, When the water flows to the low zone to increase the pressure in the low zone, the pressure after the valve of the pressure regulating valve will instantly increase. When the set value is reached, the pressure regulating valve will be automatically closed and the return water in the high zone will also be enclosed in the high zone. In this way, in the pressurized pump, check valve, self-flow control valve, pressure valve under the joint cooperation, formed a high-rise buildings and low-rise building direct heating of the new heating form. Using this method for direct heating of high and low floors, without changing the original heating system operating mode, operating parameters and operating conditions, the increase of only a few low-cost heating equipment used in conjunction with, you can achieve high and low The pressure in the district is cut off and operated independently of each other. Compared with other ways in the past, such a solution has the characteristics of simplicity, economy and practicality.
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