CN205481238U - High level directly allies oneself with heating system - Google Patents

Abstract

The utility model discloses a high-rise direct-connected heating system, the heating system comprises a high-rise heating cycle unit and a PLC automatic control unit, the PLC automatic control unit comprises a data collector, a booster pump operation controller and a PLC control arithmetic unit, the data collector includes a primary network backwater data acquisition device and a high-level backwater data acquisition device arranged on both sides of the high-level backwater decompression device, and the high-level backwater decompression device is composed of a balance valve and an electric pressure reducing device. The pressure valve is connected in series, the electric pressure reducing valve is an electric pressure reducing valve controlled by the PLC automatic control unit to perform analog input, and the high-level direct-connected heating system automatically adjusts the high-level return water reduction according to the real-time return water pressure of the primary network. The pressure valve matches the return water pressure of the upper layer with the return water pressure of the primary network. While ensuring the normal circulation of the high area, it does not affect the heat supply of the low area, and the degree of automation is high.

Description

A high-rise direct-connected heating system

technical field

The invention relates to a direct-connection heating system, in particular to a high-rise direct-connection heating system for heating high-rise users.

Background technique

The return water decompression equipment in the high-rise direct-connected heating system in the prior art is mainly composed of a mechanical decompression valve, a flow balance valve, an electric shut-off valve, and a backup power supply. When this high-rise direct-connected heating system is working, the pressure behind the valve of the mechanical pressure reducing valve needs to be adjusted according to the return water pressure of the primary network. Usually when the pressure behind the valve is slightly higher than the return water pressure of the primary network, the whole system can operate normally. In an ideal state, the pressure of the return water of the primary network is constant. At this time, adjusting the pressure behind the pressure reducing valve can ensure the normal operation of the whole system. However, the pressure of the return water of the primary network in the actual operation process There are certain changes. When the return water pressure of the primary network is greater than or equal to the pressure behind the pressure reducing valve, it will cause blockage of the return water in the high area. Make the high area unable to supply heat normally. And when the return water pressure of the primary network is lower than the pressure behind the pressure reducing valve, it will be difficult to return water in the low area, so that the low area cannot return water and affect the heating safety of the entire low area. Therefore, in order to meet the heating requirements in the high direct-coupled heating system using a mechanical pressure reducing valve, on-site personnel need to continuously adjust the pressure reducing valve, which brings great inconvenience to the staff, so that the quality of heating is very low . In addition, electric butterfly valves are used as blocking valves in this high-rise direct-connected heating system. When a sudden power failure occurs, in order to ensure the safety of the system, it is necessary to use a backup power supply to power the electric valve. Once the backup power supply fails, It will cause all the water in the high area to pour back into the low area, causing great damage to the heating system in the entire low area.

Utility model content

The technical problem to be solved by the utility model is: to overcome the above-mentioned defects in the prior art, and provide a high-rise direct-connected heating system, which can automatically adjust the high-rise return water decompression according to the real-time return water pressure of the primary network. The valve matches the return water pressure of the upper layer with the return water pressure of the primary network. While ensuring the normal circulation of the high area, it does not affect the heat supply of the low area, and the degree of automation is high.

The technical solution adopted to solve the technical problem: a high-rise direct-connected heating system, including a high-rise heating circulation unit and a PLC automatic control unit, the high-rise heating circulation unit includes primary network water supply pipes, Booster pump, high-level user terminal, high-level return water decompression device, primary network return water pipe, the PLC automatic control unit includes a data collector, a booster pump operation controller and a PLC central control calculator, and the data collector includes The primary network backwater data acquisition device and the high-rise backwater data acquisition device are arranged on both sides of the high-rise backwater decompression device. The high-rise backwater decompression device is composed of a balance valve and an electric pressure relief valve in series. The electric pressure relief valve The pressure valve is an electric decompression valve controlled by the PLC automatic control unit to perform analog input.

The electric decompression valve is a power-off reset type electric decompression valve.

The data collector also includes a primary network water supply data collection device and a high-level water supply data collection device arranged on both sides of the booster pump.

The return water pipe behind the valve of the high-level backwater decompression device is connected with a primary network overpressure protection drain pipe, and a solenoid valve controlled by a PLC automatic control unit is arranged on the overpressure protection drain pipe.

Beneficial effects: the high-rise direct-connected heating system of the present utility model adopts the high-rise direct-connected heating system including a high-rise heating circulation unit and a PLC automatic control unit, and the high-rise return water decompression device is composed of a balance valve and a PLC The automatic control unit is controlled by an electric pressure reducing valve that performs analog input. By collecting the backwater data on both sides of the high-rise backwater pressure reducing device in real time, and automatically calculating and analyzing the collected data, the electric pressure reducing valve is adjusted according to the calculation results. pressure valve, so that the return water pressure of the upper layer is automatically matched with the return water pressure of the primary network. While ensuring the normal circulation of the high area, it does not affect the heat supply of the low area. It is the technical feature of the power-off reset type electric pressure reducing valve. When the power grid suddenly fails, the electric pressure reducing valve will automatically close, and it can automatically block the water in the high area in the high area without human intervention, and will not affect the low area Any impact, no need for backup power supply, maintenance-free can be achieved; due to the adoption of the data collector also includes the technical characteristics of the primary network water supply data acquisition device and the high-level water supply data acquisition device arranged on both sides of the booster pump, on the one hand it realizes Pressurize according to the water supply pressure of the primary network, make full use of the pressure of the primary network, and reduce the power consumption of the booster pump. On the other hand, when the primary network equipment is shut down, the PLC automatic control unit detects that the water pressure in the high area is lower than the set value When the holding pressure value is reached, the booster pump will be started automatically, and the equipment will stop automatically when the set pressure is reached, so as to maintain a constant water pressure in the high area, avoiding the drop of water pressure in the high area, causing air to enter the top layer pipeline, and causing the top layer to be unheated, which also overcomes the problem The high-rise direct-connection heating system in the prior art has no automatic pressure maintaining function, and it can only be turned on all day for the stability of the system. The technical characteristics of the overpressure protection drainage pipe of the primary network are connected to the return water pipeline after the valve of the high-rise return water decompression device, and the solenoid valve controlled by the PLC automatic control unit is arranged on the overpressure protection drainage pipe. When the system detects When the return water pressure of the primary network exceeds the warning pressure, the PLC automatic control unit controls the solenoid valve to automatically drain and release pressure to avoid damage to the heating system, making the high-level direct-connected heating system of the utility model work safer and run more stably.

Description of drawings

Fig. 1 is a schematic diagram of the high-rise direct-coupled heating system of the present invention.

detailed description

As shown in Figure 1, the high-rise direct-connected heating system of the present invention includes a high-rise heating circulation unit and a PLC automatic control unit 3. Water supply pipe 1, booster pump 5, high-level user terminal 11, high-level return water pressure reducing device, primary network return pipe 2, and multiple valves 10, decontamination device 4, pressure gauge 9, soft connection 6, etc., the high-level The backwater decompression device is composed of a balance valve 15 and an electric decompression valve connected in series. The electric decompression valve is a power-off reset type electric decompression valve 14 controlled by a PLC automatic control unit that performs analog input. The return water pipeline behind the valve of the decompression device is connected with a primary network overpressure protection drain pipe 12, and an electromagnetic valve 13 controlled by a PLC automatic control unit is arranged on the overpressure protection drain pipe.

The PLC automatic control unit includes a data collector, a booster pump operation controller and a PLC central control calculator, and the data collector includes a primary network return water data acquisition device and a high-level The backwater data acquisition device, the primary network water supply data acquisition device and the high-level water supply data acquisition device arranged on both sides of the booster pump, each data acquisition device is composed of a temperature sensor 8 and a pressure sensor 7, due to the use of the data The acquisition device is composed of a temperature sensor and a pressure sensor, so that the high-rise direct-connected heating system of the utility model can also reasonably determine the heating parameters according to the water supply temperature of the primary network and the return water temperature of the high-rise, so as to ensure the normal heating of users and save heat supply Reduce the power consumption of the system and reduce the heating cost. The operation controller of the booster pump is a frequency conversion device that receives the instruction signal sent by the central control arithmetic unit to adjust and increase the operation parameters of the pump.

When the high-rise direct-connected heating system of the utility model is running, each data acquisition device transmits the water temperature and pressure signals in the pipeline to the PLC central control arithmetic unit in real time, and the PLC central control arithmetic unit performs calculation, and then the PLC automatic control unit Output control signals to the booster pump and electric pressure reducing valve according to the calculation results, control the start/stop and speed of the booster pump, control the opening of the electric pressure reducing valve, and automatically adjust the backwater pressure of the upper layer.

Claims (4)

1. A high-level direct-coupled heating system, comprising a high-level heating cycle unit and a PLC automatic control unit, the high-level heating cycle unit comprising a primary network water supply pipe, a booster pump, and a high-level user terminal connected in sequence by pipelines , a high-level return water decompression device, a primary network return water pipe, the PLC automatic control unit includes a data collector, a booster pump operation controller and a PLC central control calculator, and it is characterized in that: the data collector includes a The primary network backwater data acquisition device and the high-level backwater data acquisition device on both sides of the backwater decompression device. The high-level backwater decompression device is composed of a balance valve and an electric pressure relief valve in series. The electric pressure relief valve is Electric pressure reducing valve with analog input controlled by PLC automatic control unit. 2. The high-rise direct-connected heating system according to claim 1, characterized in that: the electric pressure reducing valve is a power-off reset type electric pressure reducing valve. 3. The high-rise direct-connected heating system according to claim 1 or 2, characterized in that: the data collector also includes primary network water supply data collection devices and high-rise water supply data collection devices arranged on both sides of the booster pump. 4. The high-rise direct-connected heating system according to claim 3, characterized in that: a primary network overpressure protection drain pipe is connected to the return water pipeline after the high-rise return water pressure reducing device valve, and the overpressure protection drain pipe Equipped with a solenoid valve controlled by a PLC automatic control unit.