CN201803414U - Unattended Central Heating Monitoring Station - Google Patents

Abstract

The utility model relates to an unattended central heating monitor station, which is characterized by mainly comprising a plate type heat exchanger, a variable-frequency water supplementing pump, a circulating pump, an electric regulating valve, a ball valve, a controller and a control cabinet. An inlet and a return port of the plate type heat exchanger are respectively connected with a primary heat supply pipeline and a primary water return pipeline, the electric regulating valve is arranged between the primary heat supply pipeline and the inlet of the plate type heat exchanger, a water outlet and a water return port of the plate type heat exchanger are respectively connected with a secondary heat supply pipeline and a secondary water return pipeline, the controller is connected with an outdoor temperature sensor, a temperature sensor and a pressure sensor, and the temperature sensor and the pressure sensor are respectively connected with the primary heat supply pipeline and the secondary heat supply pipeline. The unattended central heating monitor station has the advantages that the monitor station adopting a full-automatic unattended mode for operation and realizes remote transmission and remote control, a system of the monitor station has the functions of over-temperature, over-pressure and pressure loss chaining protection and warning, temperature of supplied water of a pipe network is controlled according to outdoor temperature change by the controller, and indoor heating temperature is guaranteed.

Description

Unattended Central Heating Monitoring Station

technical field

The utility model belongs to a central heating system, in particular to an unattended central heating monitoring station.

Background technique

In the north of China, the central heating method with the advantages of reducing coal consumption and reducing CO ₂ emissions has been widely used. The current heating network is to divide a large-area heating area into several heating districts, and the entire system is monitored through a centralized heating monitoring system between each district and the heating boiler room. Each district establishes a heating station to monitor the heating supply corresponding to the heating district. Setting up several heating stations between the heating networks will cause a waste of personnel, and the human factors that are difficult to manage due to the absence of duty personnel will directly affect the quality of heating supply, and even accidents will occur. At the same time, due to the large range of temperature changes in winter, the outdoor temperature rises or falls, and the water supply temperature of the pipe network remains unchanged. The temperature difference between the city and the outside cannot be adjusted, resulting in waste of energy.

Utility model content

The purpose of this utility model is to overcome the deficiencies of the above-mentioned technologies, and provide an unattended central heating monitoring station, which adopts a fully automatic unattended mode of operation, can realize remote transmission and remote control functions, and realizes the over-temperature of the system , overpressure, loss of pressure, all have interlock protection and alarm functions; through the temperature controller, the temperature of the water supply of the pipe network can be adjusted with the change of the outdoor temperature to ensure the indoor heating temperature.

In order to achieve the above purpose, the utility model adopts the following technical scheme: an unattended centralized heating monitoring station, which is characterized in that: it is mainly composed of a plate heat exchanger, a frequency conversion water supply pump, a circulation pump, an electric regulating valve, a ball valve, and a control station. The inlet and outlet of the plate heat exchanger are respectively connected to the primary heat supply pipe and the primary return water pipe. An electric regulating valve is installed between the primary heat supply pipe and the inlet of the plate heat exchanger. The water outlet and the water return port of the device are respectively connected with the secondary heating pipeline and the secondary return water pipeline. The controller is connected with an outdoor temperature sensor, a temperature sensor and a pressure sensor, and the temperature sensor and the pressure sensor are respectively connected with the primary heating pipeline and the primary heating pipeline. Secondary heating pipe connection.

The bypass of the secondary return water pipeline is provided with a frequency conversion replenishment water pump and a replenishment water tank.

Ball valves are respectively arranged on the primary heat supply and return water pipelines and the secondary heat supply and return water pipelines.

Beneficial effects: It adopts automatic unattended mode operation, which can realize remote transmission and remote control functions, and realizes the system's over-temperature, over-pressure, loss of pressure, and all have chain protection and alarm functions; The temperature change is used to adjust the water supply temperature of the pipe network to ensure the indoor heating temperature. Traditional heat exchange stations need to be equipped with 2-3 on-duty personnel, but with the fully automatic unattended operation mode, only one patrolling personnel is required for every ten stations, saving a lot of human resources. The on-site controller controls the electric control valve on the primary side according to the outdoor temperature sensor, the return water temperature on the secondary side or the average temperature of the supply and return water on the secondary side, and automatically adjusts the flow of heat medium in the primary network to realize the "quantity" adjustment of the primary network. In this way, the water supply temperature of the secondary network can be further controlled to make it run according to the set mode or curve, so as to realize the "quality" adjustment of the secondary network and reduce the waste of heat. Pressure control, according to the water supply pressure set on the secondary side or the pressure difference between supply and return water, the operating frequency of the circulating water pump is controlled by the frequency converter. According to the set water supply pressure, the operation frequency of the water supply pump is controlled by the frequency converter, which saves the loss of electric energy to the greatest extent. When the system pressure exceeds the set pressure, the solenoid valve opens to discharge water. Realize the hydraulic balance of the heating network and the on-demand distribution of heat, and ensure that the indoor temperature of the near-end users is too high to cause heat waste, and the remote users do not complain, which is the principle of "comfort and energy saving". The unit has compact design, small footprint, convenient installation and operation, and easy maintenance; the equipment has excellent configuration, stable and reliable performance, low vibration and noise, and reduces environmental pollution.

Description of drawings

Fig. 1 is a schematic diagram of system configuration and connection of the present invention.

In the figure: 1. Plate heat exchanger, 2. Frequency conversion water supply pump, 3. Circulation pump, 4. Electric control valve, 5. Ball valve, 6. Controller, 7. Primary heat supply pipeline, 7-1. Primary return water Pipeline, 8, secondary heat supply pipeline, 8-1, secondary water return pipeline, 9, outdoor temperature sensor, 10, temperature sensor, 11, pressure sensor, 12, replenishment water tank.

Detailed ways

The specific implementation of the utility model will be described in detail below in conjunction with the accompanying drawings and preferred embodiments. As shown in the figure, an unattended central heating monitoring station is mainly composed of plate heat exchanger 1, frequency conversion water supply pump 2, circulation pump 3, electric regulating valve 4, ball valve 5, controller 6 and control cabinet (Fig. not shown), the inlet and outlet of the plate heat exchanger are respectively connected to the primary heat supply pipeline 7 and the primary return water pipeline 7-1, and an electric regulating valve is provided between the primary heat supply pipeline and the inlet of the plate heat exchanger 4. The water outlet and water return port of the plate heat exchanger are respectively connected with the secondary heating pipe 8 and the secondary return water pipe 8-1, and the controller is connected with an outdoor temperature sensor 9 and (TE) temperature sensor 10 and (PE) The pressure sensor 11, the temperature sensor and the pressure sensor are respectively connected with the primary heating pipeline and the secondary heating pipeline. The bypass of the secondary return water pipeline is provided with a frequency conversion replenishment water pump 2 and a replenishment water tank 12 . Ball valves 5 are respectively arranged on the primary heat supply and return water pipelines and the secondary heat supply and return water pipelines.

working principle:

The system is connected with the control cabinet, and has interlocking protection and alarm functions for over-temperature, over-pressure and loss of pressure of the heating network system.

Loss of pressure protection: When the return water pressure on the secondary side is lower than the lower limit set value, the water replenishment inverter will wake up, the automatic water replenishment system will be put into operation, and water replenishment will start. After the automatic water supply system is put into operation, if the return water pressure on the secondary side continues to decrease, an alarm will be issued. the

Over-temperature protection: When the water supply temperature on the secondary side exceeds the set value, and when the return water temperature on the primary side exceeds the set value, close the electric control valve on the primary side.

Overpressure protection: The pressure of the water supply main pipe on the secondary side exceeds the set value, the circulation pump stops running and the electric regulating valve on the primary side is closed.

The system has the functions of power failure protection and self-starting when power is received.

Temperature control, the on-site controller controls the electric regulating valve on the primary side according to the outdoor temperature sensor, the return water temperature on the secondary side or the average temperature of the supply and return water on the secondary side, and automatically adjusts the flow of heat medium in the primary network to realize the "quantity" of the primary network adjust. In this way, the water supply temperature of the secondary network can be further controlled to make it run according to the set mode or curve, so as to realize the "quality" adjustment of the secondary network and reduce the waste of heat.

Pressure control, according to the water supply pressure set on the secondary side or the pressure difference between supply and return water, the operating frequency of the circulating water pump is controlled by the frequency converter. According to the set water supply pressure, the operation frequency of the water supply pump is controlled by the frequency converter, which saves the loss of electric energy to the greatest extent. When the system pressure exceeds the set pressure, the solenoid valve opens to discharge water.

Realize the hydraulic balance of the heating network and the on-demand distribution of heat, and ensure that the indoor temperature of the near-end users is too high to cause heat waste, and the remote users do not complain, which is the principle of "comfort and energy saving".

The system is equipped with Grundfos brand circulating pumps and supplementary water pumps, and Finnish navy welded ball valves with low failure rate and maintenance-free for ten years; all on-site transmission instruments are imported to ensure the accuracy of transmission parameters, effectively reducing Later maintenance work.

High thermal efficiency, different heat exchanger plate types are selected according to different parameters to ensure high heat transfer coefficient and improve heat transfer efficiency.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the structure of the present utility model in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present utility model still belong to the scope of the technical solution of the present utility model.

Claims (3)

1. An unattended central heating monitoring station is characterized in that it is mainly composed of a plate heat exchanger, a frequency conversion water supply pump, a circulating pump, an electric regulating valve, a ball valve, a controller and a control cabinet, and the plate heat exchanger The inlet and return ports of the device are respectively connected to the primary heat supply pipe and the primary return water pipe. An electric regulating valve is installed between the primary heat supply pipe and the inlet of the plate heat exchanger. The heat pipe is connected with the secondary return water pipe, and the controller is connected with an outdoor temperature sensor, a temperature sensor and a pressure sensor, and the temperature sensor and the pressure sensor are respectively connected with the primary heat supply pipe and the secondary heat supply pipe. 2. The unattended central heating monitoring station according to claim 1, characterized in that: the bypass of the secondary return water pipeline is provided with a frequency conversion replenishment water pump and a replenishment water tank. 3. The unattended central heating monitoring station according to claim 1, characterized in that: the primary heating and return water pipelines and the secondary heating and return water pipelines are respectively provided with ball valves.

Images