Circulating water pump centralized control adjusting device

Abstract

The utility model relates to the technical field of remote centralized control and adjustment of circulating water pumps in the heat power industry, in particular to a centralized control and adjustment device for circulating water pumps. According to the centralized control and adjustment device for the circulating water pump, the time-phased centralized control function of the circulating water pump is added through secondary development of upper software; the operation scheduling personnel of the heat enterprise can set the operation frequency of the circulating water pump of each heat station in different time periods in advance through computer upper software in a scheduling center according to the change condition of the outdoor temperature and the operation working condition of the heat station; the upper software automatically issues a set frequency instruction to the PLC in the heating station in different time periods according to the setting of a dispatcher, then the PLC sends a control instruction to the circulating frequency converter, and finally, the circulating frequency converter controls the circulating water pump to change the operation frequency into the frequency set by the dispatcher, so that the utilization rate of the circulating frequency converter is increased, and the working efficiency is improved. And the power consumption of the circulating water pump is reduced, so that the heat consumption is indirectly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of remote centralized control and regulation of circulating water pumps in the thermal power industry, in particular to a centralized control and regulation device for circulating water pumps. Background Art

[0002] In the heating system, the power consumption of the heating station is mainly concentrated on the operation of the secondary network circulating water pump. Although the circulating water pumps of the heating stations of most heating companies are equipped with circulating frequency converters, the regulation of the circulating water pumps is very rough. Basically, they run at one frequency at the beginning and end of heating, and at one frequency all the time during the cold season. The circulating water pumps of some heating companies even run at a fixed frequency throughout the entire heating period. The frequency conversion function of the circulating frequency converter is far from being fully utilized.

[0003] However, the outdoor temperature changes every day, and even the temperature difference between day and night varies greatly. In the past, the manual adjustment method could not keep up with the changes in the outdoor temperature, resulting in a large waste of energy. Therefore, a time-sharing centralized control and adjustment device for circulating water pumps based on upper software is proposed. Utility Model Content

[0004] The purpose of the present utility model is to provide a centralized control and adjustment device for a circulating water pump, so as to solve the problem that the method proposed in the above background technology that relies solely on manual adjustment cannot keep up with the changes in outdoor temperature, resulting in a large amount of energy waste. In order to achieve the above purpose, the present utility model provides the following technical solutions: a centralized control and adjustment device for a circulating water pump, comprising a bottom plate, the top of which is fixedly connected to a frequency conversion cabinet, the top of which is rotatably connected to a control knob, the control knob is electrically connected to the frequency conversion cabinet, a control host computer is arranged on the outside of the frequency conversion cabinet, a circulating frequency converter cabinet is arranged on the outside of the frequency conversion cabinet, a circulating frequency converter main body is fixedly connected to the bottom of the inner wall of the circulating frequency converter cabinet, and a control panel is arranged on the front of the circulating frequency converter main body.

[0005] Further preferably, a PLC controller is fixedly connected to the top of the inner wall of the cyclic inverter cabinet, and a circulating water pump support frame is arranged on the outer side of the cyclic inverter cabinet.

[0006] Further preferably, a circulating water pump body is fixedly connected to the top of the circulating water pump support frame, a liquid inlet end on the right side of the circulating water pump body is fixedly connected to an inlet pipe, and a liquid outlet end on the left side of the circulating water pump body is fixedly connected to an outlet pipe.

[0007] Further preferably, the control host computer is electrically connected to a PLC controller, and the PLC controller is electrically connected to a circulating water pump body.

[0008] Further preferably, the frequency setting of the main body of the circulating frequency converter can be remotely set through a PLC controller, the PLC controller program is completely self-debugged, and communicates with the control host computer through TCP or the Internet of Things, executes the control instructions issued by the control host computer, and designs a time-sharing control function interface for the circulating water pump by developing the host software. By writing the background script of the host software, the circulating water pump frequency instruction set by the dispatcher can be issued to the PLC in time periods.

[0009] Further preferably, the operating frequency of the circulating water pump body is set by the main body of the circulating frequency converter and then adjusted and controlled. By wiring and debugging the PLC program, the frequency of the circulating frequency converter can be controlled by the PLC. By debugging the circulating frequency converter, the circulating frequency converter can control the frequency of the circulating water pump.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] In the utility model, a time-division centralized control function of the circulating water pump is added through secondary development of the upper software. The operation dispatching personnel of the thermal power enterprise can set the operating frequency of the circulating water pump of each thermal power station in different time periods in advance through the upper computer software at the dispatching center according to the changes in the outdoor temperature and the operating conditions of the thermal power station. The upper software will automatically send the set frequency instructions to the PLC in the thermal power station in different time periods according to the settings of the dispatching personnel. The PLC will then give the control instructions to the circulating frequency converter. Finally, the circulating water pump is controlled by the circulating frequency converter to change the operating frequency to the frequency set by the dispatching personnel, which improves the utilization rate of the circulating frequency converter, reduces the power consumption of the circulating water pump, and thus indirectly reduces the heat consumption.

[0012] In the utility model, the upper software can be installed on any computer in the company. The thermal power company can install the upper software on the computer of the head office dispatching center, the branch company dispatching center or the central thermal power station according to its own situation and production needs, and conduct secondary development of the upper software to design the function of centralized control of the circulating water pump in different time periods. In this way, the dispatching personnel can use the upper software to set the frequency of the circulating water pump in different time periods in advance, so that the circulating pump can run at its set frequency during the set time period, and the circulating water pump can be remotely controlled and adjusted in different time periods through the upper software. The use of this device can save a lot of manpower, and at the same time greatly reduce the power consumption of the thermal power station, indirectly reduce the heat consumption, and because it is combined with the upper software, the timeliness, accuracy and reliability of the adjustment are also greatly improved. The application of automatic control technology makes it possible to fine-tune the adjustment of multiple frequencies in one day.

[0013] In the utility model, through the reasonable use of the dispatching personnel, the actual electricity consumption during the heating period can be greatly reduced, which plays a role in energy saving, electricity saving and lowering electricity bills. The circulating water pump is controlled by the circulating inverter to change the operating frequency to the frequency set by the dispatching personnel, thereby improving the utilization rate of the circulating inverter. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure of the frequency conversion cabinet of the utility model;

[0015] Figure 2 This is a three-dimensional structural diagram of the cyclic frequency converter cabinet of the utility model;

[0016] Figure 3 This is a schematic diagram of the three-dimensional structure of the main body of the circulating water pump of the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of a logic flow chart for the centralized time-division control and regulation function of the upper software circulating water pump of the utility model;

[0018] Figure 5 This is a schematic diagram of the frequency structure for different time periods of the thermal power station of the utility model;

[0019] Figure 6 This is a schematic diagram of the control logic flow structure of the utility model.

[0020] In the figure: 1. Base plate; 2. Frequency conversion cabinet; 3. Control knob; 4. Control host computer; 5. Circulation frequency converter cabinet; 6. Circulation frequency converter main body; 7. Control panel; 8. PLC controller; 9. Circulation water pump support frame; 10. Circulation water pump main body; 11. Inlet pipe; 12. Outlet pipe. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-Figure 6The utility model provides a technical solution: a centralized control and adjustment device for a circulating water pump, comprising a bottom plate 1, a frequency conversion cabinet 2 is fixedly connected to the top of the bottom plate 1, a control knob 3 is rotatably connected to the top of the frequency conversion cabinet 2, the control knob 3 is electrically connected to the frequency conversion cabinet 2, a control host computer 4 is arranged on the outside of the frequency conversion cabinet 2, a circulating frequency converter cabinet 5 is arranged on the outside of the frequency conversion cabinet 2, a circulating frequency converter main body 6 is fixedly connected to the bottom of the inner wall of the circulating frequency converter cabinet 5, and a circulating frequency converter main body 6 is arranged on the front of the circulating frequency converter main body 6. There is a control panel 7, a PLC controller 8 is fixedly connected to the top of the inner wall of the circulating frequency converter cabinet 5, a circulating water pump support frame 9 is arranged on the outside of the circulating frequency converter cabinet 5, a circulating water pump body 10 is fixedly connected to the top of the circulating water pump support frame 9, the liquid inlet end on the right side of the circulating water pump body 10 is fixedly connected to an inlet pipe 11, and the liquid outlet end on the left side of the circulating water pump body 10 is fixedly connected to an outlet pipe 12, the control host computer 4 is electrically connected to the PLC controller 8, and the PLC controller 8 is electrically connected to the circulating water pump body 10.

[0023] In this embodiment, Figure 1 , Figure 2 and Figure 3 As shown, the frequency setting of the main body 6 of the circulating inverter can be remotely set through the PLC controller 8. The PLC controller 8 program is completely self-debugged, and communicates with the control host computer 4 through TCP or the Internet of Things, executes the control instructions issued by the control host computer 4, and the operating frequency of the circulating water pump body 10 is set by the main body 6 of the circulating inverter and then adjusted and controlled.

[0024] The use method and advantages of the utility model: The circulating water pump centralized control regulating device, when in use, the working process is as follows:

[0025] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, by switching the remote / local control knob 3 of the frequency conversion cabinet 2, the local control mode of the circulating water pump body 10 is changed to the remote centralized control mode by the dispatching platform. The instructions given by the control host computer 4 can be executed by the main body 6 of the circulating frequency converter. The dispatching personnel give different control strategies for the circulating water pump frequency of each thermal power station in the centralized control interface of the circulating water pump body 10 of the upper software according to the different conditions of each thermal power station such as the different heating methods, heating areas, heating radius, building insulation conditions, etc. of each user supplied by each thermal power station, combined with the outdoor temperature, so that the circulating water pump can run at different frequencies in each time period. According to the changes in the outside temperature during the day and night, and the changes in sunshine during the day, the circulating water pump main body can be more accurately controlled. The main body 10 frequency, for example, a thermal power station base frequency is 45Hz. In the morning when people just get up, they are more sensitive to room temperature. We can increase the main body 10 frequency of the circulating water pump by 2Hz to 47Hz; when people go to work or school and there is no one at home, reduce it by 2Hz and set it to 43Hz; at noon, the outside temperature is high and the sunshine is strong, so the main body 10 frequency of the circulating water pump can be lowered by 7Hz to 38Hz; in the afternoon, the temperature is higher than in the morning and it is working time, so the main body 10 frequency of the circulating water pump can be reduced by 5Hz to 40Hz; when people get off work and the outside temperature drops, it can be appropriately increased by 3Hz to 43Hz; when people fall asleep at night, it returns to the base frequency of 45Hz.

[0026] The above shows and describes the basic principle, main features and advantages of the utility model. Technical staff in this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A circulating water pump centralized control and regulation device, comprising a base plate (1), characterized in that: The top of the base plate (1) is fixedly connected to a frequency conversion cabinet (2), the top of the frequency conversion cabinet (2) is rotatably connected to a control knob (3), the control knob (3) is electrically connected to the frequency conversion cabinet (2), a control host computer (4) is arranged on the outside of the frequency conversion cabinet (2), a cyclic frequency converter cabinet (5) is arranged on the outside of the frequency conversion cabinet (2), a cyclic frequency converter main body (6) is fixedly connected to the bottom of the inner wall of the cyclic frequency converter cabinet (5), and a control panel (7) is arranged on the front of the cyclic frequency converter main body (6).

2. A circulating water pump centralized control and regulation device according to claim 1, characterized in that: A PLC controller (8) is fixedly connected to the top of the inner wall of the circulating frequency converter cabinet (5), and a circulating water pump support frame (9) is arranged on the outer side of the circulating frequency converter cabinet (5).

3. A circulating water pump centralized control and regulation device according to claim 2, characterized in that: A circulating water pump body (10) is fixedly connected to the top of the circulating water pump support frame (9); a liquid inlet end on the right side of the circulating water pump body (10) is fixedly connected to an inlet pipe (11); and a liquid outlet end on the left side of the circulating water pump body (10) is fixedly connected to an outlet pipe (12).

4. A circulating water pump centralized control and regulation device according to claim 3, characterized in that: The control host computer (4) is electrically connected to a PLC controller (8), and the PLC controller (8) is electrically connected to a circulating water pump body (10).

5. A circulating water pump centralized control and regulation device according to claim 4, characterized in that: The frequency setting of the main body (6) of the cyclic frequency converter can be remotely set via a PLC controller (8); the program of the PLC controller (8) is completely self-debugged, and communicates with the control host computer (4) via TCP or the Internet of Things, and executes control instructions issued by the control host computer (4).

6. A circulating water pump centralized control and regulation device according to claim 5, characterized in that: The operating frequency of the circulating water pump body (10) is set by the circulating frequency converter main body (6) and then adjusted and controlled.

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