CN207017361U - A kind of electric-control system of constant pressure water supply - Google Patents

Abstract

The utility model discloses an electric control system for frequency conversion and constant pressure water supply, which comprises a water inlet pipe, a solenoid valve, a filter screen, a buffer water tank, a connecting water pipe, a one-way solenoid valve, a water supply tank, a drain pipe, a voltage stabilizing compensator, a first Water supply pipe, second water supply pipe, remote pressure gauge, butterfly valve, motor controller, water pump, water outlet pipe, circuit protection device, programmable controller, frequency converter and connecting pipes. The beneficial effects of the utility model are: the frequency converter is used to carry out cyclic soft start of the water pump, which ensures the stability of the equipment when starting, prolongs the service life of the equipment components, and can monitor the overload, undervoltage, short circuit, phase sequence and other electrical faults, multiple protections and targeted protections are carried out for the electric control system to make the electric control system safer and more reliable. The output frequency of the frequency converter is controlled by the output standard signal of the programmable controller, thereby automatically adjusting the speed of the frequency conversion water pump motor, realizing Closed-loop regulation of pipe network water pressure.

Description

An electronic control system for water supply with variable frequency and constant pressure

technical field

The utility model relates to an electric control system for water supply, in particular to an electric control system for frequency conversion and constant pressure water supply, which belongs to the field of water supply systems.

Background technique

Due to the shortage of water resources and electric energy in our country, the water supply quality of public pipe networks such as high-rise residential buildings, municipal buildings and industrial circulation is extremely important. This situation is particularly obvious during peak and low peaks of water consumption. For example, during peak water consumption, because the supply of water is lower than the demand of users, the water pressure decreases and the supply exceeds demand. In the case of oversupply, energy will be wasted, and even damage to water equipment such as water pipe bursts will occur.

The existing water supply methods include constant speed pump direct water supply method, constant speed pump water tower water supply method, jet pump water tank water supply method, constant speed pump high water tank water supply method, constant speed pump air pressure tank water supply method, etc. The control systems of these water supply methods are A non-closed-loop control system is difficult to self-regulate according to the water consumption of users in various time periods, resulting in waste of water resources and electric energy, and equipment such as water pumps work under high load for a long time, reducing the service life of equipment.

Utility model content

The purpose of this utility model is to provide an electric control system for frequency conversion and constant pressure water supply in order to solve the above problems.

The utility model achieves the above object through the following technical solutions: an electric control system for variable frequency constant pressure water supply, including water inlet pipe, solenoid valve, filter screen, buffer water tank, connecting water pipe, one-way solenoid valve, water supply tank, drain pipe, Voltage stabilizing compensator, first water supply pipe, second water supply pipe, remote pressure gauge, butterfly valve, motor controller, water pump, water outlet pipe, circuit protection device, programmable controller, frequency converter and connecting pipe; on the water inlet pipe A solenoid valve is provided, the solenoid valve is connected to the programmable controller, a buffer water tank is provided at the bottom of the water outlet of the water inlet pipe, a filter screen is provided inside the buffer water tank, and a connecting water pipe is provided at the bottom of the buffer water tank , the communicating water pipe is provided with a one-way solenoid valve, the one-way solenoid valve is connected with the programmable controller, the other end of the communicating water pipe is connected with the upper end of the water supply tank, and the bottom of the water supply tank is provided with Connecting pipe, the other end of the connecting pipe communicates with the drain pipe, one end of the drain pipe is provided with a voltage stabilizing compensator, the other end of the drain pipe is connected to the water inlet end of the first water supply pipe and the second water supply pipe The first water supply pipe is provided with a remote pressure gauge, a butterfly valve and a water pump in sequence, and the second water supply pipe is provided with a butterfly valve and a water pump in sequence, and the water pump and the motor controller are electrically connected together. The water outlets of the first water supply pipe and the second water supply pipe are connected to the water outlet pipe, and a remote pressure gauge is arranged on the water outlet pipe, and the remote pressure gauge is electrically connected to the programmable controller, and the motor controller and the circuit protection device Electrically connected, the circuit protection device is electrically connected to the frequency converter, and the frequency converter is connected to the programmable controller.

Further, in order to prevent sundries from entering the water supply system and to facilitate cleaning, the inside of the buffer tank is equipped with a filter.

Further, in order to enhance the self-adjustment ability of the water storage system and reduce the adjustment time of the system, the buffer water tank and the water supply tank are connected to form a secondary water storage system.

Further, in order to ensure that the pressure inside the water supply tank does not leak out, the communication water pipe is arranged between the buffer water tank and the water supply tank, and the valve provided on the communication water pipe is a one-way one-way solenoid valve.

Further, in order to adjust the amount of water supplied according to demand, the water outlet pipe is supplied with water by two water supply pipes, the first water supply pipe and the second water supply pipe.

Further, in order to know the pressure and water volume of the water supply in real time, the second water supply pipe and the water outlet pipe are provided with remote pressure gauges for measuring the water pressure of the pipeline.

Further, in order to ensure the stability when the water pump is started, the frequency converter controls the action of the water pump by controlling the motor controller.

Further, in order to make the electric control system safer and more reliable, the circuits of the inverter and the motor controller are provided with circuit protection devices.

Further, in order to automatically adjust the speed of the variable frequency water pump motor, the programmable controller is used to control the frequency converter.

The beneficial effects of the utility model are: the electric control system of frequency conversion and constant pressure water supply is easy to use and reasonable in design, the filter screen in the buffer water tank can be disassembled freely, and the filter screen can prevent sundries from entering the water supply system, thereby causing system damage and blockage , and the filter screen is detachable for easy cleaning. The buffer water tank and the water supply tank are connected to form a secondary water storage system, which enhances the self-regulation ability of the water storage system and reduces the adjustment time of the entire system output water volume. The buffer water tank and the water supply tank The valves set on the connecting water pipes between the water supply tanks are one-way one-way solenoid valves, which can ensure that the pressure inside the water supply tanks does not leak out and ensure the water supply pressure of the water supply tanks. The outlet pipe is composed of the first water supply pipe and the second water supply pipe. The water supply of two water supply pipelines can adjust the supply of water according to the demand. When the water demand is large, the use of two water supply can effectively ensure the water volume and pressure of the water supply. When the water consumption is small, one pipeline can be closed. One pipeline is used to supply water to reduce the waste of water resources. The second water supply pipe and the outlet pipe are respectively equipped with remote pressure gauges for measuring the water pressure of the pipeline, which can grasp the pressure and water volume of the water supply in real time, and use the differential pressure method to judge whether it is necessary Two-way water supply is adopted, and the frequency converter controls the start of the water pump by controlling the motor controller. The frequency converter is used to cycle and soft start the water pump, which ensures the stability of the equipment when starting, and prolongs the service life of the equipment components. The frequency converter and motor control The circuit of the circuit breaker is equipped with a circuit protection device, which can monitor the electrical faults of the entire electric control system such as overload, undervoltage, short circuit, phase sequence, etc., and provide multiple protection and targeted protection for the electric control system to make the electric control system safer and more reliable. The frequency converter is controlled by the signal of the programmable controller, and the output frequency of the frequency converter is controlled by the standard signal output by the programmable controller, so as to automatically adjust the speed of the variable frequency water pump motor, realize the closed-loop adjustment of the water pressure of the pipe network, and make the water supply system automatically constant pressure Based on the set pressure value, it meets the user's requirements for water pressure and water volume, and at the same time achieves the purpose of improving water supply quality and water supply efficiency.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the utility model;

In the figure: 1. Water inlet pipe, 2. Solenoid valve, 3. Filter screen, 4. Buffer water tank, 5. Connecting water pipe, 6. One-way solenoid valve, 7. Water supply tank, 8. Drainage pipe, 9. Voltage stabilization compensation Device, 10, first water supply pipe, 11, first water supply pipe, 12, remote pressure gauge, 13, butterfly valve, 14, motor controller, 15, water pump, 16, water outlet pipe, 17, circuit protection device, 18, can Programming controller, 19, frequency converter, 20, connecting pipe.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Figure 1, an electric control system for frequency conversion and constant pressure water supply, including water inlet pipe 1, solenoid valve 2, filter screen 3, buffer water tank 4, connecting water pipe 5, one-way solenoid valve 6, water supply tank 7, and drain pipe 8 , voltage regulator compensator 9, first water supply pipe 10, second water supply pipe 11, remote pressure gauge 12, butterfly valve 13, motor controller 14, water pump 15, water outlet pipe 16, circuit protection device 17, programmable controller 18, Frequency converter 19 and connecting pipe 20; described water inlet pipe 1 is provided with electromagnetic valve 2, and described electromagnetic valve 2 is connected with programmable controller 18, and the bottom of water outlet of described water inlet pipe 1 is provided with buffer water tank 4, so The interior of the buffer water tank 4 is provided with a filter screen 3, the filter screen 3 in the buffer water tank 4 can be disassembled freely, that is, the filter screen 3 is movable in the buffer water tank 4, and the bottom of the buffer water tank 4 is provided with a connecting water pipe 5 , the communication water pipe 5 is provided with a one-way solenoid valve 6, the one-way solenoid valve 6 is connected with the programmable controller 18, the other end of the communication water pipe 5 is connected with the upper end of the water supply tank 7, the The buffer water tank 4 communicates with the water supply tank 7 to form a secondary water storage system. The bottom of the water supply tank 7 is provided with a connecting pipe 20, and the other end of the connecting pipe 20 communicates with the drain pipe 8. One end of the pipe 8 is provided with a voltage stabilizing compensator 9, and the other end of the drain pipe 8 communicates with the water inlet ends of the first water supply pipe 10 and the second water supply pipe 11, and the first water supply pipe 10 is sequentially provided with Remote pressure gauge 12, butterfly valve 13 and water pump 15, described second water supply pipe 11 is provided with butterfly valve 13 and water pump 15 in turn, described water pump 15 and motor controller 14 are electrically connected together, described first water supply pipe 10, The water outlet end of the second water supply pipe 11 communicates with the water outlet pipe 16, and the remote pressure gauge 12 is arranged on the water outlet pipe 16, and the remote pressure gauge 12 and the programmable controller 18 are electrically connected together, and the motor controller 14 is electrically connected with the circuit protection device 17, and the circuit protection device 17 is electrically connected with the frequency converter 19, and the frequency converter 19 controls the start of the water pump 15 by controlling the motor controller 14, and the frequency converter 19 and the programmable The controller 18 is connected, and the frequency converter 19 is controlled by the signal of the programmable controller 18 .

As a technical optimization scheme of the present utility model: the valve provided on the connecting water pipe 5 between the buffer water tank 4 and the water supply tank 7 is a one-way one-way solenoid valve 6; 10 and the second water supply pipe 11 are two water supply pipelines for water supply; the second water supply pipe 11 and the water outlet pipe 16 are each provided with a remote pressure gauge 12 for measuring the water pressure of the pipeline; the frequency converter 19 controls the motor controller 14 so as to control the start of the water pump 15; the circuit of the frequency converter 19 and the motor controller 14 is provided with a circuit protection device 17; the frequency converter 19 is controlled by the signal of the programmable controller 18.

When the utility model is in use, first connect the water inlet pipe to the water supply pipeline in the previous step, connect the water outlet pipe to the pipeline to be supplied with water, then connect electrical equipment such as water pumps to the power supply, and then download the written program to the programmable Inside the controller, water supply with frequency conversion and constant pressure can be realized. The programmable controller PLC outputs standard signals to control the output frequency of the frequency converter, thereby automatically adjusting the speed of the frequency conversion water pump motor, realizing the closed-loop adjustment of the water pressure of the pipe network, and making the water supply system automatically constant. When the water consumption increases, the frequency increases, the pump speed increases, and the water supply increases accordingly; when the water consumption decreases, the frequency decreases, the pump speed slows down, and the water supply decreases accordingly.

It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from all points of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to fall within the scope of the claims All changes within the meaning and range of equivalents of the required elements are included in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (9)

1. An electric control system for frequency conversion and constant pressure water supply, characterized in that it includes a water inlet pipe (1), a solenoid valve (2), a filter screen (3), a buffer water tank (4), a connecting water pipe (5), a one-way Solenoid valve (6), water supply tank (7), drain pipe (8), voltage regulator compensator (9), first water supply pipe (10), second water supply pipe (11), remote pressure gauge (12), butterfly valve (13), motor controller (14), water pump (15), outlet pipe (16), circuit protection device (17), programmable controller (18), frequency converter (19) and connecting pipe (20); The water inlet pipe (1) is provided with a solenoid valve (2), the solenoid valve (2) is connected to the programmable controller (18), and the bottom of the water outlet of the water inlet pipe (1) is provided with a buffer water tank (4 ), the interior of the buffer water tank (4) is provided with a filter screen (3), the bottom of the buffer water tank (4) is provided with a communicating water pipe (5), and the communicating water pipe (5) is provided with a one-way solenoid valve ( 6), the one-way solenoid valve (6) is connected with the programmable controller (18), the other end of the communicating water pipe (5) is connected with the upper end of the water supply tank (7), and the water supply tank (7) ) is provided with a connecting pipe (20), the other end of the connecting pipe (20) communicates with the drain pipe (8), and one end of the drain pipe (8) is provided with a voltage stabilizing compensator (9), so The other end of the drain pipe (8) communicates with the water inlet ends of the first water supply pipe (10) and the second water supply pipe (11), and the first water supply pipe (10) is sequentially provided with remote pressure gauges (12 ), a butterfly valve (13) and a water pump (15), the second water supply pipe (11) is sequentially provided with a butterfly valve (13) and a water pump (15), and the water pump (15) is electrically connected to the motor controller (14) Together, the water outlets of the first water supply pipe (10), the second water supply pipe (11) and the water outlet pipe (16) are connected, and the water outlet pipe (16) is provided with a remote pressure gauge (12), so The remote pressure gauge (12) is electrically connected to the programmable controller (18), the motor controller (14) is electrically connected to the circuit protection device (17), and the circuit protection device (17) is connected to the frequency converter (19) Electrically connected, the frequency converter (19) is connected with the programmable controller (18). 2. The electronic control system for frequency conversion and constant pressure water supply according to claim 1, characterized in that: a filter screen (3) is installed inside the buffer water tank (4). 3. The electronic control system for variable frequency constant pressure water supply according to claim 1, characterized in that: the buffer water tank (4) and the water supply tank (7) are connected to form a secondary water storage system. 4. An electronic control system for frequency conversion and constant pressure water supply according to claim 3, characterized in that: the communication water pipe (5) is arranged between the buffer water tank (4) and the water supply tank (7), and the communication water pipe ( 5) The valve provided on the top is a one-way one-way solenoid valve (6). 5. The electronic control system for variable frequency constant pressure water supply according to claim 1, characterized in that: the outlet pipe (16) is supplied by two water supply pipes (10) and second (11) pipeline water supply. 6. An electronic control system for variable frequency constant pressure water supply according to claim 1, characterized in that: the second water supply pipe (11) and the water outlet pipe (16) are both provided with remote control devices for measuring the water pressure of the pipeline. Pressure gauge (12). 7. The electronic control system for variable frequency constant pressure water supply according to claim 1, characterized in that: the frequency converter (19) controls the action of the water pump (15) by controlling the motor controller (14). 8. The electronic control system for variable frequency constant pressure water supply according to claim 1, characterized in that: the circuit of the frequency converter (19) and the motor controller (14) is provided with a circuit protection device (17). 9. The electronic control system for variable frequency constant pressure water supply according to claim 1, characterized in that: the programmable controller (18) is used to control the frequency converter (19).