CN205991009U - The pump group constant pressure water supply control system of no pressure sensor - Google Patents

Abstract

The invention discloses a pump set constant pressure water supply control system without a pressure sensor, relating to a pump set constant pressure water supply control system. At present, in the constant pressure water supply control system of the pump set, the method of pressure sensor and frequency converter is usually used for pressure control. The traditional constant pressure water supply control system has low reliability and high maintenance cost in the later period. The utility model comprises a pump set controller, an integrated frequency conversion motor connected with the pump set controller and an intelligent motor unit, and a water pump connected with the integrated frequency conversion motor and the intelligent motor set; , a storage module for the corresponding relationship between power and speed, and a processor connected to the storage module for selecting the corresponding power and speed according to the expected pressure. The data for constant-pressure water supply provided by the storage module facilitates the processor to obtain the corresponding power and speed data through the externally set expected pressure data to perform constant-pressure water supply without obtaining data through the sensor, which saves the cost of the sensor.

Description

Pump set constant pressure water supply control system without pressure sensor

technical field

The utility model relates to a pump group constant pressure water supply control system, in particular to a pump group constant pressure water supply control system without a pressure sensor.

Background technique

At present, in the constant pressure water supply control system of the pump set, the method of adding a pressure sensor and a frequency converter is usually used for pressure control. The pressure sensor automatically recognizes the change of the outlet pressure of the water pump, and transmits the signal to the frequency converter. After receiving the pressure signal, the frequency converter realizes the pressure control through the internal PID regulator, and then adjusts the speed of the water pump to realize the constant pressure of the water pump outlet. purpose of control.

In the traditional constant pressure water supply control scheme, the purchase cost of the pressure sensor accounts for 20%-50% of the entire constant pressure water supply control system. During daily use, the sedimentation and slag in the pipeline, ambient temperature and humidity will easily cause the sensor to work abnormally. When wiring, it is necessary to pass the cable through the waterproof joint and tighten the sealing nut. Long-term use will often cause seal loosening and water leakage. Such phenomena require periodic maintenance, which greatly reduces the reliability of the traditional constant pressure water supply control system, and at the same time significantly increases the maintenance cost in the later period.

Utility model content

The technical problem to be solved and the technical task proposed by the utility model are to perfect and improve the existing technical solutions, to provide a pump set constant pressure water supply control system without a pressure sensor, with the purpose of realizing the constant pressure water supply of the pump set without a pressure sensor . For this reason, the utility model takes the following technical solutions.

A pump set constant pressure water supply control system without a pressure sensor, including a pump set controller, an integrated variable frequency motor connected to the pump set controller and an intelligent motor set, and a water pump connected to the integrated variable frequency motor and the intelligent motor set; The pump set controller is provided with a storage module for storing the corresponding relationship between pressure, power and speed, and a processor connected with the storage module for selecting the corresponding power and speed according to the expected pressure. The data for constant-pressure water supply provided by the storage module facilitates the processor to obtain the corresponding power and speed data through the externally set expected pressure data to perform constant-pressure water supply without obtaining data through the sensor, which saves the cost of the sensor.

As a further improvement and supplement to the above technical solution, the utility model also includes the following additional technical features.

It also includes an input and output module connected with the pump set controller for inputting and displaying expected pressure data for performing constant pressure water supply. The input and output module facilitates the input of expected pressure values and operating displays so that the processor obtains the expected pressure data required for execution.

The input-output module is a human-computer interaction device with a display screen. Input the expected pressure data through the human-computer interaction device including the display screen, with good interactivity.

The display screen is a touch screen. The touch screen has two-way interaction capability of display and input, which can reduce the complexity of the structure and reduce the cost.

It also includes a remote control terminal connected with the pump set controller for inputting expected pressure data and realizing remote control and monitoring. The remote terminal facilitates remote entry of desired pressure values to be performed and facilitates monitoring.

A MODBUS and/or GPRS communication module for remote communication is provided between the remote control terminal and the pump set controller. MODBUS and GPRS communication modules are mature in technology, widely used, relatively low in cost, and can use the existing network to realize remote monitoring.

A drive control circuit is provided between the pump set controller and the motor set, and the pump set controller controls the working state of the corresponding motor set through the drive control circuit. The pump set controller is convenient to control the operation of the motor set through the drive control circuit.

The drive control circuit includes a contactor and/or a relay, and the pump unit controller is connected to the contactor and/or relay through an IO interface circuit to control the working state of the corresponding motor unit. Contactors and relays are relatively reliable and simple electronically controlled switching elements with mature technology and widely used.

The motor unit includes a plurality of intelligent motors with control devices, and the integrated frequency conversion motor is a frequency conversion system integrating a frequency converter and a motor. Through the pump set controller, the water pump system with single frequency conversion and multiple motors can be realized, which reduces the frequency converter and effectively reduces the cost.

A pump set controller is connected with an integrated variable frequency motor and 2 to 6 intelligent motors. Reasonable quantity and high cost performance.

Beneficial effects: the system performs constant-pressure water supply by inputting the expected pressure value and comparing it with the processor to obtain the corresponding power and speed from the storage module. The pressure sensor is removed, the installation and maintenance of the pressure sensor are eliminated, and the pressure is greatly saved. Sensor costs and maintenance expenditures.

Description of drawings

Fig. 1 is the structural representation of the utility model.

detailed description

The technical solution of the utility model is described in further detail below in conjunction with the accompanying drawings of the description.

As shown in Figure 1, the pump set constant pressure water supply control system without a pressure sensor includes a pump set controller, an integrated variable frequency motor connected to the pump set controller and an intelligent motor set, and an integrated variable frequency motor connected to the intelligent motor set The water pump; the pump set controller is provided with a storage module for storing the corresponding relationship between pressure, power and speed, and a processor connected with the storage module for selecting the corresponding power and speed according to the expected pressure. The data for constant-pressure water supply provided by the storage module facilitates the processor to obtain the corresponding power and speed data through the externally set expected pressure data to perform constant-pressure water supply without obtaining data through the sensor, which saves the cost of the sensor.

In order to obtain the expected pressure value for constant pressure water supply, it also includes an input and output module connected with the pump set controller for inputting and displaying the expected pressure data for constant pressure water supply. The input and output module facilitates the input of expected pressure values and operating displays so that the processor obtains the expected pressure data required for execution.

In order to achieve better interactive operation, the input and output module is a human-computer interaction device with a display screen. Input the expected pressure data through the human-computer interaction device including the display screen, with good interactivity. In order to realize convenient two-way interaction, the display screen is a touch screen. The touch screen has two-way interaction capability of display and input, which can reduce the complexity of the structure and reduce the cost.

In order to facilitate remote monitoring and operation, it also includes a remote control terminal connected to the pump set controller for inputting expected pressure data and realizing remote control and monitoring. The remote terminal facilitates remote entry of desired pressure values to be performed and facilitates monitoring.

In order to facilitate remote connection, MODBUS and/or GPRS communication modules for remote communication are provided between the remote control terminal and the pump set controller. MODBUS and GPRS communication modules are mature in technology, widely used, relatively low in cost, and can use the existing network to realize remote monitoring.

In order to control the operation of the motor unit conveniently, a drive control circuit is provided between the pump unit controller and the motor unit, and the pump unit controller controls the working state of the corresponding motor unit through the drive control circuit. The pump set controller is convenient to control the operation of the motor set through the drive control circuit.

In order to improve the working reliability of the drive circuit, the drive control circuit includes a contactor and/or a relay, and the pump set controller is connected to the contactor and/or relay through an IO interface circuit to control the working state of the corresponding motor set. Contactors and relays are relatively reliable and simple electronically controlled switching elements with mature technology and widely used.

In order to reduce the use of frequency converters and reduce costs, the motor unit includes 4 intelligent motors with control devices, and the integrated frequency conversion motor is a frequency conversion system integrating frequency converters and motors. Through the pump set controller, the water pump system with single frequency conversion and multiple motors can be realized, which reduces the frequency converter, effectively reduces the cost, and is cost-effective.

Before the constant pressure water supply, the remote control terminal as the host computer sets a constant pressure value, and the processor obtains the relevant parameters such as the output power and speed to be executed by comparing the constant pressure value with the pressure preset value data in the storage module Carry out control execution. When the control is executed, the controller of the pump unit controls the opening of the integrated frequency conversion motor and the motor unit for constant pressure water supply according to relevant parameters such as power and speed. The number and power of the motor units are calculated by the pump unit controller.

The pump set constant pressure water supply control system without pressure sensor shown in Figure 1 above is a specific embodiment of the utility model, which has already reflected the substantive features and progress of the utility model, and can be used according to actual needs in the utility model Under the inspiration of the present invention, the equivalent modification of its shape, structure and other aspects are all within the scope of protection of this scheme.

Claims (10)

1. no pressure sensor pump group constant pressure water supply control system it is characterised in that：Control including pump group controller and pump group The integral type frequency conversion motor that device connects is with intelligent electric machine unit, the water that is connected with integral type frequency conversion motor and intelligent electric machine unit Pump；Described pump group controller is provided with for storing pressure, power, the memory module of speed corresponding relation and memory module phase It is connected to select the processor of corresponding power and speed according to expecting pressure.

2. no pressure sensor according to claim 1 pump group constant pressure water supply control system it is characterised in that：Also include The input/output module for inputting and showing execution constant pressure water supply expecting pressure data being connected with pump group controller.

3. no pressure sensor according to claim 2 pump group constant pressure water supply control system it is characterised in that：Described Input/output module is the human-computer interaction device with display screen.

4. no pressure sensor according to claim 3 pump group constant pressure water supply control system it is characterised in that：Described Display screen be touch screen.

5. no pressure sensor according to claim 2 pump group constant pressure water supply control system it is characterised in that：Also include Be connected with pump group controller for expecting pressure data input and can achieve remotely control and supervision remote control terminal.

6. no pressure sensor according to claim 5 pump group constant pressure water supply control system it is characterised in that：Described Remote MODBUS and/or the GPRS communication module being equipped between control terminal and pump group controller for telecommunication.

7. no pressure sensor according to claim 1 pump group constant pressure water supply control system it is characterised in that：Described It is provided with drive control circuit, described pump group controller passes through drive control circuit between pump group controller and motor unit The working condition of corresponding motor unit.

8. no pressure sensor according to claim 7 pump group constant pressure water supply control system it is characterised in that：Described Drive control circuit includes catalyst and/or relay, and pump group controller passes through I/O interface circuitry and catalyst and/or relay It is connected to control the working condition of corresponding motor unit.

9. no pressure sensor according to claim 1 pump group constant pressure water supply control system it is characterised in that：Described Motor unit includes the intelligent electric machine of multiple stage tape controller part, and described integral type frequency conversion motor is converter and motor integration Frequency conversion system.

10. no pressure sensor according to claim 9 pump group constant pressure water supply control system it is characterised in that：One pump Group controller is connected with an integral type frequency conversion motor and 2～6 intelligent electric machines.