CN215801973U

CN215801973U - Industrial underwater underground pipe network constant-pressure water supply system

Info

Publication number: CN215801973U
Application number: CN202121650821.1U
Authority: CN
Inventors: 周金全; 赵磊华; 李勇超; 潘峰; 张志海; 魏树忠; 辛春
Original assignee: Jiayuguan Dayou Jianeng Chemical Co ltd
Current assignee: Jiayuguan Dayou Jianeng Fine Carbon Technology Co ltd
Priority date: 2021-07-20
Filing date: 2021-07-20
Publication date: 2022-02-11
Anticipated expiration: 2031-07-20

Abstract

The utility model discloses a constant-pressure water supply system for an industrial water underground pipe network, which comprises an integrated chip IC1, a water blowing pipe network, an operation stop switch, a fault reset button, a remote pressure gauge and a water pump: a 24V pin of the integrated chip IC1 is connected with a resistor R1, the resistor R1 is connected with a remote pressure gauge, the remote pressure gauge is connected with a variable frequency motor, and the variable frequency motor is connected with a water pump; the pressure of a pipe network is detected by developing the PID adjusting function of the process of the frequency converter and adopting closed-loop control, and the difference value between the set pressure and the system pressure can be automatically adjusted to keep the pressure constant; and a control mode for controlling the outlet pressure of the water pump to be kept constant at a set value when the amount of water used in the water supply pipeline is changed. The system is automatically stopped when the interconnection of an electric contact pressure gauge of the original outlet pipeline and the control system is lower than the set pressure, and the equipment damage caused by the dry rotation of the pump is prevented when the pressure at the inlet of the pipe network is not high.

Description

Industrial underwater underground pipe network constant-pressure water supply system

Technical Field

The utility model relates to the technical field of underground pipe networks, in particular to an industrial underground pipe network constant-pressure water supply system.

Background

In the water supply system, the constant-pressure water supply refers to a control mode of controlling the outlet pressure of a pump to be kept unchanged at a set value when the water consumption in a water supply pipeline is changed by detecting the pressure of a pipe network. When generally using the water pump, the rated flow of the equipment of selecting for use all surpasss actual need's flow usually, and required flow can change among the actual water use process, for example in the production water supply, the water consumption of retaining water filling changes greatly, and it is comparatively general to adopt the mode use that the valve adjusted the flow. Although the method is simple, the method actually achieves the purpose of adjustment by a method of artificially increasing resistance, the throttling adjustment method wastes a large amount of electric energy, the rotating speed of the pump is constant, but the change amount of the outlet pressure of the pump is large and difficult to control due to sudden change of the pressure of a pipe network, or special persons are required to watch and adjust the pressure at any time, so that the labor productivity is low. And the use and maintenance cost of the equipment is high. At present, the factory area production water is provided with 1000 vertical water storage tanks, the number of the water storage tanks is about 10 meters, and the water supply difficulty occurs for a long time, so that the fire-fighting water and the production water in the oil tank area can not meet the requirements. In order to save cost, industrial water is used as production water, but an industrial water pipe network in a water well of a plant area has the defects that the water consumption for greening and irrigating the industrial park in summer is large, the pressure of the pipe network is low, and the water consumption for greening and irrigating the industrial park cannot meet the production water of the plant area, however, the water consumption for greening and irrigating the industrial park in winter is greatly reduced, sometimes, the pressure of the pipe network is suddenly increased, sometimes, the pressure of the pipe network is suddenly reduced, the pressure fluctuation of the industrial water is large, the pressure of an outlet of a pump is too high due to sudden change of the pressure of the pipe network, so that the pipeline pressure is leaked, or the pressure is too low, so that the production requirement cannot be met, and the dry-turning of the pump is caused by no pressure of the pipe network to damage equipment.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a constant-pressure water supply system for an industrial underground water pipe network, which aims to solve the problems in the background art.

In order to achieve the purpose, the utility model provides the following technical scheme: a 10V pin of the integrated chip IC1 is connected with a resistor R1, the resistor R1 is connected with a remote pressure gauge, the remote pressure gauge is connected with a frequency converter analog quantity input control terminal of a motor, and the motor is connected with a water pump; the water inlet of the water pump is connected with the first water inlet and the second water inlet, the water outlet of the water pump is connected with the water outlet pipe network, and the outlet pipeline of the pump is connected with the electric contact pressure gauge and the remote transmission resistance type pressure gauge; the U, V pin and the W pin of the integrated chip IC1 are both connected with a motor; the R, S and the T pin of the integrated chip IC1 are connected with a leakage switch, and the leakage switch is connected with a three-phase power supply; the VS pin and the GND pin of the integrated chip IC1 are both connected with a remote pressure gauge; the X1 pin of the integrated chip IC1 is connected with an operation stop switch; the X7 pin of the integrated chip IC1 is connected with a fault reset button; COM is common and the 16 pin of the IC1 is grounded.

Furthermore, the first water inlet is connected with a water source No. 1 pipeline to be tap water, and the second water inlet is connected with a water source No. 2 pipeline to be industrial water.

Compared with the prior art, the utility model has the beneficial effects that:

1. the system of the utility model enables the equipment to realize constant-pressure variable water supply according to various water supply requirements through the frequency converter and the resistance-type remote transmission pressure gauge; the system can set pressure according to requirements, and automatically adjust the rotating speed of the water pump according to the set pressure, so that the equipment runs in an efficient and energy-saving optimal state.

2. And (3) stabilizing the water supply pressure: the system realizes closed-loop control, can automatically adjust the difference value between the set pressure and the system pressure, and keeps the system pressure constant; the damage of the overhigh outlet pressure to the pipe fittings and equipment is solved.

3. The electric contact pressure gauge of the outlet pipeline is interconnected with the control system, the system automatically stops when the pressure is lower than the set pressure, and the dry rotation of the pump is prevented from causing equipment damage when the pressure at the inlet of the pipe network is not high.

4. The potential safety hazard of low fire fighting water pressure is eliminated, and the fire fighting safety is improved; the frequency of pressure regulating and frequency modulating is reduced, the labor productivity is improved, and the stability and the safety of the system are ensured while the outlet is subjected to constant pressure through automatic frequency modulation.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

In the figure: 1. an integrated chip IC 1; 2. a resistance R; 3. a remote pressure gauge; 4. a variable frequency motor; 5. a water pump; 6. a first water inlet; 7. a second water inlet; 8. a water outlet pipe network; 9. a leakage switch; 10. a three-phase power supply; 11. a running stop switch; 12. a fail reset button.

Detailed Description

The utility model will be further explained and explained with reference to the drawings;

as shown in fig. 1, the industrial water underground pipe network constant-pressure water supply system comprises an integrated chip IC1 (SINE 303), a pin 10V of the integrated chip IC1 is connected with a resistor R1, a resistor R1 is connected with a remote pressure gauge, the remote pressure gauge is connected with a motor frequency converter analog input control terminal, a variable frequency motor is connected with a water pump, a water inlet of the water pump is connected with a first water inlet and a second water inlet, a water outlet of the water pump is connected with a water outlet pipe network, two outlet pipeline pressure measuring points of the pump are provided, one is connected with an electrical contact pressure gauge, and the other is connected with the remote pressure gauge (a remote transmission resistor pressure gauge YTZ-150); the U, V pin and the W pin of the integrated chip IC1 are both connected with a motor; the R, S and the T pin of the integrated chip IC1 are connected with a leakage switch, and the leakage switch is connected with a three-phase power supply; the VS pin and the GND pin of the integrated chip IC1 are both connected with a remote pressure gauge, so that the remote pressure gauge sends detected data to the integrated chip IC 1; an X1(RUN) pin of the integrated chip IC1 is connected with an operation stop switch; the X7(RST) pin of the integrated chip IC1 is connected with a fault reset button; COM is common, and the 16 pins of the IC1 are grounded.

The X1(RUN) running and stopping switch is shared, and the point is that the running is closed, the disconnection is stopped, and the original position is a normally-open point. X7(RST) this point closes the fault reset, the original bit is the normally open point. The electric contact pressure gauge is not shown in the figure, the electric contact pressure gauge is installed on an outlet pipeline of the pump, is together with the remote transmission pressure gauge and is basically at the same position, the control point of the electric contact pressure gauge is a normally closed contact at the original position, is disconnected during protection action and is connected with a loop formed by a frequency converter control loop X1 and COM in series, the remote pressure gauge outputs an analog quantity signal of 0-10V voltage and mainly plays a role in frequency modulation, the electric contact pressure gauge outputs an on-off switching quantity signal and mainly plays a role in protection, and the pressure is lower than the set pressure to stop the machine.

The working principle of the utility model is as follows: the water inlet of the water pump is connected with a first water inlet and a second water inlet, the water outlet of the water pump is connected with a water outlet pipe network, the first water inlet is connected with a water source No. 1 pipeline and is used as running water, the second water inlet is connected with a water source No. 2 pipeline and is used as industrial water, the source respectively uses self pipelines to supply water, a resistance type remote pressure gauge detects the pressure of the pipe network, the remote pressure gauge sends detected outlet pressure data of the water pump to an integrated chip IC1, U, V and a W pin of an IC1 are connected with a variable frequency motor, the variable frequency motor is controlled to change the rotating speed, the pressure of the system is automatically adjusted, and the pressure is kept constant; the outlet pressure for controlling the water pump is kept constant at a set value when the amount of water used in the water supply pipeline is changed. The electric contact pressure gauge of the outlet pipeline is interconnected with the control system, the system automatically stops when the pressure is lower than the set pressure, and the water pump is prevented from rotating when the pressure at the inlet of the pipe network is not high, so that the equipment is prevented from being damaged.

Example 1

The industrial water pressurizing pump works as follows: 1. before starting, the inlet and outlet valves of the pump are opened, the power distribution cabinet is started to operate, the inlet and outlet pressure of the pump is observed, the outlet pressure is 0.6Mpa in normal operation, the current set pressure is 0.6Mpa, and the set pressure can be set as required.

2. And observing whether the pressure of the outlet resistance type pressure gauge of the pump is consistent with the pressure display of the electric contact during inspection at each time, and if the deviation is overlarge, timely repairing, detecting and replacing.

3. When the pressure of the outlet electric contact pressure gauge is lower than 0.2Mpa when the inlet pipeline is not pressurized or the pressure is pressurized in operation, the equipment automatically stops operation, and the pump is prevented from rotating and damaging the equipment.

4. When the pump is in operation, the frequency of the frequency converter changes at any time according to the feedback pressure of the resistance type pressure gauge at the inlet of the pump, the frequency is automatically adjusted and changed, the frequency conversion frequency is controlled to be automatically increased when the pressure at the inlet is low, and the frequency conversion frequency is controlled to be automatically reduced when the pressure at the inlet is high, so that the pressure is always kept at the set pressure of 0.6 Mpa.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the appended claims.

Claims

1. The utility model provides an industrial water underground pipe network constant pressure water supply system, includes integrated chip IC1, its characterized in that: a 10V pin of the integrated chip IC1 is connected with a resistor R1, the resistor R1 is connected with a remote pressure gauge, the remote pressure gauge is connected with a frequency converter analog quantity input control terminal of a motor, and the motor is connected with a water pump; the water inlet of the water pump is connected with the first water inlet and the second water inlet, the water outlet of the water pump is connected with the water outlet pipe network, and the outlet pipeline of the pump is connected with the electric contact pressure gauge and the remote transmission resistance type pressure gauge; the U, V pin and the W pin of the integrated chip IC1 are both connected with a motor; the R, S and the T pin of the integrated chip IC1 are connected with a leakage switch, and the leakage switch is connected with a three-phase power supply; the VS pin and the GND pin of the integrated chip IC1 are both connected with a remote pressure gauge; the X1 pin of the integrated chip IC1 is connected with an operation stop switch; the X7 pin of the integrated chip IC1 is connected with a fault reset button; COM is common and the 16 pin of the IC1 is grounded.

2. The industrial water underground pipe network constant pressure water supply system according to claim 1, wherein: the first water inlet is connected with a water source No. 1 pipeline and is tap water, and the second water inlet is connected with a water source No. 2 pipeline and is industrial water.