CN118911243A - Flood prevention and drainage system for reclaimed water output pump house and early warning method thereof - Google Patents

Abstract

The invention discloses a flooding prevention and drainage system of a reclaimed water output pump house and an early warning method thereof, relating to the field of water supply, comprising a water collecting well which is arranged in the pump house; the submersible sewage pump is arranged in the water collecting well; the liquid level floating ball switch is arranged in the water collecting well and connected with the submersible sewage pump and is used for monitoring the liquid level in the water collecting well; the ultrasonic liquid level meter is used for detecting the liquid level of the water collecting well; the signal acquisition module is connected with the ultrasonic liquid level meter and the submersible sewage pump, acquires analog quantity signals of the ultrasonic liquid level meter and switching value signals of the submersible sewage pump and transmits the analog quantity signals and the switching value signals to the upper computer; the upper computer is connected with the signal acquisition module and the alarm; according to the invention, the first re-monitoring and automatic drainage are carried out on the water level in the water collecting well through the liquid level float switch and the submersible sewage pump, the ultrasonic liquid level meter, the signal acquisition module and the upper computer are matched, the state of the submersible sewage pump is combined, the second re-monitoring and automatic early warning are carried out on the liquid level and drainage condition in the pump room, and the operation safety of the reclaimed water output pump room is improved.

Description

A flood prevention and drainage system for a reclaimed water external transmission pump house and its early warning method

Technical Field

The present invention relates to the field of water supply, and in particular to a flood prevention and drainage system for a reclaimed water export pump house and an early warning method thereof.

Background Art

During the construction of water supply systems, pump rooms are often built in residential areas, factories and other areas, and water supply equipment such as booster water supply units and control cabinets are installed in the pump rooms. The municipal pipe network is connected to the user pipe network through the booster water supply unit. However, during the water supply process, due to long-term operation of the booster water supply unit, motor vibration, aging of seals, corrosion and perforation of pipes, failure of check valves and other reasons, water pumps and pipes are prone to leakage and sewage backflow.

In order to prevent the equipment in the pump room from being damaged by flooding, a water collection well is often dug in the pump room to store water from pump leakage or backflow of sewage and rainwater. However, the existing water collection well has limited water storage capacity, and due to design requirements, the ground elevation of the pump room is low. If the pump or pipeline leaks seriously, or the rainfall is heavy during the rainy season, it is very easy to cause the water in the water collection well to exceed the specified water level, and the pump room still has the problem of equipment being damaged by flooding. At present, the existing relevant flood prevention and drainage measures in the pump room cannot meet the requirements for safe operation of the pump room.

Summary of the invention

In view of the deficiencies in the above-mentioned prior art, the present invention provides a flood prevention and drainage system for a reclaimed water export pump room and an early warning method thereof, which can realize dual monitoring and automatic early warning of the pump room liquid level, improve the operational safety of the reclaimed water export pump room, and reduce equipment losses caused by sudden failures.

In order to achieve the above object, the present invention adopts one or more of the following technical solutions:

In a first aspect, a flood prevention and drainage system for a reclaimed water transmission pump house is provided, comprising:

The water collection well is set in the pump room to store the water leaking from the pump room;

A submersible sewage pump is arranged in the water collection well and is used to discharge sewage in the well;

A liquid level float switch is arranged in the water collection well and connected to the submersible sewage pump to monitor the liquid level in the water collection well and control the automatic start and stop of the submersible sewage pump;

An ultrasonic level meter is arranged above the water collection well and is used to detect the liquid level in the water collection well and transmit a liquid level signal;

A signal acquisition module is connected to the ultrasonic level meter and the submersible sewage pump, collects the liquid level signal of the ultrasonic level meter and the start and stop status of the submersible sewage pump, and uploads them to the host computer;

The host computer is connected to the signal acquisition module and the alarm.

As a further implementation, a PVC electric ball valve is further included. The electric ball valve is arranged on the outlet pipe of the submersible sewage pump to prevent sewage backflow when the check valve on the outlet pipe fails.

As a further implementation method, the submersible sewage pump is connected to a control box arranged outside the sump. The control box is respectively connected to the submersible sewage pump, the liquid level float switch and the PVC electric ball valve, and is used to manually or automatically control the start and stop of the submersible sewage pump.

As a further implementation method, an AC contactor is provided in the control box, and the coil of the AC contactor is connected in series with the contacts of the liquid level float switch. When the liquid level detected by the liquid level float switch reaches the set liquid level height, the contacts of the liquid level float switch close, and the AC contactor is then energized, thereby controlling the submersible sewage pump to start drainage.

As a further implementation method, the AC contactor is provided with an auxiliary contact, which is connected in series in the control circuit of the PVC electric ball valve and is used to control the PVC electric ball valve and the submersible sewage pump in linkage; when the submersible sewage pump starts, the PVC electric ball valve opens at the same time; when the submersible sewage pump stops, the PVC electric ball valve closes.

As a further implementation method, inspection valves are respectively arranged at the front end and the rear end of the PVC electric ball valve on the outlet pipeline for inspection work of the electric ball valve.

As a further implementation, a bypass ball valve connected in parallel with the electric ball valve is also provided on the outlet pipeline for emergency manual operation when the electric ball valve fails.

As a further implementation, the ultrasonic level meter is connected to the water collection well by installing a conduit to ensure that the ultrasonic level meter can receive effective echoes, thereby improving the accuracy of liquid level measurement.

As a further implementation method, a through hole is opened on the top side wall of the installation conduit so that the liquid level in the installation conduit is always level with the liquid level in the water collection well, further ensuring the accuracy of liquid level detection.

As a further implementation, the control box is provided with a manual control button, which can manually control the start and stop of the submersible sewage pump.

On the other hand, a flood prevention and drainage warning method for a reclaimed water export pump house is also provided, based on any of the above-mentioned flood prevention and drainage systems for a reclaimed water export pump house, comprising:

When the liquid level in the water collection well is higher than the first liquid level height and the submersible sewage pump is not started, or when the liquid level in the water collection well is lower than the first liquid level height and the submersible sewage pump is started, a first-level alarm is issued to prompt the staff to check the equipment;

When the liquid level in the water collection well is higher than the second liquid level height and the submersible sewage pump is in operation, a secondary alarm will be issued to prompt the staff to activate the emergency plan to prevent flooding and drain water in time.

By adopting the above technical solution, the beneficial effects of the present invention are as follows:

1. The present invention uses a liquid level float switch and a submersible sewage pump to perform the first-level monitoring of the water level in the water collection well and automatically drain the water to maintain the normal operation of the pump room; through the cooperation of an ultrasonic level meter, a signal acquisition module and a host computer, and in combination with the status of the submersible sewage pump, the liquid level and drainage conditions in the pump room are monitored in the second level and automatic early warning is implemented to prevent flooding in the pump room, thereby effectively improving the safety of the operation of the reclaimed water export pump room.

2. The present invention also optimizes the design of the outlet pipe valve of the submersible sewage pump. An electric ball valve is added to the outlet pipe to prevent the problem of sewage backflow caused by failure of the check valve, thereby improving the drainage capacity of the pump room itself. At the same time, a maintenance valve and a bypass ball valve are provided to ensure the drainage capacity under special circumstances, reduce equipment losses caused by sudden failures, and further ensure the stable operation of the flood control and drainage system.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

FIG1 is a schematic diagram of the on-site arrangement of Embodiment 1 of the present invention;

FIG. 2 is a system structure block diagram of the first embodiment of the present invention.

Among them: 1. Water collection well; 2. Submersible sewage pump; 3. Liquid level float switch; 4. Ultrasonic liquid level meter; 5. Installation catheter; 6. PVC electric ball valve; 7. Check valve; 8. Inspection valve; 9. Bypass ball valve.

DETAILED DESCRIPTION

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by ordinary technicians in the technical field to which the present invention belongs. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

Embodiment 1

In a typical embodiment of the present application, a flood prevention and drainage system for a reclaimed water transmission pump house is provided, as shown in FIG1-2, including:

Water collection well 1, the water collection well is set in the pump room, used to store pump room leakage and sewage;

A submersible sewage pump 2 is arranged in the water collection well 1 and is used to discharge sewage in the well;

The liquid level float switch 3 is arranged in the water collection well 1 and connected to the submersible sewage pump 2, and is used to monitor the liquid level in the water collection well and control the automatic start and stop of the submersible sewage pump;

The ultrasonic level meter 4 is arranged above the water collection well 1 and is used to monitor the liquid level in the water collection well and transmit the liquid level signal;

The signal acquisition module is connected to the ultrasonic level meter and the submersible sewage pump to collect the liquid level signal of the ultrasonic level meter and the start and stop status of the submersible sewage pump, and upload it to the host computer in the central control room through the factory ring network;

The host computer is connected to the signal acquisition module and the alarm. Through the KingView software of the host computer, the real-time liquid level of the water collection well and the operating status of the submersible sewage pump can be displayed, and an audible and visual alarm will be issued when the water collection well exceeds the set liquid level or the submersible sewage pump starts abnormally.

Specifically, one or more water collection wells 1 are provided in the water collection well pump room, and one or more submersible sewage pumps can be provided in the water collection well to discharge sewage in the water collection well, and the submersible sewage pump 2 is located at the bottom of the water collection well. At the same time, a liquid level float switch 3 is also provided in the water collection well 1. The liquid level float switch adopts an existing product, and the liquid level float switch is connected in series to the control circuit of the submersible sewage pump. When the liquid level float switch detects that the liquid level changes to a set height, the submersible sewage pump is started.

Specifically, as shown in FIG1 , the ultrasonic level meter 4 is fixed above the water collection well 1, and the ultrasonic level meter 4 is installed in the water collection well through the installation conduit 5, which can ensure that the ultrasonic level meter can receive the effective echo of the liquid level in the water collection well, thereby ensuring the accuracy of the liquid level measurement. The ultrasonic level meter detects the liquid level in the water collection well in real time, transmits it to the signal acquisition module and displays it on the host computer, which is convenient for safety monitoring and timely warning of the pump room. In order to ensure accurate liquid level measurement, a through hole is opened on the top side wall of the installation conduit 5, which is connected to the atmosphere, so that the liquid level in the installation conduit is always level with the liquid level in the water collection well to avoid liquid level difference.

In addition, the flood prevention and drainage system of this embodiment also includes a PVC electric ball valve 6, which is arranged on the outlet pipe of the submersible sewage pump 2, and can supplement the function of the original check valve 7 to control the on and off of the drainage outlet. After the check valve has been used for a long time, when the check valve fails due to foreign matter obstruction or the like, sewage backflow due to the check valve can be prevented.

In this embodiment, the flood prevention and drainage measures of the first layer are implemented by the cooperation of the liquid level float switch and the control box. Specifically, the submersible sewage pump is externally connected with a control box set outside the water collection well. The control box can be selectively placed on the second floor in the factory to prevent the pump room from being affected by flooding. An AC contactor is arranged in the control box, and the coil of the AC contactor is connected in series with the contact of the liquid level float switch. When the liquid level detected by the liquid level float switch 3 reaches the first liquid level height, the contact of the liquid level float switch is closed, and the AC contactor is then energized, thereby controlling the submersible sewage pump to start drainage, preventing the pump room from being flooded and the equipment from being damaged due to excessive water accumulation in the pump room.

At the same time, in order to prevent sewage and external rainwater from flowing back through the outlet pipe, the control box is also connected to the PVC electric ball valve 6 to realize the linkage control of the PVC electric ball valve 6 and the submersible sewage pump 2. Specifically, the AC contactor is also provided with an auxiliary contact, which is connected in series in the control circuit of the PVC electric ball valve, so that the status of the PVC electric ball valve and the submersible sewage pump are controlled in linkage; when the submersible sewage pump is started, the PVC electric ball valve is opened at the same time, and the water can be discharged smoothly; when the submersible sewage pump is stopped, the PVC electric ball valve is closed, which can effectively prevent the backflow of sewage and rainwater due to the internal and external pressure difference and the failure of the check valve.

In addition, considering that after long-term use, the PVC electric ball valve may fail to cause pipeline leakage and backflow, or the PVC electric ball valve may affect the normal operation of the system during maintenance, in this embodiment, as shown in Figure 1, maintenance valves 8 are respectively provided at the front and rear ends of the PVC electric ball valve on the outlet pipeline for maintenance of the PVC electric ball valve 6. During operation, the maintenance valves 8 at both ends are closed first, and then the PVC electric ball valve is repaired. In addition, a bypass ball valve 9 connected in parallel with the PVC electric ball valve is also provided on the outlet pipeline of the submersible sewage pump for emergency manual operation when the electric ball valve fails.

In this embodiment, a manual start-stop button is also provided on the control box, which can manually control the start and stop of the submersible sewage pump. When the liquid level float switch fails to detect accurately or the control box fails, it plays an auxiliary control role and discharges sewage in time.

In this embodiment, the signal acquisition module adopts the existing products of Aimoxun, which can collect analog current signals and switch status signals. As shown in Figure 2, the signal acquisition module is respectively connected to the ultrasonic liquid level meter and the external control box of the submersible sewage pump to collect the liquid level signal of the ultrasonic liquid level meter and the start and stop status of the submersible sewage pump. The signal acquisition module is connected to the factory ring network switch through a network cable, and finally uploaded to the central control host computer through the MODBUS-TCP protocol. The control box of the ultrasonic liquid level meter and the submersible sewage pump is connected to the signal acquisition module through a shielded cable to prevent signal interference.

The specific working principle of this embodiment is as follows:

The water level in the water collection well is detected by a liquid level float switch and an ultrasonic level meter. The liquid level float switch is directly connected to the submersible sewage pump. When the liquid level in the well reaches the first liquid level height, the submersible pump starts and the PVC electric ball valve opens to drain water outward.

The detection value of the ultrasonic level meter and the switch signal of the submersible sewage pump are collected by the signal acquisition module and uploaded to the host computer. The host computer displays the collected data in real time for easy monitoring and analyzes the data at the same time. When the data is abnormal, the alarm is activated to remind the staff to deal with it in time to avoid flooding of the pump room.

Embodiment 2

In another typical embodiment of the present invention, an early warning method for a flood prevention and drainage system of a reclaimed water transmission pump house is also provided. Based on the flood prevention and drainage system of the pump house in Example 1, the specific steps include:

When the liquid level in the water collection well is higher than the first liquid level height and the submersible sewage pump is not started, or when the liquid level in the water collection well is lower than the first liquid level height and the submersible sewage pump is started, a first-level alarm is issued to prompt the staff to check the equipment in time;

When the liquid level in the water collection well is higher than the second liquid level height and the submersible sewage pump is in operation, a secondary alarm will be issued to prompt the staff to activate the emergency plan to prevent flooding and drain water in time.

Specifically, when the ultrasonic level meter detects that the liquid level in the sump exceeds the first liquid level height and has not reached the second liquid level height, and the submersible sewage pump has not started, or when the ultrasonic level meter detects that the liquid level in the sump is lower than the first liquid level height, and the submersible sewage pump has started, it means that there is an abnormality in the automatic control between the submersible sewage pump and the liquid level float switch, and the submersible sewage pump has not started normally. At this time, a first-level alarm is issued, and the staff needs to check the equipment to determine whether it is the liquid level float switch that is inaccurate, the control circuit is faulty, or other abnormal conditions, and perform timely maintenance to restore the system to normal.

When the ultrasonic level meter detects that the liquid level in the sump exceeds the second liquid level height, and the submersible sewage pump is in operation at this time, it means that the pump room is at risk of flooding and a second-level alarm is issued. The staff needs to immediately go to the site for investigation and confirmation, and initiate the emergency plan for drainage. Other auxiliary measures are used to quickly drain water and prevent flooding to ensure the safety of the equipment in the pump room.

Among them, when the submersible sewage pump is started, the electric PVC ball valve is opened at the same time to ensure smooth discharge of sewage; when the liquid level drops below the first liquid level height, the submersible sewage pump stops running and the electric PVC ball valve is closed to prevent sewage backflow.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a reclaimed water is defeated pump house flood prevention drainage system outward which characterized in that includes:

The water collecting well is arranged in the pump room and used for storing water leakage of the pump room;

The submersible sewage pump is arranged in the water collecting well and used for discharging sewage in the well;

The liquid level floating ball switch is arranged in the water collecting well, connected with the submersible sewage pump and used for monitoring the liquid level in the water collecting well;

The ultrasonic liquid level meter is arranged above the water collecting well and is used for detecting the liquid level of the water collecting well and transmitting a liquid level signal;

the signal acquisition module is connected with the ultrasonic liquid level meter and the submersible sewage pump, acquires analog quantity signals of the ultrasonic liquid level meter and switching value signals of the submersible sewage pump, and uploads the analog quantity signals and the switching value signals to the upper computer;

The upper computer is connected with the signal acquisition module and is connected with the alarm.

2. The system of claim 1, further comprising a PVC electric ball valve disposed on an outlet pipe of the submersible sewage pump.

3. The system for preventing flooding and draining water logging in a reclaimed water output pump house according to claim 2, wherein the submersible sewage pump is connected with a control box arranged outside a water collecting well, and the control box is respectively connected with the submersible sewage pump, a liquid level floating ball switch and a PVC electric ball valve.

4. The water out-conveying pump house flood-preventing and water-logging system as claimed in claim 3, wherein an alternating current contactor is arranged in the control box, and a coil of the alternating current contactor is connected with a contact of the liquid level floating ball switch in series.

5. The system for preventing flooding and draining water from a reclaimed water output pump house according to claim 4, wherein the alternating current contactor is provided with an auxiliary contact, and the auxiliary contact is connected in series in a control loop of the PVC electric ball valve for controlling the PVC electric ball valve and the submersible sewage pump in a linkage way.

6. The system for preventing flooding and draining water from a reclaimed water output pump house as claimed in claim 2, wherein the front end and the rear end of the PVC electric ball valve on the outlet pipeline are respectively provided with a maintenance valve.

7. The system for flooding prevention and drainage of a reclaimed water output pump house as claimed in claim 2, wherein a bypass ball valve connected with the electric ball valve in parallel is further arranged on the outlet pipeline.

8. The system for preventing flooding and draining water from a reclaimed water output pump house as claimed in claim 1, wherein the ultrasonic level gauge is connected with the water collecting well through a mounting conduit.

9. The system for preventing flooding and draining water from a reclaimed water output pump house as claimed in claim 1, wherein the side wall of the top of the installation conduit is provided with a through hole.

10. An early warning method of a flooding prevention and drainage system of an reclaimed water output pump house, based on the flooding prevention and drainage system of the reclaimed water output pump house as claimed in any one of claims 1 to 9, comprising the following steps:

When the liquid level in the water collecting well is higher than the first liquid level, the submersible sewage pump is not started or the liquid level in the water collecting well is lower than the first liquid level, and the submersible sewage pump is started, a primary alarm is given to prompt a worker to check equipment;

when the liquid level in the water collecting well is higher than the second liquid level, and the submersible sewage pump is in an operating state, secondary alarm is carried out, and a worker is prompted to start an emergency plan, so that flooding prevention and drainage are timely carried out.