Control system for clean water sand sucker

Abstract

The control system for the clean water sand suction machine comprises limit switches installed at the front end and the rear end of the sand suction machine, the limit switches and the sand suction machine are respectively connected with a DCS controller, the DCS controller is further connected with a timing module, an input module, a starting module and a sand suction pump, instructions are input through the input module, the starting module is controlled to start the sand suction pump, and the sand suction pump is controlled to start the sand suction pump. And the operation time of the sand suction pump is controlled through the timing module. When clean water needs to be desanded in the process, the DCS controller automatically starts the sand suction pump, the double-groove sand suction machine automatically starts to rotate forwards after the sand suction pump operates, the double-groove sand suction machine stops rotating forwards after moving to the front end and touching a limiting switch, and then the double-groove sand suction machine automatically starts to rotate backwards. By means of the automatic sand discharging device, frequent operation and misoperation of technicians are reduced, time and labor are saved, and normal operation of a clear water workshop section is guaranteed.

Description

Technical Field

[0001] The utility model relates to a clean water sand suction machine, in particular to a control system for the clean water sand suction machine. Background Art

[0002] The sand suction machine in the water cleaning section of the thermal power workshop is an important part of the water pretreatment for the entire plant. Its main purpose is to regularly remove sand from the clean water, especially during floods. The water taken up from the river is particularly sandy. If sand removal is not carried out, it will bring serious safety hazards to production.

[0003] The existing design is to install an on-site control box next to the sand settling tank. When sand removal is required, the process operator has to go to the site and manually start the sand suction pump and sand suction machine to remove the sand. The whole process lasts about an hour, which is time-consuming and labor-intensive, and prone to misoperation. In addition, there is only one operator on duty. When performing sand removal operations on site, other equipment in the section cannot be monitored, which poses a great safety hazard to the normal operation of the clean water section. Utility Model Content

[0004] The purpose of the utility model is to provide a control system for a clean water sand suction machine, which reduces the frequent operation of the sand suction machine and the sand suction pump by process personnel, and also reduces the risk of misoperation by process personnel, thus saving time and effort and ensuring the normal operation of the clean water section.

[0005] The technical solution adopted by the utility model is a control system for a clean water sand suction machine, which includes limit switches installed at the front end and the rear end of the sand suction machine. The limit switches and the sand suction machine are respectively connected to a DCS controller. The DCS controller is also connected to a timing module, an input module, a starting module and a sand suction pump. Instructions are input through the input module to control the starting module to start the sand suction pump, and the running time of the sand suction pump is controlled through the timing module.

[0006] Preferably, it also includes:

[0007] Display module, used to display the operating status of the equipment;

[0008] Reset the module to directly restore the initial state;

[0009] The standing time setting module is used to set the standing time of the sand suction machine.

[0010] Preferably, the sand suction machine adopts E72101A double-slot sand suction machine.

[0011] When the sand suction machine stops working, the DCS controller will start the sand suction pump automatically, and the sand suction pump will start working for 5 minutes. When the sand suction pump runs for 5 minutes, the double-trough sand suction machine will automatically start forward rotation. When the double-trough sand suction machine moves to the front end and touches the front end limit switch on site, it will stop forward rotation. After waiting for 5 minutes, the double-trough sand suction machine will automatically start reverse rotation until it moves to the rear end and touches the rear end limit switch on site, and then it will stop reverse rotation and stop the sand suction pump at the same time, completing an automatic sand discharge. The DCS controller will time the sand suction pump static time set by the process personnel. After the timer ends, the automatic control program will automatically perform the next sand discharge. The entire control process does not require manual intervention by the operator. It only needs to monitor the operating status of the sand suction machine on the running screen, which reduces the frequent operation and misoperation of the process personnel, saves time and effort, and ensures the normal operation of the clean water section. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is the structural block diagram of the control system of the clean water sand suction machine;

[0013] Figure 2 This is the control circuit diagram;

[0014] Figure 3 This is the working flow chart of the clean water sand suction machine control system. DETAILED DESCRIPTION

[0015] like Figure 1-3 As shown, the control system for the clean water sand suction machine includes a DCS controller 1, a sand suction pump 2, a limit switch 3, a sand suction machine 4, a display module 5, an input module 6, a start module 7, a reset module 8, a static time setting module 9 and a timing module 10.

[0016] The sand suction machine 4 uses an E72101A dual-slot sand suction machine. Two limit switches 3 are installed, one at the front and one at the rear of the sand suction machine 4. The limit switches 3 and the sand suction machine 4 are electrically connected to a DCS controller 1. The DCS controller 1 is also electrically connected to the sand suction pump 2, a display module 5, an input module 6, a start module 7, a reset module 8, a rest time setting module 9, and a timing module 10. Input commands from the input module 6 control the start module 7 to activate the sand suction pump 2, while the timing module 5 controls the operating time of the sand suction pump 2. The display module 5 displays the operating status of the device; the reset module 8 directly restores the device to its initial state; and the rest time setting module 9 sets the rest time of the sand suction machine 4.

[0017] During operation, the timing module 10 and the rest time setting module 9 are first set as needed to limit the operating time of the sand suction pump 2 and the rest time of the sand suction machine 4. In this embodiment, the sand suction pump 2 runs for 5 minutes, and the sand suction machine 4 rests for 5 minutes. The DCS controller 1 then sends a command to the start module 7 to start the sand suction pump 2. After the sand suction pump 2 runs for 5 minutes, the sand suction machine 4 automatically starts rotating forward. When the sand suction machine 4 moves to the front end and hits the front limit switch 3 on site, it stops rotating forward. After waiting for 5 minutes, the sand suction machine 4 automatically starts rotating backward. It stops rotating backward and stops the sand suction pump 2 at the same time when it moves to the rear end and hits the rear limit switch 3 on site, completing one automatic sand discharge. The DCS controller counts the time according to the rest time set by the process operator. After the count ends, the automatic control program automatically proceeds to the next sand discharge. The entire control process requires no manual intervention by the operator; the operator only needs to monitor the operating status of the sand suction machine on the operation screen. This reduces frequent operations and misoperations by the process operator, saving both time and effort, and ensuring the normal operation of the water purification section.

[0018] The above-described embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Any modifications and improvements made by those skilled in the art to the technical solution of the present invention without departing from the spirit and principles of the present invention shall fall within the scope of protection defined by the claims of the present invention.

Claims

1. A control system for a clean water sand suction machine, characterized in that: The invention comprises limit switches (3) installed at the front and rear ends of a sand suction machine (4), the limit switches (3) and the sand suction machine (4) are respectively connected to a DCS controller (1), and the DCS controller (1) is further connected to a timing module (10), an input module (6), a starting module (7) and a sand suction pump (2). The input module (6) inputs an instruction to control the starting module (7) to start the sand suction pump (2), and the timing module (10) controls the running time of the sand suction pump (2).

2. The control system for the clean water sand suction machine according to claim 1, characterized in that: It also includes: Display module (5), used to display the operating status of the device; Reset module (8) directly restores the initial state; The standing time setting module (9) is used to set the standing time of the sand suction machine.

3. The control system for the clean water sand suction machine according to claim 1, characterized in that: The sand suction machine (4) adopts an E72101A double-slot sand suction machine.

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