阅读说明：本技术 一种水厂滤池控制系统 (Water plant filter control system ) 是由 杨徐春 李松 江治伟 华志勇 闵嘉涛 关好然 于 2021-09-08 设计创作，主要内容包括：本发明涉及控制设备技术领域,特别涉及一种水厂滤池控制系统。包括上位机,所述上位机通过LAN与PLC控制器连接,并实现数据交互,所述PLC控制器通过接线端子与滤池控制阀组连接,所述PLC控制器通过LAN与鼓风机房控制器连接,并实现数据交互。本发明通过利用PLC控制器搭建上位机、滤池控制阀组以及鼓风机房控制器之间的控制子站,通过上位机一、上位机二和LAN将其组成通信组网,再与反冲水泵、反冲气源等构建成一个更大的通信环路,再与鼓风机控制器的数据进行汇接,最后通过LAN将现场数据传输到水厂中设有的上位机,上位机将数据传输给大显示屏,实现实时数据信息的大屏显示。(The invention relates to the technical field of control equipment, in particular to a filter pool control system of a water plant. The air-blower room control system is characterized by comprising an upper computer, wherein the upper computer is connected with a PLC (programmable logic controller) through an LAN (local area network) and realizes data interaction, the PLC is connected with a filter chamber control valve group through a wiring terminal, and the PLC is connected with an air-blower room controller through the LAN and realizes data interaction. According to the invention, a PLC (programmable logic controller) is utilized to build a control substation among an upper computer, a filter control valve group and an air blower room controller, the PLC, the upper computer I, the upper computer II and an LAN (local area network) are used for forming a communication network, then the communication network is combined with a back flushing water pump, a back flushing air source and the like to form a larger communication loop, then the communication network is in tandem connection with data of the air blower controller, finally, field data are transmitted to the upper computer arranged in a water plant through the LAN, and the data are transmitted to a large display screen by the upper computer, so that large-screen display of real-time data information is realized.)

1. A water plant filter control system is characterized in that: including host computer (1), host computer (1) is connected with PLC controller (2) through LAN to realize the data interaction, PLC controller (2) are connected with filtering pond valve unit (4) through binding post (3), PLC controller (2) are connected with air-blower room controller (5) through LAN to realize the data interaction.

2. A water plant filter control system according to claim 1, wherein: the upper computer (1) is connected with a large display screen (6) for displaying real-time data information on a large screen.

3. A water plant filter control system according to claim 1, wherein: and a first switch (7) for forwarding an electric signal between the upper computer (1) and the PLC (2) is arranged between the upper computer (1) and the PLC (2).

4. A water plant filter control system according to claim 1, wherein: and a relay (8) used for realizing the switching circuit and automatic control of the upper computer (1) and the PLC controller (2) is arranged between the PLC controller (2) and the first switch (7).

5. A water plant filter control system according to claim 1, wherein: and a fuse (9) for protecting the short circuit and the overcurrent of the circuit is arranged between the PLC (2) and the wiring terminal (3).

6. A water plant filter control system according to claim 1, wherein: the filter control valve (4) group comprises a water inlet valve (41), a water discharge valve (42), a back flushing valve (43), a back flushing valve (44) and a post-filter valve (45).

7. A water plant filter control system according to claim 1, wherein: and a second switch (10) for forwarding the electric signal between the PLC (2) and the blower room controller (5) is arranged between the PLC (2) and the blower room controller (5).

8. A water plant filter control system according to claim 1, wherein: and the blower room controller (5) is connected with the blower (11).

9. A water plant filter control system according to claim 6, wherein: the backflushing water valve (43) is connected with a backflushing water pump (431), and the backflushing air valve (44) is connected with a backflushing air source (441).

Technical Field

The invention relates to the technical field of control equipment, in particular to a filter pool control system of a water plant.

Background

The filter is an extremely important component in the production link of a water plant, the filtering effect of the filter seriously affects the water quality index of delivery, and the sand washing of the filter is the important factor in the filter process. The sand washing system of the filter tank generally comprises a plurality of processes such as air flushing, water flushing, air-water mixed flushing, sewage recovery, pneumatic valve driving and the like.

The sand washing of the filter tank of the existing water plant is still carried out in a manual mode, and the mode has the following problems: 1. the efficiency is low, the sand washing of the filter tank is a closed loop system, different equipment needs to be put into each link according to a certain time sequence, the corresponding equipment start and stop control is needed, in a manual mode, people need to be arranged in each link for watching, and as the equipment of each link is far away, the traditional method is that the equipment of each link is put into operation and connected in a telephone mode, so that the sand washing efficiency is greatly reduced

2. The hysteresis of sand washing accident handling, in the manual sand washing mode, if a certain device has a problem, the sand washing process needs to be interrupted, and due to the hysteresis of the communication mode, the handling of the failure cannot be responded in time, which leads to other unpredictable events.

3. The sand washing is not thorough, and in a manual mode, the sand washing of the filter tank is not thorough due to the fact that the responsibility of some people in transit is not strong, and therefore the water quality and the water supply amount are reduced.

4. The high-efficiency filtration of the filter tank cannot be guaranteed, the standard state of the filter tank is the constant water level filtration, and the manual mode cannot be realized, because the process is a dynamic and continuous adjusting process, the filter tank filtration is finally caused to be in a low-efficiency state, the optimal filtration effect cannot be obtained, and the energy consumption of equipment is increased due to frequent sand washing.

In view of the above problems, it is urgently needed to develop a control system for controlling a filter tank of a water plant.

Disclosure of Invention

The technical problem to be solved by the present invention is to provide a control system for controlling a filter tank of a water plant, so as to solve the problems existing in the background art.

In order to solve the technical problems, the technical scheme of the invention is as follows: the utility model provides a water plant filtering pond control system, includes the host computer, the host computer passes through LAN and is connected with the PLC controller to realize the data interaction, the PLC controller passes through binding post and is connected with filtering pond valve unit, the PLC controller passes through LAN and is connected with air-blower room controller, and realizes the data interaction.

And the upper computer is connected with a large display screen for displaying real-time data information on the large screen.

And a first switch for forwarding an electric signal between the upper computer and the PLC is arranged between the upper computer and the PLC.

And a relay for realizing circuit conversion and automatic control of the upper computer through the relay and the PLC is arranged between the PLC and the first switch.

And a fuse used for protecting short circuit and overcurrent of the circuit is arranged between the PLC and the wiring terminal.

The filter pool control valve group comprises a water inlet valve, a water discharge valve, a back flushing valve and a post-filter valve.

And a second switch for forwarding an electric signal between the PLC and the blower room controller is arranged between the PLC and the blower room controller.

And the blower room controller is connected with the blower.

The backflushing water valve is connected with the backflushing water pump, and the backflushing air valve is connected with the backflushing air source.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, a PLC (programmable logic controller) is utilized to build a control substation among an upper computer, a filter control valve group and an air blower room controller, the PLC, the upper computer I, the upper computer II and an LAN (local area network) are used for forming a communication network, then the communication network is combined with a back flushing water pump, a back flushing air source and the like to form a larger communication loop, then the communication network is in tandem connection with data of the air blower controller, finally, field data are transmitted to the upper computer arranged in a water plant through the LAN, and the data are transmitted to a large display screen by the upper computer, so that large-screen display of real-time data information is realized.

Drawings

Fig. 1 is a schematic diagram of the structure of the present invention.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Referring to fig. 1, the water plant filter control system of the invention comprises an upper computer 1, wherein the upper computer 1 is connected with a PLC (programmable logic controller) 2 through an LAN (local area network) and realizes data interaction, the PLC 2 is connected with a filter control valve group 4 through a wiring terminal 3, and the PLC 2 is connected with a blower room controller 5 through the LAN and realizes data interaction. The PLC controller 2 is a Siemens PLC controller, and after the PLC controller 2 is put into operation, the working process is generally divided into three stages, namely three stages of input sampling, user program execution and output refreshing. The completion of the above three phases is referred to as one scanning cycle. The CPU of the PLC controller 2 repeatedly executes the above three stages at a certain scanning speed during the entire operation. Folding input sampling in the input sampling phase, the PLC controller 2 reads in all input states and data in sequence in a scanning manner and stores them in the corresponding cells in the I/O map area. And after the input sampling is finished, switching to a user program execution and output refreshing stage. In both phases, the state and data of the corresponding cells in the I/O map region do not change even if the input state and data change. Thus, if the input is a pulse signal, the width of the pulse signal must be greater than one scan period to ensure that the input can be read in under any circumstances. Folding user program execution in the user program execution phase, the PLC always scans the user programs (ladder) sequentially in the top-down order. When each ladder diagram is scanned, the control circuit formed by the contacts on the left side of the ladder diagram is always scanned first, the control circuit formed by the contacts is subjected to logic operation according to the sequence of first left, second right, first up, second down, and then the state of the corresponding bit of the logic coil in the system RAM storage area is refreshed according to the result of the logic operation; or refreshing the state of the corresponding bit of the output coil in the I/O mapping area; or whether to execute a special function instruction specified by the ladder diagram. That is, during the execution of the user program, only the states and data of the input points in the I/O mapping area will not change, while the states and data of other output points and soft devices in the I/O mapping area or the system RAM storage area may change, and the program execution result of the ladder diagram arranged above will act on the ladder diagram arranged below using these coils or data; in contrast, the ladder diagram arranged below, whose refreshed logic coil states or data can only be effected by the next scanning cycle for the program arranged above.

Folding output refreshing, when the scanning user program is finished, the PLC 2 enters an output refreshing stage. During this period, the CPU refreshes all the output latch circuits according to the corresponding states and data in the I/O mapping area, and then drives the corresponding peripheral devices through the output circuits. At this time, it is the true output of the PLC controller 2.

A LAN is a computer communication network, abbreviated as LAN, that connects various computers, external devices, databases, etc. to each other within a local geographical area (e.g., within a school, factory, or institution). It can be connected with remote local area network, data base or processing centre by means of data communication network or special-purpose data circuit to form a large-range information processing system.

The upper computer 1 is a computer which can directly send out an operation command, and is used for sending a corresponding operation command to the PLC controller 2, and then the PLC controller 2 executes a corresponding command, such as controlling the opening/closing of a water inlet valve, a water discharge valve, a back flushing valve and a filtered valve in the filter control valve bank.

In the invention, the upper computer 1 is connected with a large display screen 6 for displaying real-time data information on a large screen. And a first switch 7 for forwarding an electric signal between the upper computer 1 and the PLC controller 2 is arranged between the upper computer 1 and the PLC controller 2.

And a relay 8 for realizing the circuit switching and automatic control of the upper computer 1 and the PLC controller 2 is arranged between the PLC controller 2 and the first switch 7. The relay 8 has a control system (also called an input loop) and a controlled system (also called an output loop), and is actually an automatic switch for controlling a larger current with a smaller current. The functions of automatic regulation, safety protection, circuit conversion and the like are achieved.

In order to prevent the electric elements from being damaged when the circuit is too large or short-circuited, a fuse 9 for protecting the short circuit and the overcurrent is arranged between the PLC controller 2 and the wiring terminal 3.

In order to control the operation state of each filter tank in the filter tank, the filter tank control valve 4 group comprises a water inlet valve 41, a water discharge valve 42, a back flushing water valve 43, a back flushing air valve 44 and a post-filter valve 45. And a second switch 10 for forwarding the electric signals between the PLC 2 and the blower room controller 5 is arranged between the PLC 2 and the blower room controller 5. And the blower room controller 5 is connected with a blower 11. The backwash water valve 43 is connected to a backwash water pump 431, and the backwash air valve 44 is connected to a backwash air source 441.

In the present invention, a malfunction alarm device may be provided, which is connected to the PLC controller 2, for malfunction alarm.

The LAN adopted by the invention is an optical fiber network to carry out data communication among control stations, can control the filter pool control valve group, can configure sand washing time, independently configure air flushing, water flushing and air-water mixed flushing time according to process requirements, and control the efficient operation of the filter pool. In order to reduce the impact on the power grid when the equipment is started, the equipment runs at full speed after running stably at low speed, the impact of the equipment is reduced, and a soft pneumatic cabinet can be added to power equipment such as a blower and a backwashing water pump, for example, if the blower soft start cabinet is connected with the blower 11, and the water pump soft start cabinet is connected with the backwashing water pump 431.

Specifically, the PLC is utilized to build a control substation among the upper computer, the filter control valve group and the blower room controller, the upper computer I, the upper computer II and the LAN form a communication network, the communication network is further combined with a back flushing water pump, a back flushing air source and the like to form a larger communication loop, the communication loop is further connected with data of the blower controller in a tandem mode, finally, the on-site data are transmitted to the upper computer arranged in a water plant through the LAN, and the data are transmitted to a large display screen by the upper computer, so that large-screen display of real-time data information is realized.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.