Modular water plant drive unit

Abstract

The present invention discloses a modular water plant drive unit, which relates to the technical field of water plant control equipment, and includes a bus base plate, wherein the bus base plate is electrically connected to a control module, a switch valve plate and an output plate, wherein the switch valve plate is electrically connected to the output plate; and the output plate is electrically connected to a load. The modular water plant drive unit of the present invention solves the technical problems of the prior art such as the complex structure of the water plant control cabinet, the long production cycle, the high cost, and the difficulty in modification and maintenance. The modular water plant drive unit of the present invention has a simple structure, is convenient and quick to assemble and inspect, has a high pass rate, has a low failure rate in use, is easy to maintain, is simple to modify and expand, and has a low cost.

Description

Technical Field

[0001] The invention relates to the technical field of water plant control equipment, and in particular to a modular water plant drive unit. Background Art

[0002] In a water plant, there are many valves, water pumps and other equipment. Currently, these equipment are electrically controlled by control panels or control cabinets. The control panels or control cabinets are assembled with standard industrial electrical components (such as contactors, relays, etc.) and completed through manual wiring, which has a long assembly cycle. This kind of control panel or control cabinet usually has many nodes and complex lines. It is easy to have wiring errors or loose crimping during the assembly process, which makes quality inspection difficult and wastes a lot of time. It is easy to malfunction during use and is difficult to repair, requiring highly technical professionals to complete. At the same time, if this kind of control panel or control cabinet needs to be modified or expanded after assembly, professionals need to modify the design and re-lay out the panel and wiring, which requires a lot of manpower and material resources. Summary of the invention

[0003] In view of the above defects, the purpose of the present invention is to provide a modular water plant drive unit, which has a simple structure, convenient and quick assembly and quality inspection, and a high pass rate; low failure rate in use and easy maintenance; simple modification and expansion; and low cost.

[0004] In order to achieve the above object, the technical solution of the present invention is:

[0005] A modular water plant drive unit comprises a bus base plate, the bus base plate is electrically connected to a control module, a switch valve plate and an output plate, the switch valve plate is electrically connected to the output plate; the output plate is electrically connected to a load.

[0006] The bus base plate is also electrically connected to an operation board, and the operation board is electrically connected to an operation panel.

[0007] Wherein, the bus bottom plate is provided with a switch valve plate slot, an output plate slot and an operation plate slot, and the switch valve plate, the output plate and the operation plate are respectively plugged into the corresponding slots.

[0008] Wherein, the switch valve plate input end receives the valve opening position signal, the valve closing position signal, the valve opening instruction and the valve closing instruction; the valve opening instruction is electrically connected to the long closed contact of the opening position relay J1 and then electrically connected to the coil of the valve opening state relay J4, one long open contact of the valve opening state relay J4 is electrically connected to the valve opening indication signal output end, another long open contact of the valve opening state relay J4 is electrically connected to the coil of the valve opening control relay J6, and the long open contact of the valve opening control relay J6 is electrically connected to the valve opening command output end; the valve opening position signal is electrically connected to the coil of the opening position relay J1; the valve closing instruction is electrically connected to the long closed contact of the closing position relay J3 and then electrically connected to the coil of the valve closing state relay J2, one long open contact of the valve closing state relay J2 is electrically connected to the valve closing indication signal output end, another long open contact of the valve closing state relay J2 is electrically connected to the coil of the valve closing control relay J5, and the long open contact of the valve closing control relay J5 is electrically connected to the valve closing command output end; the valve closing position signal is electrically connected to the coil of the closing position relay J3.

[0009] After adopting the above technical solution, the beneficial effects of the present invention are:

[0010] Since the modular water plant drive unit of the present invention includes a bus base plate, the bus base plate is electrically connected to the control module, the switch valve plate and the output plate, the switch valve plate is electrically connected to the output plate; the output plate is electrically connected to the load. The present invention uses PCB (Printed Circuit Board) to replace the electrical components in the prior art, changes the original production method, and completely solves various technical problems existing in the current water plant control unit, and has the following advantages:

[0011] 1. Once the PCB board is designed, it can be mass-produced by the machine, and there is no need for manual wiring, so there will be no wrong wiring or loose wire pressing. The product quality is consistent, the pass rate is high, and the quality inspection is convenient and fast;

[0012] Second, the original control cabinet assembly took about 10 days, while the present invention assembly takes no more than 2 days, greatly shortening the assembly cycle;

[0013] 3. The original electrical components were replaced with electronic components, which greatly reduced the cost by more than 30% compared with the original control unit;

[0014] Fourth, the present invention only requires ordinary electricians to carry out maintenance, and no longer requires highly skilled professional technicians to carry out maintenance, and maintenance is simple and convenient;

[0015] 5. If the control unit of the present invention needs to be modified or expanded, it only needs to replace the corresponding plug-in board on the bottom plate, and no redesign or re-layout of the plate is required. It is simple and easy to operate, has high interchangeability and strong versatility.

[0016] To sum up, the modular water plant drive unit of the present invention solves the technical problems in the prior art such as the complex structure of the water plant control cabinet, the long production cycle, the high cost, and the difficulty in modification and maintenance. The modular water plant drive unit of the present invention has a simple structure, and is convenient and quick to assemble and inspect, with a high pass rate; the failure rate in use is low, and maintenance is easy; modification and expansion are simple; and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural block diagram of the modular water plant drive unit of the present invention;

[0018] Figure 2 yes Figure 1 The structural diagram of the bus bottom plate;

[0019] Figure 3 yes Figure 1 Circuit diagram of the middle switch valve plate;

[0020] Figure 4 yes Figure 1 Schematic diagram of the control circuit of the middle operation panel;

[0021] Figure 5 yes Figure 1 Schematic diagram of the display circuit of the middle operation panel;

[0022] Figure 6 It is a structural schematic diagram of the back plate of the modular water plant drive unit of the present invention;

[0023] In the figure: 20, control module, 22, output board slot, 24, operation board slot, 26, switch valve plate slot, 40, switch valve interface, 42, power input interface, 44, bus communication interface, 70, bus base plate. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0025] The directions mentioned in this specification are based on the directions shown in the drawings and only represent relative positions, not absolute positions.

[0026] like Figure 1As shown, a modular water plant drive unit includes a bus base plate, a control module, a switch valve plate, an output plate, an operation plate and a power module. The power module is electrically connected to the bus base plate and the control module. The bus base plate is electrically connected to the control module, the operation plate, the switch valve plate and the output plate. The switch valve plate is electrically connected to the output plate. The operation plate is electrically connected to the operation panel (not shown in the figure). The output plate is electrically connected to the back plate (not shown in the figure), and the back plate is provided with an interface for connecting the load, and the output plate is electrically connected to the load through the back plate. The control unit includes a box-type housing (not shown in the figure), and the bus base plate, the control module, the switch valve plate, the output plate, the operation plate and the power module are all installed in the housing, the front side wall of the housing is the operation panel, and the rear side wall of the housing is the back plate.

[0027] like Figure 2 As shown, the bus bottom plate 70 is provided with a switch valve plate slot 26, an output plate slot 22 and an operation plate slot 24. The switch valve plate is plugged into the switch valve plate slot 26, the output plate is plugged into the output plate slot 22, and the operation plate is plugged into the operation plate slot 24. The control module 20 is fixed on the bus bottom plate 70.

[0028] like Figure 2 and Figure 6 As shown together, the back panel is provided with a power input interface 42, a bus communication interface 44, and a switch valve interface 40. The power input interface 42 is used to electrically connect to the mains, and the power input interface 42 is internally electrically connected to the power module. The bus communication interface 44 is internally connected to the control module 20, and the bus communication interface 44 can be externally connected to the control unit or the extended drive unit for communication. The switch valve interface 20 is used to electrically connect to the switch valve load.

[0029] like Figure 3 As shown, each switch valve plate can integrate control circuits of multiple switch valves. The following is a detailed description of the control circuit of only one switch valve as an example:

[0030] It includes an open position relay J1, a valve closing state relay J2, a closed position relay J3, a valve opening state relay J4, a valve closing control relay J5, a valve opening control relay J6, an input terminal CON1, and output terminals CON2 and CON3. The input terminal CON1 is provided with six input terminals, all of which are electrically connected to the bus backplane. Terminal 1 receives the open position feedback signal of the switch valve, terminal 2 receives the closed position feedback signal of the switch valve, terminal 3 receives the valve opening command signal issued by the control module or the operation panel, terminal 4 receives the valve closing command signal issued by the control module or the operation panel, and terminals 5 and 6 are electrically connected to 24V and 0V power supplies respectively. The output terminal CON2 is provided with three output terminals, all of which are electrically connected to the bus backplane. Terminal 1 outputs the valve closing indication signal to the control module and the operation panel, terminal 2 outputs the valve opening indication signal to the control module and the operation panel, and terminal 3 is electrically connected to the 0V power supply. The output terminal CON3 is provided with three output terminals, all of which are electrically connected to the bus backplane. Terminal 1 outputs the valve opening command signal to the output panel, terminal 2 outputs the valve closing command signal to the output panel, and terminal 3 is electrically connected to the power supply N.

[0031] The valve opening command (terminal 3 of input terminal CON1) is electrically connected to the long-closed contact of the valve opening relay J1 and then electrically connected to the coil of the valve opening state relay J4. One long-open contact of the valve opening state relay J4 is electrically connected to the valve opening indication signal output terminal (terminal 2 of output terminal CON2). Another long-open contact of the valve opening state relay J4 is electrically connected to the coil of the valve opening control relay J6. The long-open contact of the valve opening control relay J6 is electrically connected to the valve opening command output terminal (terminal 1 of output terminal CON3). The valve opening signal (terminal 1 of input terminal CON1) is electrically connected to the coil of the valve opening relay J1.

[0032] The valve closing command (terminal 4 of input terminal CON1) is electrically connected to the long-closed contact of the fully closed relay J3 and then electrically connected to the coil of the valve closing state relay J2. A long-open contact of the valve closing state relay J2 is electrically connected to the valve closing indication signal output terminal (terminal 1 of output terminal CON2). Another long-open contact of the valve closing state relay J2 is electrically connected to the coil of the valve closing control relay J5. The long-open contact of the valve closing control relay J5 is electrically connected to the valve closing command output terminal (terminal 2 of output terminal CON3). The valve fully closed signal (terminal 2 of input terminal CON1) is electrically connected to the coil of the fully closed relay J3.

[0033] like Figure 3 As shown, the working principle of the switch valve plate is as follows:

[0034] Open valve: After receiving the valve opening command, the coil of the valve opening state relay J4 is energized, its long open contact is closed, and the valve opening indication signal is output as the valve opening state indication. At the same time, the coil of the valve opening control relay J6 is energized, the long open contact of the valve opening control relay J6 is closed, and the valve opening command signal is output, and the valve is opened. After the valve is fully opened, an open position signal will be fed back. After receiving the open position signal, the coil of the open position relay J1 is energized, the long closed contact of the open position relay J1 is disconnected, the coil of the valve opening state relay J4 is de-energized, the long open contact of the valve opening state relay J4 is disconnected, the coil of the valve opening control relay J6 is de-energized, the long open contact of the valve opening control relay J6 is disconnected, and the valve opening command is released.

[0035] Valve closing: After receiving the valve closing command, the valve closing state relay J2 coil is energized, its long open contact is closed, and the valve closing indication signal is output as the valve closing state indication. At the same time, the valve closing control relay J5 coil is energized, the long contact of the valve closing control relay J5 is closed, and the valve closing command signal is output, and the valve is closed. After the valve is fully closed, a fully closed signal will be fed back. After receiving the fully closed signal, the fully closed relay J3 coil is energized, the long closed contact of the fully closed relay J3 is disconnected, the valve closing state relay J2 coil is de-energized, the long open contact of the valve closing state relay J2 is disconnected, the valve closing control relay J5 coil is de-energized, the long open contact of the valve closing control relay J5 is disconnected, and the valve closing command is released.

[0036] like Figure 1 As shown, the output board is used to electrically connect the bus base plate and the switch valve plate with various interfaces on the equipment backplane, playing the role of signal transfer.

[0037] like Figure 4 and Figure 5 As shown in the figure, the operation board is electrically connected to the operation panel for manual control and indication. The operation panel is provided with operation switches (or buttons) and indicator lights for each switch valve and direct start load. The operation board includes a CPU chip. The preferred CPU chip model in this embodiment is STC8F2K32S2. Each input pin of the CPU chip is electrically connected to each operation switch on the operation panel, and each output pin of the CPU chip is electrically connected to the bus bottom plate, which is electrically connected to the switch valve plate and the direct start control plate through the bus bottom plate, and is used to manually control the start and stop of each switch valve and direct start load. The indication circuit is used to display the open and close status of each switch valve, and is electrically connected to the switch valve plate through the bus bottom plate.

[0038] The modular water plant drive unit of the present invention can be automatically controlled or manually operated. The automatic control is performed through the control module, and the manual control is performed through the operation panel, and the operation is simple and convenient.

[0039] The preferred control module in this embodiment is a programmable logic controller (PLC). PLC is the preferred solution of this embodiment. In actual application, it is not limited to PLC, and microcomputer chips such as single-chip microcomputers can also be used.

[0040] The modular water plant drive unit of the present invention adopts PCB (Printed Circuit Board) to replace the electrical components in the prior art, has a simple structure, is convenient and quick to assemble and inspect, has a high pass rate, has a low failure rate in use, is easy to maintain, is simple to modify and expand, and has a low cost.

[0041] The present invention is not limited to the above-mentioned specific implementation modes. Various changes made by ordinary technicians in this field based on the above-mentioned concepts without creative work are all within the protection scope of the present invention.

Claims

1. Modular water plant drive unit, characterized in that, The bus base plate includes a control module, a switch valve plate and an output plate electrically connected to the bus base plate, the switch valve plate is electrically connected to the output plate; the output plate is electrically connected to the load, the bus base plate is also electrically connected to the operation board, the operation board is electrically connected to the operation panel, the bus base plate is provided with a switch valve plate slot, an output plate slot and an operation board slot, the switch valve plate, the output plate and the operation board are respectively plugged into the corresponding slots, the switch valve plate input end receives a valve open position signal, a valve close position signal, a valve open command and a valve close command; the valve open command is electrically connected to the long closed contact of the open position relay J1 and then electrically connected to the coil of the valve open state relay J4, a long open contact of the valve open state relay J4 is electrically connected to the valve open indication signal input The output terminal, another long open contact of the valve opening state relay J4 is electrically connected to the coil of the valve opening control relay J6, and the long open contact of the valve opening control relay J6 is electrically connected to the valve opening command output terminal; the valve opening position signal is electrically connected to the coil of the opening position relay J1; the valve closing instruction is electrically connected to the long closed contact of the closing position relay J3 and then electrically connected to the coil of the valve closing state relay J2, a long open contact of the valve closing state relay J2 is electrically connected to the valve closing indication signal output terminal, and another long open contact of the valve closing state relay J2 is electrically connected to the coil of the valve closing control relay J5, and the long open contact of the valve closing control relay J5 is electrically connected to the valve closing command output terminal; the valve closing position signal is electrically connected to the coil of the closing position relay J3.

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