CN106814686B - Intelligent backwashing control device - Google Patents
Intelligent backwashing control device Download PDFInfo
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- CN106814686B CN106814686B CN201710160276.XA CN201710160276A CN106814686B CN 106814686 B CN106814686 B CN 106814686B CN 201710160276 A CN201710160276 A CN 201710160276A CN 106814686 B CN106814686 B CN 106814686B
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- valve
- power supply
- indicator lamp
- direct current
- current power
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- 238000011001 backwashing Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 139
- 238000005086 pumping Methods 0.000 claims abstract description 13
- 238000011010 flushing procedure Methods 0.000 claims description 54
- 238000001514 detection method Methods 0.000 claims description 49
- 101100309712 Arabidopsis thaliana SD11 gene Proteins 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 2
- 239000010865 sewage Substances 0.000 abstract description 9
- 238000001914 filtration Methods 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000004140 cleaning Methods 0.000 description 5
- 238000007726 management method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/054—Input/output
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
- B01D29/68—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/11—Plc I-O input output
- G05B2219/1108—Relay module
Abstract
The invention relates to the technical field of sewage filtering device control, in particular to an intelligent backwashing control device, which comprises a pumping motor and a control circuit, wherein a three-phase power supply is connected with the pumping motor in series through a breaker QF, a contactor KM1 and a thermal relay RJ in sequence; the control circuit comprises a direct current switch power supply, a manual-automatic change-over switch QA1, a manual control circuit, a full-automatic control circuit, a plurality of valve coils and a main water pump coil KM1, wherein the direct current switch power supply provides a working power supply for the manual control circuit and the full-automatic control circuit. The invention has the beneficial effects that: the special management filter device is canceled, so that the manual management cost is effectively reduced; the filtering effectiveness of the equipment is ensured.
Description
Technical Field
The invention relates to the technical field of sewage filtering device control, in particular to an intelligent backwashing control device.
Background
At present, the sewage filtering device generally adopts a manual valve to control the communication state of each pipeline, and the control mode is simple, the input cost is low, but the automatic control is difficult to realize, and special management is needed. Such as: the patent application number of the novel backwashing filter disclosed in the prior Chinese patent is 201520269060.3, the novel backwashing filter comprises a main barrel, an auxiliary barrel, a dosing tank and a pump, wherein the auxiliary barrel is provided with an auxiliary sewage discharging valve and an auxiliary air discharging valve, and the main barrel is provided with a main air discharging valve; the top end barrel side of the auxiliary barrel is connected with a back flushing pipeline, a flushing valve is arranged on the back flushing pipeline, a sewage outlet of the main barrel is respectively connected with a main sewage pipeline and the other end of the back flushing pipeline through a three-way joint, and the main sewage pipeline is provided with a main sewage valve; the main barrel main outlet of the main barrel is respectively connected with a middle connecting pipe, a drain pipe and an air inlet pipe through four-way connectors, one end of the middle connecting pipe is respectively connected with a detection pipe and a circulating pipe through a three-way connector, the detection pipe is communicated with a dosing groove through a detection valve, and the circulating pipe is communicated with a five-way connector through a circulating valve; a water outlet valve is arranged on the drain pipe; one end of the air inlet pipe is sequentially connected with an air inlet valve, a pneumatic diaphragm pump, a diaphragm pump switch and an air compressor; the main barrel inlet of the main barrel is communicated with the pumping outlet of the pumping through a pipeline; the pump inlet of the pump is respectively connected with a dosing pipe, a water inlet pipe and a water delivery pipe through a five-way joint, the other end of the dosing pipe is connected with the dosing tank through a dosing valve, and the water inlet pipe is connected with a water source through an inlet valve; the water delivery pipe is connected and communicated with an outlet at the bottom end of the auxiliary barrel through a water delivery valve. The valve is a manual valve, so that automatic control is difficult to realize; meanwhile, the realization of automatic control is obviously a problem to be solved in industry in face of increasing labor cost.
Disclosure of Invention
The invention aims to provide an intelligent backwashing control device aiming at the defects and shortcomings of the prior art.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the invention relates to an intelligent backwashing control device, which comprises a pumping motor and a control circuit, wherein a three-phase power supply is connected with the pumping motor in series through a breaker QF, a contactor KM1 and a thermal relay RJ in sequence;
the device also comprises a water delivery valve indicator lamp H0, a detection valve indicator lamp H1, a dosing valve indicator lamp H2, an outlet valve indicator lamp H3, an inlet valve indicator lamp H5, a flushing valve indicator lamp H6, an exhaust valve indicator lamp H7, two side valve indicator lamps H10, a diaphragm valve indicator lamp H11, a main water pump indicator lamp H12 and an air inlet valve indicator lamp H15; the control circuit comprises a direct-current switch power supply, a manual-automatic switch QA1, a manual control circuit, a full-automatic control circuit, a water delivery valve coil K0, a detection valve coil K1, a dosing valve coil K2, an outlet valve coil K3, an inlet valve coil K5, a flushing valve coil K6, an exhaust valve coil K7, two side valve coils K10, a diaphragm valve coil K11, an air inlet valve coil K15 and a main water pump coil KM1;
the input end of the direct current switch power supply is connected with a single-phase alternating current power supply, a 24V direct current power supply is arranged at the output end of the direct current switch power supply, the negative end of the 24V direct current power supply is connected with an a1 port of a change-over switch QA1, an a2 port of the change-over switch QA1 is connected with a manual control circuit, and when the a1 port and the a2 port of the change-over switch QA1 are connected, a working power supply is provided for the manual control circuit; the starting and the closing of the water delivery valve coil K0, the detection valve coil K1, the dosing valve coil K2, the outlet valve coil K3, the inlet valve coil K5, the flushing valve coil K6, the exhaust valve coil K7, the two-side valve coil K10, the diaphragm valve coil K11, the air inlet valve coil K15 and the main water pump coil KM1 are controlled by a manual control circuit;
the port a3 of the change-over switch QA1 is connected with a full-automatic control circuit, and when the port a1 of the change-over switch QA1 is connected with the port a3, a working power supply is provided for the full-automatic control circuit; the starting and the closing of the water delivery valve coil K0, the detection valve coil K1, the dosing valve coil K2, the outlet valve coil K3, the inlet valve coil K5, the flushing valve coil K6, the exhaust valve coil K7, the two-side valve coil K10, the diaphragm valve coil K11, the air inlet valve coil K15 and the main water pump coil KM1 are controlled through a full-automatic control circuit.
Further, the manual control circuit comprises a diaphragm valve manual switch SD1, a two-side valve manual switch SD2, an exhaust valve manual switch SD3, a flushing valve manual switch SD4, an inlet valve manual switch SD5, an outlet valve manual switch SD6, a dosing valve manual switch SD7, a detection valve manual switch SD8, a water delivery valve manual switch SD9, an air inlet valve manual switch SD11 and a main water pump manual switch SD12,
one end of the diaphragm valve manual switch SD1, the two-side valve manual switch SD2, the exhaust valve manual switch SD3, the flushing valve manual switch SD4, the inlet valve manual switch SD5, the outlet valve manual switch SD6, the dosing valve manual switch SD7, the detection valve manual switch SD8, the water delivery valve manual switch SD9, the air inlet valve manual switch SD11 and the main water pump manual switch SD12 are respectively connected with an a2 port of the change-over switch QA 1;
the other end of the manual diaphragm valve switch SD1 is connected with the diaphragm valve indicator lamp H11 in series and then is connected with the positive end of the 24V direct current power supply, one end of the diaphragm valve coil K11 is connected with one end of the diaphragm valve indicator lamp H11 in parallel, and the other end of the diaphragm valve coil K11 is connected with the positive end of the 24V direct current power supply in parallel;
the other end of the manual switch SD2 of the two-side valve is connected in series with the two-side valve indicator lamp H10 and then is connected with the positive end of the 24V direct current power supply, one end of the two-side valve coil K10 is connected in parallel with one end of the two-side valve indicator lamp H10, and the other end of the two-side valve coil K10 is connected in parallel with the positive end of the 24V direct current power supply;
the other end of the manual exhaust valve switch SD3 is connected with an exhaust valve indicator lamp H7 in series and then connected with the positive end of a 24V direct current power supply, one end of an exhaust valve coil K7 is connected with one end of the exhaust valve indicator lamp H7 in parallel, and the other end of the exhaust valve coil K7 is connected with the positive end of the 24V direct current power supply in parallel;
the other end of the flushing valve manual switch SD4 is connected with a flushing valve indicator lamp H6 in series and then is connected with the positive end of a 24V direct current power supply, one end of a flushing valve coil K6 is connected with one end of the flushing valve indicator lamp H6 in parallel, and the other end of the flushing valve coil K6 is connected with the positive end of the 24V direct current power supply in parallel;
the other end of the inlet valve manual switch SD5 is connected with an inlet valve indicator lamp H5 in series and then is connected with the positive end of a 24V direct current power supply, one end of an inlet valve coil K5 is connected with one end of the inlet valve indicator lamp H5 in parallel, and the other end of the inlet valve coil K5 is connected with the positive end of the 24V direct current power supply in parallel;
the other end of the manual outlet valve switch SD6 is connected with an outlet valve indicator lamp H3 in series and then is connected with the positive end of a 24V direct current power supply, one end of an outlet valve coil K3 is connected with one end of the outlet valve indicator lamp H3 in parallel, and the other end of the outlet valve coil K3 is connected with the positive end of the 24V direct current power supply in parallel;
the other end of the manual switch SD7 of the dosing valve is connected in series with a dosing valve indicator lamp H2 and then is connected with the positive end of a 24V direct current power supply, one end of a dosing valve coil K2 is connected in parallel with one end of the dosing valve indicator lamp H2, and the other end of the dosing valve coil K2 is connected in parallel with the positive end of the 24V direct current power supply;
the other end of the manual detection valve switch SD8 is connected with the detection valve indicator lamp H1 in series and then is connected with the positive end of the 24V direct current power supply, one end of the detection valve coil K1 is connected with one end of the detection valve indicator lamp H1 in parallel, and the other end of the detection valve coil K1 is connected with the positive end of the 24V direct current power supply in parallel;
the other end of the manual water delivery valve switch SD9 is connected with a water delivery valve indicator lamp H0 in series and then connected with the positive end of a 24V direct current power supply, one end of a water delivery valve coil K0 is connected with one end of the water delivery valve indicator lamp H0 in parallel, and the other end of the water delivery valve coil K0 is connected with the positive end of the 24V direct current power supply in parallel;
the other end of the air inlet valve manual switch SD11 is connected with an air inlet valve indicator lamp H15 in series and then is connected with the positive end of a 24V direct current power supply, one end of an air inlet valve coil K15 is connected with one end of the air inlet valve indicator lamp H15 in parallel, and the other end of the air inlet valve coil K15 is connected with the positive end of the 24V direct current power supply in parallel;
the other end of the manual switch SD12 of the main water pump is connected with the main water pump indicator lamp H12 in series and then is connected with the positive end of the 24V direct-current power supply, one end of the main water pump coil KM1 is connected with one end of the main water pump indicator lamp H12 in parallel, and the other end of the main water pump coil KM1 is connected with the positive end of the 24V direct-current power supply in parallel.
Further, the full-automatic control circuit comprises an emergency stop button QA2, a start button QA3, a stop button QA4, a PLC controller, a pressure transmitter P, an operation lamp H13 and a buzzer H14;
the PLC is provided with input ends X0, X1, X2, X3, X4, X5, X6 and X7, and is provided with output ends Y0, Y1, Y2, Y3, Y5, Y6, Y7, Y10, Y11, Y12, Y13, Y14 and Y15 and an analog input end A02;
the pressure transmitter P is arranged in the inner cavity of the main barrel and is used for collecting the pressure in the inner cavity of the main barrel in real time; the thermal relay RJ is provided with a thermal relay normally open switch RJ; the side wall of the inner cavity of the dosing tank is provided with an ultrahigh water level normally open switch SA1, a high water level normally open switch SA4, a medium water level normally open switch SA3 and a low water level normally open switch SA2 from top to bottom in sequence;
the positive electrode of the PLC is connected with the positive electrode end of the 24V direct current power supply, the negative electrode and the COM end of the PLC are connected in parallel to the a3 port of the change-over switch QA1, and the COM end, the GND end, the CM1 end, the CM2 end and the CM3 end of the PLC are respectively connected with the negative electrode end of the 24V direct current power supply;
the input end X0 is connected with the negative end of the 24V direct current power supply through an emergency stop button QA 2; the input end X1 is connected with the negative end of the 24V direct current power supply through a start button QA 3; the input end X2 is connected with the negative end of the 24V direct current power supply through a stop button QA 4; the input end X3 is connected with the negative end of the 24V direct current power supply through the ultrahigh water level normally open switch SA 1; the input end X4 is connected with the negative end of the 24V direct current power supply through a low water level normally open switch SA2; the input end X5 is connected with the negative end of the 24V direct current power supply through a medium-water level normally open switch SA 3; the input end X6 is connected with the negative end of the 24V direct current power supply through a high water level normally open switch SA 4; the input end X7 is connected with the negative end of the 24V direct current power supply through a thermal relay normally open switch RJ; the analog quantity input end A02 is connected with the positive end of the 24V direct current power supply through the pressure transmitter P;
the output end Y0 is connected with the positive end of the 24V direct current power supply through a water delivery valve coil K0, the output end Y1 is connected with the positive end of the 24V direct current power supply through a detection valve coil K1, the output end Y2 is connected with the positive end of the 24V direct current power supply through a dosing valve coil K2, the output end Y3 is connected with the positive end of the 24V direct current power supply through an outlet valve coil K3, the output end Y5 is connected with the positive end of the 24V direct current power supply through an inlet valve coil K5, the output end Y6 is connected with the positive end of the 24V direct current power supply through a flushing valve coil K6, the output end Y7 is connected with the positive end of the 24V direct current power supply through an exhaust valve coil K7, the output end Y10 is connected with the positive end of the 24V direct current power supply through two side valve coils K10, the output end Y11 is connected with the positive end of the 24V direct current power supply through a diaphragm valve coil K11, the output end Y6 is connected with the positive end of the 24V direct current power supply through a main valve coil K13, and the output end Y13 is connected with the positive end of the output lamp Y14 through a water inlet valve Y13;
further, one end of the water delivery valve indicator lamp H0, the detection valve indicator lamp H1, the dosing valve indicator lamp H2, the outlet valve indicator lamp H3, the inlet valve indicator lamp H5, the flushing valve indicator lamp H6, the exhaust valve indicator lamp H7, the two-side valve indicator lamp H10, the diaphragm valve indicator lamp H11, the main water pump indicator lamp H12 and the air inlet valve indicator lamp H15 are all connected with the positive end of the 24V direct current power supply;
the other end of the water delivery valve indicator lamp H0 is connected in parallel with the output end Y0; the other end of the detection valve indicator lamp H1 is connected in parallel with the output end Y1; the other end of the dosing valve indicator lamp H2 is connected in parallel with the output end Y2; the other end of the outlet valve indicator lamp H3 is connected in parallel with the output end Y3; the other end of the inlet valve indicator lamp H5 is connected in parallel with the output end Y5; the other end of the flushing valve indicator lamp H6 is connected in parallel with the output end Y6; the other end of the exhaust valve indicator lamp H7 is connected in parallel with the output end Y7; the other end of the valve indicator lamp H10 on the two sides is connected in parallel with the output end Y10; the other end of the diaphragm valve indicator lamp H11 is connected in parallel with the output end Y11; the other end of the main water pump indicator lamp H12 is connected in parallel with the output end Y12; the other end of the air inlet valve indicator lamp H15 is connected in parallel with the output end Y15.
After the structure is adopted, the invention has the beneficial effects that: the automatic control is realized through the full-automatic control circuit, a special management filter device is canceled, and the manual management cost is effectively reduced; the pressure in the inner cavity of the main barrel is collected through the pressure transmitter P, the work of cleaning the filter element is controlled through the automatic control device, the automation degree of the equipment is greatly improved, the filtering effectiveness of the equipment can be ensured, and the manual monitoring cost can be saved; the manual control circuit is used as an important supplement for the full-automatic control circuit, so that normal production requirements can be ensured, and more convenience can be provided for operators.
Drawings
FIG. 1 is a main control circuit diagram of the present invention;
FIG. 2 is a manual control circuit diagram of the present invention;
FIG. 3 is a fully automatic control circuit diagram of the present invention;
FIG. 4 is a schematic diagram of the electrically operated valve connection of the present invention;
1. a main barrel; 1-1, a main barrel inlet; 1-2, a main outlet of the main barrel; 1-3, a sewage outlet;
2. flushing the manual valve; 2a, flushing the electric valve; 3. a main blowdown manual valve; 4. an auxiliary barrel;
4-1, a filter vat; 4-1a, filtering holes; 4-2, a water storage barrel; 5. a secondary blowdown manual valve;
6. a secondary exhaust manual valve; 7. a main exhaust manual valve; 7a, a main exhaust electric valve;
8. detecting a manual valve; 8a, detecting an electric valve; 9. a dosing tank; 10. a dosing manual valve;
10a, a dosing electric valve; 11. a cycling manual valve; 12. an inlet manual valve;
12a, an inlet motor valve; 13. pumping; 13-1, pump inlet; 13-2, pump outlet;
14. a pneumatic diaphragm pump; 15. an air compressor;
16. a diaphragm pump switch; 16a, diaphragm pump electric valve switch;
17. an air inlet manual valve; 17a, an air inlet electric valve;
18. a water delivery manual valve; 18a, a water delivery electric valve;
19. a water outlet manual valve; 19a, a water outlet electric valve;
20. a four-way joint; 21. a five-way joint; 22. a side manual valve; 22a, side electric valve;
23. a main barrel side manual valve; 23a, a main barrel side electric valve.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 to 3, the intelligent backwashing control device comprises a pumping motor and a control circuit, wherein a three-phase power supply is connected with the pumping motor in series through a breaker QF, a contactor KM1 and a thermal relay RJ in sequence; the three-phase power supply, the breaker QF, the contactor KM1, the thermal relay RJ and the pumping motor form a main control circuit.
The device also comprises a water delivery valve indicator lamp H0, a detection valve indicator lamp H1, a dosing valve indicator lamp H2, an outlet valve indicator lamp H3, an inlet valve indicator lamp H5, a flushing valve indicator lamp H6, an exhaust valve indicator lamp H7, two side valve indicator lamps H10, a diaphragm valve indicator lamp H11, a main water pump indicator lamp H12 and an air inlet valve indicator lamp H15; the control circuit comprises a direct-current switch power supply, a manual-automatic switch QA1, a manual control circuit, a full-automatic control circuit, a water delivery valve coil K0, a detection valve coil K1, a dosing valve coil K2, an outlet valve coil K3, an inlet valve coil K5, a flushing valve coil K6, an exhaust valve coil K7, two side valve coils K10, a diaphragm valve coil K11, an air inlet valve coil K15 and a main water pump coil KM1.
The input end of the direct current switch power supply is connected with a single-phase alternating current power supply, a 24V direct current power supply is arranged at the output end of the direct current switch power supply, the negative end of the 24V direct current power supply is connected with an a1 port of a change-over switch QA1, an a2 port of the change-over switch QA1 is connected with a manual control circuit, and when the a1 port and the a2 port of the change-over switch QA1 are connected, a working power supply is provided for the manual control circuit; the manual control circuit is used for controlling the starting and closing of the water delivery valve coil K0, the detection valve coil K1, the dosing valve coil K2, the outlet valve coil K3, the inlet valve coil K5, the flushing valve coil K6, the exhaust valve coil K7, the two-side valve coil K10, the diaphragm valve coil K11, the air inlet valve coil K15 and the main water pump coil KM1.
The port a3 of the change-over switch QA1 is connected with a full-automatic control circuit, and when the port a1 of the change-over switch QA1 is connected with the port a3, a working power supply is provided for the full-automatic control circuit; the starting and the closing of the water delivery valve coil K0, the detection valve coil K1, the dosing valve coil K2, the outlet valve coil K3, the inlet valve coil K5, the flushing valve coil K6, the exhaust valve coil K7, the two-side valve coil K10, the diaphragm valve coil K11, the air inlet valve coil K15 and the main water pump coil KM1 are controlled through a full-automatic control circuit.
As shown in fig. 2, the manual control circuit includes a diaphragm valve manual switch SD1, a two-side valve manual switch SD2, an exhaust valve manual switch SD3, a flushing valve manual switch SD4, an inlet valve manual switch SD5, an outlet valve manual switch SD6, a dosing valve manual switch SD7, a detection valve manual switch SD8, a water delivery valve manual switch SD9, an intake valve manual switch SD11, and a main water pump manual switch SD12 as an example of the present invention,
one end of the diaphragm valve manual switch SD1, the two-side valve manual switch SD2, the exhaust valve manual switch SD3, the flushing valve manual switch SD4, the inlet valve manual switch SD5, the outlet valve manual switch SD6, the dosing valve manual switch SD7, the detection valve manual switch SD8, the water delivery valve manual switch SD9, the air inlet valve manual switch SD11 and the main water pump manual switch SD12 are respectively connected with an a2 port of the change-over switch QA 1;
the other end of the manual diaphragm valve switch SD1 is connected with the diaphragm valve indicator lamp H11 in series and then is connected with the positive end of the 24V direct current power supply, one end of the diaphragm valve coil K11 is connected with one end of the diaphragm valve indicator lamp H11 in parallel, and the other end of the diaphragm valve coil K11 is connected with the positive end of the 24V direct current power supply in parallel;
the other end of the manual switch SD2 of the two-side valve is connected in series with the two-side valve indicator lamp H10 and then is connected with the positive end of the 24V direct current power supply, one end of the two-side valve coil K10 is connected in parallel with one end of the two-side valve indicator lamp H10, and the other end of the two-side valve coil K10 is connected in parallel with the positive end of the 24V direct current power supply;
the other end of the manual exhaust valve switch SD3 is connected with an exhaust valve indicator lamp H7 in series and then connected with the positive end of a 24V direct current power supply, one end of an exhaust valve coil K7 is connected with one end of the exhaust valve indicator lamp H7 in parallel, and the other end of the exhaust valve coil K7 is connected with the positive end of the 24V direct current power supply in parallel;
the other end of the flushing valve manual switch SD4 is connected with a flushing valve indicator lamp H6 in series and then is connected with the positive end of a 24V direct current power supply, one end of a flushing valve coil K6 is connected with one end of the flushing valve indicator lamp H6 in parallel, and the other end of the flushing valve coil K6 is connected with the positive end of the 24V direct current power supply in parallel;
the other end of the inlet valve manual switch SD5 is connected with an inlet valve indicator lamp H5 in series and then is connected with the positive end of a 24V direct current power supply, one end of an inlet valve coil K5 is connected with one end of the inlet valve indicator lamp H5 in parallel, and the other end of the inlet valve coil K5 is connected with the positive end of the 24V direct current power supply in parallel;
the other end of the manual outlet valve switch SD6 is connected with an outlet valve indicator lamp H3 in series and then is connected with the positive end of a 24V direct current power supply, one end of an outlet valve coil K3 is connected with one end of the outlet valve indicator lamp H3 in parallel, and the other end of the outlet valve coil K3 is connected with the positive end of the 24V direct current power supply in parallel;
the other end of the manual switch SD7 of the dosing valve is connected in series with a dosing valve indicator lamp H2 and then is connected with the positive end of a 24V direct current power supply, one end of a dosing valve coil K2 is connected in parallel with one end of the dosing valve indicator lamp H2, and the other end of the dosing valve coil K2 is connected in parallel with the positive end of the 24V direct current power supply;
the other end of the manual detection valve switch SD8 is connected with the detection valve indicator lamp H1 in series and then is connected with the positive end of the 24V direct current power supply, one end of the detection valve coil K1 is connected with one end of the detection valve indicator lamp H1 in parallel, and the other end of the detection valve coil K1 is connected with the positive end of the 24V direct current power supply in parallel;
the other end of the manual water delivery valve switch SD9 is connected with a water delivery valve indicator lamp H0 in series and then connected with the positive end of a 24V direct current power supply, one end of a water delivery valve coil K0 is connected with one end of the water delivery valve indicator lamp H0 in parallel, and the other end of the water delivery valve coil K0 is connected with the positive end of the 24V direct current power supply in parallel;
the other end of the air inlet valve manual switch SD11 is connected with an air inlet valve indicator lamp H15 in series and then is connected with the positive end of a 24V direct current power supply, one end of an air inlet valve coil K15 is connected with one end of the air inlet valve indicator lamp H15 in parallel, and the other end of the air inlet valve coil K15 is connected with the positive end of the 24V direct current power supply in parallel;
the other end of the manual switch SD12 of the main water pump is connected with the main water pump indicator lamp H12 in series and then is connected with the positive end of the 24V direct-current power supply, one end of the main water pump coil KM1 is connected with one end of the main water pump indicator lamp H12 in parallel, and the other end of the main water pump coil KM1 is connected with the positive end of the 24V direct-current power supply in parallel.
When the full-automatic control circuit has faults or overhauls, the work of each valve can be controlled by the manual control circuit, and the valve is used as an important supplement for the control of the full-automatic control circuit, so that the on-site operation is convenient.
As shown in fig. 3, the full-automatic control circuit includes, as an example of the present invention, an emergency stop button QA2, a start button QA3, a stop button QA4, a PLC controller, a pressure transmitter P, an operating lamp H13, and a buzzer H14;
the PLC is provided with input ends X0, X1, X2, X3, X4, X5, X6 and X7, and is provided with output ends Y0, Y1, Y2, Y3, Y5, Y6, Y7, Y10, Y11, Y12, Y13, Y14 and Y15 and an analog input end A02;
the pressure transmitter P is arranged in the inner cavity of the main barrel and is used for collecting the pressure in the inner cavity of the main barrel in real time; the thermal relay RJ is provided with a thermal relay normally open switch RJ; the side wall of the inner cavity of the dosing tank is provided with an ultrahigh water level normally open switch SA1, a high water level normally open switch SA4, a medium water level normally open switch SA3 and a low water level normally open switch SA2 from top to bottom in sequence; the ultrahigh water level normally open switch SA1 is used for detecting the ultrahigh water level position of the inner cavity of the dosing tank, namely the ultrahigh water level normally open switch; the high water level normally open switch SA4 is used for detecting the high water level position of the inner cavity of the dosing tank, namely the high water level normally open switch; the medium-water-level normally-open switch SA3 is used for detecting the medium-water-level position of the inner cavity of the dosing tank, namely the medium-water-level normally-open switch; the low water level normally open switch SA2 is used for detecting the low water level position of the inner cavity of the dosing tank, namely the low water level normally open switch.
The positive electrode of the PLC is connected with the positive electrode end of the 24V direct current power supply, the negative electrode and the COM end of the PLC are connected in parallel to the a3 port of the change-over switch QA1, and the COM end, the GND end, the CM1 end, the CM2 end and the CM3 end of the PLC are respectively connected with the negative electrode end of the 24V direct current power supply;
the input end X0 is connected with the negative end of the 24V direct current power supply through an emergency stop button QA 2; the input end X1 is connected with the negative end of the 24V direct current power supply through a start button QA 3; the input end X2 is connected with the negative end of the 24V direct current power supply through a stop button QA 4; the input end X3 is connected with the negative end of the 24V direct current power supply through the ultrahigh water level normally open switch SA 1; the input end X4 is connected with the negative end of the 24V direct current power supply through a low water level normally open switch SA2; the input end X5 is connected with the negative end of the 24V direct current power supply through a medium-water level normally open switch SA 3; the input end X6 is connected with the negative end of the 24V direct current power supply through a high water level normally open switch SA 4; the input end X7 is connected with the negative end of the 24V direct current power supply through a thermal relay normally open switch RJ; the analog quantity input end A02 is connected with the positive end of the 24V direct current power supply through the pressure transmitter P;
the output end Y0 is connected with the positive end of the 24V direct current power supply through a water delivery valve coil K0, the output end Y1 is connected with the positive end of the 24V direct current power supply through a detection valve coil K1, the output end Y2 is connected with the positive end of the 24V direct current power supply through a dosing valve coil K2, the output end Y3 is connected with the positive end of the 24V direct current power supply through an outlet valve coil K3, the output end Y5 is connected with the positive end of the 24V direct current power supply through an inlet valve coil K5, the output end Y6 is connected with the positive end of the 24V direct current power supply through a flushing valve coil K6, the output end Y7 is connected with the positive end of the 24V direct current power supply through an exhaust valve coil K7, the output end Y10 is connected with the positive end of the 24V direct current power supply through two side valve coils K10, the output end Y11 is connected with the positive end of the 24V direct current power supply through a diaphragm valve coil K11, the output end Y6 is connected with the positive end of the 24V direct current power supply through a main valve coil K13, and the output end Y13 is connected with the positive end of the output lamp Y14 through a water inlet valve Y13;
further, one end of the water delivery valve indicator lamp H0, the detection valve indicator lamp H1, the dosing valve indicator lamp H2, the outlet valve indicator lamp H3, the inlet valve indicator lamp H5, the flushing valve indicator lamp H6, the exhaust valve indicator lamp H7, the two-side valve indicator lamp H10, the diaphragm valve indicator lamp H11, the main water pump indicator lamp H12 and the air inlet valve indicator lamp H15 are all connected with the positive end of the 24V direct current power supply;
the other end of the water delivery valve indicator lamp H0 is connected in parallel with the output end Y0; the other end of the detection valve indicator lamp H1 is connected in parallel with the output end Y1; the other end of the dosing valve indicator lamp H2 is connected in parallel with the output end Y2; the other end of the outlet valve indicator lamp H3 is connected in parallel with the output end Y3; the other end of the inlet valve indicator lamp H5 is connected in parallel with the output end Y5; the other end of the flushing valve indicator lamp H6 is connected in parallel with the output end Y6; the other end of the exhaust valve indicator lamp H7 is connected in parallel with the output end Y7; the other end of the valve indicator lamp H10 on the two sides is connected in parallel with the output end Y10; the other end of the diaphragm valve indicator lamp H11 is connected in parallel with the output end Y11; the other end of the main water pump indicator lamp H12 is connected in parallel with the output end Y12; the other end of the air inlet valve indicator lamp H15 is connected in parallel with the output end Y15.
As shown in fig. 4, the main tank inlet 1-1 communicates with the pump outlet 13-2 through a main tank side manual valve 23; the side wall of the main barrel 1 is also provided with two main barrel side inlets; the two main barrel side inlets are respectively communicated with the pumping outlet 13-2 through a side manual valve 22. The side electric valve 22a is connected in parallel with two ends of the side manual valve 22; the main barrel side electric valve 23a is connected in parallel with two ends of the main barrel side manual valve 23; by additionally installing the electric valve, automatic control can be conveniently realized. The coil of the side electric valve 22a is a two-side valve coil K10.
The two ends of the flushing manual valve 2 are connected with a flushing electric valve 2a in parallel, and a coil of the flushing electric valve 2a is a flushing valve coil K6; the two ends of the main exhaust manual valve 7 are connected with a main exhaust electric valve 7a in parallel, and the coil of the main exhaust electric valve 7a is an exhaust valve coil K7; the two ends of the detection manual valve 8 are connected in parallel with a detection electric valve 8a, and a coil of the detection electric valve 8a is a detection valve coil K1; the two ends of the inlet manual valve 12 are connected with an inlet electric valve 12a in parallel, and the coil of the inlet electric valve 12a is an inlet valve coil K5; the two ends of the diaphragm pump switch 16 are connected in parallel with a diaphragm pump electric valve switch 16a, and a coil of the diaphragm pump electric valve switch 16a is a diaphragm valve coil K11; the two ends of the air inlet manual valve 17 are connected with an air inlet electric valve 17a in parallel, and the coil of the air inlet electric valve 17a is an air inlet valve coil K15; the two ends of the water delivery manual valve 18 are connected with a water delivery electric valve 18a in parallel, and the coil of the water delivery electric valve 18a is a water delivery valve coil K0; the two ends of the water outlet manual valve 19 are connected with a water outlet electric valve 19a in parallel, and the coil of the water outlet electric valve 19a is an outlet valve coil K3; the two ends of the dosing manual valve 10 are connected in parallel with a dosing electric valve 10a, and the coil of the dosing electric valve 10a is a dosing valve coil K2.
The working principle of the full-automatic control circuit is as follows:
firstly, when the machine filters normally, the pressure transmitter P monitors the pressure of the main barrel in real time, and when the pressure of the main barrel 1 reaches or exceeds the normal pressure (or the set pressure), the filter element or the filter bag is blocked;
the second step, there is the following automatic control sequentially at this moment: the inlet valve coil K5 closes the inlet electric valve 12a, the outlet valve coil K3 closes the outlet electric valve 19a, the pneumatic diaphragm pump 14 is started, the diaphragm pump electric valve switch 16a is opened by the diaphragm valve coil K11, the inlet electric valve 17a is opened by the inlet valve coil K15, the flushing electric valve 2a is opened by the flushing valve coil K6 (the principle is not substantially different from the prior art for cleaning the filter element in the backwashing process).
When the pressure transmitter P monitors that the pressure of the main barrel 1 reaches or exceeds the normal pressure (or the set pressure) after the cleaning is finished, repeating the work of the second step; when the pressure transmitter P monitors that the pressure of the main tank 1 is reduced to or below the normal pressure (or set pressure) after the cleaning is completed, the machine filters normally.
The invention has the beneficial effects that: the automatic control is realized through the full-automatic control circuit, a special management filter device is canceled, and the manual management cost is effectively reduced; the pressure in the inner cavity of the main barrel is collected through the pressure transmitter P, the work of cleaning the filter element is controlled through the automatic control device, the automation degree of the equipment is greatly improved, the filtering effectiveness of the equipment can be ensured, and the manual monitoring cost can be saved; the manual control circuit is used as an important supplement for the full-automatic control circuit, so that normal production requirements can be ensured, and more convenience can be provided for operators.
The foregoing description is only of the preferred embodiments of the invention, and all changes and modifications that come within the meaning and range of equivalency of the structures, features and principles of the invention are therefore intended to be embraced therein.
Claims (2)
1. The intelligent backwashing control device comprises a pumping motor and a control circuit, wherein a three-phase power supply is connected with the pumping motor in series through a breaker QF, a contactor KM1 and a thermal relay RJ in sequence;
the method is characterized in that: the device also comprises a water delivery valve indicator lamp H0, a detection valve indicator lamp H1, a dosing valve indicator lamp H2, an outlet valve indicator lamp H3, an inlet valve indicator lamp H5, a flushing valve indicator lamp H6, an exhaust valve indicator lamp H7, two side valve indicator lamps H10, a diaphragm valve indicator lamp H11, a main water pump indicator lamp H12 and an air inlet valve indicator lamp H15; the control circuit comprises a direct current switch power supply, a manual-automatic switch QA1, a manual control circuit, a full-automatic control circuit, a water delivery valve coil K0, a detection valve coil K1, a dosing valve coil K2, an outlet valve coil K3, an inlet valve coil K5, a flushing valve coil K6, an exhaust valve coil K7, two side valve coils K10, a diaphragm valve coil K11, an air inlet valve coil K15 and a main water pump coil KM1,
the input end of the direct current switch power supply is connected with a single-phase alternating current power supply, a 24V direct current power supply is arranged at the output end of the direct current switch power supply, the negative end of the 24V direct current power supply is connected with an a1 port of a change-over switch QA1, an a2 port of the change-over switch QA1 is connected with a manual control circuit, and when the a1 port and the a2 port of the change-over switch QA1 are connected, a working power supply is provided for the manual control circuit; the starting and the closing of the water delivery valve coil K0, the detection valve coil K1, the dosing valve coil K2, the outlet valve coil K3, the inlet valve coil K5, the flushing valve coil K6, the exhaust valve coil K7, the two-side valve coil K10, the diaphragm valve coil K11, the air inlet valve coil K15 and the main water pump coil KM1 are controlled by a manual control circuit;
the port a3 of the change-over switch QA1 is connected with a full-automatic control circuit, and when the port a1 of the change-over switch QA1 is connected with the port a3, a working power supply is provided for the full-automatic control circuit; the starting and the closing of the water delivery valve coil K0, the detection valve coil K1, the dosing valve coil K2, the outlet valve coil K3, the inlet valve coil K5, the flushing valve coil K6, the exhaust valve coil K7, the two-side valve coil K10, the diaphragm valve coil K11, the air inlet valve coil K15 and the main water pump coil KM1 are controlled by a full-automatic control circuit;
the manual control circuit comprises a diaphragm valve manual switch SD1, a two-side valve manual switch SD2, an exhaust valve manual switch SD3, a flushing valve manual switch SD4, an inlet valve manual switch SD5, an outlet valve manual switch SD6, a dosing valve manual switch SD7, a detection valve manual switch SD8, a water delivery valve manual switch SD9, an air inlet valve manual switch SD11 and a main water pump manual switch SD12,
one end of the diaphragm valve manual switch SD1, the two-side valve manual switch SD2, the exhaust valve manual switch SD3, the flushing valve manual switch SD4, the inlet valve manual switch SD5, the outlet valve manual switch SD6, the dosing valve manual switch SD7, the detection valve manual switch SD8, the water delivery valve manual switch SD9, the air inlet valve manual switch SD11 and the main water pump manual switch SD12 are respectively connected with an a2 port of the change-over switch QA 1;
the other end of the manual diaphragm valve switch SD1 is connected with the diaphragm valve indicator lamp H11 in series and then is connected with the positive end of the 24V direct current power supply, one end of the diaphragm valve coil K11 is connected with one end of the diaphragm valve indicator lamp H11 in parallel, and the other end of the diaphragm valve coil K11 is connected with the positive end of the 24V direct current power supply in parallel;
the other end of the manual switch SD2 of the two-side valve is connected in series with the two-side valve indicator lamp H10 and then is connected with the positive end of the 24V direct current power supply, one end of the two-side valve coil K10 is connected in parallel with one end of the two-side valve indicator lamp H10, and the other end of the two-side valve coil K10 is connected in parallel with the positive end of the 24V direct current power supply;
the other end of the manual exhaust valve switch SD3 is connected with an exhaust valve indicator lamp H7 in series and then connected with the positive end of a 24V direct current power supply, one end of an exhaust valve coil K7 is connected with one end of the exhaust valve indicator lamp H7 in parallel, and the other end of the exhaust valve coil K7 is connected with the positive end of the 24V direct current power supply in parallel;
the other end of the flushing valve manual switch SD4 is connected with a flushing valve indicator lamp H6 in series and then is connected with the positive end of a 24V direct current power supply, one end of a flushing valve coil K6 is connected with one end of the flushing valve indicator lamp H6 in parallel, and the other end of the flushing valve coil K6 is connected with the positive end of the 24V direct current power supply in parallel;
the other end of the inlet valve manual switch SD5 is connected with an inlet valve indicator lamp H5 in series and then is connected with the positive end of a 24V direct current power supply, one end of an inlet valve coil K5 is connected with one end of the inlet valve indicator lamp H5 in parallel, and the other end of the inlet valve coil K5 is connected with the positive end of the 24V direct current power supply in parallel;
the other end of the manual outlet valve switch SD6 is connected with an outlet valve indicator lamp H3 in series and then is connected with the positive end of a 24V direct current power supply, one end of an outlet valve coil K3 is connected with one end of the outlet valve indicator lamp H3 in parallel, and the other end of the outlet valve coil K3 is connected with the positive end of the 24V direct current power supply in parallel;
the other end of the manual switch SD7 of the dosing valve is connected in series with a dosing valve indicator lamp H2 and then is connected with the positive end of a 24V direct current power supply, one end of a dosing valve coil K2 is connected in parallel with one end of the dosing valve indicator lamp H2, and the other end of the dosing valve coil K2 is connected in parallel with the positive end of the 24V direct current power supply;
the other end of the manual detection valve switch SD8 is connected with the detection valve indicator lamp H1 in series and then is connected with the positive end of the 24V direct current power supply, one end of the detection valve coil K1 is connected with one end of the detection valve indicator lamp H1 in parallel, and the other end of the detection valve coil K1 is connected with the positive end of the 24V direct current power supply in parallel;
the other end of the manual water delivery valve switch SD9 is connected with a water delivery valve indicator lamp H0 in series and then connected with the positive end of a 24V direct current power supply, one end of a water delivery valve coil K0 is connected with one end of the water delivery valve indicator lamp H0 in parallel, and the other end of the water delivery valve coil K0 is connected with the positive end of the 24V direct current power supply in parallel;
the other end of the air inlet valve manual switch SD11 is connected with an air inlet valve indicator lamp H15 in series and then is connected with the positive end of a 24V direct current power supply, one end of an air inlet valve coil K15 is connected with one end of the air inlet valve indicator lamp H15 in parallel, and the other end of the air inlet valve coil K15 is connected with the positive end of the 24V direct current power supply in parallel;
the other end of the main water pump manual switch SD12 is connected with the main water pump indicator lamp H12 in series and then is connected with the positive end of the 24V direct current power supply, one end of the main water pump coil KM1 is connected with one end of the main water pump indicator lamp H12 in parallel, and the other end of the main water pump coil KM1 is connected with the positive end of the 24V direct current power supply in parallel;
the full-automatic control circuit comprises an emergency stop button QA2, a start button QA3, a stop button QA4, a PLC controller, a pressure transmitter P, an operation lamp H13 and a buzzer H14;
the PLC is provided with input ends X0, X1, X2, X3, X4, X5, X6 and X7, and is provided with output ends Y0, Y1, Y2, Y3, Y5, Y6, Y7, Y10, Y11, Y12, Y13, Y14 and Y15 and an analog input end A02;
the pressure transmitter P is arranged in the inner cavity of the main barrel and is used for collecting the pressure in the inner cavity of the main barrel in real time; the thermal relay RJ is provided with a thermal relay normally open switch RJ; the side wall of the inner cavity of the dosing tank is provided with an ultrahigh water level normally open switch SA1, a high water level normally open switch SA4, a medium water level normally open switch SA3 and a low water level normally open switch SA2 from top to bottom in sequence;
the positive electrode of the PLC is connected with the positive electrode end of the 24V direct current power supply, the negative electrode and the COM end of the PLC are connected in parallel to the a3 port of the change-over switch QA1, and the COM end, the GND end, the CM1 end, the CM2 end and the CM3 end of the PLC are respectively connected with the negative electrode end of the 24V direct current power supply;
the input end X0 is connected with the negative end of the 24V direct current power supply through an emergency stop button QA 2; the input end X1 is connected with the negative end of the 24V direct current power supply through a start button QA 3; the input end X2 is connected with the negative end of the 24V direct current power supply through a stop button QA 4; the input end X3 is connected with the negative end of the 24V direct current power supply through the ultrahigh water level normally open switch SA 1; the input end X4 is connected with the negative end of the 24V direct current power supply through a low water level normally open switch SA2; the input end X5 is connected with the negative end of the 24V direct current power supply through a medium-water level normally open switch SA 3; the input end X6 is connected with the negative end of the 24V direct current power supply through a high water level normally open switch SA 4; the input end X7 is connected with the negative end of the 24V direct current power supply through a thermal relay normally open switch RJ; the analog quantity input end A02 is connected with the positive end of the 24V direct current power supply through the pressure transmitter P;
the output end Y0 is connected with the positive end of the 24V direct current power supply through the water delivery valve coil K0, the output end Y1 is connected with the positive end of the 24V direct current power supply through the detection valve coil K1, the output end Y2 is connected with the positive end of the 24V direct current power supply through the dosing valve coil K2, the output end Y3 is connected with the positive end of the 24V direct current power supply through the outlet valve coil K3, the output end Y5 is connected with the positive end of the 24V direct current power supply through the inlet valve coil K5, the output end Y6 is connected with the positive end of the 24V direct current power supply through the flushing valve coil K6, the output end Y7 is connected with the positive end of the 24V direct current power supply through the exhaust valve coil K7, the output end Y10 is connected with the positive end of the 24V direct current power supply through the two-side valve coils K10, the output end Y11 is connected with the positive end of the 24V direct current power supply through the diaphragm valve coil K11, the output end Y6 is connected with the positive end of the 24V direct current power supply through the main valve coil K13 through the inlet valve coil Y13, and the output end Y13 is connected with the positive end of the air inlet lamp Y14.
2. The intelligent backwash control device according to claim 1, wherein: one end of the water delivery valve indicator lamp H0, the detection valve indicator lamp H1, the dosing valve indicator lamp H2, the outlet valve indicator lamp H3, the inlet valve indicator lamp H5, the flushing valve indicator lamp H6, the exhaust valve indicator lamp H7, the two-side valve indicator lamp H10, the diaphragm valve indicator lamp H11, the main water pump indicator lamp H12 and the air inlet valve indicator lamp H15 are all connected with the positive electrode end of the 24V direct current power supply;
the other end of the water delivery valve indicator lamp H0 is connected in parallel with the output end Y0; the other end of the detection valve indicator lamp H1 is connected in parallel with the output end Y1; the other end of the dosing valve indicator lamp H2 is connected in parallel with the output end Y2; the other end of the outlet valve indicator lamp H3 is connected in parallel with the output end Y3; the other end of the inlet valve indicator lamp H5 is connected in parallel with the output end Y5; the other end of the flushing valve indicator lamp H6 is connected in parallel with the output end Y6; the other end of the exhaust valve indicator lamp H7 is connected in parallel with the output end Y7; the other end of the valve indicator lamp H10 on the two sides is connected in parallel with the output end Y10; the other end of the diaphragm valve indicator lamp H11 is connected in parallel with the output end Y11; the other end of the main water pump indicator lamp H12 is connected in parallel with the output end Y12; the other end of the air inlet valve indicator lamp H15 is connected in parallel with the output end Y15.
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| CN201710160276.XA CN106814686B (en) | 2017-03-17 | 2017-03-17 | Intelligent backwashing control device |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204619487U (en) * | 2015-04-29 | 2015-09-09 | 中山龙净过滤设备有限公司 | A kind of Novel backwashing filter |
| WO2016110195A1 (en) * | 2015-01-09 | 2016-07-14 | 杜成平 | Intelligent car door opening-and-closing apparatus |
| CN206671861U (en) * | 2017-03-17 | 2017-11-24 | 中山龙净过滤设备有限公司 | A kind of control device intelligently backwashed |
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2017
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016110195A1 (en) * | 2015-01-09 | 2016-07-14 | 杜成平 | Intelligent car door opening-and-closing apparatus |
| CN204619487U (en) * | 2015-04-29 | 2015-09-09 | 中山龙净过滤设备有限公司 | A kind of Novel backwashing filter |
| CN206671861U (en) * | 2017-03-17 | 2017-11-24 | 中山龙净过滤设备有限公司 | A kind of control device intelligently backwashed |
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