CN112880767B - Anti-overflow electrical system for liquid filtering tank - Google Patents
Anti-overflow electrical system for liquid filtering tank Download PDFInfo
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- CN112880767B CN112880767B CN202110032239.7A CN202110032239A CN112880767B CN 112880767 B CN112880767 B CN 112880767B CN 202110032239 A CN202110032239 A CN 202110032239A CN 112880767 B CN112880767 B CN 112880767B
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- 239000007788 liquid Substances 0.000 title claims abstract description 77
- 238000001914 filtration Methods 0.000 title claims abstract description 28
- 238000005086 pumping Methods 0.000 claims abstract description 24
- 239000000706 filtrate Substances 0.000 claims abstract description 20
- 238000006243 chemical reaction Methods 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 59
- 239000003990 capacitor Substances 0.000 claims description 20
- 239000003381 stabilizer Substances 0.000 claims description 13
- 230000003287 optical effect Effects 0.000 claims description 11
- 238000007654 immersion Methods 0.000 claims description 9
- 239000004973 liquid crystal related substance Substances 0.000 claims description 9
- 230000000087 stabilizing effect Effects 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 5
- 239000013078 crystal Substances 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims 3
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000010354 integration Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 229930040373 Paraformaldehyde Natural products 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- -1 polyoxymethylene Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
- G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Fluid Mechanics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The invention discloses an anti-overflow electrical system for a liquid filtering tank, which comprises a liquid filtering tank and an overflow pipe, and comprises a central control chip, an AD conversion module, an alarm module, a display module and an intelligent control circuit module, wherein the liquid filtering tank and the overflow pipe are respectively provided with an acquisition module, the signal output end of the acquisition module is connected with the signal input end of the central control chip through the AD conversion module, the signal output end of the central control chip is connected with the signal input end of the display module, the signal output end of the central control chip is further connected with the signal input end of the alarm module, one end of a liquid pumping module is arranged in the liquid filtering tank, and the signal output end of the alarm module is connected with the signal input end of the liquid pumping module through the intelligent control circuit module. The scheme has extremely high sensitivity, higher automation degree, lower device cost, no need of manual operation, larger economic benefit, also ensures the safety of personnel to a certain extent, protects the environment and prevents pollution caused by overflow of filtrate.
Description
Technical Field
The invention belongs to the technical field of overflow prevention of a liquid filtering tank, and particularly relates to an overflow prevention electric system for the liquid filtering tank.
Background
The current signal output by the water level sensor is used as a liquid level detection device at present, on one hand, the liquid level signal is used for displaying the liquid level of an operation picture of an upper computer, on the other hand, the starting and stopping of the motor of the filtrate tank are controlled as a control signal, when the liquid level reaches 60%, the motor is started, the water pump works to convey filtrate to secondary flotation for reprocessing, and when the liquid level is lower than 30%, the motor is stopped, and meanwhile, the water pump also stops working.
In the use process of the water level sensor, the liquid level detection is distorted due to the erosion of water mist and coal dust in the tank, and the distorted signal cannot represent the real state of the liquid level in the tank, so when the situation that the liquid level in the tank reaches the highest real state, the water level sensor still displays the signal of outputting low liquid level, the water pump cannot be started normally, the filtrate flows out from the overflow pipeline, and the production safety of the first floor and the ground environmental sanitation are seriously affected if the filtrate is found to be out untimely.
The prior art is to manually and periodically check the distortion condition of the water level sensor, and the prior art has no timeliness, and most of the distortion of the water level sensor causes the influence caused by water inflow in the overflow pipe, and can not be found and solved at the first time of the distortion of the water level sensor. Or research and development of some robots for inspection, but the robot has high cost and does not have economic benefit.
Disclosure of Invention
The invention aims to provide an anti-overflow monitoring system for a liquid filtering tank, which has the advantages of high sensitivity and accuracy and low cost.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: including filtrate pond and overflow pipe, including well accuse chip, AD conversion module, alarm module, display module and intelligent control circuit module, all be provided with collection module in filtrate pond and the overflow pipe, collection module's signal output part is connected with well accuse chip's signal input part through AD conversion module, well accuse chip's signal output part is connected with display module's signal input part, well accuse chip's signal output part is connected with alarm module's signal input part in addition, the one end setting of drawing liquid module is in the filtrate pond, alarm module's signal output part is connected with the signal input part of drawing liquid module through intelligent control circuit module.
According to the anti-overflow electric system for the liquid filtering pool, the central control chip is an AT89C52 singlechip, and a reset circuit is arranged on the periphery of the AT89C52 singlechip and connected with the crystal oscillator circuit; the collecting module consists of a water level sensor and a water immersion sensor, the water level sensor is fixedly arranged in the middle of the inner wall of the filtrate tank, the detection end of the water level sensor stretches into the filtrate tank, and the water immersion sensor is fixedly arranged at the inlet end of the overflow pipe; the signal output end of the water level sensor is connected with the signal input end of the central control chip through the conversion module, and the signal output end of the water logging sensor is connected with the signal input end of the central control chip through the voltage reduction and stabilizing circuit.
According to the anti-overflow electrical system for the liquid filtering tank, the AD conversion module is an AD converter, the model of the AD converter is ADC0809, and the signal output end of the water level sensor is connected with the input pin of the central control chip through the ADC 0809.
According to the anti-overflow electrical system for the liquid filtering tank, the voltage reduction and stabilizing circuit is composed of a three-terminal voltage stabilizer, a plurality of unidirectional diodes used for voltage reduction, an input filter capacitor and an output filter capacitor, the unidirectional diodes are sequentially connected in series, the cathodes of two adjacent unidirectional diodes are sequentially connected in series, one point potential of the water logging sensor is connected with the positive electrode of the first unidirectional diode through one point potential of the input filter capacitor, the negative electrode of the tail unidirectional diode is connected with the input pin of the three-terminal voltage stabilizer, the ground of the three-terminal voltage stabilizer is grounded, the output pin of the three-terminal voltage stabilizer is connected with the input pin of the central control chip through one point potential of the output filter capacitor, and the other point potential of the water logging sensor is connected with the input pin of the central control chip through the other point potential of the input filter capacitor and the other point potential of the output filter capacitor.
The technical scheme provides an anti-overflow electrical system for a liquid filtering tank, the alarm module is an audible alarm circuit and an optical alarm circuit, the signal input end of the audible alarm circuit is connected with the signal output pin of the central control chip, the optical alarm circuit is connected with the signal output pin of the central control chip, and the signal output end of the optical alarm circuit is connected with the signal input end of the liquid pumping module through the intelligent control circuit module.
The utility model provides an anti-overflow electrical system for fluid filtering pond, audible alarm circuit comprises a first definite value resistance, a triode, a buzzer and first power, and the output pin of well accuse chip is connected with buzzer's signal input part through first definite value resistance and triode, and buzzer's signal output part ground connection, and the triode meets with first power in addition.
The technical scheme provides an anti-overflow electrical system for a liquid filtering tank, wherein the optical alarm circuit comprises an infrared light emitting diode, a second constant value resistor and a second power supply, the negative electrode of the infrared light emitting diode is connected with the output pin of the central control chip, the positive electrode of the infrared light emitting diode is connected with the second power supply through the second constant value resistor, and the signal output end of the infrared light emitting diode is connected with the signal input end of the liquid pumping module through the intelligent control circuit module.
According to the anti-overflow electric system for the liquid filtering tank, the intelligent control circuit module is composed of a photoelectric coupler and an opaque closed shell, the infrared light emitting diode and the photoelectric coupler are arranged in the closed shell, and the photoelectric coupler is arranged in a circuit of the liquid pumping module.
According to the anti-overflow electric system for the liquid filtering pool, the liquid pumping module is composed of a liquid pumping pump and a third power supply, and the power supply output end of the third power supply is connected with the motor power supply input end of the liquid pumping pump through the photoelectric coupler.
According to the anti-overflow electric system for the liquid filtering pool, the display module is a liquid crystal display screen, and the signal input pins of the liquid crystal display screen are connected with the signal output pins of the central control chip.
By adopting the technical scheme, when the water level sensor works normally, the liquid level in the liquid filtering tank is ensured by setting the preset threshold value and the water level sensor for the singlechip, after the water level sensor is distorted, water enters the overflow pipe of the overflow tank, the water immersion sensor can start the liquid pumping pump to pump liquid through the singlechip and the light alarm circuit, and the scheme has extremely high sensitivity, higher automation degree, high accuracy and no misoperation, extremely high efficiency, high integration, small volume, strong reliability, strong control force, low power consumption, low voltage, lower device cost, no manual operation, larger economic benefit, also certain degree of safety of personnel, environmental protection and sanitation protection, and pollution caused by overflow of filtrate.
The invention will be described in more detail below with reference to the drawings and examples.
Drawings
The contents and the marks in the drawings expressed in the drawings of the present specification are briefly described as follows:
FIG. 1 is a schematic flow diagram of a module of the present invention;
FIG. 2 is a schematic diagram of a voltage stabilizing and reducing circuit according to the present invention;
FIG. 3 is a schematic diagram of an alarm module circuit of the present invention;
FIG. 4 is a schematic flow chart of the intelligent control circuit module according to the present invention;
FIG. 5 is a schematic diagram of a system control embodiment of the present invention;
marked in the figure as: 1. a water immersion sensor; 2. inputting a filter capacitor; 3. a unidirectional diode; 4. a three-terminal voltage regulator; 5. an output filter capacitor; 6. a first constant value resistor; 7. a triode; 8. a first power supply; 9. a buzzer; 10. an infrared light emitting diode; 11. a second constant value resistor; 12. a second power supply; 13. AT89C52 singlechip.
Detailed Description
The following detailed description of the embodiments of the present invention, such as the shape and construction of the components, the mutual positions and connection relationships between the components, the roles and working principles of the components, the manufacturing process and the operation and use method, etc., will be given by way of example only to assist those skilled in the art in a more complete, accurate and thorough understanding of the present invention.
Examples:
an anti-overflow electrical system for a liquid filtering pond shown in fig. 1 comprises a liquid filtering pond and an overflow pipe, and comprises a central control chip, an AD conversion module, an alarm module, a display module and an intelligent control circuit module, wherein the liquid filtering pond and the overflow pipe are respectively provided with a collecting module, a signal output end of the collecting module is connected with a signal input end of the central control chip through the AD conversion module, a signal output end of the central control chip is connected with a signal input end of the display module, a signal output end of the central control chip is further connected with a signal input end of the alarm module, one end of a liquid pumping module is arranged in the liquid filtering pond, and a signal output end of the alarm module is connected with a signal input end of the liquid pumping module through the intelligent control circuit module.
The central control chip is an AT89C52 single-chip microcomputer 13, the AT89C52 single-chip microcomputer 13 is fixedly arranged on the filtrate Chi Waibi, and a reset circuit and a crystal oscillator circuit are arranged on the periphery of the AT89C52 single-chip microcomputer 13 and connected; the acquisition module consists of a water level sensor and a water immersion sensor 1, wherein the water level sensor is fixedly arranged in the middle of the inner wall of the filtrate tank, the detection end of the water level sensor stretches into the filtrate tank, and the water immersion sensor 1 is fixedly arranged at the inlet end of the overflow pipe; the signal output end of the water level sensor is connected with the signal input end of the central control chip through a conversion module, and the signal output end of the water logging sensor 1 is connected with the signal input end of the central control chip through a voltage reduction and stabilizing circuit.
AT89C52 is a low voltage and has high performance CMOS singlechip, but the singlechip contains Flash read only program memory and the random access data memory of erasable repeatedly, and singlechip embeds general 8 bit central processing unit and Flash memory cell, and AT89C52 singlechip has extensive application in the electronic trade. The AT89C52 is provided with 40 pins, 32 external bidirectional input/output ports, 2 external interrupt ports, 3 16-bit programmable timing counters, 2 full-duplex serial communication ports, 2 read-write port lines, and the AT89C52 can be programmed according to a conventional method or on-line programming. The general microprocessor and the Flash memory are combined together, and particularly the Flash memory which can be repeatedly erased and written can effectively reduce the development cost.
The height of the filtrate tank is five meters, the preset value of the liquid level height set by the AT89C52 singlechip 13 is forty percent of the height of the filtrate tank, namely, when the liquid level height is two meters, and the threshold value can be adjusted according to the situation.
The AD conversion module is an AD converter, the model of the AD converter is ADC0809, and the signal output end of the water level sensor is connected with the input pin of the central control chip through the ADC 0809.
The voltage-reducing and stabilizing circuit shown in fig. 2 is composed of a three-terminal voltage stabilizer 4, a plurality of unidirectional diodes 3 for voltage reduction, an input filter capacitor 2 and an output filter capacitor 5, wherein the unidirectional diodes 3 are sequentially connected in series, the cathodes of the two adjacent unidirectional diodes 3 are sequentially connected in series, one point potential of the water sensor 1 is connected with the anode of the head unidirectional diode 3 through one point potential of the input filter capacitor 2, the cathodes of the tail unidirectional diode are connected with the input pin of the three-terminal voltage stabilizer 4, the ground of the three-terminal voltage stabilizer 4 is grounded, the output pin of the three-terminal voltage stabilizer 4 is connected with the input pin of the central control chip through one point potential of the output filter capacitor 5, and the other point potential of the water sensor 1 is connected with the input pin of the central control chip through the other point potential of the input filter capacitor 2 and the other point potential of the output filter capacitor 5. The singlechip acquires 5V electric signals, so that voltage reduction is needed, voltage stabilization is carried out in the voltage reduction process, 5 unidirectional diodes are selected to be sequentially connected in series, 12V voltage is reduced to 5V, each diode can reduce 1.4V voltage, and a chip of the three-terminal voltage stabilizer is LM7805.
The alarm module shown in fig. 3 is an acoustic alarm circuit and an optical alarm circuit, wherein the signal input end of the acoustic alarm circuit is connected with the signal output pin of the central control chip, the optical alarm circuit is further connected with the signal output pin of the central control chip, and the signal output end of the optical alarm circuit is connected with the signal input end of the liquid pumping module through the intelligent control circuit module.
The audible alarm circuit consists of a first constant value resistor 6, a triode 7, a buzzer 9 and a first power supply 8, wherein an output pin of the central control chip is connected with a signal input end of the buzzer 9 through the first constant value resistor 6 and the triode 7, a signal output end of the buzzer 9 is grounded, and the triode 7 is connected with the first power supply 8.
The light alarm circuit is composed of an infrared light emitting diode 10, a second constant value resistor 11 and a second power supply 12, wherein the negative electrode of the infrared light emitting diode 10 is connected with an output pin of the central control chip, the positive electrode of the infrared light emitting diode 10 is connected with the second power supply 12 through the second constant value resistor 11, and the signal output end of the infrared light emitting diode 10 is connected with the signal input end of the liquid pumping module through the intelligent control circuit module.
The intelligent control circuit module consists of a photoelectric coupler and an opaque closed shell, wherein the infrared light emitting diode 10 and the photoelectric coupler are arranged in the closed shell, and the photoelectric coupler is arranged in a circuit of the liquid pumping module. The material of the airtight shell is selected from polyoxymethylene materials.
The liquid drawing module shown in fig. 4 is composed of a liquid drawing pump and a third power supply, wherein the power output end of the third power supply is connected with the power input end of a motor of the liquid drawing pump through a photoelectric coupler.
The display module is a liquid crystal display, and a signal input pin of the liquid crystal display is connected with a signal output pin of the central control chip. The liquid crystal display screen adopts 1602 liquid crystal display modules.
When the system control flow chart shown in fig. 5 is used, an analog signal is converted into a digital signal through a water level sensor in a filtering liquid pool and enters a singlechip through an ADC0809, the liquid level is displayed on a liquid crystal display, when the liquid level is higher than two meters, a buzzer 9 in an acoustic alarm circuit starts to give out an alarm sound prompt, an infrared light-emitting diode 10 in an optical alarm circuit can be lightened, and a photoelectric coupler with the infrared light-emitting diode is coupled at the moment, and a circuit of a liquid pumping pump is conducted to start liquid pumping; when the water level sensor is distorted, the liquid level is too high, but the water level sensor cannot collect signals and transmit the signals into the singlechip, at the moment, when steel in the overflow pipe is fed with water, the signals collected by the water logging sensor 1 are transmitted into the singlechip through the voltage stabilizing and reducing circuit, the buzzer 9 in the sound alarm circuit starts to give out alarm sound prompts, at the moment, the water level sensor needs to be maintained, the infrared light emitting diode 10 in the light alarm circuit can lighten, the photoelectric coupler is coupled with the water level sensor, the circuit of the liquid pumping pump is conducted, liquid pumping is started, and the scheme can avoid leakage of filtrate in the liquid filtering tank as much as possible.
By adopting the technical scheme, when the water level sensor works normally, the liquid level in the liquid filtering tank is ensured by setting the preset threshold value and the water level sensor for the singlechip, after the water level sensor is distorted, water enters the overflow pipe of the overflow tank, the water immersion sensor can start the liquid pumping pump to pump liquid through the singlechip and the light alarm circuit, and the scheme has extremely high sensitivity, higher automation degree, high accuracy and no misoperation, extremely high efficiency, high integration, small volume, strong reliability, strong control force, low power consumption, low voltage, lower device cost, no manual operation, larger economic benefit, also certain degree of safety of personnel, environmental protection and sanitation protection, and pollution caused by overflow of filtrate.
While the invention has been described above with reference to the accompanying drawings, it will be apparent that the invention is not limited to the above embodiments, but is capable of being modified or applied directly to other applications without modification, as long as various insubstantial modifications of the method concept and technical solution of the invention are adopted, all within the scope of the invention.
Claims (1)
1. An anti-overflow electrical system for a fluid reservoir, comprising a fluid reservoir and an overflow tube, characterized in that: the device comprises a central control chip, an AD conversion module, an alarm module, a display module and an intelligent control circuit module, wherein the liquid filtering tank and the overflow pipe are respectively provided with an acquisition module, the signal output end of the acquisition module is connected with the signal input end of the central control chip through the AD conversion module, the signal output end of the central control chip is connected with the signal input end of the display module, the signal output end of the central control chip is further connected with the signal input end of the alarm module, one end of the liquid pumping module is arranged in the liquid filtering tank, and the signal output end of the alarm module is connected with the signal input end of the liquid pumping module through the intelligent control circuit module; the central control chip is an AT89C52 single-chip microcomputer, and a reset circuit and a crystal oscillator circuit are arranged on the periphery of the AT89C52 single-chip microcomputer and connected; the collecting module consists of a water level sensor and a water immersion sensor, the water level sensor is fixedly arranged in the middle of the inner wall of the filtrate tank, the detection end of the water level sensor stretches into the filtrate tank, and the water immersion sensor is fixedly arranged at the inlet end of the overflow pipe; the signal output end of the water level sensor is connected with the signal input end of the central control chip through the conversion module, and the signal output end of the water logging sensor is connected with the signal input end of the central control chip through the voltage reduction and stabilizing circuit; the AD conversion module is an AD converter, the model of the AD converter is ADC0809, and the signal output end of the water level sensor is connected with the input pin of the central control chip through ADC 0809; the step-down voltage stabilizing circuit is composed of a three-terminal voltage stabilizer, a plurality of unidirectional diodes for step-down, an input filter capacitor and an output filter capacitor, wherein the unidirectional diodes are sequentially connected in series, the cathodes of two adjacent unidirectional diodes are sequentially connected in series, one point potential of the water logging sensor is connected with the anode of the head unidirectional diode through one point potential of the input filter capacitor, the cathode of the tail unidirectional diode is connected with an input pin of the three-terminal voltage stabilizer, the ground of the three-terminal voltage stabilizer is grounded, an output pin of the three-terminal voltage stabilizer is connected with an input pin of the central control chip through one point potential of the output filter capacitor, and the other point potential of the water logging sensor is connected with the input pin of the central control chip through the other point potential of the input filter capacitor and the other point potential of the output filter capacitor; the alarm module is an acoustic alarm circuit and an optical alarm circuit, the signal input end of the acoustic alarm circuit is connected with the signal output pin of the central control chip, the optical alarm circuit is further connected with the signal output pin of the central control chip, and the signal output end of the optical alarm circuit is connected with the signal input end of the liquid pumping module through the intelligent control circuit module; the sound alarm circuit consists of a first fixed value resistor, a triode, a buzzer and a first power supply, wherein an output pin of the central control chip is connected with a signal input end of the buzzer through the first fixed value resistor and the triode, a signal output end of the buzzer is grounded, and the triode is connected with the first power supply; the light alarm circuit consists of an infrared light emitting diode, a second constant value resistor and a second power supply, wherein the negative electrode of the infrared light emitting diode is connected with the output pin of the central control chip, the positive electrode of the infrared light emitting diode is connected with the second power supply through the second constant value resistor, and the signal output end of the infrared light emitting diode is connected with the signal input end of the liquid pumping module through the intelligent control circuit module; the intelligent control circuit module consists of a photoelectric coupler and an opaque closed shell, the infrared light emitting diode and the photoelectric coupler are both arranged in the closed shell, and the photoelectric coupler is arranged in a circuit of the liquid pumping module; the liquid extraction module consists of a liquid extraction pump and a third power supply, and the power supply output end of the third power supply is connected with the power supply input end of a motor of the liquid extraction pump through the photoelectric coupler; the display module is a liquid crystal display, and a signal input pin of the liquid crystal display is connected with a signal output pin of the central control chip.
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| CN202110032239.7A CN112880767B (en) | 2021-01-11 | 2021-01-11 | Anti-overflow electrical system for liquid filtering tank |
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| CN202110032239.7A CN112880767B (en) | 2021-01-11 | 2021-01-11 | Anti-overflow electrical system for liquid filtering tank |
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Effective date of registration: 20240506 Address after: 230000 b-1018, Woye Garden commercial office building, 81 Ganquan Road, Shushan District, Hefei City, Anhui Province Patentee after: HEFEI WISDOM DRAGON MACHINERY DESIGN Co.,Ltd. Country or region after: China Address before: 241000 No.8, Beijing Middle Road, Jinghu District, Wuhu City, Anhui Province Patentee before: ANHUI POLYTECHNIC University Country or region before: China |