Trace reagent water quality online monitoring device

Abstract

The present invention provides a trace reagent water quality online monitoring device, including a control box, a measuring detection unit and a measuring reaction unit; the measuring detection unit includes a circulation slot, a liquid inlet switch, a plurality of reagent tanks and a quantitative peristaltic pump, a water collecting slot and a plurality of circulation pipes are arranged inside the circulation slot, and the circulation pipes are interconnected, and the measuring reaction unit includes a measuring pool, and a reaction pool is arranged inside the measuring pool. The detection water circulates in the circulation pipe arranged inside the circulation slot and is transported to the water collecting slot for collection. During the transportation process, the light emitted by the light source can be buffered and eliminated by bubbles and enters the measuring pool, and is emitted to the sensor and the filter port position after passing through the detection water, and the light signal is received by the sensor, and the light intensity value is first extracted without adding the reagent to the detection water, and then the light intensity value is extracted again after adding the reagent, and the actual test value is obtained according to the changes of the two light intensity values.

Description

Technical Field

[0001] The invention relates to the technical field of water quality detection, in particular to a trace reagent water quality online monitoring device. Background Art

[0002] Traditional water quality monitoring methods often have problems such as low monitoring frequency, inaccurate data, and poor timeliness, and cannot meet the needs of modern water quality management. Therefore, trace reagent water quality online monitoring is used to monitor water quality in real time. The water quality online monitoring system is a set of online automatic analysis instruments as the core, using modern sensing technology, automatic measurement technology, automatic control technology, computer application technology, and related special analysis software and communication networks to form a comprehensive online automatic monitoring system. Trace reagent water quality detection generally produces different biochemical effects or chemical colors through the reaction of chemical and biological agents with different substances in the water, and then achieves the purpose of water quality monitoring based on sensor and computer data analysis.

[0003] Most of the existing trace reagent water quality online monitoring devices mainly use the pressure sensor mode to judge the water inlet when transporting the monitoring water to the monitoring system, which may easily lead to low water pressure in the water working environment and make the test difficult. At the same time, different reagents have different biochemical properties, and it is difficult to achieve quantitative transportation during the transportation process, which may easily cause damage to the workpiece, and it is difficult to fill the liquid and clean it. It is necessary to design an online monitoring device for trace reagent water quality to solve the above-mentioned problems. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides an online monitoring device for water quality of trace reagents, which solves the problems of difficulty in quantitative delivery and difficulty in testing when the water pressure is low.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A trace reagent water quality online monitoring device, including a control box, a measurement detection unit and a measurement reaction unit;

[0006] The measurement and detection unit includes a circulation groove, a liquid inlet switch, several reagent tanks and a quantitative peristaltic pump. A water collecting groove and several circulation pipes are arranged inside the circulation groove. The circulation pipes are interconnected. An overflow port is arranged inside the water collecting groove. A water injection port is arranged on one side of the circulation groove. A drainage port is arranged at the bottom end of the water collecting groove.

[0007] The flow slot is connected to the liquid inlet switch, the liquid inlet switch is connected to the measurement reaction unit, the reagent tank is connected to one side of the quantitative peristaltic pump, and the other side of the quantitative peristaltic pump is connected to the measurement reaction unit.

[0008] The measurement reaction unit comprises a collection tank, a measurement pool and a cleaning peristaltic pump. A reaction pool is arranged inside the measurement pool, a stirring motor and an overflow joint are arranged at the bottom of the measurement pool, a sensor and a filter port are arranged on the other side of the measurement pool, a light source is arranged on one side of the measurement pool, and a plurality of water inlets are equidistantly arranged on the upper part of the measurement pool.

[0009] Preferably, the front side of the control box is rotatably connected to a box door, an upper portion of the box door is provided with a transparent window, and an inner side of the water collecting tank is provided with a liquid level sensor.

[0010] A data display control system is fixedly connected to the inner upper end of the control box, and a power supply module is arranged on the upper part of the other side of the control box.

[0011] Preferably, the circulation groove is fixedly connected to an upper part of one side of the control box, the liquid inlet switch and the quantitative peristaltic pump are fixedly connected to the middle part of the inner side of the control box, and the reagent tanks are both arranged on one side of the inner side of the control box.

[0012] The collecting tank is arranged at the other side of the interior of the control box, the measuring cell is fixedly connected to the upper part of the collecting tank, and the cleaning peristaltic pump is fixedly connected to the middle part of the inner side of the control box.

[0013] Preferably, a water inlet pipe is provided on one side of the water injection port, a drain pipe is provided at the bottom of the drain port, an overflow pipe is provided at the bottom of the overflow port, the drain pipe is connected to the input end of the liquid inlet switch, and the output end of the liquid inlet switch is fixedly connected to the input end of the water inlet.

[0014] The circulation conduit includes a first circulation port, a second circulation port and a third circulation port, wherein a first circulation tube is arranged at the rear side of the first circulation port, a second circulation tube is arranged at the front side of the first circulation port, a third circulation tube is arranged at the front side of the second circulation tube, a fourth circulation tube is arranged at the rear side of the second circulation tube, a fifth circulation tube is arranged at the rear side of the third circulation port, and a sixth circulation tube is arranged at the front side of the third circulation port.

[0015] The water injection port is connected to the first flow pipe, the second flow pipe is connected to the third flow pipe by setting a first connecting channel, the fourth flow pipe is connected to the fifth flow pipe by setting a second connecting channel, and the sixth flow pipe is connected to the water collecting tank by setting a third connecting channel.

[0016] Preferably, a control valve is provided on the upper part of the reagent tank, a pressure gauge is provided on the outer side of the control valve, a first connecting pipe is provided on the upper part of the control valve, the output end of the first connecting pipe is connected to the input end of the quantitative peristaltic pump, a plurality of second connecting pipes are provided at the output end of the quantitative peristaltic pump, and the output ends of the second connecting pipes are fixedly connected to the input end of the water inlet.

[0017] Preferably, a mounting base is fixedly connected to the upper end of the collecting tank, the measuring cell is fixedly mounted on the upper part of the mounting base, a sewage outlet is provided at the rear bottom of the collecting tank, and the output ends of the overflow joint, the cleaning peristaltic pump and the measuring cell are all connected to the input end of the collecting tank.

[0018] Preferably, a supporting angle iron is fixedly connected to an upper portion of one side of the control box, and the flow pipe, overflow port and notch edge positions arranged inside the flow slot are all arranged in an angular manner.

[0019] Preferably: the power supply module is electrically connected to the measurement detection unit and the measurement reaction unit respectively, and is used to supply power to the components of the measurement detection unit and the measurement reaction unit;

[0020] The power supply module includes: a filter module and a plurality of step-down modules;

[0021] The filtering module is used to filter the connected alternating current into direct current;

[0022] The step-down module is used to step down the filtered DC power to a suitable voltage for each device, and is mainly used to step down the 24V DC power to 12V, 5V and 3.3V to power each component in the measurement reaction unit.

[0023] Preferably: the circuit for converting 24V voltage to 12V voltage includes:

[0024] The positive electrode of the polarity capacitor C8 is connected to the 24V power supply input terminal, and the negative electrode of the polarity capacitor C8 is grounded; the first end of the capacitor C9 is connected to the positive electrode of the polarity capacitor C8, and the second end of the capacitor C9 is connected to the negative electrode of the polarity capacitor C8 in parallel and grounded; the first end of the capacitor C9 is connected to the VIN pin of the buck chip U1;

[0025] The GND pin and the PD pin of the buck chip U1 are short-circuited at a node;

[0026] The BOOT pin of the buck chip U1 is connected to the first end of the capacitor C7, the second end of the capacitor C7 is connected to the PH pin of the buck chip U1, the second end of the capacitor C7 is also connected to the negative electrode of the voltage regulator diode D2, the positive electrode of the voltage regulator diode D2 is grounded, the negative electrode of the voltage regulator diode D2 is connected to the first end of the inductor L2, the second end of the inductor L2 is connected to the positive electrode of the polar capacitor C11, the negative electrode node of the polar capacitor C11, the positive electrode of the polar capacitor C11 is also connected to the first end of the capacitor C12 and the capacitor C13; the second ends of the capacitor C12 and the capacitor C13 are both grounded; the first end of the capacitor C13 is also connected to the 12V voltage output end, and is also connected to the first end of the resistor R71, the second end of the resistor R71 is connected to the positive electrode of the light-emitting diode D16, and the second end of the light-emitting diode D16 is grounded;

[0027] The second end of the inductor L2 is also connected to the first end of the resistor R1, the second end of the resistor R1 is connected to the VSNS pin of the buck chip U1, the second end of the resistor R1 is also connected to the first end of the resistor R2, and the second end of the resistor R2 is grounded;

[0028] The ENA pin and the NC pin of the buck chip U1 are both unconnected.

[0029] Preferably: the external controller communicates and controls with the data display control system via a 485 communication module;

[0030] And the data display control system communicates with the liquid level sensor in the measurement and detection unit through a 485 communication module.

[0031] Preferably: the 485 communication module includes: an optocoupler isolation circuit, a chip isolation circuit and an RS485 transceiver circuit;

[0032] The optical coupling isolation circuit comprises:

[0033] The first end of the resistor R165 is connected to the USART enable signal terminal, the second end of the resistor R165 is connected to the first end of the resistor R166, the second end of the resistor R166 is grounded, and the first end of the resistor R166 is also connected to the base of the transistor Q12, the emitter of the transistor Q12 is connected to the second end of the resistor R166, the collector of the transistor Q12 is connected to the second end of the resistor R163, the first end of the resistor R163 is connected to the negative electrode of the light source of the photoelectric coupler U11, and the positive electrode of the light source of the photoelectric coupler U11 is connected to 3. 3V voltage source, the emitter of the photocoupler U11 light receiver is grounded, the collector of the photocoupler U11 light receiver is connected to the second end of the resistor R83, the first end of the resistor R83 is connected to the 5V voltage source, the first end of the resistor R83 is also connected to the first end of the resistor R82, the second end of the resistor R82 is connected to the 485 enable signal terminal, the second end of the resistor R82 is also connected to the collector of the transistor Q11, the emitter of the transistor Q11 is grounded, and the base of the transistor Q11 is connected to the second end of the resistor R83;

[0034] The chip isolation circuit includes: a first end of a resistor R162 is connected to a USART data receiving end, a second end of the resistor R162 is connected to a second end of a resistor R84, a first end of the resistor R84 is connected to a 3.3V voltage source, a first end of the resistor R84 is also connected to a first end of a resistor R161, a second end of the resistor R161 is connected to a second end of the resistor R164, a first end of the resistor R164 is connected to a USART data sending end, and a second end of the resistor R164 is also connected to a V IB pin is connected, the second end of the resistor R162 is also connected to the VOA pin of the isolation chip U19; the VDD1 end of the isolation chip U19 is connected to a 3.3V voltage source, the GND1 pin of the isolation chip U19 is grounded, the VDD2 pin of the isolation chip U19 is connected to a 5V voltage source, the VIA pin of the isolation chip U19 is connected to a 485 data receiving end, the VOB pin of the isolation information U19 is connected to a 485 data sending end, and the GND2 pin of the isolation chip U19 is grounded;

[0035] The RS485 transceiver circuit includes: the R pin of the 485 transceiver chip U20 is connected to the 485 data receiving end, the RE pin and the DE pin of the 485 transceiver chip U20 are short-circuited and connected to the 485 communication enabling end, and the D pin of the 485 transceiver chip U20 is connected to the 485 data sending end; the second end of the resistor R167 is connected to the R pin of the 485 transceiver chip U20, the first end of the resistor R167 is connected to the 5V voltage source, the first end of the resistor R167 is also connected to the first end of the resistor R168, and the second end of the resistor R168 is connected to the D pin of the 485 transceiver chip U20; the VCC pin of the 485 transceiver chip is connected to the 5V voltage source, the first ends of the capacitors C106 and C104 are both connected to the VCC pin of the 485 transceiver chip, and the capacitors C106 and C104 are connected to the VCC pin of the 485 transceiver chip. The second end of the resistor R86 is connected in parallel to the ground; the B pin of the 485 transceiver chip is connected to the first end of the resistor R87, the second end of the resistor R87 is connected to the second end of the resistor R86, and the first end of the resistor R86 is grounded; the second end of the resistor R87 is also connected to the M485-B terminal through the fuse F1; the A pin of the 485 transceiver chip U20 is connected to the first end of the resistor R90, the second end of the resistor R90 is connected to the first end of the resistor R91, the second end of the resistor R91 is grounded, and the second end of the resistor R90 is also connected to the M485-A terminal through the fuse F2; the IO1 pin of the electrostatic protection diode U12 is connected to the second end of the resistor R87, the IO2 pin of the electrostatic protection diode U12 is connected to the second end of the resistor R90, and the GND pin of the electrostatic protection diode is grounded; the GND pin of the 485 transceiver chip U20 is grounded.

[0036] The present invention provides a trace reagent water quality online monitoring device. It has the following beneficial effects:

[0037] 1. The present invention can quantitatively deliver the test water to the measuring unit position through the flow slot structure design and the liquid inlet switch. At the same time, the flow slot can defoam the test water to prevent the influence of bubbles on the measurement data. The flow slot is installed at a certain height to adopt gravity transportation, which will not cause the water pressure to be too low and unable to be transported.

[0038] 2. The present invention uses a liquid inlet switch, a quantitative peristaltic pump and a cleaning peristaltic pump to make the overall liquid inlet, cleaning, reaction and control processes relatively simple and fast, and the overall coordinated use is more stable. The detection water and reagents can be fully mixed in the reaction tank through the stirring motor, and the measuring tank is flushed through the cleaning peristaltic pump, and the flushing wastewater is discharged into the collection tank for collection.

[0039] 3. The data display control system communicates with the liquid level sensor in the measurement and detection unit through a 485 communication module, and RS485 signal isolation is achieved through an optical coupler and a dedicated serial port isolation chip to prevent damage to the back-end hardware caused by interference on the external RS485 signal.

[0040] 4. The step-down module is used to step down the filtered DC power to a suitable voltage for each device, and the overall circuit design has low line loss. It is mainly used to step down the 24V DC power to power each component in each measurement reaction unit. It has strong compatibility, can provide stable power supply, reduce failures caused by voltage fluctuations, and ensure stable operation and efficient work of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic diagram of the front three-dimensional structure of the present invention;

[0042] Figure 2 It is a schematic diagram of the internal structure of the control box of the present invention;

[0043] Figure 3 This is a front view of the internal structure of the control box of the present invention;

[0044] Figure 4 It is a schematic diagram of the rear three-dimensional structure of the present invention;

[0045] Figure 5 A top view of the three-dimensional structure of the flow channel of the present invention;

[0046] Figure 6 It is a schematic diagram of the three-dimensional structure of the reagent tank of the present invention;

[0047] Figure 7 It is a schematic diagram of the three-dimensional structure of one side of the measuring cell of the present invention;

[0048] Figure 8 It is a schematic diagram of the three-dimensional structure of the collection tank of the present invention;

[0049] Fig. 9 It is a schematic diagram of the three-dimensional structure of the other side of the measuring tank of the present invention;

[0050] Fig.10 It is a three-dimensional structural diagram of the flow channel of the present invention;

[0051] Fig.11 A partial cross-sectional view of the flow channel of the present invention;

[0052] Fig.12 A partial cross-sectional view of the flow channel of the present invention;

[0053] Fig.13 A circuit diagram of a power module of the present invention;

[0054] Fig.14This is a diagram of an optocoupler isolation circuit in the present invention;

[0055] Fig.15 This is a chip isolation circuit diagram of the present invention;

[0056] Fig.16 This is the 485 transceiver circuit diagram of the present invention.

[0057] Among them, 1. control box; 101. box door; 102. transparent window; 2. measurement and detection unit; 201. circulation slot; 202. liquid inlet switch; 203. reagent tank; 204. quantitative peristaltic pump; 205. water collection tank; 206. circulation pipeline; 2062. first circulation port; 2011. first circulation pipe; 2012. second circulation pipe; 2063. second circulation port; 3011. third circulation pipe; 3012. fourth circulation pipe; 2064. third circulation port; 4011. fifth circulation pipe; 4012. sixth circulation pipe; 207. drain port; 208. overflow port; 209. water inlet pipe; 210. overflow pipe; 211. 1. Drain pipe; 212. Control valve; 213. Pressure gauge; 214. First connecting pipe; 215. Second connecting pipe; 216. Liquid level sensor; 217. Water inlet; 218. First connecting channel; 219. Second connecting channel; 220. Third connecting channel; 3. Measurement reaction unit; 301. Collection tank; 302. Measuring pool; 303. Cleaning peristaltic pump; 304. Mounting seat; 305. Drain port; 306. Stirring motor; 307. Overflow joint; 308. Reaction pool; 309. Filter port; 310. Light source; 311. Water inlet; 4. Data display control system; 5. Power module; 6. Support angle iron. DETAILED DESCRIPTION

[0058] The following will be combined with the embodiments of the present invention Figure 1-Figure 16 , the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] Embodiment 1

[0060] See also Figure 1-Figure 9The embodiment of the present invention provides an online monitoring device for trace reagent water quality, including a control box 1, a measuring detection unit 2 and a measuring reaction unit 3; the measuring detection unit 2 includes a circulation slot 201, a liquid inlet switch 202, a plurality of reagent tanks 203 and a quantitative peristaltic pump 204, a water injection port 217 is arranged on one side of the circulation slot 201, a water collecting slot 205 and a plurality of circulation pipes 206 are arranged inside the circulation slot 201, and the circulation pipes 206 are interconnected, an overflow port 208 is arranged inside the water collecting slot 205, and a drain port 207 is arranged at the bottom of the water collecting slot 205 ... The reaction unit 3 includes a collection tank 301, a measuring pool 302 and a cleaning peristaltic pump 303. The cleaning peristaltic pump 303 can adopt an existing speed-regulating intelligent peristaltic pump. A reaction pool 308 is arranged inside the measuring pool 302. A stirring motor 306 and an overflow joint 307 are arranged at the bottom of the measuring pool 302. A sensor and a filter port 309 are arranged on the other side of the measuring pool 302. The sensor and the filter port 309 are adjacent to each other. The sensor adopts an existing photoelectric sensor. A light source 310 is arranged on one side of the measuring pool 302. A plurality of water inlets 311 are equidistantly arranged on the upper part of the measuring pool 302.

[0061] See also Figure 1-Figure 4 The front side of the control box 1 is rotatably connected with a box door 101, and a transparent window 102 is arranged on the upper part of the box door 101. A liquid level sensor 216 is arranged on the inner side of the water collecting tank 205. The box door 101 and the transparent window 102 facilitate real-time observation of the data display control system 4. A power module 5 is arranged on the upper part of the other side of the control box 1. The data display control system 4 facilitates the control of the detection water in and out of the circulation tank 201, as well as the control of the liquid inlet switch 202, a plurality of reagent tanks 203, a quantitative peristaltic pump 204 and a cleaning peristaltic pump 303.

[0062] See also Figure 1-Figure 4 The flow slot 201 is fixedly connected to the upper part of one side of the control box 1. The upper part of one side of the control box 1 is fixedly connected with a support angle iron 6. The support angle iron 6 facilitates the installation and fixation of the flow slot 201, and supports the flow slot 201 at the same time, increasing the stability of the flow slot 201 during operation. The liquid inlet switch 202 and the quantitative peristaltic pump 204 are fixedly connected to the middle of the inner side of the control box 1. The reagent tank 203 is arranged on one side of the inner side of the control box 1, which is convenient for installation and fixation, and also for arranging the wiring inside the control box 1 to avoid cross-interference of the pipes.

[0063] See also Figure 1-Figure 4 The collecting tank 301 is arranged on the other side of the control box 1, the measuring pool 302 is fixedly connected to the upper part of the collecting tank 301, and the cleaning peristaltic pump 303 is fixedly connected to the middle part of the inner side of the control box 1, which is convenient for installation and fixing, and also convenient for wiring inside the control box 1 to avoid cross-interference of pipes.

[0064] See also Figure 3-Figure 6 , the upper part of the reagent tank 203 is provided with a control valve 212, the outer side of the control valve 212 is provided with a pressure gauge 213, the upper part of the control valve 212 is provided with a first connecting pipe 214, the output end of the first connecting pipe 214 is connected to the input end of the quantitative peristaltic pump 204, the output end of the quantitative peristaltic pump 204 is provided with a plurality of second connecting pipes 215, the output end of the second connecting pipe 215 is fixedly connected to the input end of the water inlet 311, the control valve 212 and the pressure gauge 213 are used to facilitate the output of the reagent into the reagent tank 203, and the air pressure inside the reagent tank 203 is monitored at the same time, the output reagent is quantitatively transported to the inside of the measuring pool 302 in the quantitative peristaltic pump 204, the quantitative peristaltic pump 204 is an existing multi-roller precision control peristaltic pump, but it is innovative to be applied in the present technical solution, and can realize individual control and multi-channel control of reagent input, each reagent pipeline is separately connected to the liquid surface of the measuring pool 302 to avoid cross contamination of the reagent, and the reagent enters the reagent tube due to diffusion.

[0065] See also Figure 7-Figure 9 The upper end of the collecting tank 301 is fixedly connected with a mounting base 304, and the measuring pool 302 is fixedly mounted on the upper part of the mounting base 304. A sewage outlet 305 is arranged at the rear bottom of the collecting tank 301. The overflow joint 307, the cleaning peristaltic pump 303 and the output end of the measuring pool 302 are all connected with the input end of the collecting tank 301. The mounting base 304 facilitates the installation and fixation of the measuring pool 302, and the cleaning peristaltic pump 303 facilitates the flushing of the inside of the measuring pool 302. The collecting tank 301 facilitates the overall collection and discharge of sewage, thereby increasing convenience.

[0066] First, the test water is transported to the inside of the circulation tank 201 through the water inlet pipe 209, the test water circulates in the circulation pipe arranged inside the circulation tank 201, and is transported to the water collecting tank 205 for collection. During the transportation process, the bubbles can be buffered and reduced, and the test water is stored. The overflowed test water is discharged through the overflow port 208 and the overflow pipe 210, and then the test water is transported to the inside of the liquid inlet switch 202 through the drain pipe 211, and the test water is quantitatively transported to the reaction tank in the measuring tank 302 through the liquid inlet switch 202. Secondly, different biochemical reagents are transported to the inside of the quantitative peristaltic pump 204 through the reagent tank through the first connecting pipe 214, and the biochemical reagents are quantitatively transported to the measuring tank 30 respectively through the quantitative peristaltic pump 204. 2, the test water and the reagent are further mixed in the reaction pool 308 by the stirring motor 306, and the overflowed reagent and test water are transported to the inside of the collection tank 301 through the overflow joint, and the light emitted by the light source enters the measuring pool 302, and is emitted to the position of the sensor and the filter port 309 after passing through the test water, and the light signal is received by the sensor. In the case where no reagent is added to the test water, the light intensity value is extracted first, and then the light intensity value is extracted again after the reagent is added. The actual test value is obtained according to the changes of the two light intensity values ​​and the test curve. Extracting the light intensity value is a routine operation, and finally the measuring pool 302 is flushed by the cleaning peristaltic pump, and the flushed sewage is discharged into the collection tank for collection.

[0067] Embodiment 2

[0068] See also Figure 3-Figure 12 In this embodiment, the flow pipe 206, the overflow port 208 and the edge of the groove 201 are all arranged with an angular shape. A water inlet pipe 209 is arranged on one side of the water injection port 217. A drain pipe 211 is arranged at the bottom of the drain port. An overflow pipe 210 is arranged at the bottom of the overflow port 208. The drain pipe 211 is connected to the input end of the liquid inlet switch 202. The output end of the liquid inlet switch 202 is fixedly connected to the input end of the water inlet. The flow pipe 206 includes a first flow port 2062, a second flow port 2063 and a third flow port 2064. A second flow port 2063 and a third flow port 2064, a first flow pipe 2011 is disposed at the rear side of the first flow port 2062, a second flow pipe 2012 is disposed at the front side of the first flow port 2062, a third flow pipe 3011 is disposed at the front side of the second flow pipe 2012, a fourth flow pipe 3012 is disposed at the rear side of the second flow pipe 2012, a fifth flow pipe 4011 is disposed at the rear side of the third flow port 2064, and a sixth flow pipe 4012 is disposed at the front side of the third flow port 2064;

[0069] The water injection port 217 is connected to the first circulation pipe 2011, the second circulation pipe 2012 is connected to the third circulation pipe 3011 by setting a first connecting channel 218, the fourth circulation pipe 3012 is connected to the fifth circulation pipe 4011 by setting a second connecting channel 219, and the sixth circulation pipe 4012 is connected to the water collecting tank by setting a third connecting channel 220.

[0070] The test water is transported to the inside of the circulation groove 201 through the water inlet pipe, and circulates in the interconnected circulation pipes 206, and finally flows into the water collecting tank 205 for collection, and the excess test water overflows and is discharged through the overflow port 208, so that the test water can buffer and eliminate bubbles after multiple circulations, and store the test water to prevent the different light transmittance of the bubbles and the test water, which may easily affect the test values. At the same time, the test water is transported to the inside of the detection unit through the drain port and the drain pipe 211 by gravity, to prevent the test water from being difficult to transport when the water pressure is low in the water working environment.

[0071] At the same time, a plurality of sealing ports are provided on the side of the circulation slot 201, which are sealed when not in use. When the test water input into the circulation slot contains impurities or silt, the impurities or silt can be circulated and retained in the circulation pipe, and the impurities or silt can be cleaned through the sealing ports, and the accumulated test water can be discharged; a plurality of mounting holes are equidistantly provided at the upper edge of the circulation slot 201, which is convenient for the installation of the cover body and dust-proof for the test water inside the circulation slot.

[0072] An overflow pipe is provided on the other side of the water collecting trough to discharge the overflowed test water out of the circulation trough to prevent overflow caused by excessive input of test water. A drain outlet is provided at the bottom of the water collecting trough to discharge the test water collected in the water collecting trough into the detection device for detection. A first sealing port is provided on one side of the circulation trough, and a second sealing port and a third sealing port (not marked in the figure) are provided on the other side of the circulation trough. The first sealing port is connected to the second circulation tube 2012, the second sealing port is connected to the fifth circulation tube 4011, and the third sealing port is connected to the sixth circulation tube 4012. The first sealing port, the second sealing port and the third sealing port are used to discharge the test water accumulated in the first circulation tube 2011, the second circulation tube 2012, the third circulation tube 3011, the fourth circulation tube 3012, the fifth circulation tube 4011 and the sixth circulation tube 4012 out of the circulation trough. A number of mounting holes are equidistantly provided at the upper edge of the circulation trough to facilitate the installation of the cover and to prevent dust from entering the circulation trough. The interior of the flow slot is conveniently positioned with angles. By setting the size of the flow slot, the size after installation can retain appropriate test water at one time to prevent the situation where too much or too little test water is delivered at one time, causing overflow or insufficient test water in the test pool inside the detection device. Bubbles can be eliminated by the angle setting.

[0073] Embodiment 3

[0074] See also Fig.13 , the power supply module is electrically connected to the measurement reaction unit and is used to supply power to various components of the measurement reaction unit;

[0075] The power supply module comprises: a filter module and a plurality of step-down modules;

[0076] The filtering module is used to filter the connected alternating current into direct current;

[0077] In this embodiment, the step-down module is used to step down the filtered DC power to a suitable voltage for each device, and the overall circuit design has low line loss. It is mainly used to step down the 24V DC power to 12V, 5V and 3.3V to power each component in the measurement reaction unit. It has strong compatibility, can provide stable power supply, reduce failures caused by voltage fluctuations, and ensure stable operation and efficient work of the equipment.

[0078] The circuits for converting 24V voltage to 12V voltage include:

[0079] The positive electrode of the polarity capacitor C8 is connected to the 24V power supply input terminal, and the negative electrode of the polarity capacitor C8 is grounded; the first end of the capacitor C9 is connected to the positive electrode of the polarity capacitor C8, and the second end of the capacitor C9 is connected to the negative electrode of the polarity capacitor C8 in parallel and grounded; the first end of the capacitor C9 is connected to the VIN pin of the buck chip U1;

[0080] The GND pin and the PD pin of the buck chip U1 are short-circuited at a node;

[0081] The BOOT pin of the buck chip U1 is connected to the first end of the capacitor C7, the second end of the capacitor C7 is connected to the PH pin of the buck chip U1, the second end of the capacitor C7 is also connected to the negative electrode of the voltage regulator diode D2, the positive electrode of the voltage regulator diode D2 is grounded, the negative electrode of the voltage regulator diode D2 is connected to the first end of the inductor L2, the second end of the inductor L2 is connected to the positive electrode of the polar capacitor C11, the negative electrode node of the polar capacitor C11, the positive electrode of the polar capacitor C11 is also connected to the first end of the capacitor C12 and the capacitor C13; the second ends of the capacitor C12 and the capacitor C13 are both grounded; the first end of the capacitor C13 is also connected to the 12V voltage output end, and at the same time connected to the first end of the resistor R71, the second end of the resistor R71 is connected to the positive electrode of the light-emitting diode D16, and the second end of the light-emitting diode D16 is grounded.

[0082] The second end of the inductor L2 is also connected to the first end of the resistor R1, the second end of the resistor R1 is connected to the VSNS pin of the buck chip U1, the second end of the resistor R1 is also connected to the first end of the resistor R2, and the second end of the resistor R2 is grounded; the ENA pin and the NC pin of the buck chip U1 are both unconnected.

[0083] Embodiment 4

[0084] See also Figure 13-Figure 16 In this embodiment, the liquid level sensor 216 is mainly used to detect the injection amount of test water inside the water collection tank 205 or whether there is test water. When there is no test water, the equipment will stop, and it will restart the measurement when there is test water. After the test water reaches the preset position inside the water collection tank 205, the solenoid valve at the water injection port position can be controlled to close. The external controller communicates and controls with the data display control system through the 485 communication module, which can further realize external controller control and screen operation control, and the data display control system communicates with the liquid level sensor in the measurement and detection unit through the 485 communication module.

[0085] The 485 communication module includes: an optocoupler isolation circuit, a chip isolation circuit and an RS485 transceiver circuit;

[0086] The optical coupling isolation circuit includes: a first end of a resistor R165 is connected to a USART enable signal end, a second end of the resistor R165 is connected to a first end of a resistor R166, a second end of the resistor R166 is grounded, and a first end of the resistor R166 is also connected to a base of a transistor Q12, an emitter of the transistor Q12 is connected to a second end of the resistor R166, a collector of the transistor Q12 is connected to a second end of a resistor R163, a first end of the resistor R163 is connected to a negative electrode of a light source of a photoelectric coupler U11, and a The positive electrode is connected to a 3.3V voltage source, the emitter of the photodetector of the photocoupler U11 is grounded, the collector of the photodetector of the photocoupler U11 is connected to the second end of the resistor R83, the first end of the resistor R83 is connected to a 5V voltage source, the first end of the resistor R83 is also connected to the first end of the resistor R82, the second end of the resistor R82 is connected to the 485 enable signal end, the second end of the resistor R82 is also connected to the collector of the transistor Q11, the emitter of the transistor Q11 is grounded, and the base of the transistor Q11 is connected to the second end of the resistor R83.

[0087] The chip isolation circuit includes: a first end of a resistor R162 is connected to a USART data receiving end, a second end of the resistor R162 is connected to a second end of a resistor R84, a first end of the resistor R84 is connected to a 3.3V voltage source, a first end of the resistor R84 is also connected to a first end of a resistor R161, a second end of the resistor R161 is connected to a second end of the resistor R164, a first end of the resistor R164 is connected to a USART data sending end, and a second end of the resistor R164 is also connected to a V The IB pin is connected, and the second end of the resistor R162 is also connected to the VOA pin of the isolation chip U19; the VDD1 end of the isolation chip U19 is connected to a 3.3V voltage source, the GND1 pin of the isolation chip U19 is grounded, the VDD2 pin of the isolation chip U19 is connected to a 5V voltage source, the VIA pin of the isolation chip U19 is connected to a 485 data receiving end, the VOB pin of the isolation information U19 is connected to a 485 data sending end, and the GND2 pin of the isolation chip U19 is grounded.

[0088] The RS485 transceiver circuit includes: the R pin of the 485 transceiver chip U20 is connected to the 485 data receiving end, the RE pin and the DE pin of the 485 transceiver chip U20 are short-circuited and connected to the 485 communication enabling end, and the D pin of the 485 transceiver chip U20 is connected to the 485 data sending end; the second end of the resistor R167 is connected to the R pin of the 485 transceiver chip U20, the first end of the resistor R167 is connected to the 5V voltage source, the first end of the resistor R167 is also connected to the first end of the resistor R168, and the second end of the resistor R168 is connected to the D pin of the 485 transceiver chip U20; the VCC pin of the 485 transceiver chip is connected to the 5V voltage source, the first ends of the capacitors C106 and C104 are both connected to the VCC pin of the 485 transceiver chip, and the capacitors C106 and C104 are connected to the VCC pin of the 485 transceiver chip. The second end of the resistor R86 is connected in parallel to the ground; the B pin of the 485 transceiver chip is connected to the first end of the resistor R87, the second end of the resistor R87 is connected to the second end of the resistor R86, and the first end of the resistor R86 is grounded; the second end of the resistor R87 is also connected to the M485-B terminal through the fuse F1; the A pin of the 485 transceiver chip U20 is connected to the first end of the resistor R90, the second end of the resistor R90 is connected to the first end of the resistor R91, the second end of the resistor R91 is grounded, and the second end of the resistor R90 is also connected to the M485-A terminal through the fuse F2; the IO1 pin of the electrostatic protection diode U12 is connected to the second end of the resistor R87, the IO2 pin of the electrostatic protection diode U12 is connected to the second end of the resistor R90, and the GND pin of the electrostatic protection diode is grounded; the GND pin of the 485 transceiver chip U20 is grounded.

[0089] By adopting the above solution, RS485 signal isolation is achieved through optical coupling and dedicated serial port isolation chip to prevent the interference of external RS485 signal from causing damage to the back-end hardware part.

[0090] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A trace reagent water quality online monitoring device, comprising a control box (1), characterized in that: It also includes a measurement detection unit (2) and a measurement reaction unit (3); The measuring and detecting unit (2) comprises a circulation slot (201), a liquid inlet switch (202), a plurality of reagent tanks (203) and a quantitative peristaltic pump (204); a water collecting slot (205) and a plurality of circulation pipes (206) are arranged inside the circulation slot (201); the circulation pipes (206) are interconnected; an overflow port (208) is arranged inside the water collecting slot (205); a water injection port (217) is arranged on one side of the circulation slot (201); and a drainage port (207) is arranged at the bottom end of the water collecting slot (205); The circulation slot (201) is connected to the liquid inlet switch (202), the liquid inlet switch (202) is connected to the measurement reaction unit (3), the reagent tank (203) is connected to one side of the quantitative peristaltic pump (204), and the other side of the quantitative peristaltic pump (204) is connected to the measurement reaction unit (3); The circulation groove (201) is fixedly connected to an upper portion of one side of the control box (1), the liquid inlet switch (202) and the quantitative peristaltic pump (204) are fixedly connected to the middle portion of the inner side of the control box (1), and the reagent tank (203) is arranged on one side of the inner side of the control box (1); The collecting tank (301) is arranged at the other side of the control box (1), the measuring pool (302) is fixedly connected to the upper part of the collecting tank (301), and the cleaning peristaltic pump (303) is fixedly connected to the middle part of the inner side of the control box (1); A water inlet pipe (209) is provided on one side of the water injection port (217), a drain pipe (211) is provided at the bottom of the drain port (207), and an overflow pipe (210) is provided at the bottom of the overflow port (208); the drain pipe (211) is connected to the input end of the liquid inlet switch (202), and the output end of the liquid inlet switch (202) is fixedly connected to the input end of the water inlet port (311); The flow channel (206), overflow port (208) and slot edge positions arranged inside the flow slot (201) are all arranged in an angular manner; The circulation conduit (206) comprises a first circulation port (2062), a second circulation port (2063) and a third circulation port (2064); a first circulation tube (2011) is arranged at the rear side of the first circulation port (2062); a second circulation tube (2012) is arranged at the front side of the first circulation port (2062); a third circulation tube (3011) is arranged at the front side of the second circulation tube (2012); a fourth circulation tube (3012) is arranged at the rear side of the second circulation tube (2012); a fifth circulation tube (4011) is arranged at the rear side of the third circulation port (2064); and a sixth circulation tube (4012) is arranged at the front side of the third circulation port (2064); The water injection port is connected to the first circulation pipe (2011), the second circulation pipe (2012) is connected to the third circulation pipe (3011) by providing a first connecting channel (218), the fourth circulation pipe (3012) is connected to the fifth circulation pipe (4011) by providing a second connecting channel (219), and the sixth circulation pipe (4012) is connected to the water collecting tank (205) by providing a third connecting channel (220); The measurement reaction unit (3) comprises a collection tank (301), a measurement pool (302) and a cleaning peristaltic pump (303); a reaction pool (308) is arranged inside the measurement pool (302); a stirring motor (306) and an overflow joint (307) are arranged at the bottom of the measurement pool (302); a sensor and filter port (309) are arranged on the other side of the measurement pool (302); a light source (310) is arranged on one side of the measurement pool (302); and a plurality of water inlets (311) are arranged at equal intervals on the upper part of the measurement pool (302).

2. A trace reagent water quality online monitoring device according to claim 1, characterized in that: The front side of the control box (1) is rotatably connected to a box door (101), the upper part of the box door (101) is provided with a transparent window (102), and the inner side of the water collecting tank (205) is provided with a liquid level sensor (216); A data display control system (4) is fixedly connected to the upper inner end of the control box (1), and a power supply module (5) is arranged on the upper part of the other side of the control box (1).

3. A trace reagent water quality online monitoring device according to any one of claims 1-2, characterized in that: A control valve (212) is disposed on the upper part of each reagent tank (203), a pressure gauge (213) is disposed on the outer side of each control valve (212), a first connecting tube (214) is disposed on the upper part of each control valve (212), the output end of each first connecting tube (214) is connected to the input end of each quantitative peristaltic pump (204), a plurality of second connecting tubes (215) are disposed at the output end of each quantitative peristaltic pump (204), and the output ends of each second connecting tube (215) are fixedly connected to the input end of each water inlet (311).

4. The device for online monitoring of water quality using trace reagents according to claim 1, characterized in that: The upper end of the collecting tank (301) is fixedly connected to a mounting seat (304), the measuring cell (302) is fixedly mounted on the upper part of the mounting seat (304), a sewage outlet (305) is provided at the rear bottom of the collecting tank (301), and the output ends of the overflow joint (307), the cleaning peristaltic pump (303) and the measuring cell (302) are all connected to the input end of the collecting tank (301).

5. The device for online monitoring of water quality using trace reagents according to claim 2, characterized in that: The power supply module (5) is electrically connected to the measurement detection unit (2) and the measurement reaction unit (3) respectively, and is used to supply power to various components of the measurement detection unit (2) and the measurement reaction unit (3); The power supply module (5) comprises: a filter module and a plurality of step-down modules; The filtering module is used to filter the connected alternating current into direct current; The step-down module is used to step down the filtered DC power to a suitable voltage for each device, and is mainly used to step down the 24V DC power to 12V, 5V and 3.3V to power each component in the measurement reaction unit.

6. A trace reagent water quality online monitoring device according to claim 2, characterized in that: Also includes: External controller; The external controller performs communication control with the data display control system (4) via a 485 communication module; Furthermore, the data display control system (4) communicates with the liquid level sensor (216) in the measurement and detection unit (2) via a 485 communication module.

7. A trace reagent water quality online monitoring device according to claim 6, characterized in that: The 485 communication module includes: an optocoupler isolation circuit, a chip isolation circuit and an RS485 transceiver circuit.

Images