Multi-parameter water quality detection device
By designing a multi-parameter water quality testing device, the problems of timeliness and accuracy of water quality testing during the transportation of tap water through pipelines have been solved, enabling rapid and accurate testing and real-time monitoring of tap water to ensure water quality safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 深圳市环境水务集团有限公司
- Filing Date
- 2025-05-20
- Publication Date
- 2026-07-21
AI Technical Summary
Existing water quality testing equipment cannot detect the pollution of tap water during pipeline transportation in a timely and accurate manner.
A multi-parameter water quality testing device was designed, comprising pH and temperature detection tanks, turbidity detection tanks, color detection tanks, residual chlorine detection tanks, and a reagent dispensing mechanism. Combined with a laser light source, photodiodes, and control circuits, it enables real-time online monitoring of multiple parameters of tap water.
It enables rapid and accurate detection of tap water during pipeline transportation, ensuring real-time online monitoring of drinking water and secondary water supply, and timely detection of water quality anomalies and sample retention for analysis.
Smart Images
Figure CN224535794U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to water quality testing equipment, and more particularly to a multi-parameter water quality testing equipment. Background Technology
[0002] Pollution can easily occur during the process of tap water being transported to the pumping station through pipelines, and existing detection equipment cannot detect it in a timely and accurate manner. Summary of the Invention
[0003] To address the problems in the existing technology, this utility model provides a multi-parameter water quality testing device.
[0004] This utility model provides a multi-parameter water quality testing device, including a pH and temperature testing tank, a turbidity testing tank, a color testing tank, a residual chlorine testing tank, a reagent dispensing mechanism, and a control circuit. The inlet of the pH and temperature testing tank is connected to an inlet pipe, the outlet of the pH and temperature testing tank is connected to the inlet of the turbidity testing tank, the outlet of the turbidity testing tank is connected to the inlet of the color testing tank, the outlet of the color testing tank is connected to a drain pipe, the residual chlorine testing tank is connected to a drain pipe, the turbidity testing tank, the residual chlorine testing tank, and the reagent dispensing mechanism are connected via a three-way valve, and the control circuit is connected to the pH and temperature testing tank, the turbidity testing tank, the color testing tank, the residual chlorine testing tank, and the reagent dispensing mechanism respectively.
[0005] As a further improvement of this utility model, the turbidity detection tank is connected to the NC port of the three-way valve, the residual chlorine detection tank is connected to the COM port of the three-way valve, and the reagent dispensing mechanism is connected to the NO port of the three-way valve. When the NC port and COM port of the three-way valve are connected, the turbidity detection tank is connected to the residual chlorine detection tank, and the water in the turbidity detection tank can enter the residual chlorine detection tank. When the NO port and COM port of the three-way valve are connected, the reagent dispensing mechanism is connected to the residual chlorine detection tank, and the reagent in the reagent dispensing mechanism can enter the residual chlorine detection tank.
[0006] As a further improvement of this utility model, the reagent dispensing mechanism includes an injection pump and a reagent container storing the reagent. The injection pump is connected to the reagent container, and the reagent container is connected to the NO port of the three-way valve.
[0007] As a further improvement of this utility model, the turbidity detection cell is provided with a laser light source and a laser receiver. When the light emitted by the laser light source passes through the liquid in the turbidity detection cell, it is scattered by the particulate matter in the liquid and received by the laser receiver. The laser receiver is connected to the control circuit.
[0008] As a further improvement of this utility model, the turbidity detection cell has at least two perpendicular planes, and the laser light source and laser receiver are respectively mounted on the two perpendicular planes.
[0009] As a further improvement of this utility model, the color detection cell is provided with a first monochromatic light source, a first optical fiber, a second monochromatic light source, a second optical fiber, a first photodiode, a second photodiode, a third photodiode, and a fourth photodiode. The color detection cell has a cavity for holding a water sample, which has a first plane, a second plane, a third plane, and a fourth plane. The first plane is parallel to the third plane, and the second plane is parallel to the fourth plane. The first and second photodiodes are respectively disposed on the third plane, and the third and fourth photodiodes are respectively disposed on the fourth plane. The light emitted by the first monochromatic light source passes through... The first optical fiber is split into two, one of which serves as the measurement optical path, incident from the first plane and received by the first photodiode on the third plane; the other serves as the reference optical path, incident from the second plane and received by the third photodiode on the fourth plane. The light emitted by the second monochromatic light source is split into two by the second optical fiber, one of which serves as the measurement optical path, incident from the first plane and received by the second photodiode on the third plane; the other serves as the reference optical path, incident from the second plane and received by the fourth photodiode on the fourth plane. The control circuit is connected to the first, second, third, and fourth photodiodes respectively.
[0010] As a further improvement of this utility model, the color detection pool is provided with a third monochromatic light source, a third optical fiber, a fifth photodiode, and a sixth photodiode. The light emitted by the third monochromatic light source is split into two by the third optical fiber. One path serves as the measurement light path, enters from the first plane, and is received by the fifth photodiode on the third plane. The other path serves as the reference light path, enters from the second plane, and is received by the sixth photodiode on the fourth plane. The control circuit is connected to the fifth and sixth photodiodes.
[0011] As a further improvement of this utility model, the distance between the first plane and the third plane is greater than the distance between the second plane and the fourth plane, and the first plane and the second plane are perpendicular to each other.
[0012] As a further improvement of this utility model, the residual chlorine detection cell is provided with a fourth monochromatic light source and a seventh photodiode. The light emitted by the fourth monochromatic light source is received by the seventh photodiode, and the seventh photodiode is connected to the control circuit.
[0013] As a further improvement of this utility model, an inlet valve is provided on the inlet pipe, a sample retention pipe is connected to the inlet pipe, a sample retention valve is provided on the sample retention pipe, and the control circuit adopts an environmental protection online monitoring controller.
[0014] The beneficial effects of this utility model are: through the above solution, a multi-parameter water quality testing device is provided, which can quickly and accurately test the water quality during the process of tap water being transported to the pumping station through pipelines, and realize real-time online monitoring of drinking water and secondary water supply. Attached Figure Description
[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other solutions can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of a multi-parameter water quality testing device according to this utility model.
[0017] Figure 2 This is a schematic diagram of the optical path of the first monochromatic light source of a multi-parameter water quality testing device of this utility model. Detailed Implementation
[0018] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0022] like Figures 1 to 2 As shown, a multi-parameter water quality testing device includes a pH and temperature testing tank 1, a turbidity testing tank 2, a color testing tank 3, a residual chlorine testing tank 4, a reagent dispensing mechanism 5, and a control circuit (not shown in the figure).
[0023] The inlet of the pH and temperature detection pool 1 is connected to an inlet pipe 7. The outlet of the pH and temperature detection pool 1 is connected to the inlet of the turbidity detection pool 2. The outlet of the turbidity detection pool 2 is connected to the inlet of the color detection pool 3. The outlet of the color detection pool 3 is connected to a drain pipe 91. The residual chlorine detection pool 4 is connected to a drain pipe 92. The turbidity detection pool 2, the residual chlorine detection pool 4, and the reagent dispensing mechanism 5 are connected through a three-way valve 6. The control circuit is connected to the pH and temperature detection pool 1, the turbidity detection pool 2, the color detection pool 3, the residual chlorine detection pool 4, and the reagent dispensing mechanism 5, respectively.
[0024] The turbidity detection tank 2 is connected to the NC port of the three-way valve 6, the residual chlorine detection tank 4 is connected to the COM port of the three-way valve 6, and the reagent dispensing mechanism 5 is connected to the NO port of the three-way valve 6. When the NC port and COM port of the three-way valve 6 are connected, the turbidity detection tank 2 is connected to the residual chlorine detection tank 4, and the water in the turbidity detection tank 2 can enter the residual chlorine detection tank 4. When the NO port and COM port of the three-way valve 6 are connected, the reagent dispensing mechanism 5 is connected to the residual chlorine detection tank 4, and the reagent in the reagent dispensing mechanism 5 can enter the residual chlorine detection tank 4 for residual chlorine detection.
[0025] The reagent dispensing mechanism 5 includes an injection pump 51 and a reagent container 52 containing reagents. The injection pump 51 is connected to the reagent container 52, and the reagent container 52 is connected to the NO port of the three-way valve 6.
[0026] The turbidity detection cell 2 is equipped with a laser light source 21 and a laser receiver 22. When the light emitted by the laser light source 21 passes through the liquid in the turbidity detection cell 2, it is scattered by the particulate matter in the liquid and received by the laser receiver 22. The laser receiver 22 is connected to the control circuit.
[0027] The turbidity detection cell 2 has at least two perpendicular planes, and the laser light source 21 and the laser receiver 22 are respectively mounted on the two perpendicular planes.
[0028] The color detection cell 3 is equipped with a first monochromatic light source 31, a first beam splitter 311, a second monochromatic light source 32, a second beam splitter 321, a first photodiode 312, a second photodiode 322, a third photodiode 313, and a fourth photodiode 323. The color detection cell 3 has a cavity for holding a water sample, which has a first plane 101, a second plane 102, a third plane 103, and a fourth plane 104. The first plane 101 is parallel to the third plane 103, and the second plane 102 is parallel to the fourth plane 104. The first photodiode 312 and the second photodiode 322 are respectively disposed on the third plane 103, and the third photodiode 313 and the fourth photodiode 323 are respectively disposed on the fourth plane 104. The light emitted by the first monochromatic light source 31 passes through the... The first optical fiber 311 is split into two, one of which serves as the measurement optical path, incident from the first plane 101 and received by the first photodiode 312 on the third plane 103; the other serves as the reference optical path, incident from the second plane 102 and received by the third photodiode 313 on the fourth plane 104. The light emitted by the second monochromatic light source 32 is split into two by the second optical fiber 321, one of which serves as the measurement optical path, incident from the first plane 101 and received by the second photodiode 322 on the third plane 103; the other serves as the reference optical path, incident from the second plane 102 and received by the fourth photodiode 323 on the fourth plane 104. The control circuit is connected to the first photodiode 312, the second photodiode 322, the third photodiode 313, and the fourth photodiode 323, respectively.
[0029] The color detection cell 3 is equipped with a third monochromatic light source 33, a third beam splitter 331, a fifth photodiode 332, and a sixth photodiode 333. The light emitted by the third monochromatic light source 33 is split into two by the third beam splitter 331. One path serves as the measurement light path, entering from the first plane 101 and being received by the fifth photodiode 332 on the third plane 103. The other path serves as the reference light path, entering from the second plane 102 and being received by the sixth photodiode 333 on the fourth plane 104. The control circuit is connected to the fifth photodiode 332 and the sixth photodiode 333.
[0030] The distance between the first plane 101 and the third plane 103 is greater than the distance between the second plane 102 and the fourth plane 104. That is, the optical path between the second plane 20 and the fourth plane 40 is shorter, while the optical path between the first plane 10 and the third plane 30 is longer. The side with the shorter optical path is used as a reference, and the side with the longer optical path is used as the receiver. The actual optical path is the difference between the optical paths of the two perpendicular planes.
[0031] The first plane 101 and the second plane 102 are perpendicular to each other.
[0032] The optical path of the first monochromatic light source 31 is as follows: Figure 2 As shown, the optical paths of the second monochromatic light source 32 and the third monochromatic light source 33 are the same as those of the first monochromatic light source 31.
[0033] The residual chlorine detection cell 4 is equipped with a fourth monochromatic light source 41 and a seventh photodiode 42. The light emitted by the fourth monochromatic light source 41 is received by the seventh photodiode 42, which is connected to the control circuit.
[0034] The mounting planes of the fourth monochromatic light source 41 and the seventh photodiode 42 are parallel.
[0035] The water inlet pipe 7 is equipped with a water inlet valve 71, which can be used to control the water inlet.
[0036] The water inlet pipe 7 is connected to a sample retention pipe 8, and the sample retention pipe 8 is equipped with a sample retention valve 81, which can be used for sample retention.
[0037] The control circuit adopts an environmental protection online monitoring controller, preferably the environmental protection online monitoring instrument controller V2.1.
[0038] The control circuit can use a microcontroller or other controller.
[0039] The control circuit is connected to a host computer via wired or wireless means.
[0040] In this embodiment, a 420nm light source is used as the first monochromatic light source 31, a 525nm light source as the second monochromatic light source 32, a 700nm light source as the third monochromatic light source 33, and a 510nm light source as the fourth monochromatic light source 41 for water quality detection as follows:
[0041] When the device starts sampling, the inlet valve 71 and the three-way valve 6 are opened first. The three-way valve 6 is switched to the NC side, and NC is connected to COM. Pressurized water samples flow sequentially into pH and temperature detection tank 1, turbidity detection tank 2, color detection tank 3, and residual chlorine detection tank 4. After a period of time, the water sample remaining from the previous sampling is completely replaced with new water sample. At this time, the inlet valve 71 is closed, and the three-way valve 6 is switched to the NO side, and NO is connected to COM. The control circuit (environmental online monitoring controller V2.1) reads the pH and temperature values of pH and temperature detection tank 1 and supplies light to the laser light source 21, the 510nm light source (i.e., the fourth monochromatic light source 41), and the 525nm light source (i.e., the second monochromatic light source 32), respectively. A 420nm light source (i.e., the first monochromatic light source 31) and a 700nm light source (i.e., the third monochromatic light source 33) provide constant current sources to drive the light sources to emit stable monochromatic light. When the laser light source 21 passes through the liquid, the particles in the liquid cause the laser to be scattered. The laser receiver 22, installed at 90°, receives the scattered laser light and converts the detected light intensity signal into a current signal. After IV conversion and AD conversion by the control circuit (environmental online monitoring controller V2.1), the corresponding turbidity value is calculated according to the calibration curve (the calculation of turbidity value is existing technology, and this utility model does not propose an improvement on how to calculate turbidity value). After the light emitted by the 510nm light source passes through the liquid, the 510nm receiver will... The detected light intensity signal is converted into a current signal, which is then converted into an IV and an AD signal by the control circuit (Environmental Protection Online Monitoring Controller V2.1) and used as a residual chlorine reference. Monochromatic light emitted from 525nm, 420nm, and 700nm light sources is split into two beams by a fiber optic splitter mounted on the fiber optic fixing component. The beams are then projected onto two perpendicular surfaces. The side with the shorter optical path serves as the reference, and the side with the longer optical path serves as the receiver. The actual optical path is the difference between the two perpendicular surfaces. Photodiodes are installed on opposite sides of the incident light as the reference and receiver, respectively. The photodiodes linearly convert the received light intensity into a weak current signal. The control circuit (Environmental Protection Online Monitoring Controller V2.1) collects the signal. The reference and receiver detects the current signal, performs IV conversion and AD conversion, calculates the absorbance, and then calculates the specific color measurement value according to the calibration curve (the calculation of the color measurement value is existing technology, and this utility model does not propose an improvement on how to calculate the color measurement value); the syringe pump 51 pushes reagent one and reagent two from the reagent container 52 into the residual chlorine reaction tank 5 respectively. The residual chlorine in the water sample reacts with the reagents and turns pink. The color depth is proportional to the residual chlorine concentration. The 510nm receiver converts the detected light intensity signal into a current signal, which is then converted by the control circuit (environmental online monitoring controller V2.1) into IV conversion and AD conversion and used as the residual chlorine receiver.1) The system calculates the residual chlorine absorbance based on the residual chlorine reference and the received data, and calculates the residual chlorine measurement value according to the stored calibration curve (the calculation of residual chlorine measurement value is existing technology, and this invention does not propose any improvement on how to calculate the residual chlorine measurement value); when the water sample is contaminated (e.g., excessive rust or permanganate), it can be promptly indicated by yellow and pink colors; when any factor's measurement value exceeds the preset alarm threshold, the system will open the sample retention valve to retain the sample for easy manual comparison.
[0042] Each measurement value can be transmitted to the host computer via RS232 and RS485 interfaces; when reagent is out of liquid or the system malfunctions, the human-machine interface will issue an alarm.
[0043] This utility model provides a multi-parameter water quality testing device that can quickly and accurately test water quality during the process of tap water being transported to the pumping station through pipelines, thereby realizing real-time online monitoring of drinking water and secondary water supply.
[0044] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.
Claims
1. A multi-parameter water quality testing device, characterized in that: The system includes a pH and temperature detection tank, a turbidity detection tank, a color detection tank, a residual chlorine detection tank, a reagent dispensing mechanism, and a control circuit. The inlet of the pH and temperature detection tank is connected to an inlet pipe, and the outlet of the pH and temperature detection tank is connected to the inlet of the turbidity detection tank. The outlet of the turbidity detection tank is connected to the inlet of the color detection tank, and the outlet of the color detection tank is connected to a drain pipe. The residual chlorine detection tank is also connected to a drain pipe. The turbidity detection tank, residual chlorine detection tank, and reagent dispensing mechanism are connected via a three-way valve. The control circuit is connected to each of the pH and temperature detection tank, turbidity detection tank, color detection tank, residual chlorine detection tank, and reagent dispensing mechanism. The three-way valve is connected to the NC port, the residual chlorine detection tank is connected to the COM port, and the reagent dispensing mechanism is connected to the NO port. When the NC and COM ports of the three-way valve are connected, the turbidity detection tank is connected to the residual chlorine detection tank, and water in the turbidity detection tank can enter the residual chlorine detection tank. When the NO and COM ports of the three-way valve are connected, the reagent dispensing mechanism is connected to the residual chlorine detection tank, and reagent in the reagent dispensing mechanism can enter the residual chlorine detection tank. The reagent dispensing mechanism includes an injection pump and a reagent container storing reagents. The injection pump is connected to the reagent container, and the reagent container is connected to the NO port of the three-way valve.
2. The multi-parameter water quality testing equipment according to claim 1, characterized in that: The turbidity detection cell is equipped with a laser source and a laser receiver. When the light emitted by the laser source passes through the liquid in the turbidity detection cell, it is scattered by the particulate matter in the liquid and received by the laser receiver. The laser receiver is connected to the control circuit.
3. The multi-parameter water quality testing equipment according to claim 2, characterized in that: The turbidity detection cell has at least two perpendicular planes, and the laser source and laser receiver are respectively mounted on the two perpendicular planes.
4. The multi-parameter water quality testing equipment according to claim 1, characterized in that: The color detection cell is equipped with a first monochromatic light source, a first beam-splitting optical fiber, a second monochromatic light source, a second beam-splitting optical fiber, a first photodiode, a second photodiode, a third photodiode, and a fourth photodiode. The color detection cell has a cavity for holding a water sample, which has a first plane, a second plane, a third plane, and a fourth plane. The first plane is parallel to the third plane, and the second plane is parallel to the fourth plane. The first and second photodiodes are respectively disposed on the third plane, and the third and fourth photodiodes are respectively disposed on the fourth plane. The light emitted from the first monochromatic light source passes through the first beam-splitting optical fiber. The optical fiber is split into two paths. One path serves as the measurement optical path, incident from the first plane and received by the first photodiode on the third plane. The other path serves as the reference optical path, incident from the second plane and received by the third photodiode on the fourth plane. The light emitted from the second monochromatic light source is split into two paths by the second optical fiber. One path serves as the measurement optical path, incident from the first plane and received by the second photodiode on the third plane. The other path serves as the reference optical path, incident from the second plane and received by the fourth photodiode on the fourth plane. The control circuit is connected to the first, second, third, and fourth photodiodes, respectively.
5. The multi-parameter water quality testing equipment according to claim 4, characterized in that: The color detection pool is equipped with a third monochromatic light source, a third optical fiber, a fifth photodiode, and a sixth photodiode. The light emitted by the third monochromatic light source is split into two by the third optical fiber. One path serves as the measurement light path, enters from the first plane, and is received by the fifth photodiode on the third plane. The other path serves as the reference light path, enters from the second plane, and is received by the sixth photodiode on the fourth plane. The control circuit is connected to the fifth and sixth photodiodes.
6. The multi-parameter water quality testing equipment according to claim 4, characterized in that: The distance between the first plane and the third plane is greater than the distance between the second plane and the fourth plane, and the first plane and the second plane are perpendicular to each other.
7. The multi-parameter water quality testing equipment according to claim 1, characterized in that: The residual chlorine detection cell is equipped with a fourth monochromatic light source and a seventh photodiode. The light emitted by the fourth monochromatic light source is received by the seventh photodiode, which is connected to the control circuit.
8. The multi-parameter water quality testing equipment according to claim 1, characterized in that: The inlet pipe is equipped with an inlet valve, the inlet pipe is connected to a sample retention pipe, the sample retention pipe is equipped with a sample retention valve, and the control circuit adopts an environmental protection online monitoring controller.