Self-cleaning nitrite sensor

Abstract

The utility model discloses a self-cleaning nitrite sensor which comprises a sensor body, an electrode sensing end, a signal processing and transmission module and a PLC (programmable logic controller), a self-cleaning mechanism is arranged in the sensor body, a protection mechanism is arranged outside the sensor body, the interior of the sensor body is divided into a plurality of cavities by a division disc, and the division disc is arranged in the cavities. The self-cleaning mechanism comprises a first micro air cylinder, the first micro air cylinder is fixedly arranged on the dividing disc on the inner wall of the sensor body, the output end of the first micro air cylinder is fixedly connected with a connecting disc, and the connecting disc can slide in the sensor body. According to the self-cleaning nitrite sensor, the cleaning unit can be used for regularly scraping and cleaning the electrode sensing end, pollutants can be prevented from being accumulated on the surface of the electrode sensing end, the electrode sensing end is in full contact with a water sample, the nitrite detection precision and accuracy are improved, and the practicability and functionality of the device are improved.

Description

Technical Field

[0001] This utility model relates to the field of nitrite sensors, and more specifically, to a self-cleaning nitrite sensor. Background Technology

[0002] A nitrite sensor is a device used to detect the nitrite content in a solution. It works by generating an electrical signal through a redox reaction of nitrite on an electrode surface. When nitrite comes into contact with a specific electrode, electrons transfer between the electrode and the solution, creating a current or potential change. By measuring the magnitude of these electrical signals and comparing them with a standard nitrite solution of known concentration, the nitrite content in the sample can be determined.

[0003] An existing patent, CN216525780U, entitled "A Water Nitrate and Nitrite Detection Sensor," includes an external protective mechanism, an internal reinforcement mechanism, and a sandwich anti-corrosion mechanism. The internal reinforcement mechanism is installed on the inner walls of the external protective mechanism, and the sandwich anti-corrosion mechanism is installed inside the outer perimeter of the external protective mechanism. This water nitrate and nitrite detection sensor provides a certain degree of protection for the sensing end, which is fixedly connected to the bottom of the device and the outer casing, through a protective cover.

[0004] However, existing nitrite sensor detection electrodes typically use ion-selective electrodes. When using nitrite sensors for detection, natural water bodies or industrial wastewater contain various suspended particles, colloidal substances, organic matter, etc., which may adhere to the electrode surface, preventing the electrode sensing tip from making sufficient contact with the water sample and reducing the practicality of the device. Utility Model Content

[0005] One objective of this invention is to provide a new technical solution for a self-cleaning nitrite sensor.

[0006] According to a first aspect of this utility model, a self-cleaning nitrite sensor is provided, comprising: a sensor body, an electrode sensing end, a signal processing and transmission module, and a PLC controller. The sensor body has a self-cleaning mechanism inside and a protective mechanism outside. The sensor body is divided into multiple cavities by a dividing plate. The self-cleaning mechanism includes a first micro-cylinder, which is fixedly mounted on the dividing plate on the inner wall of the sensor body. A connecting plate is fixedly connected to the output end of the first micro-cylinder, and the connecting plate can slide inside the sensor body. A micro-motor is fixedly connected to the bottom end of the connecting plate, and a gear is connected to the output end of the micro-motor via a coupling. A rack plate is connected to the gear via tooth meshing, and a connecting rod is fixedly connected to the bottom end of the rack plate. A connecting column is fixedly connected to the bottom end of the connecting rod via a connecting plate, and a scraping ring is fixedly connected to the bottom end of the connecting column.

[0007] Preferably, a second micro cylinder is fixedly connected to a dividing disk on the inner wall of the sensor body, a support disk is fixedly connected to the output end of the second micro cylinder, a support column is fixedly connected to the upper end of the support disk, the support column is slidably disposed inside a slide rail, and the slide rail is opened inside a rack plate.

[0008] Preferably, a limiting post is fixedly connected to the upper end of the connecting plate. The limiting post is L-shaped, and the end of the limiting post away from the connecting plate is slidably disposed inside the slide groove, which is located inside the sensor body.

[0009] Preferably, the electrode sensing end, signal processing and transmission module, PLC controller, first micro cylinder, micro motor and second micro cylinder are electrically connected.

[0010] Preferably, the protective mechanism includes a protective housing, which is mounted on the bottom of the sensor body. The protective housing can be installed outside the electrode sensing end. The protective housing has an internal thread inside, and the sensor body has an external thread outside.

[0011] Preferably, the outer surface of the protective shell is fitted with anti-collision strips and rubber edging.

[0012] 1. This utility model utilizes the cooperation of a first micro cylinder, connecting plate, micro motor, gear, rack plate, connecting rod, connecting plate, connecting column, scraping ring, second micro cylinder, support plate, support column, and slide rail. When a preset cleaning cycle is reached, the PLC controller starts and controls the first micro cylinder to move, causing it to move the connecting plate downwards synchronously. This, in turn, drives the micro motor and gear to move synchronously, moving the entire self-cleaning unit synchronously until the scraping ring moves out of the sensor body and is positioned outside the electrode sensing end. At this point, the PLC controller starts the micro motor, driving the gear to rotate. Under the meshing action of the teeth, the two sets of rack plates move relative to each other. The movement, in turn, causes the connecting rod, connecting plate, and connecting column to move synchronously relative to each other, placing the two sets of scraping rings and their surface cleaning plates outside the electrode sensing end. The PLC controller then controls the first micro cylinder to start, causing it to drive the entire cleaning unit to move up and down reciprocally. The scraping rings can be used to scrape and clean the surface of the electrode sensing end, enabling the self-cleaning nitrite sensor to periodically scrape and clean the electrode sensing end using the cleaning unit. This prevents contaminants from accumulating on the surface of the electrode sensing end, ensures full contact between the electrode sensing end and the water sample, reduces interference factors, improves the accuracy and precision of nitrite detection, and enhances the practicality and functionality of the device.

[0013] 2. This utility model, through the cooperation of the protective shell, internal threads, and external threads, allows the protective shell to be installed at the bottom of the sensor body when it is not in operation. The protective shell surrounds the electrode sensing end, protecting it from damage. The protective shell is installed at the bottom of the sensor body through internal and external threads, making it easy to install and remove. This self-cleaning nitrite sensor can provide external protection for the electrode sensing end, preventing it from being damaged by external factors, thus improving the practicality and safety of the device.

[0014] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with their description, serve to explain the principles of the present invention.

[0016] Figure 1 This is a frontal perspective three-dimensional schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a frontal three-dimensional schematic diagram of the overall structure of the protective mechanism of this utility model;

[0018] Figure 3 This is a frontal three-dimensional sectional view of the overall structure of this utility model;

[0019] Figure 4 This is a bottom-view perspective sectional view of the overall structure of this utility model;

[0020] Figure 5 This utility model Figure 4 Enlarged schematic diagram of the structure at point A in the middle.

[0021] The diagram shows the following: 111, Sensor body; 112, Electrode sensing end; 113, Signal processing and transmission module; 114, PLC controller; 2, Self-cleaning mechanism; 211, First micro cylinder; 212, Connecting plate; 213, Micro motor; 214, Gear; 215, Rack plate; 216, Connecting rod; 217, Connecting plate; 218, Connecting column; 219, Scraper ring; 220, Second micro cylinder; 221, Support plate; 222, Support column; 223, Slide rail; 224, Limiting column; 225, Slide groove; 3, Protective mechanism; 311, Protective shell; 312, Internal thread; 313, External thread. Detailed Implementation

[0022] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0023] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0024] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0025] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0026] like Figure 1-5 As shown, one embodiment of this utility model is provided:

[0027] A self-cleaning nitrite sensor is disclosed in this application. The sensor body 111, electrode sensing end 112, signal processing and transmission module 113, PLC controller 114, first micro cylinder 211, micro motor 213, and second micro cylinder 220 used in this application are commercially available products. Their principles and connection methods are existing technologies well known to those skilled in the art.

[0028] The system includes: a sensor body 111, electrode sensing terminals 112, a signal processing and transmission module 113, and a PLC controller 114. The sensor body 111 has a self-cleaning mechanism 2 inside and a protective mechanism 3 outside. The sensor body 111 is internally divided into multiple cavities by a dividing plate. The self-cleaning mechanism 2 includes a first micro cylinder 211, which is fixedly mounted on the dividing plate on the inner wall of the sensor body 111. The output end of the first micro cylinder 211 is fixed... A connecting plate 212 is connected, which can slide inside the sensor body 111. A micro motor 213 is fixedly connected to the bottom of the connecting plate 212. The output end of the micro motor 213 is connected to a gear 214 through a coupling. A rack plate 215 is connected to the outside of the gear 214 through tooth meshing. A connecting rod 216 is fixedly connected to the bottom of the rack plate 215. A connecting column 218 is fixedly connected to the bottom of the connecting rod 216 through a connecting plate 217. A scraping ring 219 is fixedly connected to the bottom of the connecting column 218.

[0029] When using this self-cleaning nitrite sensor, the nitrite sensor is immersed in the water sample to be tested, and the electrode sensing end 112 is in contact with the water sample. Nitrite ions undergo an ion exchange reaction on the surface of the electrode sensing end 112, generating a potential difference related to the nitrite concentration. This potential difference is converted and processed by the signal processing and transmission module 113 to obtain the nitrite concentration value and output it.

[0030] When the preset cleaning cycle is reached, the PLC controller 114 starts, controlling the first micro cylinder 211 to move, causing it to drive the connecting plate 212 to move downwards synchronously. This, in turn, drives the micro motor 213 and gear 214 to move synchronously, moving the entire self-cleaning unit until the scraping ring 219 moves out of the sensor body 111 and is placed outside the electrode sensing end 112. At this time, the PLC controller 114 controls the micro motor 213 to start, driving the gear 214 to rotate. Under the meshing action of the teeth, the two sets of rack plates 215 move relative to each other, thereby driving the connecting plate 212 to move downwards. The connecting rod 216, connecting plate 217, and connecting column 218 move synchronously relative to each other, so that the two sets of scraping rings 219 and their surface cleaning plates are placed outside the electrode sensing end 112. The PLC controller 114 controls the first micro cylinder 211 to start again, so that it drives the entire cleaning unit to move up and down reciprocally. The scraping rings 219 can be used to scrape and clean the surface of the electrode sensing end 112, which can prevent contaminants from accumulating on the surface of the electrode sensing end 112, ensure that the electrode sensing end 112 is in full contact with the water sample, reduce interference factors, and improve the accuracy and precision of nitrite detection.

[0031] A second micro cylinder 220 is fixedly connected to a dividing plate on the inner wall of the sensor body 111. A support plate 221 is fixedly connected to the output end of the second micro cylinder 220. A support column 222 is fixedly connected to the upper end of the support plate 221. The support column 222 is slidably disposed inside the slide rail 223. The slide rail 223 is opened inside the rack plate 215.

[0032] The first micro cylinder 211 and the second micro cylinder 220 are controlled in parallel by the PLC controller 114, so that the two sets of cylinders can work synchronously. When the first micro cylinder 211 drives the rack plate 215 to move downward, the second micro cylinder 220 retracts synchronously, so that the rack plate 215 is supported vertically by the support column 222, thus preventing the rack plate 215 from falling off.

[0033] A limiting post 224 is fixedly connected to the upper end of the connecting plate 212. The limiting post 224 is L-shaped. The end of the limiting post 224 away from the connecting plate 212 is slidably disposed inside the slide groove 225. The slide groove 225 is opened inside the sensor body 111.

[0034] When the connecting plate 212 and its lower cleaning unit move up and down, the limiting post 224 moves synchronously inside the slide groove 225 to limit its movement and make its movement more stable.

[0035] The electrode sensing end 112, signal processing and transmission module 113, PLC controller 114, first micro cylinder 211, micro motor 213 and second micro cylinder 220 are electrically connected.

[0036] The protective mechanism 3 includes a protective housing 311, which is mounted on the bottom of the sensor body 111. The protective housing 311 can be installed outside the electrode sensing end 112. The protective housing 311 has an internal thread 312 inside and an external thread 313 outside the sensor body 111.

[0037] When using this self-cleaning nitrite sensor, in its non-operating state, the protective housing 311 can be installed at the bottom of the sensor body 111 to surround the electrode sensing end 112, thus protecting the electrode sensing end 112 from damage. The protective housing 311 is installed at the bottom of the sensor body 111 through the internal thread 312 and the external thread 313, making it easy to install and remove.

[0038] The outer surface of the protective housing 311 is fitted with anti-collision strips and rubber edging;

[0039] The protective capabilities of the protective housing 311 are further enhanced by the anti-collision strips and rubber edging installed on the outer surface of the protective housing 311.

[0040] Working principle

[0041] When using this self-cleaning nitrite sensor, the nitrite sensor is immersed in the water sample to be tested, and the electrode sensing end 112 is in contact with the water sample. Nitrite ions undergo an ion exchange reaction on the surface of the electrode sensing end 112, generating a potential difference related to the nitrite concentration. This potential difference is converted and processed by the signal processing and transmission module 113 to obtain the nitrite concentration value and output it.

[0042] When the preset cleaning cycle is reached, the PLC controller 114 starts, controlling the first micro cylinder 211 to move, causing it to drive the connecting plate 212 to move downwards synchronously. This, in turn, drives the micro motor 213 and gear 214 to move synchronously, moving the entire self-cleaning unit until the scraping ring 219 moves out of the sensor body 111 and is placed outside the electrode sensing end 112. At this time, the PLC controller 114 controls the micro motor 213 to start, driving the gear 214 to rotate. Under the meshing action of the teeth, the two sets of rack plates 215 move relative to each other, thereby driving the connecting plate 212 to move downwards. The connecting rod 216, connecting plate 217, and connecting column 218 move synchronously relative to each other, so that the two sets of scraping rings 219 and their surface cleaning plates are placed outside the electrode sensing end 112. The PLC controller 114 controls the first micro cylinder 211 to start again, so that it drives the entire cleaning unit to move up and down reciprocally. The scraping rings 219 can be used to scrape and clean the surface of the electrode sensing end 112, which can prevent contaminants from accumulating on the surface of the electrode sensing end 112, ensure that the electrode sensing end 112 is in full contact with the water sample, reduce interference factors, and improve the accuracy and precision of nitrite detection.

[0043] When using this self-cleaning nitrite sensor, in its non-operating state, the protective housing 311 can be installed at the bottom of the sensor body 111 to surround the electrode sensing end 112, thus protecting the electrode sensing end 112 from damage. The protective housing 311 is installed at the bottom of the sensor body 111 via internal threads 312 and external threads 313, making it easy to install and remove. This completes the operation.

[0044] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A self-cleaning nitrite sensor, comprising: The sensor body (111), electrode sensing end (112), signal processing and transmission module (113), and PLC controller (114) are characterized in that: a self-cleaning mechanism (2) is provided inside the sensor body (111), a protective mechanism (3) is provided outside the sensor body (111), the inside of the sensor body (111) is divided into multiple cavities by a dividing plate, the self-cleaning mechanism (2) includes a first micro cylinder (211), the first micro cylinder (211) is fixedly installed on the dividing plate on the inner wall of the sensor body (111), and the output end of the first micro cylinder (211) is fixedly connected to... A connecting plate (212) is connected, which can slide inside the sensor body (111). A micro motor (213) is fixedly connected to the bottom end of the connecting plate (212). A gear (214) is connected to the output end of the micro motor (213) through a coupling. A rack plate (215) is connected to the outside of the gear (214) through tooth meshing. A connecting rod (216) is fixedly connected to the bottom end of the rack plate (215). A connecting column (218) is fixedly connected to the bottom end of the connecting rod (216) through a connecting plate (217). A scraping ring (219) is fixedly connected to the bottom end of the connecting column (218).

2. The self-cleaning nitrite sensor according to claim 1, characterized in that: A second micro cylinder (220) is fixedly connected to a dividing disk on the inner wall of the sensor body (111). A support disk (221) is fixedly connected to the output end of the second micro cylinder (220). A support column (222) is fixedly connected to the upper end of the support disk (221). The support column (222) is slidably disposed inside the slide rail (223). The slide rail (223) is opened inside the rack plate (215).

3. The self-cleaning nitrite sensor according to claim 1, characterized in that: The upper end of the connecting plate (212) is fixedly connected to a limiting post (224). The limiting post (224) is L-shaped. The end of the limiting post (224) away from the connecting plate (212) is slidably disposed inside the slide groove (225). The slide groove (225) is opened inside the sensor body (111).

4. The self-cleaning nitrite sensor according to claim 1, characterized in that: The electrode sensing end (112), signal processing and transmission module (113), PLC controller (114), first micro cylinder (211), micro motor (213) and second micro cylinder (220) are electrically connected.

5. A self-cleaning nitrite sensor according to claim 1, characterized in that: The protective mechanism (3) includes a protective shell (311), which is mounted on the bottom of the sensor body (111). The protective shell (311) can be installed outside the electrode sensing end (112). The protective shell (311) has an internal thread (312) inside and an external thread (313) outside the sensor body (111).

6. A self-cleaning nitrite sensor according to claim 5, characterized in that: The outer surface of the protective shell (311) is fitted with anti-collision strips and rubber edging.

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