Nitrate concentration detection device with automatic water sample filtering function

Abstract

The utility model discloses a nitrate concentration detection device with an automatic water sample filtering function, which comprises a shell immersed in water, a filter is arranged on the left side of the shell, a connector is arranged on the right side of the shell, and the filter is communicated with the connector through a water channel arranged in the shell in a left-right extending manner. The connector is connected with a water ejector assembly used for enabling a water sample to enter and exit from the water channel, a light channel used for allowing light to pass through is arranged in the shell in a front-back extending mode and penetrates through the water channel, and light-transmitting plugs are arranged on the two sides, making contact with the water channel, of the light channel. A receiver used for receiving light waves is arranged at the front end of the light channel, and a light source used for alternately emitting dual-wavelength light is arranged at the rear end of the light channel. According to the water injector assembly, a water sample enters the water channel through the filter to be detected, that is, the water sample can be automatically filtered during detection, so that the influence of turbidity and suspended solids on a detection result can be eliminated, and large errors are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of water quality online analysis equipment, and in particular relates to a nitric nitrogen concentration detection device with a water sample automatic filtering function. Background Art

[0002] When testing water quality, most of them are done by taking out water samples and putting them into the detector for water quality testing. A small part can realize online testing, that is, the corresponding detector can be immersed in water for testing. For example, a multi-parameter online simultaneous monitoring sensor for COD and nitrate nitrogen content disclosed in Chinese patent CN104880429A can be directly immersed in water for measurement. However, when the turbidity and suspended matter in the water are high, it cannot eliminate the influence of turbidity and suspended matter on the test results. Utility Model Content

[0003] The utility model proposes a nitric nitrogen concentration detection device with a water sample automatic filtering function, which can be directly immersed in water for measurement and can eliminate the influence of turbidity and suspended matter on the detection result.

[0004] To this end, the technical solution adopted by the utility model is: a nitric nitrogen concentration detection device with an automatic water sample filtering function, comprising a shell immersed in water, a filter is arranged on the left side of the shell, a connector is arranged on the right side of the shell, and the filter and the connector are connected through a water channel extending left and right inside the shell, a water injector assembly for realizing the entry and exit of water samples into and out of the water channel is connected to the connector, an optical channel for light passing is arranged extending frontward and rearward in the shell, and the optical channel passes through the water channel, a light-transmitting plug for preventing water samples from entering the optical channel and having a light-transmitting effect is arranged at the position where the optical channel contacts the water channel, a receiver for receiving light waves is arranged at the front end of the optical channel, and a light source for alternately emitting dual-wavelength light is arranged at the rear end of the optical channel.

[0005] As a preferred embodiment of the above solution, a lens is provided at a position of the optical channel close to the rear end, and a filter is provided at a position of the optical channel close to the front end.

[0006] Further preferably, a light source intensity monitoring channel for light to pass through is provided at a position close to the rear end of the optical channel, and a monitoring receiver is provided at the end of the light source intensity monitoring channel.

[0007] Further preferably, the housing comprises a frame and an upper cover arranged on the frame, and a sealing ring is arranged between the frame and the upper cover.

[0008] Further preferably, the upper cover is provided with a mounting joint for fixing the analyzer placed in water, and the mounting joint is equipped with a fixing rod.

[0009] Further preferably, the water ejector assembly includes a water ejector, an air inlet of the water ejector is connected to a compression pipeline for realizing compressed air input, a liquid suction port of the water ejector is connected to a connector via a connecting pipeline, a mixing outlet of the water ejector is connected to an output pipeline for realizing compressed air or air-water mixed liquid output, and a control valve for controlling the on-off of the pipeline is arranged on the output pipeline.

[0010] Further preferably, it is also equipped with a display part for displaying the measured nitric nitrogen concentration and facilitating observation, and the display part is connected to the receiver through a cable; it is also equipped with a control part, and the control part is electrically connected to the display part, the receiver, the monitoring receiver, the light source and the control valve, and the control part is used to realize the opening and closing of the control valve and the switching of the light source.

[0011] Further preferably, the light source includes a control module arranged in the shell and used to switch the wavelength of light, and a lamp bead arranged at the rear end of the optical channel through an optical mounting bracket, and the receiver includes a receiving module arranged at the front end of the optical channel through a receiving mounting bracket and a processing module arranged in the shell.

[0012] Beneficial effects of the utility model:

[0013] 1. The present application uses a water ejector assembly to allow water samples to be filtered through a filter and then enter a water channel for detection, that is, the water samples can be automatically filtered during detection, thereby eliminating the effects of turbidity and suspended matter on the detection results and avoiding large errors.

[0014] 2. The light source can emit dual-wavelength light, and the difference in absorbance between the two wavelengths is linearly related to the concentration. Therefore, dual-wavelength light detection can effectively eliminate interference from organic matter and some other metal ions.

[0015] 3. A light source intensity monitoring channel is provided on one side of the optical channel located at the light source, and a monitoring receiver is provided at the end of the light source intensity monitoring channel, so that the light intensity emitted by the light source can be monitored in real time, thereby effectively eliminating the influence of factors such as ambient temperature changes and light source attenuation on the detection results of the equipment.

[0016] 4. When the control valve is opened, the water ejector assembly generates negative pressure through the principle of jet, so that the water sample enters the water channel for detection by using the pressure difference. When the valve is closed, the compressed air discharges the water sample in the water channel through the connecting pipe, and the compressed air also enters the water along the water channel and the filter. When the compressed air passes through, it can blow away the stains on the light-transmitting plug and the filter, thereby realizing automatic cleaning of the filter and the light-transmitting plug.

[0017] 5. During the entire testing process, water samples do not require pretreatment and reagents do not need to be added, so no secondary pollution will occur. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the utility model.

[0019] Figure 2 It is a schematic diagram of the utility model.

[0020] Figure 3 It is a cross-sectional view of the water channel in the utility model.

[0021] Figure 4 It is a cross-sectional view of the optical channel in the utility model.

[0022] Figure numerals: water channel-a, light channel-b, light source intensity monitoring channel-c, shell-1, frame-1a, upper cover-1b, mounting joint-1c, filter-2, connector-3, light-transmitting plug-4, receiver-5, light source-6, lens-7, filter-8, monitoring receiver-9, compression pipeline-10, water injector-11, connecting pipeline-12, control valve-13, light mounting bracket-14, receiving mounting bracket-15, output pipeline-16. DETAILED DESCRIPTION

[0023] The present invention will be further described below by way of embodiments and in conjunction with the accompanying drawings:

[0024] like Figure 1-Figure 4 As shown, a nitric nitrogen concentration detection device with automatic water sample filtering function is mainly composed of a housing 1, a filter 2, a connector 3, a light-transmitting plug 4, a receiver 5, a light source 6 and a water ejector assembly. The housing 1 is immersed in water for detecting water samples, a filter 2 for filtering water samples is arranged on the left side of the housing 1, a connector 3 is arranged on the right side of the housing 1, and the filter 2 and the connector 3 are connected through a water channel a arranged inside the housing 1 extending left and right.

[0025] In order to detect the water sample in the water channel, an optical channel b for light to pass through is provided in the housing 1 extending forward and backward, and the optical channel b passes through the water channel a. At the same time, a receiver 5 for receiving light waves is provided at the front end of the optical channel b, and a light source 6 for alternately emitting dual-wavelength light is provided at the rear end of the optical channel b. In order to prevent water from entering the optical channel, a light-transmitting plug 4 with a light-transmitting function is provided at the position where the optical channel b contacts the water channel a. The light-transmitting plug 4 is used to prevent water from entering the optical channel.

[0026] In order to allow water to enter the water channel, a water ejector assembly for allowing water samples to enter and exit the water channel is connected to the connector 3. The water ejector assembly includes a water ejector 11, a compression pipeline 10 for allowing compressed air to be input is connected to the air inlet of the water ejector 11, a liquid suction port of the water ejector 11 is connected to the connector 3 through a connecting pipeline 12, an output pipeline 16 for allowing compressed air or a gas-water mixture to be output is connected to the mixing outlet of the water ejector 11, and a control valve 13 for controlling the on-off of the pipeline is provided on the output pipeline 16. When the water sample enters the water channel, the control valve is opened, and the water ejector assembly generates negative pressure through the principle of jet flow, so that the water sample enters the water channel using the pressure difference, and then the nitric nitrogen of the water sample is tested. After the test is completed, the control valve is closed, so that compressed air enters the water channel through the connecting pipeline, forcing the water sample to leave the water channel. When the compressed air passes through, the stains on the light-transmitting plug and the filter can be blown off, thereby achieving automatic cleaning of the filter and the light-transmitting plug.

[0027] In order to focus the light intensity, a lens 7 is arranged near the rear end of the light channel b. In order to reduce the interference of stray light, a filter 8 is arranged near the front end of the light channel b. Preferably, the lens is arranged at the rear side of the light-transmitting plug on the corresponding side, and the filter is arranged at the front side of the light-transmitting plug on the corresponding side.

[0028] In order to reduce the impact of environmental temperature changes and light source attenuation on the detection results of the equipment, a light source intensity monitoring channel c for light to pass through is set near the rear end of the optical channel b, and a monitoring receiver 9 is set at the end of the light source intensity monitoring channel.

[0029] The light source 6 includes a control module arranged in the housing 1 and used for switching the wavelength of light, and a lamp bead arranged at the rear end of the optical channel through an optical mounting bracket 14. The receiver 5 includes a receiving module arranged at the front end of the optical channel through a receiving mounting bracket 15 and a processing module arranged in the housing. The monitoring receiver also includes a receiving module and a processing module, and the processing module of the monitoring receiver is shared with the processing module of the receiver. To facilitate the installation of the processing module and the control module, the processing module and the control module are arranged in the housing with upper and lower intervals, and a mounting column is arranged at the lower end of the inner side of the housing against the wall. The processing module and the control module are both fixed by bolts, and a nut is arranged in the middle of the bolts located at the processing module and the control module, and the nut is used to adjust the distance between the processing module and the control module.

[0030] In order to facilitate the detection of the nitrate-nitrogen content in water, the present application is also equipped with a display part for displaying the measured nitrate-nitrogen concentration, and the display part is connected to the receiver through a cable. At the same time, in order to facilitate the operation of the analyzer, it is also equipped with a control part, and the control part is electrically connected to the display part, the receiver, the monitoring receiver, the light source and the control valve. The control part is used to realize the opening and closing of the control valve and the switching of the light source. The control part can adopt the structure of the power supply part in the prior art. The control part and the display part are preferably set on the ground nearby, rather than in the detection water body.

[0031] To facilitate the installation of various components in the housing, the housing 1 includes a frame 1a and an upper cover 1b disposed on the frame 1a. A sealing ring is disposed between the frame 1a and the upper cover 1b. To facilitate the passage of the connected cables, a cable hole for the cables to pass through is disposed on the upper cover 1b. Since the housing is submerged in water, in order to facilitate the placement depth of the housing, a mounting joint 1c for fixing the analyzer placed in the water is disposed on the upper cover 1b. A cable through hole for the cables to pass through is disposed in the mounting joint 1c, and the mounting joint 1c is equipped with a fixing rod (not shown in the figure). Preferably, the upper cover 1b is flush with the upper end of the frame 1a after installation, that is, the upper cover is embedded in the frame.

[0032] During processing, in order to facilitate the processing of the light channel, a processing hole can be opened outside the shell first, and after the processing is completed, the processing hole can be blocked. The blocking of the processing hole can be welding or plugging. Preferably, the filter uses a titanium rod sintered filter element, the light-transmitting plug is made of quartz material, and all joints are waterproof joints.

[0033] When using this analyzer, immerse the shell in water. During detection, the control module controls the lamp beads to emit ultraviolet light with wavelengths of 220nm and 275nm respectively, and then the emitted ultraviolet light passes through the lens, light-transmitting plug, water sample, light-transmitting plug, and filter along the optical channel in sequence and is received by the receiving module. Then the processing module analyzes the light intensity received by the receiving module after passing through the water sample and the light intensity received by the monitoring receiver, and calculates the absorbance of the water sample, thereby obtaining the nitrate nitrogen content in the water sample.

Claims

1. A nitric nitrogen concentration detection device with automatic water sample filtering function, characterized in that: The invention comprises a shell (1) immersed in water, wherein a filter (2) is arranged on the left side of the shell (1), a connector (3) is arranged on the right side of the shell (1), and the filter (2) and the connector (3) are connected through a water channel (a) arranged inside the shell (1) and extending left and right, and a water ejector assembly for enabling water samples to enter and exit the water channel is connected to the connector (3), and an optical channel (b) for allowing light to pass is arranged in a forward and backward manner inside the shell (1), and the optical channel (b) passes through the water channel (a), and a light-transmitting plug (4) for preventing water samples from entering the optical channel and having a light-transmitting function is arranged at a position where the optical channel (b) contacts the water channel (a), a receiver (5) for receiving light waves is arranged at the front end of the optical channel (b), and a light source (6) for alternately emitting dual-wavelength light is arranged at the rear end of the optical channel (b).

2. The nitric nitrogen concentration detection device with automatic water sample filtering function according to claim 1, characterized in that: A lens (7) is arranged at a position close to the rear end of the optical channel (b), and a filter (8) is arranged at a position close to the front end of the optical channel (b).

3. The nitric nitrogen concentration detection device with automatic water sample filtering function according to claim 1, characterized in that: A light source intensity monitoring channel (c) for light to pass through is arranged at a position close to the rear end of the light channel (b), and a monitoring receiver (9) is arranged at the end of the light source intensity monitoring channel.

4. The nitric nitrogen concentration detection device with automatic water sample filtering function according to claim 1, characterized in that: The housing (1) comprises a frame (1a) and an upper cover (1b) arranged on the frame (1a), and a sealing ring is arranged between the frame (1a) and the upper cover (1b).

5. The nitric nitrogen concentration detection device with automatic water sample filtering function according to claim 4, characterized in that: The upper cover (1b) is provided with a mounting joint (1c) for fixing the analyzer placed in water, and the mounting joint (1c) is equipped with a fixing rod.

6. The nitric nitrogen concentration detection device with automatic water sample filtering function according to claim 1, characterized in that: The water ejector assembly comprises a water ejector (11), the air inlet of the water ejector (11) is connected to a compression pipeline (10) for realizing compressed air input, the liquid suction port of the water ejector (11) is connected to a connector (3) via a connecting pipeline (12), the mixing outlet of the water ejector (11) is connected to an output pipeline (16) for realizing compressed air or air-water mixed liquid output, and the output pipeline (16) is provided with a control valve (13) for controlling the on-off of the pipeline.

7. The nitric nitrogen concentration detection device with automatic water sample filtering function according to claim 6, characterized in that: It is also equipped with a display part for displaying the measured nitric nitrogen concentration and facilitating observation, and the display part is connected to the receiver through a cable; it is also equipped with a control part, and the control part is electrically connected to the display part, the receiver, the monitoring receiver, the light source and the control valve, and the control part is used to realize the opening and closing of the control valve and the switching of the light source.

8. The nitric nitrogen concentration detection device with automatic water sample filtering function according to claim 1, characterized in that: The light source (6) comprises a control module arranged in the housing (1) and used for switching the wavelength of light, and a lamp bead arranged at the rear end of the light channel via an optical mounting bracket (14); the receiver (5) comprises a receiving module arranged at the front end of the light channel via a receiving mounting bracket (15) and a processing module arranged in the housing.

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