Quantitative water sample extraction mechanism and COD analyzer containing the same

Abstract

The utility model discloses a kind of quantitative water sample extraction mechanism and the COD analyzer containing the mechanism, it is related to COD analyzer technical field, including fixed plate and controller, the lower end of fixed plate is equipped with left and right moving mechanism, left and right moving mechanism is equipped with front and rear moving component, front and rear moving component connects fixed block, fixed block is equipped with lifting component, lifting component connects extraction box, extraction box is equipped with extraction module, extraction box connects cleaning assembly;Through the synergistic effect of left and right moving mechanism, front and rear moving component and lifting component, the accurate movement of extraction module in three-dimensional space is realized, accurately positioned to the position of water sample test tube, improve the accuracy and automation of water sample extraction;Through extraction module, quantitative extraction of water sample is realized, the accuracy of extraction amount is ensured, improve the reliability of detection result;Through cleaning assembly, cross contamination between water sample is avoided, improve the precision and reliability of detection, facilitate the maintenance and maintenance of equipment.

Description

Technical Field

[0001] This utility model relates to the field of COD analyzer technology, specifically a quantitative water sample extraction mechanism and a COD analyzer containing the mechanism. Background Technology

[0002] As people's environmental awareness continues to increase, they are becoming more and more strict in protecting water resources. Wastewater needs to be treated before being discharged, and the treated wastewater needs to be tested. COD is a commonly used test parameter. Only when the parameter is qualified can it be discharged. Currently, COD measurement is mostly carried out using COD analyzers.

[0003] However, existing COD analyzers require manual reagent addition, which is not only inefficient but also inaccurate. After each test, staff need to clean the test tubes, which is inconvenient.

[0004] Based on this, a quantitative water sample extraction mechanism and a COD analyzer containing the mechanism are provided, which can eliminate the drawbacks of existing devices. Utility Model Content

[0005] The purpose of this invention is to provide a quantitative water sample extraction mechanism and a COD analyzer containing the mechanism, so as to solve the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A quantitative water sample extraction mechanism includes a fixed plate and a controller. The lower end of the fixed plate is provided with a left-right moving mechanism. The left-right moving mechanism is provided with a front-back moving component. The front-back moving component is connected to a fixed block. The fixed block is provided with a lifting component. The lifting component is connected to an extraction box. The extraction box is provided with an extraction module. The extraction box is connected to a cleaning component.

[0007] Based on the above technical solutions, this utility model also provides the following optional technical solutions: In one alternative embodiment: the left and right moving mechanism includes two mounting plates, which are fixedly connected to the lower end of a fixed plate. A threaded rod is rotatably connected between the two mounting plates. The threaded rod is threadedly connected to a moving block. One end of the moving block is rotatably connected to an interlaced helical gear. The interlaced helical gear is keyed to a rotating rod, which is rotatably connected to the two mounting plates. The end of the moving block away from the interlaced helical gear is slidably connected to a limiting rod, which is fixedly connected to the two mounting plates. The threaded rod is fixedly connected to a motor, which is fixedly connected to the mounting plate.

[0008] In one alternative embodiment: the forward and backward moving component includes a slider, which is slidably connected to a corresponding groove on the upper end of a moving block. The slider is threadedly connected to a threaded rod II, which is rotatably connected to the moving block. One end of the threaded rod II is fixedly connected to an interlocking helical gear II, which meshes with an interlocking helical gear I. One end of the rotating rod is fixedly connected to a motor II, which is fixedly connected to a mounting plate. The slider is fixedly connected to a fixed block.

[0009] In one alternative embodiment: the lifting component includes a mounting block, which is slidably connected to a corresponding groove on a fixed block, the mounting block is fixedly connected to the extraction box, the mounting block is fixedly connected to the output end of a telescopic rod, and the telescopic rod is fixedly connected to the fixed block.

[0010] In one alternative embodiment: the extraction module includes five extraction tubes, which are fixedly connected in an extraction box. The lower end of each extraction tube is fixedly connected to a suction nozzle. A piston is slidably connected in each extraction tube. One end of a connecting rod is fixedly connected to the piston. The other end of the connecting rod is fixedly connected to a connecting plate. The connecting plate is fixedly connected to the output end of a second telescopic rod, which is fixedly connected in the extraction box.

[0011] In one alternative: the cleaning assembly includes a clean water tank, which is fixedly connected to the upper end of a fixed plate. The outlet of the clean water tank is connected to the input of a water pump via a water pipe. The output of the water pump is connected to a water supply pipe via a flexible water pipe. The water supply pipe is connected to five extraction pipes respectively, and a solenoid valve is provided at each connection point between the water supply pipe and the five extraction pipes.

[0012] In one alternative: the controller is electrically connected to motor one, motor two, telescopic rod two, water pump and solenoid valve respectively.

[0013] A COD analyzer includes a housing and the aforementioned quantitative water sample extraction mechanism. The quantitative water sample extraction mechanism is fixedly connected to the upper inner surface of the housing, and the controller is fixedly connected to the outer end of the housing. A limiting groove is provided on the lower inner surface of the housing, and a test tube rack is slidably connected in the limiting groove. Water sample test tubes are provided on the test tube rack. A fixing box is fixedly connected to the lower inner surface of the housing. The fixing box is provided with a reagent tank, an observation tank, and a wastewater tank. The wastewater tank is connected to a wastewater container through a water pipe. A digestion tank is provided on the lower inner surface of the housing.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention achieves precise movement of the extraction module in three-dimensional space through the coordinated action of left-right moving mechanisms, front-back moving components, and lifting components. This allows for accurate positioning of the water sample tube, improving the accuracy and automation of water sample extraction. The extension rod in the extraction module drives the piston to move up and down within the extraction tube, enabling quantitative extraction of the water sample and ensuring accurate extraction volume, thereby improving the reliability of COD detection results. The cleaning assembly uses a water pump and solenoid valve to control the cleaning of the extraction tube, observation tank, and digestion tank with clean water, preventing cross-contamination between water samples, improving detection accuracy and reliability, and facilitating equipment maintenance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the quantitative water sample extraction mechanism of this utility model.

[0016] Figure 2 This is a schematic diagram of the left and right moving mechanism of this utility model.

[0017] Figure 3 This is a schematic diagram of the structure of the solenoid valve of this utility model.

[0018] Figure 4 This is a schematic diagram of the extraction module of this utility model.

[0019] Figure 5 This is a schematic diagram of the COD analyzer of this utility model.

[0020] Figure reference numerals: 100, Fixing plate; 101, Fixing block; 102, Extraction box; 103, Controller; 201, Mounting plate; 202, Threaded rod one; 203, Moving block; 204, Alternating helical gear one; 205, Rotating rod; 206, Limiting rod; 207, Motor one; 301, Sliding block; 302, Threaded rod two; 303, Alternating helical gear two; 304, Motor two; 401, Extraction tube; 402, Suction nozzle; 403, Movable... Plug, 404, Connecting rod, 405, Connecting plate, 406, Telescopic rod two, 501, Clean water tank, 502, Water pump, 503, Water supply pipe, 504, Solenoid valve, 601, Mounting block, 602, Telescopic rod one, 701, Outer shell, 702, Limiting groove, 703, Test tube rack, 704, Water sample test tube, 705, Fixing box, 706, Reagent tank, 707, Wastewater tank, 708, Wastewater tank, 709, Digestion tank, 710, Observation tank. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0022] In one embodiment, such as Figures 1-5 As shown, a quantitative water sample extraction mechanism includes a fixed plate 100 and a controller 103. The lower end of the fixed plate 100 is provided with a left-right moving mechanism, which is equipped with a front-back moving component. The front-back moving component is connected to a fixed block 101, and the fixed block 101 is equipped with a lifting component. The lifting component is connected to an extraction box 102, which contains an extraction module. The extraction box 102 is connected to a cleaning component. Through the coordinated action of the left-right moving mechanism, the front-back moving component, and the lifting component, the extraction module achieves precise movement in three-dimensional space, accurately locating the water sample tube and improving the accuracy and automation of water sample extraction. The extraction module enables quantitative extraction of water samples, ensuring the accuracy of the extraction volume and thus improving the reliability of COD detection results. The cleaning component avoids cross-contamination between water samples, improving the accuracy and reliability of detection, and also facilitating equipment maintenance.

[0023] In this embodiment, as Figure 2 As shown, the left and right moving mechanism includes two mounting plates 201, which are fixedly connected to the lower end of the fixed plate 100. A threaded rod 202 is rotatably connected between the two mounting plates 201. The threaded rod 202 is threadedly connected to a moving block 203. One end of the moving block 203 is rotatably connected to an interlaced helical gear 204. The interlaced helical gear 204 is keyed to a rotating rod 205. The rotating rod 205 is rotatably connected to the two mounting plates 201. The moving block 203 is located away from the interlaced helical gear 204. One end of 04 is slidably connected to a limiting rod 206, which is fixedly connected to two mounting plates 201. The threaded rod 202 is fixedly connected to a motor 207, which is fixedly connected to the mounting plate 201. When the motor 207 rotates, it drives the threaded rod 202 to rotate. The threaded rod 202 drives the moving block 203 to move along the direction of the limiting rod 206. The interlaced helical gear 204 slides along the outer end of the rotating rod 205 with the moving block 203, thus completing the adjustment of the left and right positions of the extraction module.

[0024] In one embodiment, such as Figure 2As shown, the forward and backward moving component includes a slider 301, which is slidably connected to a corresponding groove on the upper end of the moving block 203. The slider 301 is threadedly connected to a threaded rod 302, which is rotatably connected to the moving block 203. One end of the threaded rod 302 is fixedly connected to a staggered helical gear 303, which meshes with a staggered helical gear 204. One end of the rotating rod 205 is fixedly connected to a motor 304, which is fixedly connected to the mounting plate 201. The slider 301 is fixedly connected to the fixed block 101. When the motor 304 rotates, it drives the rotating rod 205 to rotate. The rotating rod 205 drives the staggered helical gear 204 to rotate, which in turn drives the staggered helical gear 303 to rotate. The staggered helical gear 303 drives the threaded rod 302 to rotate, and the threaded rod 302 drives the slider 301 to move, thus adjusting the forward and backward position of the extraction module.

[0025] In one embodiment, such as Figure 2 As shown, the lifting component includes a mounting block 601, which is slidably connected to a corresponding groove on the fixed block 101. The mounting block 601 is fixedly connected to the extraction box 102. The output end of the telescopic rod 602 is fixedly connected to the mounting block 601. The telescopic rod 602 is fixedly connected to the fixed block 101. The telescopic rod 602 extends or retracts from the output rod, driving the mounting block 601 to move up and down, thereby driving the extraction module to insert and remove the test tube.

[0026] In one embodiment, such as Figure 3 and Figure 4 As shown, the extraction module includes five extraction tubes 401, which are fixedly connected in the extraction box 102. The lower end of each extraction tube 401 is fixedly connected to a suction nozzle 402. A piston 403 is slidably connected within each extraction tube 401. One end of a connecting rod 404 is fixedly connected to the piston 403, and the other end of the connecting rod 404 is fixedly connected to a connecting plate 405. The connecting plate 405 is fixedly connected to the output end of a telescopic rod 406, which is fixedly connected in the extraction box 102. The suction nozzle 402... 2. Insert the telescopic rod 406 into the test tube containing the water sample. The telescopic rod 406 retracts its output rod, causing the connecting plate 405 to move upward. The connecting plate 405 then causes the connecting rod 404 to move upward, and the connecting rod 404 causes the piston 403 to move upward, drawing the water sample into the extraction tube 401. Insert the suction nozzle 402 into the digestion tank. The telescopic rod 406 extends its output rod, causing the connecting plate 405 to move downward. The connecting plate 405 then causes the connecting rod 404 to move downward, and the connecting rod 404 causes the piston 403 to move downward, squeezing the water sample into the digestion tank for digestion.

[0027] In one embodiment, such as Figure 1 and Figure 3 As shown, the cleaning assembly includes a clean water tank 501, which is fixedly connected to the upper end of the fixing plate 100. The outlet of the clean water tank 501 is connected to the input of the water pump 502 via a water pipe. The output of the water pump 502 is connected to the water supply pipe 503 via a soft water pipe. The water supply pipe 503 is connected to five extraction pipes 401 respectively. Solenoid valves 504 are respectively installed at the connection points of the water supply pipe 503 and the five extraction pipes 401. When cleaning is required, the water sample after testing is first extracted into the wastewater tank 707. The solenoid valves 504 are opened, and the water pump 502 draws the clean water in the clean water tank 501 into the extraction pipes 401, which are then added to the observation tank 710 and the digestion tank 709 for rinsing. The rinsed wastewater is then drawn back into the wastewater tank 707. This process is repeated multiple times to ensure the cleanliness of the extraction pipes 401, the observation tank 710, and the digestion tank 709.

[0028] In one embodiment, such as Figure 5 As shown, the controller 103 is electrically connected to motor 207, motor 304, telescopic rod 406, water pump 502 and solenoid valve 504 respectively. The controller 103 adopts an industrial-grade MCU controller to coordinate the start and stop sequence of motor 207, motor 304, telescopic rod 406, water pump 502 and solenoid valve 504 to realize linkage control.

[0029] In one embodiment, such as Figure 5As shown, a COD analyzer includes a housing 701, characterized in that it further includes a quantitative water sample extraction mechanism, which is fixedly connected to the upper inner surface of the housing 701. A controller 103 is fixedly connected to the outer end of the housing 701. A limiting groove 702 is provided on the lower inner surface of the housing 701, and a test tube rack 703 is slidably connected in the limiting groove 702. Water sample test tubes 704 are provided on the test tube rack 703. A fixing box 7 is fixedly connected to the lower inner surface of the housing 701. 05. The fixed box 705 is equipped with a reagent tank 706, an observation tank 710, and a wastewater tank 707. The wastewater tank 707 is connected to a wastewater container 708 via a water pipe. The lower end face of the inner shell 701 is provided with a digestion tank 709. A water sample tube 704 containing a water sample is inserted into a test tube rack 703. The test tube rack 703 is pushed into the outer shell 701 along the limiting groove 702, thus fixing the position of the water sample tube 704. The synergistic action of the left-right moving mechanism, the front-back moving parts, and the lifting components, according to... The pre-programmed sequence in controller 103 drives the extraction module to accurately position itself in the water sample tube, extracting the water sample into digestion tank 709. The extraction module then moves to the upper end of reagent tank 706, extracting the test reagent into digestion tank 709. A wiping cotton swab can be provided at the inlet of reagent tank 706 to clean the outer end of suction nozzle 402. Digestion in digestion tank 709 is performed at 165°C for 15 minutes using a heating unit. The heating unit includes a heating jacket and a temperature sensor. Heating unit technology is existing and well-known to those skilled in the art, so it will not be described in detail here. After cooling to room temperature, the digested solution is extracted into observation tank 710 by the extraction module and tested by a detection unit. The detection unit includes a spectrophotometer, which measures absorbance at a specific wavelength. Based on the relationship between absorbance and concentration, the COD value is calculated. Detection unit technology is existing and well-known to those skilled in the art, so it will not be described in detail here.

[0030] The above embodiments disclose a quantitative water sample extraction mechanism and a COD analyzer containing the mechanism. The working principle is as follows: a water sample tube 704 containing the water sample is inserted into a test tube rack 703. The test tube rack 703 is pushed into the outer casing 701 along the limiting groove 702, fixing the position of the water sample tube 704. According to the pre-programmed sequence in the controller 103, motor 207 rotates, driving threaded rod 202 to rotate. Threaded rod 202 drives moving block 203 to move along the direction of limiting rod 206. Alternating helical gear 204 moves along the direction of moving block 203 as it rotates. The outer end of rod 205 slides, motor 2 304 rotates, driving the rotating rod 205 to rotate. The rotating rod 205 drives the first interlaced helical gear 204 to rotate, which in turn drives the second interlaced helical gear 303 to rotate. The second interlaced helical gear 303 drives the second threaded rod 302 to rotate, which in turn drives the slider 301 to move, thereby moving the extraction tube 401 accurately to the position of the water sample test tube. The first telescopic rod 602 extends out of the output rod, driving the mounting block 601 to move downward, inserting the suction nozzle 402 into the test tube containing the water sample. The second telescopic rod 406 retracts out of the output rod. The rod drives the connecting plate 405 to move upward, which in turn drives the connecting rod 404 to move upward. The connecting rod 404 then drives the piston 403 to move upward, drawing the water sample into the extraction tube 401. The extraction tube 401 then moves to the digestion tank 709, drawing the water sample into the digestion tank 709. The extraction module then moves to the upper end of the reagent tank 706, drawing the test reagent into the digestion tank 709. The inlet of the reagent tank 706 can be equipped with a wiping cotton to clean the outer end of the suction nozzle 402. The digestion tank 709 is then digested at 165°C for 15 minutes by a heating unit. The heating unit includes a heating jacket and a temperature sensor. The heating unit is existing technology and is well known to those skilled in the art, so it will not be described in detail here. After cooling to room temperature, the digested solution is extracted into the observation tank 710 by the extraction module and detected by the detection unit. The detection unit includes a spectrophotometer. The spectrophotometer measures the absorbance at a specific wavelength, and the COD value is calculated based on the relationship between absorbance and concentration. The detection unit is existing technology and is well known to those skilled in the art, so it will not be described in detail here.

[0031] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A quantitative water sample extraction mechanism, comprising a fixed plate (100) and a controller (103), characterized in that, The lower end of the fixed plate (100) is provided with a left and right moving mechanism, and the left and right moving mechanism is provided with a front and back moving component. The front and back moving component is connected to the fixed block (101). The fixed block (101) is provided with a lifting component. The lifting component is connected to the extraction box (102). The extraction box (102) is provided with an extraction module. The extraction box (102) is connected to the cleaning component.

2. The quantitative water sample extraction mechanism according to claim 1, characterized in that, The left and right moving mechanism includes two mounting plates (201), which are fixedly connected to the lower end of the fixed plate (100). A threaded rod (202) is rotatably connected between the two mounting plates (201). The threaded rod (202) is threadedly connected to a moving block (203). One end of the moving block (203) is rotatably connected to an interlaced helical gear (204). The interlaced helical gear (204) is keyed to a rotating rod (205). The rotating rod (205) is rotatably connected to the two mounting plates (201). The end of the moving block (203) away from the interlaced helical gear (204) is slidably connected to a limiting rod (206). The limiting rod (206) is fixedly connected to the two mounting plates (201). The threaded rod (202) is fixedly connected to a motor (207). The motor (207) is fixedly connected to the mounting plate (201).

3. The quantitative water sample extraction mechanism according to claim 2, characterized in that, The forward and backward moving component includes a slider (301), which is slidably connected to a corresponding groove on the upper end of the moving block (203). The slider (301) is threadedly connected to a threaded rod (302), which is rotatably connected to the moving block (203). One end of the threaded rod (302) is fixedly connected to a staggered helical gear (303), which meshes with a staggered helical gear (204). One end of the rotating rod (205) is fixedly connected to a motor (304), which is fixedly connected to the mounting plate (201). The slider (301) is fixedly connected to the fixed block (101).

4. The quantitative water sample extraction mechanism according to claim 1, characterized in that, The lifting component includes a mounting block (601), which is slidably connected in a corresponding groove on the fixed block (101). The mounting block (601) is fixedly connected to the extraction box (102), and the mounting block (601) is fixedly connected to the output end of the telescopic rod (602). The telescopic rod (602) is fixedly connected to the fixed block (101).

5. A quantitative water sample extraction mechanism according to claim 3, characterized in that, The extraction module includes five extraction tubes (401), which are fixedly connected in the extraction box (102). The lower end of each extraction tube (401) is fixedly connected to a suction nozzle (402). A piston (403) is slidably connected in each extraction tube (401). One end of a connecting rod (404) is fixedly connected to the piston (403). The other end of the connecting rod (404) is fixedly connected to a connecting plate (405). The output end of a telescopic rod (406) is fixedly connected to the connecting plate (405). The telescopic rod (406) is fixedly connected in the extraction box (102).

6. The quantitative water sample extraction mechanism according to claim 5, characterized in that, The cleaning assembly includes a clean water tank (501), which is fixedly connected to the upper end of the fixed plate (100). The water outlet of the clean water tank (501) is connected to the input end of the water pump (502) through a water pipe. The output end of the water pump (502) is connected to the water supply pipe (503) through a soft water pipe. The water supply pipe (503) is connected to five extraction pipes (401) respectively. Solenoid valves (504) are provided at the connection points between the water supply pipe (503) and the five extraction pipes (401).

7. A quantitative water sample extraction mechanism according to claim 6, characterized in that, The controller (103) is electrically connected to motor one (207), motor two (304), telescopic rod two (406), water pump (502) and solenoid valve (504) respectively.

8. A COD analyzer, comprising a housing (701), characterized in that, It also includes the quantitative water sample extraction mechanism described in any one of claims 1-7 above, wherein the quantitative water sample extraction mechanism is fixedly connected to the upper end face inside the shell (701), the controller (103) is fixedly connected to the outer end of the shell (701), the lower end face inside the shell (701) is provided with a limiting groove (702), a test tube rack (703) is slidably connected in the limiting groove (702), a water sample test tube (704) is provided on the test tube rack (703), a fixing box (705) is fixedly connected to the lower end face inside the shell (701), a reagent tank (706), an observation tank (710) and a wastewater tank (707) are provided in the fixing box (705), the wastewater tank (707) is connected to a wastewater tank (708) through a water pipe, and a digestion tank (709) is provided on the lower end face inside the shell (701).

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