An apparatus for verifying and calibrating a dissolved oxygen analyzer used for measuring dissolved oxygen in water bodies or liquids

Abstract

The present invention belongs to the technical field of dissolved oxygen measurement, and discloses a calibration device for a dissolved oxygen analyzer used to measure dissolved oxygen in water bodies or liquids. The device includes an analyzer, a connecting line is arranged on one side of the analyzer, a detection probe is arranged at one end of the connecting line, a storage tank is arranged on one side of the analyzer and on the side of the connecting line, a fixing frame is arranged on the front side of the storage tank, a support block is fixedly installed at the top of one side of the fixing frame, one end of the connecting line is located at the bottom of the support block, a storage tank is arranged on the front side of the fixing frame, a placement seat is arranged at the bottom of the storage tank, and a connecting pipe is fixedly installed on one side of the storage tank. By supporting and fixing both the upper and lower ends of the detection probe, the stability of the detection probe is improved, and when adjusting the placement position and depth of the detection probe, the probe is not placed stably and shakes, which may lead to unstable detection signals and affect the measurement results, facilitating the improvement of the accuracy and precision of the calibration of the detection probe.

Description

Technical Field

[0001] The present invention belongs to the technical field of dissolved oxygen measurement, and particularly relates to a verification and calibration device for a dissolved oxygen analyzer used to measure dissolved oxygen in water bodies or liquids. Background Art

[0002] A dissolved oxygen analyzer is an instrument used to measure the concentration of dissolved oxygen in water bodies or liquids. In the fields of environmental protection, aquaculture, ecological research, etc., the application of dissolved oxygen analyzers is very extensive. However, due to the influence of various factors, such as temperature, salinity, pressure, water flow and other factors, after long-term use, the dissolved oxygen analyzer may have a large error, so it needs to be calibrated regularly to ensure its accuracy and reliability.

[0003] In the prior art, when measuring a water body or liquid through a detection probe, the placement depth of the probe needs to be determined according to actual needs, and multiple detections are carried out at different depths. When adjusting the placement position and depth of the detection probe, the probe placement is unstable and prone to shaking, which will lead to unstable detection signals, affect the measurement results, and is not conducive to improving the accuracy and precision of the calibration of the detection probe. Summary of the Invention

[0004] In view of the problems in the prior art, the present invention proposes the following technical solution: A verification and calibration device for a dissolved oxygen analyzer used to measure dissolved oxygen in water bodies or liquids, including an analyzer, a connecting wire is arranged on one side of the analyzer, a detection probe is arranged at one end of the connecting wire, a storage tank is arranged on one side of the analyzer and on the side of the connecting wire, a fixing frame is arranged on the front side of the storage tank, a support block is fixedly installed at the top of one side of the fixing frame, one end of the connecting wire is located at the bottom of the support block, a storage tank is arranged on the front side of the fixing frame, a placement seat is arranged at the bottom of the storage tank, a connecting pipe is fixedly installed on one side of the storage tank, a control valve is arranged at one end of the connecting pipe, and the other end of the connecting pipe is located inside the storage tank, an installation ring is fixedly installed at one end of the detection probe, an annular groove is formed at the bottom of the installation ring, a movable rod is movably connected inside the annular groove, an installation block is fixedly installed at one end of the movable rod, the inner wall of the installation block is rotationally connected with the outer side of the detection probe, a groove is formed in the middle of the installation block, a movable block is slidably connected to the inner wall of the groove, a connecting block is fixedly installed at the bottom of the movable block, a first electric push rod is fixedly installed at the bottom of the connecting block and the inner wall of the bottom of the groove, both ends of the top of the movable block are hinged with a rotating plate, one end of the rotating plate is hinged with a fixed baffle, moving grooves are formed on both sides at the top end of the installation block, both sides of the fixed baffle are rotationally connected with the inner wall of the moving groove, and a moving structure is arranged on one side of the first electric push rod and outside the bottom end of the installation block.

[0005] Preferably, as the above technical solution, an oxygen solution is provided inside the storage tank, a photoelectric detection module is provided inside the detection probe, the detection probe passes through the middle of one side of the fixing frame and extends to the inside of the storage tank, and a protective cover is provided at the bottom of the detection probe and located on the moving structure.

[0006] Preferably, as the above technical solution, both the fixed baffle and the rotating plate are symmetrically arranged with the center of the moving block. An installation groove is formed at the bottom of the fixed baffle, a second electric push rod is fixedly installed inside the installation groove, a fixed clamping block is fixedly installed at one end of the second electric push rod, the fixed clamping block is located inside the installation groove, and a clamping groove is formed on one side thereof.

[0007] Preferably, as the above technical solution, the moving structure includes a first rack, one side of the first rack is fixedly installed with a connecting block, a gear is meshed with one side of the first rack, a rotating rod is fixedly installed in the middle of the gear, a second rack is meshed with one side of the gear, a protective cover is fixedly installed on one side of the second rack, a fixed groove is formed at the bottom of the protective cover, an electric telescopic rod is fixedly installed inside the fixed groove, and a support ring is fixedly installed at one end of the electric telescopic rod.

[0008] Preferably, as the above technical solution, the protective cover is located at the bottom end of the installation block, the first rack, the gear, and the second rack are located between the protective cover and the first electric push rod, the support ring is located inside the fixed groove, and the first rack, the gear, the rotating rod, the second rack, the electric telescopic rod, and the support ring are all symmetrically arranged with the center of the installation block.

[0009] Preferably, as the above technical solution, first magnetic blocks are fixedly installed on both sides in the middle of the second rack, the first magnetic blocks are located on both sides of the gear, a moving port is formed at the bottom of the second rack and on the inner wall of the bottom of the groove, and two second magnetic blocks are fixedly installed on the inner wall of one side of the moving port, and the first magnetic blocks are magnetically connected to the second magnetic blocks.

[0010] Preferably, as the above technical solution, fixing plates are rotatably connected to both sides of the rotating rod, the bottom of the fixing plates is fixedly installed on the inner wall of the groove, limiting grooves are formed on both inner walls of the protective cover, limiting blocks are slidably connected inside the limiting grooves, the limiting blocks are located below the groove, and one side of the limiting blocks is fixedly installed on the outer wall of the bottom end of the installation block.

[0011] Preferably, as the above technical solution, the protective cover is threadedly connected to the outside of the protective housing. An installation port is formed in the middle of the protective cover, a moving plate is arranged inside the installation port, a fixed rod is fixedly installed at the top of the moving plate, a cleaning block is fixedly installed at the top of the fixed rod, a pressing block is fixedly installed at the bottom of the moving plate, a telescopic rod is fixedly installed at the top of the pressing block, a sliding groove is formed at the top of the telescopic rod and at the bottom of the protective cover, and the top of the telescopic rod is slidably connected to the sliding groove.

[0012] As an optimization of the above technical solution, the pressing block is located at the bottom of the protective cover, the telescopic rods are symmetrically arranged on the left and right sides of the moving plate, the fixed rod and the cleaning block pass through the mounting opening and extend into the protective cover, compression springs are arranged on both sides of the fixed rod, one end of the compression spring is fixedly installed at the bottom of the cleaning block, and the other end thereof is fixedly installed at the top of the moving plate, and the cleaning block is correspondingly arranged opposite to the bottom of the detection probe.

[0013] The beneficial effects of the present invention are as follows:

[0014] (1) In the present invention, through the movement of the moving block, the rotating plate drives the fixed baffle to rotate, the fixed baffle is abutted against the inner wall of the storage tank, and the fixed clamping block is clamped at the top of the storage tank. At the same time, through the movement of the moving structure, the support ring moves to fit with the inner wall of the bottom of the storage tank, so that both the upper and lower ends of the detection probe are supported and fixed, improving the stability of the detection probe, preventing the probe from shaking unstably when adjusting the placement position and depth of the detection probe, resulting in unstable detection signals and affecting the measurement results, and facilitating improving the accuracy and precision of the calibration of the detection probe;

[0015] (2) In the present invention, through the movement of the moving structure, while the support ring supports and fixes the bottom of the detection probe, the protective cover can be moved to the bottom of the detection probe to shield it, facilitating preventing strong light from directly irradiating the probe during the detection process, avoiding interference with the optical signal detected by the photoelectric detection module inside the detection probe, and thus facilitating improving the accuracy of the measurement result;

[0016] (3) The present invention can protect the bottom of the detection probe and the protective cover through the protective cover. When the detection probe is not in use, it can prevent the detection probe from being damaged by impact. And by pressing and rotating the pressing block, the cleaning block can clean the bottom of the detection probe in contact, improving the cleanliness of the detection probe and preventing impurities from adhering and affecting the detection effect. Description of the Drawings

[0017] Figure 1 Shows the overall structural schematic diagram of the embodiment;

[0018] Figure 2 Shows the structural diagram of the detection probe of the embodiment;

[0019] Figure 3 Shows the sectional view of the detection probe of the embodiment;

[0020] Figure 4 Shows Figure 3 The enlarged view at A of

[0021] Figure 5 Shows the structural diagram of the fixed baffle, the rotating plate and the detection probe of the embodiment;

[0022] Figure 6 The figure shows the structural diagram of the embodiment of the mobile structure;

[0023] Figure 7 The figure shows the structural diagram between the embodiment of the protective cover and the first electric push rod;

[0024] Figure 8 The figure shows Figure 7 the enlarged view at position B of;

[0025] Figure 9 The figure shows the bottom structural diagram of the embodiment of the detection probe and the protective cover;

[0026] Figure 10 The figure shows the structural diagram of the embodiment of the protective cover.

[0027] In the figure: 1, measuring instrument; 2, connecting wire; 3, detection probe; 4, storage tank; 5, fixing frame; 6, support block; 7, storage tank; 8, placing seat; 9, connecting pipe; 10, mounting ring; 11, movable rod; 12, mounting block; 13, moving block; 14, connecting block; 15, first electric push rod; 16, rotating plate; 17, fixed baffle; 18, mobile structure; 181, first rack; 182, gear; 183, second rack; 184, protective cover; 185, electric telescopic rod; 186, support ring; 19, protective cover; 20, second electric push rod; 21, fixed clamping block; 22, first magnet; 23, second magnet; 24, fixing plate; 25, limiting block; 26, moving plate; 27, fixed rod; 28, cleaning block; 29, pressing block; 30, telescopic rod; 31, compression spring. Specific embodiments

[0028] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0029] The present invention provides a verification and calibration device for a dissolved oxygen measuring instrument used for measuring water bodies or liquids, as Figures 1 to 5As shown in the figure, it includes a measuring instrument 1. A connecting line 2 is arranged on one side of the measuring instrument 1. One end of the connecting line 2 is provided with a detection probe 3. A storage tank 4 is arranged on one side of the measuring instrument 1 and on the side of the connecting line 2. A fixing frame 5 is arranged on the front side of the storage tank 4. A support block 6 is fixedly installed at the top of one side of the fixing frame 5. One end of the connecting line 2 is located at the bottom of the support block 6. A storage tank 7 is arranged on the front side of the fixing frame 5. A placing seat 8 is arranged at the bottom of the storage tank 7. A connecting pipe 9 is fixedly installed on one side of the storage tank 4. One end of the connecting pipe 9 is provided with a control valve, and the other end is located inside the storage tank 7. One end of the detection probe 3 is fixedly installed with an installation ring 10. An annular groove is opened at the bottom of the installation ring 10. A movable rod 11 is movably connected inside the annular groove. One end of the movable rod 11 is fixedly installed with an installation block 12. A groove is opened in the middle of the installation block 12. A movable block 13 is slidably connected to the inner wall of the groove. A connecting block 14 is fixedly installed at the bottom of the movable block 13. A first electric push rod 15 is fixedly installed at the bottom of the connecting block 14 and the inner wall of the bottom of the groove. Both ends of the top of the movable block 13 are hinged with a rotating plate 16. One end of the rotating plate 16 is hinged with a fixed baffle 17. Moving grooves are opened on both sides of the top of the installation block 12. Both sides of the fixed baffle 17 are rotatably connected to the inner wall of the moving groove. A moving structure 18 is arranged on one side of the first electric push rod 15 and outside the bottom end of the installation block 12.

[0030] An oxygen solution is arranged inside the storage tank 4. A photoelectric detection module is arranged inside the detection probe 3. The detection probe 3 passes through the middle of one side of the fixing frame 5 and extends into the inside of the storage tank 7. A protective cover 19 is arranged at the bottom of the detection probe 3 and located at the moving structure 18.

[0031] By placing the solution to be measured in the storage tank 7, the oxygen solution inside the storage tank 4 enters the solution to be measured through the connecting pipe 9 by means of the control valve. Remove the protective cover 19, and then place the detection probe 3 inside the storage tank 7. The connecting wire 2 and the detection probe 3 are supported by the support block 6 and the fixing frame 5. The first electric push rod 15 drives the moving block 13 to move upward along the inner wall of the groove, so that the rotating plate 16 deflects and pushes the fixed baffle 17 to deflect. Both sides of the fixed baffle 17 rotate along the inner wall of the moving groove, so that the fixed baffle 17 rotates from the vertical state to the horizontal state. One end of the fixed baffle 17 abuts against the inner wall of the top of the storage tank 7. At the same time, through the action of the connecting block 14, when the first electric push rod 15 moves upward, it drives the moving structure 18 on the outer side of the bottom end of the mounting block 12 to move to the bottom of the detection probe 3. The moving of the moving structure 18 fits with the inner wall of the bottom of the storage tank 7 to support the bottom of the detection probe 3, so that both the top and the bottom of the detection probe 3 are supported and fixed, which is convenient to improve the stability of the detection probe 3, prevent the detection probe 3 from shaking after adjusting the depth and position, and affect the detection effect. By rotating the mounting block 12 to drive the movable rod 11 to rotate along the annular groove at the bottom of the mounting ring 10, it is convenient to drive the positions of the fixed baffle 17 and the rotating plate 16. When there is strong light irradiation, by adjusting the position of the fixed baffle 17 on the top of the storage tank 7, it can support the detection probe 3 and at the same time block the strong light, reducing the interference of the strong light on the detection probe 3. Then start the measuring instrument 1, so that the detection probe 3 detects the solution to be measured inside the storage tank 7. The change in the oxygen solubility will cause the change in the light intensity absorbed by the solution. The photoelectric detection module is used to obtain the concentration of dissolved oxygen by detecting the change in the light intensity. According to the change in the detected light intensity, the concentration of dissolved oxygen can be obtained, and at the same time, the parameters of the measuring instrument 1 can be calibrated to improve the accuracy and precision of the calibration, and the operation is convenient.

[0032] As Figures 3 to 4 shown, the fixed baffle 17 and the rotating plate 16 are both symmetrically arranged with the center of the moving block 13. An installation groove is opened at the bottom of the fixed baffle 17, and a second electric push rod 20 is fixedly installed inside the installation groove. One end of the second electric push rod 20 is fixedly installed with a fixed clamping block 21. The fixed clamping block 21 is located inside the installation groove, and a clamping groove is opened on one side of it.

[0033] Through the symmetrically arranged fixed baffle 17 and rotating plate 16, they can abut against and fix both sides of the inner wall of the top of the storage tank 7, improving the stability of the fixation of the top of the detection probe 3. By starting the second electric push rod 20 to drive the fixed clamping block 21 to move out of the installation groove, the clamping groove of the fixed clamping block 21 can clamp the top of the storage tank 7, thereby further improving the stability of the fixed baffle 17 and facilitating the detection of the detection probe 3.

[0034] As Figures 6 to 8As shown, the moving structure 18 includes a first rack 181. One side of the first rack 181 is fixedly installed with a connecting block 14. A gear 182 is meshed with one side of the first rack 181. A rotating rod is fixedly installed in the middle of the gear 182. A second rack 183 is meshed with one side of the gear 182. A protective cover 184 is fixedly installed on one side of the second rack 183. A fixing groove is formed at the bottom of the protective cover 184. An electric telescopic rod 185 is fixedly installed inside the fixing groove. A support ring 186 is fixedly installed at one end of the electric telescopic rod 185. The protective cover 184 is located at the bottom end of the mounting block 12. The first rack 181, the gear 182, and the second rack 183 are located between the protective cover 184 and the first electric push rod 15. The support ring 186 is located inside the fixing groove. The first rack 181, the gear 182, the rotating rod, the second rack 183, the electric telescopic rod 185, and the support ring 186 are all symmetrically arranged with the center of the mounting block 12 as the center.

[0035] When the first electric push rod 15 drives the connecting block 14 and the moving block 13 to move upward, the moving block 13 drives the first rack 181 to move upward, causing the gear 182 to drive the rotating rod to rotate, and driving the second rack 183 to drive the protective cover 184 to move downward. Through the symmetrically arranged first rack 181, gear 182, rotating rod, second rack 183, electric telescopic rod 185, and support ring 186, the stability of the movement of the protective cover 184 can be improved, so that the protective cover 184 moves from the bottom end of the mounting block 12 to the outer side of the bottom end of the detection probe 3, covering the outer side of the detection probe 3 to prevent the irradiation of strong light from interfering with the detection of the detection probe 3. At the same time, the electric telescopic rod 185 is started to drive the support ring 186 to move downward, so that the support block 6 is attached to the inner wall of the bottom of the storage tank 7, supporting the bottom end of the detection probe 3 and improving the stability of the bottom end of the detection probe 3. The movement of the support ring 186 driven by the electric telescopic rod 185 can be adjusted according to the placement depth of the detection probe 3, facilitating the support of the detection probe 3 at different placement depths.

[0036] As Figures 6 to 8 As shown, two first magnetic blocks 22 are fixedly installed on both sides of the middle of the second rack 183. The first magnetic blocks 22 are located on both sides of the gear 182. A moving port is formed at the bottom of the second rack 183 and on the inner wall of the bottom of the groove. Two second magnetic blocks 23 are fixedly installed on one inner wall of the moving port. The first magnetic blocks 22 and the second magnetic blocks 23 are magnetically connected.

[0037] When the second rack 183 drives the protective cover 184 to move downward, the bottom end of the second rack 183 passes through the moving port and moves downward, so that the protective cover 184 moves to the outside of the bottom end of the detection probe 3. When the second rack 183 and the top end of the protective cover 184 move to the position of the gear 182, the first magnetic block 22 in the middle of the second rack 183 moves to the second magnetic block 23 at the moving port. Through the magnetic connection between the first magnetic block 22 and the second magnetic block 23, the position of the protective cover 184 is fixed, the stability of the protective cover 184 is improved, so as to improve the shielding effect of the protective cover 184 on the detection probe 3, and avoid the optical signal detected by the photoelectric detection module inside the detection probe 3 from being interfered, thereby facilitating the improvement of the accuracy of the measurement result.

[0038] As Figures 6 to 8 shown, fixing plates 24 are rotatably connected to both sides of the rotating rod. The bottoms of the fixing plates 24 are fixedly installed on the inner wall of the groove. Limiting grooves are formed in the inner walls of both sides of the protective cover 184. Limiting blocks 25 are slidably connected inside the limiting grooves. The limiting blocks 25 are located below the groove, and one side of each limiting block 25 is fixedly installed on the outer wall of the bottom end of the mounting block 12.

[0039] The fixing plates 24 facilitate improving the stability when the gear 182 drives the rotating rod to rotate. When the protective cover 184 moves downward, the limiting blocks 25 on the outer side of the bottom end of the mounting block 12 move along the limiting grooves on the inner wall of the protective cover 184, further limiting the protective cover 184, further improving the stability of the movement of the protective cover 184, facilitating improving the shielding effect, facilitating the electric telescopic rod 185 to drive the support ring 186 to move, supporting the bottom end of the detection probe 3, and facilitating the use of the detection probe 3.

[0040] As Figures 9 to 10 shown, the protective cover 19 is threadedly connected to the outside of the protective cover 184. An installation port is formed in the middle of the protective cover 19. A moving plate 26 is arranged inside the installation port. A fixing rod 27 is fixedly installed at the top of the moving plate 26. A cleaning block 28 is fixedly installed at the top of the fixing rod 27. A pressing block 29 is fixedly installed at the bottom of the moving plate 26. A telescopic rod 30 is fixedly installed at the top of the pressing block 29. A sliding groove is formed at the top of the telescopic rod 30 and at the bottom of the protective cover 19. The top of the telescopic rod 30 is slidably connected to the sliding groove.

[0041] By threadedly connecting the protective cover 19 to the outer side of the protective housing 184, it is convenient to remove the protective cover 19 for using the detection probe 3 for detection. Moreover, the protective cover 19 can provide protection at the bottom of the detection probe 3 and the protective housing 184. When the detection probe 3 is not in use, it can prevent the detection probe 3 from being damaged due to impact. When the protective cover 19 is located at the bottom of the protective housing 184 and the detection probe 3, press the pressing block 29 upward, and the telescopic rod 30 contracts, causing the pressing block 29 to drive the moving plate 26 and the fixed rod 27 to move from the installation opening into the interior of the protective cover 19. At the same time, the fixed rod 27 drives the cleaning block 28 to move to the bottom of the detection probe 3. Then, rotate the pressing block 29 to drive the telescopic rod 30 to rotate along the sliding groove, causing the moving plate 26 to drive the fixed rod 27 and the cleaning block 28 to rotate along the bottom of the detection probe 3, cleaning the bottom of the detection probe 3. It is still possible to clean the detection probe 3 without opening the protective cover 19, which is convenient for improving the cleanliness of the detection probe 3 and preventing impurities from adhering, thus affecting the detection effect.

[0042] As Figures 9 to 10 shown, the pressing block 29 is located at the bottom of the protective cover 19. The telescopic rods 30 are symmetrically arranged on the left and right sides of the moving plate 26. The fixed rod 27 and the cleaning block 28 pass through the installation opening and extend into the interior of the protective cover 19. Compression springs 31 are arranged on both sides of the fixed rod 27. One end of the compression spring 31 is fixedly installed at the bottom of the cleaning block 28, and the other end is fixedly installed at the top of the moving plate 26. The cleaning block 28 is correspondingly arranged with the bottom of the detection probe 3.

[0043] Since the pressing block 29 is located at the bottom of the protective cover 19, it is convenient to press the pressing block 29 upward, causing the moving plate 26 to drive the fixed rod 27 and the cleaning block 28 to move to the bottom of the detection probe 3. When the moving plate 26 drives the fixed rod 27 and the cleaning block 28 to move to the bottom of the detection probe 3, the cleaning block 28 is brought into contact with the bottom of the detection probe 3 under the action of the compression spring 31. When the pressing block 29 is rotated, the cleaning block 28 can clean the detection probe 3 under the action of the moving plate 26 and the fixed rod 27, improving the cleanliness and thus facilitating use.

[0044] Working principle: When in use, place the solution to be measured in the storage tank 7. Pass the oxygen solution inside the storage tank 4 into the solution to be measured through the control valve via the connecting pipe 9. Rotate the protective cover 19 and remove it. Then, place the detection probe 3 inside the storage tank 7. Support the connecting wire 2 and the detection probe 3 through the support block 6 and the fixing frame 5. Start the first electric push rod 15 to drive the moving block 13 to move upward along the inner wall of the groove, so that the rotating plate 16 deflects and pushes the fixed baffle 17 to deflect. The two sides of the fixed baffle 17 rotate along the inner wall of the moving groove, so that the fixed baffle 17 rotates from the vertical state to the horizontal state. One end of the fixed baffle 17 abuts against the inner wall of the top of the storage tank 7. Then, start the second electric push rod 20 to drive the fixed clamping block 21 to move out of the installation groove, so that the clamping groove of the fixed clamping block 21 can clamp the top of the storage tank 7, thereby further improving the stability of the fixed baffle 17. At the same time, through the action of the connecting block 14, when the first electric push rod 15 moves upward, it drives the first rack 181 to move upward, so that the gear 182 drives the rotating rod to rotate along the fixed plate 24, and drives the second rack 183 and the protective cover 184 to move downward from the moving port. The limiting block 25 moves along the limiting groove. When the second rack 183 and the top of the protective cover 184 move to the position of the gear 182, the first rack 181 in the middle of the second rack 183 moves to the second magnetic block 23 at the moving port. Through the magnetic connection between the first magnetic block 22 and the second magnetic block 23, the protective cover 184 moves from the bottom end of the installation block 12 to the outside of the bottom end of the detection probe 3 for shielding, and fixes the position of the protective cover 184 to prevent the interference of strong light irradiation on the detection of the detection probe 3. At the same time, start the electric telescopic rod 185 to drive the support ring 186 to move downward, so that the support block 6 fits with the inner wall of the bottom of the storage tank 7 to support the bottom end of the detection probe 3, so that both the top end and the bottom end of the detection probe 3 are supported and fixed. Then, start the measuring instrument 1, so that the detection probe 3 detects the solution to be measured inside the storage tank 7. The change in the oxygen solubility will cause the change in the light intensity absorbed by the solution. The photoelectric detection module is used to obtain the concentration of dissolved oxygen by detecting the change in light intensity. The concentration of dissolved oxygen is obtained according to the change in the detected light intensity. At the same time, the parameters of the measuring instrument 1 can be calibrated to improve the accuracy and precision of calibration, and the operation is convenient.

[0045] When the protective cover 19 is located at the bottom of the protective housing 184 and the detection probe 3, press the pressing block 29 upward, the telescopic rod 30 contracts, so that the pressing block 29 drives the moving plate 26 and the fixing rod 27 to move from the installation opening into the interior of the protective cover 19. At the same time, the fixing rod 27 drives the cleaning block 28 to move to the bottom of the detection probe 3. Through the action of the compression spring 31, the cleaning block 28 fits against the bottom of the detection probe 3. Then rotate the pressing block 29 to drive the telescopic rod 30 to rotate along the sliding groove, so that the moving plate 26 drives the fixing rod 27 and the cleaning block 28 to rotate along the bottom of the detection probe 3 to clean the bottom of the detection probe 3. It is still possible to clean the detection probe 3 without opening the protective cover 19, which is convenient for improving the cleanliness of the detection probe 3 and preventing impurities from adhering and affecting the detection effect.

[0046] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them.

Claims

1. A calibration device for measuring dissolved oxygen in liquid, characterized in that: The invention comprises a measuring instrument, wherein a connecting line is arranged on one side of the measuring instrument, a detection probe is arranged on one end of the connecting line, a photoelectric detection module is arranged inside the detection probe, a storage tank is arranged on one side of the measuring instrument and located on one side of the connecting line, a fixing frame is arranged on the front side of the storage tank, a support block is fixedly installed on the top of one side of the fixing frame, one end of the connecting line is located at the bottom of the support block, a storage tank is arranged on the front side of the fixing frame, a placement seat is arranged on the bottom of the storage tank, a connecting pipe is fixedly installed on one side of the storage tank, a control valve is arranged on one end of the connecting pipe, and the other end is located inside the storage tank, a mounting ring is fixedly installed on one end of the detection probe, an annular groove is provided at the bottom of the mounting ring, a movable rod is movably connected inside the annular groove, a mounting block is fixedly installed on one end of the movable rod, the inner wall of the mounting block is rotatably connected to the outer side of the detection probe, a groove is provided in the middle of the mounting block, and a moving block is slidably connected to the inner wall of the groove, The bottom of the moving block is fixedly installed with a connecting block, and the bottom of the connecting block is fixedly installed with a first electric push rod, and the bottom of the first electric push rod is fixedly installed with the inner wall of the bottom of the groove, and the two ends of the top of the moving block are hinged with a rotating plate, and one end of the rotating plate is hinged with a fixed baffle, and a moving groove is opened on both sides of the top of the mounting block, and both sides of the fixed baffle are rotatably connected with the inner wall of the moving groove, and a moving structure is arranged on one side of the first electric push rod and located on the outer side of the bottom end of the mounting block; the moving structure includes a first rack, one side of the first rack is fixedly installed with the connecting block, one side of the first rack is meshed with a gear, a rotating rod is fixedly installed in the middle of the gear, one side of the gear is meshed with a second rack, and one side of the second rack is fixedly installed with a protective cover, and the protective cover is located at the bottom end of the mounting block, and a fixing groove is opened at the bottom of the protective cover, and an electric telescopic rod is fixedly installed inside the fixing groove, and a supporting ring is fixedly installed on one end of the electric telescopic rod; When the first electric push rod drives the connecting block and the moving block to move upward, the moving block drives the first rack to move upward, so that the gear drives the rotating rod to rotate, and the second rack drives the protective cover to move downward to cover the outside of the detection probe.

2. The calibration device for measuring dissolved oxygen in liquid according to claim 1, characterized in that: Oxygen solution is arranged inside the storage tank, the detection probe passes through the middle of one side of the fixing frame and extends to the inside of the storage tank, and the detection probe is provided with a protective cover at the bottom of the mobile structure.

3. The calibration device for measuring dissolved oxygen in liquid according to claim 1, characterized in that: The fixed baffle and the rotating plate are symmetrically arranged around the center of the moving block. A mounting groove is provided at the bottom of the fixed baffle. A second electric push rod is fixedly installed inside the mounting groove. A fixed clamping block is fixedly installed at one end of the second electric push rod. The fixed clamping block is located inside the mounting groove and a clamping groove is provided on one side of the fixed baffle.

4. The calibration device for measuring dissolved oxygen in liquid according to claim 1, characterized in that: The first rack, gear, and second rack are located between the protective cover and the first electric push rod, the support ring is located inside the fixing groove, and the first rack, gear, rotating rod, second rack, electric telescopic rod and support ring are all symmetrically arranged around the center of the mounting block.

5. The calibration device for measuring dissolved oxygen in liquid according to claim 1, characterized in that: First magnetic blocks are fixedly installed on both sides of the middle of the second rack, the first magnetic blocks are located on both sides of the gear, a moving opening is opened at the bottom of the second rack and on the inner wall at the bottom of the groove, two second magnetic blocks are fixedly installed on the inner wall on one side of the moving opening, and the first magnetic block is magnetically connected to the second magnetic block.

6. The calibration device for measuring dissolved oxygen in liquid according to claim 4, characterized in that: Fixed plates are rotatably connected on both sides of the rotating rod, and the bottom of the fixed plate is fixedly installed on the inner wall of the groove. Limiting grooves are opened on the inner walls of both sides of the protective cover, and limiting blocks are slidably connected inside the limiting grooves. The limiting block is located below the groove, and one side of the limiting block is fixedly installed on the outer wall of the bottom end of the mounting block.

7. The calibration device for measuring dissolved oxygen in liquid according to claim 2, characterized in that: The protective cover is threadedly connected to the outer side of the protective cover, a mounting opening is opened in the middle of the protective cover, a movable plate is arranged inside the mounting opening, a fixing rod is fixedly installed on the top of the movable plate, a cleaning block is fixedly installed on the top of the fixing rod, a pressing block is fixedly installed on the bottom of the movable plate, a telescopic rod is fixedly installed on the top of the pressing block, a sliding groove is opened on the top of the telescopic rod and located at the bottom of the protective cover, and the top of the telescopic rod is slidably connected to the sliding groove.

8. The calibration device for measuring dissolved oxygen in liquid according to claim 7, characterized in that: The pressing block is located at the bottom of the protective cover, the telescopic rod is symmetrically arranged on the left and right sides of the movable plate, the fixed rod and the cleaning block extend to the inside of the protective cover through the installation opening, and compression springs are arranged on both sides of the fixed rod, one end of the compression spring is fixedly installed on the bottom of the cleaning block, and the other end thereof is fixedly installed on the top of the movable plate, and the cleaning block is arranged corresponding to the bottom of the detection probe.

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