A dissolved oxygen concentration measuring device

Abstract

The utility model provides a kind of dissolved oxygen concentration measuring device, including base and controller, base top surface is equipped with water tank and support plate, support plate is connected with first hydraulic ram by telescopic arm, first hydraulic ram is connected with lifting plate, lifting plate bottom surface is equipped with shell, shell inner top surface is connected with piston by second hydraulic ram, piston bottom is equipped with electrode rod, electrode rod is slidably connected with partition, shell side surface is equipped with electromagnetic valve, telescopic arm is equipped with liquid storage tank, liquid storage tank is connected in electromagnetic valve by conduit one, conduit one is equipped with liquid pump, partition lower side is equipped with annular pipe, annular pipe is equipped with water spray hole, water tank top is equipped with water pump, water pump side is connected in annular pipe by conduit two, other side is communicated in water tank bottom by conduit three.The utility model is equipped with piston, second hydraulic ram drives piston to draw reference liquid into upper cavity, realize the automatic replenishment of reference liquid, simultaneously, deionized water is sprayed from annular pipe can wash electrode rod, keep electrode rod cleanliness.

Description

Technical Field

[0001] This utility model relates to the field of oxygen detection technology, and in particular to a dissolved oxygen concentration measuring device. Background Technology

[0002] Dissolved oxygen (DO) refers to oxygen molecules dissolved in water, usually expressed in milligrams per liter (mg / L) or as a percentage of saturation (%). Dissolved oxygen is a crucial indicator of aquatic ecosystems, directly impacting the survival of aquatic organisms and the self-purification capacity of water bodies. Oxygen enters water through atmospheric contact and photosynthesis by aquatic plants, and its concentration is affected by factors such as temperature, pressure, salinity, and water flow. Both excessively high and low dissolved oxygen concentrations can disrupt the ecological balance of aquatic bodies; therefore, accurate measurement is of paramount importance.

[0003] The dissolved oxygen concentration measuring device mainly consists of a sensor probe, a measuring circuit, a display screen and operation panel, as well as a power supply and interface. The sensor probe is the core component of the device, responsible for directly contacting the water sample and sensing the dissolved oxygen concentration. The measuring circuit converts the electrical signal collected by the sensor probe into a readable dissolved oxygen concentration value. Depending on the concentration, the diaphragm electrode of the dissolved oxygen measuring device is mainly divided into two types: polarographic and galvanic cell. The polarographic type uses silver-silver chloride as the counter electrode, while the galvanic cell type uses silver as the anode and lead as the cathode.

[0004] In existing technologies, when measuring dissolved oxygen concentration in wastewater, a polarographic silver-silver chloride electrode is lowered into the wastewater. The electrode and wastewater are in long-term contact, and sludge will cover the electrode surface, significantly reducing the oxygen molecule permeation rate. This leads to current signal attenuation, decreased detection sensitivity, and increased measurement error. Moreover, the electrode and reference solution will undergo electrochemical reactions and volatilize, gradually consuming the solution and requiring regular replenishment, which increases the maintenance workload. Utility Model Content

[0005] In view of this, the present invention proposes a dissolved oxygen concentration measuring device to solve the problems mentioned above.

[0006] The technical solution of this utility model is implemented as follows:

[0007] A dissolved oxygen concentration measuring device includes a base and a controller. The top surface of the base has a water tank and a support plate. A telescopic arm is provided on the side of the support plate. A first hydraulic rod is provided on the bottom surface of the telescopic arm away from the support plate. The telescopic end of the first hydraulic rod is connected to a lifting plate. The bottom surface of the lifting plate has a housing with an opening at the bottom. The housing is divided into an upper cavity and a lower cavity by a partition. A second hydraulic rod is provided on the top surface inside the housing. The telescopic end of the second hydraulic rod is connected to a piston. The bottom of the piston is opposite to an electrode rod, and the electrode rod slides against the partition. The connection includes a solenoid valve on the side of the housing, a liquid storage tank on the telescopic arm, a liquid storage tank connected to the solenoid valve via a conduit and connected to the bottom of the upper cavity, a liquid pump on the conduit, an annular pipe below the partition, multiple water spray holes on the inner side of the annular pipe, a water pump on the top of the water tank, one side of the water pump connected to the annular pipe via a conduit two, and the other side connected to the bottom of the water tank via a conduit three, and a controller located on the side of the water tank and electrically connected to the telescopic arm, the first hydraulic rod, the second hydraulic rod, the liquid pump, the solenoid valve, and the water pump.

[0008] Preferably, the telescopic arm includes a horizontal plate, a sliding plate, and a third hydraulic rod. The horizontal plate is disposed on the side of the support plate, the sliding plate is slidably disposed on the top surface of the horizontal plate, and the third hydraulic rod is disposed on the side of the support plate, with its telescopic end connected to the side of the sliding plate.

[0009] Preferably, the end of the horizontal plate away from the support plate is provided with a U-shaped groove.

[0010] Preferably, both the first and second conduits are made of retractable corrugated pipes and pass through the lifting plate respectively.

[0011] Preferably, it also includes a support base, which is disposed on the top surface of the base and has a groove on its top.

[0012] Preferably, it also includes rollers, which are disposed on the bottom surface of the base.

[0013] Preferably, it also includes a protective cover, which is fitted onto the outer circumference of the bottom of the housing, and the protective cover has a through hole on its side.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. Equipped with a piston, the second hydraulic rod drives the piston upward to draw the reference liquid into the upper chamber, achieving zeroing operation of the detection device; the second hydraulic rod drives the piston downward to squeeze the reference liquid out of the upper chamber. After the dissolved oxygen concentration measurement is completed, when the piston rises, it can replenish the reference liquid into the upper chamber, thus achieving automatic replenishment of the reference liquid; simultaneously, the water pump is started, drawing deionized water from the water tank. The deionized water flows into the annular pipe through conduit three and conduit two, and is sprayed out from the spray hole. The water flow cleans the electrode rod, preventing sludge from covering the electrode surface and reducing the oxygen molecule permeation rate, which would lead to current signal attenuation, decreased detection sensitivity, and large measurement error.

[0016] 2. A telescopic arm and support base are installed. After the dissolved oxygen concentration measurement is completed, the telescopic arm can be activated to move the first hydraulic rod into the U-shaped groove, placing the housing and protective cover into the groove of the support base. This reduces the overall size of the device and facilitates movement. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only preferred embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural diagram of a dissolved oxygen concentration measuring device according to the present invention;

[0019] Figure 2 This is a cross-sectional structural diagram of a dissolved oxygen concentration measuring device according to the present invention;

[0020] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0021] In the diagram, 1. Base; 2. Water tank; 3. Support plate; 4. Horizontal plate; 5. First hydraulic rod; 6. Slide plate; 7. U-shaped groove; 8. Water pump; 9. First conduit; 10. Storage tank; 11. Liquid pump; 12. Second conduit; 13. Second hydraulic rod; 14. Lifting plate; 15. Housing; 16. Third conduit; 17. Protective cover; 18. Support seat; 19. Roller; 20. Controller; 21. Third hydraulic rod; 22. Piston; 23. Electrode rod; 24. Partition; 25. Annular pipe; 26. Water spray hole; 27. Solenoid valve; 28. Groove. Detailed Implementation

[0022] To better understand the technical content of this utility model, a specific embodiment is provided below, and the utility model will be further described in conjunction with the accompanying drawings.

[0023] See Figures 1 to 3 This utility model provides a dissolved oxygen concentration measuring device, including a base 1 and a controller 20. The top surface of the base 1 is provided with a water tank 2 and a support plate 3. The side of the support plate 3 is provided with a telescopic arm. The bottom surface of the telescopic arm away from the support plate 3 is provided with a first hydraulic rod 5. The telescopic end of the first hydraulic rod 5 is connected to a lifting plate 14. The bottom surface of the lifting plate 14 is provided with a housing 15. The bottom of the housing 15 is provided with an opening. The housing 15 is divided into an upper cavity and a lower cavity by a partition 24. The top surface of the inner side of the housing 15 is provided with a second hydraulic rod 13. The telescopic end of the second hydraulic rod 13 is connected to a piston 22. The bottom of the piston 22 is opposite to an electrode rod 23. The electrode rod 23 is slidably connected to the partition 24. The storage tank 10 stores a reference solution, which is a KCl solution. The housing 15 has a solenoid valve 27 on its side, and a liquid storage tank 10 is provided on the telescopic arm. The liquid storage tank 10 is connected to the solenoid valve 27 and communicates with the bottom of the upper cavity through a conduit 9. A liquid pump 11 is provided on the conduit 9 and is located on the telescopic arm. An annular pipe 25 is provided below the partition 24. Multiple water spray holes 26 are provided on the inner side of the annular pipe 25. A water pump 8 is provided on the top of the water tank 2. One side of the water pump 8 is connected to the annular pipe 25 through a conduit 22, and the other side is connected to the bottom of the water tank 2 through a conduit 316. The water tank 2 stores deionized water. The controller 20 is located on the side of the water tank 2 and is electrically connected to the telescopic arm, the first hydraulic rod 5, the second hydraulic rod 13, the liquid pump 11, the solenoid valve 27, and the water pump 8. The controller 20 uses an STM32-L0 low-power microprocessor.

[0024] When the measuring device is working, first move the device to the side of the sewage to be tested position, then activate the telescopic arm. The telescopic arm extends, driving the first hydraulic rod 5 to move above the sewage. Then activate the second hydraulic rod 13. The telescopic end of the second hydraulic rod 13 extends, driving the electrode rod 23 and piston 22 to descend. The electrode rod 23 slowly enters the lower cavity through the partition 24. When the electrode rod 23 is in the middle of the annular tube 25, activate the water pump 8. The water pump 8 draws out the deionized water from the water tank 2. The deionized water flows into the annular tube 25 through the third conduit 16 and the second conduit 12, and is sprayed out from the spray hole 26. The water flow cleans and wets the electrode rod 23. When the piston 22 bottoms out... When the surface of the partition 24 is in contact with the top surface, the solenoid valve 27 is opened and the liquid pump 11 is started. The liquid pump 11 draws out the reference liquid from the storage tank 10. The reference liquid is connected to the solenoid valve 27 through the conduit 9. At the same time, the second hydraulic rod 13 is started. The extension end of the second hydraulic rod 13 shortens, driving the piston 22 and the electrode rod 23 to rise. The reference liquid enters the upper cavity from the solenoid valve 27. When the bottom surface of the motor rod is flush with the bottom surface of the partition 24, the water pump 8 and the second hydraulic rod 13 are stopped. At this time, the controller 20 detects the electrode rod 23 and uses the electrochemical principle to zero the dissolved oxygen concentration measurement value. Since the reference liquid is a KCl solution, the dissolved oxygen concentration detection value is zero.

[0025] After the dissolved oxygen concentration measurement value is zeroed, the first hydraulic rod 5 is activated. The extension end of the first hydraulic rod 5 extends, causing the lifting plate 14 to descend. The descent of the lifting plate 14 causes the housing 15 to descend to the detection water level. Then, the second hydraulic rod 13 is activated. The extension of the second hydraulic rod 13 causes the piston 22 and electrode rod 23 to descend. The electrode rod 23 descends into the lower cavity. When the bottom surface of the piston 22 is in contact with the top surface of the partition 24, the electrode rod 23 comes into contact with the sewage. Then, the controller 20 is activated to detect the electrode rod 23, thereby realizing the detection of dissolved oxygen concentration in the sewage. After the dissolved oxygen concentration in the wastewater is detected, the first hydraulic rod 5 is activated. The telescopic end of the first hydraulic rod 5 shortens, causing the lifting plate 14 to rise, so that the entire housing 15 leaves the wastewater. Then, the water pump 8 is activated, and the water pump 8 draws out the deionized water from the water tank 2. The deionized water flows into the annular pipe 25 through the third conduit 16 and the second conduit 12, and is sprayed out from the spray hole 26. The deionized water flow cleans the electrode rod 23, preventing sludge from covering the electrode surface and reducing the oxygen molecule permeation rate, which would lead to current signal attenuation, decreased detection sensitivity, and large measurement error.

[0026] Preferably, the telescopic arm includes a horizontal plate 4, a sliding plate 6, and a third hydraulic rod 21. The horizontal plate 4 is disposed on the side of the support plate 3, the sliding plate 6 is slidably disposed on the top surface of the horizontal plate 4, and the third hydraulic rod 21 is disposed on the side of the support plate 3, with its telescopic end connected to the side of the sliding plate 6.

[0027] The telescopic arm is used to move the first hydraulic rod 5 to the position of the sewage to be tested, and at the same time provides an installation point for the storage tank 10 and the pump 11. The controller 20 can drive the slide plate 6 to slide along the top surface of the horizontal plate 4 by controlling the extension and retraction of the third hydraulic rod 21. The movement of the slide plate 6 drives the first hydraulic rod 5 to move, so as to achieve adjustment of different positions.

[0028] Preferably, the end of the horizontal plate 4 away from the support plate 3 is provided with a U-shaped groove 7.

[0029] After the dissolved oxygen concentration is detected, the third hydraulic rod 21 is activated. The extension end of the third hydraulic rod 21 shortens, causing the slide plate 6 to move. The movement of the slide plate 6 can move the housing 15 to the side of the water tank 2. The first hydraulic rod 5 will move into the U-shaped groove 7, reducing the overall size of the device and facilitating standby and movement.

[0030] Preferably, both the first conduit 9 and the second conduit 12 are made of retractable corrugated pipes and pass through the lifting plate 14 respectively.

[0031] When the detection device is working, the lifting plate 14 will rise or fall. Both the first conduit 9 and the second conduit 12 are made of retractable corrugated pipes, which can adjust the length of the retraction to adapt to changes in different positions, so as to avoid the first conduit 9 and the second conduit 12 from bending and affecting the normal flow of the reference liquid and deionized water.

[0032] Preferably, it also includes a support base 18, which is disposed on the top surface of the base 1 and has a groove 28 on its top.

[0033] After the dissolved oxygen concentration is detected, the first hydraulic rod 5 is activated. The telescopic end of the first hydraulic rod 5 extends, causing the housing 15 to descend and fall into the groove 28 on the top of the support base 18, thus fixing the housing 15 and preventing collisions that could damage the electrode rod 23.

[0034] Preferably, it also includes a roller 19, which is disposed on the bottom surface of the base 1.

[0035] The rollers 19 can improve the mobility of the base 1, making it easier to move the device to the location where the wastewater needs to be tested.

[0036] Preferably, it also includes a protective cover 17, which is fitted onto the outer circumference of the bottom of the housing 15, and the protective cover 17 has a through hole on its side.

[0037] The turbulent environment of the wastewater treatment aeration tank can accelerate the mechanical wear of the electrodes. The protective cover 17 can reduce the effect of turbulence and prevent the housing 15 from being damaged by collisions with other hard objects in fast-flowing water, thus extending the service life of the detection device.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dissolved oxygen concentration measuring device, characterized in that, The system includes a base and a controller. The top surface of the base has a water tank and a support plate. A telescopic arm is located on the side of the support plate. A first hydraulic rod is located on the bottom surface of the telescopic arm away from the support plate. The telescopic end of the first hydraulic rod is connected to a lifting plate. The bottom surface of the lifting plate has a housing with an opening at the bottom. The housing is divided into an upper cavity and a lower cavity by a partition. A second hydraulic rod is located on the top surface inside the housing. The telescopic end of the second hydraulic rod is connected to a piston. The bottom of the piston is opposite to an electrode rod. The electrode rod is slidably connected to the partition. The housing... A solenoid valve is provided on the side of the body. A liquid storage tank is provided on the telescopic arm. The liquid storage tank is connected to the solenoid valve and connected to the bottom of the upper cavity through a conduit. A liquid pump is provided on the conduit and is located on the telescopic arm. An annular pipe is provided below the partition. Multiple water spray holes are provided on the inner side of the annular pipe. A water pump is provided on the top of the water tank. One side of the water pump is connected to the annular pipe through a conduit, and the other side is connected to the bottom of the water tank through a conduit. The controller is located on the side of the water tank and is electrically connected to the telescopic arm, the first hydraulic rod, the second hydraulic rod, the liquid pump, the solenoid valve, and the water pump.

2. The dissolved oxygen concentration measuring device according to claim 1, characterized in that, The telescopic arm includes a horizontal plate, a sliding plate, and a third hydraulic rod. The horizontal plate is located on the side of the support plate, the sliding plate is slidably located on the top surface of the horizontal plate, and the third hydraulic rod is located on the side of the support plate, with its telescopic end connected to the side of the sliding plate.

3. The dissolved oxygen concentration measuring device according to claim 2, characterized in that, The horizontal plate has a U-shaped groove at the end away from the support plate.

4. The dissolved oxygen concentration measuring device according to claim 1, characterized in that, Both the first and second conduits are made of retractable corrugated pipes and pass through the lifting plate respectively.

5. The dissolved oxygen concentration measuring device according to claim 1, characterized in that, It also includes a support base, which is located on the top surface of the base and has a groove on its top.

6. The dissolved oxygen concentration measuring device according to claim 1, characterized in that, It also includes rollers, which are located on the bottom surface of the base.

7. The dissolved oxygen concentration measuring device according to claim 1, characterized in that, It also includes a protective cover, which is fitted onto the outer circumference of the bottom of the housing, and the protective cover has through holes on its side.

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