Permanganate index titration module

Abstract

The utility model belongs to the technical field of titration modules, and discloses a permanganate index titration module which comprises a quartz glass cup mounted on a module fixing frame and a glass cup cover mounted at the upper end of the quartz glass cup, and a burette, a liquid inlet pipe and an OPR electrode used for detecting potential in a solution are mounted on the glass cup cover; a heating wire is wound on the outer surface of the quartz glass cup, and a temperature sensor is embedded in the quartz glass cup; the module fixing frame is provided with a heat dissipation fan for rapidly dissipating heat of the quartz glass cup; a magnetic stirrer is arranged on the inner bottom face of the quartz glass cup, and a driving mechanism installed on the module fixing frame is arranged below the quartz glass cup. The device is compact in structure, small in size, convenient to assemble and low in production cost; the OPR electrode, the cooling fan and other parts with short service life are simple to replace and convenient to maintain; the heating wire is used for directly heating the quartz glass cup, and two cooling fans are arranged behind the quartz glass cup, so that rapid heating and rapid cooling can be realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of titration modules, and particularly relates to a permanganate index titration module. Background Art

[0002] At present, when the permanganate index meter is measured by titration method, the measurement process is affected by many conditions. In the titration module of the existing meter, it is necessary to uniformly heat the titration module, quickly dissipate heat, and measure accurate data within a specified time, which makes the titration module of the automatic detection instrument complex and brings great difficulties to assembly and later operation and maintenance.

[0003] Therefore, how to provide a stable permanganate index titration module that is simple, can be uniformly heated, quickly dissipate heat, has a small volume, is convenient for assembly, maintenance and inspection is an urgent technical problem to be solved by those skilled in the art. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a permanganate index titration module to solve the above problems existing in the prior art.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A permanganate index titration module includes a quartz glass cup installed on a module fixing frame and a glass cup cover installed on the upper end of the quartz glass cup. A burette, a liquid inlet pipe and an OPR electrode for detecting the potential in the solution are installed on the glass cup cover; a heating wire is wound around the outer surface of the quartz glass cup, and a temperature sensor is embedded in the quartz glass cup; a cooling fan for quickly dissipating heat from the quartz glass cup is installed on the module fixing frame; a magnetic stirrer is arranged on the inner bottom surface of the quartz glass cup, and a driving mechanism installed on the module fixing frame is arranged below the quartz glass cup for controlling the magnetic stirrer to stir the solution in the quartz glass cup through the driving mechanism.

[0007] As a preferred technical solution in the utility model, the upper end of the quartz glass cup is provided with an outward-extending annular cup edge, the lower end of the annular cup edge is lapped on the module fixing frame, and a glass cup gasket made of polytetrafluoroethylene material is arranged between the annular cup edge and the module fixing frame.

[0008] As a preferred technical solution in the utility model, a first through hole for installing the OPR electrode is opened on the glass cup cover, two annular grooves are arranged inside the first through hole, and electrode sealing rings for strengthening the sealing between the OPR electrode and the glass cup cover are arranged in both annular grooves.

[0009] As a preferred technical solution in the present utility model, a thermometer mounting groove recessed towards the middle of the quartz glass cup is provided on the side wall of one side of the quartz glass cup, and a temperature sensor is installed in the thermometer mounting groove; the lower end of the OPR electrode is arranged close to the thermometer mounting groove, and both the thermometer mounting groove and the OPR electrode are located above the magnetic stirrer.

[0010] As a preferred technical solution in the present utility model, a second through hole is provided on the glass cup cover, a condenser joint is fixedly installed in the second through hole, the upper end of the condenser joint is connected with a condenser, and an upper part of the condenser is sleeved with a condenser, and a condenser fixing frame is installed outside the condenser.

[0011] As a preferred technical solution in the present utility model, a glass cup cover fixing piece is provided at the upper end of the glass cup cover, and the glass cup cover fixing piece, the glass cup cover and the module fixing frame are connected by screws.

[0012] As a preferred technical solution in the present utility model, two heat dissipation fans are provided, the outlets of the two heat dissipation fans face the quartz glass cup and are both installed on a frame-shaped fixing plate, and the frame-shaped fixing plate is fixedly connected to the rear side of the module fixing frame.

[0013] As a preferred technical solution in the present utility model, the driving mechanism includes a motor, a coupling and a magnet. A motor fixing plate is installed on the module fixing frame, the motor is installed on the motor fixing plate, the motor shaft of the motor is arranged close to the quartz glass cup and fixedly connected with the coupling, the magnet is located on the coupling, and the magnet is eccentrically arranged with the motor shaft of the motor.

[0014] As a preferred technical solution in the present utility model, the module fixing frame is connected with the module outer cover and both are made of non-magnetic materials, and a plurality of small holes for heat dissipation are provided on the module outer cover.

[0015] As a preferred technical solution in the present utility model, the lower end of one side of the quartz glass cup is connected with a glass cup adapter through an adapter reinforcing nut, and the glass cup adapter is connected with a drain pipe.

[0016] Beneficial effects: When the present utility model is in use, a certain amount of water sample is added into the quartz glass cup through the liquid inlet pipe. The driving mechanism at the bottom is started to drive the magnetic stirrer to stir the liquid in the quartz glass cup. Then, a known amount of potassium permanganate and sulfuric acid are added into the quartz glass cup through the liquid inlet pipe to make the added liquids mix evenly inside. The heating wire heats to the required temperature, and the temperature sensor embedded in the quartz glass cup senses the solution temperature to keep the solution temperature constant. Then, an excessive amount of sodium oxalate is added through the liquid inlet pipe to reduce the remaining potassium permanganate. Finally, the potassium permanganate standard solution is slowly dropped through the burette to titrate back the excessive sodium oxalate. The oxidation-reduction potential of the solution in the quartz glass cup is detected by the OPR electrode, and the permanganate index in the water sample is obtained through calculation. The solution temperature is reduced by the subsequent heat dissipation fan. The structure of the present utility model is compact, which can make the volume smaller, is convenient for assembly, and has a low production cost; the components with short service lives such as the OPR electrode and the heat dissipation fan are simple to replace and convenient for maintenance; the quartz glass cup is directly heated by the heating wire, and two heat dissipation fans are installed at the back, which can heat quickly and dissipate heat quickly. Brief Description of the Drawings

[0017] Figure 1 It is a rear schematic view of the present utility model;

[0018] Figure 2 It is a front schematic view of the present utility model;

[0019] Figure 3 It is a structural schematic view of the present utility model when the module fixing frame and the module outer cover are not provided;

[0020] Figure 4 It is a sectional view of the present utility model;

[0021] Figure 5 It is a sectional view of the glass cup cover and the quartz glass cup in the present utility model.

[0022] In the figure: 1 - OPR electrode; 2 - condenser fixing frame; 3 - condenser; 4 - module outer cover; 5 - burette joint; 6 - condenser tube joint; 7 - condenser tube; 8 - burette; 9 - liquid inlet pipe; 10 - liquid inlet pipe joint; 11 - heat dissipation fan; 12 - frame-shaped fixing plate; 13 - drain pipe; 14 - heating wire; 15 - glass cup cover fixing piece; 16 - module fixing frame; 17 - electrode sealing ring; 18 - glass cup cover; 19 - glass cup gasket; 20 - quartz glass cup; 21 - temperature sensor; 22 - magnetic stirrer; 23 - adapter reinforcement nut; 24 - glass cup adapter; 25 - magnet; 26 - coupling; 27 - motor fixing plate; 28 - motor. Detailed Embodiment

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in combination with the accompanying drawings and the description of the embodiments or the prior art. Obviously, the following description of the structures of the drawings is only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. It should be noted here that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation to the present invention.

[0024] Embodiment:

[0025] As Figures 1 - 5 shown, this embodiment provides a permanganate index titration module, which includes a quartz glass cup 20 installed on a module fixing frame 16 and a glass cup cover 18 installed on the upper end of the quartz glass cup 20. A burette 8, a liquid inlet pipe 9, and an OPR electrode 1 for detecting the potential in the solution are installed on the glass cup cover 18. The burette 8 is connected to the glass cup cover 18 through a burette joint 5, and the liquid inlet pipe 9 is connected to the glass cup cover 18 through a liquid inlet pipe joint 10; a heating wire 14 is wound around the outer surface of the quartz glass cup 20 to facilitate rapid heating. Preferably, a plurality of limiting protrusions are provided on the outer surface of the quartz glass cup 20 to limit the heating wire 14, so that the heating wire 14 can heat the quartz glass cup 20 more quickly and evenly. A temperature sensor 21 is embedded and installed inside the quartz glass cup 20 to facilitate real-time detection of the temperature of the solution in the quartz glass cup 20; a cooling fan 11 for quickly dissipating heat from the quartz glass cup 20 is installed on the module fixing frame 16 to facilitate rapid heat dissipation; a magnetic stirrer 22 is provided on the inner bottom surface of the quartz glass cup 20, and a driving mechanism installed on the module fixing frame 16 is provided below the quartz glass cup 20 to control the magnetic stirrer 22 to stir the solution in the quartz glass cup 20 through the driving mechanism.

[0026] When the utility model is in use, a certain amount of water sample is added into the quartz glass cup through the liquid inlet pipe. The driving mechanism at the bottom is started to drive the magnetic stirrer to stir the liquid in the quartz glass cup. Then, a known amount of potassium permanganate and sulfuric acid are added into the quartz glass cup through the liquid inlet pipe to make the added liquids mix evenly inside. The heating wire heats to the required temperature, and the temperature sensor embedded in the quartz glass cup senses the solution temperature to keep the solution temperature constant. Then, an excessive amount of sodium oxalate is added through the liquid inlet pipe to reduce the remaining potassium permanganate. Finally, the potassium permanganate standard solution is slowly dropped through the burette to titrate the excessive sodium oxalate. The oxidation-reduction potential of the solution in the quartz glass cup is detected through the OPR electrode, and the permanganate index in the water sample is obtained through calculation. The solution temperature is reduced by the cooling fan at the back. The structure of the utility model is compact, which can make the volume smaller, convenient for assembly, and has a low production cost. The components with short service lives such as the OPR electrode and the cooling fan are simple to replace and convenient to maintain. The quartz glass cup is directly heated by the heating wire, and two cooling fans are installed at the back, which can heat and dissipate heat quickly.

[0027] As a preferred implementation in this embodiment, it should be further noted that the upper end of the quartz glass cup 20 is provided with an outward-extending annular cup rim. The lower end of the annular cup rim is lapped on the module fixing frame 16, and a glass cup gasket 19 made of polytetrafluoroethylene material is arranged between the annular cup rim and the module fixing frame 16 to prevent the module fixing frame 16 from directly contacting the quartz glass cup 20 and damaging the glass cup.

[0028] As a preferred implementation in this embodiment, it should be further noted that the glass cup cover 18 is provided with a first through hole for installing the OPR electrode 1. Two annular grooves are arranged inside the first through hole, and electrode sealing rings 17 for strengthening the sealing between the OPR electrode 1 and the glass cup cover 18 are arranged in both annular grooves. While preventing steam from escaping from here, it can also fix the OPR electrode 1 to prevent the OPR electrode 1 from shaking left and right and sliding up and down, improving the stability of the measurement module.

[0029] As a preferred implementation in this embodiment, it should be further noted that a thermometer installation groove recessed towards the middle of the quartz glass cup 20 is arranged on the side wall of one side of the quartz glass cup 20. The temperature sensor 21 is installed in the thermometer installation groove to measure the solution temperature more accurately. The lower end of the OPR electrode 1 is arranged close to the thermometer installation groove to detect the potential in the solution. Both the thermometer installation groove and the OPR electrode 1 are located above the magnetic stirrer 22 and keep a certain distance from the magnetic stirrer 22 to prevent the magnetic stirrer 22 from hitting the OPR electrode 1 and thus damaging the OPR electrode 1.

[0030] As a preferred implementation in this embodiment, it should be further noted that a second through hole is provided on the glass cup lid 18, and a condenser joint 6 is fixedly installed in the second through hole. The upper end of the condenser joint 6 is connected to a condenser tube 7, and the upper part of the condenser tube 7 is sleeved with a condenser 3. The steam is sent to the condenser through the condenser tube, and the steam condenses into a liquid at the condenser position and returns to the quartz glass cup. Potassium permanganate in the solution oxidizes organic substances and reducing inorganic substances in the water sample. A condenser fixing frame 2 is installed outside the condenser 3 to facilitate fixing with external objects and ensure stability.

[0031] As a preferred implementation in this embodiment, it should be further noted that a glass cup lid fixing piece 15 is provided at the upper end of the glass cup lid 18. The glass cup lid fixing piece 15, the glass cup lid 18 and the module fixing frame 16 are connected by screws, and the screws will not damage the glass cup lid 18 during fixing.

[0032] As a preferred implementation in this embodiment, it should be further noted that two heat dissipation fans 11 are provided. The outlets of the two heat dissipation fans 11 face the quartz glass cup 20 and are both installed on the frame-shaped fixing plate 12, which can achieve rapid heat dissipation of the quartz glass cup 20. First, the frame-shaped fixing plate 12 is fixedly connected to the rear side of the module fixing frame 16 to ensure the stability of the heat dissipation fans 11.

[0033] As a preferred implementation in this embodiment, it should be further noted that the driving mechanism includes a motor 28, a coupling 26 and a magnet 25. A motor fixing plate 27 is installed on the module fixing frame 16, the motor 28 is installed on the motor fixing plate 27, the motor shaft of the motor 28 is arranged close to the quartz glass cup 20 and is fixedly connected to the coupling 26, the magnet 25 is located on the coupling 26, and the magnet 25 is eccentrically arranged with respect to the motor shaft of the motor 28. When the motor 28 is started, the magnet 25 is driven to rotate in a circle through the coupling 26, and then the magnetic stirrer 22 is driven to rotate by the magnet 25 to realize the stirring of the solution.

[0034] As a preferred implementation in this embodiment, it should be further noted that the module fixing frame 16 is connected to the module outer cover 4 and both are made of non-magnetic materials. A plurality of small holes for heat dissipation are provided on the module outer cover 4 to avoid affecting the magnetic stirrer 22. Making small holes on the module outer cover 4 can accelerate the heat dissipation speed.

[0035] As a preferred implementation in this embodiment, it should be further noted that the lower end on one side of the quartz glass cup 20 is connected to a glass cup adapter 24 through an adapter reinforcement nut 23 to ensure the stability of the glass cup adapter 24. The glass cup adapter 24 is connected to a drain pipe 13, and the liquid inside the quartz glass cup can be discharged through the drain pipe.

[0036] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not intended to limit the protection scope of the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A permanganate index titration module, characterized in that It includes a quartz glass cup (20) installed on a module fixing bracket (16) and a glass cup cover (18) installed at the upper end of the quartz glass cup (20). A burette (8), a liquid inlet pipe (9), and an OPR electrode (1) for detecting the potential in the solution are installed on the glass cup cover (18); a heating wire (14) is wound around the outer surface of the quartz glass cup (20), and a temperature sensor (21) is embedded and installed inside the quartz glass cup (20); a cooling fan (11) for quickly dissipating heat from the quartz glass cup (20) is installed on the module fixing bracket (16); a magnetic stirrer (22) is arranged on the inner bottom surface of the quartz glass cup (20), and a driving mechanism installed on the module fixing bracket (16) is arranged below the quartz glass cup (20) for controlling the magnetic stirrer (22) to stir the solution in the quartz glass cup (20) through the driving mechanism.

2. The permanganate index titration module according to claim 1, characterized in that, An outwardly extending annular cup rim is provided at the upper end of the quartz glass cup (20). The lower end of the annular cup rim is lapped on the module fixing bracket (16), and a glass cup gasket (19) made of polytetrafluoroethylene material is arranged between the annular cup rim and the module fixing bracket (16).

3. A permanganate index titration module according to claim 1, characterized in that A first through hole for installing the OPR electrode (1) is formed in the glass cup cover (18). Two annular grooves are arranged inside the first through hole, and electrode sealing rings (17) for strengthening the sealing between the OPR electrode (1) and the glass cup cover (18) are arranged in both annular grooves.

4. A permanganate index titration module according to any one of claims 1-3, characterized in that, A thermometer installation groove recessed towards the middle of the quartz glass cup (20) is provided on the side wall of one side of the quartz glass cup (20). The temperature sensor (21) is installed in the thermometer installation groove; the lower end of the OPR electrode (1) is arranged close to the thermometer installation groove, and both the thermometer installation groove and the OPR electrode (1) are located above the magnetic stirrer (22).

5. A permanganate index titration module according to claim 1, characterized in that, A second through hole is formed in the glass cup cover (18), and a condenser joint (6) is fixedly installed in the second through hole. The upper end of the condenser joint (6) is connected to a condenser pipe (7), the upper part of the condenser pipe (7) is sleeved with a condenser (3), and a condenser fixing bracket (2) is installed outside the condenser (3).

6. A permanganate index titration module according to claim 1, characterized in that, A glass cup cover fixing piece (15) is provided at the upper end of the glass cup cover (18), and the glass cup cover fixing piece (15), the glass cup cover (18), and the module fixing bracket (16) are connected by screws.

7. A permanganate index titration module according to claim 1, characterized in that, There are two cooling fans (11). The outlets of the two cooling fans (11) face the quartz glass cup (20) and are both installed on a frame-shaped fixing plate (12), and the frame-shaped fixing plate (12) is fixedly connected to the rear side of the module fixing bracket (16).

8. A permanganate index titration module according to claim 1, characterized in that, The driving mechanism includes a motor (28), a coupling (26), and a magnet (25). A motor fixing plate (27) is installed on the module fixing bracket (16). The motor (28) is installed on the motor fixing plate (27). The motor shaft of the motor (28) is arranged close to the quartz glass cup (20) and is fixedly connected to the coupling (26). The magnet (25) is located on the coupling (26), and the magnet (25) is eccentrically arranged with respect to the motor shaft of the motor (28).

9. A permanganate index titration module according to claim 1, characterized in that, The module fixing bracket (16) is connected to the module outer cover (4), and both are made of non-magnetic materials. A plurality of small holes for heat dissipation are provided on the module outer cover (4).

10. A permanganate index titration module according to claim 1, characterized in that, At the lower end on one side of the quartz glass cup (20), a glass cup adapter (24) is connected through an adapter reinforcing nut (23), and the glass cup adapter (24) is connected to a drain pipe (13).

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