Automatic titration device for full-automatic COD (Chemical Oxygen Demand) tester

Abstract

The utility model discloses an automatic titration device for a full-automatic COD (Chemical Oxygen Demand) determinator, which comprises a working table, a fixed frame, a telescopic driving mechanism and a motor sliding rail, a positioning frame is connected in the top of the working table, and the fixed frame is connected with the top of the positioning frame. According to the utility model, by arranging the infrared sensor, the infrared sensor is used for sensing a reagent dripped from the burette body, one time of sensing is performed when one drop of reagent drips, the titration quantity of the reagent in each test tube is recorded through the controller, and when the titration quantity of the reagent in the test tube reaches a set quantity, the test tube stops titration; the controller controls the movable sliding block to slide along the motor sliding rail to move the burette body to the position above the next test tube, then titration of the next test tube is started, the titration recording mode is the same as the previous titration recording mode, and therefore automatic titration is achieved, manual titration is avoided, the detection efficiency is improved, the titration number is completely consistent with the set number, and the detection efficiency is improved. And errors are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic titration devices, in particular to an automatic titration device used for a full-automatic COD measuring instrument. Background Art

[0002] COD tester is a chemical oxygen demand tester. It uses cold light source display technology, and the life of the light source lamp is as long as 100,000 hours. The switching of the measurement parameter optical path is changed from manual to automatic, eliminating the error factor of human rotation.

[0003] During the detection and use of the fully automatic COD analyzer, a burette is often used to drip a certain amount of reagent into a test tube containing a solution. Usually, several test tubes contain the same solution, but the amount of reagent that needs to be dripped is different.

[0004] The existing method is for the experimenter to manually control the amount of reagent dripped into the burette. This titration method is laborious, affects the detection efficiency, and is prone to errors. If the experimenter is not careful, the amount of reagent dripped may be too much or too little, resulting in inaccurate detection.

[0005] Secondly, the existing direct placement method for test tubes is not stable enough. The solution dripping is often unstable due to tilting, and the size of the positioning holes is fixed, which cannot be applied to the placement of test tubes of different specifications and needs to be developed urgently. Utility Model Content

[0006] The utility model aims to provide an automatic titration device for a fully automatic COD measuring instrument to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an automatic titration device for a fully automatic COD measuring instrument, comprising a workbench, a fixed frame, a telescopic driving mechanism and a motor slide rail, wherein a positioning frame is connected to the top of the workbench, a fixed frame is connected to the top of the positioning frame, corresponding holes are connected to the inside of the fixed frame at equal intervals, an infrared sensor is arranged on one side of the corresponding hole, telescopic driving mechanisms are symmetrically installed on both sides of the workbench, a cross frame is connected to the top of the two telescopic driving mechanisms, a motor slide rail is connected to the bottom of the cross frame, a moving slider is arranged outside the end of the motor slide rail, a support frame is connected to the bottom of the moving slider, a burette body is arranged inside the support frame, and an electric control valve is installed at the bottom end of the burette body.

[0008] Preferably, a controller is disposed inside the workbench, and a control panel is disposed on the surface of the workbench.

[0009] Preferably, a shock-absorbing base pad is connected to the bottom of the positioning frame, and a placement frame is connected inside the positioning frame.

[0010] Preferably, placement holes are connected at equal intervals inside the placement rack, the placement holes are arranged at positions corresponding to the corresponding holes, and clamping pieces are symmetrically arranged inside the placement holes.

[0011] Preferably, movable grooves are symmetrically connected on both sides of the placement hole, the inner side of the movable groove is connected to a spring, the inside of the movable groove is connected to a connecting rod through the spring, and one side of the connecting rod is connected to the clamping piece.

[0012] Preferably, the control panel consists of a display screen and control buttons.

[0013] Preferably, the two sides of the movable groove are symmetrically connected to the limiting sliding grooves, the two sides of the end of the connecting rod are symmetrically connected to the limiting sliding blocks, and the limiting sliding blocks are slidably connected to the limiting sliding grooves.

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

[0015] (1) The automatic titration device for the fully automatic COD measuring instrument uses an infrared sensor to sense the reagent dripping from the burette body, and senses each drop once. The controller records the titration amount of the reagent in each test tube. When the titration amount of the reagent in the test tube reaches the set amount, the test tube stops titrating, and the controller controls the moving slider to slide along the motor slide rail to move the burette body to the top of the next test tube, and then starts titrating the next test tube. The titration recording method is the same as the previous one, thereby realizing automatic titration and avoiding manual titration, thereby improving the detection efficiency. In addition, the titration amount is completely consistent with the set amount, avoiding errors, thereby ensuring the accuracy of the detection data;

[0016] (2) The automatic titration device for the fully automatic COD measuring instrument includes a start button, an off button, a drop number setting button, a burette movement setting button, a burette lifting setting button and a reset button in the control buttons. The drop number setting button is used to set the number of drops of reagent to be dripped into each test tube on the placement rack. The burette lifting setting button and the burette movement setting button are used to set the distance from the lower end of the burette to the test tube mouth and the moving distance after each titration is completed. Specifically, the controller is used to control the telescopic drive mechanism to extend and retract to adjust the height of the burette body, and the moving slider is controlled to slide along the motor slide rail to adjust the left and right movement of the burette body. The specific data is centrally displayed on the display screen, which is convenient for the staff to operate and view the records;

[0017] (3) This automatic titration device for a fully automatic COD measuring instrument, through the coordinated use of a limit slider, a spring and a limit slide pair, realizes that two clamping pieces can automatically clamp and fix test tubes of different diameters and specifications, and can always maintain a stable clamping force, which is also convenient for subsequent picking and placing work. The setting of the shock-absorbing bottom pad can provide a good shock-absorbing support for the bottom of the test tube, improve the protection, and the structural setting is convenient for the operation of titration reagents in test tubes of different specifications, thereby improving the practicality of the device structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0019] Figure 2 For this utility model Figure 1 The enlarged structural diagram at A in the middle;

[0020] Figure 3 It is a top view structural diagram of the connection between the positioning frame and the shock-absorbing base pad, the placement frame and the clamping piece of the utility model;

[0021] Figure 4 For this utility model Figure 3 The enlarged structural diagram at B in the middle;

[0022] Figure 5 It is a schematic diagram of the top view of the connection structure of the positioning frame and the fixing frame of the utility model.

[0023] In the figure: 1. workbench; 2. positioning frame; 3. shock-absorbing base pad; 4. placement frame; 401. placement hole; 5. clamping piece; 6. fixing frame; 601. corresponding hole; 7. infrared sensor; 8. telescopic drive mechanism; 9. cross frame; 10. motor slide rail; 11. moving slider; 12. support frame; 13. burette body; 14. electric control valve; 15. controller; 16. control panel; 1601. display screen; 1602. control button; 17. movable slot; 1701. limit slide slot; 18. spring; 19. connecting rod; 1901. limit slide. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-5The utility model provides an embodiment: an automatic titration device for a fully automatic COD measuring instrument, comprising a workbench 1, a fixing frame 6, a telescopic driving mechanism 8 and a motor slide rail 10, a positioning frame 2 is connected to the top of the workbench 1, a shock-absorbing bottom pad 3 is connected to the bottom of the positioning frame 2, and a placing frame 4 is connected to the inside of the positioning frame 2. The setting of the shock-absorbing bottom pad 3 can play a good shock-absorbing supporting role on the bottom of the test tube, thereby improving the protection;

[0026] The top of the positioning frame 2 is connected to a fixing frame 6, and corresponding holes 601 are connected to the inside of the fixing frame 6 at equal intervals. An infrared sensor 7 is provided on one side of the corresponding hole 601. The infrared sensor 7 is used to sense the reagent dripping from the burette body 13, and the infrared sensor 7 is sensed once for each drop.

[0027] Telescopic drive mechanisms 8 are symmetrically installed on both sides of the workbench 1, the tops of the two telescopic drive mechanisms 8 are connected to cross frames 9, the bottoms of the cross frames 9 are connected to motor slide rails 10, a moving slider 11 is arranged outside the end of the motor slide rail 10, the bottom of the moving slider 11 is connected to a support frame 12, a burette body 13 is arranged inside the support frame 12, and an electric control valve 14 is installed at the bottom end of the burette body 13.

[0028] A controller 15 is provided inside the workbench 1, and a control panel 16 is provided on the surface of the workbench 1. The controller 15 is used to record the titration amount of the reagent in each test tube. When the titration amount of the reagent in the test tube reaches the set amount, the test tube stops titrating, and the controller 15 controls the moving slider 11 to slide along the motor slide rail 10 to move the burette body 13 to the top of the next test tube, and then the titration of the next test tube is started;

[0029] The controller 15 is used to control the telescopic drive mechanism 8 to extend and retract to adjust the height of the burette body 13, and the movable slider 11 is controlled to slide along the motor slide rail 10 to adjust the left and right movement of the burette body 13;

[0030] The infrared sensor 7 , the electric control valve 14 , the motor slide rail 10 and the telescopic driving mechanism 8 are all electrically controlled and connected to the controller 15 .

[0031] The placement rack 4 has placement holes 401 connected at equal intervals inside. The placement holes 401 correspond to the positions of the corresponding holes 601 . The placement holes 401 are symmetrically provided with clamping pieces 5 inside.

[0032] The two sides of the placement hole 401 are symmetrically connected with movable grooves 17, and the two sides of the movable grooves 17 are symmetrically connected with limited sliding grooves 1701. The two sides of the end of the connecting rod 19 are symmetrically connected with limited sliders 1901. The limited sliders 1901 are slidably connected with the limited sliding grooves 1701. The limited sliders 1901, the springs 18 and the limited sliding grooves 1701 are used in coordination, so that the two clamping pieces 5 can automatically clamp and fix test tubes of different diameters and specifications, and can always maintain a stable clamping force, which is also convenient for subsequent taking and placing work;

[0033] The inner side of the movable groove 17 is connected with a spring 18 , and the interior of the movable groove 17 is connected with a connecting rod 19 through the spring 18 , and one side of the connecting rod 19 is connected to the clamping member 5 .

[0034] The control panel 16 is composed of a display screen 1601 and control buttons 1602, wherein the control buttons 1602 include a start button, an off button, a drop number setting button, a burette movement setting button, a burette lifting setting button, and a reset button;

[0035] The specific data is centrally displayed on the display screen 1601, which is convenient for the staff to operate and view the records.

[0036] When the embodiment of the present application is used, first, the number of drops of reagent to be dripped into each test tube on the placement rack 4 is set by the drop number setting button, and the start button is pressed to control the telescopic drive mechanism 8 to drive through the controller 15 to lift the burette body 13 to the set height, and then the moving slider 11 is controlled to slide along the motor slide rail 10 to move the burette body 13 to the first test tube to be titrated on the placement rack 4, and then the electric control valve 14 is controlled to open to start the titration of the first test tube, and the reagent dripped by the burette is sensed by the infrared sensor 7, and each drop is sensed. The controller 15 records the titration amount of the reagent in each test tube once. When the titration amount of the reagent in the first test tube reaches the set amount, the controller 15 controls the electric control valve 14 to close, thereby completing the titration of the first test tube. The controller 15 controls the burette body 13 to move to the top of the second test tube, opens the electric control valve 14, and starts the titration of the second test tube. The operation is carried out in this way. When the titration of all the test tubes is completed, press the close button to automatically return the burette to the initial position. If you want to clear the titration data, press the reset button.

Claims

1. An automatic titration device for a fully automatic COD measuring instrument, characterized in that: The invention comprises a workbench (1), a fixed frame (6), a telescopic drive mechanism (8) and a motor slide rail (10); the top of the workbench (1) is connected to a positioning frame (2); the top of the positioning frame (2) is connected to a fixed frame (6); the inside of the fixed frame (6) is connected to corresponding holes (601) at equal intervals; one side of the corresponding hole (601) is provided with an infrared sensor (7); the two sides of the workbench (1) are symmetrically installed with telescopic drive mechanisms (8); the tops of the two telescopic drive mechanisms (8) are connected to a cross frame (9); the bottom of the cross frame (9) is connected to a motor slide rail (10); a moving slider (11) is arranged outside the end of the motor slide rail (10); the bottom of the moving slider (11) is connected to a support frame (12); a burette body (13) is arranged inside the support frame (12); and an electric control valve (14) is installed at the bottom of the burette body (13).

2. The automatic titration device for a fully automatic COD measuring instrument according to claim 1, characterized in that: A controller (15) is arranged inside the workbench (1), and a control panel (16) is arranged on the surface of the workbench (1).

3. The automatic titration device for a fully automatic COD measuring instrument according to claim 1, characterized in that: The bottom of the positioning frame (2) is connected to a shock-absorbing base pad (3), and the interior of the positioning frame (2) is connected to a placement frame (4).

4. The automatic titration device for a fully automatic COD measuring instrument according to claim 3, characterized in that: The interior of the placement rack (4) is connected with placement holes (401) at equal intervals, the placement holes (401) are arranged at positions corresponding to the corresponding holes (601), and clamping pieces (5) are symmetrically arranged inside the placement holes (401).

5. The automatic titration device for a fully automatic COD measuring instrument according to claim 4, characterized in that: The two sides of the placement hole (401) are symmetrically connected with movable grooves (17), the inner side of the movable groove (17) is connected with a spring (18), the inside of the movable groove (17) is connected with a connecting rod (19) through the spring (18), and one side of the connecting rod (19) is connected to the clamping piece (5).

6. The automatic titration device for a fully automatic COD measuring instrument according to claim 2, characterized in that: The control panel (16) is composed of a display screen (1601) and control buttons (1602).

7. The automatic titration device for a fully automatic COD measuring instrument according to claim 5, characterized in that: The two sides of the movable groove (17) are symmetrically connected to the limiting sliding groove (1701), and the two sides of the end of the connecting rod (19) are symmetrically connected to the limiting sliding block (1901), and the limiting sliding block (1901) is slidably connected to the limiting sliding groove (1701).

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