Viscosity testing tool for fumed silica dispersion liquid

Abstract

A fumed silica dispersion liquid viscosity testing tool comprises a liquid taking pipe connected with a preparation tank and a viscosity testing pipe connected with the liquid taking pipe, the viscosity testing pipe is fixed to the side face of the preparation tank through a fixing support, the viscosity testing pipe comprises a pipe body, the upper end of the pipe body is provided with a gas outlet, and the lower end of the pipe body is provided with a testing pipe outlet. A material receiving box is arranged on the lower portion of an outlet of the test tube, a section, close to the air outlet, of a tube body expands outwards to form a hollow ball, a transition connecting tube section is arranged between the air outlet and the hollow ball, a limiter is arranged at the air outlet and comprises a limiting ball and a limiting rod, and the limiting rod comprises a vertical rod part connected with the limiting ball and a transverse rod part connected with the vertical rod part. The cross rod part is arranged outside the air outlet; a top pneumatic valve is arranged on the liquid taking pipe, a bottom pneumatic valve and a bottom infrared sensor are arranged at an outlet of the testing pipe, and a top infrared sensor is arranged at the upper part of the viscosity testing pipe. According to the utility model, quantitative measurement can be quickly carried out, and the state of dispersion liquid can be timely judged.

Description

Technical Field

[0001] The utility model relates to the field of lead-acid batteries, in particular to a tool for testing the viscosity of a gas-phase silicon dioxide dispersion. Background Art

[0002] Currently, more and more batteries use fumed silica as an additive. The usual method is to purchase fumed silica dispersion from outside. However, since fumed silica dispersion has high requirements for storage temperature, the temperature is difficult to control during the purchase and transportation process. In order to control the consistency of battery quality, battery factories have turned to self-prepared dispersion.

[0003] In the preparation process of fumed silica dispersion, in order to determine the dispersion effect, it is usually necessary to monitor the viscosity state of the fumed silica dispersion so as to make timely adjustments. At present, some manufacturers use the falling ball method for testing, while others purchase expensive viscosity testers for testing. In all the above tests, the dispersion needs to be taken out and added to the tester for measurement. The delay in test results cannot provide timely guidance for adjustments in the preparation process. Summary of the invention

[0004] The purpose of the utility model is to provide a fumed silica dispersion viscosity test tool to address the above-mentioned deficiencies, which can achieve rapid quantitative measurement and timely determine the state of the dispersion.

[0005] The technical solution of the utility model is as follows: it comprises a liquid taking pipe connected with the preparation tank, a viscosity testing pipe connected with the liquid taking pipe, the viscosity testing pipe is fixed to the side of the preparation tank through a fixed support, the viscosity testing pipe comprises a pipe body, the upper end of the pipe body is an air outlet, the lower end of the pipe body is an outlet of the testing pipe, a material receiving box is arranged at the lower part of the outlet of the testing pipe, a section of the pipe body close to the air outlet is expanded outward to form a hollow ball, a transition connecting pipe section is arranged between the air outlet and the hollow ball, a stopper is arranged at the air outlet, the stopper comprises a stopper ball and a stopper rod arranged in the hollow ball, the stopper rod comprises a vertical rod part connected with the stopper ball, a horizontal rod part connected with the vertical rod part, the vertical rod part can freely enter and exit the transition connecting pipe section, and the horizontal rod part is arranged outside the air outlet; a top pneumatic valve is arranged on the liquid taking pipe, a bottom pneumatic valve and a bottom infrared sensor are arranged at the outlet of the testing pipe, and a top infrared sensor for detecting the position of the horizontal rod part is arranged at the upper part of the viscosity testing pipe.

[0006] The side wall of the preparation tank is provided with more than two liquid taking ports from top to bottom, one end of each liquid taking branch pipe is installed at the liquid taking port in turn, the other end of each liquid taking branch pipe is connected to the liquid taking pipe through a pipeline connector, and valves are installed on the liquid taking branch pipes.

[0007] There are three liquid inlets, namely, an upper liquid inlet A, a middle liquid inlet B, and a lower liquid inlet C, and the pipeline connecting piece is a four-way pipe.

[0008] The bottom infrared sensor is an infrared timing sensor, and the top infrared sensor is an infrared alarm.

[0009] It also includes a controller connected to the top pneumatic valve, the bottom pneumatic valve, the bottom infrared sensor and the top infrared sensor. The controller is provided with a feed switch for controlling the action of the top pneumatic valve and a test switch for controlling the action of the bottom pneumatic valve.

[0010] The side wall of the preparation tank is provided with more than two liquid intake ports from top to bottom, one end of each liquid intake branch pipe is installed at the liquid intake port in turn, the other end of each liquid intake branch pipe is connected to the liquid intake pipe through a pipeline connector, and valves connected to the controller are respectively installed on the liquid intake branch pipe.

[0011] The controller is provided with a time display for displaying the time length of time that the bottom infrared sensor senses the liquid flow.

[0012] The viscosity testing tube is made of transparent material.

[0013] During the preparation of the dispersion, a small amount of dispersion is controlled by a controller to enter a viscosity test tube connected to the preparation tank, and the flow time of the dispersion is measured by an infrared sensor. According to the recorded time, the viscosity of the dispersion is determined by referring to the comparison table of flow time and viscosity, and an alkaline additive is added to the dispersion in time to adjust the pH value of the dispersion to adjust the viscosity of the dispersion. The utility model can realize rapid measurement, is easy to operate, and can quickly make quantitative determinations of the viscosity of the dispersion. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model (initial state);

[0015] Figure 2 It is a structural schematic diagram of the utility model (feeding state);

[0016] Figure 3 It is a structural schematic diagram of the utility model (testing state);

[0017] Figure 4 This is a schematic diagram of the installation of three liquid extraction branches;

[0018] Among them: 1. Preparation tank; 2. Dispersion; 3. Viscosity test tube; 4. Fixed support; 5. Hollow ball; 6. Test tube outlet; 7. Top pneumatic valve; 8. Bottom pneumatic valve; 9. Limiter; 10. Limit ball; 11. Limit rod; 12. Bottom infrared sensor; 13. Top infrared sensor; 14. Controller; 15. Time display; 16. Feed switch; 17. Test switch; 18. Material receiving box; 19. Liquid taking pipe; 20. Valve. DETAILED DESCRIPTION

[0019] This tool mainly includes two parts: the viscosity testing part and the control part. The viscosity testing part includes a viscosity testing tube 3, and the viscosity testing tube 3 includes a hollow ball 5 at the top and a test tube outlet 6 at the bottom. The upper part of the viscosity testing tube 3 is connected to the preparation tank 1, and the bottom is connected with a fixed support 4. The control part includes a top pneumatic valve 7, a bottom pneumatic valve 8, a top infrared sensor 13, and a bottom infrared sensor 12. The top pneumatic valve 7, the bottom pneumatic valve 8, the bottom infrared sensor 12, and the top infrared sensor 13 can all be manually controlled. The top infrared sensor 13 is an infrared alarm, and the bottom infrared sensor 12 is an infrared timing sensor.

[0020] As a preferred embodiment, the control part also includes a controller 14, and the top pneumatic valve 7, the bottom pneumatic valve 8, the bottom infrared sensor 12, and the top infrared sensor 13 are all connected to the controller 14 through control lines. The controller 14 also includes a feed switch 16, a test switch 17 and a time display 15. The viscosity test tube 3 is made of transparent material. The diameter of the test tube outlet 6 at the bottom of the viscosity test tube 3 is 4 mm.

[0021] in Figure 1 In its initial state, the interior of the viscosity test tube 3 is empty and there is no dispersion 2; the top pneumatic valve 7 and the bottom pneumatic valve 8 are both in a closed state, the limit ball 10 on the limiter 9 does not contact the hollow ball 5 on the top of the viscosity test tube 3, and the air inside the viscosity test tube 3 can flow from the top.

[0022] Figure 2 It is in the feeding state. At this time, the feeding switch 16 on the controller 14 is pressed. The controller 14 controls the top pneumatic valve 7 to open, and the dispersion 2 in the preparation tank 1 enters the viscosity testing tube 3. When the dispersion 2 gradually rises and contacts the stopper 9, the buoyancy will push the stopper 9 to rise until the stopper ball 10 on the stopper 9 contacts the hollow ball 5, which is equivalent to self-locking to prevent the dispersion 2 from escaping from the top. At the same time, the top infrared sensor 13 will sense the stopper rod 11 on the stopper 9. After the signal is transmitted to the controller 14, the controller 14 controls the top pneumatic valve 7 to close and stop feeding.

[0023] Figure 3In the test state, after the feeding is completed, the test switch 17 on the controller 14 is pressed, and the controller 14 opens the bottom pneumatic valve 8, and the dispersion 2 flows out from the test tube outlet 6 at the bottom of the viscosity test tube 3 to the bottom receiving box 18. At this time, the bottom infrared sensor 12 located near the test tube outlet 6 senses the liquid flow and starts timing. When the dispersion 2 in the viscosity test tube 3 flows out completely, the bottom infrared sensor 12 senses that the liquid flow stops and stops timing. At this time, the time display screen 15 on the controller 14 displays the test results, and controls the bottom pneumatic valve 8 to open at the same time.

[0024] Figure 4 In the figure, three liquid taking ports are arranged in sequence from top to bottom on the side wall of the preparation tank 1, namely, the upper liquid taking port A, the middle liquid taking port B, and the lower liquid taking port C. One end of the three liquid taking branch pipes is installed at the liquid taking ports in sequence, and the other end of the three liquid taking branch pipes is connected to the liquid taking pipe 19 through a four-way pipe. The liquid taking branch pipes are respectively equipped with valves 20 connected to the controller 14. By setting three liquid taking ports, the switch states of the valves at different liquid taking ports are controlled to sample the dispersion at different liquid levels and perform viscosity determination.

Claims

1. A tool for testing the viscosity of fumed silica dispersion, characterized in that: The invention comprises a liquid taking pipe connected to the preparation tank (1), and a viscosity test tube (3) connected to the liquid taking pipe. The viscosity test tube (3) is fixed to the side of the preparation tank (1) via a fixed support (4). The viscosity test tube (3) comprises a tube body. The upper end of the tube body is an air outlet. The lower end of the tube body is a test tube outlet (6). A material receiving box (18) is provided at the lower part of the test tube outlet (6). A section of the tube body near the air outlet expands outward to form a hollow ball (5). A transition connecting pipe section is provided between the air outlet and the hollow ball (5). A stopper is provided at the air outlet. (9), the limiter (9) comprises a limit ball (10) and a limit rod (11) placed in the hollow ball (5), the limit rod comprising a vertical rod portion connected to the limit ball (10) and a horizontal rod portion connected to the vertical rod portion, the vertical rod portion can freely enter and exit the transition connection pipe section, and the horizontal rod portion is placed outside the air outlet; a top pneumatic valve (7) is installed on the liquid taking pipe, a bottom pneumatic valve (8) and a bottom infrared sensor are installed at the outlet (6) of the test tube, and a top infrared sensor for detecting the position of the horizontal rod portion is provided on the upper part of the viscosity test tube (3).

2. The fumed silica dispersion viscosity testing tool according to claim 1, characterized in that: The side wall of the preparation tank (1) is provided with more than two liquid taking ports in sequence from top to bottom, one end of each liquid taking branch pipe is installed at the liquid taking port in sequence, the other end of each liquid taking branch pipe is connected to the liquid taking pipe via a pipeline connector, and valves are respectively installed on the liquid taking branch pipes.

3. The fumed silica dispersion viscosity testing tool according to claim 2, characterized in that: There are three liquid inlets, namely, an upper liquid inlet A, a middle liquid inlet B, and a lower liquid inlet C, and the pipeline connecting piece is a four-way pipe.

4. The fumed silica dispersion viscosity testing tool according to claim 1, characterized in that: The bottom infrared sensor is an infrared timing sensor, and the top infrared sensor is an infrared alarm.

5. The fumed silica dispersion viscosity testing tool according to claim 1, characterized in that: The device also includes a controller (14) connected to the top pneumatic valve (7), the bottom pneumatic valve (8), the bottom infrared sensor, and the top infrared sensor. The controller (14) is provided with a feed switch (16) for controlling the operation of the top pneumatic valve (7) and a test switch for controlling the operation of the bottom pneumatic valve (8).

6. The fumed silica dispersion viscosity testing tool according to claim 5, characterized in that: The side wall of the preparation tank (1) is provided with two or more liquid intake ports in sequence from top to bottom, one end of each liquid intake branch pipe is installed at the liquid intake port in sequence, the other end of each liquid intake branch pipe is connected to the liquid intake pipe via a pipeline connector, and the liquid intake branch pipe is respectively provided with a valve connected to the controller (14).

7. The fumed silica dispersion viscosity testing tool according to claim 5, characterized in that: The controller (14) is provided with a time display (15) for displaying the length of time the bottom infrared sensor senses the liquid flow.

8. The fumed silica dispersion viscosity testing tool according to claim 1, characterized in that: The viscosity testing tube (3) is made of transparent material.

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