Multi-range multi-gear flow-adjustable automatic return-to-zero burette

Abstract

The utility model belongs to the technical field of inspection and assay, and particularly relates to a multi-range multi-gear flow-adjustable automatic zeroing burette, which is characterized by comprising a burette, a standard solution injection port arranged at the upper part of the burette, and a 50mL automatic zeroing port and a 25mL automatic zeroing port which are arranged on the burette from top to bottom, the connector is arranged at the bottom of the burette, and the trace rotating head and the normal rotating head are arranged in the connector. According to the utility model, the operation difficulty and the labor intensity of inspection and test personnel are reduced, one tube has multiple purposes, automatic zero setting is realized, the inspection and test working efficiency and accuracy of a titration method are further improved, the working and production efficiency is improved, and related industries obtain the best economic benefits.

Description

Technical Field

[0001] The utility model belongs to the technical field of inspection and testing, and particularly relates to a multi-range and multi-gear flow adjustable automatic zeroing burette. Background Art

[0002] In the process of inspection and testing in the iron ore mining industry, the contents of indicators such as total iron, ferrous iron, magnetic iron and silicon dioxide are the basis for evaluating the quality of iron concentrate, pellet and sinter. At present, the determination of these indicators usually adopts the traditional manual chemical titration method and the advanced fluorescence analysis method. The traditional manual chemical titration method is the basic analysis method and also the premise and benchmark for the inspection and testing analysis of the advanced instrument and equipment, the fluorescence analyzer. In the traditional manual chemical titration method, the burette is the main measuring instrument. In the large-scale production process of iron ore mines, it is required to quickly and accurately issue process indicators and product indicators. Therefore, inspection and testing personnel need to master certain skills and proficiency in using the burette, especially the judgment of the titration end point. Only when the titration is just right can the experimental data be more accurate. The burettes used in the laboratory are all burettes with fixed milliliters, such as burettes of various specifications such as 50mL, 25mL, 10mL, etc. For samples with different contents, different specifications of burettes need to be used to measure the indicators. And at the end of the titration, due to the fixed titration port, the flow rate depends only on the operation method of the inspection and testing personnel. If the operation is improper or carelessly, it will be easy to add an excessive amount, resulting in a large data deviation and the need to re-measure. This not only occupies a large amount of laboratory space but also increases the labor intensity of the workers. In addition, the normal burette does not have an automatic zeroing function, and the workers need to manually zero it, which also increases the workload of the workers. To sum up, to solve the above problems, it is necessary to research a multi-range and multi-gear flow adjustable automatic zeroing burette to reduce the operation difficulty and labor intensity of inspection and testing personnel, realize multi-purpose use of one burette and automatic zeroing, and further improve the inspection and testing work efficiency and accuracy of the titration method, improve the work production efficiency, and enable the relevant industries to obtain the best economic benefits. Summary of the Invention

[0003] The purpose of the utility model is to provide a multi-range and multi-gear flow adjustable automatic zeroing burette, which solves the problems such as high difficulty in determining the titration end point, large labor intensity, high requirement for the skill level of inspection and testing personnel, frequent replacement of burettes for different sample contents, and large operation errors in the process of titration analysis experiment using the burette. Finally, it achieves the effects of reducing the operation difficulty and labor intensity of inspection and testing personnel, realizing multi-purpose use of one burette and automatic zeroing, further improving the inspection and testing work efficiency and accuracy of the titration method, improving the work production efficiency, and enabling the relevant industries to obtain the best economic benefits.

[0004] The purpose of the utility model is achieved by the following technical solutions:

[0005] The multi-range and multi-gear flow adjustable automatic zeroing burette of the present utility model is characterized by comprising a burette, a standard solution injection port arranged at the upper part of the burette, a 50 mL automatic zeroing port and a 25 mL automatic zeroing port arranged on the burette from top to bottom, a connector arranged at the bottom of the burette, a micro rotary head and a normal rotary head arranged in the connector.

[0006] The micro rotary head includes a rotary head body, a micro titration rotary head arranged at the front end of the rotary head body, a micro titration fixed card slot arranged at the rear end of the rotary head body, a micro titration micropore and a micro titration normal hole arranged on the rotary head body, a full flow prompt arranged on the end face of the micro titration rotary head, a zero titration flow prompt arranged on the end face of the micro titration rotary head, and a half flow prompt arranged on the end face of the micro titration rotary head.

[0007] The normal rotary head includes a rotary head and a titration hole.

[0008] Advantages of the present utility model:

[0009] The multi-range and multi-gear flow adjustable automatic zeroing burette of the present utility model reduces the operation difficulty and labor intensity of inspection and testing personnel, realizes multiple uses with one tube and automatic zeroing, further improves the inspection and testing work efficiency and accuracy of titration method, improves the work production efficiency, and enables the relevant industries to obtain the best economic benefits. Description of the drawings

[0010] Figure 1 is a schematic structural diagram of the present utility model.

[0011] Figure 2 is of the present utility model Figure 1 exploded view.

[0012] Figure 3 is an exploded view of the micro rotary head of the present utility model.

[0013] Figure 4 is another exploded view of the micro rotary head of the present utility model.

[0014] Figure 5 is of the present utility model Figure 3 left view.

[0015] Figure 6 is a schematic structural diagram of the normal rotary head of the present utility model. Detailed implementation manners

[0016] The following further describes the detailed implementation manners of the present utility model in conjunction with the drawings.

[0017] Such as Figures 1-6As shown in the figure, a multi-range and multi-gear flow adjustable automatic zeroing burette of the present utility model is characterized by comprising a burette, a standard solution injection port 6 provided at the upper part of the burette, a 50 mL automatic zeroing port 5 and a 25 mL automatic zeroing port 4 provided on the burette from top to bottom, a connector 3 provided at the bottom of the burette, a micro-rotating head 1 and a normal rotating head 2 provided in the connector 3.

[0018] The micro-rotating head 1 includes a rotating head main body, a micro-titration rotating head 1-1 provided at the front end of the rotating head main body, a micro-titration fixed card slot 1-3 provided at the rear end of the rotating head main body, a micro-titration micropore 1-2 and a micro-titration normal hole 1-4 provided on the rotating head main body, a full-flow opening prompt 1-5 provided on the end face of the micro-titration rotating head 1-1, a titration flow zero prompt 1-7 provided on the end face of the micro-titration rotating head 1-1, and a half-flow opening prompt 1-6 provided on the end face of the micro-titration rotating head 1-1.

[0019] The normal rotating head 2 includes a rotating head 2-1 and a titration hole 2-2.

[0020] The device includes a micro-rotating head 1, a normal rotating head 2, a connector 3, a 25 mL automatic zeroing port 4, a 50 mL automatic zeroing port 5, and a standard solution injection port 6. The micro-rotating head 1 is embedded in the normal rotating head 2 and is clamped in the normal rotating head 2 by a disc-shaped fixed card slot 1-3. The micro-rotating head 1 is specifically divided into three flow states, namely, fully open, half open, and closed states. Under normal conditions, the micro-rotating head 1 places the rotating handle in the fully open state and rotates with the normal rotating head 2. When approaching the titration end point, rotate the handle of the micro-rotating head 1 to the half-open state for titration, which is convenient for judging the titration end point; the normal rotating head 2 is specifically divided into two flow states, namely, fully open and closed states. When the handle of the normal rotating head 2 is in the vertical state, it is in the full-flow open state, and when it is in the horizontal state, it is in the closed state. The small-diameter side of the normal rotating head 2 is fixed by the handle of the micro-rotating head 1 to prevent it from falling off from the connector 3; the connector 3 and the burette are integrated, and the normal rotating head 2 can be freely separated from the burette; the left side of the burette is provided with a full-range scale, and a 0 mL marking port is set at the automatic zeroing position of the 25 mL burette on the right side to reset the range scale, and a 25 mL automatic zeroing port 4 is provided. When not in use, close the zeroing port tightly; a 50 mL automatic zeroing port is set at the 0 mL scale of the 50 mL burette. When not in use, close the zeroing port tightly; a standard solution injection port 6 is provided at the top of the burette to facilitate the addition of the standard titration solution into the burette.

[0021] The implementation mode of the present utility model is described in combination with the overall figure: for the multi-range and multi-gear flow-adjustable automatic zeroing burette, when the content of the sample to be measured is relatively low and the 25 mL burette is used to meet the measurement requirements, the standard titration solution is injected into the burette through the standard solution injection port 6. Open the 25 mL automatic zeroing port 4. When the standard titration solution is added to a position above the 0 mL scale of the 25 mL specification, stop injecting the standard titration solution, and automatically zero to the 0 mL of the 25 mL specification burette. Place the sample under the burette, open the normal rotating head 2, and perform titration. When titration reaches a certain level, switch the rotating head and use the micro rotating head 1 for titration. Rotate the micro rotating head 1 to the half-flow state to reduce the titration volume. When approaching the titration end point, quickly rotate the micro rotating head 1. When reaching the titration end point, close the micro rotating head 1, and the titration ends. Read and record the titration result.

[0022] When the content of the sample to be measured is relatively high and the 50 mL burette is used, tightly close the 25 mL automatic zeroing port 4. Inject the standard titration solution into the burette through the standard solution injection port 6. Open the 50 mL automatic zeroing port 5. When the standard titration solution is added to a position above the 0 mL scale of the 50 mL specification, stop injecting the standard titration solution, and automatically zero to the 0 mL of the 50 mL specification burette. Place the sample under the burette, open the normal rotating head 2, and perform titration. When titration reaches a certain level, switch the rotating head and use the micro rotating head 1 for titration. Rotate the micro rotating head 1 to the half-flow state to reduce the titration volume. When approaching the titration end point, quickly rotate the micro rotating head 1. When reaching the titration end point, close the micro rotating head 1, and the titration ends. Read and record the titration result.

Claims

1. A multi-range, multi-gear flow adjustable automatic zeroing burette, characterized in that The invention comprises a burette, a standard solution injection port arranged at the upper part of the burette, a 50mL automatic zero adjustment port and a 25mL automatic zero adjustment port arranged on the burette from top to bottom, a connector arranged at the bottom of the burette, and a micro-rotating head and a normal rotating head arranged in the connector.

2. The multi-range, multi-gear flow adjustable automatic zeroing burette according to claim 1 is characterized in that The micro-titration rotating head comprises a rotating head body, a micro-titration rotating head arranged at the front end of the rotating head body, a micro-titration fixing slot arranged at the rear end of the rotating head body, a micro-titration micro-hole and a micro-titration normal hole arranged on the rotating head body, a flow full-open prompt arranged on the end face of the micro-titration rotating head, a titration flow zero prompt arranged on the end face of the micro-titration rotating head, and a flow half-open prompt arranged on the end face of the micro-titration rotating head.

3. The multi-range, multi-gear flow adjustable automatic zeroing burette according to claim 1, characterized in that The normal rotating head comprises a rotating head and a titration hole.

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