A precision glass graduated cylinder

Abstract

This utility model relates to the field of glass graduated cylinder technology, specifically to a precision glass graduated cylinder, including a metering section, a base, an inlet tube, and an outlet tube. The base is fixedly connected to the lower surface of the metering section, and the inlet tube and outlet tube are respectively fixedly connected to the top of the metering section. The diameters of both the inlet tube and outlet tube are smaller than the diameter of the metering section, and graduations are engraved on the outer sides of both the inlet tube and outlet tube. This utility model provides a basic measurement of a fixed volume through the metering section, and, combined with the inlet and outlet tubes with diameters smaller than the metering section, achieves fine scale readings using the small tube diameters. It can accurately measure large volumes of non-standard liquids without using different graduated cylinders in stages, reducing the accumulation of errors caused by multiple liquid transfers. Furthermore, since the inlet and outlet tubes have equal diameters and are both engraved with graduations, the cylinder's tilt can be determined by observing whether the graduations are consistent, further ensuring the accuracy of the readings.

Description

Technical Field

[0001] This utility model relates to the field of glass measuring cylinder technology, specifically a precision glass measuring cylinder. Background Technology

[0002] In experimental fields such as chemistry, biology, and medicine, graduated cylinders are widely used as core tools for liquid volume measurement in scenarios such as solution preparation and reaction measurement. Currently, most glass graduated cylinders on the market are single-section straight cylinders with graduations evenly distributed along the cylinder wall. Their graduation accuracy is negatively correlated with the measuring range, that is, the larger the graduated cylinder and the thicker the tube diameter, the larger the minimum graduation value. For example, the smallest graduation of a 100mL graduated cylinder is usually 1mL, which leads to a significant increase in reading error when measuring large volumes of liquid. In actual operation, when it is necessary to measure non-standard volumes, experimenters often need to first use a large-capacity graduated cylinder to measure the integer part, and then use a small graduated cylinder to supplement the remaining volume. This step-by-step operation and multiple transfers of liquid will accumulate errors, and the coarse graduation design of large-capacity graduated cylinders is difficult to meet the needs of precise reading.

[0003] Therefore, a precision glass graduated cylinder is proposed to solve the problems mentioned above. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a precision glass graduated cylinder. It provides a fixed-capacity basic measurement through a quantitative section, and is equipped with an inlet and outlet pipe with diameters smaller than the quantitative section. The use of these smaller pipe diameters enables precise scale readings, allowing for accurate measurement of large-volume, non-standard liquids without the need for separate cylinders. This reduces the accumulation of errors caused by multiple liquid transfers. The inlet and outlet pipes have equal diameters and are both engraved with graduations. The cylinder's tilt can be determined by observing whether the graduations are consistent, further ensuring reading accuracy. This invention solves the problems mentioned in the background section.

[0005] To achieve the above objectives, this utility model provides the following technical solution: it includes a quantitative section, a base, a feed pipe, and a discharge pipe. The base is fixedly connected to the lower surface of the quantitative section, and the feed pipe and the discharge pipe are respectively fixedly connected to the top of the quantitative section. The diameters of the feed pipe and the discharge pipe are both smaller than the diameter of the quantitative section, and the outer sides of the feed pipe and the discharge pipe are engraved with scales.

[0006] Preferably, a feed funnel is connected to the top of the feed pipe, and a discharge funnel is connected to the top of the discharge pipe.

[0007] Preferably, the connection between the metering section and the discharge pipe is provided with a tapered opening with the larger end facing downwards.

[0008] Preferably, a cone-shaped block with its small end facing downwards is provided at the connection between the metering section and the feed pipe.

[0009] Preferably, the large end face of the conical block is lower than the large end face of the conical opening.

[0010] Preferably, the side of the feed funnel closest to the discharge funnel is fixedly connected to the discharge funnel.

[0011] Preferably, the feed pipe and the discharge pipe have the same diameter.

[0012] Compared with the prior art, the present invention provides a precision glass measuring cylinder, which has the following advantages: 1. A fixed-capacity basic measurement is provided through the quantitative segment. When paired with the feed and discharge pipes with diameters smaller than the quantitative segment, fine scale readings can be achieved using the small pipe diameter. This allows for accurate measurement of large-capacity non-standard volume liquids without the need to use different measuring cylinders in steps, reducing the accumulation of errors caused by multiple liquid transfers.

[0013] 2. The feed pipe and discharge pipe have the same diameter and are both engraved with graduations. By observing whether the graduations of the two are consistent, it can be determined whether the measuring cylinder is tilted, which further ensures the accuracy of the reading. The design of the conical mouth and conical block can promote the discharge of gas in the quantitative section and avoid air bubbles from affecting the measurement accuracy. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 An isometric structural schematic diagram of the precision glass measuring cylinder of this utility model; Figure 2 A front structural diagram of the precision glass measuring cylinder of this utility model; Figure 3 A cross-sectional structural schematic diagram of the precision glass measuring cylinder of this utility model; Figure 4 A schematic diagram of the top cross-sectional structure of the quantitative section of the precision glass graduated cylinder of this utility model.

[0015] In the diagram: 1. Quantitative section; 2. Base; 3. Feed pipe; 4. Discharge pipe; 101. Conical opening; 102. Conical block; 301. Feed funnel; 401. Discharge funnel. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Example: Please see Figure 1 - Figure 4 This embodiment of a precision glass graduated cylinder includes a metering section 1, a base 2, an inlet tube 3, and an outlet tube 4. The base 2 is fixedly connected to the lower surface of the metering section 1, and a larger base 2 contacts the placement surface. The metering section 1 is fixedly connected to the upper surface of the base 2, and the base 2 provides stable support for the overall structure. The metering section 1 has a fixed capacity, such as 100 ml, 300 ml, 500 ml, etc., serving as the basic capacity for liquid measurement. The inlet tube 3 and the outlet tube 4 are fixedly connected to the top of the metering section 1, respectively. The diameters of the inlet tube 3 and the outlet tube 4 are both smaller than the diameter of the metering section 1. The diameters of the inlet tube 3 and the outlet tube 4 are equal (for easy graduation). The outer sides of the inlet tube 3 and the outlet tube 4 are engraved with graduations. The diameters of the inlet tube 3 and the outlet tube 4 are smaller than the diameter of the metering section 1, making it easier to read more accurate graduations and accurately measure liquid volumes exceeding the fixed capacity of the metering section 1.

[0018] A feed funnel 301 is connected to the top of the feed pipe 3, and a discharge funnel 401 is connected to the top of the discharge pipe 4. The feed funnel 301 facilitates the addition of liquid from the feed inlet, while the discharge funnel 401 corresponds to the discharge outlet, which facilitates the discharge of gas. A conical opening 101 with its large end facing downwards is provided at the connection between the metering section 1 and the discharge pipe 4. A conical block 102 with its small end facing downwards is provided at the connection between the metering section 1 and the feed pipe 3. The large end face of the conical block 102 is lower than the large end face of the conical opening 101. The side of the feed funnel 301 closest to the discharge funnel 401 is fixedly connected to the discharge funnel 401 (for structural reinforcement). One side of the near-discharge funnel 401 is fixedly connected to the discharge funnel 401, which enhances the stability of the overall structure. Liquid is added from the feed funnel 301, and the gas in the metering section 1 is discharged from the discharge pipe 4. The conical mouth 101 and the conical block 102 facilitate the complete removal of gas in the metering section 1, avoiding gas residue from affecting the measurement results. By observing whether the scales of the feed pipe 3 and the discharge pipe 4 are equal, it can be determined whether the base 2 is tilted, ensuring that the measuring cylinder is in a horizontal state during measurement, ensuring the accuracy of the reading, thereby realizing the accurate measurement of large-capacity liquids and meeting the needs of accurate measurement of non-standard volume liquids in experiments.

[0019] The working principle of the above embodiment is as follows: relying on the quantitative section 1 to provide a fixed basic capacity, the feed pipe 3 and the discharge pipe 4 serve as fine measurement parts. The gas in the quantitative section 1 is discharged with the help of the conical mouth 101 and the conical block 102. The tilt is judged by the scale of the feed pipe 3 and the discharge pipe 4, thereby achieving accurate measurement. In use, the measuring cylinder is placed stably on the table through the large base 2. Liquid is added into the feed pipe 3 through the feed funnel 301. The liquid enters the quantitative section 1. The gas in the quantitative section 1 is discharged from the discharge pipe 4 under the action of the conical mouth 101 and the conical block 102. After the quantitative section 1 is full, the volume of the excess part is read according to the scale on the feed pipe 3. At the same time, the scale of the feed pipe 3 and the discharge pipe 4 are observed to confirm whether the measuring cylinder is tilted, so as to ensure that the measurement results are accurate and reliable.

[0020] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. As long as they can achieve their beneficial effects, they can be implemented. Therefore, this embodiment will not elaborate on their specific structural composition and working principle.

[0021] If certain terms are used in the specification and claims to refer to specific components, those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" as used throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to".

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A precision glass graduated cylinder, characterized in that: It includes a quantitative section (1), a base (2), a feed pipe (3) and a discharge pipe (4). The base (2) is fixedly connected to the lower surface of the quantitative section (1). The feed pipe (3) and the discharge pipe (4) are fixedly connected to the top of the quantitative section (1) respectively. The diameters of the feed pipe (3) and the discharge pipe (4) are both smaller than the diameter of the quantitative section (1). The outer sides of the feed pipe (3) and the discharge pipe (4) are engraved with scales.

2. The precision glass measuring cylinder according to claim 1, characterized in that: The top of the feed pipe (3) is connected to a feed funnel (301), and the top of the discharge pipe (4) is connected to a discharge funnel (401).

3. A precision glass measuring cylinder according to claim 1, characterized in that: The quantitative section (1) is provided with a tapered opening (101) with the large end facing downward at the connection between it and the discharge pipe (4).

4. A precision glass measuring cylinder according to claim 3, characterized in that: The connection between the quantitative section (1) and the feed pipe (3) is provided with a cone-shaped block (102) with its small end facing downward.

5. A precision glass measuring cylinder according to claim 4, characterized in that: The large end face of the conical block (102) is lower than the large end face of the conical opening (101).

6. A precision glass measuring cylinder according to claim 2, characterized in that: The feed hopper (301) is fixedly connected to the discharge hopper (401) on the side near the discharge hopper (401).

7. A precision glass measuring cylinder according to claim 1, characterized in that: The feed pipe (3) and the discharge pipe (4) have the same diameter.

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