Simple weighing apparatus

Abstract

The utility model provides a simple weighing appliance, include: hollow glass tube and rubber rubber head, rubber rubber head sets up in the top of hollow glass tube, hollow glass tube includes inner layer glass tube and outer layer glass tube, and the first part, second part and third part of inner layer glass tube are divided into from the bottom end to the top along the axial direction, and the junction of first part, second part and third part is smooth transition surface, and the inner diameter of first part is gradually increased from the bottom end to the top along the axial direction, and the inner diameter of second part is gradually reduced, and the inner diameter of third part is gradually increased, the bottom of hollow glass tube is bevel, and the first inclined plane is formed between outer layer glass tube and inner layer glass tube, and the opening of inner layer glass tube is second inclined plane, and the angle between first inclined plane and the axis of hollow glass tube is less than the angle between second inclined plane and the axis of hollow glass tube, simple weighing appliance is convenient for the extraction of trace powder, and avoids the powder sticking on simple weighing appliance.

Description

Technical Field

[0001] This utility model relates to the field of weighing instruments, specifically to a simple weighing instrument. Background Technology

[0002] Chinese patent CN208140232U discloses a weighing device for powdered samples. It includes a receiving section, a connecting section, and a pouring section. The side wall of the receiving section is connected and conductive to one end of the connecting section, and the other end of the connecting section is connected and conductive to the pouring section. The pouring section is conical, with a larger end connected to the connecting section and a smaller end away from the connecting section. The bottom of the receiving section and the connecting section is a flat surface for easy placement. The upper surface of the receiving section has a material inlet, and the end of the pouring section away from the connecting section is a material outlet. Because the pouring section is conical, the smaller end of the pouring section can extend into the volumetric flask, preventing the powder sample from scattering during pouring and causing inaccurate experimental results. For powdered samples that easily adhere to the flask walls, reagents can be used to wash the adhered powder sample into the volumetric flask, ensuring accurate experimental results.

[0003] However, the powder sample weighing instrument with publication number CN208140232U has many parts, and when powder samples adhere to it, the powder samples adhering to the wall need to be washed with reagents. Utility Model Content

[0004] In view of the deficiencies in the existing technology, the purpose of this utility model is to provide a simple weighing instrument.

[0005] A simple weighing instrument according to the present invention includes: a hollow glass tube and a rubber head; The rubber nozzle is disposed at the top of the hollow glass tube, and the rubber nozzle is used to provide airflow into the hollow glass tube; The hollow glass tube includes an inner glass tube and an outer glass tube. The inner glass tube is divided into a first part, a second part and a third part from the bottom end along the axial direction to the top end. The connection between the first part, the second part and the third part is a smooth transition surface. From the bottom end to the top end along the axial direction, the inner diameter of the first part gradually increases, the inner diameter of the second part gradually decreases, and the inner diameter of the third part gradually increases. The bottom end of the hollow glass tube is slanted, a first inclined surface is formed between the outer glass tube and the inner glass tube, and the opening of the inner glass tube is a second inclined surface. The angle between the first inclined surface and the axis of the hollow glass tube is smaller than the angle between the second inclined surface and the axis of the hollow glass tube.

[0006] Preferably, the length ratio of the first part, the second part, and the third part is 1:1:1.

[0007] Preferably, the ratio of the inner diameter of the widest part of the first part, the inner diameter of the narrowest part of the second part, and the inner diameter of the widest part of the third part is 4:1:3.

[0008] Preferably, the angle between the first inclined surface and the axis of the hollow glass tube is 15°, and the angle between the second inclined surface and the axis of the hollow glass tube is 45°.

[0009] Preferably, the surface of the hollow glass tube is coated with a silanized dimethyl film.

[0010] Preferably, helium gas is disposed between the outer glass layer and the inner glass layer.

[0011] Preferably, the outer surface of the outer glass layer is engraved with a capacity scale.

[0012] Preferably, the hollow glass tube is an inert glass tube.

[0013] Compared with the prior art, the present invention has the following beneficial effects: This invention provides airflow into the inner glass tube by pressing the rubber head, preventing powdered reagents from adhering to the inside of the inner glass tube and reducing loss of powdered reagents during weighing. Because the inner diameter of the second section of the inner glass tube gradually decreases and the inner diameter of the third section gradually increases, with a smaller inner diameter at the connection between the second and third sections, the airflow pressure is increased, making it easier for the powdered reagents to leave the hollow glass tube and enter the reagent bottle. The wide inner diameter of the first section of the inner glass tube facilitates cleaning of the weighing instrument after use, thus preventing reagent contamination. By designing the bottom of the hollow glass tube as a slanted opening, it facilitates the handling of trace amounts of powdered reagents. The slanted design reduces the contact area between the hollow glass tube surface and the reagent, minimizing electrostatic adsorption and contact adhesion effects between the weighing reagent and the weighing instrument, thus providing higher accuracy and repeatability for micro and ultra-micro weighing. The slanted design is also easier to clean, and point contact reduces the accumulation of contaminants. Furthermore, since the angle between the first inclined surface of the hollow glass tube and the axis of the hollow glass tube is smaller than the angle between the second inclined surface and the axis of the hollow glass tube, the angle between the first inclined surface and the axis is small, that is, the slope is small; making it easier for powder to enter the opening along the first inclined surface, and the hollow glass tube is convenient for taking out trace amounts of powder reagents. The connection between the first, second, and third parts is a smooth transition surface, which keeps the inner wall of the inner glass tube smooth at all times. When the powder enters the inner glass tube, the airflow carries the powder along the smooth inner wall and removes it from the simple weighing device. The powder will not remain in the tube, further preventing the powder from sticking to the inner glass tube wall. Attached Figure Description

[0014] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram illustrating the structure of a simple weighing instrument, which is the main feature of this utility model. Figure 2 This is a first-view structural diagram illustrating the bottom of the simple weighing instrument, which is the main feature of this utility model. Figure 3 This is a second-view structural diagram of the bottom of the simple weighing instrument, which is the main feature of this utility model.

[0015] Reference numerals: 1. Hollow glass tube; 2. Rubber head; 11. First part; 12. Second part; 13. Third part; 101. First inclined surface; 102. Second inclined surface. Detailed Implementation

[0016] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0017] like Figure 1 As shown, a simple weighing device provided by this utility model includes: a hollow glass tube 1 and a rubber head 2.

[0018] The rubber nozzle 2 is located at the top of the hollow glass tube 1. Squeezing the rubber nozzle 2 provides airflow into the hollow glass tube 1.

[0019] The hollow glass tube 1 includes an inner glass tube and an outer glass tube. The inner glass tube is divided into a first part 11, a second part 12 and a third part 13 from the bottom end to the top end along the axis. The connection between the first part 11, the second part 12 and the third part 13 is a smooth transition surface.

[0020] From the bottom end along the axial direction to the top end, the inner diameter of the first part 11 gradually increases, the inner diameter of the second part 12 gradually decreases, and the inner diameter of the third part 13 gradually increases.

[0021] like Figure 2 As shown, the bottom end of the hollow glass tube 1 is slanted, a first inclined surface 101 is formed between the outer glass tube and the inner glass tube, and the opening of the inner glass tube is a second inclined surface 102.

[0022] like Figure 3 As shown, the angle between the first inclined surface 101 and the axis of the hollow glass tube 1 is smaller than the angle between the second inclined surface 102 and the axis of the hollow glass tube 1.

[0023] When weighing trace amounts of powder, the powder is taken from the bottom of the hollow glass tube 1. Because the angle between the first inclined surface 101 and the axis of the hollow glass tube 1 is smaller than the angle between the second inclined surface 102 and the axis of the hollow glass tube 1, the smaller angle between the first inclined surface and the axis (i.e., a smaller slope) makes it easier for the powder to enter the opening along the first inclined surface. The hollow glass tube facilitates the taking of trace amounts of powder reagents. The opening of the inner glass tube in the hollow glass tube 1 allows for the taking of trace amounts of powder reagents, preventing the second inclined surface from having an excessively large slope, which could cause the powder to slip off.

[0024] When transferring a small amount of powdered reagent to a reagent bottle after use, press the rubber nozzle 2. The nozzle 2 will provide a small amount of airflow into the inner glass tube, from top to bottom. This airflow helps the powdered reagent leave the weighing vessel, preventing it from adhering and conserving reagent usage.

[0025] Pressing the rubber nozzle 2 provides airflow into the inner glass tube, preventing powdered reagents from adhering to the inside and reducing loss during weighing. Because the inner diameter of the second part 12 of the inner glass tube gradually decreases while the inner diameter of the third part 13 gradually increases, the smaller inner diameter at the connection between the second and third parts 13 increases the airflow pressure, making it easier for the powdered reagents to leave the hollow glass tube 1 and enter the reagent bottle. The wider inner diameter of the first part 11 of the inner glass tube facilitates cleaning of the weighing instrument after use, thus preventing reagent contamination. By designing the bottom end of the hollow glass tube 1 as a bevel, it facilitates the handling of trace amounts of powdered reagents. The bevel design reduces the contact area between the surface of the hollow glass tube 1 and the reagent, minimizing electrostatic adsorption and contact adhesion effects between the weighing reagent and the weighing instrument, thus providing higher accuracy and repeatability for micro and ultramicro weighing. The bevel design is also easier to clean, and point contact reduces the accumulation of contaminants.

[0026] Furthermore, the angle between the first inclined surface of the hollow glass tube and the axis of the hollow glass tube is smaller than the angle between the second inclined surface and the axis of the hollow glass tube. The smaller angle between the first inclined surface and the axis, i.e., the smaller slope, makes it easier for powder to enter the opening along the first type of inclined surface, and the hollow glass tube facilitates the use of trace amounts of powdered reagents.

[0027] The connection between Part 11, Part 22, and Part 33 is a smooth transition surface, which keeps the inner wall of the inner glass tube smooth at all times. When the powder enters the inner glass tube, the airflow carries the powder along the smooth inner wall and away from the simple weighing device. The powder will not remain in the tube, further preventing the powder from sticking to the inner glass tube wall.

[0028] In one feasible implementation, the length ratio of the first part 11, the second part 12, and the third part 13 is 1:1:1.

[0029] In one feasible implementation, the ratio of the inner diameter of the widest part of the first part 11, the inner diameter of the narrowest part of the second part 12, and the inner diameter of the widest part of the third part 13 is 4:1:3. The first part 11 has the widest inner diameter, which facilitates the internal cleaning of the weighing instrument after use, thereby avoiding reagent contamination.

[0030] In one feasible implementation, the angle between the first inclined surface 101 and the axis of the hollow glass tube 1 is 15°, and the angle between the second inclined surface 102 and the axis of the hollow glass tube 1 is 45°.

[0031] In one feasible embodiment, the surface of the hollow glass tube 1 is coated with a silanized dimethyl film, which makes the surface of the hollow glass tube 1 smooth and burr-free, with low friction and low static electricity, effectively preventing the adhesion of powder reagents.

[0032] In one feasible implementation, helium gas is placed between the outer and inner glass layers to reduce sample adsorption caused by static electricity.

[0033] In one feasible implementation, the outer surface of the outer glass is engraved with a capacity scale, allowing the amount of powdered reagent to be visually observed during the removal of the weighing instrument.

[0034] In one feasible implementation, the hollow glass tube 1 is a siliconized glass tube. The siliconized glass material of the siliconized glass tube has high inertness, which can prevent it from reacting with the powdered reagent.

[0035] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0036] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A simple weighing instrument, characterized in that, include: Hollow glass tube (1) and rubber head (2); The rubber nozzle (2) is disposed at the top of the hollow glass tube (1), and the rubber nozzle (2) is used to provide airflow into the hollow glass tube (1); The hollow glass tube (1) includes an inner glass tube and an outer glass tube. The inner glass tube is divided into a first part (11), a second part (12) and a third part (13) from the bottom end along the axial direction to the top end. The connection between the first part (11), the second part (12) and the third part (13) is a smooth transition surface. From the bottom end to the top end along the axial direction, the inner diameter of the first part (11) gradually increases, the inner diameter of the second part (12) gradually decreases, and the inner diameter of the third part (13) gradually increases. The bottom end of the hollow glass tube (1) is a beveled opening, and a first inclined surface (101) is formed between the outer glass tube and the inner glass tube, while the opening of the inner glass tube is a second inclined surface (102). The angle between the first inclined surface (101) and the axis of the hollow glass tube (1) is smaller than the angle between the second inclined surface (102) and the axis of the hollow glass tube (1).

2. The simple weighing instrument as described in claim 1, characterized in that, The length ratio of the first part (11), the second part (12), and the third part (13) is 1:1:

1.

3. The simple weighing instrument as described in claim 1, characterized in that, The ratio of the inner diameter of the widest part of the first part (11), the inner diameter of the narrowest part of the second part (12), and the inner diameter of the widest part of the third part (13) is 4:1:

3.

4. The simple weighing instrument as described in claim 1, characterized in that, The angle between the first inclined surface (101) and the axis of the hollow glass tube (1) is 15°, and the angle between the second inclined surface (102) and the axis of the hollow glass tube (1) is 45°.

5. The simple weighing instrument as described in claim 1, characterized in that, The surface of the hollow glass tube (1) is coated with a silanized dimethyl film.

6. The simple weighing instrument as described in claim 1, characterized in that, Helium gas is placed between the outer glass layer and the inner glass layer.

7. The simple weighing instrument as described in claim 1, characterized in that, The outer surface of the outer glass layer is engraved with a capacity scale.

8. The simple weighing instrument as described in claim 1, characterized in that, The hollow glass tube (1) is an inert glass tube.

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