A weighing funnel for laboratory glass melting

Abstract

This utility model provides a weighing funnel for laboratory glass melting, comprising a weighing section, a transition section, and a funnel section connected in sequence. The weighing section, transition section, and funnel section are integrally formed to form a structure with open ends and a through-hole. The opening of the weighing section is larger than the opening of the funnel section. The funnel section has a hyperbolic structure with equal cross-sectional shrinkage. When pouring solid powder, it is not easy for material to accumulate at the angle of the joint. It does not require knocking, vibration, or shaking to discharge the powder, and it is not easy to cause powder scattering and loss. It can meet the need for positioning and placing strong oxidizing or reducing raw materials.

Description

Technical Field

[0001] This utility model relates to the field of funnels, and in particular to a weighing funnel for laboratory glass melting. Background Technology

[0002] In laboratory glass melting experiments, various raw material powders need to be weighed according to the designed formula and transferred to a platinum crucible, which is then placed in a high-temperature heating furnace for melting. Due to the need for glass composition modification, some small components have a small proportion in the formula and must be weighed precisely to prevent errors in mass proportion from affecting the physicochemical properties of the glass. In addition, because some raw materials have strong oxidizing or reducing properties, if they come into direct contact with the platinum crucible, they may react with the crucible wall at the contact point during heating, causing damage to the crucible. Such substances must be placed within other raw materials to prevent direct contact with the crucible wall.

[0003] In existing technologies, weighing boats or weighing funnels used in laboratory weighing are mostly made of glass, plastic, metal, or paper. Since glass raw materials are often acidic or alkaline, they easily adhere to the aforementioned materials, causing weighing errors. Furthermore, the discharge end of weighing boats or weighing funnels in existing technologies is often tubular or asymmetrical. When pouring solid powders, material tends to accumulate at the angle of the joint, requiring methods such as tapping, vibration, or shaking to discharge it. This easily leads to powder scattering and loss, and also fails to meet the requirement of precisely positioning and storing strongly oxidizing or reducing raw materials. Utility Model Content

[0004] Therefore, there is a need to provide a weighing funnel for laboratory glass melting, which solves the problem that in existing technologies, weighing boats or weighing funnels often have tubular or asymmetrical structures at the end of their discharge section. When pouring solid powder, material tends to accumulate at the angle of the joint, requiring methods such as tapping, vibration, and shaking to discharge it. This can easily cause powder to scatter and be lost, and it also fails to meet the requirement of positioning and placing strong oxidizing or reducing raw materials.

[0005] To achieve the above objectives, this utility model provides a weighing funnel for laboratory glass melting, comprising a weighing section, a transition section, and a funnel section connected in sequence. The weighing section, the transition section, and the funnel section are integrally formed to form a structure with open ends and a through-hole. The opening of the weighing section is larger than the opening of the funnel section, and the funnel section is a hyperbolic structure with an equal cross-sectional shrinkage rate.

[0006] Furthermore, it also includes grippers, which are disposed on one or both sides of the weighing part.

[0007] Furthermore, the weighing part has a cylindrical structure.

[0008] Furthermore, the open end of the weighing section has a shovel-shaped structure.

[0009] Furthermore, the transition section has a spherical structure, and the front end of the transition section is tangent to the end of the funnel section; the end of the transition section is tangent to the front end of the weighing section.

[0010] Furthermore, the cross-section of any part of the weighing section, the transition section, and the funnel section is annular.

[0011] Furthermore, the inner walls of the weighing section, the transition section, and the funnel section are provided with a resin coating.

[0012] Furthermore, the resin coating is made of polyethylene naphthalate, epoxy resin, or acrylic resin.

[0013] Furthermore, it also includes a support portion, which is disposed on the outer wall surface of the weighing part, and the support portion is provided with a support plane.

[0014] Unlike existing technologies, the above technical solution includes a weighing section, a transition section, and a funnel section connected in sequence. The weighing section, the transition section, and the funnel section are integrally formed to create a structure with open ends and a through-hole. The opening of the weighing section is larger than the opening of the funnel section. The funnel section is a hyperbolic structure with equal cross-sectional shrinkage. When pouring solid powder, it is not easy for material to accumulate at the angle of the joint. It does not require knocking, vibration, or shaking to discharge the powder, and it is not easy to cause powder scattering and loss. It can meet the need for positioning and placing strong oxidizing or reducing raw materials. Attached Figure Description

[0015] Figure 1 A three-dimensional view of the structure of a weighing funnel for laboratory glass melting, as described in the specific embodiment;

[0016] Figure 2 A front view of the structure of a weighing funnel for laboratory glass melting as described in the specific embodiment;

[0017] Figure 3 Left view of the structure of a weighing funnel for laboratory glass melting as described in the specific embodiment;

[0018] Figure 4 A rear view of the structure of a weighing funnel for fusion of laboratory glass, as described in the specific embodiment;

[0019] Figure 5 A bottom view of the structure of a weighing funnel for fusion of laboratory glass, as described in the specific embodiment;

[0020] Figure 6 A bottom view of the structure of a laboratory glass melting sample weighing funnel with a support, as described in the specific embodiment.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Funnel-shaped part;

[0023] 3. Weighing section;

[0024] 2. Transition section;

[0025] 4. Scratching the ears;

[0026] 5. Support section. Detailed Implementation

[0027] To explain in detail the technical content, structural features, objectives, and effects of the technical solution, the following description is provided in conjunction with specific embodiments and accompanying drawings.

[0028] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0029] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0030] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0031] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0032] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0033] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0034] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0035] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0036] Please see Figures 1 to 6This embodiment provides a weighing funnel for laboratory glass melting, comprising a weighing section 3, a transition section 2, and a funnel section 1 connected in sequence. The material can be stainless steel, tinplate, or aluminum, and it is integrally formed by hydraulic stretching, without welds, thus being both corrosion-resistant and preventing the adhesion of acidic or alkaline glass raw materials at the joints. Considering lightweight and low adhesion, aluminum is preferred. The weighing section 3, transition section 2, and funnel section 1 are integrally formed, creating a structure with openings at both ends and a through-cavity interior. The opening of the weighing section 3 is larger than the opening of the funnel section 1. For example, the diameter of the opening of the weighing section 3 is set to 60 mm, and the outlet diameter of the funnel section 1 is 8 mm, with a ratio of approximately 7.5:1. This ratio ensures sufficient weighing capacity while making the outlet sufficiently small to ensure that even minute amounts of material can flow smoothly. It should be noted that this ratio is only a reference value and not a specific limitation; it can be adjusted based on actual usage requirements.

[0037] Preferably, the weighing part 3 has a cylindrical structure. The inner wall of the cylinder has no dead corners, allowing the powder to slide naturally under gravity without any residue on the edges. The outer wall of the cylinder easily forms a ring-shaped contact surface with the balance pan, ensuring a centrally located center of gravity and excellent weighing stability. Furthermore, the opening end of the weighing part 3 has a shovel-like structure. The upper end of the cylindrical weighing part 3 forms a shovel-like opening: an arc-shaped notch is cut out within a certain range at the top, making the opening resemble a "shovel." This notch allows a medicine spoon to be easily inserted at a certain angle, allowing the operator to directly see the tip of the spoon and preventing premature spillage of powder; the edges of the notch are polished to avoid scratching fingers.

[0038] The funnel section 1 is a hyperbolic structure with an equal rate of cross-sectional shrinkage. The rate of cross-sectional shrinkage is constant along the axial direction, meaning that the rate of reduction of cross-sectional area is equal at any height. The direct effect of this geometric feature is that the radial constraint force on the powder increases uniformly during its descent, avoiding localized material jamming; at the same time, the airflow velocity rises smoothly along the path, reducing dust back-mixing. Experiments show that the residual amount of glass batch material of the same particle size is smaller in this structure than in traditional tubular funnels. The funnel section 1 has a short-mouth structure with an opening size larger than existing tubular funnels, resulting in smoother material discharge, less clogging, and the ability to stand upright using the funnel section 1 as a support point, thereby achieving the positioning and placement of raw materials.

[0039] Furthermore, it also includes a gripper 4, which is disposed on one or both sides of the weighing part 3. The gripper 4 can be Ω-shaped, U-shaped, or flat, facilitating gripping with tweezers or fingers. Preferably, the base of the gripper 4 forms a rounded transition corner with the outer wall of the weighing part 3 to avoid stress concentration. The first function of the gripper 4 is to act as an additional fulcrum: when the weighing part 3 is placed on the balance pan, the lower edge of the gripper 4 and the bottom edge of the weighing part 3 form a three-point support, ensuring stable standing even when the weighing part 3 is filled with powder, preventing shaking. The second function is reflected in the positioning and feeding scenario: the gripper 4 can be hung on the edge of the crucible, allowing the funnel to be suspended vertically, enabling the operator to freely pour powder with both hands, reducing operator fatigue.

[0040] In some embodiments, the transition section 2 is a spherical structure, with its front end tangent to the end of the funnel section 1; the end of the transition section 2 is tangent to the front end of the weighing section 3. Tangency means that the curvature of the two surfaces is continuous at the connection point, without any abrupt changes in the broken line. After the glass raw material enters the spherical surface of the transition section 2 from the cylinder of the weighing section 3, the streamline transition is smooth, and the velocity vector change is continuous, avoiding stagnation caused by "steps". The spherical transition results in less residual material compared to the traditional conical transition, exhibiting good throughput.

[0041] In some embodiments, the cross-section of any one of the weighing section 3, the transition section 2, and the funnel section 1 is annular. The center lines of these annular sections coincide and are coaxial with the center lines of the openings at both ends. This coaxial annular structure ensures that the powder flows linearly along the axis, without eccentric centrifugal force, resulting in smooth pouring. Simultaneously, the annular cross-section is easily machined in one step on a CNC lathe, achieving high dimensional accuracy and low cost for mass production.

[0042] In some embodiments, the inner walls of the weighing section 3, the transition section 2, and the funnel section 1 are provided with a resin coating. The resin coating is made of polyethylene naphthalate, epoxy resin, or acrylic resin. By spraying a polyethylene naphthalate (PEN) coating onto the inner wall, its low surface energy significantly reduces powder adhesion; it is stable against both acidic and alkaline materials. Epoxy resin or acrylic resin can also be used, which, after curing, forms a dense cross-linked layer with a low coefficient of friction, reducing powder residue.

[0043] In practical use, because the weighing part 3 is cylindrical, it is prone to rolling when placed on the balance scale, resulting in poor stability and affecting the weighing process. Therefore, in some embodiments, a support part 5 is also included. The support part 5 is disposed on the outer wall surface of the weighing part 3 and has a supporting plane. The support part 5 can be a complete protrusion, with one side fixedly connected to the outer wall of the weighing part 3 and the other side being a plane for contacting the surface of the balance scale, providing complete and stable support. The support part 5 can also be a supporting surface formed by multiple protrusions, with a similar supporting principle to the protrusion. It should be noted that when the weighing funnel is placed flat on the balance scale, the center of gravity should fall within the range of the support part 5 to ensure that the support part 5 can stably support the weighing funnel.

[0044] One scenario in the actual use of this invention is as follows: When weighing powder, after cleaning and drying the weighing funnel, place it on the weighing pan of the balance. Use a spatula to feed the powder to be weighed into the weighing part 3 through the opening at the rear end of the weighing part 3 of the weighing funnel. After weighing, use tweezers to hold the handle 4 and move the weighing funnel horizontally above the crucible. Turn the weighing funnel over so that the powder passes through the transition part 2 and the funnel part 1 and enters the crucible.

[0045] In a second practical application scenario, when using this novel material to position and place special raw materials with strong oxidizing or reducing properties, firstly, pour some of the weighed other raw materials into the crucible to form a bottom layer. Use tweezers to hold the gripper 4 so that the funnel part 1 stands vertically on the surface of the powder layer. Then, pour the remaining other raw materials evenly into the crucible from around the weighing funnel. Next, pour the weighed special raw material from the opening of the weighing part 3, through the weighing part 3 and the transition part 2, into the funnel part 1. Finally, lift the weighing funnel to achieve the positioning and placement of the special raw material.

[0046] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection for this utility model. Therefore, any changes and modifications made to the embodiments described herein based on the innovative concept of this utility model, or equivalent structural or procedural transformations made using the content of this utility model's specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included within the scope of protection of this utility model patent.

Claims

1. A weighing hopper for laboratory glass melting samples, characterized by: It includes a weighing section, a transition section and a funnel section connected in sequence. The weighing section, the transition section and the funnel section are integrally formed to form a structure with open ends and a through-hole. The opening of the weighing section is larger than the opening of the funnel section. The funnel section is a hyperbolic structure with equal cross-sectional shrinkage rate.

2. A weighing hopper for laboratory glass melting samples according to claim 1, characterized in that: It also includes grippers, which are disposed on one or both sides of the weighing part.

3. A weighing hopper for laboratory glass melting samples according to claim 1, characterized in that: The weighing section has a cylindrical structure.

4. A weighing hopper for laboratory glass melting samples according to claim 3, characterized in that: The opening end of the weighing section has a shovel-shaped structure.

5. The weighing hopper for laboratory glass melting samples according to claim 1, characterized in that: The transition section has a spherical structure, and the front end of the transition section is tangent to the end of the funnel section; the end of the transition section is tangent to the front end of the weighing section.

6. A weighing hopper for laboratory glass melting samples according to claim 1, characterized in that: The cross-section of any part of the weighing section, the transition section, and the funnel section is circular.

7. A weighing hopper for laboratory glass melting samples according to claim 1, characterized in that: The inner walls of the weighing section, transition section, and funnel section are coated with resin.

8. A weighing hopper for laboratory glass melting samples according to claim 7, characterized in that: The resin coating is made of polyethylene naphthalate, epoxy resin, or acrylic resin.

9. A weighing hopper for laboratory glass melting samples according to claim 1, characterized in that: It also includes a support part, which is disposed on the outer wall surface of the weighing part, and the support part is provided with a support plane.

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