Accurate weighing device for volume of chemical liquid

Abstract

The utility model belongs to the technical field of chemical equipment, and discloses an accurate weighing device for the volume of chemical liquid. An improved chemical small-scale test stirring device comprises a measuring cylinder, a weighing plate, an adjusting stud, an adjusting nut and a bottom plate, and the weighing plate, the adjusting stud and the bottom plate are sequentially connected in the vertical direction. Through cooperation of the adjusting stud and the adjusting nut, the measuring cylinder can be accurately adjusted to a target scale and rapidly locked, it is ensured that the position of the measuring cylinder is stable, and liquid is effectively prevented from overflowing due to shaking when the device moves or topples over.

Description

Technical Field

[0001] This utility model belongs to the field of chemical equipment technology, and in particular to a precise weighing device for the volume of chemical liquids. Background Technology

[0002] In chemical experiments, accurate reagent measurement is a core requirement for ensuring the scientific rigor of the experiment. The quantitative transfer of both solid powders and liquid reagents must adhere to strict standards. Traditional laboratory measuring instruments (such as graduated cups and test tubes) are typically operated using a two-step "coarse estimation-fine adjustment" method due to their pre-defined quantitative container characteristics. This involves initial pouring to control the main volume, followed by drop-by-drop adjustments to achieve the final measurement. While this step-by-step approach may not show significant efficiency differences in single-sample processing, in highly repetitive experimental tasks (especially in group experimental teaching scenarios), the repeated fine-tuning process results in significant time consumption, prolonging the adjustment time and reducing efficiency.

[0003] The prior art CN218566606U discloses a volume-adjustable weighing device suitable for both solid and liquid applications. By using a measuring cup, locking nut, placement plate, and piston column in conjunction, when multiple quantitative measurements of reagent are required, the position of the placement plate within the measuring cup is adjusted, and the measuring cup is then directly filled with reagent for quick and accurate quantitative measurement. However, when using this device, as the liquid level approaches the desired measurement scale, the liquid surface is flush with the top of the measuring cylinder. Therefore, moving the device inevitably causes liquid to slosh and overflow, leading to inaccurate measurement and even inaccurate experimental results. Furthermore, since no manual adjustment is required, liquid overflow during filling results in liquid waste, environmental pollution, and potential safety risks to operators.

[0004] Therefore, there is an urgent need to design a new type of weighing volume device. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a precise volume weighing device.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A precise weighing device for the volume of a chemical liquid, the device comprising a measuring cylinder, a weighing plate, an adjusting stud, an adjusting nut, and a base plate, wherein the weighing plate, the adjusting stud, and the base plate are sequentially connected in a vertical direction;

[0008] The weighing plate is arranged horizontally, and a first groove is coaxially recessed upward on the lower surface of the weighing plate. The base plate is arranged horizontally, and a second groove is coaxially recessed downward on the upper surface of the base plate. Both the inner surfaces of the first and second grooves are provided with connecting threads. The adjusting stud is arranged vertically, and a connecting thread is provided on the outer surface of the adjusting stud. The connecting threads of the first and second grooves are matched with the connecting threads of the adjusting stud. The top end of the adjusting stud can be connected to the weighing plate through the first groove and the connecting thread in a tight coaxial thread engagement. The bottom end of the adjusting stud can be connected to the base plate through the second groove and the connecting thread in a tight coaxial thread engagement.

[0009] The adjusting nut is coaxially threaded and fitted on the adjusting stud between the weighing plate and the base plate. The upper surface of the adjusting nut and the lower surface of the measuring cylinder can be movably and tightly fitted together.

[0010] The measuring cylinder is vertically oriented, open at both the top and bottom, and hollow inside. A cavity is formed within the hollow cylinder, which is vertically oriented. An adjustment hole is coaxially located at the bottom of the measuring cylinder, allowing it to slide coaxially with an adjustment stud. This adjustment hole is positioned below the weighing plate, which is located within the cavity of the measuring cylinder. The inner surface of the cavity is coaxially and tightly fitted with the side surface of the weighing plate, providing a sliding connection. The cavity above the weighing plate can hold the liquid to be weighed, and its inner surface is also coaxially and tightly fitted with the side surface of the weighing plate. The measuring cylinder has graduations that increase evenly from top to bottom, with the 0 graduation line flush with the top surface. The vertical height of the measuring cylinder is less than the vertical height of the adjustment stud.

[0011] A baffle plate is tightly connected to the outer edge of the side of the base plate. The baffle plate protrudes upward in the vertical direction and can block the weighing liquid from overflowing from the measuring cylinder.

[0012] Furthermore, the measuring cylinder includes a measuring cylinder body, a locking post, and a flow guide. The measuring cylinder body and the flow guide are coaxially connected in the vertical direction. The flow guide is located above the measuring cylinder body. The locking post is arranged in the vertical direction and is located on the upper surface of the measuring cylinder body. The locking post can detachably and tightly connect the measuring cylinder body and the flow guide into a whole.

[0013] Furthermore, the measuring cylinder is made of a transparent material.

[0014] Furthermore, the height of the base plate is set to gradually decrease from one horizontal side to the other horizontal side.

[0015] Furthermore, the bottom plate on the lower horizontal side is provided with a liquid outlet.

[0016] The advantages and positive effects of this utility model are as follows:

[0017] 1. This utility model, through the cooperation of the adjusting stud and adjusting nut, allows for precise adjustment of the measuring cylinder to the target scale and quick locking, ensuring the cylinder's stable position and effectively preventing liquid spillage due to movement or tilting of the device. The weighing plate fits tightly against the inner wall of the measuring cylinder, and the rigid connection of the vertical adjusting stud reduces liquid adhesion to the inner wall of the cylinder, ensuring the accuracy of each weighing and reducing system errors. The evenly distributed graduation lines increasing from top to bottom (the 0 mark is flush with the top edge of the measuring cylinder) make the liquid level reading intuitive and accurate, improving operational convenience.

[0018] 2. The base plate features an inclined design with a liquid outlet, combined with a side baffle, which automatically guides overflowing liquid / particles to the lower side for centralized collection. This improves reagent utilization and avoids contaminating the experimental environment, making it particularly suitable for highly reproducible experiments. The measuring cylinder body and the guide tube are quickly disassembled and reassembled via a locking column, facilitating thorough cleaning of any residue adhering to the walls, ensuring measurement accuracy for multiple uses, and reducing the risk of cross-contamination.

[0019] 3. The measuring cylinder is made of transparent material and has evenly distributed graduation lines that increase from top to bottom (the 0 graduation line is flush with the top edge of the measuring cylinder), making the liquid level reading intuitive and accurate, and improving the ease of operation. Attached Figure Description

[0020] Figure 1 This is a front-view perspective three-dimensional schematic diagram of a structural connection according to this utility model;

[0021] Figure 2 This is an exploded three-dimensional schematic diagram of a structural connection according to the present invention;

[0022] Figure 3 for Figure 2 A three-dimensional diagram of a structural connection of a weighing plate (viewed from below).

[0023] Figure 4 for Figure 1 A front-view perspective three-dimensional schematic diagram of a structural connection for the midsole plate;

[0024] Figure 5 for Figure 1 An exploded view of a structural connection of a measuring cylinder.

[0025] Figure 6 for Figure 5 A cross-sectional view of the structural connection of the measuring cylinder body along the AA direction. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to specific embodiments. The following embodiments are only descriptive and not limiting, and should not be used to limit the protection scope of the present invention.

[0027] Unless otherwise specified, the raw materials used in this invention are all commercially available products. Unless otherwise specified, the methods used in this invention are conventional methods in the field. The quantities of all substances used in this invention are conventional usage quantities. Structures and connections not described in detail in this invention can be understood as conventional technical means in the field.

[0028] A precise weighing device for the volume of a chemical liquid, such as Figures 1 to 4 As shown, the device includes a measuring cylinder 1, a weighing plate 2, an adjusting stud 3, an adjusting nut 4, and a base plate 5. The weighing plate, the adjusting stud, and the base plate are connected in sequence along the vertical direction.

[0029] The weighing plate is arranged horizontally, and a first groove 2-1 is coaxially recessed upward on the lower surface of the weighing plate. The base plate is arranged horizontally, and a second groove 5-1 is coaxially recessed downward on the upper surface of the base plate. Connecting threads (not shown in the figure) are provided on the inner surfaces of the first and second grooves. The adjusting stud is arranged vertically, and a connecting thread (not shown in the figure) is provided on the outer surface of the adjusting stud. The connecting threads of the first and second grooves are matched with the connecting threads of the adjusting stud. The top end of the adjusting stud can be connected to the weighing plate through the first groove and the connecting thread in a tight coaxial threaded engagement. The bottom end of the adjusting stud can be connected to the base plate through the second groove and the connecting thread in a tight coaxial threaded engagement. The threaded connection method makes installation and disassembly more convenient, the structural connection more stable, and also facilitates the replacement of damaged parts.

[0030] The adjusting nut is coaxially threaded and fitted onto the adjusting stud between the weighing plate and the base plate. The upper surface of the adjusting nut and the lower surface of the measuring cylinder can be movably and tightly fitted, so that the adjusting nut can fix the position of the measuring cylinder and prevent it from sliding down in the vertical direction, thus ensuring the accuracy of the measurement. At the same time, the adjustment is convenient and accurate. Through the cooperation of the adjusting stud and the adjusting nut, the measuring cylinder can be precisely adjusted to the target scale and quickly locked to ensure the stability of the measuring cylinder and effectively prevent liquid from spilling due to shaking when the device is moved or tilted.

[0031] like Figure 5 and Figure 6As shown, the measuring cylinder is vertically oriented, open at both the top and bottom, and hollow inside. A cavity 1-1 is formed within the hollow portion of the measuring cylinder. An adjustment hole 1-2 is coaxially positioned at the bottom of the measuring cylinder, allowing it to slide coaxially with an adjustment stud. This adjustment hole is located below the weighing plate, which is situated within the cavity of the measuring cylinder. The inner surface of the cavity is coaxially and tightly fitted with the side surface of the weighing plate, providing a sliding connection. The cavity above the weighing plate can hold the liquid to be weighed. The inner surface of the cavity is also coaxially and tightly fitted with the side surface of the weighing plate, preventing the weighing plate from... The liquid to be weighed in the cavity of the upper measuring cylinder flows into the cavity of the measuring cylinder below the weighing plate, causing inaccurate weighing. The measuring cylinder is equipped with graduations, which are evenly spaced and increase from top to bottom. The 0 mark of the measuring cylinder is flush with the upper surface of the measuring cylinder. The vertical height of the measuring cylinder is less than the vertical height of the adjusting stud to prevent the 0 mark from not being flush with the weighing plate, which would prevent weighing from being possible. The cavity inside the measuring cylinder provides storage space for liquids / particles. The evenly spaced graduations (0 mark flush with the upper edge of the cylinder) make the liquid level reading intuitive and accurate, improving the convenience of operation and enabling precise weighing.

[0032] A baffle plate 5-3 is tightly connected to the outer edge of the side of the base plate. The baffle plate protrudes upward in the vertical direction and can block the weighing liquid overflowing from the measuring cylinder, preventing it from overflowing out of the device and polluting the environment. The base plate allows the device to be placed stably on the experimental table platform, making it convenient for experimental personnel to place. The baffle plate can prevent liquid from flowing out of the device, save experimental costs, further facilitate the work of experimental personnel, improve work efficiency, and reduce experimental costs.

[0033] This invention allows for precise adjustment of the measuring cylinder to the target scale and quick locking via the coordination of the adjusting stud and adjusting nut, ensuring a stable position of the measuring cylinder and effectively preventing liquid spillage due to movement or tilting of the device. The weighing plate slides tightly against the inner wall of the measuring cylinder, and combined with the rigid connection of the vertical adjusting stud, reduces liquid adhesion to the inner wall of the cylinder, ensuring the accuracy of each weighing and reducing system errors. The evenly distributed graduation lines increasing from top to bottom (the 0-gradient line is flush with the top edge of the measuring cylinder) make the liquid level reading intuitive and accurate, improving operational convenience.

[0034] In use, this invention requires selecting a weighing plate and measuring cylinder of appropriate size based on the volume of liquid to be weighed. After assembling the device, align the 0 mark of the measuring cylinder with the weighing plate, ensuring the upper surfaces of the weighing plate and measuring cylinder are flush. Then, tighten the adjusting nut upwards to move the measuring cylinder to the desired volume mark. The adjusting nut will then fix the measuring cylinder in place. Pour in the liquid; when it overflows, the volume of liquid in the measuring cylinder is the desired volume. After the liquid is removed from the device, tighten the adjusting nut downwards to reset the measuring cylinder position, ensuring the upper surfaces of the weighing plate and measuring cylinder are flush. This process can be repeated. Due to the tight sliding connection between the side wall of the weighing plate and the inner wall of the measuring cylinder, any liquid adhering to the inside of the measuring cylinder is also removed. During operation, the liquid overflowing from the measuring cylinder will flow downwards to the base plate and be prevented from flowing out of the device by the baffle plate, thus preventing environmental pollution and harm to the operators, ensuring operational safety.

[0035] In this embodiment, as Figure 5 As shown, the measuring cylinder includes a measuring cylinder body 1-3, a locking post 1-4, and a flow guide tube 1-5. The measuring cylinder body and the flow guide tube are coaxially connected in the vertical direction. The flow guide tube is positioned above the measuring cylinder body. The locking post is positioned vertically on the upper surface of the measuring cylinder body. The locking post can detachably and tightly connect the measuring cylinder body and the flow guide tube into a whole, allowing the top of the measuring cylinder body to be raised. After the measuring cylinder accurately weighs the liquid volume, the flow guide tube is positioned above the top of the measuring cylinder body via the locking post to prevent it from shaking during movement and causing liquid to flow out of the device, further improving operational safety and avoiding environmental pollution.

[0036] In this embodiment, the measuring cylinder is made of a transparent material.

[0037] In this embodiment, the height of the base plate is gradually reduced from one horizontal side to the other, so that the liquid can spontaneously flow from the side with a higher height to the side with a lower height, and the liquid that overflows when the liquid is poured will automatically flow to one side for easy recycling.

[0038] Better, such as Figure 4 As shown, the bottom plate on the lower horizontal side is equipped with a liquid outlet 5-2, which facilitates liquid recovery, avoids waste, and saves production costs.

[0039] Although embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will understand that various substitutions, variations, and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments.

Claims

1. A precise weighing device for the volume of a chemical liquid, characterized in that: The device includes a measuring cylinder, a weighing plate, an adjusting stud, an adjusting nut, and a base plate, which are connected in sequence along the vertical direction. The weighing plate is arranged horizontally, and a first groove is coaxially recessed upward on the lower surface of the weighing plate. The base plate is arranged horizontally, and a second groove is coaxially recessed downward on the upper surface of the base plate. Both the inner surfaces of the first and second grooves are provided with connecting threads. The adjusting stud is arranged vertically, and a connecting thread is provided on the outer surface of the adjusting stud. The connecting threads of the first and second grooves are matched with the connecting threads of the adjusting stud. The top end of the adjusting stud can be connected to the weighing plate through the first groove and the connecting thread in a tight coaxial thread engagement. The bottom end of the adjusting stud can be connected to the base plate through the second groove and the connecting thread in a tight coaxial thread engagement. The adjusting nut is coaxially threaded and fitted on the adjusting stud between the weighing plate and the base plate. The upper surface of the adjusting nut and the lower surface of the measuring cylinder can be movably and tightly fitted together. The measuring cylinder is vertically oriented, open at both the top and bottom, and hollow inside, forming a cavity. An adjustment hole is coaxially located at the bottom of the measuring cylinder, allowing it to slide coaxially with an adjustment stud. This adjustment hole is positioned below the weighing plate, which is located within the cavity of the measuring cylinder. The inner surface of the cavity is coaxially and tightly fitted with the side surface of the weighing plate, providing a sliding connection. The cavity above the weighing plate can hold the liquid to be weighed, and its inner surface is also coaxially and tightly fitted with the side surface of the weighing plate. The measuring cylinder has graduations that increase evenly from top to bottom, with the 0 graduation line flush with the top surface. The vertical height of the measuring cylinder is less than the vertical height of the adjustment stud. A baffle plate is tightly connected to the outer edge of the side of the base plate. The baffle plate protrudes upward in the vertical direction and can block the weighing liquid from overflowing from the measuring cylinder.

2. The apparatus according to claim 1, characterized in that: The measuring cylinder includes a measuring cylinder body, a locking post, and a flow guide. The measuring cylinder body and the flow guide are coaxially connected in the vertical direction. The flow guide is located above the measuring cylinder body. The locking post is located in the vertical direction and is located on the upper surface of the measuring cylinder body. The locking post can detachably and tightly connect the measuring cylinder body and the flow guide into a whole.

3. The apparatus according to claim 2, characterized in that: The measuring cylinder is made of a transparent material.

4. The apparatus according to claim 1, characterized in that: The height of the base plate gradually decreases from one horizontal side to the other.

5. The apparatus according to claim 4, characterized in that: The bottom plate on the lower horizontal side is provided with a liquid outlet.

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