A transfer structure for standard substance weighing

Abstract

The utility model discloses a transfer structure for standard substance weighing belongs to the technical field of biomass fuel processing equipment. The transfer structure includes: the base, is equipped with the accommodating cavity on it, the closed component includes: the closing plate, has a plurality of, is arranged on the base respectively, the closed area, the closed space that is formed by the closing of each closing plate and base, the accommodating cavity is in the closed area, at least one closing plate can be moved to the base to open or close the closed area. The utility model accommodating cavity on the base is used for placing the volumetric flask, and the closing plate arranged on the base can be combined with the base to form a relatively closed space, so that the volumetric flask of standard substance is not knocked down when batch weighing, and the waste of standard substance and the pollution of volumetric flask are avoided. Moreover, the closed space can also avoid the volatile standard substance to spread to the outside space and pollute the environment.

Description

Technical Field

[0001] This invention belongs to the field of chemical analysis technology, specifically relating to a transfer structure for weighing standard substances. Background Technology

[0002] In the field of chemical analysis, the preparation of standard solutions is a crucial step. They are widely used in instrument calibration, analytical method validation, or directly as reference solutions, playing a vital role in ensuring the accuracy and reliability of analytical results.

[0003] The preparation of standard solutions in batches, especially when dealing with highly toxic powdered substances or highly volatile standard substances, involves more complex procedures. First, the standard substance is weighed inside a balance hood. Then, it is transferred to a volumetric flask on the balance table, followed by dissolution and volume adjustment in a fume hood. Several potential risks exist in this process: First, during the batch weighing stage, highly toxic powdered substances or highly volatile standard substances may be accidentally spilled, wasting expensive standard substances and contaminating the experimental environment. Second, during the transfer to the fume hood, the volatile substances increase the risk of inhalation for operators, posing a threat to their health.

[0004] Chinese patent document CN203961342U discloses a weighing chamber comprising a first chamber, a second chamber, and a third chamber. The first chamber is located at the top of the second and third chambers, and the three chambers are arranged in a triangular shape. The second chamber is the working area of ​​the weighing chamber. The air in the second chamber undergoes three stages of filtration: pre-filter, medium-filter, and high-efficiency filter, making the air returning to the second chamber cleaner and thus improving the cleanliness of the working area. Simultaneously, the airflow direction in the second chamber is from top to bottom, preventing dust from rising and inhaling the dust. Furthermore, the door opening on the side wall of the second chamber is covered by a curtain, facilitating user access to the second chamber. Finally, the louvers open downwards, causing the clean air blown out by the louvers to form an air curtain in front of the curtain, thus isolating the internal and external air of the second chamber and effectively preventing cross-contamination between the working area and the outside.

[0005] However, the weighing chamber of the aforementioned patented technology is a building equipped with filters, fans, fluorescent lights, curtains, and other components, and is not suitable for transferring volumetric flasks containing weighed standard substances. Utility Model Content

[0006] This invention provides a transfer structure for weighing standard substances, which solves the above-mentioned technical problems.

[0007] To solve the above technical problems, the present invention adopts the following technical solution: A transfer structure for weighing standard substances includes: a base with a receiving cavity thereon; a sealing assembly including: several sealing plates, each disposed on the base; a sealing area, a sealed space formed by the sealing plates and the base; the receiving cavity is located within the sealing area; at least one of the sealing plates is movable relative to the base to open or close the sealing area.

[0008] Furthermore, the sealing plate includes: a fixed sealing plate disposed on both sides of the base; and a movable sealing plate connected to the fixed sealing plate and movable relative to the base.

[0009] Furthermore, the movable sealing plate is positioned above the base; one side of the movable sealing plate is hinged to the fixed sealing plate; the opposite side of the movable sealing plate is locked to the fixed sealing plate.

[0010] Furthermore, the height of the receiving cavity is 0.2-0.3 times the height of the volumetric flask in which it is placed.

[0011] Furthermore, the transfer structure also includes: a fixing component, comprising: a fixing rod with both ends respectively disposed on the fixing sealing plate on both sides; a fixing ring disposed on the fixing rod; and a notch disposed on the fixing ring; the fixing ring is located above the receiving cavity and is coaxial in center, and the number of both is the same.

[0012] Furthermore, the length of the notch is 0.2-0.4 times the arc length of the fixing ring; the fixing ring 32 is made of an elastic material.

[0013] Furthermore, the fixing member is located above the receiving cavity and at a position 0.3-0.7 times the height of the fixed sealing plate.

[0014] Furthermore, an annular movable block is inserted into the receiving cavity to adjust the diameter of the receiving cavity as needed.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The receiving cavity on the base is used to place volumetric flasks, and the sealing plate set on the base can form a relatively closed space with the base, which avoids knocking over the volumetric flasks with transferred standard substances during batch weighing, thus avoiding waste of standard substances and contamination of volumetric flasks; moreover, the closed space can also prevent volatile standard substances from spreading into the external space and polluting the environment; this application also has the feature of being easy to use.

[0016] 2. The sealing plate includes a fixed sealing plate and a movable sealing plate. The movable sealing plate is hinged to the fixed sealing plate, and the sealing area can be opened or closed when needed to meet the transfer and use requirements of the standard material after weighing. The opposite side of the movable sealing plate on the hinged side can be locked with the fixed sealing plate, which can achieve a better sealing effect and prevent volatile standard materials from volatilizing and diffusing into the external space and causing pollution.

[0017] 3. The fixing component is used to fix the neck of the volumetric flask. When in use, first place the body of the volumetric flask in the receiving cavity, and push the neck into the fixing ring from the notch to fix the neck of the volumetric flask. The receiving cavity is used to fix the body of the flask, and the fixing component is used to fix the neck. The combination of the two can play a good role in fixing the flask and prevent the volumetric flask from being knocked over during operation, which would cause the standard substance to spill out and contaminate the volumetric flask.

[0018] 4. The movable block is used to adjust the diameter of the receiving cavity to meet the placement requirements of bottles with different diameters, thereby improving the applicability of the transfer structure. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is the front view of the present invention.

[0022] Figure 3 This is the left view of the present invention.

[0023] Figure 4 This is a top view of the present invention (with part of the fixed and closed plate removed).

[0024] Figure 5 This is a schematic diagram of the structure of a fixed component.

[0025] Reference numerals: 1-base, 11-receiving cavity, 12-moving block, 2-sealing component, 21-sealing plate, 211-fixed sealing plate, 212-movable sealing plate, 22-sealing area, 3-fixing component, 31-fixing rod, 32-fixing ring, 33-notch. Detailed Implementation

[0026] To facilitate a better understanding of this utility model, the following examples are provided in conjunction with the accompanying drawings. These examples fall within the protection scope of this utility model, but do not limit the protection scope of this utility model.

[0027] Example 1 A transfer structure for weighing a standard substance, such as Figures 1-4 As shown, it includes: a base 1 with a receiving cavity 11 thereon; a sealing assembly 2 including: a sealing plate 21, of which there are several pieces, respectively disposed on the base 1; a sealing area 22, a sealed space formed by the sealing plates 21 and the base 1; the receiving cavity 11 is located within the sealing area 22; at least one sealing plate 21 can move relative to the base 1 to open or close the sealing area 22.

[0028] The container is round, which makes it easy to place the volumetric flask and avoid accidentally knocking it over, which would cause the standard substance to spill and be wasted, as well as contaminating other volumetric flasks. The shape of the container can fit the body of the volumetric flask, and a soft material can be wrapped around the side of the container to prevent scratching the body of the volumetric flask.

[0029] The base has certain length, width, and height dimensions, and can be equipped with spaced cavities in its length and width directions to meet the needs of placing multiple volumetric flasks when preparing batches of standard substance solutions; each cavity can be set with different diameter specifications as needed to facilitate the placement of volumetric flasks of different sizes; the spacing between adjacent volumetric flasks is appropriate to meet the reasonable space required by the experimental personnel; handles can be installed on both sides of the base as needed to facilitate the operation of the personnel to firmly grip the base plate when moving the flasks.

[0030] The sealing plate is mounted on the base, forming a closed space with the base. This ensures that the weighed standard substance is in a closed area after being transferred to the volumetric flask and before being transferred to the fume hood for dilution and volume determination. This prevents toxic and volatile standard substances from escaping into the external space and causing environmental pollution, and reduces the risk to personnel. One part of the sealing plate can be moved relative to the base, making it easy to open or close the closed area to meet usage needs.

[0031] Instructions for use: Select the appropriate number of volumetric flasks according to the required standard solution series and place them in the receiving chamber; calculate the content of the standard substance to be weighed for each concentration according to the standard series; after completion, open the sealing plate and transfer the weighed standard substances to the corresponding volumetric flasks in sequence; close the sealing plate after completion; pick up the base and transfer it to the fume hood, turn on the fume hood, open the sealing plate, add the prepared solvent to each volumetric flask and make up to volume, stopper the flask, remove the volumetric flask and shake well.

[0032] Example 2 This utility model also has the following technical features: like Figures 1-3As shown, the sealing plate 21 includes: a fixed sealing plate 211, which is disposed on both sides of the base 1; and a movable sealing plate 212, which is connected to the fixed sealing plate 211 and can move relative to the base 1.

[0033] like Figures 1-3 As shown, the movable sealing plate 212 is positioned above the base 1; one side of the movable sealing plate 212 is hinged to the fixed sealing plate 211; the opposite side of the movable sealing plate 212 is locked to the fixed sealing plate 211.

[0034] like Figures 1-3 As shown, the height of the receiving cavity 11 is 0.2-0.3 times the height of the volumetric flask placed thereon.

[0035] The movable closure is used to open or close the enclosed area, facilitating the insertion and removal of volumetric flasks. The movable closure is hinged to the fixed closure, making it easy to open and close. When the movable closure is open, the angle of rotation should be greater than 90° to prevent it from suddenly closing due to accidental contact, which could disrupt operations. The movable closure can be L-shaped, covering the top and part of the front, allowing for easy insertion and removal of volumetric flasks after opening.

[0036] Because the volumetric flask has a certain height, the receiving cavity also has a certain height to ensure that the flask is placed stably and to hold the flask in place.

[0037] An existing sealing strip can be installed at the junction of the fixed and movable sealing plates. The sealing strip is installed and fixed in the existing manner so that the gap between the two plates has good sealing performance when the movable sealing plate is closed.

[0038] Example 3 This utility model also has the following technical features: like Figure 1 , Figures 4-5 As shown, the transfer structure also includes: a fixing component 3, comprising: a fixing rod 31, with both ends respectively disposed on the fixing and sealing plates 211 on both sides; a fixing ring 32 disposed on the fixing rod 31; and a notch 33 disposed on the fixing ring 32; the fixing ring 32 is located above the receiving cavity 11 and is coaxial in center, and the number of both is the same.

[0039] like Figure 1 , Figures 4-5 As shown, the length of the notch 33 is 0.2-0.4 times the arc length of the fixing ring 32; the fixing ring 32 is made of elastic material.

[0040] like Figure 1 , Figures 4-5 As shown, the fixing member 31 is located above the receiving cavity 11 and at a position 0.3-0.7 times the height of the fixing sealing plate 211.

[0041] Volumetric flasks have a certain height and are characterized by a large body and a long, narrow neck. To prevent the flask from tipping over due to contact with the neck during operation, a fixing assembly is needed to secure the neck. The fixing rod is fixed at both ends to the fixing and sealing plates on both sides, and the fixing ring is fixed to the fixing rod. The notch on the fixing ring allows the neck of the volumetric flask to be pushed into the fixing ring from this point, thus securing it and fixing the neck of the volumetric flask. Since the fixing rings are used to fix the neck of the volumetric flask, their number is consistent with the number of the receiving cavity, and the centers of both are coaxial, ensuring that the volumetric flask is placed flat and stable.

[0042] The length of the notch is limited to facilitate inserting the neck of the volumetric flask into the retaining ring, and the length of the notch cannot be too large as the outer diameter of the neck to avoid the neck not being securely fixed; the retaining ring can be made of a material with a certain degree of elasticity, such as silicone, and the ring diameter of the retaining ring can match the outer diameter of the neck of the volumetric flask placed in the corresponding receiving cavity.

[0043] Since the neck lengths of volumetric flasks of different specifications vary, the height of the fixing components above the receiving cavity must be appropriate. The fixing components are set along the length of the base, and multiple sets of receiving cavities can be set at intervals along the width of the base. The fixing components of the receiving cavities in the same set along the length are set at the same height, and the height of the fixing components of different sets of receiving cavities can be selected according to actual needs. The fixing rings can also be set in various specifications as needed.

[0044] Example 4 This utility model also has the following technical features: like Figure 1 , Figure 4 As shown, an annular movable block 12 is inserted into the receiving cavity 11 to adjust the diameter of the receiving cavity 11 as needed.

[0045] The movable block has a ring-shaped structure, and its inner diameter area can be used to place the body of the volumetric flask. By setting movable blocks with different inner diameters, the placement needs of volumetric flasks of different specifications can be met. The side of the movable block is provided with protrusions or grooves, and the side of the receiving cavity is provided with matching protrusions or grooves so that the movable block can be inserted into the receiving cavity, thereby adjusting the diameter of the receiving cavity. The side of the movable block that contacts the volumetric flask can be wrapped with soft material to avoid scratching the flask body.

[0046] Since different sizes of volumetric flasks, such as 25mL, 50mL, and 100mL, may be used when preparing standard solutions, and the body size of volumetric flasks varies, a ring-shaped movable block is placed inside the receiving cavity to adjust the diameter of the receiving cavity and meet the placement requirements of volumetric flasks of different diameters in order to enhance applicability and meet the placement requirements of volumetric flasks of different sizes.

[0047] Commonly used volumetric flasks come in different sizes such as 5mL, 10mL, 20mL, 25mL, 50mL, and 100mL. The body and neck of the flasks vary considerably between different sizes. Therefore, by setting up different sets of receiving chambers and using movable blocks, it is sufficient to meet the needs of 2-3 adjacent volumetric flask sizes. For example, 5mL and 10mL can be used as one set with movable blocks and the same set of receiving chambers can be used together. Similarly, 20mL and 25mL can be used as one set with movable blocks and the same set of receiving chambers can be used together. This avoids the inconvenience caused by setting too many sizes of movable blocks.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0049] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A transfer structure for weighing standard substances, characterized in that, include: A base (1) has a receiving cavity (11) on it; Enclosed component (2), including: The enclosed plate (21) consists of several pieces, which are respectively disposed on the base (1); Enclosed area (22), a sealed space formed by the enclosure of each of the enclosure plates (21) and the base (1); The receiving cavity (11) is located within the enclosed area (22); At least one of the enclosure plates (21) is movable relative to the base (1) to open or close the enclosure area (22).

2. The transfer structure for weighing standard substances according to claim 1, characterized in that, The enclosure plate (21) includes: Fixed sealing plates (211) are provided on both sides of the base (1); The movable sealing plate (212) is connected to the fixed sealing plate (211) and can move relative to the base (1).

3. The transfer structure for weighing standard substances according to claim 2, characterized in that, The movable sealing plate (212) is positioned above the base (1); The movable sealing plate (212) is hinged to the fixed sealing plate (211) on one side; The opposite side of the movable sealing plate (212) is hinged to the fixed sealing plate (211) and locked.

4. The transfer structure for weighing standard substances according to claim 3, characterized in that, The height of the receiving cavity (11) is 0.2-0.3 times the height of the volumetric bottle placed thereon.

5. A transfer structure for weighing standard substances according to any one of claims 1-4, characterized in that, Also includes: Fixed component (3), including: The fixing rod (31) is provided at both ends on the fixing and closing plates (211) on both sides; A fixing ring (32) is provided on the fixing rod (31); A notch (33) is provided on the fixing ring (32); The fixing ring (32) is located above the receiving cavity (11) and is coaxial in center, and the number of both is the same.

6. The transfer structure for weighing standard substances according to claim 5, characterized in that, The length of the notch (33) is 0.2-0.4 times the arc length of the fixing ring (32); The retaining ring (32) is made of an elastic material.

7. The transfer structure for weighing standard substances according to claim 6, characterized in that, The fixing member (31) is located above the receiving cavity (11) and at a position 0.3-0.7 times the height of the fixing sealing plate (211).

8. A transfer structure for weighing standard substances according to any one of claims 1-7, characterized in that, An annular movable block (12) is inserted into the receiving cavity (11) to adjust the diameter of the receiving cavity (11) as needed.

Images