Simple device for weighing reagent mercury in laboratory

Abstract

This utility model provides a simple device for weighing reagent mercury in the laboratory, including a main sealed box for forming a closed operating space. Both sides of the main sealed box have glove operating openings, and operating gloves are sealed and installed on each glove operating opening. The top of the main sealed box has a top opening, and a sealing cover is installed on the top opening via an openable connecting structure. The top of the sealing cover has an air outlet, and the sealing cover is connected to a negative pressure suction device for evacuating and exchanging air from the main sealed box via the air outlet. An anti-rolling weighing platform is detachably installed at the bottom center of the main sealed box via a slot or magnetic attraction.

Description

Technical Field

[0001] This application relates to the field of laboratory equipment technology, specifically a simple device for weighing reagent mercury in the laboratory. Background Technology

[0002] Mercury is a heavy metal reagent widely used in laboratory analysis, materials synthesis, and stoichiometric reactions. It is liquid at room temperature and is highly toxic and volatile. Mercury vapor can enter the human body through the respiratory tract, causing serious harm to the central nervous system, kidneys, and respiratory system. Therefore, the safety requirements for the use of mercury in laboratory operations are extremely high. Especially in the weighing process, mercury is both the basis of quantitative reactions and one of the operations with the highest risk of exposure for laboratory personnel.

[0003] Currently, laboratory weighing of mercury often involves placing open containers (such as small beakers, weighing bottles, and watch glasses) directly onto an electronic balance. While this method is simple in structure, mercury, being liquid with high surface tension, is prone to rolling and splashing during sampling, placement, and transfer. This not only contaminates the lab bench and the balance system, affecting weighing accuracy, but can also lead to mercury residue buildup, increasing the difficulty of cleaning and posing safety hazards in subsequent operations.

[0004] Meanwhile, open weighing methods cannot effectively limit the volatilization of mercury. During weighing and exposure to air, mercury continuously releases toxic vapors, exposing laboratory personnel to a prolonged mercury vapor environment, posing significant occupational health risks. Furthermore, the process of transferring mercury from the weighing container to the reaction vessel after weighing also involves re-exposure, pouring, and transfer, further compounding the risks of spillage and volatilization, making it difficult to meet the safety, environmental protection, and standardized operating procedures required by modern laboratories.

[0005] In summary, how to achieve sealed weighing of mercury reagents while ensuring weighing accuracy, preventing volatilization and diffusion, reducing the risk of spillage, and taking into account structural simplicity and ease of operation has become an urgent technical problem to be solved. Utility Model Content

[0006] To overcome a series of defects in the existing technology, the purpose of this utility model is to provide a simple laboratory device for weighing reagent mercury, which includes a main sealed box 1 for forming a closed operating space. The main sealed box 1 has glove operating openings 2 on both its left and right sides, and operating gloves 4 are sealed and installed on each of the glove operating openings 2. The top of the main sealed box has a top opening, and a sealing cover is installed on the top opening via an openable connection structure. An air outlet 8 is located at the top of the sealing cover, and the sealing cover is connected to a negative pressure suction device for evacuating and exchanging air from the main sealed box 1 via the air outlet 8. An anti-rolling weighing platform 3 is detachably installed at the bottom center of the main sealed box 1 via a slot or magnetic attraction.

[0007] Furthermore, the lower part of the sealing cover is filled with an activated carbon filter element 10 for adsorbing mercury vapor, and the upper part of the sealing cover is provided with a silicone sealing ring 9.

[0008] Furthermore, the negative pressure suction device includes a miniature vacuum pump 5 and a connecting pipe 6, wherein one end of the connecting pipe 6 is connected to the air outlet 8, and the other end is connected to the suction end of the miniature vacuum pump 5.

[0009] Furthermore, an air inlet 7 is provided on one side of the bottom of the main sealing box 1.

[0010] Furthermore, the main sealing box 1 is made of transparent acrylic sheet, and all joints of the main sealing box 1 are sealed with sealant.

[0011] Furthermore, the operating glove 4 is made of mercury-resistant butyl rubber, and its opening is fixedly installed on the glove operating opening 2 by a flange and a sealing ring.

[0012] Furthermore, the anti-rolling weighing platform 3 is made of polytetrafluoroethylene material, and its upper surface has several concentric circular grooves.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1) This utility model is equipped with a sealed weighing chamber to form an independent weighing space. The chamber is equipped with a waste gas adsorption sealing cover and a negative pressure suction device. During the weighing process, mercury vapor is continuously drawn and adsorbed, which can effectively reduce the diffusion concentration of mercury vapor in the laboratory environment, significantly improve the operating environment, and ensure the personal safety of experimental personnel.

[0015] 2) By setting an anti-rolling weighing platform inside the weighing chamber, the liquid mercury is stably supported during weighing and transfer, effectively suppressing the rolling and splashing of mercury caused by surface tension and operational disturbances, reducing contamination of the experimental platform and electronic balance, and improving the reliability of weighing results.

[0016] 3) This utility model is equipped with an operating glove opening, which allows the operator to complete the sampling, weighing and transfer processes in a closed space, avoiding direct contact between the hands and mercury reagents, and fundamentally reducing the safety risks caused by skin absorption or accidental contact.

[0017] 4) This utility model has a compact overall structure and high functional integration. It can be put into use without making significant modifications to the existing laboratory weighing process. The operation method is intuitive and simple, and it is suitable for the mercury reagent weighing needs under different laboratory conditions. It has good promotion and application value. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a simple laboratory apparatus for weighing mercury, as disclosed in this utility model.

[0019] In the diagram: 1. Main sealed box; 2. Glove operating port; 3. Anti-roll weighing platform; 4. Operating gloves; 5. Miniature vacuum pump; 6. Connecting pipe; 7. Air inlet; 8. Air outlet; 9. Silicone sealing ring; 10. Activated carbon filter element. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some embodiments of this utility model, not all embodiments.

[0021] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] The embodiments and directional terms described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0023] In a broad embodiment of this application, a simple apparatus for weighing reagent mercury in the laboratory includes a main sealed box 1 for forming a closed operating space. The main sealed box 1 has glove operating openings 2 on both its left and right sides, and operating gloves 4 are sealed and installed on each of the glove operating openings 2. The top of the main sealed box has a top opening, and a sealing cover is installed on the top opening via an openable connection structure. An air outlet 8 is located at the top of the sealing cover, and the sealing cover is connected via the air outlet 8 to a negative pressure suction device for evacuating and exchanging air from the main sealed box 1. An anti-rolling weighing platform 3 is detachably installed at the bottom center of the main sealed box 1 via a slot or magnetic attraction.

[0024] Furthermore, the lower part of the sealing cover is filled with an activated carbon filter element 10 for adsorbing mercury vapor, and the upper part of the sealing cover is provided with a silicone sealing ring 9.

[0025] Furthermore, the negative pressure suction device includes a miniature vacuum pump 5 and a connecting pipe 6, wherein one end of the connecting pipe 6 is connected to the air outlet 8, and the other end is connected to the suction end of the miniature vacuum pump 5.

[0026] Furthermore, an air inlet 7 is provided on one side of the bottom of the main sealing box 1.

[0027] Furthermore, the main sealing box 1 is made of transparent acrylic sheet, and all joints of the main sealing box 1 are sealed with sealant.

[0028] Furthermore, the operating glove 4 is made of mercury-resistant butyl rubber, and its opening is fixedly installed on the glove operating opening 2 by a flange and a sealing ring.

[0029] Furthermore, the anti-rolling weighing platform 3 is made of polytetrafluoroethylene material, and its upper surface has several concentric circular grooves.

[0030] The preferred embodiments of this application are described below with reference to the accompanying drawings, and the application will be further described in detail.

[0031] like Figure 1 As shown, a simple apparatus for weighing reagent mercury in the laboratory includes:

[0032] A main sealed box 1 that provides a core enclosed space;

[0033] A set of operating gloves for use in confined spaces;

[0034] 3. An anti-rolling weighing platform;

[0035] A sealing cap for adsorbing and filtering mercury vapor. The sealing cap has a two-layer structure. The lower layer is filled with an activated carbon filter element 10 for adsorbing mercury vapor, and the upper layer is provided with a silicone sealing ring 9.

[0036] And a negative pressure extraction device for establishing and maintaining a slightly negative pressure state inside a closed space.

[0037] The main sealed box 1 is a box made of transparent acrylic sheet, with two glove-operating openings 2 on its side. This transparent design allows the operator to clearly observe the entire operation process inside the chamber. All seams of the main sealed box 1 are sealed with sealant to ensure its basic airtightness.

[0038] The operating glove 4 is a flexible glove made of mercury-resistant butyl rubber. Its opening is tightly and non-removably fixed to the glove operating opening 2 by a flange and a sealing ring. After putting the hand into the glove, it is possible to perform fine operations such as weighing and transferring inside the main sealed box 1 under the premise of complete isolation.

[0039] The anti-roll weighing platform 3 is detachably installed at the bottom center of the main sealed box 1 via a slot or magnetic attraction. This weighing platform is made of chemically inert, smooth, and non-adhesive polytetrafluoroethylene (PTFE) material. Its upper surface is machined with several concentric grooves to support and restrict the position of the weighing instruments, preventing liquid mercury from rolling and spilling during the weighing process.

[0040] The negative pressure suction device is the core enhancement for safety in this invention. It includes a miniature vacuum pump 5 installed outside the main sealed box 1, and a connecting pipe 6. An air inlet 7 is opened on the bottom side wall of the main sealed box 1, and an air outlet 8 is opened on the top of the main sealed box 1; the connecting pipe 6 is connected to the sealing cover 9 through the air outlet 8. The suction end of the miniature vacuum pump 5 is connected to the main sealed box 1 through the connecting pipe 6, the air outlet 8, and the sealing cover. When the miniature vacuum pump 5 is activated, it extracts the gas inside the main sealed box 1, forcing clean external air to flow in through the air inlet 7, forming a stable airflow from bottom to top.

[0041] The sealing cover is installed at the top opening of the main sealing box 1 via a hinge or snap-fit ​​mechanism. Its lower layer is filled with a high-performance activated carbon filter element 10 for efficient adsorption of mercury vapor in the airflow; the upper layer is an annular silicone sealing ring 9, which ensures the airtightness of the top opening when the sealing cover is closed. This sealing cover is located at the end of the airflow path; all extracted air must pass through this activated carbon filter element 10 for purification before being discharged, ensuring the safety of the emitted gases.

[0042] The working process of this utility model is as follows:

[0043] Preparation stage: Open the sealing cap, place the mercury reagent to be weighed and the dropper in the main sealed box 1, place the weighing bottle or weighing cup in the concentric groove of the anti-roll weighing platform 3, and then close and lock the sealing cap.

[0044] Start negative pressure: Turn on the micro vacuum pump 5, and by observing the micro differential pressure gauge connected to the pipeline, adjust the airflow valve to establish a stable micro negative pressure in the main sealed box 1.

[0045] Operation: The operator places both hands inside the operating gloves 4 on either side and weighs the reagent mercury inside the transparent main sealed box 1. By maintaining a slight negative pressure inside the main sealed box 1, the gas flow direction under leakage conditions is controlled to be from the outside to the inside.

[0046] Purification and Restoration: After weighing, keep the miniature vacuum pump 5 running for 1-2 minutes to thoroughly remove any remaining mercury vapor from the chamber. Then, turn off the miniature vacuum pump 5 and wait for the pressure inside and outside the chamber to equalize before opening the sealing cover and removing the weighed sample.

[0047] Maintenance: Regularly inspect and replace the activated carbon filter element 10 inside the exhaust gas adsorption sealing cover to ensure the continued effectiveness and safety of the device.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A simple apparatus for weighing reagent mercury in the laboratory, characterized in that, The main sealed box (1) is used to form a closed operating space. The left and right sides of the main sealed box (1) are provided with glove operating ports (2). Operating gloves (4) are sealed and installed on the glove operating ports (2). The top of the main sealed box is provided with a top opening. The top opening is provided with a sealing cover installed through an openable connection structure. The top of the sealing cover is provided with an air outlet (8). The sealing cover is connected to a negative pressure air extraction device for evacuating and exchanging air from the main sealed box (1) through the air outlet (8). The bottom center of the main sealed box (1) is provided with an anti-rolling weighing platform (3) which is detachably provided by means of a slot or magnetic attraction.

2. The simple apparatus for weighing reagent mercury in the laboratory according to claim 1, characterized in that, The lower part of the sealing cap is filled with an activated carbon filter element (10) for adsorbing mercury vapor, and the upper part of the sealing cap is provided with a silicone sealing ring (9).

3. A simple apparatus for weighing reagent mercury in the laboratory according to claim 1, characterized in that, The negative pressure pumping device includes a miniature vacuum pump (5) and a connecting pipe (6), wherein one end of the connecting pipe (6) is connected to the air outlet (8), and the other end is connected to the pumping end of the miniature vacuum pump (5).

4. A simple apparatus for weighing reagent mercury in the laboratory according to claim 3, characterized in that, An air inlet (7) is provided on one side of the bottom of the main sealing box (1).

5. A simple apparatus for weighing reagent mercury in the laboratory according to any one of claims 1-4, characterized in that, The main sealing box (1) is made of transparent acrylic sheet, and all joints of the main sealing box (1) are sealed with sealant.

6. A simple apparatus for weighing reagent mercury in the laboratory according to claim 5, characterized in that, The operating glove (4) is made of mercury-resistant butyl rubber, and its opening is fixedly installed on the glove operating opening (2) by a flange and a sealing ring.

7. A simple apparatus for weighing reagent mercury in the laboratory according to claim 5, characterized in that, The anti-rolling weighing platform (3) is made of polytetrafluoroethylene material, and its upper surface has several concentric grooves.

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