Laboratory acid jar

Abstract

The application relates to the field of laboratory instruments, and provides a laboratory acid cylinder. The laboratory acid cylinder comprises an outer cylinder, an inner cylinder and a cylinder cover, the cylinder cover is buckled at the upper opening of the outer cylinder to form a closed cavity, the inner cylinder is placed in the closed cavity, a first communication hole is arranged in the bottom wall of the inner cylinder, a strip-shaped second communication hole is arranged in the side wall of the inner cylinder, the second communication hole extends along the height direction of the inner cylinder, and an acidic solution in the outer cylinder enters the inner cylinder through the first communication hole and the second communication hole. The laboratory acid cylinder provided by the application can effectively solve the problem of low cleaning efficiency of the laboratory acid cylinder in the prior art and improve the convenience of using the acid cylinder.

Description

Technical Field

[0001] This application relates to the field of laboratory instruments, and more particularly to a laboratory acid tank. Background Technology

[0002] In the process of immersing and cleaning laboratory glassware, acid tanks are commonly used devices, consisting of an outer tank, an inner tank, and a lid. They are mainly used to hold acidic solutions such as sulfuric acid, a mixture of potassium dichromate and sulfuric acid, nitric acid, and hydrochloric acid. However, existing acid tanks have significant drawbacks: First, the holes at the bottom of the inner tank are designed to allow the acidic solution from the outer tank to enter, but the solution enters slowly, resulting in low efficiency in the glassware immersion pretreatment and prolonging the experimental preparation cycle. Second, if a simple method is used to speed up the acid entry, such as forcefully pressing down on the inner tank, the acid will spray out at the holes. Once the highly concentrated, corrosive, and oxidizing acid is sprayed out, it may not only corrode surrounding equipment but also easily cause severe chemical burns to the operators. Utility Model Content

[0003] This application provides a laboratory acid tank to solve the problem of low cleaning efficiency of existing laboratory acid tanks and improve the ease of use of the acid tank.

[0004] A laboratory acid tank according to a first aspect of this application includes an outer tank, an inner tank, and a tank cover. The tank cover is fastened to the upper opening of the outer tank to form a closed cavity. The inner tank is placed in the closed cavity. The bottom wall of the inner tank is provided with a first connecting hole, and the side wall of the inner tank is provided with a strip-shaped second connecting hole. The second connecting hole extends along the height of the inner tank. The acidic solution in the outer tank enters the inner tank through the first connecting hole and the second connecting hole.

[0005] According to one embodiment of this application, the laboratory acid tank further includes a shelf disposed inside the inner tank, the shelf dividing the internal cavity of the inner tank in a horizontal direction;

[0006] The edge of the shelf is provided with a first locking protrusion, and the inner wall of the inner cylinder is provided with a first locking groove extending along the height direction. The first locking protrusion extends into the first locking groove so that the shelf can move up and down in the inner cylinder and be fixed in a preset position.

[0007] According to one embodiment of this application, the layer plate is provided with liquid guiding holes.

[0008] According to one embodiment of this application, the laboratory acid tank further includes a vertical insert plate disposed inside the inner tank, the vertical insert plate dividing the cavity between adjacent layers in a vertical direction, and / or, the vertical insert plate dividing the cavity between the layers and the bottom wall of the inner tank in a vertical direction;

[0009] The edge of the vertical insert plate is provided with a second latching protrusion, and part of the second latching protrusion of the vertical insert plate is inserted into the first latching slot.

[0010] According to one embodiment of this application, the vertical insert plate is further provided with a second slot, which is configured to engage with a second protrusion of a portion of the vertical insert plate.

[0011] According to one embodiment of this application, the vertical insert plate is provided with a strip-shaped liquid passage hole, which extends along the direction of the height of the inner cylinder.

[0012] According to one embodiment of this application, the laboratory acid tank further includes an ultrasonic stirring device, which includes a connected ultrasonic generator and an ultrasonic transducer. The ultrasonic transducer is disposed at the bottom of the outer tank, and the ultrasonic transducer agitates the acidic solution in the outer tank.

[0013] According to one embodiment of this application, the ultrasonic transducers are arranged in an equilateral triangular array at the bottom of the outer cylinder.

[0014] According to one embodiment of this application, the laboratory acid tank further includes an absorption box disposed at the bottom of the tank cover, wherein a gas absorbent is disposed in the absorption box, and the gas absorbent is configured to absorb acidic gases in the closed cavity.

[0015] According to one embodiment of this application, the laboratory acid tank further includes a discharge pipe assembly communicating with the outer tank. The discharge pipe assembly includes an outer pipe and an inner pipe, with the outer pipe sleeved outside the inner pipe. A heating wire is provided on the outer surface of the outer pipe, and a heating medium is filled between the outer pipe and the inner pipe.

[0016] The above-described one or more technical solutions in the embodiments of this application have at least one of the following technical effects:

[0017] The laboratory acid tank of this application, by providing a second connecting hole extending along the height direction on the side wall of the inner tank, can effectively increase the speed at which the acidic solution enters the inner tank. Furthermore, when the acidic solution enters the inner tank from the side wall, even in situations with a relatively high speed (such as when the inner tank is pressed down forcefully), the acidic solution at the second connecting hole on the side wall of the inner tank will not spray upwards. Moreover, the acidic solution at the second connecting hole enters the inner tank at a downward angle, which has a certain counteracting effect with the acidic solution entering through the first connecting hole on the bottom wall of the inner tank, thereby preventing the acidic solution at the first connecting hole from spraying out. This not only increases the speed at which the acidic solution enters the inner tank but also effectively improves the safety of cleaning and effectively avoids the splashing of the acidic solution.

[0018] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the outer cylinder provided in this application.

[0021] Figure 2 This is a schematic diagram of the inner cylinder provided in this application. Figure 1 (3D view).

[0022] Figure 3 This is a schematic diagram of the inner cylinder provided in this application. Figure 2 (Top view).

[0023] Figure 4 This is a schematic diagram of the cylinder head provided in this application.

[0024] Figure 5 This is a schematic diagram of the structure of the layer plate provided in this application.

[0025] Figure 6 This is a schematic diagram of the vertical insert provided in this application. Figure 1 (Main view).

[0026] Figure 7 This is a schematic diagram of the vertical insert provided in this application. Figure 2 (Top view).

[0027] Figure label:

[0028] 1. Outer cylinder; 11. Sealing groove; 12. Draining clip protrusion; 13. Handle; 14. Drain pipe buckle; 2. Inner cylinder; 21. First connecting hole; 22. Second connecting hole; 23. First groove; 24. Matching clip protrusion; 25. Through hole handle; 3. Cylinder cover; 31. Handle; 32. Buckle; 4. Shelf; 41. First clip protrusion; 42. Liquid guide hole; 5. Vertical insert plate; 51. Second clip protrusion; 52. Second groove; 53. Liquid passage hole; 6. Ultrasonic stirring device; 7. Absorption box; 8. Drain pipe assembly. Detailed Implementation

[0029] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but should not be used to limit the scope of this application.

[0030] In the description of the embodiments of this application, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "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 the embodiments of 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 the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0032] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0034] Existing acid tanks typically present the following safety hazards: 1. Glassware of varying sizes is often haphazardly stacked within the acid tank, easily leading to breakage and accidents during handling, threatening the safety of laboratory personnel. 2. In most cases, acid cannot enter the glassware on its own; it must be manually pressed into the acid solution. During this process, airflow interference can cause acid splashing, posing a potential danger to laboratory personnel. 3. The acid in the acid tank is usually volatile; opening the tank lid releases a large amount of acid fumes, endangering the health of laboratory personnel. 4. Changing the acid solution usually requires tilting the tank or using a small container to remove the waste liquid one by one, which is not only time-consuming and laborious but also carries a high degree of risk.

[0035] A laboratory acid tank according to an embodiment of the first aspect of this application, such as Figures 1 to 7 As shown, the laboratory acid tank includes an outer tank 1, an inner tank 2, and a tank cover 3. The tank cover 3 is fastened to the upper opening of the outer tank 1 to form a closed cavity. The inner tank 2 is placed in the closed cavity. The bottom wall of the inner tank 2 is provided with a first connecting hole 21, and the side wall of the inner tank 2 is provided with a strip-shaped second connecting hole 22. The second connecting hole 22 extends along the height of the inner tank 2. The acidic solution in the outer tank 1 enters the inner tank 2 through the first connecting hole 21 and the second connecting hole 22.

[0036] The laboratory acid tank provided in this application embodiment constructs a three-dimensional acid flow path by setting a first connecting hole 21 on the bottom wall of the inner tank 2 and a strip-shaped second connecting hole 22 extending along the height direction on the side wall. The acidic solution in the outer tank 1 can achieve basic bottom-up guidance through the bottom first connecting hole 21, while forming multi-level lateral permeation along the strip-shaped second connecting hole 22 on the side wall. Compared with the traditional single bottom opening structure, this significantly increases the effective flow area of ​​acid entering the inner tank 2, greatly improving the acid entry speed and effectively shortening the solution filling time before immersing glassware. The longitudinal extension design of the strip-shaped second connecting hole 22 can form a gradient pressure distribution through the height difference, avoiding the risk of spraying due to excessive local flow velocity. Even if a slight external force is applied to press down on the inner tank 2, the acid will form a controllable laminar flow along the wall of the strip-shaped hole, rather than concentrated spraying. The overall structure, through flow channel optimization and pressure equalization design, improves the acid flow efficiency while avoiding the safety hazards of traditional opening methods at the structural level, achieving a synergistic improvement in efficiency and safety.

[0037] In practical applications, a shielding element can be installed at the first connecting hole 21. This shielding element can be positioned directly above the first connecting hole 21 to further prevent the acidic solution at the first connecting hole 21 from spraying upwards. Alternatively, the path and shape of the first connecting hole 21 can be adjusted; for example, the cylindrical first connecting hole 21 can be changed to a zigzag hole, adjusting the spray direction of the acidic solution at the first connecting hole 21 (spraying towards the side wall of the inner cylinder 2 instead of upwards) to improve the safety of the acid cylinder.

[0038] The first connecting hole 21 can be a circular hole with a diameter of 0.5 to 1 cm. The width of the second connecting hole 22 can be 0.5 to 1 cm, and the length can be 10 to 15 cm. The bottom of the second connecting hole 22 is 2 to 3 cm away from the bottom of the inner cylinder 2, and the top of the second connecting hole 22 is 2 to 3 cm away from the top of the inner cylinder 2.

[0039] According to one embodiment of this application, such as Figure 5 As shown, the laboratory acid cylinder also includes a shelf 4 disposed inside the inner cylinder 2. The shelf 4 divides the internal cavity of the inner cylinder 2 in the horizontal direction. A first locking protrusion 41 is provided on the edge of the shelf 4, and a first locking groove 23 extending in the height direction is provided on the inner wall of the inner cylinder 2. The first locking protrusion 41 extends into the first locking groove 23 so that the shelf 4 can move up and down in the inner cylinder 2 and be fixed in a preset position.

[0040] The addition of an adjustable shelf 4, which horizontally divides the inner cylinder 2 cavity and features a sliding design with the first latch 41 and the first slot 23, significantly enhances the flexibility and practicality of the acid tank. The horizontal division of the shelf 4 allows for layered utilization of the inner cylinder 2 space, enabling glassware of different heights and sizes (such as beakers, test tubes, and petri dishes) to be immersed in the same acid tank in separate areas. This avoids uneven acid contact caused by taller glassware obstructing shorter glassware, effectively increasing the immersion area for various glassware and improving the utilization rate of the acid tank. The shelf 4, through the sliding engagement of the first latch 41 with the first slot 23 on the inner wall of the inner cylinder 2, can be precisely adjusted to a fixed position according to the height of the glassware, meeting the personalized immersion depth requirements of different experiments. The embedded connection structure of the latch and slot ensures the stability of the shelf 4 while supporting quick disassembly and installation, facilitating cleaning of the shelf 4 before and after experiments, and meeting the requirements for easy maintenance of laboratory equipment. Furthermore, the horizontal arrangement of the shelf 4 guides the acid solution to form horizontal convection at different heights within the inner tank 2. Combined with the longitudinal flow guidance through the second connecting hole 22 on the side wall, this creates a three-dimensional flow field of "vertical penetration + horizontal diffusion," effectively reducing the contact time between the acid solution and the vessel surface by 20%, further improving contaminant removal efficiency. The shelf 4 design improves upon the traditional single-immersion mode of acid tanks from both space utilization and flow field optimization perspectives, effectively solving the problem of uneven treatment when multiple vessels of different sizes are bathed together, combining flexibility and high efficiency.

[0041] Shelf 4 can be fixed in height by abutting against the glassware below, that is, no special fixing point needs to be set on the inner wall, and shelf 4 is pressed on the glassware. Of course, fixing points can also be set on the inner wall of the inner cylinder 2 according to actual needs to fix shelf 4 at a preset height.

[0042] The settings of the protrusion and the slot can be interchanged; that is, the first slot can be set on the edge of the shelf and the first protrusion can be set on the inner wall of the inner cylinder. This application does not limit this.

[0043] According to one embodiment of this application, such as Figure 4 As shown, liquid guiding holes 42 are provided on the layer plate 4.

[0044] The liquid guiding holes 42 on the shelf 4 allow acid flow between the layered chambers of the inner cylinder 2, ensuring that both upper and lower glassware are in contact with fresh acid. This avoids uneven cleaning during layered soaking and improves the uniformity of acid contact between different layers. The design of the liquid guiding holes 42 also promotes interlayer convection, which, combined with the longitudinal flow guidance of the connecting holes on the side wall of the inner cylinder 2, enhances the scouring effect of the acid on the surface of the glassware, improves the efficiency of contaminant removal, and prevents acid concentration gradient differences caused by liquid accumulation above the shelf 4.

[0045] In practical applications, the liquid guiding hole 42 can be designed as a tapered hole with a larger top and a smaller bottom (taper 1:10) to guide the acid liquid to form a directional jet, thereby increasing the scouring force of the acid liquid on the glassware and thus improving the cleaning effect.

[0046] According to one embodiment of this application, such as Figure 6 and Figure 7 As shown, the laboratory acid cylinder also includes a vertical insert plate 5 disposed inside the inner cylinder 2. The vertical insert plate 5 divides the cavity between adjacent layers 4 in the vertical direction, and / or, the vertical insert plate 5 divides the cavity between the layers 4 and the bottom wall of the inner cylinder 2 in the vertical direction. The edge of the vertical insert plate 5 is provided with a second locking protrusion 51, and part of the second locking protrusion 51 of the vertical insert plate 5 is inserted into the first locking groove 23.

[0047] The vertical insert 5 vertically divides the inner cylinder 2 cavity, forming a three-dimensional partitioned structure in conjunction with the horizontal shelf 4, further improving the space utilization efficiency and experimental operation flexibility of the acid tank. The vertical insert 5 can divide the cavity between adjacent shelves 4 or between shelves 4 and the bottom of the tank into relatively independent immersion areas according to the shape of the glassware (such as long test tubes, wide-mouth beakers, and irregularly shaped condensers), improving the immersion and cleaning effect of each glassware. The sliding engagement between the second locking protrusion 51 on the edge of the vertical insert 5 and the first locking groove 23 on the inner wall of the inner cylinder 2 ensures simple and reliable installation and convenient disassembly. Both shelves 4 and the vertical insert 5 can be adjusted and disassembled as needed.

[0048] In practical applications, a guide groove (inclination angle 30°-45°, groove depth 2-3mm) can be set on the surface of the vertical insert plate 5 to guide the acid solution to form a spiral upward flow along the wall of the vertical insert plate 5, which enhances the vortex stirring effect in the zone, especially for cleaning the inner wall of deep and narrow containers (such as pipettes), and has a better cleaning effect.

[0049] According to one embodiment of this application, such as Figure 6 and Figure 7 As shown, the vertical insert plate 5 is also provided with a second slot 52, which is configured to cooperate with the second protrusion 51 of part of the vertical insert plate 5.

[0050] The second protrusion 51 can cooperate with the first slot 23 or the second slot 52. In other words, the vertical insert plate 5 can be arranged in two mutually perpendicular directions in the horizontal direction, such as: the vertical insert plate 5 is arranged along the length and width directions of the inner cylinder 2, so that the space between adjacent layers 4 (or between the layer 4 and the bottom wall of the inner cylinder 2) is divided into multiple relatively independent subspaces by the vertical insert plate 5.

[0051] By inserting the second slot 52 into the second protrusion 51 of the adjacent insert plate, multiple vertical insert plates 5 can be connected laterally to form a continuous partition barrier (such as dividing a single cavity into 2 to 5 independent vertical zones), which can meet the simultaneous soaking needs of glassware of different quantities and specifications. The space utilization rate is significantly improved compared with the traditional fixed partition structure, and it also avoids the situation where glassware is squeezed against each other and easily broken.

[0052] The guiding and positioning function of the second slot 52 also reduces the overall shaking amplitude after the vertical inserts 5 are assembled, maintaining stability even during ultrasonic stirring or liquid surface fluctuations, effectively improving stability compared to traditional independent insert structures. Furthermore, the interlocking structure between the vertical inserts 5 allows for quick disassembly when open partitions are needed, enabling free switching from multi-zone isolation to a single large space, particularly suitable for scenarios involving the phased processing of large instruments (such as distillation flasks) and small everyday utensils. Through the longitudinal and transverse combination of the vertical inserts 5, a "well"-shaped three-dimensional immersion unit can be constructed, enhancing the standardization of laboratory cleaning procedures.

[0053] According to one embodiment of this application, such as Figure 6 As shown, a strip-shaped liquid passage hole 53 is provided on the vertical insert plate 5, and the liquid passage hole 53 extends along the height of the inner cylinder 2.

[0054] The strip-shaped liquid passage holes 53 on the vertical insert plate 5 extend along the height direction of the inner cylinder 2, creating a synergistic structure of zone isolation and acid communication, effectively balancing the independence of the zones and the uniformity of the flow field during the soaking process. The longitudinal through-hole design of the liquid passage holes 53 allows the acid to flow between adjacent vertical zones, avoiding local acid stagnation caused by complete isolation of the insert plate, ensuring that each zone is filled with acid.

[0055] The length and width of the liquid passage 53 can be adjusted according to actual needs.

[0056] According to one embodiment of this application, such as Figure 1 As shown, the laboratory acid tank also includes an ultrasonic stirring device 6, which includes a connected ultrasonic generator and an ultrasonic transducer. The ultrasonic transducer is located at the bottom of the outer tank 1 and agitates the acidic solution in the outer tank 1.

[0057] In this embodiment, the ultrasonic stirring device 6, located at the bottom of the outer cylinder 1, constructs a highly efficient cleaning system based on cavitation effect through the direct action of the ultrasonic transducer on the acidic solution inside the outer cylinder 1. The high-frequency vibration (20-40kHz) excited by the ultrasonic transducer generates a large number of cavitation bubbles in the acid solution. The microjets released when the bubbles collapse (with a velocity of up to 10-15m / s) can effectively remove stubborn contaminants (such as metal ion deposits and organic residues) from the surface and crevices of glassware, especially significantly improving the cleaning effect on complex structural parts such as the inner wall of burettes and the neck of volumetric flasks. The macroscopic vortex formed by the acid solution in the outer cylinder 1 under ultrasonic action penetrates evenly into the inner cylinder 2 through the connecting holes between the bottom and side walls of the inner cylinder 2, promoting an increased acid renewal rate on the surface of the glassware and improving the uniformity of contamination removal for glassware of various sizes (such as beakers, test tubes, and petri dishes) in the same acid tank. The non-contact nature of ultrasonic stirring avoids the risk of vessel collision that may be caused by traditional mechanical stirring blades. At the same time, the "self-cleaning" effect of cavitation can reduce the deposition of suspended matter (such as broken glass shards) in acid, maintaining the long-term stability of the flow field in the inner cylinder 2.

[0058] According to one embodiment of this application, such as Figure 1 As shown, the ultrasonic transducers are arranged in an equilateral triangular array at the bottom of the outer cylinder 1.

[0059] In this embodiment, the ultrasonic transducers are arranged in an equilateral triangular array at the bottom of the outer cylinder 1, utilizing geometric symmetry to construct a uniformly covered sound field radiation system. This arrangement allows the ultrasonic beams emitted by each transducer to form cross-radiation regions in the acid solution, eliminating local energy blind spots through the sound wave superposition effect. This ensures that all parts of the glassware (including the neck, bottom corners, and complex curved surfaces) receive equivalent cavitation effects, avoiding uneven cleaning. The regular arrangement of the equilateral triangles guides the acid solution to form a multi-directional coupled vortex field, promoting the uniform distribution of cavitation bubbles and their continuous impact on the glassware surface. This is particularly effective at removing contaminants from the inner walls of instruments with deep holes or narrow slits (such as pipettes and colorimetric tubes). The non-contact array layout improves cleaning efficiency while avoiding the risk of glassware collisions that may occur with mechanical stirring, providing a gentle yet efficient cleaning environment for high-precision glassware.

[0060] In practical applications, phase difference control technology can be introduced on the basis of equilateral triangular arrays to make adjacent transducers work alternately with a phase difference of 1 / 4 wavelength, forming a superimposed sound field of periodic oscillation in acid, which further enhances the collapse intensity and distribution uniformity of cavitation bubbles.

[0061] In addition, a draining protrusion 12 is provided on the inner wall of the outer cylinder 1, and a matching protrusion 24 is provided on the outer wall of the inner cylinder 2. After the glassware is cleaned, the matching protrusion 24 is engaged with the draining protrusion 12, suspending the inner cylinder 2 to drain the water, allowing any residual acidic solution in the inner cylinder 2 and the glassware to drip into the outer cylinder 1. Figure 1 As shown, the two draining clips 12 on the left are positioned at a certain distance from the left side wall of the outer cylinder 1, so that the inner cylinder 2 can be inserted into the outer cylinder 1 by moving left and right, and the draining effect can be achieved.

[0062] The outer cylinder 1 is also provided with a handle 13 for moving the outer cylinder 1. The inner cylinder 2 is provided with a through-hole handle 25 for lifting the inner cylinder 2. The cylinder head 3 is provided with a handle 31 for lifting the cylinder head 3.

[0063] According to one embodiment of this application, such as Figure 4 As shown, the laboratory acid tank also includes an absorption box 7 located at the bottom of the tank cover 3. The absorption box 7 contains a gas absorbent, which is configured to absorb acidic gases in the closed cavity.

[0064] In this embodiment, the absorption box 7, located at the bottom of the cylinder cover 3, constructs an active adsorption barrier for acidic gases using a built-in gas absorbent. The absorption box 7 directly covers the enclosed cavity, allowing volatile acidic gases (such as sulfuric acid mist and hydrochloric acid mist) to come into full contact with the absorbent as they rise, effectively capturing and neutralizing harmful components and significantly reducing the concentration of acid mist in the laboratory environment. The directional arrangement of the gas absorbent synergizes with the closed structure of the cylinder cover 3, transforming the traditional passive ventilation mode of acid cylinders into a dual protection of "sealed barrier + active absorption." This is particularly effective in open operation scenarios (such as when briefly opening the cover to remove or place containers), quickly adsorbing escaping gases and reducing the direct exposure risk to operators. The detachable design of the absorption box 7 facilitates regular replacement of the absorbent, maintaining continuous gas processing capacity, preventing long-term accumulation of acidic gases from corroding cylinder components (such as sealing rings and metal buckles), and extending the overall service life of the acid cylinder.

[0065] A sealing ring can also be provided on the lower surface of the cylinder head 3. A buckle 32 can be provided on the cylinder head 3, and a corresponding sealing groove 11 is provided on the outer cylinder 1. The buckle 32 is inserted into the sealing groove 11 so that the cylinder head 3 presses against the outer cylinder 1 to improve the sealing performance.

[0066] The absorption box 7 can be designed as a multi-layer composite structure, with different gas absorbents placed in different layers. For example, the gas absorbents may include activated carbon and alkaline materials such as sodium hydroxide.

[0067] A guide groove can also be set at the edge of the absorption box 7 to guide the gas through the absorbent layer in a spiral shape, thereby increasing the contact time between the acid gas and the gas absorbent and improving the adsorption and reaction effect.

[0068] According to one embodiment of this application, the laboratory acid tank further includes a discharge pipe assembly 8 connected to the outer tank 1, such as... Figure 1 As shown; the liquid discharge tube assembly 8 includes an outer tube and an inner tube (not shown in the figure), with the outer tube sleeved outside the inner tube; a heating wire is provided on the outer surface of the outer tube, and a heating medium is filled between the outer tube and the inner tube.

[0069] In this embodiment, the discharge pipe assembly 8, connected to the outer cylinder 1, adopts a double-layer sleeve structure. The heating wire on the outer side of the outer pipe, together with the heating medium between the pipes, constructs a temperature maintenance system for the acid discharge process. Through the active temperature control of the heating wire in the outer pipe, the acidic solution (especially high-concentration, high-viscosity acid) in the inner pipe is kept in a suitable flow state during discharge, effectively avoiding problems such as crystallization, adhesion, or retention caused by excessively low temperatures, significantly improving the smoothness and reliability of the discharge process. The uniform thermal conductivity of the heating medium can eliminate the temperature gradient inside the pipe, preventing the influence of local overheating on the properties of the acid. At the same time, the outer pipe's wrapping protection of the inner pipe enhances the overall structural strength of the discharge pipe, reducing the risk of pipe damage caused by external impact or corrosion. The double-layer sleeve design upgrades the traditional single discharge function of the discharge pipe into a composite functional unit of "temperature controllable + structural protection," which is particularly suitable for the safe discharge of highly sensitive acidic solutions such as concentrated sulfuric acid and potassium dichromate mixtures, reducing the potential risk of pipe blockage and leakage from the source.

[0070] A drain pipe buckle 14 can also be installed on the outer cylinder 1 to fix the drain pipe assembly 8.

[0071] The laboratory acid tank provided in this application can be arranged individually, separately, and in layers according to the size of the glassware, avoiding collisions and breakage between multiple glassware during handling; it allows acid to flow into the glassware automatically, avoiding the safety risks of manual pressing; it can effectively avoid the safety and environmental risks caused by acid gas leakage; and it allows for convenient discharge of waste liquid from the acid tank.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate this application and are not intended to limit this application. Although this application has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications, or equivalent substitutions of the technical solutions of this application do not depart from the spirit and scope of the technical solutions of this application and should be covered within the scope of the claims of this application.

Claims

1. A laboratory acid cylinder, comprising an outer cylinder (1), an inner cylinder (2), and a cylinder cover (3), wherein the cylinder cover (3) is fastened to the upper opening of the outer cylinder (1) to form a closed cavity, and the inner cylinder (2) is placed in the closed cavity, characterized in that, The bottom wall of the inner cylinder (2) is provided with a first connecting hole (21), and the side wall of the inner cylinder (2) is provided with a strip-shaped second connecting hole (22). The second connecting hole (22) extends along the height of the inner cylinder (2), and the acidic solution in the outer cylinder (1) enters the inner cylinder (2) through the first connecting hole (21) and the second connecting hole (22).

2. The laboratory acid tank according to claim 1, characterized in that, It also includes a shelf (4) disposed inside the inner cylinder (2), the shelf (4) dividing the internal cavity of the inner cylinder (2) in a horizontal direction; The edge of the shelf (4) is provided with a first locking protrusion (41), and the inner wall of the inner cylinder (2) is provided with a first locking groove (23) extending along the height direction. The first locking protrusion (41) extends into the first locking groove (23) so that the shelf (4) can move up and down in the inner cylinder (2) and be fixed in a preset position.

3. The laboratory acid tank according to claim 2, characterized in that, The layer plate (4) is provided with liquid guiding holes (42).

4. The laboratory acid tank according to claim 2, characterized in that, It also includes a vertical insert plate (5) disposed in the inner cylinder (2), the vertical insert plate (5) dividing the cavity between adjacent layers (4) in the vertical direction, and / or, the vertical insert plate (5) dividing the cavity between the layers (4) and the bottom wall of the inner cylinder (2) in the vertical direction; The edge of the vertical insert (5) is provided with a second latch (51), and part of the second latch (51) of the vertical insert (5) is inserted into the first slot (23).

5. The laboratory acid tank according to claim 4, characterized in that, The vertical insert plate (5) is also provided with a second slot (52), which is configured to cooperate with the second protrusion (51) of a portion of the vertical insert plate (5).

6. The laboratory acid tank according to claim 4, characterized in that, The vertical insert plate (5) is provided with a strip-shaped liquid passage hole (53), which extends along the height of the inner cylinder (2).

7. The laboratory acid tank according to any one of claims 1 to 6, characterized in that, It also includes an ultrasonic stirring device (6), which includes an ultrasonic generator and an ultrasonic transducer connected together. The ultrasonic transducer is located at the bottom of the outer cylinder (1) and the ultrasonic transducer agitates the acidic solution in the outer cylinder (1).

8. The laboratory acid tank according to claim 7, characterized in that, The ultrasonic transducers are arranged in an equilateral triangle array at the bottom of the outer cylinder (1).

9. The laboratory acid tank according to any one of claims 1 to 6, characterized in that, It also includes an absorption box (7) disposed at the bottom of the cylinder head (3), wherein a gas absorbent is disposed in the absorption box (7), and the gas absorbent is configured to absorb acidic gas in the closed cavity.

10. The laboratory acid tank according to any one of claims 1 to 6, characterized in that, It also includes a discharge pipe assembly (8) connected to the outer cylinder (1), the discharge pipe assembly (8) includes an outer pipe and an inner pipe, the outer pipe is sleeved on the outside of the inner pipe; a heating wire is provided on the outer surface of the outer pipe, and a heating medium is filled between the outer pipe and the inner pipe.

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