Emergency isolation system for hazardous substance leakage in laboratory fume hood

Abstract

The utility model discloses a laboratory fume hood in dangerous chemical product leak emergency isolation system, in the first time of dangerous chemical product leak occurrence, the operator can quickly pull the funnel isolation cover cover spilled dangerous chemical product, because the first end of multisection telescopic pipe and negative pressure chamber intercommunication, the end of multisection telescopic pipe passes through the metal bellows and communicates funnel isolation cover, this forms effective negative pressure in the funnel isolation cover, and the dangerous chemical product of spilled operation platform is isolated in the funnel isolation cover, thereby effectively prevented the dangerous chemical product through the security glass door and escaped the phenomenon of occurrence, on the other hand, the application follows this gist of blocking and covering adsorption, first through funnel isolation cover and carry out the blocking of spilled dangerous chemical product, and the edge of funnel isolation cover is filled with detachable replacement chemical adsorption cotton, and after the blocking of spilled dangerous chemical product is completed, handheld funnel isolation cover, keep the while pushing and pulling and reciprocating translation of the funnel isolation cover of down pressure force, ensure that the spilled dangerous chemical product is fully absorbed by chemical adsorption cotton.

Description

Technical Field

[0001] This application belongs to the field of laboratory safety equipment technology, specifically relating to an emergency response system for hazardous chemical leaks in a chemical laboratory fume hood, which is particularly suitable for handling highly corrosive and toxic reagents in pharmaceutical companies and research institutes. Background Technology

[0002] A laboratory fume hood is a sealed workspace that also allows for ventilation. In most laboratories, fume hoods are the primary control equipment protecting laboratory operators from toxic and harmful chemicals. Simultaneously, even at their minimum operating height, fume hoods provide protection against sudden fires, explosions, and chemical splashes. A typical fume hood consists of a cabinet with a sliding door made of safety or tempered glass. All fume hoods operate on the principle of effectively controlling toxic and harmful substances. The relative negative pressure environment effectively prevents the diffusion of these substances, while fresh air enters the sealed interior through the sliding door at a steady speed. Appropriate face velocity plays a crucial role in the safe and efficient operation of a fume hood.

[0003] During the experiment, there were occasional instances of liquid spills onto the operating table. Toxic and harmful liquids can spread rapidly due to large-area spills. At this time, due to the low surface velocity, the diffusion area is located at the farthest point from the negative pressure vent at the top. Toxic and harmful liquids are highly likely to escape through the safety glass door, posing a great risk. Utility Model Content

[0004] The purpose of this application is to provide an emergency isolation system for hazardous chemical leaks in laboratory fume hoods. In the immediate event of a hazardous chemical leak, operators can quickly pull the funnel isolation hood to cover the spilled hazardous chemicals. Because the first end of the multi-section telescopic pipe is connected to the negative pressure chamber, and the end of the multi-section telescopic pipe is connected to the funnel isolation hood through a metal corrugated pipe, an effective negative pressure is formed inside the funnel isolation hood. The hazardous chemicals spilled on the work surface are isolated inside the funnel isolation hood, thereby effectively preventing the hazardous chemicals from escaping through the safety glass door.

[0005] To achieve the above objectives, this utility model provides an emergency isolation system for hazardous chemical leaks inside a laboratory fume hood. The system comprises a fume hood with an operating table inside. A back partition and a top partition are respectively provided on the back and top of the operating table. A negative pressure chamber is formed between the back partition, the top partition, and the inner wall of the fume hood. A negative pressure adsorption hood is provided above the fume hood, connecting to the negative pressure chamber. A window is opened in the back partition, connecting the operating table and the negative pressure chamber. A cover is sealed to the window. Multiple telescopic tubes are arranged in the center of the cover. The first end of each telescopic tube connects to the negative pressure chamber. A metal corrugated pipe is vertically installed at the end of each telescopic tube. The upper end of the metal corrugated pipe connects to the end of the telescopic tube. A funnel-shaped isolation hood is fitted over the lower end of the metal corrugated pipe.

[0006] Furthermore, this utility model provides an emergency isolation system for hazardous chemical leaks in a laboratory fume hood. The outer edge of the funnel-shaped isolation cover is provided with a groove filled with chemical absorbent cotton. Traditional hazardous chemical leak handling methods involve containment and absorption, and this application's design also follows this principle. First, the spilled hazardous chemical is contained using the funnel-shaped isolation cover. Removable and replaceable chemical absorbent cotton is then placed around the edge of the funnel-shaped isolation cover. After containing the spilled hazardous chemical, the funnel-shaped isolation cover is held by hand, and while maintaining downward pressure, it is pushed, pulled, and moved back and forth to ensure that the spilled hazardous chemical is fully absorbed by the chemical absorbent cotton.

[0007] Furthermore, this utility model provides an emergency isolation system for hazardous chemical leaks in a laboratory fume hood, wherein the cover plate has an elongated groove, and the inner wall of the cover plate is provided with a pair of corner brackets. The first end of the multi-section telescopic tube extends through the elongated groove into the negative pressure chamber. The first end of the multi-section telescopic tube is connected to the two corner brackets by a pin. The multi-section telescopic tube is fitted with a corrugated rubber sleeve. The inner end of the corrugated rubber sleeve is bonded to the surface of the cover plate by structural adhesive. The inner end of the corrugated rubber sleeve covers the elongated groove, and the outer end of the corrugated rubber sleeve is bonded to the tube wall of the multi-section telescopic tube by structural adhesive.

[0008] This application has the following advantages over the prior art:

[0009] On the one hand, in the immediate event of a hazardous chemical leak, operators can quickly pull the funnel-shaped isolation cover to contain the spilled hazardous chemicals. Because the ends of the multi-section telescopic pipes are connected to the negative pressure chamber, and the ends are connected to the funnel-shaped isolation cover via a metal corrugated pipe, an effective negative pressure is created within the funnel-shaped isolation cover. The hazardous chemicals spilled on the work surface are isolated within the funnel-shaped isolation cover, effectively preventing the hazardous chemicals from escaping through the safety glass door. On the other hand, the design of this application follows the principle of containment and absorption. First, the spilled hazardous chemicals are contained using the funnel-shaped isolation cover. Removable and replaceable chemical absorbent cotton is installed around the edge of the funnel-shaped isolation cover. After containing the spilled hazardous chemicals, the operator holds the funnel-shaped isolation cover, maintaining downward pressure while pushing, pulling, and reciprocating to ensure that the spilled hazardous chemicals are fully absorbed by the chemical absorbent cotton. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of a laboratory fume hood emergency isolation system for hazardous chemical leaks, showing the removal of the side panel.

[0011] Figure 2 This is a partial structural diagram of an emergency isolation system for hazardous chemical leaks inside a laboratory fume hood, according to the present invention.

[0012] Figure 3 for Figure 2 Schematic diagram of the changing orientation structure.

[0013] The components include: 1. Fume hood; 2. Operating table; 3. Back partition; 4. Top partition; 5. Negative pressure chamber; 6. Negative pressure adsorption hood; 7. Cover plate; 8. Multi-section telescopic tube; 9. Corrugated metal pipe; 10. Funnel isolation hood; 11. Slot; 12. Chemical adsorption cotton; 13. Long slot; 14. Corner code; 15. Pin shaft; 16. Corrugated rubber sleeve. Detailed Implementation

[0014] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0015] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the equipment or component 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 this application. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0016] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0017] like Figures 1-3 As shown, this embodiment provides an emergency isolation system for hazardous chemical leaks inside a laboratory fume hood 1. The system includes a fume hood 1, an operating table 2 inside the fume hood 1, a back partition 3 and a top partition 4 on the back and top of the operating table 2 respectively, forming a negative pressure chamber 5 between the back partition 3, the top partition 4 and the inner wall of the fume hood 1. A negative pressure adsorption hood 6 is provided above the fume hood 1, connecting to the negative pressure chamber 5. A window is opened in the back partition 3, connecting the operating table 2 and the negative pressure chamber 5. A cover 7 is provided to seal the window. A multi-section telescopic tube 8 is provided in the center of the cover 7, with its first end connected to the negative pressure chamber 5. A metal corrugated tube 9 is vertically installed at the end of the multi-section telescopic tube 8, with its upper end connected to the end of the multi-section telescopic tube 8. A funnel-shaped isolation cover 10 is fitted over the lower end of the metal corrugated tube 9. A groove 11 is provided around the outer edge of the funnel-shaped isolation cover 10, and chemical absorbent cotton 12 is filled in the groove 11.

[0018] To accommodate emergency handling of hazardous chemical spills over a wider area, the cover plate 7 has an elongated groove 13, and a pair of corner brackets 14 are provided on the inner wall of the cover plate 7. The first end of the multi-section telescopic tube 8 extends through the elongated groove 13 into the negative pressure chamber 5. The first end of the multi-section telescopic tube 8 is connected to the two corner brackets 14 by a pin 15. The multi-section telescopic tube 8 is fitted with a corrugated rubber sleeve 16. The inner end of the corrugated rubber sleeve 16 is bonded to the surface of the cover plate 7 with structural adhesive. The inner end of the corrugated rubber sleeve 16 covers the elongated groove 13, and the outer end of the corrugated rubber sleeve 16 is bonded to the tube wall of the multi-section telescopic tube 8 with structural adhesive.

[0019] The usage process and principle of an emergency isolation system for hazardous chemical leaks inside a laboratory fume hood 1 in this embodiment are as follows:

[0020] In the event of a hazardous chemical spill, immediately pull the funnel isolation cover 10 manually. The first end of the multi-section telescopic tube 8 can rotate around the pin 15, and the extension length of the multi-section telescopic tube 8 can be adjusted. The metal corrugated pipe 9 installed at the lower end of the multi-section telescopic tube 8 has bendability, so the position of the funnel isolation cover 10 can also be adjusted locally to ensure that the funnel isolation cover 10 completely covers the spilled hazardous chemicals. While maintaining the downward pressure, push, pull, and reciprocate to move the funnel isolation cover 10 to ensure that the spilled hazardous chemicals are fully absorbed by the chemical absorbent cotton 12. At this time, reset the funnel isolation cover 10, take out a sealing bag to cover the funnel isolation cover 10, remove the chemical absorbent cotton, seal the sealing bag, and place it in the hazardous waste collection bag.

[0021] Any aspects not detailed in this application are well-known to those skilled in the art.

[0022] The preferred embodiments of this application have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this application without inventive effort. Therefore, any technical solutions that can be obtained by those skilled in the art based on the concept of this application through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. An emergency isolation system for hazardous chemical leaks inside a laboratory fume hood, characterized in that, The system includes a fume hood (1), an operating table (2) is provided inside the fume hood (1), a back partition (3) and a top partition (4) are provided on the back and top of the operating table (2) respectively, a negative pressure cavity (5) is formed between the back partition (3), the top partition (4) and the inner wall of the fume hood (1), a negative pressure adsorption hood (6) is provided above the fume hood (1), and the negative pressure adsorption hood (6) is connected to the negative pressure cavity (5); a window is opened on the back partition (3), the window is connected to the operating table (2) and the negative pressure cavity (5), a cover plate (7) is provided to seal the window, a multi-section telescopic tube (8) is provided in the center of the cover plate (7), the first end of the multi-section telescopic tube (8) is connected to the negative pressure cavity (5), a metal corrugated tube (9) is vertically provided at the end of the multi-section telescopic tube (8), the upper end of the metal corrugated tube (9) is connected to the end of the multi-section telescopic tube (8), and a funnel isolation cover (10) is fitted on the lower end of the metal corrugated tube (9).

2. The emergency isolation system for hazardous chemical leaks inside a laboratory fume hood according to claim 1, characterized in that, The outer edge of the funnel isolation cover (10) is provided with a groove (11), and the groove (11) is filled with chemical absorbent cotton (12).

3. The emergency isolation system for hazardous chemical leaks inside a laboratory fume hood according to claim 1, characterized in that, The cover plate (7) has an elongated groove (13), and a pair of corner brackets (14) are provided on the inner wall of the cover plate (7). The first end of the multi-section telescopic tube (8) extends through the elongated groove (13) into the negative pressure chamber (5). The first end of the multi-section telescopic tube (8) is connected to the two corner brackets (14) by a pin (15). The multi-section telescopic tube (8) is fitted with a corrugated rubber sleeve (16). The inner end of the corrugated rubber sleeve (16) is bonded to the surface of the cover plate (7) by structural adhesive. The inner end of the corrugated rubber sleeve (16) covers the elongated groove (13), and the outer end of the corrugated rubber sleeve (16) is bonded to the tube wall of the multi-section telescopic tube (8) by structural adhesive.

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