Ventilation cabinet for detecting volatile gas in polymer
By setting up a fume hood and a table panel in the fume hood to form a closed chamber, and using positioning rings and sealing rings to improve gas capture efficiency, the problem of pentachlorothiophenol volatile gas diffusion is solved, and the safety of polymer detection is improved.
Patent Information
- Application Number
- CN202422108638.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-29
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2034-08-29
AI Technical Summary
When testing the content of pentachlorothiophenol in polymers, pentachlorothiophenol is extremely volatile and difficult to be effectively captured by the fume hood, causing respiratory damage to the operator. In addition, the gas diffuses severely when the fume hood is open, affecting laboratory safety.
A fume hood is designed, which includes an operating table, a ventilation component and a fixing component. The fume hood and the table panel form a closed chamber connected to the ventilation duct. Combined with a positioning ring and a sealing ring, the gas capture efficiency is improved and gas diffusion is reduced.
It effectively reduces the flow of volatile gases in the confined space of the laboratory, improves the safety of operators, and reduces the harm of pentachlorothiophenol to the human body.
Smart Images
Figure CN223325198U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fume hoods, in particular to a fume hood used for detecting volatile gases in polymers. Background Art
[0002] Pentachlorothiophenol (PCT) testing is a recent addition to polymer testing regulations. The U.S. Toxic Substances Control Act (TSCA) limits the content of PCT in all articles to no more than 1%. The EPA prohibits the manufacture (including import), processing, and commercial distribution of PCT and products or articles containing PCT unless the concentration is 1% by weight or less.
[0003] Pentachlorothiophenol is a chemical used as a plasticizing accelerator for natural rubber, neoprene, nitrile rubber, styrene-butadiene rubber, and butyl rubber. It is also widely used in pesticides. The hazards of pentachlorothiophenol are: it is highly volatile and difficult to decompose. Long-range pentachlorothiophenol pollution can even contaminate uninhabited areas, severely damaging the ecological environment. Pentachlorothiophenol is carcinogenic and toxic to protozoa, fish, terrestrial plants, and birds.
[0004] During the testing of pentachlorothiophenol (PCT) content in polymers, PCT is highly volatile and difficult to decompose, so it can penetrate the operator's mask and cause respiratory damage. When the operator is testing the PCT content in polymers and needs to leave temporarily due to an emergency, the fume hood is open, and even pulling down the fume hood window will not effectively reduce the flow of PCT in the confined laboratory space. This application provides a solution to reduce the harm caused to the operator by volatile gases in the polymer. Utility Model Content
[0005] The present application provides a fume hood for detecting volatile gases in polymers. When an operator is detecting volatile gases in a polymer, the flow of volatile gases in a confined space of a laboratory is reduced, thereby improving the safety of the operator during the process of detecting polymer content.
[0006] The present application provides a fume hood for detecting volatile gases in polymers, comprising a cabinet body and an operating table arranged in the cabinet body; the operating table is provided with a table panel for placing the polymer to be tested, a ventilation component arranged on the table panel, and a fixing component for fixing the ventilation component; the ventilation component includes a ventilation hood and a ventilation duct connected to the ventilation hood, the cabinet body is provided with a fixing plate on one side of the table panel, and a ventilation cavity is provided on the back side of the fixing plate, and the cavity of the ventilation duct is communicated with the ventilation cavity; the ventilation hood cover is provided on a cup body on which the polymer to be tested is placed, and the closed cavity formed by the ventilation hood and the table panel is communicated with the ventilation duct.
[0007] Optionally, the fixing assembly includes a positioning ring for fixing the ventilation hood and a positioning rod for supporting the positioning ring, the positioning rod is installed on the fixing plate, one side of the positioning ring is fixed on the positioning rod, and one side of the positioning ring is provided with a notch for the ventilation duct to pass through; the side of the ventilation hood close to the ventilation duct abuts against the top of the positioning ring.
[0008] Optionally, a ventilation cover is further provided on the fixing plate, a plurality of ventilation holes are opened on the ventilation cover, a wind cavity is formed between the back side of the ventilation cover and the cabinet, and the wind cavity is communicated with the ventilation cavity.
[0009] Optionally, the table top is provided with a placement plate for fixing and placing the polymer to be tested.
[0010] Optionally, the table panel is provided with a positioning groove on the peripheral side of the placement plate for fixing the bottom of the ventilation hood wall.
[0011] Optionally, a sealing ring is provided on the groove wall of the positioning groove, and a sealing groove for the sealing ring to pass through is opened at the bottom of the ventilation hood wall.
[0012] Optionally, a limit block is provided on the outer side of the ventilation hood wall, and a limit groove for the limit block to pass through is opened on the groove wall of the table panel located at the positioning groove, and a snap-in groove for the limit block to be rotated and snapped into is opened on one side wall of the limit groove.
[0013] One or more technical solutions provided in this application have at least the following technical effects or advantages:
[0014] 1. The present application adopts a fume hood operating table provided with a table panel for placing the polymer to be tested, as well as a ventilation component and a fixing component arranged on the table panel; wherein, the ventilation hood cover on the ventilation component is arranged on the cup body on which the polymer to be tested is placed, and the closed chamber formed by the ventilation hood and the table panel is connected to the ventilation duct to absorb the volatile gas, thereby reducing the flow of volatile gas in the closed space of the laboratory.
[0015] 2. This application uses a positioning ring on a fixing assembly to fix the unused ventilation hood. At this time, the side of the ventilation hood close to the ventilation duct is against the top of the positioning ring, and the ventilation duct is inserted into the gap of the positioning ring, thereby fixing the ventilation hood and improving the stability of the ventilation hood storage.
[0016] 3. The present application adopts a method of providing a positioning groove on the peripheral side of the table panel where the placement plate is located for fixing the bottom of the ventilation hood wall, and a sealing ring is provided on the groove wall of the positioning groove, and a sealing groove for the sealing ring to pass through is provided at the bottom of the ventilation hood wall, thereby increasing the airtightness inside the ventilation hood, reducing the flow of volatile gases in the ventilation hood into the laboratory, and improving the safety of operators during the detection of polymer content. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0018] Figure 1 Schematic diagram of the overall structure of a fume hood for detecting volatile gases in polymers in an embodiment of the present application;
[0019] Figure 2 Schematic diagram of the overall structure of a fume hood for detecting volatile gases in polymers in an embodiment of the present application;
[0020] Figure 3 This is a schematic diagram of a portion of the structure of a fume hood used to detect volatile gases in polymers in an embodiment of the present application;
[0021] Figure 4 This is a schematic diagram of a portion of the structure of a fume hood used to detect volatile gases in polymers in an embodiment of the present application;
[0022] Figure 5 This is a partial structural diagram of the table panel in the embodiment of the present application;
[0023] Figure 6 This is a schematic diagram of the overall structure of the ventilation hood in the embodiment of the present application;
[0024] Figure 7 This is a partial structural diagram of a table top in another embodiment of the present application.
[0025] Explanation of the accompanying drawings: 1. Cabinet; 11. Glass plate; 2. Operating table; 21. Table panel; 211. Fixing plate; 212. Ventilation opening; 213. Ventilation cover; 2131. Ventilation hole; 214. Placement plate; 215. Positioning groove; 2151. Limiting groove; 2152. Snap-in groove; 216. Sealing ring; 22. Ventilation assembly; 221. Ventilation hood; 2211. Sealing groove; 2212. Limiting block; 222. Ventilation duct; 23. Fixing assembly; 231. Positioning ring; 2311. Notch; 232. Positioning rod. DETAILED DESCRIPTION
[0026] The present application provides a fume hood for detecting volatile gases in polymers. When an operator is detecting volatile gases in a polymer, the flow of volatile gases in a confined space of a laboratory is reduced, thereby improving the safety of the operator during the process of detecting polymer content.
[0027] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only some of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of this application.
[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or server that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or modules that are not clearly listed or inherent to these processes, methods, products, or devices.
[0029] Reference Figure 1 and Figure 2 In this embodiment, a fume hood for detecting volatile gases in polymers includes a cabinet body 1 and an operating table 2 disposed in the cabinet body 1. A glass plate 11 is disposed on the cabinet body 1, and the space where the operating table 2 is located is sealed by the glass plate 11. Figure 1 This is the state when the glass plate 11 is placed on the workbench 2 .
[0030] Combine Figure 3 Furthermore, the operating table 2 is provided with a table panel 21 for placing the polymer to be tested, a ventilation component 22 provided on the table panel 21 and a fixing component 23 for fixing the ventilation component 22 .
[0031] The ventilation assembly 22 includes a ventilation hood 221 and a ventilation duct 222 connected to the ventilation hood 221. The ventilation hood 221 is placed on the cup containing the polymer to be tested, thereby reducing the volatile gas from evaporating from the cup to be tested and diffusing onto the operating table 2 or even the laboratory.
[0032] Specifically, refer to Figure 3 and Figure 4 The cabinet body 1 is provided with a fixed plate 211 on one side of the table panel 21, and a ventilation cavity (not clearly shown in the figure) is provided on the back of the fixed plate 211. A vent 212 is provided on the fixed plate 211, and a ventilation duct 222 is connected to the vent 212 so that the chamber of the ventilation duct 222 and the ventilation cavity are interconnected. Furthermore, the enclosed chamber formed by the ventilation hood 221 and the table panel 21 is in communication with the ventilation duct 222. Thus, volatile gases generated in the enclosed chamber formed by the ventilation hood 221 and the table panel 21 can enter the ventilation cavity.
[0033] In addition, in this embodiment, the ventilation duct 222 is a rubber hose with a certain degree of deformation ability and is sleeved on the ventilation opening 212 to improve the sealing between the ventilation duct 222 and the ventilation cavity.
[0034] Reference Figure 4 The fixing assembly 23 includes a positioning ring 231 for fixing the ventilation hood 221 and a positioning rod 232 for supporting the positioning ring 231. The positioning rod 232 is fixedly mounted on the fixing plate 211. Furthermore, one side of the positioning ring 231 is integrally connected to the positioning rod 232. A notch 2311 is defined on one side of the positioning ring 231 for the ventilation duct 222 to pass through. In this embodiment, the side of the ventilation hood 221 proximal to the ventilation duct 222 abuts against the top of the positioning ring 231. The ventilation duct 222 is inserted through the notch 2311 of the positioning ring 231, thereby securing the ventilation hood 221 and improving the stability of the ventilation hood 221 when stored.
[0035] In addition, in this embodiment, a ventilation cover 213 is provided on the fixed plate 211. The ventilation cover 213 is provided with a plurality of ventilation holes 2131. The back side of the ventilation cover 213 forms an air cavity with the cabinet 1, and the air cavity and the ventilation cavity are in communication. When the glass plate 11 is placed on the operating table 2, the fan behind the air cavity is turned on to further absorb volatile gases remaining on the operating table 2, thereby improving the air quality in the testing laboratory.
[0036] Reference Figure 4 and Figure 5 , a placement plate 214 for fixing and placing the polymer to be tested is provided on the table panel 21. Further, a plurality of placement plates 214 for fixing and placing the polymer to be tested are provided on the table panel 21, and each placement plate 214 has a different size. Figure 5 In the embodiment of the present application, three small-sized placement plates 214 are provided on one side of the table panel 21, and a large-sized placement plate 214 is provided on the other side of the table panel 21, so that the placement plates 214 can support cups of different sizes.
[0037] Among them, reference Figure 5 and Figure 6Taking one of the placement plates 214 as an example, the tabletop 21 is provided with a positioning groove 215 around the placement plate 214 for securing the bottom of the hood 221. Furthermore, a sealing ring 216 is sleeved on the groove wall of the positioning groove 215, and a sealing groove 2211 is provided at the bottom of the hood 221 for the sealing ring 216 to pass through. This improves the airtightness within the hood 221, reduces the flow of volatile gases from the hood 221 into the laboratory, and enhances operator safety during polymer content testing.
[0038] Further, refer to Figure 7 In another embodiment of the present application, a limit block 2212 is integrally provided on the outer side of the hood wall of the ventilation hood 221. A limit slot 2151 for the limit block 2212 to pass through is formed on the wall of the positioning slot 215 of the table panel 21. A snap-in slot 2152 is formed on one side wall of the limit slot 2151 for the limit block 2212 to be rotatably engaged. When the ventilation hood 221 needs to be placed on the cup body, the limit block 2212 on the ventilation hood 221 needs to be inserted into the limit slot 2151, and the ventilation hood 221 is rotated so that the limit block 2212 is engaged with the snap-in slot 2152. This improves the stability of the ventilation hood 221 fixed to the placement plate 214, reduces the probability of the ventilation hood 221 tipping over, and further reduces the probability of volatile gases leaking from the operating table 2.
[0039] It should be noted that the above-mentioned order of the embodiments of the present application is for descriptive purposes only and does not represent the superiority or inferiority of the embodiments. The above description is of specific embodiments of this specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps described in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.
[0040] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.
[0041] This specification and drawings are merely illustrative of the present application and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of this application. Obviously, those skilled in the art may make various modifications and variations to this application without departing from the scope of this application. Thus, this application is intended to include such modifications and variations as fall within the scope of this application and its equivalents.
Claims
1. A fume hood for detecting volatile gases in polymers, characterized in that: It comprises a cabinet (1) and an operating table (2) arranged in the cabinet (1); The operating table (2) is provided with a table panel (21) for placing the polymer to be tested, a ventilation component (22) provided on the table panel (21), and a fixing component (23) for fixing the ventilation component (22); The ventilation assembly (22) comprises a ventilation hood (221) and a ventilation duct (222) connected to the ventilation hood (221); a fixing plate (211) is provided on one side of the cabinet (1) located on the table panel (21); a ventilation cavity is provided on the back side of the fixing plate (211); and a chamber of the ventilation duct (222) is communicated with the ventilation cavity; The ventilation hood (221) is covered on the cup body on which the polymer to be tested is placed, and the closed chamber formed by the ventilation hood (221) and the table panel (21) is communicated with the ventilation duct (222).
2. The fume hood for detecting volatile gases in polymers according to claim 1, wherein: The fixing assembly (23) comprises a positioning ring (231) for fixing the ventilation hood (221) and a positioning rod (232) for supporting the positioning ring (231); the positioning rod (232) is mounted on the fixing plate (211); one side of the positioning ring (231) is fixed on the positioning rod (232); one side of the positioning ring (231) is provided with a notch (2311) for the ventilation duct (222) to pass through; the side of the ventilation hood (221) close to the ventilation duct (222) abuts against the top of the positioning ring (231).
3. The fume hood for detecting volatile gases in polymers according to claim 1, wherein: The fixing plate (211) is further provided with a ventilation cover (213), and a plurality of ventilation holes (2131) are provided on the ventilation cover (213). The back side of the ventilation cover (213) and the cabinet (1) form an air cavity, and the air cavity is in communication with the ventilation cavity.
4. The fume hood for detecting volatile gases in polymers according to claim 2, wherein: The table panel (21) is provided with a placement plate (214) for fixing and placing the polymer to be tested.
5. The fume hood for detecting volatile gases in polymers according to claim 4, characterized in that: The table panel (21) is provided with a positioning groove (215) on the peripheral side of the placement plate (214) for fixing the bottom of the hood wall of the ventilation hood (221).
6. The fume hood for detecting volatile gases in polymers according to claim 5, characterized in that: A sealing ring (216) is provided on the groove wall of the positioning groove (215), and a sealing groove (2211) for the sealing ring (216) to pass through is provided at the bottom of the hood wall of the ventilation hood (221).
7. The fume hood for detecting volatile gases in polymers according to claim 5, wherein: A limiting block (2212) is provided on the outer side of the ventilation hood (221) wall, a limiting groove (2151) for the limiting block (2212) to pass through is provided on the groove wall of the table panel (21) located at the positioning groove (215), and a snap-in groove (2152) for the limiting block (2212) to be rotatably snapped into is provided on one side wall of the limiting groove (2151).