An atomic absorption cell for experimental detection

Abstract

The application relates to the technical field of experimental instruments, in particular to an atomic absorption cover for experimental detection, which comprises an expansion cover and a wind guide pipe fixedly installed at the upper end of the expansion cover, the upper end of the wind guide pipe is provided with a gathering cover, the upper end of the gathering cover is fixedly provided with a wind guide fan, one side of the wind guide fan is provided with an exhaust pipe, and the inside of the wind guide pipe is fixedly provided with two air distribution plates; compared with the prior art, the atomic absorption cover can realize multi-mode selection during gas absorption by being provided with the expansion cover, an adjusting mechanism, a first air distribution plate, a second air distribution plate and the air distribution plates arranged in the inside of the wind guide pipe, can be arbitrarily switched for use in large-area air suction or channel air suction according to actual use requirements, and can solve the defects of a traditional fixed atomic absorption cover, can realize large-area air suction and prevent harmful gas from overflowing, and can realize strong air suction in a small-area range and improve air suction effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of experimental instruments, in particular to an atomic absorption cover for experimental detection. BACKGROUND

[0002] The atomic absorption cover is one of the necessary equipment in the laboratory. The atomic absorption cover is mainly used to quickly discharge small particles of suspended matter or gas such as small-range dust, hot gas, volatile gas, harmful gas generated in the experimental or production process, so as to protect the health of the operating personnel and the surrounding personnel.

[0003] At present, the traditional atomic absorption cover is generally divided into two types, top type and table type. The top type atomic absorption cover is installed above the experimental operation table, which has the advantage of wide absorption range, but the suction force is relatively dispersed, and the air exhaust effect is not ideal. The table type atomic absorption cover is generally fixedly installed at the top of the centralized absorption area, which has small absorption range but strong and concentrated suction force. However, some gas may overflow outside the suction range, thereby causing certain absorption problems. Therefore, the present application provides an atomic absorption cover for experimental detection. SUMMARY

[0004] The present application aims to provide an atomic absorption cover for experimental detection to solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: an atomic absorption cover for experimental detection, comprising an expansion cover and a wind guide tube fixedly installed at the upper end of the expansion cover, a gathering cover is installed at the upper end of the wind guide tube, an air induction fan is fixedly installed at the upper end of the gathering cover, an exhaust pipe is arranged on one side of the air induction fan, two air distribution plates are fixedly installed inside the wind guide tube, an adjusting mechanism is installed at the bottom position of the front side inner wall of the wind guide tube, a first air distribution plate and a second air distribution plate are rotatably installed at the lower end of the adjusting mechanism, and the first air distribution plate and the second air distribution plate are arranged in the expansion cover, a winding device is installed on the outer wall of each side of the expansion cover, an isolation film is wound around each of the two winding devices, and the bottom of the first air distribution plate and the second air distribution plate is respectively installed at the end of the isolation film away from the winding device.

[0006] As a preferred technical scheme of the present application, the adjusting mechanism comprises an adjusting box, four horizontally arranged gears are rotatably installed in the adjusting box, and the adjacent gears are meshed with each other. The four gears are sequentially a first adjusting gear, a driving gear, a linkage gear and a second adjusting gear from left to right. A motor is installed outside the wind guide tube, the driving gear is fixedly connected with the output shaft of the motor, the first air distribution plate is fixed with the first adjusting gear, and the second air distribution plate is fixed with the second adjusting gear.

[0007] As a preferred technical scheme of the present application, the winding device comprises a supporting frame fixedly connected with the expansion cover, a rotating rod rotatably installed on the supporting frame, and a winding drum fixedly connected with the outer surface of the rotating rod, and the isolation film is wound on the outer surface of the winding drum.

[0008] As a preferred technical scheme of the present application, a fixed sleeve is fixedly installed on one side wall of the supporting frame and sleeved on the outer surface of the rotating rod, and a coil spring is connected between the rotating rod and the fixed sleeve.

[0009] As a preferred technical scheme of the present application, the lower end of each of the first and second air deflectors is fixedly installed with a base, and two mounting blocks are installed on the two bases and fixedly connected with the isolation film.

[0010] As a preferred technical scheme of the present application, two groups of pulleys are rotatably installed at the position of the first through hole, and the isolation film is arranged between the two groups of pulleys.

[0011] As a preferred technical scheme of the present application, a baffle is slidingly installed between the two air deflectors, an electric cylinder is fixedly installed on the outside of the air duct, and the baffle is fixedly connected with the output rod of the electric cylinder.

[0012] As a preferred technical scheme of the present application, a second through hole is formed in each of the first and second air deflectors.

[0013] As a preferred technical scheme of the present application, the expansion cover has an isosceles trapezoidal structure in cross section.

[0014] Compared with the prior art, the present application has the following advantages:

[0015] The present application is a kind of atomic absorption cover for experimental detection, by setting expansion cover, adjusting mechanism, first air deflector, second air deflector and air deflector in the inside of air duct, can realize the multi-mode selection of gas absorption, according to the actual use demand, in large area suction or channel suction arbitrary switching use, solve the deficiency of traditional fixed type atomic absorption cover, can realize large area suction, prevent harmful gas overflow, also can realize strong suction to small area range, improve the suction effect.

[0016] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the overall structure schematic diagram of the present application;

[0018] Figure 2 It is the overall structure schematic diagram of the present application; Figure 1 the sectional view of A-A in the present application;

[0019] Figure 3 Figure 1 is a schematic view of the structure of the first through hole of the isolation film of the present application when being wound; Figure 1 Figure 2 is a schematic view of the structure of the middle B of the present application;

[0020] Figure 4 Figure 3 is a schematic view of the structure of the first through hole of the isolation film of the present application when being wound;

[0021] Figure 5 Figure 4 is a schematic view of the structure of the side of the winder of the present application;

[0022] Figure 6 Figure 5 is a schematic view of the structure of the top of the winder of the present application;

[0023] Figure 7 Figure 6 is a schematic view of the structure of the coil spring of the present application;

[0024] In the figure: 1, the expansion cover; 11, the first through hole; 12, the pulley; 2, the air duct; 3, the air blower; 31, the gathering cover; 32, the exhaust pipe; 4, the adjusting mechanism; 41, the motor; 42, the driving gear; 43, the first adjusting gear; 44, the linkage gear; 45, the second adjusting gear; 51, the first air baffle; 52, the second air baffle; 53, the base; 54, the mounting block; 55, the second through hole; 56, the magnetic strip; 57, the groove; 58, the clamping piece; 6, the air distribution plate; 71, the baffle; 72, the electric cylinder; 8, the winder; 81, the support frame; 82, the rotating rod; 83, the winding drum; 84, the fixing sleeve; 85, the coil spring; 9, the isolation film. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "vertical", "upper", "lower", "horizontal" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0027] In the description of the present application, it is also necessary to explain that, unless otherwise explicitly specified and limited, the terms "set", "install", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] Please refer to Figures 1-7 In this embodiment, an atomic absorption cover for experimental detection is provided, which comprises an expansion cover 1 and a wind scoop 2 fixedly installed on the upper end of the expansion cover 1, an aggregation cover 31 is installed on the upper end of the wind scoop 2, an air guide fan 3 is fixedly installed on the upper end of the aggregation cover 31, an exhaust pipe 32 is arranged on one side of the air guide fan 3, two air distribution plates 6 are fixedly installed inside the wind scoop 2, an adjusting mechanism 4 is installed on the bottom of the inner wall of the front side of the wind scoop 2, a first air distribution plate 51 and a second air distribution plate 52 are rotatably installed on the lower end of the adjusting mechanism 4, and the first air distribution plate 51 and the second air distribution plate 52 are arranged in the expansion cover 1, a winding device 8 is installed on the outer wall of each side of the expansion cover 1, an isolation film 9 is wound on each of the two winding devices 8, and the ends of the two isolation films 9 away from the winding devices 8 are respectively installed on the bottom of the first air distribution plate 51 and the second air distribution plate 52. By setting the expansion cover 1, the adjusting mechanism 4, the first air distribution plate 51, the second air distribution plate 52 and the air distribution plate 6 arranged inside the wind scoop 2, multi-mode selection during gas absorption can be realized, and according to the actual use requirement, any switching use in large-area gas suction or channel gas suction can be realized, solving the deficiency of the traditional fixed atomic absorption cover, which can realize large-area gas suction to prevent harmful gas overflow, and can also realize strong gas suction in a small area, improving the gas suction effect.

[0029] In this embodiment, the adjusting mechanism 4 comprises an adjusting box, four horizontally arranged gears are rotatably installed in the adjusting box, and the adjacent gears are meshed with each other, the four gears are sequentially the first adjusting gear 43, the driving gear 42, the linkage gear 44 and the second adjusting gear 45 from left to right, the outer portion of the air duct 2 is provided with the motor 41, and the driving gear 42 is fixedly connected with the output shaft of the motor 41, the first air baffle 51 is fixed with the first adjusting gear 43, the second air baffle 52 is fixed with the second adjusting gear 45, the winder 8 comprises a support frame 81 fixedly connected with the expansion cover 1, a rotating rod 82 is rotatably installed on the support frame 81, a winding drum 83 is fixedly connected to the outer surface of the rotating rod 82, the isolation film 9 is wound on the outer surface of the winding drum 83, a fixed sleeve 84 is fixedly installed on one side wall of the support frame 81 and sleeved on the outer surface of the rotating rod 82, a coiled spring 85 is connected between the rotating rod 82 and the fixed sleeve 84, the two isolation films 9 respectively penetrate through the two side walls of the expansion cover 1, and the two side walls of the expansion cover 1 are provided with first through openings 11 corresponding to the positions of the isolation films 9, a plurality of magnetic strips 56 are fixedly installed on one end of the mounting block 54 close to the isolation film 9, the plurality of magnetic strips 56 are combined into a rectangular groove 57, the groove 57 can be used as a containing space for the pulley 12, so that the mounting block 54 is attached to the surface of the expansion cover 1, thereby achieving the plugging of the first through opening 11, preventing the air in the suction cover from flowing out through the first through opening 11 when using the air ducts on the two side edges, the lower ends of the first air baffle 51 and the second air baffle 52 are fixedly installed with the base 53, the two bases 53 are provided with the mounting block 54, and the isolation film 9 is fixedly connected with the mounting block 54, the mounting block 54 is provided with a clamping piece 58, and the base 53 is provided with a clamping groove matched with the clamping piece 58, in use, when large-area air suction is required, the mounting block 54 on the base 53 can be removed, at this time, through the coiled spring 85, the rotating rod 82 and the winding drum 83 can be rotated, thereby winding the isolation film 9, thereby opening the gas passage on both sides of the first air baffle 51 and the second air baffle 52, so that all areas in the expansion cover 1 can perform gas suction work, when small-area air suction is required, the mounting block 54 is installed on the base 53 again, then the isolation film 9 can be used to plug the air distribution passage, thereby realizing air suction in the area between the first air baffle 51 and the second air baffle 52, after the gas passes through the area, it is finally sucked out by the induced draft fan 3 through the two air distribution plates 6, it should be noted that only one mounting block 54 can be installed, that is, only one side air passage is plugged, thereby improving the flexibility of control and use, in order to improve the smoothness of winding the isolation film 9, two groups of pulleys 12 are rotatably installed on the position of the first through opening 11 of the expansion cover 1, and the isolation film 9 is arranged between the two groups of pulleys, the pulley 9 can prevent the isolation film 9 from being scratched when winding.

[0030] In the embodiment, the baffle 71 is slidingly installed between the two air distribution plates 6, the electric cylinder 72 is fixedly installed outside the air duct 2, the baffle 71 is fixedly connected with the output rod of the electric cylinder 72, the second through hole 55 is formed in each of the first air baffle 51 and the second air baffle 52, and when only one side channel or two side channels are needed to work to absorb gas, the electric cylinder 72 can be started to drive the baffle 71 to horizontally move, so that the area between the two air distribution plates 6 can be blocked, and the single side channel or two side channels working to absorb gas mode can be switched. When the middle channel between the side channels or the first air baffle 51 and the second air baffle 52 is used, in order to prevent the gas from overflowing due to the small area of the gas suction end, the second through hole 55 is arranged to temporarily collect the gas in the channel not in work and transfer the gas to the adjacent working gas channel through the second through hole 55, so that the problem of the small area absorption cover easily causing gas overflow is effectively solved. For example, when the electric cylinder 72 drives the baffle 71 to close, the atomic absorption cover is changed to use the single side channel to work to absorb, and after the gas below is absorbed through the left side channel of the first air baffle 51 or the right side channel of the second air baffle 52, the single side channel gas suction end is too small, so the gas below is easy to overflow into the middle channel between the first air baffle 51 and the second air baffle 52. At this time, the overflow gas is transferred to the adjacent single side channel in work through the second through hole 55, so that the problem of the small area absorption cover easily causing gas overflow is effectively solved.

[0031] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An atomic absorption cover for experimental detection, characterized in that: The invention comprises an expansion hood (1) and an air guide tube (2) fixedly mounted on the upper end of the expansion hood (1), a gathering hood (31) being mounted on the upper end of the air guide tube (2), an induced draft fan (3) being fixedly mounted on the upper end of the gathering hood (31), an exhaust pipe (32) being arranged on one side of the induced draft fan (3), two air distribution plates (6) being fixedly mounted inside the air guide tube (2), and an adjustment mechanism (4) being mounted at the bottom of the front inner wall of the air guide tube (2), a first air guide plate (51) and a second air guide plate (52) being rotatably mounted on the lower end of the adjustment mechanism (4), and the first air guide plate (51) and the second air guide plate (52) being both arranged in the expansion hood (1), a reel (8) being mounted on both outer walls of the expansion hood (1), an isolation film (9) being wound around the two reels (8), and the ends of the two isolation films (9) away from the reel (8) being mounted on the bottom of the first air guide plate (51) and the second air guide plate (52) respectively; A baffle (71) is slidably mounted between the two air distribution plates (6), an electric cylinder (72) is fixedly mounted on the outside of the air guide cylinder (2), and the baffle (71) is fixedly connected to an output rod of the electric cylinder (72); A second opening (55) is provided on each of the first air guide plate (51) and the second air guide plate (52).

2. The atomic absorption cover for experimental detection according to claim 1, characterized in that: The regulating mechanism (4) includes a regulating box, in which four horizontally arranged gears are rotatably mounted, and adjacent gears are meshed with each other. The four gears are, from left to right, a first regulating gear (43), a driving gear (42), a linkage gear (44), and a second regulating gear (45). A motor (41) is mounted on the outside of the air guide tube (2), and the driving gear (42) is fixedly connected to the output shaft of the motor (41). The first air guide plate (51) is fixed to the first regulating gear (43), and the second air guide plate (52) is fixed to the second regulating gear (45).

3. The atomic absorption cover for experimental detection according to claim 1, characterized in that: The reel (8) comprises a support frame (81) fixedly connected to the expansion cover (1), a rotating rod (82) is rotatably mounted on the support frame (81), a reel (83) is fixedly connected to the outer surface of the reel (83), and the isolation film (9) is wound around the outer surface of the reel (83).

4. The atomic absorption cover for experimental detection according to claim 3, characterized in that: A fixing sleeve (84) is fixedly mounted on one side wall of the support frame (81), and the fixing sleeve (84) is sleeved on the outer surface of the rotating rod (82). A coil spring (85) is connected between the rotating rod (82) and the fixing sleeve (84).

5. The atomic absorption cover for experimental detection according to claim 1, characterized in that: Bases (53) are fixedly mounted on the lower ends of the first air guide plate (51) and the second air guide plate (52), mounting blocks (54) are mounted on the two bases (53), and the isolation membrane (9) is fixedly connected to the mounting blocks (54).

6. The atomic absorption cover for experimental detection according to claim 1, characterized in that: The two isolation membranes (9) respectively penetrate the two side walls of the expansion cover (1), and the two side walls of the expansion cover (1) are both provided with first openings (11) at positions corresponding to the isolation membranes (9).

7. The atomic absorption cover for experimental detection according to claim 6, characterized in that: The expansion cover (1) is rotatably mounted with two sets of pulleys (12) at the position of the first opening (11), and an isolation membrane (9) is arranged between the two sets of pulleys.

8. The atomic absorption cover for experimental detection according to claim 1, characterized in that: The cross section of the expansion hood (1) is an isosceles trapezoidal structure.

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