CN220361784U

CN220361784U - Laboratory fume chamber exhaust device

Info

Publication number: CN220361784U
Application number: CN202321935728.4U
Authority: CN
Inventors: 常翠莉; 刘府
Original assignee: Taian Bowei Science And Education Equipment Co ltd
Current assignee: Taian Bowei Science And Education Equipment Co ltd
Priority date: 2023-07-21
Filing date: 2023-07-21
Publication date: 2024-01-19
Anticipated expiration: 2033-07-21

Abstract

The utility model provides a laboratory fume chamber exhaust device, includes exhaust hood, main fan and focus exhaust module, the lower extreme fixed connection of exhaust hood is in the upside surface of fume chamber cabinet body, and the upper end passes through main fan and is connected with air pipe, the exhaust hood includes inner cover and dustcoat, form the wind-guiding chamber between inner cover and the dustcoat, the inner cover surface is provided with a plurality of ventilation holes, focus exhaust module sets up the inboard top of inner cover, focus wind module includes connecting pipe and focus suction head, the connecting pipe adopts ripple flexible pipe, and its one end passes inner cover and wind-guiding chamber intercommunication, and the other end is connected with focus suction head, focus suction head includes focus hood and focus fan, focus fan sets up in focus hood, and the one end that its opening size is little is connected with the connecting pipe, and the one end that the opening size is big is towards cabinet body surface arrangement, focus suction head can be targeted absorbs the smog that experimental operation position produced, makes smog pollutant in time discharge.

Description

Laboratory fume chamber exhaust device

Technical Field

The utility model relates to the field of laboratory equipment manufacturing, in particular to an exhaust device of a laboratory fume hood.

Background

Fume chamber is the experimental apparatus that often uses in a laboratory, and when experimenter carried out the experiment in the fume chamber, the fume pollution thing that concentrated in the experimentation generated can be absorbed by fume chamber's exhaust device, in the exhaust duct who is connected with exhaust device, avoids fume pollution thing to be inhaled by the experimenter in the fume chamber, leads to experimenter poisoning.

The structure and the principle of the exhaust device of the fume hood on the current market are similar to those of a household fume extractor, and smoke pollutants generated by experiments are pumped away through a fixed exhaust outlet arranged in the fume hood. However, if the fume chamber is arranged at the experimental operation position in the fume chamber, a large amount of fume pollutants are generated in an explosive manner, and under such a condition, the fume chamber fixedly arranged at the air outlet cannot absorb the fume generated at the experimental operation position in a targeted manner, so that a large amount of fume pollutants cannot be discharged in time, and workers working in the fume chamber may inhale the fume pollutants which are not discharged in time, so that the health of the workers is damaged.

Disclosure of Invention

In order to solve the problems, the utility model provides an exhaust device of a laboratory fume hood.

The technical scheme of the utility model is as follows:

the utility model provides a laboratory fume chamber exhaust device, exhaust device sets up in the top of fume chamber cabinet body, and communicates with the air pipe, can be with the fume pollutant of experiment production in the air pipe is discharged into, exhaust device includes exhaust hood, main fan and focus exhaust module, the lower extreme fixed connection of exhaust hood is at the upside surface of fume chamber cabinet body, and the upper end passes through main fan and is connected with the air pipe, the exhaust hood includes inner cover and dustcoat, the inner cover sets up inside the dustcoat, form the wind-guiding chamber between inner cover and the dustcoat, wind-guiding chamber upper end is through main fan and air pipe intercommunication, the inner cover surface is provided with a plurality of ventilation holes, focus exhaust module sets up the top of inner cover inboard, focus wind module includes connecting pipe and focus suction head, the connecting pipe adopts ripple flexible pipe, and its one end passes the inner cover and leads wind-guiding chamber intercommunication, and the other end is connected with focus suction head, focus suction head includes focus hood and focus fan, focus fan sets up in the focus hood, can provide for the suction head, the shape of focus hood includes that main fan and ventilation hood's size is connected with the large-scale fume chamber size to the one end that the experiment size of the pollutant of the face of the large-scale fume chamber is located, the size of the face of the large-scale fume chamber is arranged.

The exhaust device of the laboratory fume hood is characterized in that the mounting groove is formed in the position, connected with the connecting pipe, of the inner hood, the mounting groove sequentially comprises a pipeline section and a hood section from top to bottom, the diameter of the pipeline section is matched with the shape of the connecting pipe, the shape of the hood section is matched with the shape of the focusing hood, the focusing suction head is placed in the mounting groove, and the projecting focusing suction head can be prevented from interfering with experiments by experimenters.

Further, the both sides of focusing cover are provided with the fixed knot that the symmetry set up constructs, fixed knot constructs including fixed reed and grasp handle, fixed reed upper end and the lower extreme edge fixed connection of focusing cover, lower extreme and grasp handle fixed connection, fixed reed is provided with bellied locating piece towards mounting groove inner wall one side, the mounting groove inner wall is provided with the constant head tank in the relative position of locating piece, the shape of constant head tank cooperatees with the shape of locating piece, works as during the focusing suction head contracts into the mounting groove, the locating piece can block into corresponding constant head tank, makes the focusing suction head can be fixed in the mounting groove.

Preferably, the shape of the positioning block comprises a hemispherical shape, and the maximum height of the protrusion of the positioning block is not less than 1cm, so that the focusing attraction head can be stably fixed in the mounting groove.

Preferably, the focusing cover is made of a transparent acrylic plate, and the transparent design of the focusing cover can avoid shielding the sight of experimenters.

Further, the shape of the grip handle comprises a rectangular ring shape, the upper end of the grip handle is fixedly connected with the fixed reed, the lower end of the grip handle is wrapped with a rubber sleeve, and the rubber sleeve can increase friction force between hands of experimenters and the grip handle.

Further, the focusing fan is arranged at the joint of the focusing cover and the connecting pipe, a protective gauze is arranged on one side of the focusing fan, which faces the focusing cover, the focusing fan can provide additional suction force for the focusing suction head, so that smoke pollutants generated in the experiment can be timely discharged into the exhaust pipeline through the focusing suction head, and sundries can be prevented from being sucked into the exhaust pipeline by the focusing suction head by the protective gauze.

Preferably, the main fan is a centrifugal fan.

Preferably, the vent holes are also covered with a protective gauze, and the protective gauze can prevent sundries from entering the air guide cavity from the vent holes.

Further, the vent hole is provided with the non-return board towards one side of wind-guiding chamber, the area of non-return board is not less than the diameter of vent hole, the upper end of non-return board rotates with the surface of inner cover and is connected, avoids focusing the focus to inhale the focus fan of head and starts the back flow of smog pollutant through the vent hole in the fume chamber.

Compared with the prior art, the utility model has the following beneficial effects:

according to the exhaust device of the laboratory fume hood, the focusing suction head of the exhaust device can be taken down from the mounting groove and arranged above the experimental operation position, so that a large amount of smoke pollutants generated at the experimental operation position can be sucked in time in a short distance, the situation that a large amount of smoke pollutants stay in the exhaust hood and cannot be discharged out of the fume hood in time is effectively avoided, and the problem that an experimenter sucks the smoke pollutants in the fume hood to cause poisoning injury is solved.

Drawings

The aspects and advantages of the present application will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model.

In the drawings:

FIG. 1 is a schematic diagram of a laboratory fume hood to which the exhaust device is applied;

FIG. 2 is a top view of the disclosed exhaust device;

FIG. 3 is a schematic view of the installation structure of the focusing and absorbing head in the installation groove;

FIG. 4 is a side view of the focus pull head of the present disclosure;

FIG. 5 is a partial detail view of the vent of the present disclosure;

1. a cabinet body; 2. a ventilation duct; 3. an exhaust hood; 31. an inner cover; 32. an outer cover; 33. a mounting groove; 34. a pipe section; 35. a cover section; 36. a positioning groove; 37. a non-return plate; 38. a vent hole; 39. an air guide cavity; 4. a main fan; 5. a focusing exhaust module; 51. a focus cover; 52. a focusing fan; 53. a fixed structure; 54. fixing the reed; 55. gripping the handle; 56. a positioning block; 57. a rubber sleeve; 58. and (5) connecting pipes.

Detailed Description

Referring to fig. 1-5, a laboratory fume hood exhaust device is arranged above a fume hood cabinet body 1 and is communicated with a fume duct 2, so that fume pollutants generated by experiments can be discharged into the fume duct 2, the exhaust device comprises an exhaust hood 3, a main fan 4 and a focusing exhaust module 5, the lower end of the exhaust hood 3 is fixedly connected to the upper side surface of the fume hood cabinet body 1, the upper end of the exhaust hood 3 is connected with the fume duct 2 through the main fan 4, the exhaust hood 3 comprises an inner hood 31 and an outer hood 32, the inner hood 31 is arranged inside the outer hood 32, an air guide cavity 39 is formed between the inner hood 31 and the outer hood 32, the upper end of the air guide cavity 39 is communicated with the fume duct 2 through the main fan 4, a plurality of ventilation holes 38 are formed in the surface of the inner hood 31, when the main fan 4 is electrified and rotated, suction force can be provided, the smoke pollutant in the exhaust hood 3 can be sucked into the air guide cavity 39 from the vent hole 38 and then discharged into the ventilation pipeline 2, so as to avoid poisoning caused by the suction of the smoke pollutant by an experimenter who experiments in the exhaust hood 3 of the ventilation hood, the focusing exhaust module 5 is arranged at the top of the inner side of the inner hood 31 and comprises a connecting pipe 58 and a focusing suction head, the connecting pipe 58 adopts a corrugated telescopic pipe, one end of the connecting pipe passes through the inner hood 31 and is communicated with the air guide cavity 39, the other end of the connecting pipe is connected with the focusing suction head, the focusing suction head comprises a focusing hood 51 and a focusing fan 52, the focusing fan 52 is arranged in the focusing hood 51 and can provide suction force for the focusing suction head, the shape of the focusing hood 51 comprises a horn shape, one end of the small opening size of the focusing hood is connected with the connecting pipe 58, one end of the large opening size of the focusing hood is arranged towards the surface of the cabinet body 1, when experiments are carried out on the surface of the cabinet body 1 and a large amount of smoke pollutants can be generated in the experiments in advance, the focusing suction head can be pulled to the upper part of the experimental operation position and connected with the power supply of the focusing fan 52, and the focusing suction head is utilized to carry out targeted adsorption on a large amount of smoke pollutants generated in the experimental operation position in a short distance, so that the problem that a large amount of smoke pollutants are not discharged from the exhaust hood 3 in time, and the toxicity of experimental personnel is caused is avoided.

Referring to fig. 2 and 3, the inner cover 31 is provided with a mounting groove 33 at a position connected with the connecting pipe 58, the mounting groove 33 sequentially comprises a pipeline section 34 and a cover body section 35 from top to bottom, the diameter of the pipeline section 34 is matched with the shape of the connecting pipe 58, the connecting pipe 58 can be accommodated in the mounting groove, the shape of the cover body section 35 is matched with the shape of the focusing cover 51, the focusing cover 51 can be accommodated in the mounting groove, and when experiments performed in the ventilation cabinet do not generate a large amount of smoke pollutants, the focusing suction head can be placed in the mounting groove 33, so that the extended focusing suction head is prevented from interfering with experiments performed by experimenters.

Further, referring to fig. 4, two sides of the focusing cover 51 are provided with symmetrically arranged fixing structures 53, the fixing structures 53 include fixing reeds 54 and grip handles 55, the upper ends of the fixing reeds 54 are fixedly connected with the edges of the lower ends of the focusing cover 51, the lower ends of the fixing reeds are fixedly connected with the grip handles 55, one side, facing the inner wall of the mounting groove 33, of the fixing reeds 54 is provided with a raised positioning block 56, the inner wall of the mounting groove 33 is provided with a positioning groove 36 at the opposite position of the positioning block 56, the shape of the positioning groove 36 is matched with that of the positioning block 56, when the focusing attraction head is retracted into the mounting groove 33, the positioning block 56 can be clamped into the corresponding positioning groove 36, so that the focusing attraction head can be fixed in the mounting groove 33, when the focusing attraction head needs to be taken out of the mounting groove 33, an experimenter can respectively grasp the corresponding grip handles 55 and press the fixing reeds 54 inwards, so that the positioning block 56 can be taken out of the positioning groove 36, and the focusing attraction head can be taken out of the mounting groove 33.

Preferably, the shape of the positioning block 56 includes a hemispherical shape, so that the positioning block 56 can slide into the positioning groove 36 smoothly or slide out of the positioning groove 36, and the maximum height of the protrusion of the positioning block 56 is not less than 1cm, so that the focusing and sucking head can be stably fixed in the mounting groove 33 after the positioning block 56 slides into the positioning groove 36, and the focusing and sucking head is prevented from falling out of the mounting groove 33.

Preferably, the focusing cover 51 is made of a transparent acrylic plate, and the transparent design can avoid shielding the vision of the experimenter, so that the experimenter can see the experimental condition through the focusing cover 51.

Further, the shape of the grip handle 55 comprises a rectangular ring shape, the upper end of the grip handle is fixedly connected with the fixed reed 54, the lower end of the grip handle is wrapped with the rubber sleeve 57, the rubber sleeve 57 can increase friction force between the hands of an experimenter and the grip handle 55, and the experimenter is prevented from sliding off from the hands of the experimenter when operating the focusing attraction head.

Further, the focusing fan 52 is disposed at the connection between the focusing cover 51 and the connecting pipe 58, and a protective screen is disposed on one side of the focusing cover 51, where the focusing fan 52 can provide additional suction force for the focusing suction head, so that smoke pollutants generated in the experiment can be timely discharged into the exhaust duct through the focusing suction head, and the protective screen can prevent impurities from being sucked into the ventilation duct 2 by the focusing suction head, and prevent a tester from accidentally touching the fan blades of the focusing fan 52 and being damaged by the rotating fan blades.

Preferably, the main fan 4 is a centrifugal fan, the main fan 4 adopting the centrifugal fan is smaller in volume, and can output larger air quantity under the condition of occupying smaller space, so that the suction force on smoke pollutants in the fume hood is increased, and the smoke pollutants in the fume hood can be discharged more timely.

Preferably, the ventilation holes 38 are also covered with a protective screen, which can prevent sundries from entering the wind guiding cavity 39 from the ventilation holes 38, so that the main fan 4 is damaged by the sundries.

Further, referring to fig. 5, a non-return plate 37 is disposed on a side of the vent hole 38 facing the air guiding cavity 39, an area of the non-return plate 37 is not smaller than a diameter of the vent hole 38, an upper end of the non-return plate 37 is rotatably connected with a surface of the inner cover 31, when the main fan 4 is started, the generated suction force can enable the non-return plate 37 to be rotatably opened on a side of the vent hole 39, otherwise, the non-return plate 37 is in a closed state, and after the focusing fan 52 of the focusing suction head is started, smoke pollutants can be prevented from flowing back into the fume chamber through the vent hole 38.

Claims

1. The utility model provides a laboratory fume chamber exhaust device, exhaust device sets up in the top of fume chamber cabinet body (1), and communicates with air pipe (2), its characterized in that, exhaust device includes exhaust hood (3), main fan (4) and focus exhaust module (5), the lower extreme fixed connection of exhaust hood (3) is at the upside surface of fume chamber cabinet body (1), and the upper end is connected with air pipe (2) through main fan (4), exhaust hood (3) include inner cover (31) and dustcoat (32), inner cover (31) set up in dustcoat (32) inside, form wind guiding chamber (39) between inner cover (31) and dustcoat (32), wind guiding chamber (39) upper end is through main fan (4) and air pipe (2) intercommunication, inner cover (31) surface is provided with a plurality of ventilation holes (38), focus module (5) set up the top at inner side of inner cover (31), focus module includes connecting pipe (58) and focus suction head, suction head (58) adopt and focus bellows (51) to draw in that inner cover (31) and focus fan (52) are connected at focus end and focus head (52), the shape of the focusing cover (51) comprises a horn shape, one end with a small opening size is connected with the connecting pipe (58), and the other end with a large opening size is arranged towards the surface of the cabinet body (1).

2. A laboratory fume hood exhaust device according to claim 1, characterized in that said inner hood (31) is provided with a mounting groove (33) at the location of connection with the connection pipe (58), said mounting groove (33) comprising in sequence from top to bottom a pipe section (34) and a hood section (35), the diameter of said pipe section (34) being adapted to the shape of the connection pipe (58), the shape of said hood section (35) being adapted to the shape of the focusing hood (51).

3. The laboratory fume chamber exhaust device according to claim 2, wherein the two sides of the focusing cover (51) are provided with symmetrically arranged fixing structures (53), the fixing structures (53) comprise fixing reeds (54) and a grip handle (55), the upper ends of the fixing reeds (54) are fixedly connected with the edges of the lower ends of the focusing cover (51), the lower ends of the fixing reeds are fixedly connected with the grip handle (55), a raised positioning block (56) is arranged on one side of the fixing reeds (54) facing the inner wall of the mounting groove (33), positioning grooves (36) are arranged on the inner wall of the mounting groove (33) at the opposite positions of the positioning block (56), and the shapes of the positioning grooves (36) are matched with the shapes of the positioning blocks (56).

4. A laboratory fume hood exhaust device according to claim 3, characterized in that the shape of said positioning block (56) comprises a hemispherical shape, the maximum height of the protrusion of said positioning block (56) being not less than 1cm.

5. A laboratory fume hood exhaust device according to claim 1, wherein said focusing hood (51) is made of transparent acrylic sheet.

6. A laboratory fume hood exhaust device according to claim 3, characterized in that said grip handle (55) has a rectangular ring shape with an upper end fixedly connected to the fixed reed (54) and a lower end wrapped with a rubber sleeve (57).

7. A laboratory fume hood exhaust device according to claim 1, characterized in that the focusing fan (52) is arranged at the junction of the focusing hood (51) and the connecting pipe (58), and that the side facing the focusing hood (51) is provided with a protective screen.

8. A laboratory fume hood exhaust device according to claim 1, characterized in that said main fan (4) is a centrifugal fan.

9. A laboratory fume hood exhaust device according to claim 1, characterized in that said ventilation holes (38) are also covered with protective gauze.

10. A laboratory fume hood exhaust device according to claim 9, characterized in that said vent hole (38) is provided with a non-return plate (37) on the side facing the air guiding cavity (39), the area of said non-return plate (37) is not smaller than the diameter of the vent hole (38), the upper end of said non-return plate (37) is rotatably connected with the surface of the inner cover (31).