Novel laboratory fume hood

Abstract

The utility model discloses a novel laboratory fume hood which comprises a hood body, two electric telescopic rods are installed on the inner top of the hood body, the telescopic ends of the two electric telescopic rods are jointly and fixedly connected with an air exhaust hood, and a fan is installed at the upper end of the hood body. The air inlet end of the fan is fixedly connected with the inner top of an air exhaust cover through an air inlet pipe, a first threaded rod is rotatably connected to the inner wall of one side of the cabinet body, a first brush is in threaded connection to the first threaded rod, a plurality of supporting legs are fixedly connected to the upper end of the cabinet body, and a purification box is jointly and fixedly connected to the upper ends of the supporting legs; and the air outlet end of the fan communicates with the interior of the purification box, and the inner walls of the two sides of the purification box are fixedly connected with fixing plates. And structures such as a first threaded rod, a second threaded rod and a motor are arranged, and under the cooperation of a transmission mechanism, a second brush can be moved to clean a filter screen while a first brush is moved to clean the cabinet body.

Description

Technical Field

[0001] The utility model relates to the technical field of laboratory fume hoods, in particular to a novel laboratory fume hood. Background Art

[0002] Fume hoods are used for exhaust and ventilation in laboratories. Various harmful and toxic gases as well as some volatile and highly corrosive substances will be generated during experimental operations. In order to protect the safety of experimental operators, prevent the toxic gases and volatile substances generated in the experiment from spreading into the laboratory, and avoid endangering the health of experimental operators, some chemical experiments must be carried out in fume hoods.

[0003] However, after long-term use, impurities are easily attached to the surface of the filter screen that filters the gas. If not cleaned in time, these impurities will clog the mesh of the filter screen, affecting the subsequent gas purification effect. In addition, when the filter screen needs to be replaced, the operation is cumbersome and difficult to install and disassemble quickly. Therefore, how to solve this problem is what the technicians in this industry need to consider. Utility Model Content

[0004] The utility model aims to solve the shortcomings of the prior art and proposes a novel laboratory fume hood, which is provided with a first threaded rod, a second threaded rod and a motor and other structures. With the cooperation of a transmission mechanism, the first brush can be moved to clean the cabinet body and the second brush can be moved to clean the filter screen.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A novel laboratory fume hood comprises a cabinet body, wherein two electric telescopic rods are installed on the inner top of the cabinet body, and the telescopic ends of the two electric telescopic rods are fixedly connected to an exhaust hood together, and a fan is installed on the upper end of the cabinet body, and the air inlet end of the fan is fixedly connected to the inner top of the exhaust hood through an air inlet pipe, a first threaded rod is rotatably connected to an inner wall of one side of the cabinet body, and a first brush is threadedly connected to the first threaded rod, a plurality of supporting legs are fixedly connected to the upper end of the cabinet body, and a purification box is fixedly connected to the upper ends of the plurality of supporting legs together, and the air outlet end of the fan is connected to the inside of the purification box, the inner walls on both sides of the purification box are fixedly connected to fixed plates, and a filter is placed on the upper ends of the two fixed plates together, and a second threaded rod is rotatably connected to an inner wall of one side of the purification box, and a second brush is threadedly connected to the second threaded rod.

[0007] Preferably, a motor is installed on the outer side wall of the cabinet, and the output shaft end of the motor extends into the interior of the cabinet and is fixedly connected to one end of the first threaded rod.

[0008] Preferably, one end of the second threaded rod penetrates through the purification box and extends to the outside, and the end of the second threaded rod located outside is in transmission connection with the output shaft of the motor through a transmission mechanism.

[0009] Preferably, the transmission mechanism includes two belt pulleys, the two belt pulleys are respectively installed on the end of the second threaded rod located outside and the output shaft of the motor, and the two belt pulleys are in transmission connection through a belt.

[0010] Preferably, two guide rods are fixedly connected to the inner top of the purification box, racks are arranged on both guide rods, rotating shafts are rotatably connected to both inner side walls of the purification box, gears are installed on both rotating shafts, and both gears are engaged with the corresponding racks.

[0011] Preferably, one end of each of the two rotating shafts penetrates through the purification box and extends to the outside, and knobs are fixedly connected to the ends of the two rotating shafts located outside.

[0012] Preferably, clamping plates are fixedly connected to the side walls of both racks, and rubber layers are arranged at the lower ends of both clamping plates.

[0013] Preferably, an air outlet pipe is communicated with the inner top of the purification box, and a sealing door is arranged on one side of the purification box.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. Structures such as the first threaded rod, the second threaded rod and the motor are arranged, so that the first brush moves to clean the residual materials in the cabinet body, and with the cooperation of the transmission mechanism, the second brush can also move to clean the filter screen, avoiding the blockage of the mesh holes of the filter screen by impurities and affecting the subsequent gas purification effect;

[0016] 2. Structures such as guide rods, racks and gears are arranged. Rotating the gears makes the racks move, and then makes the clamping plates move. The two sides of the filter screen can be clamped and limited by the cooperation of the clamping plates and the fixing plates. In this way, the installation and removal of the filter screen are convenient and simple, and it is convenient to replace the filter screen. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of a novel laboratory fume hood proposed by the present utility model;

[0018] Figure 2 is Figure 1 the front sectional view of

[0019] Figure 3 is Figure 1 the right sectional view of

[0020] Figure 4For Figure 3 An enlarged view of part A of

[0021] Figure 5 For Figure 1 A rear schematic view of

[0022] In the figure: 1 cabinet body, 2 electric telescopic rods, 3 air extraction hood, 4 fan, 5 intake pipe, 6 first threaded rod, 7 first brush, 8 support legs, 9 purification box, 10 fixing plate, 11 filter screen, 12 second threaded rod, 13 second brush, 14 motor, 15 transmission mechanism, 16 guide rod, 17 rack, 18 rotating shaft, 19 gear, 20 knob, 21 clamping plate, 22 outlet pipe, 23 sealing door. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0024] Referring to Figures 1-5 , a new type of laboratory fume hood includes a cabinet body 1. Two electric telescopic rods 2 are installed on the inner top of the cabinet body 1. The telescopic ends of the two electric telescopic rods 2 are fixedly connected to an air extraction hood 3. By starting the two electric telescopic rods 2, the air extraction hood 3 can move up and down, and thus, according to the specific conditions of different experiments, the air extraction height of the air extraction hood 3 can be adjusted to make it closer to the experimental items, achieving a better ventilation effect.

[0025] A fan 4 is installed at the upper end of the cabinet body 1. The air inlet end of the fan 4 is fixedly connected to the inner top of the air extraction hood 3 through an intake pipe 5. The intake pipe 5 is a flexible pipe. One inner wall of the cabinet body 1 is rotatably connected to a first threaded rod 6. A first brush 7 is threadedly connected to the first threaded rod 6. Since some materials are toxic and harmful substances, by moving the first brush 7 back and forth, the residual materials in the cabinet body 1 can be cleaned, which can avoid harm to the staff and save time and effort.

[0026] Among them, a plurality of support legs 8 are fixedly connected to the upper end of the cabinet body 1. The upper ends of the plurality of support legs 8 are fixedly connected to a purification box 9 together. The air outlet end of the fan 4 is communicated with the inside of the purification box 9. Fixing plates 10 are fixedly connected to both inner walls of the purification box 9. A filter screen 11 is placed on the upper ends of the two fixing plates 10 together.

[0027] One inner wall of the purification box 9 is rotatably connected to a second threaded rod 12. A second brush 13 is threadedly connected to the second threaded rod 12. By moving the second brush 13 back and forth, the filter screen 11 can be cleaned to prevent impurities in the gas from adhering to the filter screen 11 and affecting the subsequent gas purification effect.

[0028] A motor 14 is installed on the outer side wall of the cabinet body 1. The motor 14 is a servo motor. The end of the output shaft of the motor 14 extends into the cabinet body 1 and is fixedly connected to one end of the first threaded rod 6. One end of the second threaded rod 12 penetrates through the purification box 9 and extends to the outside. The end of the second threaded rod 12 located outside is in transmission connection with the output shaft of the motor 14 through a transmission mechanism 15. The transmission mechanism 15 includes two belt pulleys. The two belt pulleys are respectively installed on the end of the second threaded rod 12 located outside and the output shaft of the motor 14. The two belt pulleys are connected by a belt.

[0029] Wherein, two guide rods 16 are fixedly connected to the inner top of the purification box 9. Rack bars 17 are arranged on both of the two guide rods 16. The two rack bars 17 can slide on the corresponding guide rods 16. Both inner side walls of the purification box 9 are rotatably connected with rotating shafts 18. Gears 19 are installed on both of the two rotating shafts 18. The two gears 19 are both engaged with the corresponding rack bars 17. One end of both of the two rotating shafts 18 penetrates through the purification box 9 and extends to the outside.

[0030] Knobs 20 are fixedly connected to the ends of both of the two rotating shafts 18 located outside. Clamping plates 21 are fixedly connected to the side walls of the two rack bars 17. Rubber layers are arranged at the lower ends of the two clamping plates 21. By moving the rack bars 17 up and down, the clamping plates 21 can be moved up and down. By cooperating the clamping plates 21 with the fixing plate 10, the two sides of the filter screen 11 can be clamped and limited.

[0031] In this way, the removal and installation of the filter screen 11 are convenient and simple, facilitating the replacement of the filter screen 11. An air outlet pipe 22 communicates with the inner top of the purification box 9. A sealing door 23 is arranged on one side of the purification box 9. One side of the sealing door 23 is rotatably connected to the purification box 9, and the other side is connected to the purification box 9 by means of snap connection.

[0032] When the utility model is in use, the fan 4 is started to make the air extraction hood 3 generate suction to extract the gas generated by the experiment. Then, the gas is sent into the purification box 9 through the air inlet pipe 5. When extracting, according to the specific conditions of different experiments, the two electric telescopic rods 2 can be started to move the air extraction hood 3 up and down, so as to be able to adjust the air extraction height of the air extraction hood 3 and make it closer to the experimental articles, achieving a better ventilation effect. When the gas enters the purification box 9, it will be purified by the filter screen 11 and finally discharged to the outside through the air outlet pipe 22.

[0033] After the experiment is over, the motor 14 can be started. After the motor 14 starts, it will drive the first threaded rod 6 to rotate, thereby causing the first brush 7 to move to clean the inside of the cabinet 1, avoiding harm to the staff caused by residual toxic substances. During this process, through the transmission of the transmission mechanism 15, the second threaded rod 12 will also rotate, thereby causing the second brush 13 to move along with it to clean the surface of the filter screen 11, avoiding the impurities adhered to the filter screen 11 from affecting the filtering effect of the filter screen 11.

[0034] In addition, when the filter screen 11 needs to be replaced, the sealing door 23 can be opened, and then the two knobs 20 are rotated respectively, causing the two rotating shafts 18 to rotate, thereby causing the two gears 19 to rotate. The rotation of the two gears 19 will cause the corresponding racks 17 engaged with them to move upward, thereby causing the two clamping plates 21 to move upward. At this time, the filter screen 11 is released from the limit, and the filter screen 11 can be horizontally withdrawn. Then, the new filter screen 11 is placed on the two fixing plates 10, and the two knobs 20 are rotated in the reverse direction, causing the two racks 17 to drive the two clamping plates 21 back to their original positions to clamp and limit the new filter screen 11. In this way, the removal and installation of the filter screen 11 are convenient and simple, facilitating the replacement of the filter screen 11.

[0035] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent replacements or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A new type of laboratory fume hood, characterized in that: It includes a cabinet body (1). Two electric telescopic rods (2) are installed on the inner top of the cabinet body (1). The telescopic ends of the two electric telescopic rods (2) are fixedly connected to an air extraction hood (3) together. A blower (4) is installed at the upper end of the cabinet body (1). The air inlet end of the blower (4) is fixedly connected to the inner top of the air extraction hood (3) through an air inlet pipe (5). One side inner wall of the cabinet body (1) is rotatably connected to a first threaded rod (6), and a first brush (7) is threadedly connected to the first threaded rod (6); The upper end of the cabinet body (1) is fixedly connected with a plurality of support legs (8). The upper ends of the plurality of support legs (8) are fixedly connected to a purification box (9) together. The air outlet end of the blower (4) is communicated with the inside of the purification box (9). Filter plates (10) are fixedly connected to both side inner walls of the purification box (9). A filter screen (11) is placed on the upper ends of the two filter plates (10) together. One side inner wall of the purification box (9) is rotatably connected to a second threaded rod (12), and a second brush (13) is threadedly connected to the second threaded rod (12).

2. The novel laboratory fume hood according to claim 1, characterized in that: A motor (14) is installed on the outer side wall of the cabinet body (1). The end of the output shaft of the motor (14) extends into the cabinet body (1) and is fixedly connected to one end of the first threaded rod (6).

3. A novel laboratory fume hood according to claim 2, characterized in that: One end of the second threaded rod (12) penetrates through the purification box (9) and extends to the outside. The end of the second threaded rod (12) located outside is in transmission connection with the output shaft of the motor (14) through a transmission mechanism (15).

4. A novel laboratory fume hood according to claim 3, characterized in that: The transmission mechanism (15) includes two belt pulleys. The two belt pulleys are respectively installed on the end of the second threaded rod (12) located outside and the output shaft of the motor (14). The two belt pulleys are connected by a belt in transmission.

5. A novel laboratory fume hood according to claim 1, characterized in that: Two guide rods (16) are fixedly connected to the inner top of the purification box (9). Rack teeth (17) are arranged on both of the two guide rods (16). Rotating shafts (18) are rotatably connected to both side inner walls of the purification box (9). Gears (19) are installed on both of the two rotating shafts (18). Both of the two gears (19) are engaged with the corresponding rack teeth (17).

6. The novel laboratory fume hood according to claim 5, wherein: One end of both of the two rotating shafts (18) penetrates through the purification box (9) and extends to the outside. Knobs (20) are fixedly connected to the ends of the two rotating shafts (18) located outside.

7. A novel laboratory fume hood according to claim 5, characterized in that: Clamping plates (21) are fixedly connected to the side walls of both of the two rack teeth (17). Rubber layers are arranged at the lower ends of the two clamping plates (21).

8. A novel laboratory fume hood according to claim 1, characterized in that: An air outlet pipe (22) is communicated with the inner top of the purification box (9). A sealing door (23) is arranged on one side of the purification box (9).

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