Top hood of ventilation cabinet

Abstract

The utility model discloses a fume hood top cover which comprises a fume hood body and a top cover body, an air adjusting mechanism and a cleaning mechanism are arranged on the inner wall of the top cover body, an air outlet is formed in the top of the top cover body, the air adjusting mechanism comprises an air baffle, a lead screw and a motor, and a sliding groove is formed in the side face of the top cover body. The wind shield is inserted into the sliding groove to be in sliding connection with the top cover body, lug plates are arranged on the side wall of the wind shield, screw holes are formed in the lug plates, the lead screw is inserted into the screw holes to be in threaded connection with the lug plates, the two ends of the lead screw are rotationally connected with the top cover body, and the motor is in key connection with the lead screw. The air regulating mechanism is arranged in the top cover main body, so that the problems that a sample is sucked away by overlarge air volume, the accuracy of experimental data is influenced, harmful substances cannot be effectively eliminated due to oversmall air volume are avoided, and continuous and smooth regulation of the air volume can be realized by stepless regulation; in this way, the exhaust speed of the ventilation cabinet can be accurately controlled according to specific requirements of the experiment process, and the application range of equipment is widened.

Description

Technical Field

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

[0002] Fume hoods are local exhaust devices widely used in laboratories and other environments where harmful gases, vapors, dusts or biological hazards need to be controlled.

[0003] The air volume of existing fume hoods is mostly adjusted in multiple gears by controlling the motor speed, and cannot be adjusted steplessly. As a result, excessive air volume may cause the sample to be sucked away, affecting the accuracy of the experimental data; while too small an air volume may not effectively eliminate harmful substances, which also interferes with the experimental results. When the existing fume hood is in use, it is flushed by the gas mixed with chemical reagents for a long time, resulting in a large amount of chemical reagents attached to the inner end surface of the hood. The reagents attached to the inner end surface of the hood may evaporate again with temperature changes or airflow disturbances, causing secondary pollution of the laboratory air, posing a potential threat to the health of experimenters, and the inner end surface of the hood is difficult to clean. Therefore, a fume hood is needed to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a fume hood top cover, which has the advantages of easy adjustment of wind speed and easy cleaning, and solves the problems in the prior art that the ventilation volume of the fume hood is inconvenient to adjust and a large amount of reagents attached to the inner wall of the fume hood easily cause secondary pollution and endanger the health of experimenters.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fume hood top cover, comprising a fume hood body and a top cover body, wherein the inner wall of the top cover body is provided with an air regulating mechanism and a cleaning mechanism;

[0006] An exhaust port is provided on the top of the top cover body, and the air regulating mechanism includes a wind shield plate, a screw rod and a motor. A slide groove is provided on the side of the top cover body, and the wind shield plate is inserted into the slide groove and is slidably connected with the top cover body. An ear plate is provided on the side wall of the wind shield plate, and a screw hole is provided on the ear plate. The screw rod is inserted into the screw hole and is threadedly connected with the ear plate. Both ends of the screw rod are rotatably connected with the top cover body, and the motor is keyed to the screw rod.

[0007] As a preferred fume hood top cover of the utility model, a fixed baffle is provided on the inner end surface of the top cover body, and the fixed baffle is located directly below the ear plate.

[0008] As a preferred fume hood top cover of the utility model, the cleaning mechanism includes a mounting rod and cleaning cotton, the cleaning cotton is sleeved on the mounting rod and slidably connected thereto, and the cleaning cotton is slidably contacted with the lower end surface of the wind shield.

[0009] As a preferred fume hood top cover of the utility model, the front end face of the mounting rod is provided with an end cover, the side face of the end cover is provided with an external thread, the front end face of the top cover body is provided with a mounting hole, the inner end face of the mounting hole is provided with an internal thread, and the end cover is inserted into the mounting hole and threadedly connected with the top cover body.

[0010] As a preferred embodiment of a fume hood top cover of the utility model, a material receiving plate is provided at the lower end of the mounting rod, and the material receiving plate is an arc-shaped structure.

[0011] As a preferred fume hood top cover of the utility model, a water baffle is provided at a section of the material receiving plate away from the end cover.

[0012] As a preferred fume hood top cover of the utility model, a controller electrically connected to the motor is provided on the front end surface of the fume hood body.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] 1. The utility model sets an air adjustment mechanism in the main body of the top cover to prevent excessive air volume from sucking away the sample and affecting the accuracy of the experimental data. Too small air volume will make it impossible to effectively remove harmful substances. The stepless adjustment can achieve continuous and smooth adjustment of the air volume. In this way, the exhaust speed of the fume hood can be accurately controlled according to the specific needs of the experimental process, thereby improving the scope of application of the equipment.

[0015] 2. The utility model sets a cleaning mechanism in the main body of the top cover, and regularly removes chemical reagents attached to the inner wall of the top cover to prevent corrosion, blockage and secondary volatilization caused by long-term accumulation, thereby reducing the concentration of harmful substances in the laboratory environment, protecting the health of experimenters, and reducing damage to the structure of the fume hood itself. Regular cleaning and removal of chemical residues can prevent continuous erosion of the internal materials of the fume hood, thereby extending the service life of the fume hood and its components. The threaded installation structure simplifies the complexity of cleaning work inside the fume hood, allowing laboratory staff to quickly complete cleaning tasks. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is an exploded view of the top cover body of the utility model;

[0018] Figure 3 It is a front cross-sectional view of the top cover of the utility model;

[0019] Figure 4 It is a front view of the utility model;

[0020] Figure 5This is a schematic diagram of the cleaning mechanism structure of the utility model.

[0021] In the figure: 1. wind cabinet body; 101. controller; 2. top cover body; 201. exhaust port; 202. slide slot; 203. mounting hole; 204. fixed baffle; 3. air adjustment mechanism; 301. screw rod; 302. wind baffle; 303. motor; 304. ear plate; 4. cleaning mechanism; 401. cleaning cotton; 402. mounting rod; 403. end cover; 404. receiving plate; 405. water baffle. DETAILED DESCRIPTION

[0022] See also Figure 1-Figure 5 A fume hood top cover comprises a fume hood body 1 and a top cover body 2, wherein an air regulating mechanism 3 and a cleaning mechanism 4 are arranged on the inner wall of the top cover body 2;

[0023] An exhaust port 201 is provided at the top of the top cover body 2, and the air adjustment mechanism 3 includes a wind shield plate 302, a screw rod 301 and a motor 303. A slide groove 202 is provided on the side of the top cover body 2, and the wind shield plate 302 is inserted into the slide groove 202 and is slidably connected with the top cover body 2. An ear plate 304 is provided on the side wall of the wind shield plate 302, and a screw hole is provided on the ear plate 304. The screw rod 301 is inserted into the screw hole and is threadedly connected with the ear plate 304. Both ends of the screw rod 301 are rotatably connected to the top cover body 2, and the motor 303 is keyed to the screw rod 301.

[0024] When the fume hood is in use, the fume hood power switch is turned on, and the fan in the fume hood body 1 is started. According to the amount of harmful gas generated in the experiment, the controller 101 is operated to make the motor 303 adjust the position of the baffle, thereby adjusting the exhaust speed. After the experiment is completed, the experimental operation is stopped first to ensure that the fume hood continues to run for a period of time to exhaust the remaining harmful gas. At the same time, the wind shield 302 is driven by the motor 303 to slide back and forth, so that the cleaning cotton 401 wipes the wind shield 302. After cleaning, the end cover 403 is removed to clean the cleaning mechanism 4.

[0025] A fixed baffle 204 is provided on the inner end surface of the top cover body 2 , and the fixed baffle 204 is located directly below the ear plate 304 .

[0026] The gap between the wind shield plate 302 and the top cover body 2 is blocked by the fixed baffle plate 204, thereby improving the sealing effect of the wind shield plate 302, thereby facilitating better adjustment of the air volume.

[0027] The cleaning mechanism 4 includes a mounting rod 402 and a cleaning cotton 401 . The cleaning cotton 401 is sleeved on the mounting rod 402 and is slidably connected thereto. The cleaning cotton 401 is slidably contacted with the lower end surface of the wind shield 302 .

[0028] The long-term flushing of the airflow causes the chemical reagent to dock with the lower end surface of the wind shield 302. When the motor 303 drives the wind shield 302 to move, the cleaning cotton 401 cleans the lower end surface of the wind shield 302, thereby wiping off the reagent attached to its lower end surface.

[0029] The front end face of the mounting rod 402 is provided with an end cover 403, the side face of the end cover 403 is provided with an external thread, the front end face of the top cover body 2 is provided with a mounting hole 203, the inner end face of the mounting hole 203 is provided with an internal thread, and the end cover 403 is inserted into the mounting hole 203 and is threadedly connected with the top cover body 2.

[0030] The threaded end cover 403 structure makes it easy to take out the cleaning mechanism 4 from the front end surface so as to clean it.

[0031] A material receiving plate 404 is disposed at the lower end of the mounting rod 402 , and the material receiving plate 404 is an arc-shaped structure.

[0032] The reagent and dust residues swept off by the cleaning cotton 401 are received by the receiving plate 404 .

[0033] A water baffle 405 is provided at a section of the receiving plate 404 away from the end cover 403 .

[0034] The water baffle plate 405 and the material receiving plate 404 form a semi-enclosed structure for the cleaning cotton 401 , so that a cleaning agent or an adsorbent can be added to the upper end of the material receiving plate 404 according to the properties of the reagent, thereby improving the cleaning effect on the windshield plate 302 .

[0035] A controller 101 electrically connected to the motor 303 is disposed on the front end surface of the fume hood body 1 .

[0036] The rotation of the motor 303 is controlled by the controller 101, so that the air volume can be adjusted conveniently, and the wind shield 302 can also be self-cleaned, thereby improving the convenience of operation.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fume hood cover, comprising a fume hood body (1) and a cover body (2), characterized in that: The inner wall of the top cover body (2) is provided with an air regulating mechanism (3) and a cleaning mechanism (4); The top of the top cover body (2) is provided with an air outlet (201), the air adjustment mechanism (3) comprises a wind shield (302), a screw rod (301) and a motor (303), a side of the top cover body (2) is provided with a slide groove (202), the wind shield (302) is inserted into the slide groove (202) and is slidably connected to the top cover body (2), a side wall of the wind shield (302) is provided with an ear plate (304), the ear plate (304) is provided with a screw hole, the screw rod (301) is inserted into the screw hole and is threadedly connected to the ear plate (304), both ends of the screw rod (301) are rotatably connected to the top cover body (2), and the motor (303) is keyed to the screw rod (301).

2. A fume hood top cover according to claim 1, characterized in that: A fixed baffle (204) is provided on the inner end surface of the top cover body (2), and the fixed baffle (204) is located directly below the ear plate (304).

3. The fume hood cover according to claim 1, characterized in that: The cleaning mechanism (4) comprises a mounting rod (402) and cleaning cotton (401); the cleaning cotton (401) is sleeved on the mounting rod (402) and slidably connected thereto; the cleaning cotton (401) is slidably contacted with the lower end surface of the windshield plate (302).

4. A fume hood top cover according to claim 3, characterized in that: The front end face of the mounting rod (402) is provided with an end cover (403), the side face of the end cover (403) is provided with an external thread, the front end face of the top cover body (2) is provided with a mounting hole (203), the inner end face of the mounting hole (203) is provided with an internal thread, and the end cover (403) is inserted into the mounting hole (203) and is threadedly connected to the top cover body (2).

5. A fume hood top cover according to claim 4, characterized in that: A material receiving plate (404) is provided at the lower end of the mounting rod (402), and the material receiving plate (404) is an arc-shaped structure.

6. A fume hood top cover according to claim 5, characterized in that: A water retaining plate (405) is provided at a section of the material receiving plate (404) away from the end cover (403).

7. The fume hood top cover according to claim 1, characterized in that: A controller (101) electrically connected to the motor (303) is provided on the front face of the fume hood body (1).

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