Laboratory ventilation cabinet

Abstract

The utility model relates to the technical field of laboratory fume cupboards, and particularly discloses a laboratory fume cupboard which comprises a cavity, the left side of the inner wall of the cavity is movably connected with a screw rod through a rotating shaft, the right side of the interior of the cavity is provided with a motor, the output end of the motor is fixedly connected with the screw rod, and the outer wall of the screw rod is in threaded connection with a sliding sleeve. A treatment cavity is formed in the lower end face of the sliding sleeve, a filter plate is inserted into the treatment cavity, a plurality of air inlets are formed in the lower end face of the treatment cavity in a penetrating mode, and an exhaust fan is installed on the upper end face of the ventilation cabinet body, so that the sliding sleeve drives the treatment cavity to move left and right, and toxic gas in the ventilation cabinet body enters the treatment cavity through the air inlets; and along with left-right movement of the treatment cavity, the air exhaust area can be increased, toxic gas in the ventilation cabinet body can be exhausted more comprehensively and efficiently, and then a limiting rod is separated from a limiting groove, so that the filter plate is conveniently taken out of the treatment cavity and cleaned and maintained.

Description

Technical Field

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

[0002] Fume hoods are an indispensable type of laboratory furniture. The most important function of a fume hood is the exhaust function. In chemical laboratories, various harmful gases, odors, moisture, and flammable, explosive, and corrosive substances are generated during experimental operations. In order to protect the safety of users and prevent the pollutants in the experiment from spreading to the laboratory, fume hoods must be used near the pollution source.

[0003] The ventilated medicine cabinet in the laboratory is generally used to store some medicines that emit toxic gases and to conduct drug experiments. In order to ensure that the test personnel will not inhale excessive toxic gases and cause personal safety, a blowing device is generally installed on the test platform cabinet of the ventilated medicine cabinet to blow away the toxic gases.

[0004] At present, during the operation of laboratory fume hoods, most of the blowing or suction devices are fixed structures, which reduces the area and efficiency of rapid extraction of toxic gases. Therefore, it is necessary to propose a laboratory fume hood to solve the above-mentioned problems. Utility Model Content

[0005] The utility model aims to provide a laboratory fume hood, which has the characteristics of increasing the exhaust area and more comprehensively and efficiently extracting the toxic gas in the fume hood body, and secondly facilitating the removal of the filter plate from the processing chamber and cleaning and maintaining it.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a laboratory fume hood, comprising a fume hood body, the upper end surface of the interior of the fume hood body is provided with a cavity, the left side of the inner wall of the cavity is movably connected with a screw through a rotating shaft, a motor whose output end is fixedly connected to the screw is installed on the right side of the cavity, the outer wall of the screw is threadedly connected with a sliding sleeve, a processing chamber is installed on the lower end surface of the sliding sleeve, a filter plate is inserted in the interior of the processing chamber, a plurality of air inlets are penetrated and opened on the lower end surface of the processing chamber, an exhaust fan is installed on the upper end surface of the fume hood body, and a connecting hose that penetrates the fume hood body is connected between the lower end surface of the exhaust fan and the processing chamber;

[0007] The left and right sides of the processing chamber are fixedly connected with sliding grooves, the front end surfaces of the two sliding grooves are slidably connected with sliding plates, the opposite sides of the two sliding plates are fixedly connected with two limit rods, the left and right sides of the filter plate are detachably connected with extension plates slidably connected to the processing chamber, and the opposite sides of the two extension plates are provided with two limit grooves matching the limit rods.

[0008] In order to adsorb some of the toxic gases in the fume hood body, as a preferred laboratory fume hood of the utility model, the left and right sides of the interior of the fume hood body are connected with mounting plates by bolts, and activated carbon adsorption plates are installed on the opposite sides of the two mounting plates.

[0009] In order to slide the filter plate and the extension plate in the processing chamber, as a preferred laboratory fume hood of the utility model, sliding openings are opened through both the left and right sides of the processing chamber.

[0010] In order to limit the position of the sliding sleeve, as a preferred laboratory fume hood of the utility model, the interior of the cavity is fixedly connected with a guide rod located below the screw rod and slidably connected to the sliding sleeve.

[0011] In order to pull the filter plate outward for cleaning and maintenance, as a preferred embodiment of a laboratory fume hood of the utility model, a pull rod is installed on the front end surface of the filter plate.

[0012] In order to limit and fix the sliding groove and the sliding plate, as a preferred laboratory fume hood of the utility model, the sliding groove and the sliding plate are connected by bolts.

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

[0014] The utility model firstly enables the sliding sleeve to drive the processing chamber to move left and right, and the toxic gas in the fume hood body enters the processing chamber from the air inlet, and is filtered and discharged from the fume hood body through the filter plate. As the processing chamber moves left and right, the exhaust area can be increased and the toxic gas in the fume hood body can be extracted more comprehensively and efficiently. Secondly, the limiting rod is separated from the limiting groove, so that it is convenient to take the filter plate out of the processing chamber and clean and maintain it. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the overall structure diagram of the utility model;

[0016] Figure 2 This is a structural diagram of the processing chamber of the utility model;

[0017] Figure 3 This is a three-dimensional structural diagram of the activated carbon adsorption plate of the utility model.

[0018] In the figure: 1. fume hood body; 2. cavity; 201. screw; 202. motor; 203. guide rod; 204. sleeve; 3. processing chamber; 301. exhaust fan; 302. connecting hose; 303. air inlet; 304. filter plate; 4. extension plate; 401. limit groove; 402. sliding groove; 403. sliding plate; 404. limit rod; 5. mounting plate; 501. activated carbon adsorption plate. DETAILED DESCRIPTION

[0019] See also Figures 1 to 3 A laboratory fume hood comprises a fume hood body 1, a cavity 2 is provided on the upper end surface of the interior of the fume hood body 1, a screw 201 is movably connected to the left side of the inner wall of the cavity 2 through a rotating shaft, a motor 202 whose output end is fixedly connected to the screw 201 is installed on the right side of the interior of the cavity 2, a sleeve 204 is threadedly connected to the outer wall of the screw 201, a processing chamber 3 is installed on the lower end surface of the sleeve 204, a filter plate 304 is inserted in the interior of the processing chamber 3, a plurality of air inlets 303 are penetrated and opened on the lower end surface of the processing chamber 3, an exhaust fan 301 is installed on the upper end surface of the fume hood body 1, and a connecting hose 302 that penetrates the fume hood body 1 is connected between the lower end surface of the exhaust fan 301 and the processing chamber 3;

[0020] The left and right sides of the processing chamber 3 are fixedly connected with sliding grooves 402, the front end surfaces of the two sliding grooves 402 are slidably connected with sliding plates 403, the opposite sides of the two sliding plates 403 are fixedly connected with two limit rods 404, the left and right sides of the filter plate 304 are detachably connected with extension plates 4 that are slidably connected to the processing chamber 3, and the opposite sides of the two extension plates 4 are provided with two limit grooves 401 that match the limit rods 404.

[0021] In this embodiment: when it is necessary to treat the toxic gas in the fume hood body 1, the motor 202 and the exhaust fan 301 can be operated, so that the motor 202 drives the screw 201 to rotate, prompting the sleeve 204 to drive the processing chamber 3 to move left and right, and then the exhaust fan 301 can transmit the suction force to the processing chamber 3 through the connecting hose 302, prompting the toxic gas in the fume hood body 1 to enter the processing chamber 3 from the air inlet 303, and be discharged from the fume hood body 1 after being filtered by the filter plate 304. As the processing chamber 3 moves left and right, the exhaust area can be increased and the toxic gas in the fume hood body 1 can be extracted more comprehensively and efficiently. Secondly, the sliding plate 403 is slid, so that the sliding plate 403 drives the limiting rod 404 away from the processing chamber 3, and then the limiting rod 404 can be separated from the limiting groove 401, so as to facilitate the removal of the filter plate 304 from the processing chamber 3 and its cleaning and maintenance.

[0022] As a technical optimization solution of the present invention, the left and right sides of the interior of the fume hood body 1 are connected with mounting plates 5 by bolts, and activated carbon adsorption plates 501 are installed on opposite sides of the two mounting plates 5.

[0023] In this embodiment: the mounting plate 5 is used to facilitate the installation of the activated carbon adsorption plate 501 inside the fume hood body 1. At the same time, the activated carbon adsorption plate 501 can assist the exhaust fan 301 to adsorb part of the toxic gas in the fume hood body 1, thereby improving the gas treatment efficiency.

[0024] As a technical optimization solution of the present invention, sliding openings are provided through both left and right sides of the processing chamber 3 .

[0025] In this embodiment, the filter plate 304 and the extension plate 4 are slidably installed in the processing chamber 3 through the sliding opening.

[0026] As a technical optimization solution of the present invention, a guide rod 203 located below the screw rod 201 and slidably connected to the sliding sleeve 204 is fixedly connected to the interior of the cavity 2 .

[0027] In this embodiment, the guide rod 203 can limit the position of the sliding sleeve 204 to prevent the sliding sleeve 204 from rotating along with the screw rod 201 .

[0028] As a technical optimization solution of the present invention, a pull rod is installed on the front end surface of the filter plate 304 .

[0029] In this embodiment, the filter plate 304 is pulled outwards for cleaning and maintenance by a pull rod.

[0030] As a technical optimization solution of the present invention, the sliding groove 402 and the sliding plate 403 are connected by bolts.

[0031] In this embodiment, the sliding groove 402 and the sliding plate 403 can be fixed in position by bolts.

[0032] Working principle: First, when it is necessary to treat the toxic gas in the fume hood body 1, the motor 202 and the exhaust fan 301 can be operated, so that the motor 202 drives the screw 201 to rotate, prompting the sleeve 204 to drive the processing chamber 3 to move left and right, and then the exhaust fan 301 can transmit the suction force to the processing chamber 3 through the connecting hose 302, so that the toxic gas in the fume hood body 1 enters the processing chamber 3 from the air inlet 303, and is filtered through the filter plate 304 and then discharged from the fume hood body 1. As the processing chamber 3 moves left and right, the exhaust area can be increased and the toxic gas in the fume hood body 1 can be extracted more comprehensively and efficiently. Secondly, the sliding plate 403 is slid, so that the sliding plate 403 drives the limiting rod 404 away from the processing chamber 3, and then the limiting rod 404 can be separated from the limiting groove 401, so as to facilitate the removal of the filter plate 304 from the processing chamber 3 and its cleaning and maintenance.

[0033] 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 laboratory fume hood, comprising a fume hood body (1), characterized in that: A cavity (2) is provided on the upper end surface of the interior of the fume hood body (1); a screw (201) is movably connected to the left side of the inner wall of the cavity (2) via a rotating shaft; a motor (202) whose output end is fixedly connected to the screw (201) is installed on the right side of the interior of the cavity (2); a sleeve (204) is threadedly connected to the outer wall of the screw (201); a processing chamber (3) is installed on the lower end surface of the sleeve (204); a filter plate (304) is inserted into the interior of the processing chamber (3); a plurality of air inlets (303) are penetrated through the lower end surface of the processing chamber (3); an exhaust fan (301) is installed on the upper end surface of the fume hood body (1); a connecting hose (302) that penetrates the fume hood body (1) is connected between the lower end surface of the exhaust fan (301) and the processing chamber (3); The left and right sides of the processing chamber (3) are fixedly connected with sliding grooves (402), the front end surfaces of the two sliding grooves (402) are slidably connected with sliding plates (403), and the opposite sides of the two sliding plates (403) are fixedly connected with two limit rods (404), and the left and right sides of the filter plate (304) are detachably connected with extension plates (4) slidably connected to the processing chamber (3), and the opposite sides of the two extension plates (4) are provided with two limit grooves (401) matching the limit rods (404).

2. A laboratory fume hood according to claim 1, characterized in that: The left and right sides of the interior of the fume hood body (1) are both connected with mounting plates (5) by bolts, and the two opposite sides of the mounting plates (5) are both installed with activated carbon adsorption plates (501).

3. A laboratory fume hood according to claim 1, characterized in that: Sliding openings are provided on both left and right sides of the processing chamber (3).

4. A laboratory fume hood according to claim 1, characterized in that: A guide rod (203) is fixedly connected to the interior of the cavity (2) and is located below the screw rod (201) and is slidably connected to the sliding sleeve (204).

5. A laboratory fume hood according to claim 1, characterized in that: A pull rod is installed on the front end surface of the filter plate (304).

6. A laboratory fume hood according to claim 1, characterized in that: The sliding groove (402) and the sliding plate (403) are connected by bolts.

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