Ventilation cabinet for experiment

Abstract

The utility model discloses a ventilation cabinet for experiments, which comprises a cabinet body, a test chamber is formed in the cabinet body, the front surface of the cabinet body is also provided with a material changing port, the material changing port is communicated with the test chamber, and the inner side wall of the test chamber is provided with a first guide plate and a second guide plate; according to the ventilation cabinet, the test chamber is arranged for placing a sample for testing, then the first flow guide plate and the second flow guide plate are arranged to form the exhaust channel, poisonous gas generated in the test process can be exhausted in cooperation with the exhaust port, and meanwhile most liquid in the poisonous gas can be collected through the arrangement of the first flow guide plate and the second flow guide plate; by arranging the gate and the counterweight frame, the material changing opening is opened or closed, a user can conveniently conduct a closed test on the sample, toxic gas is effectively prevented from entering the atmosphere from the material changing opening, and the whole structure is practical, reliable, easy and convenient to operate, small in size and small in occupied space.

Description

Technical Field

[0001] The utility model relates to the technical field of experimental equipment, in particular to a fume hood for experiments. Background Art

[0002] A laboratory is a place where experiments are conducted. The laboratory is the cradle of science, the base of scientific research, the source of technological development, and plays a very important role in the development of science and technology. Various instruments are usually placed in the laboratory, and various tests can be carried out. Some samples will produce toxic gases during the test, and need to be tested in a closed space. Usually, a fume hood is used, but since most of the existing fume hoods are not completely closed, they only rely on the air filtration system to extract toxic gases, and the airtightness is insufficient. The publication number is CN215745406U, which discloses a fume hood, including a cabinet connected to the top outer wall of the storage box, and the cabinet is provided with a ventilation mechanism, a dustproof mechanism and an adjustment mechanism in sequence, and the ventilation mechanism includes a baffle, a ventilation grille fixedly connected to the baffle, and two strips connected to the outer wall on the back of the baffle. The dustproof mechanism includes a servo motor fixed to the upper outer wall of one side of the cabinet by bolts, and a winding roller sleeved on the output shaft of the servo motor. The utility model is provided with a ventilation mechanism to improve the ventilation performance of the cabinet top, which is conducive to the placement of items, and is provided with a dustproof mechanism to achieve a good dustproof effect when the items are not in use; an adjustment mechanism is provided to flexibly adjust the position of the placement plate, and then the space in the cabinet can be flexibly divided, thereby improving the space utilization rate of the entire fume hood. The fume hood cannot be completely closed and is not airtight enough. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model aims to provide a practical and reliable experimental fume hood.

[0004] To achieve the above-mentioned purpose, the utility model provides a solution as follows: an experimental fume hood, comprising a cabinet, a test chamber is formed in the cabinet, a material change port is provided on the front of the cabinet, the material change port is connected to the test chamber, two first guide plates and a second guide plate are provided on the inner wall of the test chamber, a gap is left between the second guide plate and the inner wall of the test chamber, and between the two first guide plates and the inner wall of the test chamber, for forming an exhaust channel, the exhaust channel is used to collect gas in the test chamber, an exhaust port is provided on the top of the cabinet, and the exhaust channel is connected to the exhaust port upward;

[0005] A gate is arranged at the material changing port, and the gate moves up and down to open or close the material changing port. A counterweight frame is arranged at the back of the cabinet, and a chain is connected between the gate and the counterweight frame.

[0006] The beneficial effects of the utility model are as follows: the overall operation is simple and easy. The fume hood is provided with a test chamber for placing samples for testing, and then a first guide plate and a second guide plate are provided to form an exhaust channel. The toxic gas generated during the test can be discharged in conjunction with the exhaust port. At the same time, the first guide plate and the second guide plate are provided to collect most of the liquid in the toxic gas. The gate and the counterweight frame are provided to open or close the material change port, which is convenient for users to conduct closed tests on samples and effectively prevent toxic gases from entering the atmosphere from the material change port. The overall structure is practical and reliable, easy to operate, and the overall structure is small and occupies little space.

[0007] Furthermore, the two first guide plates are both arranged vertically, and the second guide plate is arranged obliquely. After the utility model adopts the above structure, liquid in toxic gas can be collected.

[0008] Furthermore, gaps are left between the first guide plate and the bottom of the test chamber, between the two first guide plates, and between the second guide plate and the top of the test chamber to form air inlets, and the three air inlets are connected to exhaust channels respectively.

[0009] Furthermore, the inner wall of the test chamber is provided with a plurality of fixing members, each of which is provided with a fixing handle, and the fixing handle is rotated to press and fix the first guide plate or the second guide plate onto the fixing member. After the utility model adopts the above structure, the first guide plate and the second guide plate can be detachably installed.

[0010] Furthermore, lifting guide rails are respectively arranged on the left and right sides of the material exchange port, the lifting guide rails are arranged vertically, and lifting seats are slidably connected to the lifting guide rails, and the two lifting seats are commonly connected to the gate.

[0011] Furthermore, there are two chains, one chain is connected to a lifting seat, and the two chains are commonly connected to the counterweight frame, wherein the top of the cabinet is rotatably connected to a plurality of transmission gears, the transmission gears are meshed with the chains, and a transmission shaft is connected between two opposite transmission gears.

[0012] Furthermore, a discharge port is provided at the bottom of the test chamber.

[0013] Furthermore, the left and right inner walls of the test chamber are respectively provided with side inspection doors.

[0014] Furthermore, a lighting lamp is arranged on the top of the inner wall of the test chamber.

[0015] Furthermore, the top of the counterweight frame is provided with a plurality of installation slots, in which the counterweight blocks are placed. After the utility model adopts the above structure, the gate can be controlled to move up and down by placing or removing the counterweight blocks, without the need to set a motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The overall structure of the utility model is three-dimensional Figure 1 .

[0017] Figure 2 The overall structure of the utility model is three-dimensional Figure 2 .

[0018] Figure 3 The overall structure of the utility model is three-dimensional Figure 3 .

[0019] Figure 4 The overall structure of the utility model is three-dimensional Figure 4 .

[0020] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0021] Among them, 1 is a box body, 11 is a test chamber, 12 is a material change port, 121 is a lifting guide rail, 13 is a first guide plate, 14 is a second guide plate, 15 is an exhaust channel, 16 is an exhaust port, 17 is an air inlet, 18 is a discharge port, 19 is a side inspection door, 21 is a counterweight frame, 211 is a mounting groove, 22 is a chain, 23 is a lifting seat, 24 is a transmission gear, 25 is a transmission shaft, 31 is a fixing part, 32 is a fixing handle, and 4 is a lighting lamp. DETAILED DESCRIPTION

[0022] The technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] See attached Figure 1 To Attachment Figure 5As shown, an experimental fume hood includes a cabinet body 1, a test chamber 11 is formed in the cabinet body 1, and a material change port 12 is provided on the front of the cabinet body 1, the material change port 12 is connected to the test chamber 11, and two first guide plates 13 and a second guide plate 14 are provided on the inner wall of the test chamber 11. A gap is left between the second guide plate 14 and the inner wall of the test chamber 11, and between the two first guide plates 13 and the inner wall of the test chamber 11, for forming an exhaust channel 15, and the exhaust channel 15 is used to collect the gas in the test chamber 11. An exhaust port 16 is opened on the top of the cabinet body 1, and the exhaust channel 15 is connected to the exhaust port 16 upward.

[0025] A gate is provided at the material exchange port 12 , and the gate moves up and down to open or close the material exchange port 12 . A counterweight frame 21 is provided at the back of the cabinet 1 , and a chain 22 is connected between the gate and the counterweight frame 21 .

[0026] In this embodiment, the two first guide plates 13 are both arranged vertically, and the second guide plate 14 is arranged obliquely.

[0027] In this embodiment, gaps are left between the first guide plate 13 and the bottom of the test chamber 11, between the two first guide plates 13, and between the second guide plate 14 and the top of the test chamber 11 to form air inlets 17. The three air inlets 17 are respectively connected to the exhaust channels 15.

[0028] In this embodiment, a plurality of fixing members 31 are disposed on the inner wall of the test chamber 11 , and each fixing member 31 is provided with a fixing handle 32 . The fixing handle 32 is rotated to press and fix the first guide plate 13 or the second guide plate 14 onto the fixing member 31 .

[0029] In this embodiment, lifting rails 121 are respectively provided on the left and right sides of the material exchange port 12. The lifting rails 121 are vertically arranged. Lifting seats 23 are slidably connected to the lifting rails 121. The two lifting seats 23 are commonly connected to the gate.

[0030] In this embodiment, there are two chains 22, one chain 22 is connected to a lifting seat 23, and the two chains 22 are commonly connected to the counterweight frame 21, wherein a plurality of transmission gears 24 are rotatably connected to the top of the cabinet 1, and the transmission gears 24 are meshed with the chains 22, wherein a transmission shaft 25 is connected between two opposite transmission gears 24.

[0031] In this embodiment, a discharge port 18 is opened at the bottom of the test chamber 11 .

[0032] In this embodiment, side inspection doors 19 are respectively provided on the left and right inner walls of the test chamber 11 .

[0033] In this embodiment, an illumination lamp 4 is disposed on the top of the inner wall of the test chamber 11 .

[0034] In this embodiment, the exhaust port 16 is connected to an air filtering system, and the air filtering system sucks the gas output from the exhaust port 16 .

[0035] In this embodiment, the specific working process is as follows: first, the corresponding articles to be tested are placed in the test chamber and mixed to make the articles react, then a set number of counterweight blocks are taken out from the counterweight rack 21, the counterweight rack 21 is moved upward, and the gate is moved downward until the gate completely closes the material exchange port 12, and the air filtration system is started synchronously to generate toxic gas when the articles react. The toxic gas is guided by the two first guide plates 13 and the second guide plate 14 which is inclined, so that most of the liquid in the toxic gas remains on the first guide plate 13 and the second guide plate 14, and is collected and discharged through the discharge port 18, and the remaining toxic gas enters the exhaust channel 15 through the three air inlets 17, enters the air filtration system through the exhaust port 16 for filtration treatment, and then is discharged into the atmosphere;

[0036] After the test is completed, the counterweight block originally taken out is put back into the corresponding installation groove 211 in the counterweight frame 21, so that the weight of the counterweight frame 21 is greater than the gate, and the counterweight frame 21 moves downward, thereby pulling the gate upward to open the material exchange port 12, and then take out the items in the test chamber 11.

[0037] The embodiments described above are only preferred embodiments of the present invention and do not limit the present invention in any form. Any technician familiar with the field can use the above disclosed technical content to make more possible changes and modifications to the technical solution of the present invention without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, all equivalent and equivalent changes made according to the idea of ​​the present invention without departing from the content of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A laboratory fume hood, comprising a cabinet body (1), characterized in that: A test chamber (11) is formed in the cabinet (1), and a material exchange port (12) is provided on the front of the cabinet (1), the material exchange port (12) is connected to the test chamber (11), and two first guide plates (13) and a second guide plate (14) are provided on the inner side wall of the test chamber (11), and a gap is left between the second guide plate (14) and the inner side wall of the test chamber (11), and between the two first guide plates (13) and the inner side wall of the test chamber (11), so as to form an exhaust channel (15), and the exhaust channel (15) is used to collect gas in the test chamber (11), and an exhaust port (16) is provided on the top of the cabinet (1), and the exhaust channel (15) is connected to the exhaust port (16) upwards; A gate is provided at the material exchange port (12), and the gate moves up and down to open or close the material exchange port (12). A counterweight frame (21) is provided on the back of the cabinet (1), and a chain (22) is connected between the gate and the counterweight frame (21).

2. The experimental fume hood according to claim 1, characterized in that: The two first guide plates (13) are both arranged vertically, and the second guide plate (14) is arranged obliquely.

3. The experimental fume hood according to claim 2, characterized in that: Gaps are left between the first guide plate (13) and the bottom of the test chamber (11), between the two first guide plates (13), and between the second guide plate (14) and the top of the test chamber (11) to form air inlets (17). The three air inlets (17) are respectively connected to the exhaust channels (15).

4. The experimental fume hood according to claim 3, characterized in that: A plurality of fixing members (31) are provided on the inner side wall of the test chamber (11), and each fixing member (31) is provided with a fixing handle (32). By rotating the fixing handle (32), the fixing handle (32) can press and fix the first guide plate (13) or the second guide plate (14) onto the fixing member (31).

5. The experimental fume hood according to claim 4, characterized in that: Lifting guide rails (121) are respectively arranged on the left and right sides of the material exchange port (12); the lifting guide rails (121) are arranged vertically; a lifting seat (23) is slidably connected to the lifting guide rails (121); and the two lifting seats (23) are connected to the gate.

6. The experimental fume hood according to claim 5, characterized in that: The number of the chains (22) is two, one chain (22) is connected to a lifting seat (23), and the two chains (22) are connected to the counterweight frame (21) together, wherein a plurality of transmission gears (24) are rotatably connected to the top of the cabinet (1), the transmission gears (24) are meshed with the chains (22), and a transmission shaft (25) is connected between two opposite transmission gears (24).

7. The experimental fume hood according to claim 6, characterized in that: The bottom of the test chamber (11) is provided with a discharge port (18).

8. The experimental fume hood according to claim 7, characterized in that: The left and right inner walls of the test chamber (11) are respectively provided with side inspection doors (19).

9. The experimental fume hood according to claim 8, characterized in that: An illuminating lamp (4) is arranged on the top of the inner wall of the test chamber (11).

10. The experimental fume hood according to claim 9, characterized in that: The top of the counterweight frame (21) is provided with a plurality of installation slots (211), and the installation slots (211) are used for placing counterweight blocks.

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