Chemical laboratory workbench

Abstract

The utility model relates to the field of laboratory equipment, in particular to a chemical laboratory workbench which comprises an operating table, a fuming cupboard and a reagent cabinet, the fuming cupboard covers the top of the operating table, an exhaust device is arranged on the fuming cupboard, the reagent cabinet is arranged at the bottom of the operating table, and a water tank is formed in the operating table and communicated with a waste liquid collecting device. A check valve is mounted between the water tank and the waste liquid collecting device; the exhaust device is respectively communicated with the external space of the laboratory and the waste liquid collecting device through the three-way air duct, a valve is arranged on the three-way air duct, and the exhaust device is only communicated with the external space of the laboratory or the waste liquid collecting device once; a pressure relief opening is formed in the waste liquid collecting device; the lower end of the ventilation pipe is communicated with the interior of the reagent cabinet, and the upper end of the ventilation pipe directly faces the ventilation cabinet. According to the laboratory workbench, toxic substances can be uniformly purified, toxic gases in a fuming cupboard and a reagent cabinet can be simultaneously discharged by using the same energy source, and the waste of resources is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of laboratory equipment, especially to a chemical laboratory workbench. BACKGROUND

[0002] Chemical laboratory often uses chemical experiment workbench to carry out experiments, and the existing chemical experiment workbench is generally provided with a fume hood to reduce the contact between experimenters and harmful gases, especially during chemical experiments, chemical smoke, dust and toxic gases are usually generated, which need to be discharged in time and effectively to protect the safety of workers and the laboratory environment.

[0003] The existing fume hood only extracts the gas generated in the fume hood during experiments by negative pressure, but the toxic reagents stored in the reagent cabinet also volatilize during storage, which not only harms the human body after a long time, but also pollutes the environment if discharged into the air. However, the volatilization amount of reagents is small in a short time, and if an exhaust device is installed separately for the reagent storage cabinet, it will cause waste of resources and increase the cost. In addition, the gas sucked from the fume hood is usually purified by activated carbon adsorption in the prior art, as shown in the prior art with application number CN202121251743.8, but this method needs to replace the activated carbon regularly, and the replaced activated carbon also needs to be treated additionally. Moreover, the waste water and waste gas are usually purified separately, and multiple devices need to be installed for purification, which is complicated and high in purification cost. SUMMARY

[0004] In view of the above, it is necessary to provide a chemical laboratory workbench which can uniformly purify toxic substances and discharge toxic gases from the fume hood and the reagent cabinet using the same energy source, thereby greatly reducing the waste of resources.

[0005] To achieve the above purpose, the utility model adopts the technical scheme of a chemical laboratory workbench, which comprises an operation table, a fume hood and a reagent cabinet. The fume hood cover is arranged on the top of the operation table, the fume hood is provided with an exhaust device, the reagent cabinet is arranged at the bottom of the operation table, a water tank is opened on the operation table, the water tank is connected with a waste liquid collecting device, and a check valve is installed between the water tank and the waste liquid collecting device. The exhaust device is connected with the laboratory external space and the waste liquid collecting device through a three-way air duct, respectively, and valves are installed on the one end connected with the laboratory external space and the one end connected with the waste liquid collecting device of the three-way air duct. The exhaust device is only connected with the laboratory external space or the waste liquid collecting device at a time. A pressure relief port is opened on the waste liquid collecting device. A ventilation pipe is opened on the operation table, the lower end of the ventilation pipe is connected with the inside of the reagent cabinet, and the upper end of the ventilation pipe is opposite to the fume hood.

[0006] Further, the exhaust device is an exhaust fan, an air inlet of the exhaust fan is communicated with the inside of the fume hood, and an air outlet of the exhaust fan is communicated with the three-way air duct.

[0007] Further, the exhaust device is communicated with the lower part of the waste liquid collecting device.

[0008] Further, the pressure relief port is located at the upper part of the waste liquid collecting device and is communicated with a waste liquid treatment pool, and the waste liquid treatment pool is arranged on the operation table or outside the operation table.

[0009] Further, a dosing port is arranged on the waste liquid collecting device.

[0010] Further, the ventilation pipe is located at a corner of the operation table top, and the corner is opposite to the operation end of the operation table.

[0011] Further, the upper end of the ventilation pipe protrudes from the top of the operation table.

[0012] Further, a grille is arranged at the end of the upper end of the ventilation pipe.

[0013] Further, a supplementary air inlet is arranged on the left and right side walls of the fume hood, and the supplementary air inlet is arranged close to the top of the operation table.

[0014] Further, a fan is arranged on the supplementary air inlet, and an air outlet of the fan is directed to the inside of the fume hood.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. According to the three-way air duct, whether the gas is purified can be selected according to whether toxic gas is generated in the experiment, and the toxic gas is introduced into the waste liquid collecting device, the gas is further purified by using the waste liquid, the toxic substances are uniformly purified by adding the liquid medicine for treating the corresponding toxic substances in the waste liquid collecting device, the installation of equipment is reduced, the purified substances do not need to be additionally treated subsequently, and the treatment cost of waste water and waste gas can be greatly reduced.

[0017] 2. The ventilation pipe communicated with the inside of the reagent cabinet is arranged on the operation table, the toxic reagent or the gas volatilized from the reagent cabinet can be exhausted when the fume hood is exhausted, the harm of toxic gas or irritating smell to the human body is reduced, the same energy is used to exhaust the toxic gas in the fume hood and the reagent cabinet, the exhaust device needs to be installed on the reagent cabinet to exhaust the air, and resource waste is greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 is the front view of the utility model.

[0019] Fig. 2 is the front view of the utility model.

[0020] Fig. 3 is the side view of the utility model.

[0021] Main element symbol explanation

[0022] In the drawing: 1 - operation platform, 11 - sink, 12 - ventilation pipe, 121 - grating,

[0023] 13 - waste liquid collecting device, 131 - dosing port, 132 - pressure relief port

[0024] 2 - fume hood, 21 - exhaust fan, 22 - three-way ventilation duct, 23 - air inlet, 231 - fan,

[0025] 3 - reagent cabinet.

[0026] The following specific embodiments will further illustrate the utility model in combination with the above-mentioned drawings. Specific embodiments

[0027] Please refer to Figs. 1-3 In a preferred embodiment of the utility model, a chemical laboratory workbench comprises an operation platform 1, a fume hood 2 and a reagent cabinet 3, the fume hood 2 is covered on the top of the operation platform 1, the fume hood 2 is provided with an exhaust device, the reagent cabinet 3 is arranged at the bottom of the operation platform 1, it is necessary to point out that the fume hood 2 is provided with a transparent glass door that can be closed and opened, since the transparent glass on the fume hood 2 is prior art, and is not the improvement point of the present application, it is not elaborated here, and the person skilled in the art can directly adopt the structure of the transparent glass door on the fume hood 2 in the prior art. Further, the operation platform 1 is provided with a sink 11, the sink 11 is communicated with a waste liquid collecting device 13, a check valve is installed between the sink 11 and the waste liquid collecting device 13; the waste liquid generated in the experiment can be poured into the waste liquid collecting device 13 through the sink 11, and the existence of the check valve can prevent the waste liquid from flowing back. Preferably, the waste liquid collecting device 13 is installed on the operation platform 1 and located directly below the sink 11, which is convenient for directly flowing into the waste liquid collecting device 13.

[0028] Further, the exhaust device is connected with the outside of the laboratory and the waste liquid collecting device 13 through the three-way air duct 22. In this embodiment, the exhaust device is an exhaust fan 21, the air inlet of the exhaust fan 21 is connected with the inside of the fume hood 2, the air outlet of the exhaust fan 21 is connected with the three-way air duct 22, and the gas in the fume hood 2 is exhausted by the exhaust fan 21. Further, the one end of the three-way air duct 22 connected with the outside of the laboratory and the one end connected with the waste liquid collecting device are respectively provided with valves, and the exhaust device is connected with the outside of the laboratory or the waste liquid collecting device 13 at a time. Alternatively, a three-way valve can be used instead of the three-way air duct and the valves on the three-way air duct. The experimenters can judge whether the experiment will produce toxic gas according to the experiment content, and the generated gas can be detected by the waste gas detection equipment arranged between the three-way pipe and the exhaust device before being exhausted. The waste gas detection equipment can be selected according to the actual situation of the laboratory, for example, a gas analyzer, a micro gas chromatograph and the like. If no toxic gas is generated, the valve connected with the outside of the laboratory can be opened, and the gas can be directly exhausted to the outside. If toxic gas is generated, the valve connected with the waste liquid collecting device 13 is opened, and the waste liquid is used to absorb the gas. At the same time, the check valve can prevent the gas from overflowing from the sink 11. Preferably, the connection between the exhaust device and the waste liquid collecting device 13 is located at the lower part of the waste liquid collecting device 13, so that the exhausted gas can directly contact with the liquid in the waste liquid collecting device 13, and the gas can not float on the surface of the waste liquid, so that the purpose of absorbing the gas by the waste liquid can be achieved.

[0029] Preferably, the waste liquid collecting device 13 is provided with a dosing port 131. According to the actual situation of the experiment, the generated waste liquid and toxic gas can be judged, and different reagents can be added through the dosing port 131 according to the generated waste liquid and gas, so that the toxic substances can be uniformly treated. In addition, in order to prevent the gas generated after the treatment of the toxic substances from increasing the internal gas pressure of the waste liquid collecting device 13 and causing explosion, the waste liquid collecting device 13 is provided with a pressure relief port 132 in this embodiment. Preferably, the pressure relief port 132 is located at the upper part of the waste liquid collecting device 13, so as to increase the storage capacity of the waste liquid as much as possible. The pressure relief port 132 is connected with a waste liquid treatment tank, so as to avoid that a small amount of liquid flows out from the pressure relief port 132 and causes the environment to be humid. The waste liquid treatment tank is arranged on the operation table 1 or outside the operation table 1. Generally, the waste liquid treatment tank of the laboratory is arranged underground, and the person skilled in the art can select the arrangement position of the waste liquid treatment tank according to the actual situation.

[0030] Further, the operating table 1 is provided with a ventilation pipe 12, the lower end of the ventilation pipe 12 is communicated with the inside of the reagent cabinet 3, and the upper end is opposite to the fume hood 2. The ventilation pipe 12 can extract the toxic reagent or the gas with irritating smell volatilized from the reagent cabinet 3 while exhausting the fume hood 2, thereby reducing the harm of the toxic gas or the irritating smell to the human body. Preferably, the ventilation pipe is located at a corner of the operating table 1, and the corner is opposite to the operating end of the operating table 1. The ventilation pipe 12 can reduce the influence on the experimental operation. In order to improve the ventilation effect of the reagent cabinet, a plurality of ventilation pipes 12 can be arranged at the corner of the operating table. More preferably, the upper end of the ventilation pipe 12 protrudes from the table top of the operating table 1, so as to prevent the experimental instrument from covering the ventilation pipe 12. In addition, the end of the upper end of the ventilation pipe 12 is provided with a grille 121, so as to prevent sundries from falling into the reagent cabinet 3 through the ventilation pipe 12, and also prevent the sundries from blocking the ventilation pipe 12 after falling into the reagent cabinet 3.

[0031] Preferably, the left and right side walls of the fume hood 2 are provided with air supplementing openings 23, and the air supplementing openings 23 are arranged close to the table top of the operating table 1. The air supplementing openings 23 provide air flow in the fume hood 2, so as to push the waste gas generated above the operating table 1 to be transported upwards. More preferably, the air supplementing openings 23 are provided with fans 231, and the air outlets of the fans 231 are directed to the inside of the fume hood 2. The air flow sent by the fans 231 forms a circulating flow above the operating table 1, and the waste gas generated by the exhaust device is transported to the outside of the fume hood 2. To a certain extent, the circulating dead angle is reduced, so that the gas located at the corner of the fume hood 2 can also be extracted.

[0032] The above description is a detailed description of the preferred and feasible embodiments of the utility model, but the embodiments are not used to limit the patent application range of the utility model. Any equivalent change or modification completed under the technical spirit of the utility model should belong to the patent range covered by the utility model.

Claims

1. A chemical laboratory workbench, comprising an operating table, a fume hood and a reagent cabinet, the fume hood is arranged on the top of the operating table, the fume hood is provided with an exhaust device, and the reagent cabinet is arranged at the bottom of the operating table, characterized in that: The operation table is provided with a sink, the sink is communicated with a waste liquid collecting device, a check valve is installed between the sink and the waste liquid collecting device; the exhaust device is communicated with an external space of the laboratory and the waste liquid collecting device through a three-way air duct, respectively, valves are installed on the end of the three-way air duct communicated with the external space of the laboratory and the end communicated with the waste liquid collecting device, respectively, the exhaust device is only communicated with the external space of the laboratory or the waste liquid collecting device at a time; the waste liquid collecting device is provided with a pressure relief port; the operation table is provided with a ventilation pipe, the lower end of the ventilation pipe is communicated with the inside of a reagent cabinet, and the upper end of the ventilation pipe is opposite to a fume hood.

2. A chemical laboratory bench according to claim 1, characterized in that: The exhaust device is an air extractor, the air inlet of the air extractor is communicated with the inside of the fume hood, and the air outlet of the air extractor is communicated with the three-way air duct.

3. A chemical laboratory bench according to claim 1, characterized in that: The communication between the exhaust device and the waste liquid collecting device is located at the lower part of the waste liquid collecting device.

4. A chemical laboratory bench according to claim 1, characterized in that: The pressure relief port is located at the upper part of the waste liquid collecting device and is communicated with a waste liquid treatment pool, the waste liquid treatment pool is arranged on the operation table or outside the operation table.

5. A chemical laboratory bench according to claim 1, characterized in that: The waste liquid collecting device is provided with a dosing port.

6. A chemical laboratory bench according to claim 1, characterized in that: The ventilation pipe is located at a corner of the operation table top, and the corner is opposite to the operation end of the operation table.

7. A chemical laboratory bench according to claim 1, characterized in that: The upper end of the ventilation pipe protrudes from the top of the operation table.

8. A chemical laboratory bench according to claim 1, characterized in that: A grille is arranged at the end of the upper end of the ventilation pipe.

9. A chemical laboratory bench according to claim 1, characterized in that: Air supply ports are arranged on the left and right side walls of the fume hood, and the air supply ports are arranged close to the top of the operation table.

10. A chemical laboratory bench according to claim 9, characterised in that: Fans are arranged on the air supply ports, and the air outlets of the fans are directed to the inside of the fume hood.

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