Laboratory ventilation cabinet

Abstract

The utility model discloses a laboratory fume cupboard which comprises a supporting base and a cupboard body, an installation base is arranged between the inner walls of two sliding rails in a sliding mode, a ventilation groove is formed in the middle of the top end of the installation base, ventilation fans are arranged at the two ends of the inner wall of the ventilation groove, and a groove is formed in the middle of the top end of the cupboard body. A plurality of first through holes are formed in the bottom of the inner wall of the groove at equal intervals, and a sealing gasket is fixedly arranged in the middle of the bottom of the mounting base. According to the ventilation cabinet disclosed by the utility model, the sealing washer is in close contact with the groove, so that gas generated in an experiment in the cabinet body and air entering from the outside cannot leak from the ventilation cabinet; fixing pins at the two ends are pulled to enable the mounting base to lose limit, the mounting base can be detached from the cabinet body to maintain and replace parts at the upper end of the cabinet body, replacement operation can be carried out in a laboratory, experimental samples and equipment cannot be damaged due to collision, and the use safety of the device is improved.

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] The most important function of the 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 spread of pollutants in the experiment to the laboratory, fume hoods must be used near the pollution source. The structure of the fume hood is up and down, with exhaust holes on the top for installing fans, and the lower cabinet adopts the style of experimental side tables. With the development of modern science and technology, in order to better use it in laboratory experiments, the functions of such fume hoods are constantly being improved, making them more convenient to use.

[0003] In view of this, Chinese patent No. CN212733501U proposes a laboratory fume hood, which installs an exhaust fan in the inner cavity of the suction hood and supports the exhaust fan with a telescopic rod. The telescopic rod can be used to adjust the upper and lower heights of the exhaust fan, thereby realizing the function of adjusting the suction force in the cabinet and avoiding the problem that the air volume of traditional laboratory fume hoods cannot be adjusted. However, after long-term use, the fume hood in the above technical solution cannot be disassembled and assembled. When maintaining the ventilation structure and replacing parts, the staff can only disassemble and repair it on the cabinet. The area of ​​the laboratory is generally limited, and many dangerous experimental samples and equipment are placed therein. If the disassembly and maintenance can only be performed on the cabinet, it is easy to cause collisions and damage to surrounding samples and equipment, causing irreversible harm. Therefore, a detachable ventilation structure is needed. Utility Model Content

[0004] In order to solve the above problems, the purpose of the utility model is to provide a laboratory fume hood to solve the problems raised in the above background technology.

[0005] To achieve the above object, the utility model proposes a laboratory fume hood, comprising a supporting base and a cabinet body, wherein a detachable ventilation mechanism is arranged at the upper end of the cabinet body, and a sealing mechanism with a smoke alarm function is arranged inside the cabinet body;

[0006] The detachable ventilation mechanism includes slide rails fixed on both sides of the top of the cabinet, a mounting base is slidably provided between the inner walls of the two slide rails, a ventilation slot is provided in the middle position of the top of the mounting base, ventilation fans are provided at both ends of the inner wall of the ventilation slot, a groove is provided in the middle position of the top of the cabinet, a plurality of first through holes are equidistantly provided at the bottom of the inner wall of the groove, a sealing gasket is fixedly provided in the middle position of the bottom of the mounting base, a plurality of second through holes are equidistantly provided at the bottom of the mounting base at the middle position of the sealing gasket, and the outer wall of the sealing gasket is in contact with the inner wall of the groove.

[0007] In one example, fixing pins are inserted into both sides of the outer wall of the cabinet body, and the outer walls at one end of the two fixing pins are respectively inserted into the inner walls of the two slide rails, the outer walls at one end of the two fixing pins are respectively sleeved with springs, and one end of the two springs are respectively fixedly connected to the two sides of the cabinet body, and the outer wall at one end of the ventilation slot is sleeved with a sealing strip.

[0008] In one example, the sealing mechanism with smoke alarm function includes a supporting beam fixed to one end of the inner wall of the cabinet, a first tempered glass plate is fixed to one side of the top of the supporting beam, and an alarm is fixed to the edge of one side of the cabinet.

[0009] In one example, magnetic strips are fixed on both sides of the bottom of the support beam and on the edge of one side of the inner wall of the cabinet, a connecting groove is opened in the middle position of the top of the support beam, and a smoke sensor is fixed on one side of the support beam.

[0010] In one example, a second tempered glass plate is inserted into the inner wall of the connecting groove, and a metal bracket is fixed to the bottom of the second tempered glass plate.

[0011] In one example, a switch panel is fixedly provided on one side of the support base, and the ventilation fan and the alarm are electrically connected to an external power supply through the switch panel.

[0012] The laboratory fume hood proposed by the utility model can bring the following beneficial effects:

[0013] 1. A laboratory fume hood. When the fume hood is used, the fan in the ventilation slot is started to rotate for ventilation, while the interior of the cabinet is ventilated and heat is dissipated. The sealing gasket and the groove are in close contact so that the gas generated by the experiment in the cabinet and the air entering from the outside will not leak from the fume hood. When the ventilation equipment needs to be maintained later, the fixing pins at both ends are pulled so that the mounting base loses its limit and it can be removed from the cabinet for parts maintenance and replacement. The replacement operation can be carried out outside the laboratory, and experimental samples and equipment will not be damaged due to collision, thereby improving the safety of the device.

[0014] 2. In the laboratory fume hood, during the experiment, the metal bracket is pulled down with the second tempered glass plate to close the discharge end of the cabinet. At the same time, the metal bracket is fixed by the magnetic strip at the lower end. If an open flame is generated during the experiment, the smoke generated will contact the smoke sensor to trigger the alarm. The staff can deal with it in the first time to prevent the occurrence of fire accidents and improve the protection of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

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

[0017] Figure 2 This is a schematic diagram of the internal structure of the ventilation mechanism of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the bottom of the installation base of the utility model;

[0019] Figure 4 It is a schematic diagram of the overall structure of the cabinet of the utility model;

[0020] Figure 5 It is a structural schematic diagram of the back side of the supporting beam of the utility model.

[0021] In the figure: 1. Support base; 2. Cabinet; 3. Slide rail; 4. Mounting base; 5. Ventilation slot; 6. Ventilation fan; 7. Groove; 8. First through hole; 9. Sealing gasket; 10. Second through hole; 11. Fixing pin; 12. Spring; 13. Sealing strip; 14. Support beam; 15. First tempered glass plate; 16. Alarm; 17. Magnetic strip; 18. Connecting slot; 19. Smoke sensor; 20. Second tempered glass plate; 21. Metal bracket. DETAILED DESCRIPTION

[0022] In order to more clearly illustrate the overall concept of the utility model, a detailed description is given below in the form of examples in conjunction with the accompanying drawings.

[0023] The examples are as follows:

[0024] The utility model provides Figure 1-5 A laboratory fume hood shown includes a support base 1 and a cabinet body 2, and a detachable ventilation mechanism is provided at the upper end of the cabinet body 2;

[0025] The detachable ventilation mechanism includes a slide rail 3 fixed on both sides of the top of the cabinet 2, a mounting base 4 is slidably provided between the inner walls of the two slide rails 3, a ventilation slot 5 is provided at the middle position of the top of the mounting base 4, and ventilation fans 6 are provided at both ends of the inner wall of the ventilation slot 5, a groove 7 is provided at the middle position of the top of the cabinet 2, and a plurality of first through holes 8 are provided at equal distances at the bottom of the inner wall of the groove 7, a sealing gasket 9 is fixedly provided at the middle position of the bottom of the mounting base 4, and a plurality of second through holes 10 are provided at equal distances at the bottom of the mounting base 4 located in the middle position of the sealing gasket 9, and the sealing gasket The outer wall of 9 contacts the inner wall of the groove 7. When the mounting base 4 is installed in the slide rail 3, the sealing gasket 9 at the lower end will be squeezed. Since the sealing gasket 9 is generally made of rubber, it will be compressed when squeezed. When the mounting base 4 slides to the upper end of the groove 7, it will bounce into the groove 7 and contact with the inner wall of the groove 7 to achieve sealing. When the mounting base 4 is removed, the fixing pin 11 can be removed and it can be directly pulled out. When the fume hood is installed, the ventilation slot 5 at the upper end is connected to the waste gas treatment equipment in the laboratory, and the sealing strip 13 at the upper end thereof plays a role in sealing and preventing air leakage.

[0026] Furthermore, fixing pins 11 are inserted into both sides of the outer wall of the cabinet 2, and the outer walls of one end of the two fixing pins 11 are respectively inserted into the inner walls of the two slide rails 3, and the outer walls of one end of the two fixing pins 11 are respectively sleeved with springs 12, and one end of the two springs 12 are respectively fixedly connected to the two sides of the cabinet 2, and the outer wall of one end of the ventilation slot 5 is sleeved with a sealing strip 13, and the ends of the two fixing pins 11 inserted into the slide rail 3 are spherical, and the springs 12 can be stretched and contracted into the interior of the cabinet 2 when squeezed, and when the mounting base 4 is fully inserted into the slide rail 3, the fixing pins 11 pop out and just touch the side of the mounting base 4, so that it is squeezed and remains stable;

[0027] Furthermore, the sealing mechanism with smoke alarm function includes a supporting beam 14 fixed to one end of the inner wall of the cabinet 2, a first tempered glass plate 15 is fixed to one side of the top of the supporting beam 14, an alarm 16 is fixed to the edge of one side of the cabinet 2, and the upper end of the first tempered glass plate 15 is fixedly connected to the upper side of the inner wall of the cabinet 2.

[0028] Magnetic strips 17 are fixedly provided on both sides of the bottom of the supporting beam 14 and on the edge of one side of the inner wall of the cabinet 2. A connecting groove 18 is provided in the middle position of the top of the supporting beam 14. A smoke sensor 19 is fixedly provided on one side of the supporting beam 14. The smoke sensor 19 is electrically connected to the alarm 16. When open flame smoke is sensed, the alarm 16 will be triggered to sound an alarm.

[0029] A second tempered glass plate 20 is inserted into the inner wall of the connecting groove 18, and a metal bracket 21 is fixed to the bottom of the second tempered glass plate 20. The metal bracket 21 is made of metal. When the second tempered glass plate 20 is opened, its upper end is adsorbed to the magnetic strip 17 at the bottom of the supporting beam 14 to fix it. When the cabinet body 2 is closed, its lower end is adsorbed to the magnetic strip 17 at the lower end of the cabinet body 2.

[0030] A switch panel is fixedly provided on one side of the support base 1, and the ventilation fan 6 and the alarm 16 are electrically connected to an external power supply through the switch panel.

[0031] Working principle: When using the laboratory fume hood in this design, first install the mounting base 4 at the upper end of the device on the upper end of the cabinet 2 so that it squeezes the fixing pin 11 until the mounting base 4 is completely installed on the cabinet 2. Then, under the action of the spring 12, one end of the fixing pin 11 is inserted into the inner wall of one end of the two slide rails 3 to limit the mounting base 4 so that it will not fall off the cabinet 2. When using the fume hood, start the ventilation fan 6 in the ventilation slot 5 to rotate for ventilation. At the same time, the inside of the cabinet 2 is ventilated and heat is dissipated through the air exchange between the first through hole 8 and the second through hole 10, and the sealing gasket 9 is in close contact with the groove 7 so that the gas generated by the experiment in the cabinet 2 and the air entering from the outside will not leak from the fume hood. Maintenance is required later When protecting the ventilation equipment, the fixing pins 11 at both ends are pulled to make the mounting base 4 lose its limit, so that it can be removed from the cabinet 2 for maintenance and replacement of the parts on the upper end, and the replacement operation can be carried out outside the laboratory, and the experimental samples and equipment will not be damaged due to collision, thereby improving the safety of the device. In the process of using the fume hood for experiments, the metal bracket 21 is pulled down with the second tempered glass plate 20 to close the discharge end of the cabinet 2. At the same time, the metal bracket 21 is adsorbed and fixed to the magnetic strip 17 at the lower end. If an open flame is generated during the experiment, the smoke generated will contact the smoke sensor 19 to trigger the alarm 16 to sound an alarm, and the staff can deal with it in the first time to prevent the occurrence of fire accidents and improve the protection of the device.

[0032] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0033] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A laboratory fume hood, comprising a support base (1) and a cabinet body (2), characterized in that: A detachable ventilation mechanism is provided at the upper end of the cabinet (2), and a sealing mechanism with a smoke alarm function is provided inside the cabinet (2); The detachable ventilation mechanism comprises a slide rail (3) fixed on both sides of the top of the cabinet (2); a mounting base (4) is slidably provided between the inner walls of the two slide rails (3); a ventilation slot (5) is provided at the middle position of the top of the mounting base (4); ventilation fans (6) are provided at both ends of the inner wall of the ventilation slot (5); a groove (7) is provided at the middle position of the top of the cabinet (2); a plurality of first through holes (8) are provided at equal distances at the bottom of the inner wall of the groove (7); a sealing gasket (9) is fixedly provided at the middle position of the bottom of the mounting base (4); a plurality of second through holes (10) are provided at equal distances at the bottom of the mounting base (4) located at the middle position of the sealing gasket (9); and the outer wall of the sealing gasket (9) contacts the inner wall of the groove (7).

2. A laboratory fume hood according to claim 1, characterized in that: Fixed pins (11) are inserted into both sides of the outer wall of the cabinet (2), and the outer walls of one end of the two fixed pins (11) are respectively inserted into the inner walls of the two slide rails (3), the outer walls of one end of the two fixed pins (11) are respectively sleeved with springs (12), and one end of the two springs (12) is respectively fixedly connected to the two sides of the cabinet (2), and the outer wall of one end of the ventilation slot (5) is sleeved with a sealing strip (13).

3. A laboratory fume hood according to claim 1, characterized in that: The sealing mechanism with smoke alarm function comprises a supporting beam (14) fixed to one end of the inner wall of the cabinet (2), a first tempered glass plate (15) is fixedly provided on one side of the top end of the supporting beam (14), and an alarm (16) is fixedly provided on the edge of one side of the cabinet (2).

4. A laboratory fume hood according to claim 3, characterized in that: Magnetic strips (17) are fixedly provided on both sides of the bottom of the supporting crossbeam (14) and at the edge of one side of the inner wall of the cabinet (2), a connecting groove (18) is provided in the middle of the top of the supporting crossbeam (14), and a smoke sensor (19) is fixedly provided on one side of the supporting crossbeam (14).

5. A laboratory fume hood according to claim 4, characterized in that: A second tempered glass plate 2 (0) is inserted into the inner wall of the connecting groove (18), and a metal bracket (21) is fixedly provided at the bottom of the second tempered glass plate (20).

6. A laboratory fume hood according to claim 3, characterized in that: A switch panel is fixedly provided on one side of the support base (1), and the ventilation fan (6) and the alarm (16) are electrically connected to an external power supply via the switch panel.

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