CN214289919U

CN214289919U - Wind speed control device of laboratory ventilation cabinet

Info

Publication number: CN214289919U
Application number: CN202120066929.XU
Authority: CN
Inventors: 任芳园; 崔智博
Original assignee: Shenyang Baimu Technology Co ltd
Current assignee: Shenyang Baimu Technology Co ltd
Priority date: 2021-01-11
Filing date: 2021-01-11
Publication date: 2021-09-28
Anticipated expiration: 2031-01-11

Abstract

The utility model discloses a laboratory fume chamber wind speed control device, including fume chamber, air sensor, control box, converter and the device that opens and shuts, the both sides fixedly connected with bearing plate of fume chamber inner wall, the top of bearing plate is provided with the air exhauster, the output intercommunication of air exhauster has the blast pipe, the input intercommunication of air exhauster has the exhaust tube, the both sides of fume chamber inner wall just are located fixedly connected with mounting panel under the bearing plate, one side at mounting panel top is provided with air sensor, one side at mounting panel top just is located one side of air sensor is provided with the control box. The utility model discloses an air sensor sends the big or small data of intake to the control box, then the control box will carry out the action order and send the converter to in order to reach the effect of control intake size, has guaranteed that the device can discharge the harmful gas in the cabinet, opens and shuts the piece through rotating the axis of rotation, prevents dust or snake worm rat ant entering equipment.

Description

Wind speed control device of laboratory ventilation cabinet

Technical Field

The utility model relates to a laboratory ventilation equipment technical field specifically is a laboratory fume chamber wind speed control device.

Background

The laboratory is the special place that is used for accomplishing various research experiments, and laboratory staff often need use the chemical reagent that all kinds of corrosivity are stronger in experiment or inspection process, in addition, also can form the production very many poisonous and harmful gas at the in-process of experiment, it is internal to be inhaled by scientific research laboratory staff easily, will cause great harm to its healthy, for not only reducing the harm of various poisonous and harmful gas to the laboratory staff effectively, can guarantee the normal clear of experiment or inspection work again, set up the fume chamber in the laboratory usually.

The existing laboratory ventilation cabinet wind speed control device has the condition that the wind speed is unstable, toxic and harmful gases cannot be effectively removed, the health of laboratory personnel is harmed, and the existing laboratory ventilation cabinet wind speed control device is opened, so that dust, impurities and even snake, insect, mouse and ant enter equipment from an air inlet or an air outlet, and the expensive ventilation cabinet is possibly damaged.

Therefore, it is necessary to provide a wind speed control device for a laboratory fume hood to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a laboratory fume chamber wind speed control device to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a laboratory fume hood wind speed control device comprises a fume hood, an air quantity sensor, a control box, a frequency converter and an opening and closing device, wherein bearing plates are fixedly connected to two sides of the inner wall of the fume hood, an exhaust fan is arranged at the top of each bearing plate, the output end of the exhaust fan is communicated with an exhaust pipe, the input end of the exhaust fan is communicated with an exhaust pipe, mounting plates are fixedly connected to two sides of the inner wall of the fume hood and are positioned right below the bearing plates, the air quantity sensor is arranged on one side of the top of each mounting plate, the control box is arranged on one side of the top of each mounting plate and is positioned on one side of the air quantity sensor, the frequency converter is arranged on one side of the top of each mounting plate and is positioned on one side of the control box, an exhaust fan is arranged at the bottom of the inner wall of the fume hood, the input end of the exhaust fan is communicated with an exhaust pipe, and the output end of the exhaust fan is communicated with the exhaust pipe, the device that opens and shuts includes the axis of rotation, the bottom of axis of rotation runs through the fume chamber and extends to the inside of fume chamber, the fixed surface of axis of rotation is connected with drive gear, the top fixedly connected with inner ring of fume chamber inner wall, the drive gear meshing has driven gear, driven gear's top is rotated and is connected with the connecting rod, the one end of connecting rod is rotated and is connected with the piece that opens and shuts, open and shut one side at piece top with the inner loop bottom is rotated and is connected.

Preferably, the inside of fume chamber just is located be provided with the dust screen directly over the piece that opens and shuts, the equal fixedly connected with support frame in one side of fume chamber inner wall and the both sides of bottom, the top of support frame all is provided with the fixed block.

Preferably, the bottom fixedly connected with base of fume chamber, the top fixedly connected with disc of axis of rotation, the surface of axis of rotation just is located be provided with the sealing washer directly over drive gear.

Preferably, the bottom of blast pipe runs through the bearing plate just extends to the bottom of bearing plate, the one end of exhaust pipe runs through the mounting panel just extends to the top of mounting panel, the bottom of exhaust pipe runs through in proper order the fume chamber with the base just extends to the bottom of base, the bottom of exhaust pipe is provided with the valve.

Preferably, the air volume sensor is electrically connected with the control box through a wire, and the control box is electrically connected with the frequency converter through a wire.

Compared with the prior art, the beneficial effects of the utility model are that: the wind speed control device of the laboratory fume hood drives the driving gear to rotate by rotating the rotating shaft so as to drive the driven gear to rotate, drives the connecting rod to rotate by rotating the driven gear so as to drive the opening and closing sheet to be opened and become an open state, effectively prevents dust from entering through the dustproof net, extracts harmful gas through the exhaust fan, transmits the data of the air intake quantity to the control box through the air volume sensor, then the control box calculates the data and the preset value and transmits an execution action command to the frequency converter so as to achieve the effect of controlling the air intake quantity, discharges the harmful gas by starting the exhaust fan, ensures that the device can discharge the harmful gas in the cabinet, ensures the health of experimenters, drives the driving gear to rotate by reversely rotating the rotating shaft when not used, then drives the driven gear to reversely rotate so as to close the opening and closing sheet, the possibility that dust, even snake, insect, rat and ant enter the equipment from the air inlet or the ventilation opening to damage the device is prevented, the device is effectively protected, and the service life of the device is prolonged.

Drawings

Fig. 1 is a schematic structural diagram of a preferred embodiment of a wind speed control device for a laboratory fume hood according to the present invention;

FIG. 2 is a schematic top view of the opening and closing device shown in FIG. 1;

fig. 3 is a schematic plan view of the structure of the hood of fig. 1.

In the figure: 1. a fume hood; 2. a bearing plate; 3. an exhaust fan; 4. an air exhaust pipe; 5. an exhaust pipe; 6. mounting a plate; 7. an air quantity sensor; 8. a control box; 9. a frequency converter; 10. an exhaust fan; 11. an exhaust pipe; 12. an exhaust duct; 13. a support frame; 14. a fixed block; 15. a rotating shaft; 16. a drive gear; 17. a seal ring; 18. a driven gear; 19. a connecting rod; 20. an inner ring; 21. opening and closing the sheet; 22. a base; 23. a dust screen; 24. a disk.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides an embodiment: a laboratory fume hood wind speed control device comprises a fume hood 1, an air quantity sensor 7, a control box 8, a frequency converter 9 and an opening and closing device, wherein bearing plates 2 are fixedly connected to two sides of the inner wall of the fume hood 1, an exhaust fan 3 is arranged at the top of each bearing plate 2, an exhaust pipe 5 is communicated with the output end of the exhaust fan 3, an exhaust pipe 4 is communicated with the input end of the exhaust fan 3, mounting plates 6 are fixedly connected to two sides of the inner wall of the fume hood 1 and are located under the bearing plates 2, the air quantity sensor 7 is arranged on one side of the top of each mounting plate 6, the control box 8 is arranged on one side of the top of each mounting plate 6 and on one side of the air quantity sensor 7, the frequency converter 9 is arranged on one side of the top of each mounting plate 6 and on one side of the corresponding control box 8, an exhaust fan 10 is arranged at the bottom of the inner wall of the fume hood 1, and the input end of each exhaust fan 10 is communicated with an exhaust pipe 11, the output intercommunication of exhaust fan 10 has exhaust pipe 12, the device that opens and shuts includes axis of rotation 15, the bottom of axis of rotation 15 runs through fume chamber 1 and extends to the inside of fume chamber 1, the fixed surface of axis of rotation 15 is connected with drive gear 16, the top fixedly connected with inner ring 20 of fume chamber 1 inner wall, drive gear 16 meshes has driven gear 18, driven gear 18's top is rotated and is connected with connecting rod 19, the one end of connecting rod 19 is rotated and is connected with the piece 21 that opens and shuts, the one side at the piece 21 top of opening and shutting with the bottom of inner ring 20 is rotated and is connected, air sensor 7 is located under the blast pipe 5, the shape of the piece 21 that opens and shuts is heterotypic, the quantity of the piece 21 that opens and shuts is five, the quantity of connecting rod 19 is five, the piece 21 closed state that opens and shuts contacts each other and forms a circular, the air quantity sensor 7, the control box 8, the frequency converter 9, the exhaust fan 3 and the exhaust fan 10 are all connected with an external power supply and are provided with switches for controlling the power supply.

The inside of fume chamber 1 just is located be provided with dust screen 23 directly over the piece 21 that opens and shuts, the equal fixedly connected with support frame 13 in one side of 1 inner wall of fume chamber and the both sides of bottom, the top of support frame 13 all is provided with fixed block 14, a plurality of fixed blocks 14 have the supporting role to the pipeline, the position of dust screen 23 is located directly over driven gear 18, and just to the top of exhaust tube 4.

Bottom fixedly connected with base 22 of fume chamber 1, the top fixedly connected with disc 24 of axis of rotation 15, the surface of axis of rotation 15 just is located be provided with sealing washer 17 directly over drive gear 16, sealing washer 17 has dustproof effect.

The bottom of blast pipe 5 is run through bearing plate 2 and extend to the bottom of bearing plate 2, the one end of exhaust column 11 is run through mounting panel 6 and extend to the top of mounting panel 6, the bottom of exhaust pipe 12 runs through in proper order fume chamber 1 with base 22 just extends to the bottom of base 22, the bottom of exhaust pipe 12 is provided with the valve.

The air volume sensor 7 is electrically connected with the control box 8 through a wire, and the control box 8 is electrically connected with the frequency converter 9 through a wire.

The working principle is as follows: when the air intake control device is used, the rotating disc 24 drives the rotating shaft 15 to rotate so as to drive the driving gear 16 to rotate, the driving gear 16 is meshed with the driven gear 18, the driving gear 16 drives the driven gear 18 to rotate, the driven gear 18 rotates so as to drive the connecting rod 19 to rotate, then the connecting rod 19 drives one end of the opening and closing sheet 21 to pull in the rotating direction, the other end of the opening and closing sheet 21 is fixed on the inner ring 20, so that the opening and closing sheet 21 is opened to be in an open state, at the moment, the exhaust fan 3 is started, then the exhaust fan 3 extracts harmful gas through the exhaust pipe 4 and then exhausts the harmful gas through the exhaust pipe 5, at the moment, the air volume sensor 7 senses air volume, the air volume sensor 7 transmits the size data of intake air to the control box 8, then the control box 8 calculates the data and preset values and transmits an execution action command to the frequency converter 9 to achieve the effect of controlling the size of intake air volume, the wind speed is constantly kept at zero point five meters per second, then the exhaust fan 10 is started, the exhaust fan 10 extracts harmful gas through the exhaust pipe 11, the harmful gas is exhausted through the exhaust pipe 12, when the exhaust fan is not used, the disc 24 can be rotated reversely to drive the rotating shaft 15 to rotate, then the rotating shaft 15 drives the driving gear 16 to rotate, and then the driven gear 18 is driven to rotate reversely, so that the opening and closing piece 21 is closed.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a laboratory fume chamber wind speed control device, includes fume chamber (1), air sensor (7), control box (8), converter (9) and opens and shuts the device, its characterized in that: the novel ventilating hood is characterized in that bearing plates (2) are fixedly connected to two sides of the inner wall of the ventilating hood (1), an exhaust fan (3) is arranged at the top of each bearing plate (2), an exhaust pipe (5) is communicated with the output end of each exhaust fan (3), an exhaust pipe (4) is communicated with the input end of each exhaust fan (3), a mounting plate (6) is fixedly connected to two sides of the inner wall of the ventilating hood (1) and is located under the bearing plates (2), an air quantity sensor (7) is arranged on one side of the top of the mounting plate (6), a control box (8) is arranged on one side of the top of the mounting plate (6) and on one side of the air quantity sensor (7), a frequency converter (9) is arranged on one side of the top of the mounting plate (6) and on one side of the control box (8), an exhaust fan (10) is arranged at the bottom of the inner wall of the ventilating hood (1), and an exhaust pipe (11) is communicated with the input end of the exhaust fan (10), the output intercommunication of exhaust fan (10) has exhaust pipe (12), the device that opens and shuts includes axis of rotation (15), the bottom of axis of rotation (15) is run through fume chamber (1) and extend to the inside of fume chamber (1), the fixed surface of axis of rotation (15) is connected with drive gear (16), the top fixedly connected with inner ring (20) of fume chamber (1) inner wall, drive gear (16) meshing has driven gear (18), the top of driven gear (18) is rotated and is connected with connecting rod (19), the one end of connecting rod (19) is rotated and is connected with and opens and shut piece (21), open and shut one side at piece (21) top with the bottom of inner ring (20) is rotated and is connected.

2. The laboratory fume hood wind speed control device according to claim 1, wherein: the inside of fume chamber (1) just is located be provided with dust screen (23) directly over the piece that opens and shuts (21), the equal fixedly connected with support frame (13) in one side of fume chamber (1) inner wall and the both sides of bottom, the top of support frame (13) all is provided with fixed block (14).

3. The laboratory fume hood wind speed control device according to claim 1, wherein: the bottom fixedly connected with base (22) of fume chamber (1), the top fixedly connected with disc (24) of axis of rotation (15), the surface of axis of rotation (15) just is located be provided with sealing washer (17) directly over drive gear (16).

4. The laboratory fume hood wind speed control device of claim 3, wherein: the bottom of blast pipe (5) is run through bearing plate (2) and extend to the bottom of bearing plate (2), the one end of exhaust column (11) is run through mounting panel (6) and extend to the top of mounting panel (6), the bottom of exhaust pipe (12) is run through in proper order fume chamber (1) with base (22) and extend to the bottom of base (22), the bottom of exhaust pipe (12) is provided with the valve.

5. The laboratory fume hood wind speed control device according to claim 1, wherein: the air volume sensor (7) is electrically connected with the control box (8) through a wire, and the control box (8) is electrically connected with the frequency converter (9) through a wire.