Laboratory fume hood exhaust device

Abstract

The utility model discloses a laboratory fume hood exhaust device which comprises a pipe body, installation flanges are fixedly installed on the outer sides of the two ends of the pipe body, grids are movably installed at the two ends of the pipe body, a fixing frame is fixedly installed in the pipe body, supporting rings are fixedly installed at the opposite ends of the fixing frame, and two supports are fixedly installed on the inner sides of the supporting rings. A motor is fixedly installed on the inner sides of the two supports, a flow guide cone is fixedly installed at one end of the motor, a rotating shaft is fixedly installed at the output end of the motor, fan blades are fixedly installed on the outer side of the rotating shaft, a flow guide frame is fixedly installed in one end of the pipe body, a plurality of shaft seats are fixedly installed at the top and the bottom of an inner cavity of the pipe body, and rotating rods movably sleeve the inner sides of the shaft seats. And through the arranged control box, an operator can conveniently check the control quality at the exhaust position, reference is facilitated, the air quality is conveniently judged, ventilation and exhaust are judged and controlled, and the use effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of laboratory ventilation equipment, in particular to an exhaust device for a laboratory fume hood. Background Art

[0002] A laboratory is a place where experiments are conducted. Ventilation is a technology that uses natural or mechanical methods to allow wind to pass through a room or a sealed environment without obstruction to create a hygienic, safe and suitable air environment. Frequent ventilation can improve indoor air quality and is good for health.

[0003] During the work in the laboratory, the cleanliness of the environment and the quality of the air often have a certain impact on some experiments, and ventilation is required due to the demand for air quality. However, traditional fume hood exhaust equipment is generally just simple ventilation and does not have the function of indoor control quality detection. In addition, there may be air flow backflow during exhaust, thus affecting the air quality. Based on this, we propose a laboratory fume hood exhaust device. Utility Model Content

[0004] The utility model aims to provide an exhaust device for a laboratory fume hood to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an exhaust device for a laboratory fume hood, comprising a pipe body, the outer sides of both ends of the pipe body are fixedly installed with mounting flanges, both ends of the pipe body are movably installed with grids, a fixing frame is fixedly installed inside the pipe body, a support ring is fixedly installed at the opposite end of the fixing frame, two brackets are fixedly installed on the inner side of the support ring, a motor is fixedly installed on the inner side of the two brackets, a guide cone is fixedly installed on one end of the motor, a rotating shaft is fixedly installed on the output end of the motor, a fan blade is fixedly installed on the outer side of the rotating shaft, a guide frame is fixedly installed inside one end of the pipe body, and the Several shaft seats are fixedly installed on the top and bottom of the inner cavity of the tube body, a rotating rod is movably sleeved on the inner side of the shaft seat, a sealing L-plate is fixedly installed on the outer side of the rotating rod, a plastic plate is fixedly installed on the outer side of the rotating rod, torsion springs are sleeved on the outer sides of both ends of the rotating rod, a control box is fixedly installed inside the tube body, metal meshes are movably installed on both sides of the control box, a carbon dioxide sensor is arranged inside the control box, a wireless network component is arranged inside the control box, a power supply is arranged inside the control box, a temperature and humidity sensor is arranged inside the control box, and a PM2.5 detection sensor is arranged inside the control box.

[0006] Preferably, one end of the rotating shaft away from the motor is fixed to the opposite side of the bracket through a bearing.

[0007] Preferably, the triangular surface of the guide frame corresponds to the position of the fan blades, and the gap between the guide frame and the rotating rod corresponds to the size of the plastic plate.

[0008] Preferably, the L end of the sealing L plate is a rubber structure, and the specification and size of the gap at the L end of the sealing L plate are compatible with the specification and size of the plastic plate.

[0009] Preferably, the shaft seats are linearly and evenly distributed inside the tube body, and the top end of the torsion spring is fixed to the bottom ends of the sealing L-plate and the plastic plate through a collar.

[0010] Preferably, a microprocessor is disposed inside the control box.

[0011] Compared with the prior art, the utility model has the following beneficial effects: when the device is in use, the operator first installs the pipe body at the use position of the fume hood through the mounting flange, and after the external power supply is connected, the motor is started, and the rotation of the motor drives the rotating shaft to rotate and forms an airflow through the fan blades, and draws the airflow at one end of the control box to the guide frame. At this time, the airflow pushes the heavier sealing L plate to rotate outward and the plastic plate to rotate inward under the guidance of the guide frame, and drives the rotating rod to open the closed sealing L plate and the plastic plate, and applies a force to the torsion spring. When the airflow stops, the torsion spring will slowly drive the rotating rod to rotate, and reset the sealing L plate and the plastic plate, and continue to restore the closure, so as to organize the airflow from the outside to enter and form the effect of a one-way valve. The overall structure is stable and convenient for airflow guidance.

[0012] Through the control box that is set up, when the air flows through, the air flows in through the metal mesh. At this time, the carbon dioxide sensor, temperature and humidity sensor and PM2.5 detection sensor inside the control box respectively detect various values ​​in the air, and integrate them into the microprocessor, and send them to the receiving end through the wireless network component, so that the operating personnel can check the control quality of the exhaust point for reference, which is convenient for judging the quality of the air, and judging the control of ventilation and emissions, and the use effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the front three-dimensional appearance structure of the utility model.

[0014] Figure 2 It is a schematic diagram of the rear-view stereoscopic appearance structure of the utility model.

[0015] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model from top view.

[0016] Figure 4 For this utility model Figure 3 Enlarged structural diagram at A in the middle.

[0017] Figure 5 This is a schematic diagram of the internal structure of the control box of the utility model.

[0018] In the figure: 1. pipe body; 2. mounting flange; 3. grid; 4. guide frame; 5. fan blades; 6. bracket; 7. motor; 8. control box; 801. carbon dioxide sensor; 802. wireless network component; 803. power supply; 804. temperature and humidity sensor; 805. PM2.5 detection sensor; 806. microprocessor; 9. guide cone; 10. support ring; 11. fixing bracket; 12. rotating shaft; 13. rotating rod; 14. shaft seat; 15. torsion spring; 16. sealing L plate; 17. plastic plate; 18. metal mesh. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-Figure 5 The utility model provides a technical solution: an exhaust device for a laboratory fume hood, comprising a pipe body 1, mounting flanges 2 are fixedly installed on the outer sides of both ends of the pipe body 1, grids 3 are movably installed on both ends of the pipe body 1, a fixing frame 11 is fixedly installed inside the pipe body 1, a support ring 10 is fixedly installed on the opposite end of the fixing frame 11, two brackets 6 are fixedly installed on the inner side of the support ring 10, a motor 7 is fixedly installed on the inner side of the two brackets 6, a guide cone 9 is fixedly installed on one end of the motor 7, a rotating shaft 12 is fixedly installed on the output end of the motor 7, a fan blade 5 is fixedly installed on the outer side of the rotating shaft 12, a guide frame 4 is fixedly installed inside one end of the pipe body 1, and the top and bottom of the inner cavity of the pipe body 1 are fixedly installed. A plurality of shaft seats 14 are fixedly installed, a rotating rod 13 is movably sleeved on the inner side of the shaft seat 14, a sealing L-plate 16 is fixedly installed on the outer side of the rotating rod 13, a plastic plate 17 is fixedly installed on the outer side of the rotating rod 13, torsion springs 15 are sleeved on the outer sides of both ends of the rotating rod 13, a control box 8 is fixedly installed inside the tube body 1, metal meshes 18 are movably installed on both sides of the control box 8, a carbon dioxide sensor 801 is arranged inside the control box 8, a wireless network component 802 is arranged inside the control box 8, a power supply 803 is arranged inside the control box 8, a temperature and humidity sensor 804 is arranged inside the control box 8, and a PM2.5 detection sensor 805 is arranged inside the control box 8.

[0021] The working principle of the above technical solution is as follows: when in use, the operator first installs the tube body 1 at the use position of the fume hood through the mounting flange 2, and after the external power supply is connected, the motor 7 is started. The rotation of the motor 7 drives the rotating shaft 12 to rotate and forms an airflow through the fan blades 5, and draws the airflow at one end of the control box 8 to the guide frame 4. At this time, the airflow pushes the heavier sealing L plate 16 to rotate outward and the plastic plate 17 to rotate inward under the guidance of the guide frame 4, and drives the rotating rod 13 to open the closed sealing L plate 16 and the plastic plate 17, and applies a force to the torsion spring 15. When the airflow stops, the torsion spring 15 will slowly drive the rotating rod 13 to rotate, and reset the sealing L plate 16 and the plastic plate 17, and continue to restore the closure, so as to organize the airflow from the outside to enter and form the effect of a one-way valve. The overall structure is stable and convenient for airflow guidance.

[0022] In another embodiment, Figure 3 As shown, one end of the rotating shaft 12 away from the motor 7 is fixed to the opposite side of the bracket 6 through a bearing.

[0023] This is convenient for stabilizing the torque of the rotating shaft 12, so that it is also stable when rotating at high speed, which is convenient for overall stable use.

[0024] In another embodiment, Figure 3 and Figure 4 As shown, the triangular surface of the guide frame 4 corresponds to the position of the fan blade 5 , and the gap between the guide frame 4 and the rotating rod 13 corresponds to the size of the plastic plate 17 .

[0025] The guide frame 4 guides the airflow and provides a rotation space for the plastic plate 17. The space is shorter than the sealing L plate 16, so it can only allow the plastic plate 17 to rotate through, cooperating with the L end of the sealing L plate 16 to prevent it from reversing, further avoiding the backflow of airflow.

[0026] In another embodiment, Figure 3 and Figure 4 As shown, the L end of the sealing L plate 16 is a rubber structure, and the specification and size of the gap at the L end of the sealing L plate 16 are compatible with the specification and size of the plastic plate 17.

[0027] The L end of the sealing L plate 16 can be attached to the outer side of the plastic plate 17. When the outer airflow flows back, the L end of the sealing L plate 16 and the outer end of the plastic plate 17 are attached to form a seal to prevent the airflow from passing through and reduce the backflow.

[0028] In another embodiment, Figure 3 and Figure 4 As shown, the shaft seats 14 are linearly and evenly distributed inside the tube body 1 , and the top end of the torsion spring 15 is fixed to the bottom ends of the sealing L plate 16 and the plastic plate 17 through a collar.

[0029] The shaft seat 14 provides a rotational force for the rotating rod 13 , and the shaft seat 14 can be buried in the inner wall of the tube body 1 , and the torsion spring 15 provides a stable torsional force for the rotating rod 13 , which is convenient for stabilizing the reset position and can indirectly limit the rotation position of the rotating rod 13 .

[0030] In another embodiment, Figure 5 As shown, a microprocessor 806 is disposed inside the control box 8 .

[0031] Through the control box 8 that is set, when the airflow passes through, the airflow enters through the metal mesh 18. At this time, the carbon dioxide sensor 801, the temperature and humidity sensor 804, and the PM2.5 detection sensor 805 inside the control box 8 respectively detect various values ​​in the air, and merge them into the microprocessor 806, and send them to the receiving end through the wireless network component 802, so that the operator can check the control quality of the exhaust, which is convenient for reference, and it is convenient to judge the quality of the air, and judge the control ventilation and emission, and the use effect is good. The input end of the microprocessor 806 is electrically connected to the output end of the carbon dioxide sensor 801, the temperature and humidity sensor 804, and the PM2.5 detection sensor 805 through a wire, and the output end of the microprocessor 806 is electrically connected to the input end of the wireless network component 802 through a wire, and the output end of the power supply 803 is electrically connected to the carbon dioxide sensor 801, the wireless network component 802, the temperature and humidity sensor 804, the PM2.5 detection sensor 805, and the power input end of the microprocessor 806 through a wire to power it.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A laboratory fume hood exhaust device, comprising a tube body (1), characterized in that: The outer sides of both ends of the tube body (1) are fixedly mounted with mounting flanges (2), the two ends of the tube body (1) are movably mounted with grids (3), the interior of the tube body (1) is fixedly mounted with a fixing frame (11), the opposite end of the fixing frame (11) is fixedly mounted with a support ring (10), the inner side of the support ring (10) is fixedly mounted with two brackets (6), the inner sides of the two brackets (6) are fixedly mounted with a motor (7), one end of the motor (7) is fixedly mounted with a guide cone (9), the output end of the motor (7) is fixedly mounted with a rotating shaft (12), the outer side of the rotating shaft (12) is fixedly mounted with a fan blade (5), the interior of one end of the tube body (1) is fixedly mounted with a guide frame (4), the top and bottom of the inner cavity of the tube body (1) are fixedly mounted with a plurality of shaft seats (14), the shaft seats ( A rotating rod (13) is movably sleeved on the inner side of the tube body (14), a sealing L-plate (16) is fixedly installed on the outer side of the rotating rod (13), a plastic plate (17) is fixedly installed on the outer side of the rotating rod (13), torsion springs (15) are sleeved on the outer sides of both ends of the rotating rod (13), a control box (8) is fixedly installed inside the tube body (1), metal meshes (18) are movably installed on both sides of the control box (8), a carbon dioxide sensor (801) is arranged inside the control box (8), a wireless network component (802) is arranged inside the control box (8), a power supply (803) is arranged inside the control box (8), a temperature and humidity sensor (804) is arranged inside the control box (8), and a PM2.5 detection sensor (805) is arranged inside the control box (8).

2. A laboratory fume hood exhaust device according to claim 1, characterized in that: One end of the rotating shaft (12) away from the motor (7) is fixed to the opposite side of the bracket (6) through a bearing.

3. A laboratory fume hood exhaust device according to claim 1, characterized in that: The triangular surface of the guide frame (4) corresponds to the position of the fan blade (5), and the gap between the guide frame (4) and the rotating rod (13) corresponds to the size of the plastic plate (17).

4. A laboratory fume hood exhaust device according to claim 1, characterized in that: The L end of the sealing L plate (16) is a rubber structure, and the specification and size of the gap at the L end of the sealing L plate (16) are compatible with the specification and size of the plastic plate (17).

5. A laboratory fume hood exhaust device according to claim 1, characterized in that: The shaft seats (14) are evenly distributed linearly inside the tube body (1), and the top end of the torsion spring (15) is fixed to the bottom ends of the sealing L plate (16) and the plastic plate (17) via a sleeve ring.

6. A laboratory fume hood exhaust device according to claim 1, characterized in that: A microprocessor (806) is arranged inside the control box (8).

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