A laboratory emergency exhaust fan

Abstract

The utility model discloses a laboratory emergency exhaust fan, which is applied in the laboratory field. The utility model moves a pulling block to disengage the clamping rod from the clamping hole, and then the fixing rod is disengaged from the fixing hole under the action of a second spring, and the fixing frame is disassembled for maintenance. After the maintenance is completed, the fixing frame is installed into a cylinder body, and the fixing rod is moved to be clamped with the fixing hole. The clamping rod is clamped with the clamping hole under the action of a first spring to fix it, and the maintenance is completed, thereby achieving the purpose of facilitating maintenance, reducing the workload, and improving the efficiency of maintenance. The utility model drives a toothed disc to rotate through the rotation of a first motor, and the rotation of the toothed disc causes the gear to reciprocate, and the reciprocating rotation drives the rotating shaft to reciprocate, and the reciprocating rotation of the rotating shaft drives the cylinder to reciprocate, and the reciprocating rotation of the cylinder drives the exhaust mechanism to reciprocate, so that the purpose of shaking the head to exhaust air is achieved, the range of exhaust air is increased, and the efficiency of exhaust air is improved.

Description

Technical Field

[0001] The utility model relates to the field of laboratories, in particular to an emergency exhaust fan for laboratories. Background Art

[0002] At present, a Chinese utility model with announcement number CN205669501U discloses an exhaust fan, including a housing, a motor, a fan blade and a mounting frame, wherein the motor is connected to the fan blade in a transmission manner, the motor is arranged on the mounting frame, the motor, the fan blade and the mounting frame are all located in the housing, and the mounting frame is detachably connected to the housing. The exhaust fan adopts a mounting frame to detachably install the motor in the housing, so that the motor and the fan blade are easy to disassemble, thereby facilitating maintenance, cleaning and replacement of the motor and the fan; the housing is made of durable materials such as stainless steel, so that it has a long service life and is easy to clean. The exhaust fan of the utility model has the advantages of convenient maintenance, cleaning, replacement of the motor and the fan, and simple structure.

[0003] The existing exhaust fans are not easy to maintain. After being used for a long time, the exhaust fans need to be maintained, and the fan blades and the motor need to be disassembled. The motor and the fan blades are installed on a fixing frame, and the fixing frame and the shell are fixed by multiple bolts. When disassembling and assembling them, tools are needed to disassemble and assemble them. The disassembly and assembly process is relatively cumbersome, which increases the workload and reduces the efficiency of maintenance. The exhaust fans do not have the function of shaking their heads. Generally, the exhaust fans are installed on the walls of the laboratories, which results in the direction of the exhaust fans being fixed. When exhausting, the exhaust fans can only be discharged in one direction, which causes the discharged indoor gas to be more concentrated and difficult to dissipate quickly, affecting the fluidity and reducing the exhaust efficiency. In order to solve the above-mentioned problems, we propose a laboratory emergency exhaust fan. Utility Model Content

[0004] The utility model aims to provide a laboratory emergency exhaust fan, which has the advantages of being easy to maintain and having a shaking head function.

[0005] The above-mentioned technical purpose of the utility model is achieved through the following technical solutions: a laboratory emergency exhaust fan comprises a fixed shell, the inner wall of the fixed shell is rotatably connected with a rotating shaft, a cylinder is bolted between the rotating shafts, the inner wall of the cylinder is slidably sleeved with a fixing frame, the surface of the fixing frame is provided with an exhaust mechanism, the inner wall of the cylinder is slidably sleeved with a fixing rod, the surface of the fixing frame is provided with a fixing hole, and the fixing rod is clamped with the fixing hole, the inner wall of the cylinder is slidably sleeved with a clamping rod, the surface of the clamping rod is fixedly sleeved with a first spring, the surface of the fixing rod is clamped with a clamping hole, and the clamping rod is clamped with the clamping hole, the bottom of the fixed shell is bolted with a shell, the bottom of the shell is bolted with a first motor, the output end of the first motor extends to the interior of the shell and is fixedly sleeved with a toothed disk, the inner wall of the toothed disk is meshed with a gear, and the axis of the gear is fixedly sleeved with the rotating shaft at the bottom.

[0006] By adopting the above technical scheme, the pulling block is moved to disengage the clamping rod from the clamping hole, and then the fixing rod is disengaged from the fixing hole under the action of the second spring, and the fixing frame is disassembled for maintenance. After the maintenance is completed, the fixing frame is installed into the cylinder body, and the fixing rod is moved to engage with the fixing hole. The clamping rod is engaged with the clamping hole under the action of the first spring to fix it, and the maintenance is completed, thereby achieving the purpose of facilitating maintenance, reducing the workload, and improving the efficiency of maintenance. The first motor drives the gear plate to rotate, and the rotation of the gear plate causes the gear to reciprocate, and the reciprocating rotation drives the rotating shaft to reciprocate, and the reciprocating rotation of the rotating shaft drives the cylinder to reciprocate, and the reciprocating rotation of the cylinder drives the exhaust mechanism to reciprocate, so that the purpose of shaking the head to exhaust can be achieved, the range of exhaust is increased, and the efficiency of exhaust is improved.

[0007] The utility model is further configured as follows: the exhaust mechanism comprises a second motor, the second motor is bolted to the surface of the fixing frame, and the output end of the second motor passes through the fixing frame and is fixedly sleeved with a fan blade.

[0008] By adopting the above technical solution and arranging an exhaust mechanism, exhaust is facilitated.

[0009] The utility model is further configured as follows: one end of the clamping rod is bolted with a pulling block.

[0010] By adopting the above technical solution and arranging the pulling block, it is convenient to move the clamping rod.

[0011] The utility model is further configured as follows: a second spring is sleeved on the surface of the fixing rod.

[0012] By adopting the above technical solution and providing the second spring, the fixing rod can be easily separated from the fixing hole.

[0013] The utility model is further configured as follows: a protective net is fixedly sleeved on the inner wall of the cylinder.

[0014] The above technical solution is adopted to prevent debris from entering by setting up a protective net.

[0015] The utility model is further configured as follows: a protective shell is bolted to the bottom of the shell, and the first motor is located inside the protective shell.

[0016] By adopting the above technical solution, the first motor is protected by providing a protective shell.

[0017] The utility model is further configured as follows: a mounting plate is bolted to the surface of the fixing shell.

[0018] By adopting the above technical solution and providing a mounting plate, installation and fixing are facilitated.

[0019] In summary, the utility model has the following beneficial effects:

[0020] 1. The utility model moves the pull block to disengage the clamping rod from the clamping hole, and then the fixing rod disengages from the fixing hole under the action of the second spring, and the fixing frame is disassembled for maintenance. After the maintenance is completed, the fixing frame is installed into the cylinder, and the fixing rod is moved to be clamped with the fixing hole. The clamping rod is clamped with the clamping hole under the action of the first spring, and is fixed to complete the maintenance, thereby achieving the purpose of facilitating maintenance, reducing the workload, and improving the efficiency of maintenance;

[0021] 2. The utility model drives the toothed disc to rotate through the rotation of the first motor, the rotation of the toothed disc causes the gear to reciprocate, the reciprocating rotation drives the rotating shaft to reciprocate, the reciprocating rotation of the rotating shaft drives the cylinder to reciprocate, the reciprocating rotation of the cylinder drives the exhaust mechanism to reciprocate, so as to achieve the purpose of shaking the head to exhaust, increase the range of exhaust, and improve the efficiency of exhaust. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional diagram of the structure of the utility model;

[0023] Figure 2 It is a cross-sectional view of the structure of the utility model;

[0024] Figure 3 It is a side sectional view of a local structure of the utility model;

[0025] Figure 4 It is a top view cross-sectional view of the structure of the utility model;

[0026] Figure 5 This utility model Figure 2 A magnified view of the structure at center;

[0027] Figure 6 This utility model Figure 2 Enlarged view of the structure at point B in the middle.

[0028] Figure numerals: 1. fixed shell; 2. rotating shaft; 3. cylinder; 4. fixed frame; 5. exhaust mechanism; 6. fixed rod; 7. fixing hole; 8. clamping rod; 9. first spring; 10. clamping hole; 11. shell; 12. first motor; 13. gear plate; 14. gear; 15. second motor; 16. fan blade; 17. pull block; 18. second spring; 19. protective net; 20. protective shell; 21. mounting plate; 22. limit plate. DETAILED DESCRIPTION

[0029] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0030] Embodiment 1:

[0031] refer to Figure 1 , Figure 2 , Figure 3 and Figure 5 A laboratory emergency exhaust fan comprises a fixed shell 1, the inner wall of the fixed shell 1 is rotatably connected with a rotating shaft 2, a cylinder 3 is bolted between the rotating shafts 2, a fixing frame 4 is slidably sleeved on the inner wall of the cylinder 3, an exhaust mechanism 5 is arranged on the surface of the fixing frame 4, a fixing rod 6 is slidably sleeved on the inner wall of the cylinder 3, a fixing hole 7 is opened on the surface of the fixing frame 4, and the fixing rod 6 is clamped with the fixing hole 7, a clamping rod 8 is slidably sleeved on the inner wall of the cylinder 3, a first spring 9 is fixedly sleeved on the surface of the clamping rod 8, and a clamping hole 10 is clamped on the surface of the fixing rod 6, The clamping rod 8 is clamped with the clamping hole 10, and the clamping rod 8 is disengaged from the clamping hole 10 by moving the pull block 17. Then, the fixing rod 6 is disengaged from the fixing hole 7 under the action of the second spring 18, and the fixing frame 4 is disassembled for maintenance. After the maintenance is completed, the fixing frame 4 is installed into the cylinder 3, and the fixing rod 6 is moved to clamp the fixing rod 6 with the fixing hole 7. The clamping rod 8 is clamped with the clamping hole 10 under the action of the first spring 9, and it is fixed to complete the maintenance, thereby achieving the purpose of facilitating maintenance, reducing workload, and improving maintenance efficiency.

[0032] refer to Figure 2 The exhaust mechanism 5 includes a second motor 15, which is bolted to the surface of the fixing frame 4. The output end of the second motor 15 passes through the fixing frame 4 and is fixedly sleeved with a fan blade 16. The exhaust mechanism 5 is provided to facilitate exhaust.

[0033] refer to Figure 5 One end of the clamping rod 8 is bolted with a pull block 17, and the clamping rod 8 is convenient to move by providing the pull block 17.

[0034] refer to Figure 1 , Figure 3 and Figure 5 A second spring 18 is sleeved on the surface of the fixing rod 6 , and the second spring 18 is provided to facilitate the separation of the fixing rod 6 from the fixing hole 7 .

[0035] Embodiment 2:

[0036] refer to Figure 1 , Figure 2 , Figure 4 and Figure 6 The bottom of the fixed shell 1 is bolted with a shell body 11, and the bottom of the shell body 11 is bolted with a first motor 12. The output end of the first motor 12 extends to the inside of the shell body 11 and is fixedly sleeved with a toothed disc 13. The inner wall of the toothed disc 13 is meshed with a gear 14. The axis of the gear 14 is fixedly sleeved with the rotating shaft 2 at the bottom. The toothed disc 13 is driven to rotate by the rotation of the first motor 12. The rotation of the toothed disc 13 causes the gear 14 to reciprocate. The reciprocating rotation drives the rotating shaft 2 to reciprocate. The reciprocating rotation of the rotating shaft 2 drives the cylinder 3 to reciprocate. The reciprocating rotation of the cylinder 3 drives the exhaust mechanism 5 to reciprocate, which can achieve the purpose of shaking the head to exhaust, increase the range of exhaust, and improve the efficiency of exhaust.

[0037] refer to Figure 1 and Figure 2 A protective net 19 is fixedly sleeved on the inner wall of the cylinder 3, and the protective net 19 is provided to prevent debris from entering.

[0038] refer to Figure 1 and Figure 6 A protective shell 20 is bolted to the bottom of the housing 11, and the first motor 12 is located inside the protective shell 20. The first motor 12 is protected by providing the protective shell 20.

[0039] refer to Figure 1 and Figure 2 A mounting plate 21 is bolted to the surface of the fixed shell 1, and the mounting plate 21 is provided to facilitate installation and fixing.

[0040] A brief description of the use process: move the pull block 17, and the movement of the pull block 17 drives the clamping rod 8 to move. The clamping rod 8 moves to disengage the clamping rod 8 from the clamping hole 10, and then the fixing rod 6 is disengaged from the fixing hole 7 under the action of the second spring 18, and the fixing frame 4 is disassembled for maintenance. After the maintenance is completed, the fixing frame 4 is installed into the cylinder 3, and the fixing rod 6 is moved to engage the fixing rod 6 with the fixing hole 7. The clamping rod 8 is engaged with the clamping hole 10 under the action of the first spring 9 to fix it and complete the maintenance, thereby achieving the purpose of facilitating maintenance; the first motor 12 rotates to drive the toothed disc 13 to rotate, and the rotation of the toothed disc 13 causes the gear 14 to reciprocate, and the reciprocating rotation drives the rotating shaft 2 to reciprocate, and the reciprocating rotation of the rotating shaft 2 drives the cylinder 3 to reciprocate, and the reciprocating rotation of the cylinder 3 drives the exhaust mechanism 5 to reciprocate, which can achieve the purpose of shaking the head to exhaust.

[0041] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A laboratory emergency exhaust fan, comprising a fixed housing (1), characterized in that: The inner wall of the fixed shell (1) is rotatably connected with a rotating shaft (2), a cylinder (3) is bolted between the rotating shafts (2), a fixed frame (4) is slidably sleeved on the inner wall of the cylinder (3), an exhaust mechanism (5) is arranged on the surface of the fixed frame (4), a fixed rod (6) is slidably sleeved on the inner wall of the cylinder (3), a fixing hole (7) is provided on the surface of the fixed frame (4), and the fixing rod (6) is snap-fitted with the fixing hole (7), a snap-fitting rod (8) is slidably sleeved on the inner wall of the cylinder (3), a first spring (9) is fixedly sleeved on the surface of the snap-fitting rod (8), a snap-fitting hole (10) is snap-fitted on the surface of the fixing rod (6), and the snap-fitting rod (8) is snap-fitted with the snap-fitting hole (10).

2. A laboratory emergency exhaust fan according to claim 1, characterized in that: The bottom of the fixed shell (1) is bolted to a housing (11), the bottom of the housing (11) is bolted to a first motor (12), the output end of the first motor (12) extends into the interior of the housing (11) and is fixedly sleeved with a toothed disc (13), the inner wall of the toothed disc (13) is meshed with a gear (14), and the axis of the gear (14) is fixedly sleeved with the rotating shaft (2) at the bottom.

3. A laboratory emergency exhaust fan according to claim 1, characterized in that: The exhaust mechanism (5) comprises a second motor (15), the second motor (15) is bolted to the surface of the fixing frame (4), and the output end of the second motor (15) passes through the fixing frame (4) and is fixedly sleeved with a fan blade (16).

4. A laboratory emergency exhaust fan according to claim 1, characterized in that: One end of the clamping rod (8) is bolted with a pull block (17).

5. A laboratory emergency exhaust fan according to claim 1, characterized in that: A second spring (18) is sleeved on the surface of the fixing rod (6).

6. A laboratory emergency exhaust fan according to claim 1, characterized in that: A protective net (19) is fixedly sleeved on the inner wall of the cylinder (3).

7. A laboratory emergency exhaust fan according to claim 2, characterized in that: A protective shell (20) is bolted to the bottom of the housing (11), and the first motor (12) is located inside the protective shell (20).

8. A laboratory emergency exhaust fan according to claim 1, characterized in that: A mounting plate (21) is bolted to the surface of the fixed shell (1).

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