Fume hood doors and fume hoods

Abstract

The utility model discloses a fume hood door, including a door body and two guide rails arranged on the left and right sides of the door body, wherein a guide groove is arranged on the guide rail, and a guide member and a traction member located above the guide member are respectively arranged on the left and right sides of the door body, wherein the guide member and the traction member are inserted into the guide groove, and the guide member can move up and down along the guide groove; a spring balancer is also arranged on the guide rail, wherein the spring balancer is fixed in the guide groove, and the traction rope of the spring balancer extends downward and is connected to the traction member. The utility model also provides a fume hood, including a cabinet body and the fume hood door as described above. By adopting the above technical scheme, a spring balancer is directly arranged on the inner side of the slide rail, and the traction rope of the spring balancer is connected to the traction member on the side of the door body, and the coil spring in the spring balancer provides the door body with a pulling force to balance its gravity, so that the overall structure is more compact.

Description

Technical Field

[0001] The utility model relates to a fume hood door and a fume hood, belonging to the technical field of laboratory equipment. Background Art

[0002] A fume hood used in a laboratory is a device used to protect laboratory workers from exposure to harmful gases, steam and dust. The fume hood ensures the safety and cleanliness of the experimental environment by exhausting harmful substances from the operating area. The door of the fume hood is usually set to be able to be raised and lowered and suspended. For example, an automatic lowering device for the door of a fume hood disclosed in Chinese patent document CN206722620U, and another example is a laboratory fume hood disclosed in Chinese patent document CN217017883U. Both use a counterweight, a pulley (or sprocket) and a transmission belt (or transmission chain) as a balancing mechanism. However, this structure must be equipped with a longer transmission belt, which is guided by at least two pulleys and extends to the back side of the cabinet to connect to the counterweight, resulting in a larger space occupied by the balancing mechanism and a slightly complicated installation structure. Utility Model Content

[0003] Therefore, an object of the present invention is to provide a fume hood door and a fume hood having the fume hood door, which do not require a balancing mechanism with a counterweight, thereby simplifying the overall structure and facilitating installation.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a ventilation cabinet door, including a cabinet door body and two guide rails arranged on the left and right sides of the cabinet door body, wherein a guide groove is arranged on the guide rail, and a guide member and a traction member located above the guide member are respectively arranged on the left and right sides of the cabinet door body, the guide member and the traction member are inserted into the guide groove, and the guide member can move up and down along the guide groove; a spring balancer is also arranged on the guide rail, and the spring balancer is fixed in the guide groove, and the traction rope of the spring balancer extends downward and is connected to the traction member.

[0005] The guide rail is fixed on one side frame; the bottoms of the two side frames are fixedly connected through a bottom frame.

[0006] The guide groove is a U-shaped groove, including two opposite guide groove side walls, a guide groove bottom wall and an open end opposite to the guide groove bottom wall. The guide groove side walls are provided with limiting ridges blocking the left and right sides of the guide member.

[0007] A plurality of guide members are respectively arranged on the left and right sides of the cabinet door body.

[0008] The guide member is a roller, and the outer diameter of the roller is smaller than the width of the guide groove.

[0009] The utility model also provides a fume hood, comprising a hood body and the fume hood door as described above.

[0010] By adopting the above technical scheme, the fume hood door of the utility model and the fume hood having the fume hood door change the previous balancing structure through counterweights, pulleys and transmission belts, and directly arrange a spring balancer on the inner side of the slide rail, which is connected to the traction piece on the side of the cabinet door body through the traction rope of the spring balancer, and the coil spring in the spring balancer provides the cabinet door body with a pulling force to balance its gravity, so that the overall structure is more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the fume hood door of the utility model.

[0012] Figure 2 Schematic diagram of the exploded view of the fume hood door.

[0013] Figure 3 for Figure 2 Schematic diagram from another angle.

[0014] Figure 4 This is a schematic diagram of the exploded view of the guide rail and side frame.

[0015] Figure 5 It is a top view of the assembly structure of the guide rail and the side frame.

[0016] Figure 6 It is a top view of the assembly structure of the guide member and the guide rail.

[0017] Figure 7 It is a structural schematic diagram of the fume hood of the utility model. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below through the accompanying drawings and specific implementation methods.

[0019] like Figure 7 As shown, the utility model provides a fume hood, including a cabinet body 1, a workbench is arranged in the cabinet body 1, and a fume hood door 2 is arranged on the front side of the workbench. A fan 3 is also arranged on the cabinet body 1, and the fan 3 is connected to the inside of the cabinet body 1 through a pipeline, and is used to discharge the air in the cabinet body 1 to the outside.

[0020] like Figure 2-6As shown, the fume hood door 2 includes a door body 21 and a door frame 22, the door frame 22 includes two side frames 221 and a bottom frame 222 fixedly connected to the two side frames 221, the side frames 221 are C-shaped profiles, and a guide rail 23 is fixedly arranged inside the side frames 221, and a plurality of guide members 24 are arranged at intervals on the left and right sides of the door body 21, respectively, and the guide members 24 can move up and down along the guide rail 23. In this embodiment, a guide groove 231 is arranged on the guide rail 23, and the guide groove 231 is a U-shaped groove, including two opposite guide groove side walls 231a, a guide groove bottom wall 231b, and an open end 231c opposite to the guide groove bottom wall 231b, and the guide member 24 can be inserted into the guide groove 231 at the open end 231c. The guide member 24 is a roller, and the outer diameter of the roller is smaller than the width of the guide groove 231, so that the guide member 24 can only contact with one of the two opposite guide groove side walls 231a for rolling, and will not contact with both guide groove side walls 231a at the same time. The guide groove side walls 231a are also provided with limiting ridges 231d blocking the left and right sides of the roller, which are used to limit the position of the roller.

[0021] A traction member 26 is also provided on the left and right sides of the cabinet door body 21, and the traction member 26 is located above the uppermost roller. The traction member 26 is inserted into the guide groove 231. A spring balancer 27 is also provided on the guide rail 23, and the spring balancer 27 is fixed in the guide groove 231. The traction rope 271 of the spring balancer 27 extends downward and is connected to the traction member 26.

[0022] By adopting the above technical scheme, the fume hood door 2 of the utility model and the fume hood having the fume hood door 2 change the previous balancing structure through counterweights, pulleys and transmission belts, and directly set a spring balancer 27 on the inner side of the slide rail, which is connected to the traction member 26 on the side of the cabinet door body 21 through the traction rope 271 of the spring balancer 27. The coil spring in the spring balancer 27 provides the cabinet door body 21 with a pulling force to balance its gravity, making the overall structure more compact.

[0023] Obviously, the above embodiments are only examples for clear explanation, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from them are still within the protection scope of the invention of the utility model.

Claims

1. A fume hood door, characterized in that: It includes a cabinet door body and two guide rails arranged on the left and right sides of the cabinet door body, wherein a guide groove is arranged on the guide rail, and a guide member and a traction member located above the guide member are respectively arranged on the left and right sides of the cabinet door body, wherein the guide member and the traction member are inserted into the guide groove, and the guide member can move up and down along the guide groove; a spring balancer is also arranged on the guide rail, wherein the spring balancer is fixed in the guide groove, and the traction rope of the spring balancer extends downward and is connected to the traction member.

2. The fume hood door according to claim 1, characterized in that: The guide rail is fixed on one side frame; the bottoms of the two side frames are fixedly connected through a bottom frame.

3. The fume hood door according to claim 1, characterized in that: The guide groove is a U-shaped groove, including two opposite guide groove side walls, a guide groove bottom wall and an open end opposite to the guide groove bottom wall. The guide groove side walls are provided with limiting ridges blocking the left and right sides of the guide member.

4. The fume hood door according to claim 3, characterized in that: A plurality of guide members are respectively arranged on the left and right sides of the cabinet door body.

5. The fume hood door according to claim 4, characterized in that: The guide member is a roller, and the outer diameter of the roller is smaller than the width of the guide groove.

6. A fume hood, characterized in that: The utility model comprises a cabinet body and a fume hood door as claimed in any one of claims 1 to 5.

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