Portable shielding device for laboratory fume hood

Abstract

The utility model discloses a portable shielding device for a laboratory fume hood, and relates to the technical field of laboratory facilities, the portable shielding device specifically comprises a device body, a stretching rod and a guide rod, the top and the bottom of an inner cavity of the device body are both movably connected with a rotating rod, the outer ring of the rotating rod is fixedly connected with a coil spring, and the coil spring is movably connected with the stretching rod. The other ends of the coil springs are fixedly connected with the shielding belts, the shielding belts are wound on the coil springs, the two shielding belts are connected through the telescopic belt, and the other ends of the shielding belts and the telescopic belt penetrate through the side wall of the device body and are connected with the outer surface of the stretching rod. According to the portable shielding device for the laboratory fume hood, the length and the height of the shielding cloth for shielding a pipeline at the top of the laboratory fume hood can be adjusted according to requirements, so that the device can adapt to various laboratories, and the adaptability of the device is improved; the device is simple in structure and convenient to carry, the shielding cloth can be automatically stored, and the use convenience of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of laboratory facilities, in particular to a portable shielding device for a laboratory fume hood. Background Art

[0002] Fume hoods are an indispensable part of laboratory ventilation design. In order to prevent laboratory workers from inhaling or swallowing some toxic, pathogenic or unknown toxic chemicals and organisms, the laboratory should have good ventilation. In order to prevent the absorption of some vapors, gases and particles (smoke, soot, dust and aerosols), pollutants must be removed by fume hoods, ventilation hoods or local ventilation.

[0003] Existing laboratory fume hoods are mostly laid with ventilation pipes on the top, and the exposed pipes are not beautiful. To address this problem, sealing plates (metal plates) are generally used. According to the size of the space exposed above the cabinet, some plates are cut, and then these plates are fixed on the top of the fume hood to surround and cover the pipes. However, this sealing plate covering method requires measuring and cutting the size according to the working conditions during actual operation, which is very complicated and time-consuming, reducing the installation efficiency. In addition, the space exposed above the top of the fume hood in each laboratory cannot be guaranteed to be exactly the same. Therefore, the cut plates are not universal, and each installation requires measurement and cutting operations, further reducing the installation efficiency. Based on this, the present application proposes a portable shielding device for laboratory fume hoods. Utility Model Content

[0004] The utility model provides a portable shielding device for a laboratory fume hood, which solves the problems proposed in the above background technology that a shielding device made of a sealing plate is used to shield the exposed pipeline, the shielding device has low installation efficiency, and the shielding device is not universal and has low adaptability.

[0005] The utility model provides the following technical solutions: a portable shielding device for a laboratory fume hood, comprising a device body, a stretching rod, a guide rod and a compensation structure, the top of the inner cavity of the device body and the bottom of the inner cavity are both movably connected with a rotating rod, the outer ring of the rotating rod is fixedly connected with a coil spring, the other end of the coil spring is fixedly connected with a shielding belt, the shielding belt is wound on the coil spring, two shielding belts are connected by a telescopic belt, the other ends of the shielding belt and the telescopic belt pass through the side wall of the device body and are connected to the outer surface of the stretching rod, the end of the shielding belt away from the telescopic belt is fixedly connected with an inflatable belt, and the outer side of the end of the inflatable belt connected to the stretching rod is provided with an inflation hole;

[0006] The device body, stretching rod and guide rod are all telescopic structures. The device body and stretching rod both include a fixed tube and a movable tube. The bottom end of the movable tube is movably connected to the top end of the inner cavity of the fixed tube, and the bottom end of the movable tube is magnetically attracted to the fixed tube. The bottom end of the movable tube is connected to the top end of the fixed tube by bolts.

[0007] Preferably, a groove is provided on one side of the device body, the shielding belt and the telescopic belt are movably connected to the inner cavity of the groove, and the side of the movable tube away from the groove is flush with the side of the fixed tube away from the groove.

[0008] Preferably, the outer diameters of both ends of the guide rod are the same, the guide rod comprises a bottom rod, the top of the bottom rod is fixedly connected to a screw rod, the outer ring of the screw rod is threadedly connected to a threaded tube, and the outer diameter of the bottom rod is the same as the outer diameter of the threaded tube.

[0009] Preferably, the thickness of the shielding band is the same as the thickness of the stretch band, and the length of the shielding band is the same as the length of the stretch band.

[0010] Preferably, isolation pads are fixed to the top and bottom of the device body, the stretching rod and the guide rod.

[0011] Preferably, an implementation of the compensation structure includes an inflatable belt, to which the end of the shielding belt away from the telescopic belt is fixedly connected, an inflation hole is provided on the outer side of the end of the inflatable belt connected to the stretching rod, the outer surface of the inflatable belt is wrapped with a telescopic shell, and the telescopic shell is fixedly connected to the shielding belt.

[0012] Preferably, another implementation of the compensation structure comprises a telescopic rod, both ends of the telescopic rod are fixedly connected with fixing pins.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The portable shielding device for the laboratory fume hood can adjust the length and height of the shielding cloth for shielding the top pipe of the laboratory fume hood according to the needs, so that the device can be adapted to multiple laboratories and improve the adaptability of the device; through the setting of the guide rod, the guide rod can guide and limit the shielding cloth, so that the shielding cloth can shield the ventilation duct.

[0015] 2. The portable shielding device for the laboratory fume hood is composed of a device body, a stretching rod and a guide rod, and has a simple structure and is easy to carry. Through the arrangement of the device body and the stretching rod, the length of the shielding cloth exposed to the outside can be changed by pulling the stretching rod outward, and the restriction on the stretching rod is released. Under the action of the rebound force of the coil spring, the shielding cloth can be automatically wound around the coil spring, thereby realizing automatic storage of the shielding cloth and improving the convenience of using the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front view schematic diagram of the utility model structure using an inflatable belt as a compensation structure;

[0017] Figure 2 The utility model structure Figure 1 Back side diagram;

[0018] Figure 3 This is a schematic diagram of the interior of the structure device of the utility model;

[0019] Figure 4 This is a schematic cross-sectional view of the main body of the structural device of the utility model;

[0020] Figure 5 This is an exploded schematic diagram of the structure device of the utility model;

[0021] Figure 6 It is a schematic diagram of the structure and use of the utility model;

[0022] Figure 7 It is a schematic diagram of the telescopic rod structure of the utility model.

[0023] In the figure: 1. fixed tube; 2. movable tube; 3. inflation hole; 4. shielding belt; 5. bolt; 6. telescopic belt; 7. inflation belt; 8. threaded tube; 9. bottom rod; 10. rotating rod; 11. coil spring; 12. telescopic rod; 13. fixing pin; 14. lower support rod; 15. upper support tube. DETAILED DESCRIPTION

[0024] 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.

[0025] The utility model provides a portable shielding device for a laboratory fume hood, comprising a device body, a stretching rod and a guide rod. The device body, the stretching rod and the guide rod are all telescopic structures. The device body and the stretching rod both include a fixed tube 1 and a mobile tube 2. The bottom end of the mobile tube 2 is movably connected to the top of the inner cavity of the fixed tube 1, and the bottom end of the mobile tube 2 is magnetically attracted to the fixed tube 1. The bottom end of the mobile tube 2 is connected to the top of the fixed tube 1 by bolts. Through the setting of the mobile tube 2 and the fixed tube 1, under the action of external force, the distance between the mobile tube 2 and the fixed tube 1 can be changed, so that the telescopic movement of the device body or the stretching rod is realized. Through the setting of the magnetic attraction between the bottom end of the mobile tube 2 and the fixed tube 1, the mobile tube 2 and the fixed tube 1 can be fixed together, so that the user can use the bolt 5 to fix the mobile tube 2 and the fixed tube 1 together. In some embodiments of the present application, the outer surface of the bottom end of the mobile tube 2 and the inner wall of the top end of the fixed tube 1 are fixed with permanent magnet strips.

[0026] The outer diameters of both ends of the guide rod are the same. The guide rod includes a bottom rod 9. The top of the bottom rod 9 is fixedly connected to a screw rod. The outer ring of the screw rod is threadedly connected to a threaded tube 8. The outer diameter of the bottom rod 9 is the same as the outer diameter of the threaded tube 8. Through the setting of the guide rod, the user can change the length of the guide rod by rotating the threaded tube 8.

[0027] Isolation pads are fixed on the top and bottom of the device body, the stretching rod and the guide rod. The isolation pads can be made of rubber. The setting of the isolation pads reduces the impact of the device body, the stretching rod or the guide on the fume hood and the wall top when in use.

[0028] A slot is provided on one side of the device body, and the top and the bottom of the inner cavity of the device body are movably connected with a rotating rod 10, the outer ring of the rotating rod 10 is fixedly connected with a coil spring 11, and the other end of the coil spring 11 is fixedly connected with a shielding belt 4, the shielding belt 4 is wound on the coil spring 11, and the other end of the shielding belt 4 extends to the outside of the device body through the slot, and the shielding belt 4 is movably connected to the slotted inner cavity. Through the setting of the coil spring 11, under the action of external force, the length of the shielding belt 4 exposed to the outside can be changed. When the restriction on the shielding belt 4 is released, under the action of the rebound force of the coil spring 11, the shielding belt 4 can be automatically wound around the coil spring 11, thereby realizing automatic storage of the shielding belt 4.

[0029] The two shielding belts 4 are connected by a telescopic belt 6, the other end of the telescopic belt 6 extends to the outside of the device body through the groove, the telescopic belt 6 is movably connected to the inner cavity of the groove, and the other ends of the telescopic belt 6 and the shielding belt 4 are fixedly connected to the stretching rod. Through the setting of the telescopic belt 6, when the length of the device body changes, the two shielding belts 4 can always be in a connected state, and the size of the shielding cloth formed by the two shielding belts 4 and the telescopic belt 6 can be adjusted according to needs, so that the device can adapt to a variety of needs when in use, thereby improving the adaptability of the device.

[0030] A portable shielding device for a laboratory fume hood provided by the utility model also includes a compensation structure. In some embodiments of the present application, an implementation of the compensation structure includes an inflatable belt 7, and the inflatable belt 7 is fixedly connected to the end of the shielding belt 4 away from the telescopic belt 6. An inflatable hole 3 is provided on the outer side of the end of the inflatable belt 7 connected to the stretching rod. Through the setting of the inflatable belt 7, when the inflatable belt 7 is inflated, the volume of the inflatable belt 7 can expand. When the device is in use, the inflatable belt 7 can be used to fill the gap between the slot and the top or bottom of the device body, thereby improving the sealing of the device when in use.

[0031] The outer surface of the inflatable belt 7 is wrapped with a telescopic shell, and the telescopic shell is fixedly connected to the shielding belt 4. Through the setting of the telescopic shell, the telescopic shell can protect the inflatable belt 7 and extend the service life of the inflatable belt 7. The material of the inflatable belt 7 can be rubber, and the material of the telescopic shell can be the same as that of the telescopic belt 6.

[0032] In some embodiments of the present application, another implementation of the compensation structure includes a telescopic rod 12, the telescopic rod includes a lower support rod 14, the top of the lower support rod 14 is fixedly connected to a ball screw, the outer ring of the ball screw is threadedly connected to a ball nut, the top of the ball nut is fixedly connected to an upper support tube 15, the upper support tube 15 is movably connected to the ball screw, and one side of the lower support rod 14 and one side of the top of the upper support tube 15 are both fixedly connected to a fixing pin 13. By setting the telescopic rod 12 and the fixing pin 13, when the compensation structure is in use, the fixing pin 13 can be inserted into the shielding belt 4, so that the end of the telescopic rod 12 is fixed together with the shielding belt 4, and when the ball nut rotates, the ball screw can drive the lower support rod 14 to move, and the distance between the upper support tube 15 and the lower support rod 14 can be changed, thereby increasing the distance between the two shielding belts 4, making it easier for the end of the shielding belt 4 away from the telescopic belt 6 to contact the top of the wall or the top of the fume hood, so that the shielding cloth composed of the shielding belt 4 and the telescopic belt 6 can completely cover the space above the laboratory fume hood.

[0033] The thickness value of the shielding band 4 is the same as the thickness value of the telescopic band 6, and the length value of the shielding band 4 is the same as the length value of the telescopic band 6. The shielding band 4 limits the telescopic band 6 so that the telescopic band 6 cannot be telescoped in its length direction, and the telescopic band 6 can only be telescoped in the longitudinal direction. The material of the telescopic band 6 can be elastic textile fabric, such as polyester brocade weft stretch cloth, and the material of the shielding band 4 can be nylon.

[0034] The present application is further described below through an embodiment of the present application. In this embodiment, the compensation structure is an inflatable belt 7.

[0035] To sum up: when the portable shielding device for the laboratory fume hood is used, the staff makes the end of the device body away from the groove fit tightly against the wall, and fixes the device body to the top of one end of the laboratory fume hood. The staff moves the movable tube 2 upward until the top of the movable tube 2 fits tightly against the top of the wall, and uses the bolt 5 to fix the movable tube 2 and the fixed tube 1 together. The height of the device body is adjusted. The staff fixes the guide rod at the corner of the ventilation roller, rotates the threaded tube 8, and changes the height value of the guide rod until the top of the threaded tube 8 fits tightly against the top of the laboratory. The staff moves the stretching rod until the end of the stretching rod away from the shielding band 4 fits tightly against the wall. At this time, the stretching rod is located at the top of the other end of the laboratory fume hood. After fixing the bottom of the stretching rod to the top of the laboratory fume hood, the staff adjusts the height of the stretching rod until the top of the stretching rod fits tightly against the top of the wall, and uses another bolt to fix the position of the movable tube 2 and the fixed tube 1 in the stretching rod. At this time, the state of the device is as shown in the attached manual. Figure 6 As shown, the ventilation duct on the top of the laboratory fume hood is blocked by the shielding cloth formed by the shielding belt 4 and the telescopic belt 6. The inflatable belt 7 is inflated by using an air pump in the prior art (the model may be 550W-8L). When the inflatable belt 7 is inflated, its volume expands until the top of the inflatable belt 7 is tightly fitted with the top of the fume hood and the top of the wall, thereby improving the sealing of the shielding cloth and ensuring the use effect of the device.

[0036] The standard parts used in the utility model can be purchased from the market, and the special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art and will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field. Although the embodiments of the utility model have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A portable shielding device for a laboratory fume hood, comprising a device body, a stretching rod, a guide rod and a compensation structure, characterized in that: The top of the inner cavity of the device body and the bottom of the inner cavity are both movably connected to a rotating rod (10), the outer ring of the rotating rod (10) is fixedly connected to a coil spring (11), the other end of the coil spring (11) is fixedly connected to a shielding belt (4), the shielding belt (4) is wound around the coil spring (11), the two shielding belts (4) are connected by a telescopic belt (6), and the other ends of the shielding belt (4) and the telescopic belt (6) pass through the side wall of the device body and are connected to the outer surface of the stretching rod; The device body, the stretching rod and the guide rod are all telescopic structures. The device body and the stretching rod both include a fixed tube (1) and a movable tube (2). The bottom end of the movable tube (2) is movably connected to the top end of the inner cavity of the fixed tube (1), and the bottom end of the movable tube (2) is magnetically attracted to the fixed tube (1). The bottom end of the movable tube (2) is connected to the top end of the fixed tube (1) via a bolt (5).

2. A portable shielding device for a laboratory fume hood according to claim 1, characterized in that: A slot is provided on one side of the device body, the shielding belt (4) and the telescopic belt (6) are both movably connected to the inner cavity of the slot, and the side of the movable tube (2) away from the slot is flush with the side of the fixed tube (1) away from the slot.

3. A portable shielding device for a laboratory fume hood according to claim 1, characterized in that: The outer diameters of both ends of the guide rod are the same. The guide rod comprises a bottom rod (9). The top of the bottom rod (9) is fixedly connected to a screw rod. The outer ring of the screw rod is threadedly connected to a threaded tube (8). The outer diameter of the bottom rod (9) is the same as the outer diameter of the threaded tube (8).

4. A portable shielding device for a laboratory fume hood according to claim 1, characterized in that: The thickness of the shielding band (4) is the same as the thickness of the elastic band (6), and the length of the shielding band (4) is the same as the length of the elastic band (6).

5. A portable shielding device for a laboratory fume hood according to claim 1, characterized in that: Isolation pads are fixed on the tops and bottoms of the device body, the stretching rod and the guide rod.

6. A portable shielding device for a laboratory fume hood according to claim 1, characterized in that: An embodiment of the compensation structure comprises an inflatable belt (7), one end of the shielding belt (4) away from the telescopic belt (6) is fixedly connected to the inflatable belt (7), an inflation hole (3) is provided on the outer side of the end of the inflatable belt (7) connected to the stretching rod, the outer surface of the inflatable belt (7) is wrapped with a telescopic shell, and the telescopic shell is fixedly connected to the shielding belt (4).

7. A portable shielding device for a laboratory fume hood according to claim 1, characterized in that: Another embodiment of the compensation structure comprises a telescopic rod (12), both ends of the telescopic rod (12) being fixedly connected with fixing pins (13).

Images