Laboratory ventilating duct

Abstract

The utility model is applicable to the technical field of ventilating ducts, and provides a laboratory ventilating duct which comprises a ventilating duct body, a horizontal pipe is horizontally connected to the side end of the bottom of the ventilating duct body in a penetrating mode, a stretching hose is vertically installed at the bottom of the horizontal pipe in a penetrating mode, and the stretching hose vertically penetrates through the side end of a large horn cover. A long spring is vertically fixed in the stretching hose, and the long spring is used for driving the stretching hose to reset after deformation; the bottom of the stretching hose is vertically connected with a hollow grip, the hollow grip is communicated with the interior of the stretching hose, and the hollow grip is used for being held by a user for operation. The handheld exhaust device is arranged, smoke can be sucked away in time when the smoke does not diffuse in time through the additionally arranged hollow grip and the stretching hose, meanwhile, the stretching hose can be driven to reset after being stretched through the long spring in the stretching hose, and the handheld exhaust device has higher practical value.

Description

Technical Field

[0001] The utility model belongs to the technical field of ventilation ducts, and particularly relates to a laboratory ventilation duct. Background Technique

[0002] A ventilation duct is an infrastructure for air circulation and reducing the concentration of harmful gases. It can be widely used in the purification systems of dust-free workshops in the electronics industry, the purification systems of sterile workshops for medicine and food, the central air-conditioning systems of hotels, shopping malls, hospitals, factories, and office buildings, and can also be applied to the ventilation systems of laboratories. When installing a ventilation duct, brackets are usually used to install it to improve the stability of the duct.

[0003] When installing and fixing the existing laboratory ventilation ducts, there are certain height requirements. Because there is a certain height difference between the ventilation duct and the experimental bench, when researchers conduct experiments and generate a large amount of smoke, the smoke cannot be discharged from the laboratory by the ventilation duct in time, resulting in the problem of smoke dispersion, which has a certain adverse impact on people. Therefore, in order to solve the problem that when a large amount of smoke is generated during an experiment, the ventilation duct cannot exhaust it in time, a laboratory ventilation duct is provided. Summary of the Utility Model

[0004] The utility model provides a laboratory ventilation duct, aiming to solve the problem that when a large amount of smoke is generated during an experiment, the ventilation duct cannot exhaust it in time, and the dispersed smoke will have an adverse impact on people mentioned in the above background technique.

[0005] The utility model is realized as follows. A laboratory ventilation duct includes a ventilation duct and a large bell mouth. The large bell mouth is vertically fixed at the bottom of the ventilation duct, and a telescopic suction mechanism penetrating the large bell mouth is arranged on the outer wall of the ventilation duct;

[0006] The telescopic suction mechanism includes: a small bell mouth, a telescopic component, and a limiting component;

[0007] The telescopic component under a downward pulling force extends downward and drives the small bell mouth to cover the smoke and odor source;

[0008] The limiting component is used to limit the reset height of the telescopic component in the reset state and buffer the kinetic energy of the reset component reset to the highest point.

[0009] Preferably, a support plate is vertically fixed on the outer periphery of the bottom of the hollow grip. The telescopic component includes: a horizontal pipe, a stretching hose, a long spring, and a hollow grip;

[0010] A horizontal pipe is horizontally and penetratingly connected to the bottom side end of the ventilation duct. A stretching hose is vertically and penetratingly installed at the bottom of the horizontal pipe. The stretching hose vertically penetrates through the side end of the large horn-shaped cover. A long spring is vertically fixed inside the stretching hose, and the long spring is used to drive the stretching hose to return to its original position after deformation;

[0011] The bottom of the stretching hose is vertically connected with a hollow grip. The hollow grip is in communication with the inside of the stretching hose, and the hollow grip is used for the user to hold and operate.

[0012] Preferably, a support plate is vertically fixed around the bottom of the hollow grip. The support plate is used to block and limit the user's hand to prevent the hollow grip from slipping out of the hand.

[0013] Preferably, the limiting component includes: an L-shaped limiting plate and a soft rubber gasket;

[0014] An L-shaped limiting plate is vertically fixed to the bottom side end of the large horn-shaped cover. A soft rubber gasket is vertically sleeved at the bottom of the L-shaped limiting plate. The stretching hose vertically penetrates through the middle of the L-shaped limiting plate. The L-shaped limiting plate is used to limit the stretching hose, and the soft rubber gasket is used to reduce the impact force when the stretching hose rebounds.

[0015] Preferably, the stretching hose is of a double-layer structure, and the long spring is vertically distributed in the sandwich structure of the stretching hose to prevent the special experimental gas flowing through the stretching hose from directly contacting the long spring.

[0016] Preferably, a placement opening is vertically formed in the side end of the large horn-shaped cover.

[0017] Preferably, the stretching hose vertically penetrates through the placement opening, and the placement opening provides space for the normal placement of the stretching hose.

[0018] Preferably, the side wall of the placement opening is an arc-shaped curved surface structure, which is used to reduce the friction force between the stretching hose during stretching deformation and the side wall of the placement opening.

[0019] Compared with the prior art, the embodiments of the present application mainly have the following beneficial effects:

[0020] The present utility model provides a hand-held exhaust device. By additionally providing a hollow grip and a stretching hose, the smoke can be sucked away in time before it has time to spread. At the same time, through the long spring inside the stretching hose, after the stretching hose is stretched, it can drive the stretching hose to return to its original position, making it more practical. Description of the Drawings

[0021] Figure 1 is the structural schematic diagram provided by the present utility model;

[0022] Figure 2 It is a schematic diagram of the structure of a large horn cover provided by the present utility model;

[0023] Figure 3 is provided by the present utility model Figure 2 The enlarged view of the structure at position A in

[0024] Figure 4 is a cross-sectional view of the structure of the stretching hose provided by the present utility model.

[0025] In the figure: 1, ventilation duct; 2, large horn cover; 3, horizontal pipe; 4, stretching hose; 5, long spring; 6, hollow grip; 7, small horn cover; 8, support plate; 9, L-shaped limit plate; 10, soft rubber washer; 11, storage opening. Detailed implementation manners

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used in the description of the present application in the specification are only for the purpose of describing specific embodiments, and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of this application or the above drawings are used to distinguish different objects, rather than to describe a specific order.

[0027] Referring to "embodiment" herein means that a specific feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0028] An embodiment of the present utility model provides a laboratory ventilation duct, as Figures 1-4 shown, including a ventilation duct 1 and a large horn cover 2. The large horn cover 2 is vertically fixed to the bottom of the ventilation duct 1, and a telescopic suction mechanism penetrating the large horn cover 2 is provided on the outer wall of the ventilation duct 1;

[0029] The telescopic suction mechanism includes: a small horn cover 7, a telescopic component, and a limiting component;

[0030] The telescopic component under a downward pulling force extends downward and drives the small horn cover 7 to cover the smoke and odor generation sources;

[0031] The limiting component is used to limit the reset height of the telescopic component in the reset state and buffer the kinetic energy of the reset component when it is reset to the highest point.

[0032] In this embodiment, it should be supplemented that an air extraction device is connected to the end of the ventilation duct 1 to provide the source power for the air extraction operation of the ventilation duct 1;

[0033] When the user is conducting chemical reaction research, the ventilation duct 1 continuously extracts the air inside the laboratory to ensure that the air inside the laboratory is always circulating;

[0034] If a large amount of smoke is generated due to improper operation when the user is mixing chemical ingredients, the user can hold the hollow grip 6 and pull it downwards. The stretching hose 4 is stressed and undergoes a stretching deformation, so that the hollow grip 6 reaches the place with smoke along with the user, and the smoke is sucked away by the power provided by the air extraction device;

[0035] After completely sucking away the smoke, the user releases the hand. The long spring 5 inside the stretching hose 4 extends and then contracts, driving the stretching hose 4 to contract, causing it and the hollow grip 6 to elastically reset;

[0036] Its beneficial effect is that through the additionally provided hollow grip 6 and stretching hose 4, the smoke can be sucked away in time before it has time to spread. At the same time, through the long spring 5 inside the stretching hose 4, after the stretching hose 4 is stretched, it can drive it to reset, making it more practical.

[0037] In a further preferred embodiment of the present utility model, as Figure 1 shown, the telescopic component includes: a horizontal pipe 3, a stretching hose 4, a long spring 5 and a hollow grip 6;

[0038] The bottom side end of the ventilation duct 1 is horizontally and penetratively connected with a horizontal pipe 3. The bottom of the horizontal pipe 3 is vertically and throughly installed with a stretching hose 4. The stretching hose 4 vertically penetrates through the side end of the large horn-shaped cover 2. A long spring 5 is vertically fixed inside the stretching hose 4. The long spring 5 is used to drive the stretching hose 4 to reset after deformation;

[0039] The bottom of the stretching hose 4 is vertically connected with a hollow grip 6. The hollow grip 6 is internally communicated with the stretching hose 4. The hollow grip 6 is used for the user to hold and operate.

[0040] In this embodiment, the long spring 5 is used to drive the stretching hose 4 to reset after deformation. The bottom of the stretching hose 4 is vertically connected with a hollow grip 6. The hollow grip 6 is internally communicated with the stretching hose 4. The hollow grip 6 is used for the user to hold and operate.

[0041] In a further preferred embodiment of the present utility model, as Figure 1As shown, a support plate 8 is vertically fixed to the outer periphery of the bottom of the hollow grip 6. The support plate 8 is used to block and limit the user's hand to prevent the hollow grip 6 from slipping out of the hand.

[0042] In this embodiment, the support plate 8 is used to block and limit the lower part of the user's hand to prevent the hollow grip 6 from slipping out of the user's hand when the user pulls the stretching hose 4.

[0043] In a further preferred embodiment of the present utility model, as Figures 1-3 shown, the limiting assembly includes: an L-shaped limiting plate 9 and a soft rubber washer 10;

[0044] An L-shaped limiting plate 9 is vertically fixed to the bottom side end of the large horn-shaped cover 2. A soft rubber washer 10 is vertically sleeved on the bottom of the L-shaped limiting plate 9. The stretching hose 4 vertically penetrates through the middle of the L-shaped limiting plate 9. The L-shaped limiting plate 9 is used to limit the stretching hose 4, and the soft rubber washer 10 is used to reduce the impact force when the stretching hose 4 rebounds.

[0045] In this embodiment, the stretching hose 4 vertically penetrates through the middle of the L-shaped limiting plate 9. The L-shaped limiting plate 9 is used to limit the stretching and rebounding of the stretching hose 4, and the soft rubber washer 10 is used to reduce the impact force when the stretching hose 4 rebounds.

[0046] In a further preferred embodiment of the present utility model, as Figure 4 shown, the stretching hose 4 is of a double-layer structure, and the long spring 5 is vertically distributed in the sandwich structure of the stretching hose 4 to prevent the special experimental gas flowing through the stretching hose 4 from directly contacting the long spring 5.

[0047] In this embodiment, the stretching hose 4 is of a double-layer structure to prevent the special experimental gas flowing through the stretching hose 4 from directly contacting the long spring 5, thereby corroding the long spring 5.

[0048] In a further preferred embodiment of the present utility model, as Figures 2-3 shown, a storage opening 11 is vertically formed on the side end of the large horn-shaped cover 2. The stretching hose 4 vertically penetrates through the storage opening 11, and the storage opening 11 provides space for the normal placement of the stretching hose 4.

[0049] In this embodiment, the storage opening 11 provides space for the normal placement of the stretching hose 4.

[0050] In a further preferred embodiment of the present utility model, as Figures 2-3 shown, the side wall of the storage opening 11 is an arc-shaped curved surface structure for reducing the friction force between the stretching hose 4 and the side wall of the storage opening 11 when the stretching hose 4 is stretched and deformed.

[0051] In this embodiment, the side wall of the storage opening 11 is an arc-shaped curved surface structure for reducing the friction force between the stretching hose 4 and the side wall of the storage opening 11 when the stretching hose 4 is stretched and deformed.

[0052] It should be noted that for the foregoing embodiments, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that the present utility model is not limited by the described action sequence, because according to the present utility model, certain steps may be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to the present utility model.

[0053] In several embodiments provided by the present application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the above division of units can be implemented in other ways during actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the shown or discussed coupling or communication connection between each other can be through some interfaces. The indirect coupling or communication connection between devices or units can be in the form of telecommunications or other forms.

[0054] The units described above as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0055] The above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit the protection scope of the utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on these embodiments, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, those of ordinary skill in the art can still, without conflict, make combinations, additions, deletions or other adjustments to the features in the embodiments of the present utility model according to the situation without creative work, so as to obtain different technical solutions that essentially do not deviate from the concept of the present utility model. These technical solutions also belong to the scope of protection of the present utility model.

Claims

1. A laboratory ventilation duct, comprising a ventilation duct and a large speaker cover, wherein the large speaker cover is vertically fixed to the bottom of the ventilation duct, characterized in that: The outer wall of the ventilation duct is provided with a telescopic air suction mechanism penetrating the large horn cover; The telescopic air suction mechanism comprises: a small horn cover, a telescopic component and a limit component; The telescopic component subjected to the downward pulling force extends downward, and drives the small speaker cover to cover the smoke and odor generation source; The limit assembly is used to limit the reset height of the telescopic assembly in the reset state, and to buffer the kinetic energy of the reset assembly when it is reset to the highest point.

2. A laboratory ventilation duct as claimed in claim 1, characterized in that: The telescopic assembly includes: a horizontal tube, a stretch hose, a long spring and a hollow handle; A horizontal pipe is horizontally connected to the side end of the bottom of the ventilation duct, a stretch hose is vertically installed through the bottom of the horizontal pipe, the stretch hose vertically penetrates the side end of the large speaker cover, a long spring is vertically fixed inside the stretch hose, and the long spring is used to drive the stretch hose to reset after deformation; A hollow handle is vertically connected to the bottom of the stretch hose, and the hollow handle is communicated with the interior of the stretch hose. The hollow handle is used for hand-held operation by a user.

3. A laboratory ventilation duct as claimed in claim 2, characterized in that: A support plate is vertically fixed to the periphery of the bottom of the hollow handle, and the support plate is used to block and limit the user's hand to prevent the hollow handle from slipping out of the hand.

4. A laboratory ventilation duct as claimed in claim 2, characterized in that: The limiting assembly includes: an L-shaped limiting plate and a soft rubber gasket; An L-shaped limit plate is vertically fixed to the bottom side end of the large speaker cover, and a soft rubber gasket is vertically sleeved on the bottom of the L-shaped limit plate. The stretch hose vertically passes through the middle of the L-shaped limit plate. The L-shaped limit plate is used to limit the stretch hose, and the soft rubber gasket is used to reduce the impact force of the stretch hose when it rebounds.

5. A laboratory ventilation duct as claimed in claim 2, characterized in that: The stretch hose has a double-layer structure, and the long spring is vertically distributed in the sandwich structure of the stretch hose to prevent the special experimental gas flowing through the stretch hose from directly contacting the long spring.

6. A laboratory ventilation duct as claimed in claim 2, characterized in that: A storage opening is vertically opened at the side end of the large speaker cover.

7. A laboratory ventilation duct as claimed in claim 6, characterized in that: The stretch hose vertically passes through the storage opening, and the storage opening provides space for the normal placement of the stretch hose.

8. A laboratory ventilation duct as claimed in claim 7, characterized in that: The side wall of the storage port is an arc-shaped curved surface structure, which is used to reduce the friction between the stretch hose and the side wall of the storage port when the stretch hose is stretched and deformed.

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