Claims:WE CLAIM:
1. A mini fume chamber (200), comprising:
An inverted chamber (100) with a first vertical tube (130) attached to the top end of said chamber100);
an arrangement at a top end of the first vertical tube (130), the arrangement comprising a horizontal tube (140) above the top end of the first vertical tube (140), one end of the horizontal tube (140) attached with a cone (150), a second vertical tube (160) at one end attached with the second end of the horizontal tube (140) attached , the other end of the second vertical tube (160)comprising of a one-way valve (170) and the cone (150) and the second vertical tube (160) being at a distance from the axis of the first vertical tube (140).
2. The mini fume chamber (200) as claimed in claim 1, wherein the one-way valve (170) opens outside the second vertical tube (160).
3. The mini fume chamber (200) as claimed in claim 1, wherein the tubes are made up of PVC.
4. The mini fume chamber (200) as claimed in claim 1, wherein the chamber (100) is made up of PVC.
5. The mini fume chamber (200) as claimed in claim 1, wherein the chamber (100) is transparent.
6. The mini fume chamber (200) as claimed in claim 1, wherein the chamber comprises a window (101) to access the sample and an acid bath.
7. The mini fume chamber (200) as claimed in claim 6, wherein the window (101) is a transparent slitted window.
8. The mini fume chamber (200) as claimed in claim 1, wherein the horizontal tube (140) is being rotatable with respect to the first vertical tube (130).
, Description:FIELD OF INVENTION:
[001] The present invention relates generally to the evacuation of hazardous gas from a lower to a higher height. More specifically, it relates to dispense acid fume to a sufficient height such that it does not cause any damage to the user (e.g. fumes going in the nose and eyes of the experimenter).
BACKGROUND AND PRIOR ART:
[002] Pickling is a metal surface treatment used to remove impurities, such as stains, inorganic contaminants, rust or scale from ferrous metals, copper, precious metals and aluminum alloys. A solution called pickle liquor, which usually contains acid, is used to remove the surface impurities. It is commonly used to descale or clean steel in various steelmaking processes.
[003] Metal surfaces can contain impurities that may affect usage of the product or further processing like plating with metal or painting. Various chemical solutions are usually used to clean these impurities. Strong acids, such as hydrochloric acid and sulfuric acid are common, but different applications use also various other acids. Also alkaline solutions can be used for cleaning metal surfaces. Solutions usually also contain additives such as wetting agents and corrosion inhibitors. Pickling is sometimes called acid cleaning if descaling is not needed.
[004] Experiments involving acids suffer from the hazard of acid fume generation. To counter this, generally a fume chamber is constructed in laboratory roomin the form of separate enclosed chamber fitted with exhaust fan to remove the acid fume out. It has to be built in an elaborate manner and it requires permanent structure. Generally it is made up of brick frame with front panel of glass and is fitted in laboratory room.
[005] CN2375357Y discloses a miniature smoke purifier which is installed on a stove range, mainly composed of a decontamination chamber (8), an exhaust fan (11), a blowing machine (14) and an electric machine (16), wherein, the decontamination chamber (8) is directly sheathed on a chimney (7) of the stove range, and the inner of the decontamination chamber (8) is provided with CaO water solution; the upper part of the decontamination chamber (8) is provided with a cold wind preheating chamber (9) and a smoke chamber (10), and fume impinges against the bottom surface of the cold wind preheating chamber (9) after entering the decontamination chamber (8) through the chimney (7) and turns back into the CaO water solution. The fume enters the smoke chamber (10) after decontaminated and is exhausted by the exhaust fan (11), and thusly, the fume can be decontaminated in the maximum degree. Natural wind is sent to a hot wind plate (19) point below a fire grate (2) through a wind-line system (4) after sent into the cold wind preheating chamber (9) by the blowing machine (14) and preheated, supporting combustion and reducing fume exhausting temperature. The utility model has the advantages and effects of high fume decontaminating rate, no smoke, no harmful gas, high efficiency and energy saving.
[006] The conventional fume chamber is build inside the laboratory room with exhaust fan attached to it to provide the forced draft which also results in spreading of hazardous fumes to spead horizontally along the surface of the roof.
[007] The minifume chamber according to the present invention prevents the acid fume to spread horizontally and to go in the nostrils and eyes of the experimenter, thus minimizing the hazard.
[008] Present invention deals with acid pickling experiment in open air where the laboratory facility is not available. While conducting pickling experiment in open air, the acid fumes are likely to get into nose and eyes of the operatorto cause irritation and health hazards. The current invention is aimed to prevent the acid fume to get into the nose and eyes of experimenter by discharging it at a height above the head level of the experimenter.
OBJECTS OF THE INVENTION:
[009] The principal objective of the present invention is to provide a minifume chamber capable of discharging the acid fume from a lower to a higher height with the help of natural wind draft.
[0010] Another objective of the present invention is to provide a mini fume chamber which can be assembled/disassembled quickly and easily.
[0011] Yet another objective of the invention is to provide a mini fume chamber to suck out the acid fume through pipe and dispose it at a height without any external energy source.
SUMMARY OF THE INVENTION:
[0012] The mini fume chamber according to the present invention creates a suction with the arrangement (of cone and one sided valve) provided at the top. When wind blows from either side, it creates suction and acid fumes are sucked out.
[0013] There is no need of any additional power to create the suction. The natural wind blow is sufficient to create suction due to its unique arrangement.
[0014] The acid fume contained in the chamber is sucked to the top by the suction created due to natural air draft. Other advantages of the invention are its cost effectiveness and portability.
BRIEF DESCRIPTION OF THE DRAWINGS
[0015] It is to be noted, however, that the appended drawings illustrate only typical embodiments of the present subject matter and are therefore not to be considered for limiting of its scope, for the invention may admit to other equally effective embodiments.The detailed description is described with reference to the accompanying figures. In the figures, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the figures to reference like features and components. Some embodiments of system or methods in accordance with embodiments of the present subject matter are now described, by way of example, and with reference to the accompanying figures, in which:
[0016] Fig 1 - Shows the prior art for the Fume chamber.
[0017] Fig 2 - Shows the arrangement of the minifume chamber according to the invention.
[0018] Fig 3a and 3b - Explains the mechanism of working of the invention.
[0019] The figures depict embodiments of the present subject matter for the purposes of illustration only. A person skilled in the art will easily recognize from the following description that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.
DETAIL DESCRIPTION OF THE INVENTION
[0020] The present invention will be described in detail below with reference to an embodiment as shown in the drawing.
[0021] Referring to Fig. 2, the mini fume chamber (200), according to the present invention comprises of an inverted chamber (100) with a transparent silted curtained window (101) in it through which the sample (190) (the metal for which pickling is done) is put in an acid bath (110). Both the acid bath (110) and the chamber (200) are kept on a table (120). A first vertical tube (130), removably attached using a socket provided on the chamber (100), to the top of the chamber (100). On the top end of the first vertical tube (130), a horizontal tube (140) is attached having an angle of 90 degree at one end and a cone (150) is attached on the other end of the horizontal tube (140). A secondvertical tube (160) having a one sided valve (170) is attached to the horizontal tube (140) at the side having 90 degree. The valve (170) attached with the second vertical tube (160) opens outside in the open air and discharge the hazardous fumes generated from the process of acid pickling.
[0022] The inverted chamber (100) used in the preferred embodiment is a transparent cone; however an opaque or translucent cone may also be used.
[0023] The horizontal tube (140) is being rotatable with respect to the first vertical tube (130).
[0024] A scissor type holder (180) is used to place/remove the sample (190) in the acid bath (110) through the window (101).
[0025] Referring to Fig. 3a and 3b, the method of discharge of hazardous fumes is disclosed using the mini fume chamber (200) according to the present invention.
[0026] When the natural air/wind blows from the cone (150) side, the air passes through the horizontal tube (140) and will come out from the other end raising the one sided valve (170). This creates a low pressure region at the junction of the horizontal tube (140) and the first vertical tube (130) according to the Bernoulli’s theorem. This in turn sucks the acid fume from the chamber (200) and dischargesthe same through the one sided valve (170).
[0027] When the air/wind is blown from the one sided valve (170) end, the one sided valve (170) remains closed which will create a low pressure zone created around the opening of the cone (150) which will result in suction of acid fume from the chamber (200) and discharge through the opening of the cone (150).
[0028] It should be noted that the description and figures merely illustrate the principles of the present subject matter. It should be appreciated by those skilled in the art that conception and specific embodiment disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present subject matter. It should also be appreciated by those skilled in the art that by devising various assembly that, although not explicitly described or shown herein, embody the principles of the present subject matter and are included within its spirit and scope. Furthermore, all examples recited herein are principally intended expressly to be for pedagogical purposes to aid the reader in understanding the principles of the present subject matter and the concepts contributed by the inventor(s) to furthering the art, and are to be construed as being without limitation to such specifically recited examples and conditions. The novel features which are believed to be characteristic of the present subject matter, both as to its organization and method of operation, together with further objects and advantages will be better understood from the following description when considered in connection with the accompanying figures.
[0029] These and other advantages of the present subject matter would be described in greater detail with reference to the following figures. It should be noted that the description merely illustrates the principles of the present subject matter. It will thus be appreciated that those skilled in the art will be able to devise various arrangements that, although not explicitly described herein, embody the principles of the present subject matter and are included within its scope.
[0030] It will be further appreciated that functions or structures of a plurality of components or steps may be combined into a single component or step, or the functions or structures of one-step or component may be split among plural steps or components. The present invention contemplates all of these combinations. Unless stated otherwise, dimensions and geometries of the various structures depicted herein are not intended to be restrictive of the invention, and other dimensions or geometries are possible. In addition, while a feature of the present invention may have been described in the context of only one of the illustrated embodiments, such feature may be combined with one or more other features of other embodiments, for any given application. It will also be appreciated from the above that the fabrication of the unique structures herein and the operation thereof also constitute methods in accordance with the present invention. The present invention also encompasses intermediate and end products resulting from the practice of the methods herein. The use of “comprising” or “including” also contemplates embodiments that “consist essentially of” or “consist of” the recited feature.
[0031] Although embodiments for the present subject matter have been described in language specific to structural features, it is to be understood that the present subject matter is not necessarily limited to the specific features described. Rather, the specific features and methods are disclosed as embodiments for the present subject matter. Numerous modifications and adaptations of the system/component of the present invention will be apparent to those skilled in the art, and thus it is intended by the appended claims to cover all such modifications and adaptations which fall within the scope of the present subject matter.