Draught hood for chemical reagent barrel

Abstract

The utility model relates to the technical field of ventilation equipment, and discloses a draught hood for a chemical reagent barrel, which comprises a hood body and an exhaust pipe connected with the hood body, the hood body comprises a base and a hood surface which are made of anti-corrosion materials, the base is used for placing the whole draught hood on a platform, the hood surface is arranged at the top of the base, and an opening of the hood surface faces obliquely downward. The lower side face of the cover face is of an open structure, the upper side plate is provided with a through hole communicated with the exhaust pipe, a cavity is formed between the upper side plate of the cover face and the bottom of the base and used for containing a chemical reagent barrel, and an opening of the chemical reagent barrel is located in the cover face. Corrosion resistance is improved through anti-corrosion materials so that the service life can be prolonged, stability and moving flexibility are considered in the design of the base, the inclined opening and the lower side opening structure form a semi-closed flow guide space, tight attachment to a barrel opening can be achieved, volatile gas can be efficiently pumped and exhausted through directional airflow, dissipation of poisonous and harmful gas is effectively restrained, and the service life of the barrel is prolonged. Therefore, the operation environment safety is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a ventilation equipment field especially relates to a kind of for chemical reagent barrel's exhaust hood. BACKGROUND

[0002] In the chemical field, 25L chemical reagent barrel is often used to transport chemical reagent, such as hydrochloric acid, nitric acid, ammonia water etc., when using in the field, pump is needed to extract chemical reagent from chemical reagent barrel, generally called acid extraction process. In this process, the lid on 25L chemical reagent barrel needs to be opened first, then suction tube is put into the opening, and finally pump is used to extract chemical reagent. Because some chemical reagents with strong volatility (such as hydrochloric acid, nitric acid, ammonia water etc.), when the lid of chemical reagent barrel is opened, a large amount of toxic and harmful gas will be released, which will cause corrosion of equipment, harm the health of operators, etc.

[0003] To avoid gas diffusion, exhaust equipment is usually used to suck toxic and harmful gas, such as the exhaust hood disclosed in the patent document with publication number CN208178061U, which has a mechanical rotating arm and can realize omnidirectional adjustment. However, this exhaust hood is not suitable for acid extraction process. On the one hand, the mechanical arm, rotating shaft and fixing bolt are made of metal, which is not resistant to strong acid corrosion. On the other hand, the exhaust hood needs to be installed on the wall and fixed support, so the installation position and moving range are limited. There is no relevant installation position on the test bench or steel platform, and it cannot meet the flexible use requirements, so the exhaust hood is not suitable for acid extraction process. SUMMARY

[0004] To overcome the above-mentioned shortcomings of existing exhaust hoods, the technical problem to be solved by the utility model is to provide an exhaust hood for chemical reagent barrel that can be used flexibly.

[0005] The technical solution adopted by the utility model to solve its technical problem is:

[0006] The exhaust hood for chemical reagent barrel comprises a cover body and an exhaust pipe connected to the cover body. The cover body comprises a base made of corrosion-resistant material and a cover surface. The base is used to place the entire exhaust hood on a platform. The cover surface is arranged on the top of the base, with its opening facing obliquely downward, and the lower side is an open structure. The upper side plate is provided with a through hole in communication with the exhaust pipe. The upper side plate of the cover surface and the bottom of the base form a cavity. The cavity is used to accommodate the chemical reagent barrel, and the opening of the chemical reagent barrel is located in the cover surface.

[0007] Further, the exhaust pipe is a corrugated flexible pipe.

[0008] Further, the cover surface is enclosed by a rectangular back plate, and a trapezoidal upper side plate, left side plate and right side plate connected to the upper side and left and right sides of the back plate respectively.

[0009] Further, the left side plate and the right side plate of the cover surface are respectively provided with a handle on the outer side thereof.

[0010] Further, the base comprises an L-shaped support plate and a support rod, the head of the support plate is fixedly connected with the lower side of the back plate, and the support rod is connected between the tail of the support plate and the back plate.

[0011] Further, the bottom upper side of the support plate is provided with a magnet.

[0012] Further, the bottom lower side of the support plate is provided with a suction cup.

[0013] The beneficial effects of the present application are as follows:

[0014] 1. Strong corrosion resistance: the cover body is made of corrosion-resistant material, which can effectively resist the corrosion of strong volatile chemical reagents and significantly prolong the service life of the device;

[0015] 2. Flexible and convenient operation: the base support structure realizes overall stable placement on the platform (such as an experimental table), which is convenient for moving and adjusting the position and adapts to different working scene requirements;

[0016] 3. Good adaptability to chemical reagent barrels: the downward inclined design of the cover surface opening combined with the open structure of the lower side can tightly fit the chemical reagent barrel opening to form an enclosed space, and also facilitate observation and operation of the reagent barrel;

[0017] 4. High exhaust efficiency: the structure design of the upper side plate through hole directly connected with the exhaust pipe, combined with the directional guiding effect of the cavity inside the cover surface, can quickly exhaust volatile gas, effectively prevent the overflow of toxic and harmful gas, and ensure the safety of the working environment. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the present application;

[0019] Figure 2 is a front view of the present application;

[0020] Figure 3 is a back view of the present application.

[0021] In the figure, 1 is a cover surface, 2 is a base, 3 is an exhaust pipe, 4 is a chemical reagent barrel, 11 is an upper side plate, 12 is a through hole, 13 is a back plate, 14 is a left side plate, 15 is a right side plate, 16 is a handle, 21 is a support plate, 22 is a support rod, 23 is a magnet, and 24 is a suction cup. DETAILED DESCRIPTION

[0022] The present application will be further described below in conjunction with the drawings.

[0023] It should be noted that if the utility model has involved directional indication language, such as up, down, left, right, front, back, direction language, it is for the description of the relative position relationship between components, not the absolute position of the relative components, the relative position relationship between components, the movement condition and the like in a certain specific posture, if the specific posture changes, the directional indication also changes accordingly. If the utility model has involved the number of words, such as "many", "many", "several" and the like, it specifically refers to two and more than two.

[0024] As shown in Figure 1 The utility model provides a kind of for chemical reagent barrel's induced draft hood, including cover body and with cover body's induced draft pipe 3, the cover body includes by the base 2 of anticorrosive material and cover surface 1, the base 2 is used to place entire induced draft hood on platform, the cover surface 1 is set in base 2 top, its opening is towards obliquely downwards, and downside is open structure, and the upper side plate 11 is equipped with the through hole 12 being connected with induced draft pipe 3, the upper side plate 11 of cover surface 1 and the bottom between base 2 form cavity, the cavity is used to accommodate chemical reagent barrel 4, and make the opening of chemical reagent barrel 4 be located in cover surface 1.The size of entire induced draft hood and the opening size of cover surface 1 downside are designed according to commonly used 25L chemical reagent barrel, ensure that when chemical reagent barrel and base 2 are placed on the same plane, the opening of chemical reagent barrel top side can be located in the cover setting range of cover surface 1.Anticorrosive material can adopt commonly used PVC material, entire induced draft hood is formed by integral injection molding, avoid using screw and other metal connecting pieces, ensure anticorrosive effect.Compared with traditional fixed induced draft hood, the utility model places entire induced draft hood on platform through base 2, only through induced draft pipe 3 and induced draft equipment are connected, the position of induced draft hood can be moved flexibly.

[0025] The use process of the utility model is: first, the device is placed in front of the chemical reagent barrel 4 that needs to be extracted, so that the opening of the cover surface 1 covers the opening of the chemical reagent barrel 4, then the valve of the induced draft equipment or the induced draft pipe is opened, the induced draft state is maintained, finally the lid of the chemical reagent barrel 4 is opened, the acid extraction pipeline is inserted into the chemical reagent barrel 4 to extract acid; after the acid extraction is completed, the lid is closed tightly in the induced draft hood, the chemical reagent barrel 4 is removed, the next barrel is replaced, or the induced draft hood is moved to the position of the next chemical reagent barrel 4, and the operation is repeated, to ensure that all the gas escaping from the chemical reagent barrel 4 is discharged by the induced draft pipe during the entire acid extraction process.

[0026] In order to avoid the influence of induced draft pipe 3 on the movement of induced draft hood, the induced draft pipe 3 is preferably a corrugated hose.

[0027] For the specific structure of the cover 1, since the chemical reagent barrel 4 is overall rectangular, in order to adapt to the external contour thereof, the cover 1 is enclosed by a rectangular back plate 13, and a trapezoidal upper side plate 11, a left side plate 14 and a right side plate 15 connected to the upper side and the left and right sides of the back plate 13 respectively, as shown in Figure 2 The three side plates of the trapezoidal structure can be enclosed to form a rectangular gradually opening, so that the cover is better placed at the opening of the chemical reagent barrel 4, and the gas escape space is reduced.

[0028] As shown in Figure 3 In order to facilitate the movement of the exhaust hood 3, an outer side of the left side plate 14 and the right side plate 15 of the cover 1 is respectively provided with a handle 16.

[0029] For the specific structure of the base 2, the preferred scheme of the utility model is that the base 2 comprises an L-shaped support plate 21 and a support rod 22, the head of the support plate 21 is fixedly connected to the lower side of the back plate 13, and the support rod 22 is connected between the tail of the support plate 21 and the back plate 13. The shape and size of the support plate 21 should ensure that the center of gravity of the entire exhaust hood is located within the range of the support plate 21, so as to ensure the stability of the placement of the exhaust hood 3. At the same time, the upper half of the support plate 21 is preferably provided in a trapezoidal structure, and the lower end is slightly inclined to the opening direction of the cover 1, so as to block the gas escape, and at the same time, the cavity for accommodating the chemical reagent barrel 4 forms a gradually opening, which can play a role in directional flow guiding, and is beneficial to the rapid exhaust of volatile gas. The support rod 22 is a straight bar, and the two ends thereof are connected to the support plate 21 through plastic welding, so as to improve the structural strength of the L-shaped support plate 21.

[0030] In actual use, the chemical reagent barrel 4 is generally placed on the ground or platform. For the chemical reagent barrel 4 placed on the ground, during the acid extraction and barrel replacement process, the support plate 21 can be stepped on to fix the exhaust hood, so as to ensure the butt joint of the cover 1 and the opening of the chemical reagent barrel 4; for the acid extraction process on the flat steel platform or test bench, in order to facilitate the fixation of the exhaust hood, a magnet 23 can be arranged on the upper side of the bottom of the support plate 21, or a suction disc 24 can be arranged on the lower side of the bottom of the support plate 21, so as to ensure the stability of the placement of the exhaust hood during the acid extraction process.

[0031] In summary, the utility model is made of corrosion-resistant material, which can effectively resist the corrosion of strong volatile chemical reagents, and significantly prolong the service life of the device; the entire exhaust hood is stably placed through the base 2, and the position can be flexibly adjusted to adapt to different working scene requirements; and the opening of the cover 1 is designed to be inclined downward, and the lower side is open, which can be closely combined with the opening of the chemical reagent barrel 4 to form an enclosed space, and plays a role in directional flow guiding, which is beneficial to the rapid exhaust of volatile gas, effectively prevents the overflow of toxic and harmful gas, ensures the safety of the working environment, and has good practicality and application value.

Claims

1. A fume hood for chemical reagent barrels, comprising a hood body and a fume exhaust pipe (3) connected to the hood body, characterized in that: The cover body comprises a base (2) made of anti-corrosion material and a cover surface (1), the base (2) is used to place the whole exhaust cover on a platform, the cover surface (1) is arranged on the top of the base (2), the opening of the cover surface (1) faces obliquely downward, the lower side is an open structure, the upper side plate (11) is provided with a through hole (12) communicated with the exhaust pipe (3), the upper side plate (11) of the cover surface (1) and the bottom of the base (2) form a cavity, the cavity is used to accommodate the chemical reagent barrel (4), and the opening of the chemical reagent barrel (4) is located in the cover surface (1).

2. The induced draft hood for a chemical agent drum as claimed in claim 1, wherein: The exhaust pipe (3) is a corrugated hose.

3. The induced draft hood for a chemical agent drum as claimed in claim 1, wherein: The cover surface (1) is enclosed by a rectangular back plate (13), and a trapezoidal upper side plate (11), a left side plate (14) and a right side plate (15) connected with the upper side and the left and right sides of the back plate (13) respectively.

4. The induced draft hood for a chemical agent drum as claimed in claim 3, wherein: A handle (16) is arranged on the outer side of the left side plate (14) and the right side plate (15) of the cover surface (1) respectively.

5. The induced draft hood for a chemical agent drum as defined in claim 3 wherein: The base (2) comprises an L-shaped support plate (21) and a support rod (22), the head of the support plate (21) is fixedly connected with the lower side of the back plate (13), and the support rod (22) is connected between the tail of the support plate (21) and the back plate (13).

6. The induced draft hood for a chemical agent drum as claimed in claim 5, wherein: A magnet (23) is arranged on the bottom upper side of the support plate (21).

7. The induced draft hood for a chemical agent drum as claimed in claim 5, wherein: A suction disc (24) is arranged on the bottom lower side of the support plate (21).

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