CN218030798U - Corrosion-resistant explosion-proof fan spark-proof structure - Google Patents
Corrosion-resistant explosion-proof fan spark-proof structure Download PDFInfo
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- CN218030798U CN218030798U CN202222574367.7U CN202222574367U CN218030798U CN 218030798 U CN218030798 U CN 218030798U CN 202222574367 U CN202222574367 U CN 202222574367U CN 218030798 U CN218030798 U CN 218030798U
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Abstract
The utility model relates to the technical field of explosion-proof fans, in particular to a corrosion-resistant anti-spark structure of an explosion-proof fan, which comprises a fan shell, wherein an impeller and a horn tube with wide outside and narrow inside are arranged inside the fan shell, the impeller is positioned at an inlet and is provided with an air inlet cover, the outside of an air outlet part of the inner end of the horn tube is provided with a PTFE anti-collision lining ring, and the PTFE anti-collision lining ring can separate the air outlet part of the horn tube from the air inlet cover of the impeller; the air inlet cover and the PTFE anti-collision lining ring are of round platform structures with narrow outer parts and wide inner parts, the central axes of the air inlet cover and the PTFE anti-collision lining ring are mutually overlapped, the taper of the air inlet cover is larger than that of the PTFE anti-collision lining ring, and the taper of the PTFE anti-collision lining ring is matched with the shape of an air outlet part of the trumpet pipe. The utility model discloses when the unexpected circumstances such as impeller emergence is not hard up, can prevent that impeller and front end static spare horn tube from giving birth to and bumping and wipe and produce the spark, can prevent again that impeller and fan casing back from taking place to bump and wipe and produce the spark, further promoted the fan security.
Description
Technical Field
The utility model relates to an explosion-proof fan technical field especially relates to a corrosion-resistant explosion-proof fan sparkproof structure.
Background
The fan is a device which utilizes a motor or other driving devices to drive an impeller to rotate and uses input mechanical energy to improve the pressure of gas so as to overcome the resistance of a pipeline or equipment to carry out gas conveying. The fan has wide application range, is just like a heart in the industries of steel, cement, chemical industry, electric power, food, tunnels, mines, building ventilation, dust removal and the like, and provides power for conveying gas and blood. In the industries of chemical engineering, coal mines and the like, a medium which can be possibly used for working or conveyed by a fan in an explosive environment is explosive gas, and the fan needs to be designed into an explosion-proof fan with a sparkproof structure.
The anti-spark structural design of the anti-explosion fan needs to meet the requirements of AMCA standard. A and B-type sparkproof structures of the AMCA standard require that the impeller is made of nonferrous materials, so that the working temperature of the fan is limited. While the class C spark-off configuration requires that it be ensured that movement of the impeller or shaft does not result in rubbing or collision of the two ferrous components to produce a spark. The C-type anti-spark structure of the anti-explosion ventilator in the current market is a structure that a brass/bronze lining ring is added to a flared pipe for air inlet.
However, in the chemical industry, the fan conveying medium is often corrosive gas, or the medium and copper can generate chemical reaction, so that the fire-proof structure of the fan can be damaged, or the conveying medium of the fan can be polluted, and the conventional C type fire-proof structure with the brass/bronze lining ring cannot be realized if the copper material is not adopted. And the A-type and B-type spark-proof structures of the AMCA require that the impeller is made of a non-ferrous material, so that the working temperature of the fan is limited, and the requirements of working conditions can not be met.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the above-mentioned problem that exists among the conventional art, provide a corrosion-resistant explosion-proof fan sparkproof structure.
In order to realize the technical purpose, the technical effect is achieved, the utility model discloses a realize through following technical scheme:
a corrosion-resistant anti-spark structure of an anti-explosion fan comprises a fan shell, wherein an impeller and a horn tube with a wide outer part and a narrow inner part are arranged inside the fan shell, the horn tube is a static piece positioned at the front end of the impeller, an air inlet cover is arranged at an inlet of the impeller, a PTFE anti-collision lining ring is arranged outside an air outlet part of the horn tube positioned at the inner end, and the PTFE anti-collision lining ring can separate the air outlet part of the horn tube from the air inlet cover of the impeller; the air inlet cover and the PTFE anti-collision lining ring are of round platform-shaped structures with narrow outer parts and wide inner parts, the central axes of the air inlet cover and the PTFE anti-collision lining ring are mutually overlapped, the taper of the air inlet cover is larger than that of the PTFE anti-collision lining ring, and the taper of the PTFE anti-collision lining ring is matched with the shape of an air outlet part of the horn tube.
Furthermore, in the above corrosion-resistant anti-explosion fan sparkproof structure, PTFE anti-collision lining rings are installed on the outer sides of the air outlet portions of the trumpet pipes located at the inner ends through a plurality of plastic bolts, the plastic bolts are distributed in an annular array, and mounting holes matched with the plastic bolts are respectively formed in the trumpet pipes and the PTFE anti-collision lining rings.
Furthermore, in the above anti-corrosion anti-explosion fan spark-proof structure, the taper of the air inlet cover is 50-70 °.
Further, in the anti-spark structure of the anti-corrosion anti-explosion fan, the taper of the PTFE anti-collision lining ring is 30-50 degrees.
Furthermore, in the anti-corrosion anti-explosion fan anti-spark structure, the back of the fan shell is mounted on the equipment rack through a plurality of anti-explosion connecting pieces.
Furthermore, in the anti-corrosion anti-explosion fan sparkplug structure, the anti-explosion connecting piece comprises a nut pad cap, a cock and a connecting screw, the nut pad cap is provided with a first through groove through which a rod body in the connecting screw can conveniently pass and a second through groove through which a nut in the connecting screw can conveniently rotate, the first through groove is communicated with the second through groove, and an inner thread groove matched with the outer thread of the rod body in the connecting screw is arranged in the cock.
Furthermore, in the above corrosion-resistant anti-explosion fan sparkproof structure, each part of the anti-explosion connecting piece is made of PTFE material.
The beneficial effects of the utility model are that:
1. the utility model discloses under the condition of horn pipe can not weld brass or bronze junk ring, the mode through bolt locking fixes the outside at the horn pipe with PTFE anticollision junk ring to with spot welding reinforcement between nut and the bolt. The PTFE anti-collision lining ring is an anti-static hard plate, belongs to one type of plastics, and in a material matching table allowed by an anti-explosion fan, the scheme completely meets the requirements of AMCA standard C-type fire-proof design.
2. The utility model has the advantages of reasonable design, when the unexpected circumstances such as impeller emergence is not hard up, can prevent that impeller and front end static component horn tube from giving birth to and strikeing the production spark, can prevent again that impeller and fan casing back from taking place to strikeing the production spark, further promoted the fan security.
Of course, it is not necessary for any product to achieve all of the above advantages simultaneously in practicing the invention.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic view of the installation position of the PTFE anti-collision lining ring of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2;
FIG. 4 is a schematic structural view of an explosion-proof connector according to the present invention;
in the drawings, the components represented by the respective reference numerals are listed below:
the anti-collision device comprises a fan shell 1, a fan impeller 2, a trumpet 3, an air inlet cover 4, a PTFE anti-collision lining ring 5, an anti-explosion connecting piece 6, a nut gasket cap 601, a cock 602, and a connecting screw 603.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.
Example one
Referring to fig. 1-4, the present embodiment is a corrosion-resistant anti-spark structure for an explosion-proof fan, which includes a fan housing 1, an impeller 2 and a flared tube 3 with a wide outer part and a narrow inner part are installed inside the fan housing 1, and the flared tube 3 is a stationary part located at the front end of the impeller 2.
In the embodiment, an air inlet cover 4 is arranged at the inlet of the impeller 2, a PTFE anti-collision lining ring 5 is arranged at the outer side of the air outlet part at the inner end of the flared tube 3, and the PTFE anti-collision lining ring 5 can separate the air outlet part of the flared tube 3 from the air inlet cover 4 of the impeller 2. The air inlet cover 4 and the PTFE anti-collision lining ring 5 are both of a circular truncated cone-shaped structure with a narrow outer part and a wide inner part, the central axes of the air inlet cover 4 and the PTFE anti-collision lining ring 5 are mutually overlapped, the taper of the air inlet cover 4 is larger than that of the PTFE anti-collision lining ring 5, and the taper of the PTFE anti-collision lining ring 5 is matched with the shape of an air outlet part of a trumpet pipe.
In this embodiment, PTFE anti-collision lining rings 5 are mounted on the outer sides of the air outlet portions of the inner ends of the flared tubes 3 through a plurality of plastic bolts, the plastic bolts are distributed in an annular array, and mounting holes matched with the plastic bolts are respectively formed in the flared tubes 3 and the PTFE anti-collision lining rings 5.
In the embodiment, the taper of the air inlet cover 4 is 50-70 degrees, and the taper of the PTFE anti-collision lining ring 5 is 30-50 degrees.
One specific application of this embodiment is: most types of centrifugal fans are provided with a flared tube at an inlet for flow guiding, the fit clearance between the flared tube and an impeller is small, and under special conditions (such as bearing failure and the like), the impeller or a shaft moves and may rub or collide with the flared tube at the inlet, and the friction or collision of two iron parts can generate sparks, so that the requirements of an explosion-proof fan are not met. It is therefore desirable to add brass/bronze bushings to the stationary parts at locations where friction/impact with the rotating parts is likely to occur, to avoid direct friction/impact of the ferrous parts. In the case of horns that cannot be welded with brass or bronze collars, the present embodiment uses PTFE anti-collision collars 5 instead. The main body of the flared tube is made of iron parts like other overflowing parts, a PTFE anti-collision lining ring 5 with the same angle as the outlet of the flared tube is cut, the PTFE anti-collision lining ring 5 is fixed on the outer side of the flared tube in a bolt locking mode, and the nut and the bolt are reinforced through spot welding. The PTFE anti-collision lining ring 5 is an anti-static hard plate, belongs to one type of plastics, and in a material matching table (see EN14986 standard) allowed by an anti-explosion fan, the scheme completely meets the requirements of AMCA standard C type fire-proof design.
Example two
The embodiment is improved on the basis of the first embodiment, as shown in fig. 4, the back of the fan casing 1 is mounted on the equipment rack through a plurality of explosion-proof connectors 6. The explosion-proof connecting piece 6 is composed of a nut pad cap 601, a cock 602 and a connecting screw 603, wherein a first through groove for allowing a rod body in the connecting screw 603 to pass through and a second through groove for allowing a nut in the connecting screw 603 to rotate are formed in the nut pad cap 601, the first through groove is communicated with the second through groove, and an inner thread groove in threaded fit with the outer part of the rod body in the connecting screw 603 is formed in the cock 602.
In this embodiment, each component of the explosion-proof connecting piece is made of PTFE material.
One specific application of this embodiment is: on the basis of the existing conventional C-type fire-proof design scheme, 4-6 machined explosion-proof connecting pieces 6 are uniformly distributed and installed on a circle with the diameter of about 60% -70% of the impeller on the inner side of the back of the fan shell 1. Above-mentioned dual structure takes place when unexpected circumstances such as not hard up at impeller 2, can prevent that impeller 1 and front end static part horn tube 3 from letting go away to rub and produce the spark, can prevent again that impeller 1 and fan casing 1 back from taking place to rub and producing the spark, has further promoted fan security.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not exhaustive and do not limit the invention to the precise embodiments. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.
Claims (7)
1. The utility model provides a corrosion-resistant explosion-proof fan sparkproof structure, includes fan casing, its characterized in that: an impeller and a flared tube with wide outside and narrow inside are arranged inside the fan shell, the flared tube is a static part positioned at the front end of the impeller, an air inlet cover is arranged at the inlet of the impeller, a PTFE anti-collision lining ring is arranged on the outer side of an air outlet part of the flared tube positioned at the inner end, and the PTFE anti-collision lining ring can separate the air outlet part of the flared tube from the air inlet cover of the impeller; the air inlet cover and the PTFE anti-collision lining ring are of round platform-shaped structures with narrow outer parts and wide inner parts, the central axes of the air inlet cover and the PTFE anti-collision lining ring are mutually overlapped, the taper of the air inlet cover is larger than that of the PTFE anti-collision lining ring, and the taper of the PTFE anti-collision lining ring is matched with the shape of an air outlet part of the horn tube.
2. The corrosion-resistant anti-explosion fan spark-proof structure according to claim 1, wherein: the outer side of the air outlet part at the inner end of the horn pipe is provided with a PTFE anti-collision lining ring through a plurality of plastic bolts, the plastic bolts are distributed in an annular array, and the horn pipe and the PTFE anti-collision lining ring are respectively provided with a mounting hole matched with the plastic bolts.
3. The corrosion-resistant anti-explosion fan spark-proof structure according to claim 1, wherein: the taper of the air inlet cover is 50-70 degrees.
4. A corrosion resistant explosion proof fan spark prevention structure as claimed in claim 3, wherein: the taper of the PTFE anti-collision lining ring is 30-50 degrees.
5. The corrosion-resistant anti-explosion fan spark-proof structure according to claim 1, wherein: the back of the fan shell is arranged on the equipment rack through a plurality of explosion-proof connecting pieces.
6. The corrosion-resistant explosion-proof fan sparkproof structure of claim 5, wherein: the explosion-proof connecting piece comprises a nut pad cap, a cock and a connecting screw, wherein the nut pad cap is provided with a first through groove for the rod body in the connecting screw to pass through and a second through groove for the nut in the connecting screw to rotate, the first through groove is communicated with the second through groove, and the cock is internally provided with an internal thread groove which is in threaded fit with the outer part of the rod body in the connecting screw.
7. The corrosion-resistant explosion-proof fan sparkproof structure of claim 6, wherein: all parts of the explosion-proof connecting piece are made of PTFE materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222574367.7U CN218030798U (en) | 2022-09-28 | 2022-09-28 | Corrosion-resistant explosion-proof fan spark-proof structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222574367.7U CN218030798U (en) | 2022-09-28 | 2022-09-28 | Corrosion-resistant explosion-proof fan spark-proof structure |
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| CN218030798U true CN218030798U (en) | 2022-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222574367.7U Active CN218030798U (en) | 2022-09-28 | 2022-09-28 | Corrosion-resistant explosion-proof fan spark-proof structure |
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- 2022-09-28 CN CN202222574367.7U patent/CN218030798U/en active Active
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