CN216975333U - Volute device of centrifugal fan of blowing-type cooling tower - Google Patents
Volute device of centrifugal fan of blowing-type cooling tower Download PDFInfo
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- CN216975333U CN216975333U CN202122290345.3U CN202122290345U CN216975333U CN 216975333 U CN216975333 U CN 216975333U CN 202122290345 U CN202122290345 U CN 202122290345U CN 216975333 U CN216975333 U CN 216975333U
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Abstract
The utility model relates to the technical field of cooling towers, in particular to a volute device of a centrifugal fan of a blowing-type cooling tower. Comprises supporting cover plates and a shell plate positioned between the two supporting cover plates; volute fixing holes distributed in an Archimedes line are formed in the supporting cover plate; an air inlet hole is formed in the middle of the supporting cover plate, and an air collector is arranged on the air inlet hole; both sides of the shell plate are provided with screw technological holes; the shell plate is connected with the volute fixing hole on the corresponding support cover plate through a screw tooth process hole by adopting a screw or a rivet to form a volute structure. The beneficial effects of the utility model are as follows: the manufacturing difficulty of the fan volute of the blowing cooling tower can be greatly reduced, the production efficiency is improved, the production cost is reduced, and the installation and the maintenance are convenient.
Description
Technical Field
The utility model relates to the technical field of cooling towers, in particular to a volute device of a centrifugal fan of a blowing-type cooling tower.
Background
As shown in fig. 1, a motor is installed at the bottom of an existing blowing-type cooling tower, a centrifugal fan 2 on the shaft is driven by a belt to rotate, the centrifugal fan 2 is installed in a fan volute 3, a support is arranged below the fan volute 3, a single shaft can drive a plurality of fans at the same time, air enters from an air inlet 4 of the fan volute 3, is blown out from an air outlet 5, and flows out of a tower body from the upper part of a water collector. Cooling water enters the tower from the water inlet, is sprayed to the surface of the filler through the spraying system, flows down along the filler under the action of gravity, fully exchanges heat with air at the filler honeycomb position, flows out from the water outlet of the water collecting basin, and circulates in the way. The existing centrifugal fan volute is spiral as shown in fig. 2, an air inlet 4 is formed in the side edge, an air outlet 5 is formed in the end head, the fan volute 3 is formed by welding, a centrifugal fan is arranged in the volute, an air collector is arranged in the air inlet 4, and the air inlet efficiency of the fan can be effectively increased by the air collector. The volute is mostly formed by integral casting during manufacturing, but the volute manufactured by the method is rough and unaesthetic in appearance, inaccurate in size and higher in cost, and more importantly, the production method is not suitable for the field of cooling towers. Other then adopt whole welding forming mostly, because the welding has welding stress and heat altered shape, consequently the spiral case material of making through this kind of mode is thicker for material cost is higher, and the spiral case part is the dysmorphism piece in addition, and the welding degree of difficulty is big, and production efficiency is low, also is inconvenient for overhaul the maintenance after the integral forming.
Disclosure of Invention
The technical problem to be solved by the utility model is as follows: the volute of the existing cooling tower fan is integrally welded and formed, welding stress and thermal deformation exist in welding, so that the volute manufactured by the method is thick in material and high in material cost, and the volute part is a special-shaped part, so that the welding difficulty is high, the production efficiency is low, and the volute is not convenient to overhaul and maintain after being integrally formed.
In order to solve the problems, the technical scheme adopted by the utility model is as follows: a volute device of a centrifugal fan of a blowing cooling tower comprises supporting cover plates and a shell plate positioned between the two supporting cover plates; volute fixing holes distributed in an Archimedes line are formed in the supporting cover plate; an air inlet hole is formed in the middle of the supporting cover plate, and an air collector is arranged on the air inlet hole; screw technological holes are formed in the two sides of the shell plate; the shell plate is connected with the volute fixing hole on the corresponding support cover plate through a screw tooth process hole by adopting a screw or a rivet to form a volute structure.
The beneficial effects of the utility model are as follows: the manufacturing difficulty of the blower volute of the blower cooling tower can be greatly reduced, the production efficiency is improved, the production cost is reduced, and the installation and the maintenance are convenient.
As a further improvement of the utility model, the technical problems to be solved are as follows: the wind collector of the existing fan volute is generally connected with a side plate in a welding mode, so that the assembly and the disassembly are inconvenient.
In order to solve the technical problems, the utility model further adopts the following improved technical scheme: the periphery of the air inlet hole is distributed with air collector fixing holes; the wind collector is connected with the wind collector fixing hole on the corresponding supporting cover plate through the mounting hole on the edge of the wind collector by adopting a screw or a rivet.
The beneficial effects produced by the improvement are as follows: the connection of the wind collector and the side plate does not need welding, and the wind collector can be quickly installed through screws or rivets and is convenient to disassemble.
As a further improvement of the utility model, the technical problems to be solved are as follows: the problem of the shell plate be not convenient for with the connection of curb plate is solved.
In order to solve the technical problems, the utility model further adopts the following improved technical scheme: the number and pitch of the spiral technological holes are consistent with those of the spiral fixing holes on the supporting cover plate.
The beneficial effects produced by the improvement are as follows: when the spiral case is installed, the spiral tooth process holes on the shell plate are aligned to the spiral case fixing holes on the cover plate in turn, then the self-tapping screws are tapped, and the thin flat plate can be bent to form the spiral case.
As a further improvement of the utility model, the technical problems to be solved are as follows: the strength of the supporting cover plate is not high, resulting in easy deformation.
In order to solve the technical problems, the utility model further adopts the following improved technical scheme: and the edge of the supporting cover plate is provided with a folded edge facing to the same side.
The beneficial effects produced by the improvement are as follows: after the edge of the supporting cover plate is provided with the folded edge, the effect of supporting the whole volute is achieved, the volute support is not needed to be additionally designed, the supporting strength of the supporting cover plate can be improved, and meanwhile deformation is not easy to occur.
Drawings
Fig. 1 is a schematic view of a conventional blowing cooling tower.
Fig. 2 is a schematic diagram of a volute structure of a conventional blower.
Fig. 3 is a schematic diagram of a volute structure of a fan according to the present invention.
Fig. 4 is an exploded view of the volute of the blower of the present invention.
Fig. 5 is a schematic view of a side plate structure.
Fig. 6 is a schematic perspective view of a side plate.
FIG. 7 is a schematic diagram of a volute plate structure.
Fig. 8 is an enlarged structural diagram of a part a in fig. 7.
The character label in the figure is expressed as 2, centrifugal fan; 3. a fan volute; 4. an air inlet; 5. an air outlet; 31. a shell plate; 32. a support cover plate; 33. an air collector; 34. archimedes line; 35. a volute fixing hole; 36. a wind collector fixing hole; 37. an air inlet hole; 38. folding edges; 39. and (5) forming a screw tooth process hole.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings in order to make those skilled in the art better understand the technical solution of the present invention, and the description in this section is only exemplary and illustrative, and should not be construed as limiting the scope of the present invention in any way.
Example 1:
as shown in fig. 3-8, a volute apparatus of a centrifugal fan of a blower cooling tower comprises a supporting cover plate 32 and a shell plate 31 located between the two supporting cover plates 32; the support cover plate 32 is provided with volute fixing holes 35 distributed in an Archimedes line 34; an air inlet hole 37 is formed in the middle of the supporting cover plate 32, and an air collector 33 is arranged on the air inlet hole 37; screw technological holes 39 are formed in the two sides of the shell plate 31; the shell plate 31 is connected with the volute fixing hole 35 on the corresponding support cover plate 32 through a screw tooth process hole 39 by screws or rivets to form a volute structure.
The supporting cover plate 32 is formed by cutting, stamping and bending a single plate integrally, a volute fixing hole and a fan air inlet which are calculated according to the Archimedes spiral design are formed in the supporting cover plate, and the smaller the distance between the volute fixing holes is, the more accurate the size of the formed volute is.
The shell plate 31 is a whole thin plate formed by cutting and stamping, and the thinner the plate is, the lower the cost is, the more easily the plate is bent and deformed, and the more conveniently the plate is installed and manufactured on the premise of ensuring the strength. The two sides of the upper part are provided with screw tooth process holes through a screw tooth process. The number and pitch of the spiral tooth process holes are consistent with the number and pitch of the spiral case fixing holes on the spiral case supporting cover plate, when the spiral case is installed, the spiral tooth process holes on the flat plate are only needed to be aligned with the spiral case fixing holes on the spiral case supporting cover plate in a single turn, then self-tapping screws are tapped, and the thin flat plate can be bent and formed into the spiral case.
The screw technological hole is punched by a screw die, the screw die comprises an upper die and a lower die, the lower die punches the flat plate, and the upper die presses the flat plate down to form the screw technological hole.
Example 2:
as shown in fig. 4, the optimization is further performed on the basis of the above embodiment: a volute device of a centrifugal fan of a blast type cooling tower comprises a support cover plate 32 and a shell plate 31 positioned between the two support cover plates 32; the support cover plate 32 is provided with volute fixing holes 35 distributed in an Archimedes line 34; an air inlet hole 37 is formed in the middle of the supporting cover plate 32, and an air collector 33 is arranged on the air inlet hole 37; screw technological holes 39 are formed in the two sides of the shell plate 31; the shell plate 31 is connected with the volute fixing hole 35 on the corresponding support cover plate 32 through a screw tooth process hole 39 by screws or rivets to form a volute structure. Air collector fixing holes 36 are distributed around the air inlet holes 37; the wind collectors 33 are connected with the wind collector fixing holes 36 on the corresponding support cover plate 32 through mounting holes on the edges of the wind collectors by screws or rivets.
Example 3:
as shown in fig. 5-6, further optimization is performed on the basis of the above embodiments: a volute device of a centrifugal fan of a blast type cooling tower comprises a support cover plate 32 and a shell plate 31 positioned between the two support cover plates 32; the support cover plate 32 is provided with volute fixing holes 35 distributed in an Archimedes line 34; an air inlet hole 37 is formed in the middle of the supporting cover plate 32, and an air collector 33 is arranged on the air inlet hole 37; both sides of the shell plate 31 are provided with screw tooth process holes 39; the shell plate 31 is connected with the volute fixing hole 35 on the corresponding support cover plate 32 through a screw tooth process hole 39 by screws or rivets to form a volute structure. The number and pitch of the spiral process holes 39 are consistent with the number and pitch of the volute fixing holes 35 on the support cover plate 32.
Example 4:
as shown in fig. 3-7, further optimization is performed on the basis of the above embodiments: a volute device of a centrifugal fan of a blast type cooling tower comprises a support cover plate 32 and a shell plate 31 positioned between the two support cover plates 32; the support cover plate 32 is provided with volute fixing holes 35 distributed in an Archimedes line 34; an air inlet hole 37 is formed in the middle of the supporting cover plate 32, and an air collector 33 is arranged on the air inlet hole 37; screw technological holes 39 are formed in the two sides of the shell plate 31; the shell plate 31 is connected with the volute fixing hole 35 on the corresponding support cover plate 32 through a screw tooth process hole 39 by screws or rivets to form a volute structure. The edge of the support cover 32 is provided with a flap 38 facing the same side.
The assembly process of the device is as follows:
when the device is installed, two sides of the shell plate 31 are fixed on the support cover plate 32 through the spiral tooth process hole 39 and the volute fixing hole 35 through screws or rivets to form the volute, then the centrifugal fan 2 is fixed on a fan shaft and penetrates through the air inlet hole 37 on the support cover plate 32 to fix the fan in the volute, and finally the rivet hole of the air collector 33 is aligned with the air collector fixing hole of the volute support cover plate 32 and is fixed through the screws or the rivets.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present invention, and the above technical features may be combined in a suitable manner; such modifications, variations, or combinations, or other applications of the inventive concepts and solutions as may be employed without such modifications, are intended to be included within the scope of the present invention.
Claims (4)
1. The utility model provides a spiral case device of forced draft cooling tower centrifugal fan which characterized in that: comprises supporting cover plates (32) and a shell plate (31) positioned between the two supporting cover plates (32); volute fixing holes (35) distributed in Archimedes lines (34) are formed in the supporting cover plate (32); an air inlet hole (37) is formed in the middle of the supporting cover plate (32), and an air collector (33) is arranged on the air inlet hole (37); screw technological holes (39) are formed in the two sides of the shell plate (31); the shell plate (31) is connected with a volute fixing hole (35) on the corresponding support cover plate (32) through a spiral tooth process hole (39) by adopting a screw or a rivet to form a volute structure.
2. The volute apparatus of a centrifugal fan for a blower cooling tower as defined in claim 1, wherein: air collector fixing holes (36) are distributed around the air inlet holes (37); the wind collector (33) is connected with a wind collector fixing hole (36) on the corresponding supporting cover plate (32) through a mounting hole on the edge of the wind collector by adopting a screw or a rivet.
3. The volute apparatus of a centrifugal fan for a blower cooling tower as defined in claim 1, wherein: the number and pitch of the spiral process holes (39) are consistent with those of the spiral case fixing holes (35) on the support cover plate (32).
4. The volute apparatus of a centrifugal fan for a blower cooling tower as defined in claim 1, wherein: the edge of the supporting cover plate (32) is provided with a folded edge (38) facing the same side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122290345.3U CN216975333U (en) | 2021-09-22 | 2021-09-22 | Volute device of centrifugal fan of blowing-type cooling tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122290345.3U CN216975333U (en) | 2021-09-22 | 2021-09-22 | Volute device of centrifugal fan of blowing-type cooling tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216975333U true CN216975333U (en) | 2022-07-15 |
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ID=82338877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122290345.3U Active CN216975333U (en) | 2021-09-22 | 2021-09-22 | Volute device of centrifugal fan of blowing-type cooling tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216975333U (en) |
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2021
- 2021-09-22 CN CN202122290345.3U patent/CN216975333U/en active Active
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