CN112664469A

CN112664469A - Centrifugal axial flow fan

Info

Publication number: CN112664469A
Application number: CN202011537353.7A
Authority: CN
Inventors: 陈兴龙
Original assignee: Zhejiang Longxin Fan Co ltd
Current assignee: Nantong Beite Fan Engineering Co.,Ltd.
Priority date: 2020-12-23
Filing date: 2020-12-23
Publication date: 2021-04-16
Anticipated expiration: 2040-12-23
Also published as: CN112664469B

Abstract

The invention discloses a centrifugal axial flow fan which comprises a centrifugal machine shell, wherein a first fixing plate is arranged inside the centrifugal machine shell, a second fixing plate is arranged at the upper end of the first fixing plate, a driving motor is arranged between the first fixing plate and the second fixing plate, a telescopic rod is arranged on the outer wall of the second fixing plate, a fixing pipe is arranged on the outer side of the telescopic rod, a first spring is arranged on the outer side of the telescopic rod and positioned at the lower end of the fixing pipe, and two fixing structures are symmetrically arranged in the first fixing plate and the second fixing plate. The invention relates to a centrifugal axial flow fan, which belongs to the field of fans, and can be convenient for the installation and the disassembly of the centrifugal axial flow fan by arranging a square fixed rod and arranging a threaded column at the inner end of the square fixed rod; the anti-falling fixture block and the second spring are arranged, so that the square fixing rod can be conveniently fixed, and the square fixing rod is prevented from loosening; through setting up fixed plate and No. two fixed plates, driving motor's dismouting can be convenient for.

Description

Centrifugal axial flow fan

Technical Field

The invention relates to the field of fans, in particular to a centrifugal axial flow fan.

Background

Axial fans are widely used, namely, air flows in the same direction as the axis of the fan blade, such as electric fans, and fans outside air conditioners are axial fans which are called axial fans because air flows parallel to the axis of the fan, and the axial fans are generally used in occasions with high flow requirements and low pressure requirements. The axial flow fan is fixed at a position and enables air to move, the axial flow fan mainly comprises a fan impeller and a casing, the structure is simple, but the data requirement is very high, the common axial flow fan can be used for ventilation in places such as general factories, warehouses, offices, houses and the like, and can also be used for air coolers, evaporators, condensers, spray precipitation and the like, the mining axial flow fan also has an anti-corrosion and anti-explosion axial flow fan which adopts anti-corrosion materials and anti-explosion measures and is matched with an anti-explosion motor and can be used for conveying gases which are easy to explode, volatile and corrosive, when the impeller rotates, the gases axially enter the impeller from an air inlet, are pushed by blades on the impeller to enable the energy of the gases to be increased and then flow into a guide vane, the guide vane changes the deflected airflow into axial flow, and simultaneously guides the gases into a diffuser pipe to further convert the kinetic energy of the gases, the axial flow fan blades work in a similar manner to the wings of an aircraft, but in the latter, lift is applied upwards to the wings and supports the weight of the aircraft, while the axial flow fan is fixed in position and moves the air, the cross section of the axial flow fan is generally an airfoil section, the blades can be fixed in position and also can rotate around the longitudinal axis thereof, the angle between the blades and the airflow or the blade pitch can be unadjustable or adjustable, changing the blade angle or pitch is one of the main advantages of the axial flow fan, the small blade pitch angle produces a lower flow rate, and increasing the pitch produces a higher flow rate; the existing centrifugal axial flow fan is installed through a plurality of bolts when being used and installed, the installation and the disassembly efficiency of the centrifugal axial flow fan are low due to the installation mode, meanwhile, the centrifugal axial flow fan can vibrate in the working process, the bolts can be loosened easily when being installed through the bolts, then the centrifugal axial flow fan is enabled to generate abnormal sound, the driving motor of the existing centrifugal axial flow fan is detached in the shell of the centrifugal fan more complexly, and the overhauling efficiency of the driving motor is low.

Disclosure of Invention

The invention mainly aims to provide a centrifugal axial flow fan which can effectively solve the problems in the background art.

In order to achieve the purpose, the invention adopts the technical scheme that:

a centrifugal axial flow fan comprises a centrifugal machine shell, wherein a first fixing plate is arranged inside the centrifugal machine shell, a second fixing plate is arranged at the upper end of the first fixing plate, a driving motor is arranged between the first fixing plate and the second fixing plate, a telescopic rod is arranged on the outer wall of the second fixing plate, a fixing pipe is arranged on the outer side of the telescopic rod, a first spring is arranged at the lower end of the fixing pipe on the outer side of the telescopic rod, two fixing structures are symmetrically arranged in the first fixing plate and the second fixing plate, four rotating structures are symmetrically arranged on the outer side of the centrifugal machine shell, two square fixing rods are symmetrically arranged on the left side and the right side of each rotating structure, the inner ends of the eight square fixing rods are respectively provided with a threaded column, two connecting pipes are symmetrically arranged at the left end and the right end of the centrifugal machine shell, and four anti-falling clamping, and a second spring is arranged on the inner sides of the eight anti-falling clamping blocks.

Preferably, the left end and the right end of the centrifuge shell are symmetrically provided with two first connecting plates, the two first connecting plates are symmetrically provided with four first square holes, the eight first square holes respectively penetrate through the inner ends and the outer ends of the two first connecting plates, the outer wall of the centrifuge shell is symmetrically provided with four connecting blocks, and the four connecting blocks are provided with lantern rings.

Preferably, a fixed plate and No. two fixed plates are arc structures, a fixed slot has all been seted up on the inner wall of a fixed plate and No. two fixed plates, two spread grooves have all been seted up to the equal symmetry in inner of a fixed plate and No. two fixed plates, four a circular groove of accomodating has all been seted up on the inner wall of spread groove, be provided with a support column on the outer wall of a fixed plate, the support column that a fixed plate set up on through its outer wall links to each other with the inner wall of centrifuge housing, the symmetry is provided with two fixed fixture blocks, two on driving motor's the outer wall fixed fixture block imbeds respectively in two fixed slot seted up on a fixed plate and No. two fixed plate inner walls.

Preferably, the one end of telescopic link is provided with the anticreep board, fixed pipe links to each other with the inner wall of centrifuge shell, the inside of fixed pipe has been seted up and has been accomodate the chamber, accomodate and seted up the through-hole on the inner wall in chamber, the through-hole will be accomodate the chamber and run through with the one end of fixed pipe, the anticreep board is being located the intracavity of accomodating that the fixed intraductal was seted up, the telescopic link passes the through-hole of seting up on the fixed pipe and links to each other with the anticreep board, the one end of a spring links to each other with fixed pipe, the other.

Preferably, two fixed knot constructs all to be installed in the spread groove of seting up in fixed plate and No. two fixed plate the both ends of fixed knot constructs all the symmetry is provided with two anticreep posts, four anticreep posts install respectively on fixed plate and No. two fixed plates four circular holding inslot of seting up symmetrically.

Preferably, four mounting grooves are formed in the outer wall of each rotating structure, the four rotating structures are mounted on the four lantern rings respectively through the mounting grooves formed in the outer wall of each rotating structure, a thread groove is formed in each rotating structure, and the four thread grooves penetrate through the left end and the right end of each rotating structure respectively.

Preferably, the eight square fixing rods are respectively located in eight first square holes symmetrically formed in two first connecting plates, the inner ends of the eight square fixing rods are provided with an anti-falling clamping groove, and eight threaded columns arranged at the inner ends of the eight square fixing rods are symmetrically arranged in threaded grooves formed in the four rotating structures in a pairwise manner.

Preferably, two the inner of connecting pipe all is provided with a connecting plate No. two, two equal symmetry has seted up four quad slit No. two on the connecting plate No. two, two equal symmetry is provided with four on the outer wall of connecting pipe and accomodates the piece, eight a square chamber has all been seted up to the inside of accomodating the piece, eight a square flexible hole has all been seted up to the outer end of accomodating the piece, eight square chamber that eight accomodate the piece in the piece and eight outer end of accomodating the piece are run through respectively to square flexible hole eight two connection spout, sixteen have all been seted up symmetrically on the inner wall of the left and right sides in square chamber eight connect the spout respectively with eight square chamber and eight of accomodating the inside seting of piece the outer wall of accomodating the piece runs through.

Preferably, eight the inner of anticreep fixture block all is provided with a square cardboard, eight square cardboard sets up respectively and accomodates eight square intracavity that the piece was seted up in eight, eight the anticreep fixture block passes eight square flexible holes that accomodate the piece outer end and seted up respectively and links to each other with eight square cardboard, eight No. two springs set up respectively and accomodate eight the eight square intracavity that the piece was seted up in eight respectively, eight No. two springs are located the inboard of eight square cardboard respectively, eight all the symmetry is provided with two on the square cardboard and presses the clamp plate, eighteen press the clamp plate to be located sixteen connection spouts that eight accomodate the piece and set up respectively.

Compared with the prior art, the invention has the following beneficial effects:

1. the installation and the disassembly of the centrifugal axial flow fan can be facilitated by arranging the square fixing rod and arranging the threaded column at the inner end of the square fixing rod;

2. by arranging the rotating structure, the square fixing rod can be conveniently pushed to move;

3. the anti-falling fixture block and the second spring are arranged, so that the square fixing rod can be conveniently fixed, and the square fixing rod is prevented from loosening;

4. the first fixing plate and the second fixing plate are arranged, so that the driving motor can be conveniently disassembled and assembled, and the maintenance efficiency of the driving motor is conveniently improved;

5. through setting up telescopic link and spring, can be convenient for reciprocating of No. two fixed plates.

Drawings

FIG. 1 is a schematic view of the overall structure of a centrifugal axial flow fan according to the present invention;

FIG. 2 is a schematic structural view of a centrifuge housing of a centrifugal axial flow fan according to the present invention;

FIG. 3 is a schematic structural view of a first fixing plate of the centrifugal axial flow fan of the present invention;

FIG. 4 is a schematic structural view of a position relationship between a second fixing plate and a telescopic rod of the centrifugal axial flow fan of the present invention;

FIG. 5 is a schematic diagram of a structure of a rotational structure of a centrifugal axial flow fan according to the present invention and a structure of a position relationship between a square fixing rod and the rotational structure;

FIG. 6 is a schematic structural diagram of a connecting pipe of a centrifugal axial flow fan according to the present invention;

fig. 7 is a schematic structural view of an anti-dropping fixture block of a centrifugal axial flow fan according to the present invention.

In the figure: 1. a centrifuge housing; 2. a first fixing plate; 3. a telescopic rod; 4. a fixed structure; 5. a rotating structure; 6. a square fixing rod; 7. a connecting pipe; 8. an anti-falling clamping block; 9. a first connecting plate; 10. a first square hole; 11. connecting blocks; 12. a collar; 13. fixing the clamping groove; 14. connecting grooves; 15. a circular receiving groove; 16. a support pillar; 17. a drive motor; 18. fixing the fixture block; 19. a second fixing plate; 20. an anti-drop plate; 21. a fixed tube; 22. a receiving cavity; 23. a through hole; 24. a first spring; 25. an anti-drop column; 26. installing a groove; 27. a thread groove; 28. an anti-drop clamping groove; 29. a threaded post; 30. a second connecting plate; 31. a second square hole; 32. receiving the block; 33. a square cavity; 34. a square telescopic hole; 35. connecting the sliding chute; 36. a square clamping plate; 37. a pressing plate; 38. and a second spring.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-7, a centrifugal axial flow fan comprises a centrifuge housing 1, a first fixing plate 2 is arranged inside the centrifuge housing 1, a second fixing plate 19 is arranged at the upper end of the first fixing plate 2, a driving motor 17 is arranged between the first fixing plate 2 and the second fixing plate 19, a telescopic rod 3 is arranged on the outer wall of the second fixing plate 19, a fixing tube 21 is arranged outside the telescopic rod 3, a first spring 24 is arranged at the lower end of the fixing tube 21 outside the telescopic rod 3, two fixing structures 4 are symmetrically arranged in the first fixing plate 2 and the second fixing plate 19, four rotating structures 5 are symmetrically arranged outside the centrifuge housing 1, two square fixing rods 6 are symmetrically arranged at the left side and the right side of the four rotating structures 5, a threaded column 29 is arranged at the inner ends of the eight square fixing rods 6, two connecting tubes 7 are symmetrically arranged at the left end and the right end of the centrifuge housing 1, four anti-falling fixture blocks 8 are symmetrically arranged on the two connecting pipes 7, and a second spring 38 is arranged on the inner sides of the eight anti-falling fixture blocks 8.

In this embodiment, centrifuge housing 1's left and right sides both ends symmetry is provided with connecting plate 9 for two, and equal symmetry has seted up square hole 10 for four on connecting plate 9 for two, and eight square holes 10 run through the inside and outside both ends of connecting plate 9 for two respectively, and the symmetry is provided with four connecting blocks 11 on centrifuge housing 1's the outer wall, all is provided with a lantern ring 12 on four connecting blocks 11.

In this embodiment, in order to facilitate the maintenance of driving motor 17, a fixed plate 2 and No. two fixed plates 19 have been set up, a fixed plate 2 and No. two fixed plates 19 are the arc structure, a fixed slot 13 has all been seted up on the inner wall of a fixed plate 2 and No. two fixed plates 19, two spread grooves 14 have all been seted up to the equal symmetry in inner of a fixed plate 2 and No. two fixed plates 19, a circular groove 15 of accomodating has all been seted up on the inner wall of four spread grooves 14, be provided with a support column 16 on the outer wall of a fixed plate 2, a fixed plate 2 links to each other with centrifuge housing 1's inner wall through the support column 16 that sets up on its outer wall, the symmetry is provided with two fixed fixture blocks 18 on driving motor 17's the outer wall, two fixed fixture blocks 18 imbed respectively in two fixed slot 13 of seting on a fixed plate.

In this embodiment, in order to facilitate the up-and-down movement of the second fixing plate 19, the telescopic rod 3 is provided, the first spring 24, one end of the telescopic rod 3 is provided with the anti-dropping plate 20, the fixing tube 21 is connected with the inner wall of the centrifuge housing 1, the accommodating cavity 22 is provided inside the fixing tube 21, the through hole 23 is provided on the inner wall of the accommodating cavity 22, the through hole 23 is used for accommodating the one end of the cavity 22 and the fixing tube 21 and penetrating through, the anti-dropping plate 20 is located in the accommodating cavity 22 provided in the fixing tube 21, the telescopic rod 3 penetrates through the through hole 23 provided on the fixing tube 21 and is connected with the anti-dropping plate 20, one end of the first spring 24 is connected with the fixing tube 21, and the other end of the.

In this embodiment, in order to facilitate fixing No. two fixed plates 19 on No. one fixed plate 2, fixed knot constructs 4 have been set up, and two fixed knot constructs 4 are all installed in the spread groove 14 that No. one fixed plate 2 and No. two fixed plates 19 the inner was seted up, and two equal symmetries in both ends of two fixed knot constructs 4 are provided with two anticreep posts 25, and four anticreep posts 25 are installed respectively in four circular holding grooves 15 that the symmetry was seted up on No. one fixed plate 2 and No. two fixed plates 19.

In this embodiment, in order to facilitate promoting the square dead lever 6 and remove, set up revolution mechanic 5, all seted up a mounting groove 26 on four revolution mechanic 5's the outer wall, four revolution mechanic 5 all install respectively on four lantern rings 12 through the mounting groove 26 of seting up on its outer wall, a thread groove 27 has all been seted up to four revolution mechanic 5's inside, and four thread grooves 27 run through four revolution mechanic 5's both ends about respectively.

In this embodiment, in order to facilitate the installation and the disassembly of the fan, the square fixing rods 6 are arranged, the eight square fixing rods 6 are respectively located in eight first square holes 10 symmetrically formed in two first connecting plates 9, the inner ends of the eight square fixing rods 6 are respectively provided with an anti-falling clamping groove 28, and eight threaded columns 29 arranged at the inner ends of the eight square fixing rods 6 are symmetrically arranged in threaded grooves 27 formed in the four rotating structures 5.

In this embodiment, all be provided with a connecting plate 30 No. two for the inner of two connecting pipes 7, equal symmetry has been seted up four quad slit 31 No. two on two connecting plates 30, equal symmetry is provided with four on the outer wall of two connecting pipes 7 and accomodates piece 32, a square chamber 33 has all been seted up to eight inside of accomodating piece 32, a square flexible hole 34 has all been seted up to eight outer ends of accomodating piece 32, eight square flexible holes 34 run through eight square chamber 33 that set up in eight accomodating piece 32 and eight outer ends of accomodating piece 32 respectively, two connection spout 35 have all been seted up to equal symmetry on the inner wall of the left and right sides of eight square chamber 33, sixteen connection spout 35 runs through eight square chamber 33 that eight were accomodate piece 32 inside to eight and eight outer wall of accomodating piece 32 respectively.

In this embodiment, in order to facilitate the fixing of square dead lever 6, thereby prevent that square dead lever 6 is not hard up, anti-disengaging fixture block 8 and No. two springs 38 have been set up, eight anti-disengaging fixture block 8 the inner all is provided with a square cardboard 36, eight square cardboard 36 sets up respectively in eight square chambeies 33 of accomodating the inside seting up of piece 32, eight anti-disengaging fixture block 8 passes eight square flexible holes 34 and eight square cardboard 36 that the piece 32 outer end was seted up of accomodating respectively and links to each other, eight No. two springs 38 set up respectively in eight square chambeies 33 of accomodating the inside seting up of piece 32, eight No. two springs 38 are located the inboard of eight square cardboard 36 respectively, all the symmetry is provided with two on eight square cardboard 36 and presses the board 37, eighteen presses the board 37 to be located sixteen connecting chutes 35 of seting up on eight piece.

It should be noted that, in the use process of the centrifugal axial flow fan, when the driving motor 17 needs to be overhauled, the pressing plate 37 is pressed inward, at this time, the square clamping plate 36 drives the anti-falling clamping block 8 to move inward, and finally the anti-falling clamping block 8 is separated from the anti-falling clamping groove 28, then the rotating structure 5 rotates, at this time, the threaded column 29 at the inner end of the square fixing rod 6 moves into the threaded groove 27, when the inner end of the square fixing rod 6 contacts with the rotating structure 5, the rotating structure 5 stops rotating, at this time, the centrifugal fan housing 1 is detached from between the two connecting pipes 7, at this time, the two fixing structures 4 are taken out from the first fixing plate 2 and the second fixing plate 19, then the second fixing plate 19 is pushed upward, at this time, the telescopic rod 3 is retracted into the accommodating cavity 22, the first spring 24 is compressed, and finally the driving motor 17 is detached from between the first fixing plate 2 and the second fixing plate 19 to start overhauling.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A centrifugal axial flow fan characterized in that: the novel centrifugal machine comprises a centrifugal machine shell (1), wherein a first fixing plate (2) is arranged inside the centrifugal machine shell (1), a second fixing plate (19) is arranged at the upper end of the first fixing plate (2), a driving motor (17) is arranged between the first fixing plate (2) and the second fixing plate (19), a telescopic rod (3) is arranged on the outer wall of the second fixing plate (19), a fixing pipe (21) is arranged on the outer side of the telescopic rod (3), a first spring (24) is arranged at the lower end, located on the fixing pipe (21), of the outer side of the telescopic rod (3), two fixing structures (4) are symmetrically arranged in the first fixing plate (2) and the second fixing plate (19), four rotating structures (5) are symmetrically arranged on the outer side of the centrifugal machine shell (1), and two square fixing rods (6) are symmetrically arranged on the left side and the right side of each rotating structure (5), eight the inner of square dead lever (6) all is provided with a screw thread post (29), two connecting pipes (7) are installed to the left and right sides both ends symmetry of centrifuge housing (1), two equal symmetry is provided with four anticreep fixture blocks (8) on connecting pipe (7), eight the inboard of anticreep fixture block (8) all is provided with a No. two spring (38).

2. The centrifugal axial flow fan according to claim 1, wherein: the left and right ends of the centrifuge shell (1) are symmetrically provided with two first connecting plates (9) and two first square holes (10) are symmetrically formed in the first connecting plates (9) and eight the first square holes (10) respectively penetrate through the inner ends and the outer ends of the two first connecting plates (9), four connecting blocks (11) and four connecting blocks (12) are symmetrically arranged on the outer wall of the centrifuge shell (1) and are arranged on the connecting blocks (11).

3. The centrifugal axial flow fan according to claim 2, wherein: the first fixing plate (2) and the second fixing plate (19) are both arc-shaped structures, the inner walls of the first fixing plate (2) and the second fixing plate (19) are both provided with a fixing clamping groove (13), the inner ends of the first fixing plate (2) and the second fixing plate (19) are symmetrically provided with two connecting grooves (14), the inner walls of the four connecting grooves (14) are provided with a circular accommodating groove (15), a supporting column (16) is arranged on the outer wall of the first fixing plate (2), the first fixing plate (2) is connected with the inner wall of the centrifuge shell (1) through a support column (16) arranged on the outer wall of the first fixing plate, two fixing clamping blocks (18) are symmetrically arranged on the outer wall of the driving motor (17), and the two fixing clamping blocks (18) are respectively embedded into two fixing clamping grooves (13) formed in the inner walls of the first fixing plate (2) and the second fixing plate (19).

4. A centrifugal axial flow fan according to claim 3, wherein: the one end of telescopic link (3) is provided with anticreep board (20), fixed pipe (21) link to each other with the inner wall of centrifuge housing (1), the inside of fixed pipe (21) has been seted up and has been accomodate chamber (22), through-hole (23) have been seted up on the inner wall of accomodating chamber (22), through-hole (23) will be accomodate chamber (22) and the one end of fixed pipe (21) and run through, anticreep board (20) are being located accomodate chamber (22) of seting up in fixed pipe (21), through-hole (23) that offer on fixed pipe (21) are passed in telescopic link to each other with anticreep board (20) in telescopic link (3), the one end of a spring (24) links to each other with fixed pipe (21), the other end of a spring (24) links to each other with the outer wall of No. two fixed plates (19.

5. The centrifugal axial flow fan according to claim 4, wherein: two fixed knot constructs (4) all install in spread groove (14) that a fixed plate (2) and No. two fixed plate (19) inner was seted up, two the equal symmetry in both ends of fixed knot structure (4) is provided with two anticreep posts (25), four anticreep post (25) are installed respectively on a fixed plate (2) and No. two fixed plate (19) four circular receipts of seting up in groove (15).

6. The centrifugal axial flow fan according to claim 5, wherein: four all seted up one mounting groove (26) on the outer wall of revolution mechanic (5), four revolution mechanic (5) are all installed respectively on four lantern rings (12) through mounting groove (26) of seting up on its outer wall, four a thread groove (27) has all been seted up to the inside of revolution mechanic (5), four thread groove (27) are run through four revolution mechanic (5) both ends about respectively.

7. The centrifugal axial flow fan according to claim 6, wherein: the eight square fixing rods (6) are respectively positioned in eight first square holes (10) symmetrically formed in two first connecting plates (9), one anti-falling clamping groove (28) is formed in the inner ends of the eight square fixing rods (6), and eight threaded columns (29) arranged at the inner ends of the eight square fixing rods (6) are symmetrically arranged in threaded grooves (27) formed in the four rotating structures (5) in a pairwise mode.

8. The centrifugal axial flow fan according to claim 7, wherein: the inner ends of the two connecting pipes (7) are respectively provided with a second connecting plate (30), the two second connecting plates (30) are symmetrically provided with four second square holes (31), the outer walls of the two connecting pipes (7) are respectively symmetrically provided with four accommodating blocks (32), the insides of the eight accommodating blocks (32) are respectively provided with a square cavity (33), the outer ends of the eight accommodating blocks (32) are respectively provided with a square telescopic hole (34), the eight square telescopic holes (34) respectively penetrate through the eight square cavities (33) arranged in the eight accommodating blocks (32) and the outer ends of the eight accommodating blocks (32), and the inner walls of the left side and the right side of the eight square cavities (33) are respectively symmetrically provided with two connecting chutes (35), sixteen connecting chutes (35) respectively penetrate eight square cavities (33) formed in the eight accommodating blocks (32) and the outer walls of the eight accommodating blocks (32).

9. The centrifugal axial flow fan according to claim 8, wherein: eight anticreep fixture block (8) inner all is provided with one square cardboard (36), eight square cardboard (36) set up respectively in eight square chambeies (33) of accomodating the inside seting up of piece (32), eight anticreep fixture block (8) pass respectively and accomodate eight square telescopic holes (34) that the piece (32) outer end was seted up and link to each other with eight square cardboard (36), eight No. two spring (38) set up respectively in eight square chambeies (33) of accomodating the inside seting up of piece (32), eight No. two spring (38) are located the inboard of eight square cardboard (36) respectively, eight all the symmetry is provided with two on square cardboard (36) and presses clamp plate (37), eighteen press clamp plate (37) to be located sixteen connecting sliding groove (35) of seting up on eight receipts piece (32) respectively.