CN216867043U - Efficient energy-saving fan for medium-flow and medium-high pressure material conveying - Google Patents

Abstract

The utility model relates to the technical field of material conveying fans, in particular to a medium-flow and medium-high pressure material conveying efficient energy-saving fan which comprises a fan body, wherein the fan body comprises a base, a support is fixedly arranged on the top surface of the base, a motor is fixedly arranged on the top surface of the support, a shell is fixedly connected to the front side of the support, an impeller body is movably arranged in the fan body and comprises a blade disc, the front end of the motor is fixedly connected with the blade disc, a first mounting groove is formed in the front wall of the blade disc, and a second mounting groove is formed in the left side of the first mounting groove. The fan provided by the utility model can protect the surface of the blade by arranging the protection structure, so that the strength of the blade is effectively improved, the service life of the blade is prolonged, and meanwhile, only one group of the protection shell needs to be replaced without replacing the whole protection shell, so that the maintenance cost is saved, and the production efficiency is improved.

Description

Efficient energy-saving fan for medium-flow and medium-high pressure material conveying

Technical Field

The utility model relates to the technical field of material conveying fans, in particular to a medium-flow and medium-high pressure efficient energy-saving material conveying fan.

Background

Centrifugal fans are driven fluid machines that rely on input of mechanical energy to increase the pressure of the gas and expel the gas. Centrifugal fans are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and draught of boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; drying and selecting grains. The centrifugal fan accelerates gas by using an impeller rotating at a high speed according to the principle that kinetic energy is converted into potential energy, and then decelerates and changes the flow direction so as to convert the kinetic energy into the potential energy (pressure). In a single stage centrifugal fan, the gas enters the impeller from an axial direction, changes to a radial direction as it flows through the impeller, and then enters the diffuser. In diffusers, the gas changes flow direction and the increase in conduit cross-sectional area slows the gas flow, which converts kinetic energy into pressure energy. The pressure increase occurs primarily in the impeller and secondarily in the diffusion process. In a multistage centrifugal fan, a flow reverser is used to direct the air flow to the next impeller, creating a higher pressure.

However, when the existing fan is used for conveying materials, the windward side of the blade is continuously rubbed and impacted by solid particles, so that the blade is abraded, and meanwhile, when corrosive gas is conveyed, the abrasion of the blade is aggravated, the dynamic balance of the fan is influenced by the abrasion of the blade, so that the vibration of a bearing of the fan is gradually increased, the noise is increased, and serious safety accidents can be caused if the fan is not maintained in time. At present, the blade is repaired mostly by adopting a surfacing wear-resistant alloy mode, but the blade body can be damaged, so that the strength of the blade is reduced, and meanwhile, the blade is limited by the thickness of the blade body, and the welding difficulty is high.

Therefore, in order to solve the problems, the efficient energy-saving fan for medium-flow and medium-high pressure material conveying is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a medium-flow and medium-high pressure material conveying efficient energy-saving fan, which aims to solve the problems that when the existing fan provided by the prior art conveys materials, the windward side of a blade is continuously rubbed and impacted by solid particles, so that the blade is abraded, and meanwhile, when corrosive gas is conveyed, the erosive abrasion of the blade is aggravated, the dynamic balance of the fan is influenced by the abrasion of the blade, so that the vibration of a bearing of the fan is gradually increased, the noise is increased, and serious safety accidents are caused if the fan is not maintained in time. Adopt build-up welding abrasion-resistant alloy mode to repair the blade at present mostly, nevertheless can harm the blade body, make blade intensity descend, receive the restriction of blade body thickness simultaneously, the problem that the welding degree of difficulty is high.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a be used for middle flow, high-pressure and high-efficient energy-conserving fan of material transport, includes the fan body, the fan body includes the base, the top surface fixed mounting of base has the support, the top surface fixed mounting of support has the motor, the front side fixedly connected with casing of support, the inside movable mounting of fan body has the impeller body, the impeller body includes the bladed disk, the front end fixedly connected with bladed disk of motor, seted up first mounting groove on the front wall of bladed disk, the left side of first mounting groove is seted up the second mounting groove, the downside of second mounting groove is seted up the third mounting groove, the back movable mounting of bladed disk has first bolt, the front fixed mounting of bladed disk has the blade, the front end fixed mounting of blade has solid fixed ring, the front movable mounting of solid fixed ring has the second bolt, install protective structure on the impeller body, protective structure includes the urceolus, the positive middle part movable mounting of leaf disc has the urceolus, the fixed welding in side of urceolus has the dead lever, the movable groove has been seted up to the inside of dead lever, the top fixedly connected with fixing base of dead lever, the inside movable mounting of fixing base has the protecting crust, seted up on the inside wall of protecting crust and accomodate the groove, seted up the spout on the back lateral wall of accomodating the groove, the top surface movable mounting of protecting crust has the third bolt, fixedly connected with connecting plate on the inside wall of fixing base, protective structure's internally mounted has regulation structure.

Preferably, the regulation structure includes a rotatory section of thick bamboo, the inboard threaded connection of urceolus has a rotatory section of thick bamboo, the positive fixed mounting of a rotatory section of thick bamboo has the hand wheel, the back wall fixedly connected with gear of a rotatory section of thick bamboo, the outside movable mounting of gear has the ring gear, the fixed welding of outer wall of ring gear has the fixed axle, the inboard movable mounting of fixed axle has the connecting rod, the inside movable mounting who accomodates the groove has the regulating plate, the left side movable mounting of regulating plate has the cab apron of crossing.

Preferably, the blades are located on the edge of the front face of the blade disc, a circular groove is formed in the middle of the front face of the blade disc, the outer cylinder is mounted inside the groove, the first mounting groove is communicated with the third mounting groove, and the second mounting groove is communicated with the third mounting groove and the groove.

Preferably, the front end of first bolt and the back lateral wall threaded connection of urceolus, the blade is the arc structure, the blade is the positive edge of circumference dress distribution at the bladed disk, gu fixed ring is the annular structure, the blade passes through second bolt fixed connection with solid fixed ring.

Preferably, the outer cylinder is of a cylindrical structure, the outer cylinder is sleeved at the front end of the motor, a through groove is formed in the side wall of the outer cylinder, and a thread groove is formed in the inner side wall of the outer cylinder.

Preferably, the dead lever is installed in the inside of second mounting groove, the front of dead lever and the front parallel and level of bladed disk, the inside at first mounting groove is installed to the fixing base, the front of fixing base and the front parallel and level of bladed disk, the fixing base is the arc structure.

Preferably, the inboard at the fixing base is installed to the protecting crust, the inboard at the protecting crust is installed to the blade, the protecting crust passes through third bolt fixed connection with the storage groove, the connecting plate is installed inside the third mounting groove, the front and the positive parallel and level of bladed disk of connecting plate.

Preferably, the rotary drum is of a cylindrical structure, the rotary drum is located on the outer side of the front end of the motor, the gear is of an annular structure, the gear is meshed with the gear ring, the connecting rod penetrates through the side wall of the outer cylinder through the through groove, and the connecting rod is movably connected with the outer cylinder.

Preferably, the middle section of the connecting rod is located on the inner side of the movable groove, the back of the adjusting plate is provided with a fixing column, the fixing column is located on the inner side of the sliding groove, and the top end of the connecting rod is movably connected with the fixing column on the back of the adjusting plate.

Preferably, the bottom of the transition plate is located at the bottom of the accommodating groove, the bottom of the adjusting plate is located in the middle of the back of the transition plate, the top of the transition plate is located in the middle of the adjusting plate, and the adjusting plate and the transition plate are both arc-shaped.

Compared with the prior art, the utility model has the beneficial effects that: the fan provided by the utility model can protect the surface of the blade by arranging the protection structure, so that the strength of the blade is effectively improved, the service life of the blade is prolonged, and meanwhile, when the protection shell is replaced, only a single group is replaced without replacing the whole protection shell, so that the maintenance cost is saved, and the production efficiency is improved.

Be provided with the protecting crust, the protecting crust cover is established in the outside of blade, can be to the surperficial omnidirectional protection of blade, effectively improve the intensity of blade, the life of extension blade, be provided with the dead lever, guarantee the joint strength between fixing base and the urceolus, make protective structure when the installation, the accessible is installed the urceolus in the front of bladed disk, can install ten groups of fixing base simultaneously, improve the convenience of installation, be provided with third bolt and second bolt, when changing the blade, only need dismantle corresponding second bolt and third bolt, can dismantle the single blade of group that damages, need not whole changes, thereby save cost of maintenance, and productivity ratio is improved.

Be provided with a rotatory section of thick bamboo, it is rotatory to drive a rotatory section of thick bamboo through rotatory hand wheel, the rotation of a rotatory section of thick bamboo can drive gear revolve simultaneously, the angle that makes the connecting rod deflects, be provided with the fixed column, make the deflection of connecting rod angle, the accessible fixed column drives the regulating plate angle and deflects, make the top of regulating plate expose from accomodating the inslot portion, the regulating plate can promote the cab apron and turn over out from accomodating the inslot portion simultaneously, make the inside wall of protecting crust crooked, reduce the interval between adjacent two sets of protecting crust terminals, reduce wind power loss, avoid appearing the maximum value in the middle of the H-Q curve, guarantee the stable operation of fan body, the production of noise reduction.

Drawings

FIG. 1 is a schematic structural front view of a blower body according to the present invention;

FIG. 2 is a schematic front view of the retaining ring of the present invention;

FIG. 3 is a schematic sectional elevation view of a blade according to the present invention;

FIG. 4 is a schematic side sectional view of the construction of a blisk in accordance with the present invention;

FIG. 5 is a schematic sectional view of a movable trough of the present invention in elevation;

FIG. 6 is a schematic sectional side view of the structure of the outer barrel of the present invention;

FIG. 7 is a schematic sectional view of the receiving groove of the present invention;

FIG. 8 is a schematic structural side view of an adjusting plate according to the present invention.

In the figure: 1. a fan body; 11. a base; 12. a support; 13. an electric motor; 14. a housing; 2. an impeller body; 21. a leaf disc; 22. a first mounting groove; 23. a second mounting groove; 24. a third mounting groove; 25. a first bolt; 26. a blade; 27. a fixing ring; 28. a second bolt; 3. a protective structure; 31. an outer cylinder; 32. a fixing rod; 33. a movable groove; 34. a fixed seat; 35. a protective shell; 36. a receiving groove; 37. a chute; 38. a third bolt; 39. a connecting plate; 4. an adjustment structure; 41. a rotary drum; 42. a hand wheel; 43. a gear; 44. a toothed ring; 45. a fixed shaft; 46. a connecting rod; 47. an adjusting plate; 48. a transition plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-8, an embodiment of the present invention: a high-efficiency energy-saving fan for medium-flow and medium-high pressure material conveying comprises a fan body 1, wherein the fan body 1 comprises a base 11, a support 12 is fixedly arranged on the top surface of the base 11, a motor 13 is fixedly arranged on the top surface of the support 12, a casing 14 is fixedly connected to the front side of the support 12, an impeller body 2 is movably arranged in the fan body 1, the impeller body 2 comprises a blade disc 21, the front end of the motor 13 is fixedly connected with the blade disc 21, the front surface wall of the blade disc 21 is provided with a first installation groove 22, the left side of the first installation groove 22 is provided with a second installation groove 23, the lower side of the second installation groove 23 is provided with a third installation groove 24, the back surface of the blade disc 21 is movably provided with a first bolt 25, the front surface of the blade disc 21 is fixedly provided with a blade 26, the front end of the blade 26 is fixedly provided with a fixing ring 27, and the front surface wall of the fixing ring 27 is movably provided with a second bolt 28, install protective structure 3 on impeller body 2, protective structure 3 includes urceolus 31, the positive middle part movable mounting of bladed disk 21 has urceolus 31, the fixed welding in side of urceolus 31 has dead lever 32, movable groove 33 has been seted up to dead lever 32's inside, the top fixedly connected with fixing base 34 of dead lever 32, the inside movable mounting of fixing base 34 has protecting crust 35, seted up on protecting crust 35's the inside wall and accomodate groove 36, seted up spout 37 on the back lateral wall of accomodating groove 36, the top surface movable mounting of protecting crust 35 has third bolt 38, fixedly connected with connecting plate 39 on fixing base 34's the inside wall, protective structure 3's internally mounted has regulation structure 4.

Further, the adjusting structure 4 comprises a rotating cylinder 41, the inner side of the outer cylinder 31 is in threaded connection with the rotating cylinder 41, a hand wheel 42 is fixedly mounted on the front face of the rotating cylinder 41, a gear 43 is fixedly connected to the rear wall of the rotating cylinder 41, a gear ring 44 is movably mounted on the outer side of the gear 43, a fixing shaft 45 is fixedly welded on the outer wall of the gear ring 44, a connecting rod 46 is movably mounted on the inner side of the fixing shaft 45, an adjusting plate 47 is movably mounted inside the accommodating groove 36, a transition plate 48 is movably mounted on the left side of the adjusting plate 47, the transition plate 48 is turned out from the inside of the accommodating groove 36, the inner side wall of the protective shell 35 is bent, the interval between the tail ends of two adjacent protective shells 35 is reduced, wind power loss is reduced, the maximum value in the middle of an H-Q curve is avoided, stable operation of the fan body 1 is ensured, and noise is reduced.

Further, the blade 26 is located the edge of the front of the blade disc 21, the circular ring-shaped groove is formed in the middle of the front of the blade disc 21, the outer cylinder 31 is installed inside the groove, the first installation groove 22 is communicated with the third installation groove 24, the second installation groove 23 is communicated with the third installation groove 24 and the groove, a position is provided for installation of the outer cylinder 31, and the stability of installation between the outer cylinder 31 and the fixing rod 32 is guaranteed.

Furthermore, the front end of the first bolt 25 is in threaded connection with the rear side wall of the outer cylinder 31, the vane 26 is of an arc-shaped structure, the vane 26 is circumferentially arranged at the edge of the front face of the vane disc 21, the fixing ring 27 is of an annular structure, and the vane 26 and the fixing ring 27 are fixedly connected through the second bolt 28, so that the outer cylinder 31 can be fixedly installed on the bracket 12, the front end of the vane 26 is fixed, and the stability of connection between the vane 26 and the fixing ring 27 is ensured.

Further, the outer cylinder 31 is of a cylindrical structure, the outer cylinder 31 is sleeved at the front end of the motor 13, a through groove is formed in the side wall of the outer cylinder 31, a thread groove is formed in the inner side wall of the outer cylinder 31, a space is provided for the connecting rod 46 to penetrate through the outer cylinder 31, the connecting rod 46 can move in the through groove, the outer cylinder 31 and the rotating cylinder 41 can be conveniently meshed, and the control gear 43 rotates.

Further, the inside at second mounting groove 23 is installed to dead lever 32, and the front of dead lever 32 and the front parallel and level of bladed disk 21, fixing base 34 are installed in the inside of first mounting groove 22, and fixing base 34's the front and the front parallel and level of bladed disk 21, and fixing base 34 is the arc structure, guarantees bladed disk 21 surfacing, reduces the resistance to the material is carried, improves the rotatory stability of bladed disk 21.

Further, the inboard at fixing base 34 is installed to protective housing 35, and the inboard at protective housing 35 is installed to blade 26, and protective housing 35 passes through third bolt 38 fixed connection with accommodating groove 36, and connecting plate 39 is installed inside third mounting groove 24, and connecting plate 39's the front and the positive parallel and level of bladed disk 21 provide the space for protective housing 35's installation, protect blade 26's surface, effectively improve blade 26's intensity, prolong blade 26's life.

Further, the rotary cylinder 41 is a cylindrical structure, the rotary cylinder 41 is located outside the front end of the motor 13, the gear 43 is an annular structure, the gear 43 is engaged with the toothed ring 44, the connecting rod 46 penetrates through the side wall of the outer cylinder 31 via the through groove, and the connecting rod 46 is movably connected with the outer cylinder 31, so that the rotation of the gear 43 can drive the angular deflection of the toothed ring 44, the accommodating groove 36 is angularly deflected inside the movable groove 33, and the movement of the adjusting plate 47 is conveniently controlled.

Further, the middle section of the connecting rod 46 is located on the inner side of the movable groove 33, fixing columns are arranged on the back of the adjusting plate 47 and located on the inner side of the sliding groove 37, the top end of the connecting rod 46 is movably connected with the fixing columns on the back of the adjusting plate 47, the connecting rod 46 can rotate inside the movable groove 33, a space is provided for movement of the connecting rod 46, the connecting rod 46 can drive the adjusting plate 47 to deflect in an angle through the fixing columns, the top end of the adjusting plate 47 is exposed from the inside of the accommodating groove 36, and meanwhile the adjusting plate 47 can push the transition plate 48 to turn out from the inside of the accommodating groove 36.

Furthermore, the bottom end of the transition plate 48 is located at the bottom end of the accommodating groove 36, the bottom end of the adjusting plate 47 is located in the middle of the back of the transition plate 48, the top end of the transition plate 48 is located in the middle of the adjusting plate 47, the adjusting plate 47 and the transition plate 48 are both of arc-shaped structures, the adjusting plate 47 is exposed from the inside of the accommodating groove 36, the transition plate 48 can be driven to turn out from the inside of the accommodating groove 36, a transition area is provided between the inner side wall of the protective shell 35 and the bending radian of the adjusting plate 47, and wind power loss and noise are further reduced.

The working principle is as follows: during the use, protective housing 35 can be to the surface omnidirectional protection of blade 26, effectively improve the intensity of blade 26, the life of extension blade 26, when protective housing 35 needs to be changed, second bolt 28 can be rotated down, and solid fixed ring 27 is taken off, make the front end of blade 26 remove fixedly, after that, third bolt 38 is rotated down, make blade 26 and protective housing 35 remove fixedly, then take out protective housing 35 from blade 26, and establish new protective housing 35 cover at blade 26, after that can realize the convenient change to protective housing 35 with second bolt 28 soon again, and need not whole changes, thereby save cost of maintenance, productivity gain.

Meanwhile, when the wind power generation device is used, the hand wheel 42 can be rotated, the hand wheel 42 can drive the rotating cylinder 41 to rotate, meanwhile, the gear 43 can be driven to rotate by the rotation of the rotating cylinder 41, the angle of the connecting rod 46 inside the movable groove 33 is deflected, then the connecting rod 46 can drive the adjusting plate 47 to deflect through the fixing column, the top end of the adjusting plate 47 is exposed from the inside of the accommodating groove 36, meanwhile, the adjusting plate 47 can push the transition plate 48 to turn out from the inside of the accommodating groove 36, a transition area is provided between the inner side wall of the protecting shell 35 and the bending radian of the adjusting plate 47, wind resistance is reduced, the inner side wall of the protecting shell 35 is bent, the interval between the tail ends of the two adjacent groups of protecting shells 35 is reduced, wind power loss is reduced, the maximum value in the middle of an H-Q curve is avoided, stable operation of the fan body 1 is guaranteed, and noise is reduced.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (10)

1. The utility model provides a be used for well flow, well high-efficient energy-conserving fan of high-pressure material transport, includes fan body (1), its characterized in that: the fan body (1) comprises a base (11), a support (12) is fixedly mounted on the top surface of the base (11), a motor (13) is fixedly mounted on the top surface of the support (12), a casing (14) is fixedly connected to the front side of the support (12), an impeller body (2) is movably mounted inside the fan body (1), the impeller body (2) comprises a blade disc (21), a blade disc (21) is fixedly connected to the front end of the motor (13), a first mounting groove (22) is formed in the front wall of the blade disc (21), a second mounting groove (23) is formed in the left side of the first mounting groove (22), a third mounting groove (24) is formed in the lower side of the second mounting groove (23), a first bolt (25) is movably mounted on the back side of the blade disc (21), and blades (26) are fixedly mounted on the front side of the blade disc (21), the front end fixed mounting of blade (26) has solid fixed ring (27), movable mounting has second bolt (28) on the front wall of solid fixed ring (27), install protective structure (3) on impeller body (2), protective structure (3) include urceolus (31), the positive middle part movable mounting of leaf disc (21) has urceolus (31), the fixed welding in side of urceolus (31) has dead lever (32), movable groove (33) have been seted up to the inside of dead lever (32), the top fixedly connected with fixing base (34) of dead lever (32), the inside movable mounting of fixing base (34) has protecting crust (35), set up on the inside wall of protecting crust (35) and accomodate groove (36), seted up spout (37) on the back lateral wall of accomodating groove (36), the top surface movable mounting of protecting crust (35) has third bolt (38), fixedly connected with connecting plate (39) on the inside wall of fixing base (34), the internally mounted of protective structure (3) has regulation structure (4).

2. The high-efficiency energy-saving fan for medium-flow and medium-high pressure material conveying is characterized in that: adjust structure (4) including a rotatory section of thick bamboo (41), the inboard threaded connection of urceolus (31) has a rotatory section of thick bamboo (41), the positive fixed mounting of a rotatory section of thick bamboo (41) has hand wheel (42), the back wall fixedly connected with gear (43) of a rotatory section of thick bamboo (41), the outside movable mounting of gear (43) has ring gear (44), the fixed welding of outer wall of ring gear (44) has fixed axle (45), the inboard movable mounting of fixed axle (45) has connecting rod (46), the inside movable mounting who accomodates groove (36) has regulating plate (47), the left side movable mounting of regulating plate (47) has cab apron (48).

3. The high-efficiency energy-saving fan for medium-flow and medium-high pressure material conveying is characterized in that: the blade (26) is located the positive edge of bladed disk (21), the annular recess of circle is seted up at the positive middle part of bladed disk (21), the inside at the recess is installed in urceolus (31), first mounting groove (22) communicate with each other with third mounting groove (24), second mounting groove (23) communicate with each other with third mounting groove (24) and recess.

4. The high-efficiency energy-saving fan for medium-flow and medium-high pressure material conveying is characterized in that: the front end of first bolt (25) and the back lateral wall threaded connection of urceolus (31), blade (26) are the arc structure, blade (26) are the circumference dress and distribute at the positive edge of bladed disk (21), solid fixed ring (27) are the annular structure, blade (26) and solid fixed ring (27) are through second bolt (28) fixed connection.

5. The high-efficiency energy-saving fan for medium-flow and medium-high pressure material conveying is characterized in that: the outer cylinder (31) is of a cylindrical structure, the outer cylinder (31) is sleeved at the front end of the motor (13), a through groove is formed in the side wall of the outer cylinder (31), and a thread groove is formed in the inner side wall of the outer cylinder (31).

6. The high-efficiency energy-saving fan for medium-flow and medium-high pressure material conveying is characterized in that: the inside at second mounting groove (23) is installed in dead lever (32), the front of dead lever (32) and the front parallel and level of bladed disk (21), the inside at first mounting groove (22) is installed in fixing base (34), the front of fixing base (34) and the front parallel and level of bladed disk (21), fixing base (34) are the arc structure.

7. The high-efficiency energy-saving fan for medium-flow and medium-high pressure material conveying is characterized in that: the inboard at fixing base (34) is installed in protecting crust (35), the inboard at protecting crust (35) is installed in blade (26), protecting crust (35) with accomodate groove (36) and pass through third bolt (38) fixed connection, inside third mounting groove (24) is installed in connecting plate (39), the front and the positive parallel and level of bladed disk (21) of connecting plate (39).

8. The high-efficiency energy-saving fan for medium-flow and medium-high pressure material conveying is characterized in that: the rotary drum (41) is of a cylindrical structure, the rotary drum (41) is located on the outer side of the front end of the motor (13), the gear (43) is of an annular structure, the gear (43) is meshed with the gear ring (44), the connecting rod (46) penetrates through the side wall of the outer drum (31) through a through groove, and the connecting rod (46) is movably connected with the outer drum (31).

9. The high-efficiency energy-saving fan for medium-flow and medium-high pressure material conveying is characterized in that: the middle section of connecting rod (46) is located the inboard of activity groove (33), the back of regulating plate (47) is provided with the fixed column, and the fixed column is located the inboard of spout (37), the top of connecting rod (46) and the fixed column swing joint at the regulating plate (47) back.

10. The high-efficiency energy-saving fan for medium-flow and medium-high pressure material conveying is characterized in that: the bottom of crossing cab apron (48) is located the bottom of accomodating groove (36), the bottom of regulating plate (47) is located the middle part at the cab apron (48) back, the top of crossing cab apron (48) is located the middle part of regulating plate (47), regulating plate (47) and transition plate (48) all are the arc structure.

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