CN115163574B - Anti-scaling induced draft fan - Google Patents
Anti-scaling induced draft fan Download PDFInfo
- Publication number
- CN115163574B CN115163574B CN202210912967.1A CN202210912967A CN115163574B CN 115163574 B CN115163574 B CN 115163574B CN 202210912967 A CN202210912967 A CN 202210912967A CN 115163574 B CN115163574 B CN 115163574B
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- China
- Prior art keywords
- air
- air supply
- pipe
- impeller
- fan
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- 239000000428 dust Substances 0.000 claims abstract description 37
- 239000007921 spray Substances 0.000 claims abstract description 24
- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 238000007664 blowing Methods 0.000 claims abstract description 11
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000003373 anti-fouling effect Effects 0.000 claims 1
- 238000005245 sintering Methods 0.000 abstract description 10
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 8
- 239000003546 flue gas Substances 0.000 abstract description 8
- 238000010926 purge Methods 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 241000886569 Cyprogenia stegaria Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
- B08B5/023—Cleaning travelling work
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides an anti-scaling induced draft fan, which comprises a fan main body, wherein a rotor impeller, an air inlet and an air outlet are arranged in the fan main body; an air outlet of the fan main body is provided with an air guiding pipe, the tail end of the air guiding pipe is connected with a dust remover, the outlet end of the dust remover is connected with an air supplying pipe, the air supplying pipe stretches into the vicinity of the non-working surface of the impeller at the air inlet end, and a spray head pointing to the non-working surface of the impeller is arranged at the tail end of the air supplying pipe; the air guiding pipe and the air supplying pipe are respectively provided with an independently controlled valve; and a direction changing mechanism for fine adjusting the blowing direction of the spray head is further arranged between the air supply pipe and the spray head. The invention leads out a high-pressure flue gas from the outlet of the sintering denitration induced draft fan, and returns to the air inlet end of the induced draft fan to purge the non-working surface of the rotor impeller after dust removal by the dust remover, so that the soft deposited dust adhered to the impeller is purged in time, the deposited dust is prevented from scaling, thereby ensuring the balanced rotation of the fan impeller and reducing the occurrence of vibration phenomenon.
Description
Technical Field
The invention relates to the technical field of induced fans, in particular to an anti-scaling induced fan.
Background
The induced draft fan is the most commonly used gas medium conveying device in factories; in iron and steel enterprises, a sintering induced draft fan plays a very important role in the sintering process, and in the sintering process, due to the continuous rotation of an induced draft fan impeller, the flue gas of an air inlet continuously flows to an exhaust port through a runner among blades, so that the sintering process is carried out. The running state of the induced draft fan not only directly influences the sintering yield, quality and cost, but also influences the stability of iron-making production and the exertion of blast furnace productivity. However, in the operation process of the induced draft fan, phenomena such as high vibration and easy damage of a bearing generally exist, so that the air quantity and the pressure of the flue gas are influenced, frequent shutdown is required for cleaning, and the normal production of sintering is severely restricted.
The reason for the high vibration of the induced draft fan is caused by unbalanced rotation of the impeller of the draft fan, and the unbalance of the impeller is mostly related to poor effect of the dust removing device connected in front of the induced draft fan. Although the sintering machine head of the company is provided with the dry electrostatic dust removal device, the flue gas is subjected to wet desulfurization, whitening and other devices before entering the denitration device, so that the flue gas entering the denitration induced draft fan of the sintering system contains not only dust which is not removed by the electric dust remover but also larger moisture, the dust and the moisture can be gradually deposited on a relatively static impeller non-working surface to form a dust scale layer after entering the impeller, and the dust scale layer of the impeller non-working surface can reach about 30mm when the dust scale layer is thickest; when the ash scale layer falls off independently, the dynamic balance of the impeller is destroyed, so that vibration occurs, the double-amplitude vibration value of the bearing reaches 0.3 mm-0.4 mm, and the maximum vibration value reaches 0.6 mm-0.8 mm (the normal value is below 0.08 mm), and if the double-amplitude vibration value is not handled in time, a galloping accident can be caused. In order to avoid the occurrence of the situation, the induced draft fan has to be frequently shut down for manual ash removal in factories, and ash removal is carried out 2-3 times per month when serious, so that serious loss is caused economically, hidden danger is caused safely, and meanwhile, the maintenance workload of operators is greatly increased.
At present, the methods for solving the impeller scaling mainly comprise the following two methods:
1. water spraying and descaling: the water spraying system is arranged on a shell of the induced draft fan, and the surface of the non-working surface of the impeller is washed by high-pressure ash flushing water, so that the descaling can be finished; however, the method is carried out in a shutdown state, the descaling efficiency is low, long shutdown descaling time is required, the descaling interval is short, frequent shutdown descaling is required, and the normal operation of the induced draft fan is seriously influenced;
2. descaling by high-pressure gas: the system adopts a purging structure similar to a water spraying system, and adopts a high-pressure air source to purge the non-working surface of the impeller; the method can remove the scale in the clearance of normal shutdown of the induced draft fan, does not need to be stopped deliberately, is convenient, but needs to be equipped with a high-pressure air source conveying system, and has high energy consumption.
Therefore, how to solve the scaling of the impeller of the induced draft fan without stopping the machine becomes a problem to be improved.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide an anti-scaling induced draft fan capable of carrying out ash removal on line.
In order to solve the technical problems, the invention adopts the following technical scheme:
an anti-scaling induced draft fan comprises a fan main body, wherein a rotor impeller, an air inlet and an air outlet are arranged in the fan main body; an air outlet of the fan main body is provided with an air guiding pipe, the tail end of the air guiding pipe is connected with a dust remover, the outlet end of the dust remover is connected with an air supplying pipe, the air supplying pipe stretches into the vicinity of the non-working surface of the impeller at the air inlet end, and a spray head pointing to the non-working surface of the impeller is arranged at the tail end of the air supplying pipe; the air guiding pipe and the air supplying pipe are respectively provided with an independently controlled valve; and a direction changing mechanism for fine adjusting the blowing direction of the spray head is further arranged between the air supply pipe and the spray head.
The invention further improves that: and a plurality of air nozzles are formed in the spray head and face the direction of the non-working surface of the impeller.
The invention further improves that: the air jet is an inverted cone mouth with a gradually reduced caliber.
The invention further improves that: the direction changing mechanism comprises a fixed cylinder, an air supply hard pipe and an air supply hose, wherein one end of the fixed cylinder is opened, and one end of the opening of the fixed cylinder points to the non-working surface of the fan impeller; the center of the fixed cylinder is fixedly connected with an air supply hard pipe, the front end of the air supply hard pipe is fixedly connected with an air supply hose, and the end part of the air supply hose is connected with a spray head; the side wall of the fixed cylinder is also provided with an air cavity for communicating the air supply pipe with the air supply hard pipe.
The invention further improves that: the outer part of the air supply hard pipe is sleeved with an impeller, the outer part of the air supply hose is provided with a fluted disc, the inner wall of the fixed cylinder corresponding to the fluted disc is provided with a rack meshed with the fluted disc, and the fluted disc is provided with a through hole for the air supply hose to pass through; the fluted disc is connected with the fan blade wheel through a connecting rod in a transmission way.
The invention further improves that: ball bearings are arranged between the fan blade wheels and the outer wall of the air supply hard tube.
The invention further improves that: the outer wall of the fixed cylinder is also provided with an air inlet gap pointing to the fan impeller, the air inlet gap is communicated with the air supply pipe through an air supply branch pipe, and the fixed cylinder wall at the opposite side of the air inlet gap is also provided with an air outlet gap.
The invention further improves that: the through hole on the fluted disc is an elliptic through hole, and the short diameter of the elliptic through hole is in clearance fit with the outer diameter of the air supply hose.
The invention further improves that: one end of the short diameter of the elliptical through hole is provided with a guide roller
The invention further improves that: the other end of the short diameter of the elliptical through hole opposite to the guide roller is provided with an inclined surface with gradually enlarged aperture along the air flow direction.
By adopting the technical scheme, the invention has the following technical progress:
the invention provides an anti-scaling draught fan, which is characterized in that a high-pressure smoke gas led out of an outlet of the draught fan is returned to an air inlet end of the draught fan to purge a non-working surface of a rotor impeller after dust is removed by a dust remover, so that soft deposited dust adhered to the impeller is purged in time, the deposited dust is prevented from scaling, the balanced rotation of the impeller of the draught fan is ensured, and the occurrence of vibration phenomenon is reduced. After the induced draft fan is actually operated as a sintering system denitration induced draft fan, the ash accumulation phenomenon is basically eliminated, and the ash removal effect is obvious; in the operation period of one year, the impeller vibration phenomenon is basically eliminated, and the accident of damaging the large vibration bearing caused by dust accumulation does not occur. According to measurement, the vibration value of the induced draft fan after one year of operation still remains in the normal range of 0.02 mm-0.04 mm, and after shutdown inspection, the induced draft fan impeller is found to have scattered thin sticky ash with the thickness less than 1mm, and the ash removal effect is obvious.
Because the impeller of the fan is mostly shaped, dead angles are extremely easy to generate when a common spray head is subjected to unidirectional blowing, and dead angle scale deposition still causes vibration of the fan, the direction changing mechanism is introduced between the air supply pipe and the spray head, so that the continuous change and fine adjustment of the blowing angle of the spray head can be realized, the blowing range covers the whole impeller, and the dead angles are effectively avoided.
The direction changing mechanism adopts high-pressure purified gas as a power source, and the fan impeller drives the fluted disc to rotate, so that the air supply hose deforms and inclines under the extrusion of the guide roller, and the spray head is driven to displace; the direction-changing process does not introduce other power mechanisms, is simple and efficient, clean and environment-friendly. The invention sets several guide rollers in the fluted disc through hole, when the air supply hose contacts the guide roller, it is pushed by the guide roller to move, avoiding hard friction on the hose wall, improving the service life of the air supply hose and the normal operation time of the induced draft fan; meanwhile, the through holes corresponding to the guide rollers are arranged to be inclined, so that the support and the limit are carried out when the air supply hose is inclined, and the air supply bent pipe is prevented from being excessively bent.
The invention adopts the high-pressure flue gas generated by the induced draft fan as a gas source, and further pressurizes the high-pressure gas through the shape of the air jet in the spray head, so that the effective purging of the non-working surface of the impeller can be realized, the pressurizing operation is not needed, other power sources are not needed to be introduced, the process is clean and environment-friendly, the improvement of the original induced draft fan is convenient, and the invention is suitable for large-scale popularization.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic top view of the present invention;
FIG. 3 is a schematic cross-sectional view of the steering mechanism;
FIG. 4 is a schematic diagram of a spray head;
FIG. 5 is a schematic top view of a toothed disc;
FIG. 6 is a schematic cross-sectional view of a toothed disc;
in the figure, 1, a fan main body, 2, a motor, 3, a foundation, 4, a main body support, 5, a coupling, 6, a motor support, 7, an induced air pipe, 8, a dust remover, 9, an air supply pipe, 10, a spray head, 11, an air nozzle, 12, a steering mechanism, 12-1, a fixed cylinder, 12-2, an air supply hard pipe, 12-3, an air supply hose, 12-4, a fan blade wheel, 12-5, a fluted disc, 12-5-1, an elliptical through hole, 12-5-2, a guide roller, 12-6, a rack, 12-7, a connecting rod, 12-8, an air cavity, 12-9, an air inlet gap, 12-10, an air outlet gap, 13, a connecting support, 14, a valve, 15 and an air supply branch pipe.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
An anti-scaling induced draft fan is shown in fig. 1-6, and comprises a fan main body 1 and a motor 2, wherein the front end and the rear end of the fan main body 1 are fixed on a foundation 3 through a main body bracket 4, and an air inlet, an air outlet and a rotor impeller are arranged in the fan main body 1; the motor 2 is arranged on a motor base through a motor bracket 6, the motor base is fixed on the foundation 3, a power output shaft of the motor is in transmission connection with an impeller main shaft of the fan main body 1 through a coupler 5, the motor drives a rotor impeller of the fan main body 1 to rotate, air is introduced from an air inlet and is discharged from an air outlet, and continuous induced draft is achieved.
The air outlet of the fan main body 1 is provided with an air guiding pipe 7, the tail end of the air guiding pipe 7 is connected with the inlet end of a dust remover 8, the outlet end of the dust remover 8 is connected with an air supplying pipe 9, the air supplying pipe 9 stretches into the impeller non-working surface of the air inlet end, the tail end of the air supplying pipe 9 is provided with a spray head 10 pointing to the impeller non-working surface, and the length of the spray head 10 is not less than 1/2 of the length of the impeller. The spray head 10 is provided with a plurality of air jet ports 11, and the air jet ports 11 face the direction of the non-working surface of the impeller. The smoke gas with a certain pressure head at the air outlet of the induced draft fan is led out by an induced draft pipe 7, purified by a dust remover 8 and returned to the air inlet end of the fan main body 1, and high-speed purified gas is sprayed onto the non-working surface of the fan impeller after being pressurized by a nozzle to form a flow field of a vortex area, so that soft accumulated dust which is just adhered to the impeller is blown off, the soft accumulated dust is prevented from being thickened continuously, and the accumulated dust of the fan impeller is prevented from scaling.
The dust remover 8 is preferably a cyclone dust remover, and the inlet end of the cyclone dust remover is a spiral volute inlet end, and flue gas spirally descends in the cyclone dust remover so as to fully separate dust and gas.
As shown in FIG. 4, the nozzle 10 is provided with a plurality of nozzles 11 in parallel at the outlet end of the nozzle 10, the nozzles 11 are reverse conical openings with gradually reduced diameters, so that the pressurization of air flow can be effectively realized, and the soot blowing effect of the non-working surface of the blade surface is increased. The gas nozzles 11 may be one or more rows, and preferably a plurality of rows; in the case of multiple rows of gas nozzles 11, the gas nozzles 11 of adjacent rows are staggered.
The air induction pipe 7 and the air supply pipe 9 are respectively provided with an independently controllable valve 14.
A direction changing mechanism 12 is further arranged between the air supply pipe 9 and the spray head 10, and the direction changing mechanism 12 is fixed on the main body support 4 through a connecting support 13 so as to realize fine adjustment of the high-speed net gas spraying direction and ensure that the non-working surface of the special-shaped impeller is fully blown. The direction changing mechanism 12 comprises a fixed cylinder 12-1, an air supply hard pipe 12-2, an air supply hose 12-3, a fan impeller 12-4 and a fluted disc 12-5, wherein one end of the fixed cylinder 12-1 is opened, and one end of the opening of the fixed cylinder is directed to a non-working surface of the fan impeller. An air supply hard pipe 12-2 is fixedly arranged in the center of the fixed cylinder 12-1, the front end of the air supply hard pipe 12-2 is fixedly connected with an air supply hose 12-3, and the end part of the air supply hose 12-3 is connected with a spray head 10. The side wall of the fixed cylinder 12-1 is provided with an air cavity 12-8 which is communicated with the air supply pipe 9 and the air supply hard pipe 12-2.
The outside of the air supply hard tube 12-2 is sleeved with an impeller 12-4, a ball bearing is arranged between the impeller 12-4 and the outer wall of the air supply hard tube 12-2, and the impeller 12-4 can freely rotate along the air supply hard tube 12-2. The outer wall of the fixed cylinder 12-1 is also provided with an air inlet gap 12-9 pointing to the fan wheel 12-4, the air inlet gap 12-9 is communicated with the air supply pipe 9 through an air supply branch pipe 15, the wall of the fixed cylinder 12-1 at the opposite side to the air inlet gap 12-9 is also provided with an air outlet gap 12-10, and one of the high-speed clean air flows to the fan wheel 12-4 through the air supply branch pipe 15 and the air inlet gap 12-9 in sequence and drives the fan wheel 12-4 to rotate, and then flows out from the air outlet gap 12-10. The air supply branch pipe 15 is provided with an independently controlled valve 14.
The outside of the air supply hose 12-3 is provided with a fluted disc 12-5, the inner wall of the fixed barrel 12-1 corresponding to the fluted disc 12-5 is provided with a rack 12-6 meshed with the fluted disc 12-5, and the fluted disc 12-5 can rotate along the rack 12-6. The fluted disc 12-5 is in transmission connection with the fan blade wheel 12-4 through a connecting rod 12-7, and when the fan blade wheel 12-4 rotates, the fluted disc 12-5 is driven to synchronously rotate.
The center of the fluted disc 12-5 is provided with a through hole for the air supply hose 12-3 to pass through, the through hole is preferably an elliptic through hole 12-5-1, and the short diameter of the elliptic through hole 12-5-1 is in clearance fit with the outer diameter of the air supply hose 12-3. One end of the short diameter of the elliptical through hole 12-5-1 is provided with a guide roller 12-5-2, and the wheel axle of the guide roller 12-5-2 penetrates through the upper end face and the lower end face of the fluted disc 12-5 and is locked; the wheel surface of the guide roller 12-5-2 presses the air supply hose 12-3. The other end of the elliptical through hole 12-5-1 opposite to the guide roller 12-5-2 is provided with an inclined plane (see fig. 6) with gradually enlarged aperture along the air flow direction, when the guide roller 12-5-2 extrudes the air supply hose 12-3, the air supply hose 12-3 is deformed and is forced to incline to the opposite side, so that the nozzle 10 is driven to incline in angle, and the blowing direction of the air nozzle is changed. When the air supply hose 12-3 is inclined, the inclined surface side wall of the elliptical through hole 12-5-1 can support the pipe body of the air supply hose 12-3, so that bending dead angles are avoided being excessively formed, and normal air supply of the air supply hose 12-3 is ensured; meanwhile, as the through holes are elliptical through holes, the two sides of the air supply hose 12-3 are stressed, the rest parts are not stressed, the deformation range is large, the stability is higher, and the angle change range of the spray head 10 is larger.
The guide rollers 12-5-2 may be provided in one or more, two guide rollers 12-5-2 shown in fig. 5, according to the type of the apparatus and the pipe diameter of the air supply hose 12-3. However, when the number of the guide rollers 12-5-2 is plural, the front end surfaces of the guide rollers 12-5-2 are distributed in an arc shape, so that the stress weak points of the air supply hose 12-3 are reduced, bending is avoided, and the long-term operation time is prolonged.
Generally, the air supply hose 12-3 needs to penetrate through the casing of the air inlet end of the induced draft fan to make the nozzle 10 approach to the impeller non-working surface; because in the draught fans of different specifications, the gap between the shell and the impeller is different in size, the direction changing mechanism 12 can be arranged in the shell or outside the shell according to the actual conditions of the equipment, when the direction changing mechanism 12 is arranged outside the shell, the aperture of a through hole of the draught fan shell for the air supply hose 12-3 to pass through is relatively larger, the swing of the air supply hose 12-3 is prevented from being limited by the through hole of the shell, and the full change of the blowing angle of the nozzle 10 is ensured.
The working process of the invention is as follows:
when the induced draft fan operates, a stream of flue gas with certain pressure is led out from an air outlet of the induced draft fan and sent into a dust remover for purification and dust removal; the high-speed clean air is returned to the air inlet end of the fan main body through the air supply pipe, is further pressurized through the spray head and then is sprayed onto the non-working surface of the rotor impeller, so that the soft accumulated ash adhered to the impeller is timely blown off, accumulated ash scaling is prevented, and online ash removal is realized.
In the ash removal process, high-speed clean air blows the wind wheel to rotate through the air inlet gap, so that the fluted disc is driven to rotate. When the air supply hose rotates, the guide roller extrudes the air supply hose, so that the air supply hose inclines to the opposite side, and the blowing direction of the nozzle is changed; with the continuous rotation of the fluted disc, the air supply hose drives the nozzle to incline along the circumferential direction, and thorough ash removal of the non-working surface of the special-shaped impeller is realized through continuous adjustment of the blowing direction.
The foregoing description is only of the preferred embodiments of the invention, and all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (4)
1. An anti-scaling induced draft fan which is characterized in that: the air conditioner comprises a fan main body (1), wherein a rotor impeller, an air inlet and an air outlet are arranged in the fan main body (1); an air guiding pipe (7) is connected to the air outlet of the fan main body (1), the tail end of the air guiding pipe (7) is connected with a dust remover (8), the outlet end of the dust remover (8) is connected with an air supplying pipe (9), the air supplying pipe (9) extends to the vicinity of the non-working surface of the impeller at the air inlet end, and a spray head (10) pointing to the non-working surface of the impeller is arranged at the tail end of the air supplying pipe (9); the air guide pipe (7) and the air supply pipe (9) are respectively provided with an independently controlled valve (14); a direction changing mechanism (12) for finely adjusting the blowing direction of the nozzle (10) is further arranged between the air supply pipe (9) and the nozzle (10);
the direction changing mechanism (12) comprises a fixed cylinder (12-1), an air supply hard pipe (12-2) and an air supply hose (12-3), wherein one end of the fixed cylinder (12-1) is opened, and one end of the opening of the fixed cylinder is pointed to one side of the impeller non-working surface; an air supply hard pipe (12-2) is fixedly connected to the center of the fixed cylinder (12-1), an air supply hose (12-3) is fixedly connected to the front end of the air supply hard pipe (12-2), and a nozzle (10) is connected to the end part of the air supply hose (12-3); the side wall of the fixed cylinder (12-1) is also provided with an air cavity (12-8) for communicating the air supply pipe (9) with the air supply hard pipe (12-2);
the external part of the air supply hard pipe (12-2) is sleeved with an impeller (12-4), the external part of the air supply hose (12-3) is provided with a fluted disc (12-5), the inner wall of the fixed cylinder (12-1) corresponding to the fluted disc (12-5) is provided with a rack (12-6) meshed with the fluted disc (12-5), and the fluted disc (12-5) is provided with a through hole for the air supply hose (12-3) to pass through; the fluted disc (12-5) is in transmission connection with the fan blade wheel (12-4) through a connecting rod (12-7);
an air inlet gap (12-9) pointing to the fan impeller (12-4) is further formed in the outer wall of the fixed barrel (12-1), the air inlet gap (12-9) is communicated with the air supply pipe (9) through an air supply branch pipe (15), and an air outlet gap (12-10) is further formed in the wall of the fixed barrel (12-1) on the side opposite to the air inlet gap (12-9);
the through hole on the fluted disc (12-5) is an elliptical through hole (12-5-1), and the short diameter of the elliptical through hole (12-5-1) is in clearance fit with the outer diameter of the air supply hose (12-3);
one end of the minor diameter of the elliptical through hole (12-5-1) is provided with a guide roller (12-5-2).
2. The anti-scaling induced draft fan according to claim 1 wherein: the spray head (10) is provided with a plurality of air nozzles (11), and the air nozzles (11) face the direction of the impeller non-working surface.
3. An anti-fouling induced draft fan according to claim 2 wherein: the air jet (11) is an inverted cone mouth with a gradually reduced caliber.
4. The anti-scaling induced draft fan according to claim 1 wherein: a bearing is arranged between the fan blade wheel (12-4) and the outer wall of the air supply hard tube (12-2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210912967.1A CN115163574B (en) | 2022-07-31 | 2022-07-31 | Anti-scaling induced draft fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210912967.1A CN115163574B (en) | 2022-07-31 | 2022-07-31 | Anti-scaling induced draft fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115163574A CN115163574A (en) | 2022-10-11 |
| CN115163574B true CN115163574B (en) | 2024-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210912967.1A Active CN115163574B (en) | 2022-07-31 | 2022-07-31 | Anti-scaling induced draft fan |
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| Country | Link |
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| CN (1) | CN115163574B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001234896A (en) * | 2000-02-25 | 2001-08-31 | Hitachi Ltd | Inlet casing structure for pneumatic machine |
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| CN114337526A (en) * | 2021-11-19 | 2022-04-12 | 克拉玛依天华新能源电力有限公司 | Photovoltaic panel accumulated snow cleaning equipment and cleaning method thereof |
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2022
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| JP2001234896A (en) * | 2000-02-25 | 2001-08-31 | Hitachi Ltd | Inlet casing structure for pneumatic machine |
| CN201025273Y (en) * | 2007-01-26 | 2008-02-20 | 武汉科技大学 | A dust cleaning device for leaf wheel of acentric wind machine |
| CN202545374U (en) * | 2012-03-02 | 2012-11-21 | 淄博科鸿风机有限公司 | Airflow blowing device |
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| CN115163574A (en) | 2022-10-11 |
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