CN117128189A

CN117128189A - Centrifugal fan casing volute tongue blowing device and blowing method

Info

Publication number: CN117128189A
Application number: CN202311200302.9A
Authority: CN
Inventors: 菅有昌; 刘春亭; 关丽喆; 赵光泽; 黄兴源; 周林英; 张宪龙
Original assignee: Xingpai Zhizao Digital Technology Shandong Co ltd
Current assignee: Xingpai Zhizao Digital Technology Shandong Co ltd
Priority date: 2023-09-18
Filing date: 2023-09-18
Publication date: 2023-11-28

Abstract

The invention belongs to the technical field of centrifugal fans, and particularly relates to a centrifugal fan casing volute tongue blowing device and a blowing method, wherein the device comprises a first casing, a second casing and an arc-shaped casing, the second casing is arranged on the outer side of the first casing, the second casing is communicated with the first casing, and the arc-shaped casing is arranged at a transition position between the second casing and the first casing; a blowing mechanism is arranged in the arc-shaped shell, a feeding mechanism is arranged at one end of the blowing mechanism, an adjusting mechanism is arranged at the other end of the blowing mechanism, and a discharging mechanism is arranged at the bottom of the shell; compared with the prior art, the invention replaces the volute tongue by the injection pipe, does not change the shape of the original shell, does not change the aerodynamic characteristics in the centrifugal fan, can realize injection on the impeller of the centrifugal fan, and does not influence the original volute tongue structure of the centrifugal fan.

Description

Centrifugal fan casing volute tongue blowing device and blowing method

Technical Field

The invention belongs to the technical field of centrifugal fans, and particularly relates to a centrifugal fan shell volute tongue blowing device and a blowing method.

Background

At present, the connection between the volute and the air outlet of the centrifugal fan is provided with a tongue-shaped structure, namely a volute tongue, which is used for preventing part of air from circulating in the volute, and when the air flow at the outlet of the blade channel of the rotating impeller passes the vicinity of the volute tongue, the tongue of the volute tongue divides the air flow into two parts: most of the air flows to the outlet of the fan along the channel, and a small part of the air flows back to the volute through the gap between the volute tongue and the impeller.

When gas enters the impeller, a certain angle exists between the gas and the working surface of the rotating blade, vortex is generated on the non-working surface of the blade by the gas according to the fluid mechanics principle, dust in the gas can be slowly deposited on the non-working surface due to the vortex effect, a part of large-block accumulated dust can be thrown out of the impeller due to the rotating effect of the impeller when the accumulated dust reaches a certain weight, but the accumulated dust of each blade cannot be completely uniform, the accumulated dust or thrown ash blocks are not necessarily synchronous in time, so that the mass distribution of the impeller is unbalanced due to the uneven accumulated dust of the blade, and the vibration of the centrifugal fan is increased.

The conventional operation is that a manhole door of a centrifugal fan shell is opened after the centrifugal fan is stopped, and an maintainer enters the shell to remove accumulated ash on an impeller, but the environment in the shell is severe, unsafe factors exist, the subsequent shutdown of the centrifugal fan can be caused, the maintenance time is too long, and the labor intensity is too high.

Disclosure of Invention

The invention provides a centrifugal fan casing volute tongue blowing device and a blowing method aiming at the problems.

In order to achieve the above purpose, the invention adopts the following technical scheme: the volute tongue blowing device of the centrifugal fan shell comprises a first shell, a second shell and an arc-shaped shell, wherein the second shell is arranged on the outer side of the first shell and communicated with the first shell, and the arc-shaped shell is arranged at a transition position between the second shell and the first shell; the novel energy-saving air conditioner is characterized in that a blowing mechanism is arranged inside the arc-shaped shell, a feeding mechanism is arranged at one end of the blowing mechanism, an adjusting mechanism is arranged at the other end of the blowing mechanism, and a discharging mechanism is arranged at the bottom of the first shell.

Preferably, the blowing mechanism comprises a blowing pipe, the blowing pipe is positioned at the inner side of the arc-shaped shell, the periphery of the blowing pipe is matched with the inner side of the arc-shaped shell, and the blowing pipe is arranged between the feeding mechanism and the adjusting mechanism; the outer side of the blowing pipe is provided with a plurality of first through holes, and a plurality of first through holes are internally provided with nozzles.

Preferably, the feeding mechanism comprises a first side plate and a connecting pipe, the first side plate is arranged on the side surfaces of the first shell, the second shell and the arc-shaped shell, a second through hole is formed in the side surface of the first side plate, and one end of the blowing pipe is positioned in the second through hole; the connecting pipe is arranged at the end part of the jetting pipe, which is close to the side plate I, and the end part of the connecting pipe is provided with a feeding piece.

Preferably, the feeding piece comprises a steel pipe and a hose, the steel pipe is arranged at the end part of the connecting pipe, a valve I is arranged on the steel pipe, the hose is arranged at the end part of the steel pipe, a pump is arranged on the hose, and the end part of the hose is externally connected with a water tank.

Preferably, the adjusting mechanism comprises a blocking piece and a side plate II, wherein the side plate II is arranged on the side surfaces of the first shell, the second shell and the arc-shaped shell, and a through hole III is formed in the side surface of the side plate II; one end of the blowing pipe, which is far away from the feeding mechanism, is positioned in the through hole III, and the blocking piece is arranged at the end part of the blowing pipe.

Preferably, a handle is mounted at the end of the blocking member; the periphery of the blocking piece is provided with threads, and the periphery of the blocking piece is matched with a nut.

Preferably, the discharging mechanism comprises a discharging pipe, a through hole IV is formed in the bottom of the first shell, the discharging pipe is located in the through hole IV, and a valve II is installed on the discharging pipe.

Preferably, the handle is butterfly-shaped.

A blowing method of a centrifugal fan shell volute tongue blowing device comprises the following steps:

step one: the blowing pipe rotates in the arc-shaped shell through the adjusting mechanism, so that the nozzle is positioned at a proper position;

step two: rapidly opening the pump and the valve I at the moment when the centrifugal fan stops, so that the nozzle sprays and blows the impeller in the centrifugal fan;

step three: after the blowing is finished, the waste water is discharged through a discharging mechanism.

Compared with the prior art, the invention has the advantages and positive effects that:

(1) The function of the existing volute tongue in the centrifugal fan is important, the volute tongue is replaced by the blowing pipe, the original shape of the shell is not changed, the aerodynamic characteristics in the centrifugal fan are not changed, the impeller of the centrifugal fan can be blown, and the original volute tongue structure of the centrifugal fan is not influenced;

(2) The nozzle can be adjusted to various angles through the handle and the blocking piece, so that dust on the impeller can be flushed clean without dead angles;

(3) The valve I and the pump are quickly opened at the moment when the centrifugal fan stops operating, and the nozzle can better blow the non-working surface on the blade by utilizing the inertia action of the impeller;

(4) The impeller is blown by utilizing the structure of the volute tongue, other parts are not required to be added, and a blowing pipe is not required to be added at other positions of the shell;

(5) Compared with steam and air, the water is used as a medium for ash removal, and has the advantages of low requirements on the structure of the nozzle, large ash removal range, good effect, small abrasion to blades and the like.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present invention, the following description of the embodiments will briefly describe the drawings that are required to be used in the description:

fig. 1 is a front view of a volute tongue blowing device of a centrifugal fan casing provided in embodiment 1;

FIG. 2 is a schematic diagram of a centrifugal fan housing volute tongue blowing device;

FIG. 3 is a schematic diagram of a centrifugal fan housing volute tongue blowing device;

FIG. 4 is a left side view of the centrifugal fan housing tongue blowing apparatus;

FIG. 5 is a right side view of the centrifugal fan housing tongue blowing apparatus;

fig. 6 is an internal schematic view of the housing of the centrifugal fan housing tongue blowing device.

Reference numerals illustrate:

1-shell I, 2-shell II, 3-arc shell, 4-blowing pipe, 5-connecting pipe, 6-steel pipe, 7-valve I, 8-hose, 9-pump, 10-blocking piece, 11-handle, 12-discharge pipe, 13-valve II, 14-side plate I, 15-side plate II, 16-nut, 17-nozzle.

Detailed Description

In order that the above objects, features and advantages of the invention will be more clearly understood, a further description of the invention will be rendered by reference to the appended drawings and examples.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as described herein, and therefore the present invention is not limited to the specific embodiments of the disclosure that follow.

Example 1

The invention is further described below with reference to fig. 1-6, and as shown in fig. 1-6, the device comprises a first shell 1, a second shell 2 and an arc-shaped shell 3, wherein the second shell 2 is arranged on the outer side of the first shell 1, the second shell 2 is communicated with the first shell 1, the arc-shaped shell 3 is arranged at a transition position between the second shell 2 and the first shell 1, a blowing mechanism is arranged inside the arc-shaped shell 3, one end of the blowing mechanism is provided with a feeding mechanism, the other end of the blowing mechanism is provided with an adjusting mechanism, the adjusting mechanism is used for enabling the blowing mechanism to rotate inside the arc-shaped shell 3, and the bottom of the first shell 1 is provided with a discharging mechanism.

As shown in fig. 1-6, the blowing mechanism comprises a blowing pipe 4, the blowing pipe 4 is located at the inner side of the arc-shaped shell 3, the periphery of the blowing pipe 4 is matched with the inner side of the arc-shaped shell 3, the blowing pipe 4 is arranged between the feeding mechanism and the adjusting mechanism, a plurality of first through holes are formed in the outer side of the blowing pipe 4, and nozzles 17 are arranged in the first through holes.

As shown in fig. 1-5, the feeding mechanism comprises a first side plate 14 and a connecting pipe 5, the first side plate 14 is arranged on the side surfaces of the first shell 1, the second shell 2 and the arc-shaped shell 3, a second through hole is formed in the side surface of the first side plate 14, one end, far away from the adjusting mechanism, of the blowing pipe 4 is located in the second through hole, the connecting pipe 5 is arranged at the end, close to the first side plate 14, of the blowing pipe 4, and a feeding piece is arranged at the end, far away from the first side plate 14, of the connecting pipe 5.

As shown in fig. 1 to 5, the feeding member comprises a steel pipe 6 and a hose 8, the steel pipe 6 is mounted at the end of the connecting pipe 5 far away from the first side plate 14, the first valve 7 is mounted on the steel pipe 6, the hose 8 is mounted at the end of the steel pipe 6 far away from the connecting pipe 5, the pump 9 is mounted on the hose 8, and the end of the hose 8 far away from the steel pipe 6 is externally connected with a water tank.

As shown in fig. 1-5, the adjusting mechanism comprises a blocking piece 10 and a second side plate 15, the second side plate 15 is arranged on the side surfaces of the first shell 1, the second shell 2 and the arc-shaped shell 3, which are far away from the first side plate 14, the side surface of the second side plate 15 is provided with a third through hole, one end of the blowing pipe 4, which is far away from the connecting pipe 5, is positioned in the third through hole, and the blocking piece 10 is arranged at the end part of the blowing pipe 4, which is close to the second side plate 15.

As shown in fig. 1 to 5, the end of the blocking member 10 away from the blowing pipe 4 is provided with a handle 11, the outer periphery of the blocking member 10 is threaded, and the outer periphery of the blocking member 10 is fitted with a nut 16.

As shown in fig. 1-6, the discharging mechanism comprises a discharging pipe 12, a through hole IV is formed in the bottom of the first shell 1, the discharging pipe 12 is positioned in the through hole IV, and a valve II 13 is arranged on the discharging pipe 12.

In the present invention, the diameters of the second and third through holes are the same as the outer diameter of the injection pipe 4, and the diameter of the fourth through hole is the same as the outer diameter of the discharge pipe 12.

In the present invention, a blocking piece is further provided on the outer periphery of the blocking member 10, and is located between the nut 16 and the second side plate 15.

In the present invention, the nozzles 17 are distributed in 1-3 rows, each row including a plurality of nozzles 17.

In the invention, the first shell 1, the second shell 2, the arc-shaped shell 3, the outer side of the blowing pipe 4, the first side plate 14 and the second side plate 15 form the existing centrifugal fan shell.

step one: the handle 11 drives the blowing pipe 4 to rotate inside the arc-shaped shell 3, so that the nozzle 17 is positioned at a proper position, and the nut 16 is screwed down, so that the blowing pipe 4 is fixed.

Step two: the pump 9 and the valve I7 are quickly opened at the moment when the centrifugal fan stops running, so that the nozzle 17 sprays the impeller;

step three: after the blowing is finished, the valve II 13 is opened, and the waste water generated after the blowing is discharged through the discharge pipe 12.

The present invention is not limited to the above-mentioned embodiments, and any equivalent embodiments which can be changed or modified by the technical content disclosed above can be applied to other fields, but any simple modification and equivalent changes to the above-mentioned embodiments according to the technical substance of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. The volute tongue blowing device of the centrifugal fan shell comprises a first shell (1) and a second shell (2) and is characterized by further comprising an arc-shaped shell (3), wherein the second shell (2) is arranged on the outer side of the first shell (1), the second shell (2) is communicated with the first shell (1), and the arc-shaped shell (3) is arranged at a transition position between the second shell (2) and the first shell (1);

the novel energy-saving air conditioner is characterized in that a blowing mechanism is arranged inside the arc-shaped shell (3), a feeding mechanism is arranged at one end of the blowing mechanism, an adjusting mechanism is arranged at the other end of the blowing mechanism, and a discharging mechanism is arranged at the bottom of the first shell (1).

2. The centrifugal fan casing volute tongue jetting device according to claim 1, wherein the jetting mechanism comprises a jetting pipe (4), the jetting pipe (4) is located inside the arc-shaped casing (3), the periphery of the jetting pipe (4) is matched with the inside of the arc-shaped casing (3), and the jetting pipe (4) is installed between the feeding mechanism and the adjusting mechanism;

the outside of the blowing pipe (4) is provided with a plurality of through holes I, and a plurality of nozzles (17) are arranged in the through holes I.

3. The centrifugal fan casing volute tongue jetting device according to claim 2, wherein the feeding mechanism comprises a first side plate (14) and a connecting pipe (5), the first side plate (14) is arranged on the side surfaces of the first shell (1), the second shell (2) and the arc-shaped shell (3), a second through hole is formed in the side surface of the first side plate (14), and one end of the jetting pipe (4) is located in the second through hole;

the connecting pipe (5) is arranged at the end part of the blowing pipe (4) close to the side plate I (14), and a feeding piece is arranged at the end part of the connecting pipe (5).

4. A centrifugal fan casing volute tongue jetting device according to claim 3, wherein the feeding member comprises a steel pipe (6) and a hose (8), the steel pipe (6) is installed at the end part of the connecting pipe (5), a valve I (7) is installed on the steel pipe (6), the hose (8) is installed at the end part of the steel pipe (6), a pump (9) is installed on the hose (8), and the end part of the hose (8) is externally connected with a water tank.

5. The centrifugal fan casing volute tongue jetting device according to claim 2, wherein the adjusting mechanism comprises a blocking piece (10) and a second side plate (15), the second side plate (15) is arranged on the side surfaces of the first shell (1), the second shell (2) and the arc-shaped shell (3), and a third through hole is formed in the side surface of the second side plate (15);

one end of the blowing pipe (4) far away from the feeding mechanism is positioned in the through hole III, and the blocking piece (10) is arranged at the end part of the blowing pipe (4).

6. The centrifugal fan casing volute tongue blowing device according to claim 5, characterized in that the end of the blocking member (10) is fitted with a handle (11);

the periphery of the blocking piece (10) is provided with threads, and the periphery of the blocking piece (10) is matched with a nut (16).

7. The centrifugal fan casing volute tongue jetting device according to claim 1, wherein the discharging mechanism comprises a discharging pipe (12), a through hole IV is formed in the bottom of the first casing (1), the discharging pipe (12) is located in the through hole IV, and a valve II (13) is installed on the discharging pipe (12).

8. Centrifugal fan housing volute tongue injection device according to claim 6, wherein the handle (11) is butterfly-shaped.

9. A blowing method of a centrifugal fan casing volute tongue blowing device, characterized in that blowing is performed by using the centrifugal fan casing volute tongue blowing device according to claim 4, comprising the steps of:

step one: the blowing pipe (4) rotates in the arc-shaped shell (3) through the adjusting mechanism, so that the nozzle (17) is positioned at a proper position;

step two: the pump (9) and the valve I (7) are quickly opened at the moment when the centrifugal fan stops, so that the nozzle (17) sprays and blows the impeller in the centrifugal fan;