A device for removing slag from the impeller of a centrifugal fan

Abstract

The present invention relates to the technical field of centrifugal fans, and discloses a device for removing molten slag from the impeller of a centrifugal fan, including a transmission mechanism. The transmission mechanism is connected to a lower cover body. A lower cover plate is arranged inside the lower cover body, and the lower cover plate is in transmission connection with the transmission mechanism. A plurality of fan impeller blades are arranged on the surface of the lower cover plate at equal intervals in a circular shape. The fan impeller blades are slidably connected to a scraping mechanism. The scraping mechanism is connected to an upper cover plate through a plurality of first connecting rods, and the scraping mechanism is connected to an upper cover body through a plurality of second connecting rods. The present invention solves the problem that the existing cleaning of the impeller blades of centrifugal fans is either to disassemble the equipment manually for cleaning or to directly inject cleaning liquid to let the centrifugal fan rotate by itself for cleaning. Although the first method can effectively clean the impeller blades of the centrifugal fan, the efficiency is low. Although the second method can clean itself, the cleaning effect on the molten particles in a high-temperature environment is poor.

Description

Technical Field

[0001] The present invention relates to the technical field of centrifugal fans, and particularly to a device for removing slag from the impeller of a centrifugal fan. Background Art

[0002] Patent No. CN111906475A discloses an automatic device for removing slag from the impeller of a centrifugal fan, belonging to the field of fan impeller processing. An automatic device for removing slag from the impeller of a centrifugal fan includes a workbench. A vertical plate is fixedly connected to the upper end of the workbench. A main shaft is rotatably connected to the side wall of the vertical plate. An assembly block cooperating with the impeller is fixedly connected to the left end of the main shaft. A motor with an output shaft fixedly connected to one end of a lead screw is fixedly installed on the upper end of the workbench. A slide plate slidably connected to the workbench is sleeved on the outer wall of the lead screw. Two cleaning plates symmetrically arranged are fixedly connected to the side wall of the slide plate through two connecting rods. A recovery groove corresponding to the position of the cleaning plates is provided on the upper end of the workbench. Scraping mechanisms are provided on the side walls of the two cleaning plates. An automatic angle-changing mechanism is provided between the slide plate and the main shaft; this invention has a high degree of automation, can remove the welding slag on the fan impeller, and has a higher cleaning efficiency and a better cleaning effect.

[0003] The main function of the centrifugal fan during welding is to remove the welding fume particles and harmful gases generated during welding, keep the air flowing, and ensure the safety and health of the operator. The centrifugal fan plays a key role in the welding dust removal system. However, during the operation of the centrifugal fan, when these impurity-containing gases pass through the centrifugal fan, due to the action of gas vortices, the impurities will be adsorbed on the non-working surfaces of the blades. If the centrifugal fan is placed in a high-temperature environment, or the inhaled gas contains molten particles, these particles will solidify after contacting the blades due to the temperature drop, and will also form slag. These slag adhering to the blade surface not only increases the load of the fan, but also destroys the balance of the impeller, resulting in increased vibration of the fan and affecting the air draft effect.

[0004] The existing cleaning of the impeller blades of centrifugal fans is either to disassemble the equipment manually for cleaning or to directly inject cleaning liquid and let the centrifugal fan rotate by itself for cleaning. The first method can effectively clean the impeller blades of the centrifugal fan, but the efficiency is low. The second method can clean itself, but the cleaning effect on the molten particles in a high-temperature environment is poor.

[0005] Therefore, a device for removing slag from the impeller of a centrifugal fan is needed to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a device for removing slag from the impeller of a centrifugal fan to solve the problems raised in the above background art.

[0007] To solve the above technical problems, the technical solution of the present invention is: a slag removal device for a centrifugal fan impeller, comprising a transmission mechanism, a scraping mechanism and a separating mechanism. The transmission mechanism is connected to the lower cover body. A lower cover plate is arranged inside the lower cover body, and the lower cover plate is in transmission connection with the transmission mechanism. A plurality of fan impeller blades are arranged on the surface of the lower cover plate at equal intervals in a circular shape. The fan impeller blades are slidably connected to the scraping mechanism. The scraping mechanism is connected to the upper cover plate through a plurality of first connecting rods, and the scraping mechanism is connected to the upper cover body through a plurality of second connecting rods;

[0008] The scraping mechanism includes a first electric telescopic rod and a first scraper. The surface of the output end of the first electric telescopic rod is connected to the inner ring of the bearing, and the outer ring of the bearing is connected to the inner ring of the lower cover plate. The outer ring of the rod body at one end of the first electric telescopic rod is rotatably connected to the inner ring of the rotating sleeve. The driving of the fan impeller blades by the transmission mechanism drives the upper cover plate, the first scraper and the rotating sleeve to rotate. A plurality of hollow scraping grooves are arranged on the first scraper at equal intervals in a circular shape, and the scraping grooves are slidably connected to the surface of the fan impeller blades;

[0009] The separating mechanism includes a second electric telescopic rod. The second electric telescopic rod is connected to the lower cover body. The output end of the second electric telescopic rod is connected to one end of a symmetrically arranged guiding block. The guiding block is in sliding contact with the second scraper. The two guiding blocks are slidably connected to both sides of an arc-shaped rack. The arc-shaped rack is in transmission connection with the output end of a servo motor. The servo motor is fixedly connected to the guiding block. The inner ring of the arc-shaped rack is connected to the second scraper. When the second electric telescopic rod extends, the second scraper contacts the molten slag guiding block. The molten slag guiding block is connected to the inner wall of the sewage discharge groove opened on the lower cover body.

[0010] Further, the other end of the rotating sleeve is connected to the upper cover plate through a plurality of first connecting rods.

[0011] Further, the sewage discharge groove is slidably connected to the sliding grooves opened on both sides of the collection box.

[0012] Further, the other end of the first electric telescopic rod is connected to the upper cover body through a plurality of second connecting rods, and the outer ring of the upper cover body is slidably connected to the inner wall of the lower cover body.

[0013] Further, a liquid inlet is opened at the upper end of the lower cover body, and the liquid inlet is connected to a hose.

[0014] Compared with the prior art, the technical solution of the present invention has the following advantages:

[0015] (1) By starting the scraping mechanism, the particles on the fan impeller blades can be scraped to one side, and then under the action of centrifugal force, the slag is thrown out. At the same time, the molten particles in the high-temperature environment adhere to the fan impeller blades and the upper cover plate, and solidify due to the temperature drop. The scraping mechanism can guide and scrape the molten particles on the fan impeller blades and the upper cover plate, thus avoiding the increase in the load of the fan, affecting the balance of the impeller, aggravating the vibration, and resulting in a poor air extraction effect.

[0016] (2) The collection box can uniformly collect the slag particles leaving the molten guide block, avoiding environmental pollution; and the sliding connection between the outer circle of the upper cover and the inner wall of the lower cover can cut off the slag particles on the molten guide block, preventing the slag particles from being unable to separate from the molten guide block and enter the collection box; the liquid inlet opened at the upper end of the lower cover can better and conveniently input the cleaner fused with warm water, so as to better cooperate with the scraping mechanism and the separation mechanism to remove the slag particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the overall structure at the bottom of the present invention;

[0019] Figure 3 It is an exploded view of the present invention;

[0020] Figure 4 It is a schematic diagram of the internal structure of the lower cover in the present invention;

[0021] Figure 5 It is a schematic diagram of the structure of the scraping mechanism in the present invention;

[0022] Figure 6 For Figure 5 Enlarged view at A in

[0023] Figure 7 It is a schematic diagram of the structure of the separation mechanism separating the slag from the scraping mechanism in the present invention;

[0024] Figure 8 It is a schematic diagram of the structure of the separation mechanism in the present invention;

[0025] Figure 9 It is a schematic diagram of the structure of the separation mechanism separating the slag in the present invention;

[0026] Figure 10 For Figure 9 Enlarged view at B in

[0027] Figure 11 It is a schematic diagram of the structure of the collection box in the present invention.

[0028] In the figure: 1 - transmission mechanism, 2 - upper cover body, 3 - lower cover body, 4 - scraping mechanism, 41 - first electric telescopic rod, 42 - first scraper, 421 - scraping groove, 5 - separating mechanism, 51 - second electric telescopic rod, 52 - guiding block, 53 - arc-shaped rack, 54 - servo motor, 55 - second scraper, 56 - guiding melting block, 6 - fan impeller blades, 8 - lower cover plate, 9 - upper cover plate, 10 - bearing, 11 - collection box, 111 - sliding groove, 12 - rotating sleeve. Specific embodiments

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the following will clearly and completely describe the technical solutions of the embodiments of the present disclosure with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present disclosure.

[0030] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall have the ordinary meanings understood by those of ordinary skill in the art to which the present disclosure pertains. The terms "including" or "comprising" and the like used in the present disclosure mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. "Connection" or "coupling" and the like do not limit to physical or mechanical connections, and may also include electrical connections, whether direct or indirect. "Upper", "lower", "left", "right", etc. are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0031] As Figures 1 to 11 As shown, a centrifugal fan impeller slag removal device provided by the present invention includes a transmission mechanism 1. The transmission mechanism 1 is connected to the lower cover body 3. A lower cover plate 8 is arranged inside the lower cover body 3, and the lower cover plate 8 is in transmission connection with the transmission mechanism 1. A plurality of fan impeller blades 6 are arranged on the surface of the lower cover plate 8 at equal intervals in a circular shape. The fan impeller blades 6 are slidably connected to the scraping mechanism 4. The scraping mechanism 4 is connected to the upper cover plate 9 through a plurality of first connecting rods, and the scraping mechanism 4 is connected to the upper cover body 2 through a plurality of second connecting rods. By starting the scraping mechanism 4, the particles on the fan impeller blades 6 can be scraped to one side, and then the slag is thrown out under the action of centrifugal force. At the same time, the molten particles in the high-temperature environment adhere to the fan impeller blades 6 and the upper cover plate 9 and solidify due to the temperature reduction. The scraping mechanism 4 can guide and scrape the molten particles on the fan impeller blades 6 and the upper cover plate 9, thereby avoiding the increase in the load of the fan, affecting the balance of the impeller, aggravating the vibration, and resulting in a poor air guiding effect.

[0032] The scraping mechanism 4 includes a first electric telescopic rod 41. The surface of the output end of the first electric telescopic rod 41 is connected to the inner ring of the bearing 10. The outer ring of the bearing 10 is connected to the inner ring of the lower cover plate 8. The outer ring of the rod body at one end of the first electric telescopic rod 41 is rotatably connected to the inner ring of the rotating sleeve 12. The outer ring at one end of the rotating sleeve 12 is rotatably connected to the inner ring of the first scraper 42. The first scraper 42 is provided with a plurality of hollowed-out scraping grooves 421 at equal intervals in a circular shape. The inner wall of the scraping groove 421 is in sliding connection with the surface of the fan impeller blade 6. The surface of the first scraper 42 and the outer ring of the rotating sleeve 12 are both in contact with the separating mechanism 5. By driving the rod body of the first electric telescopic rod 41, the rotating sleeve 12 and the first scraper 42 are moved. The first scraper 42, which is provided with a plurality of hollowed-out scraping grooves 421 at equal intervals in a circular shape, will scrape and gather the particles on the surface of the fan impeller blade 6 together. Then, under the drive of the transmission mechanism 1, the fan impeller blade 6 rotates, and under the action of centrifugal force, the particles are thrown out, thereby avoiding increasing the load of the centrifugal fan.

[0033] The other end of the rotating sleeve 12 is connected to the upper cover plate 9 through a plurality of first connecting rods. The surface of the upper cover plate 9 is in contact with the separating mechanism 5. The separating mechanism 5 includes a second electric telescopic rod 51. The second electric telescopic rod 51 is connected to the lower housing 3. The output end of the second electric telescopic rod 51 is connected to one end of a symmetrically arranged guiding block 52. The guiding block 52 is in sliding contact with the second scraper 55. In a high-temperature environment or when the gas inhaled by the centrifugal fan contains molten particles, these particles will adhere to the surface of the fan impeller blade 6 when they come into contact with it, resulting in an increase in the load of the centrifugal fan. By the second electric telescopic rod 51 driving the guiding block 52 and the second scraper 55, and then under the transmission of the transmission mechanism 1, the fan impeller blade 6 drives the upper cover plate 9, the first scraper 42 and the rotating sleeve 12 to rotate, so that the second scraper 55 scrapes off the molten particles on the fan impeller blade 6 and the upper cover plate 9, thereby reducing the load of the centrifugal fan.

[0034] The two guiding blocks 52 are in sliding connection with both sides of the arc-shaped rack 53. The arc-shaped rack 53 is in transmission connection with the output end of the servo motor 54. The servo motor 54 is fixedly connected to the guiding block 52. The inner ring of the arc-shaped rack 53 is connected to the second scraper 55. The second scraper 55 is in contact with the molten slag guiding block 56. The molten slag guiding block 56 is connected to the inner wall of the sewage discharge groove opened on the lower housing 3. By further extending the second electric telescopic rod 51, the second scraper 55 is caused to contact the molten slag guiding block 56. Then, the servo motor 54 drives the arc-shaped rack 53 to move. Further, the arc-shaped rack 53 drives the second scraper 55 to move, so that the slag particles on the second scraper 55 are scraped onto the molten slag guiding block 56, and then under the action of gravity, they are separated from the molten slag guiding block 56 or are blown off the molten slag guiding block 56 by the centrifugal wind force of the fan impeller blade 6.

[0035] The sewage discharge groove is in sliding connection with the sliding grooves 111 opened on both sides of the collection box 11. Through the collection box 11, the slag particles leaving the molten slag guiding block 56 can be uniformly collected to avoid polluting the environment.

[0036] The other end of the first electric telescopic rod 41 is connected to the upper cover 2 through a plurality of second connecting rods. The outer ring of the upper cover 2 is slidably connected to the inner wall of the lower cover 3. By the sliding connection between the outer ring of the upper cover 2 and the inner wall of the lower cover 3, the slag particles on the guide melting block 56 can be cut off, preventing the slag particles from failing to break away from the guide melting block 56 and enter the collection box 11.

[0037] A liquid inlet is provided at the upper end of the lower cover 3, and the liquid inlet is connected to a hose. Through the liquid inlet provided at the upper end of the lower cover 3, the cleaner mixed with warm water can be input better and more conveniently, so as to better cooperate with the scraping mechanism 4 and the separating mechanism 5 to remove the slag particles.

[0038] The above embodiments are only exemplary embodiments of the present invention and are not used to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements within the essence and protection scope of the present invention, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present invention.

Claims

1. A centrifugal fan impeller slag removal device, comprising a transmission mechanism (1), a scraping mechanism (4) and a separation mechanism (5), characterized in that: The transmission mechanism (1) is connected to the lower cover body (3), a lower cover plate (8) is arranged inside the lower cover body (3), the lower cover plate (8) is transmission-connected to the transmission mechanism (1), a plurality of fan impeller blades (6) are arranged in an annular shape and at equal intervals on the surface of the lower cover plate (8), the fan impeller blades (6) are slidably connected to the scraping mechanism (4), the scraping mechanism (4) is connected to the upper cover plate (9) via a plurality of first connecting rods, and the scraping mechanism (4) is connected to the upper cover body (2) via a plurality of second connecting rods; The scraping mechanism (4) comprises a first electric telescopic rod (41) and a first scraper (42); the output end surface of the first electric telescopic rod (41) is connected to the inner ring of the bearing (10); the outer ring of the bearing (10) is connected to the inner ring of the lower cover plate (8); the outer ring of the rod at one end of the first electric telescopic rod (41) is rotatably connected to the inner ring of the rotating sleeve (12); the lower fan impeller blade (6) driven by the transmission mechanism (1) drives the upper cover plate (9), the first scraper (42) and the rotating sleeve (12) to rotate; the first scraper (42) is provided with a plurality of hollow scraping grooves (421) at equal intervals in a ring shape; the scraping grooves (421) are slidably connected to the surface of the fan impeller blade (6); The disengagement mechanism (5) comprises a second electric telescopic rod (51), the second electric telescopic rod (51) is connected to the lower cover body (3), the output end of the second electric telescopic rod (51) is connected to one end of a symmetrically arranged guide block (52), the guide block (52) is in sliding contact with a second scraper (55), the guide blocks (52) are in sliding connection with both sides of an arc-shaped rack (53), the arc-shaped rack (53) is transmission-connected to the output end of a servo motor (54), the servo motor (54) is fixedly connected to the guide block (52), the inner ring of the arc-shaped rack (53) is connected to the second scraper (55), the second electric telescopic rod (51) is extended so that the second scraper (55) contacts with a guide block (56), and the guide block (56) is connected to the inner wall of a sewage discharge groove provided in the lower cover body (3).

2. The centrifugal fan impeller slag removal device according to claim 1, characterized in that: The other end of the rotating sleeve (12) is connected to the upper cover plate (9) via a plurality of first connecting rods.

3. The centrifugal fan impeller slag removal device according to claim 1, characterized in that: The sewage discharge trough is slidably connected to the slide grooves (111) provided on both sides of the collection box (11).

4. The centrifugal fan impeller slag removal device according to claim 1, characterized in that: The other end of the first electric telescopic rod (41) is connected to the upper cover body (2) via a plurality of second connecting rods, and the outer ring of the upper cover body (2) is slidably connected to the inner wall of the lower cover body (3).

5. The centrifugal fan impeller slag removal device according to claim 4, characterized in that: The upper end of the lower cover body (3) is provided with a liquid inlet, and the liquid inlet is connected to a hose.

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