A centrifugal multi-blade fan

Abstract

This invention relates to the field of fan and ventilation machinery manufacturing, specifically a centrifugal multi-blade fan, including a base. A support seat is installed on one side of the top of the base, and a housing is installed on the other side of the top of the base. This invention uses a spray wheel assembly to detach the side and bottom housings from the outer housing, allowing the impeller to enter the spray area. The purpose is to expose the impeller to the spray wheel assembly for rapid subsequent spraying. Simultaneously, the bottom housing is also removed from the outer housing to quickly clean up accumulated impurities at the bottom of the housing, improving spraying efficiency. The spray wheel assembly can simultaneously spray and clean accumulated impurities on the impeller surface and the inner wall of the bottom housing, improving cleaning efficiency. Furthermore, the separable design of the side and bottom housings from the outer housing, along with the rotatable and extendable structure of the spray rod, makes the cleaning operation more convenient and flexible. The impeller can be exposed to the spray area as needed, improving the targeting and operability of the cleaning process and achieving automated cleaning.

Description

Technical Field

[0001] This invention relates to the field of fan and ventilation machinery manufacturing, specifically a centrifugal multi-blade fan. Background Technology

[0002] A centrifugal multi-blade fan is a device that generates centrifugal force through impeller rotation, thereby energizing and expelling air. It typically consists of an impeller, a casing, a motor, and other components. In some industrial production processes, such as mining, metallurgy, and building materials, a large amount of dust is generated. The powerful airflow generated by a centrifugal multi-blade fan is needed to draw the dust-laden air into a dust collector for purification, reducing the harm of dust to the environment and human health, and thus providing a comfortable and safe environment for people's production and life.

[0003] The existing centrifugal multi-blade fan has certain drawbacks: During the operation of the centrifugal multi-blade fan, air is constantly being drawn in and expelled. The air may contain impurities such as dust, particulate matter, and fibers. These impurities are carried to the impeller surface by the airflow. Since the impeller and the casing are usually fixedly connected, it is difficult to clean specific parts individually. The existing solution is to disassemble the casing in sections and then clean along multiple angles of the impeller, which is cumbersome, time-consuming, and labor-intensive. Secondly, impurities in the air carried by the impeller will diffuse outward under the action of centrifugal force, but due to the influence of gravity, some of the heavier impurities will gradually settle to the bottom of the casing. Especially after the fan has been running for a period of time, the accumulation of impurities will increase. The existing method of manually cleaning the bottom of the casing with a vacuum cleaner is time-consuming, labor-intensive, and has low cleaning efficiency.

[0004] Therefore, it is necessary to propose a centrifugal multi-blade fan to solve the above-mentioned technical problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a centrifugal multi-blade fan that solves the technical problem of low cleaning efficiency of impurities on the impeller surface and at the bottom of the casing.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0007] The technical solution adopted by the present invention to solve its technical problem is: a centrifugal multi-blade fan, including a base, a support seat installed on one side of the top of the base, a housing installed on the other side of the top of the base, an impeller provided on one side of the housing, and a motor for driving the impeller to rotate on the support seat;

[0008] The outer casing has a circular hole on its side wall for extending the impeller out of the outer casing. A side shell is provided on one side of the outer casing, and the side shell is adapted to the circular hole.

[0009] The bottom wall of the outer shell is provided with an arc-shaped hole, which is used to quickly discharge impurities accumulated on the inner wall of the outer shell. A bottom shell is provided on one side of the outer shell, and the cross-section of the bottom shell is L-shaped.

[0010] Two limiting rods are installed on the outer shell, and a limiting cylinder is installed on one side of the side shell corresponding to the two limiting rods. The limiting rods are slidably connected inside the limiting cylinder.

[0011] The spray wheel assembly, located above the support base, is used to simultaneously spray accumulated impurities on the impeller surface and the inner wall of the bottom shell.

[0012] The spray shell assembly, located inside the housing, is used to spray impurities adhering to the inner wall of the housing.

[0013] Preferably, the spray wheel assembly includes a support base connected to the top surface of the support base via a slide rail connection. The motor is mounted on the movable base via a motor mount. The right side of the movable base is fixedly connected to the side shell. The side wall of the L-shaped component is connected to the L-shaped component via a slide rail connection. The vertical end of the L-shaped component is fixedly connected to the horizontal end of the bottom shell. The left side of the support base is slidably connected to two drive rods that are fixedly connected to the movable base and the L-shaped component respectively. An electric push rod is installed on the left side of the support base. The moving end of the electric push rod is snapped with a push plate that is fixedly connected to the two drive rods. One of the limiting rods is located directly above the side shell and has a semi-arc shape. A spray rod is rotatably connected to the inner side of the limiting rod located above the side shell. Three opening slots are evenly opened below the spray rod. A first spray gun head is snapped into each of the three opening slots. When the side shell is away from the outer shell, the spray rod can extend out of the limiting cylinder and rotate on the side wall of the impeller in an inclined arrangement.

[0014] Preferably, the first spray gun head located in the middle opening slot is arranged along the vertical plane of the impeller, the first spray gun head located in the rear opening slot is arranged towards the left side wall of the impeller, and the first spray gun head located in the front opening slot is arranged towards the right side wall of the impeller.

[0015] Preferably, a sliding groove is provided below the spray bar and between the spaced opening slots, and a supporting arc plate is installed below the limiting rod at the top of the side shell. A roller is rotatably connected to the side of the supporting arc plate corresponding to the sliding groove, and the roller is slidably connected along the sliding groove.

[0016] Preferably, the top surface of the spray rod and the inner arc surface of the limiting rod are provided with a repulsive magnetic material, and the limiting cylinder can drive the spray rod to rotate stably along the limiting rod by the repulsive force of the magnetic material when the limiting rod is extended.

[0017] Preferably, when the impeller extends out of the housing, there is a space between its side wall and the housing. Another limiting rod has an inclined groove at one end near the housing and on the side near the impeller. Multiple second spray gun heads are snapped onto the side portion of the inclined groove, and the multiple second spray gun heads are arranged in an inclined manner in the space.

[0018] Preferably, a third spray gun head is installed on one side of the other limiting rod near the bottom shell. There is at least one third spray gun head, which is arranged in an alternating pattern. The spray direction of the third spray gun head is bent along the arc surface of the bottom shell.

[0019] Preferably, the spray shell assembly includes a plug rod disposed in the middle of the impeller, a telescopic assembly disposed above the plug rod, an arc-shaped spray shell plate disposed at the end of the telescopic assembly away from the plug rod, a fourth spray gun head arranged in a rectangular array being snapped onto the top surface of the spray shell plate, and the front and rear ends of the spray shell plate being set as inclined surfaces, with a fifth spray gun head snapped onto the inclined surface.

[0020] Preferably, a plug-in cylinder is installed in the middle of the impeller, a rotating groove is opened inside the plug-in cylinder, a spring plate is installed inside the plug-in cylinder, a symmetrically arranged limiting block is installed at one end of the plug-in rod near the plug-in cylinder, a limiting groove adapted to the limiting block is opened on the inner side wall of the plug-in cylinder, and a locking groove arranged perpendicular to the side shell is opened at the end of the rotating groove away from the spring plate. When the plug-in rod is fixed inside the plug-in cylinder, the limiting block is arranged inside the locking groove, and the spring plate is tightly attached to the side wall of the plug-in rod.

[0021] Preferably, the telescopic assembly includes a telescopic cylinder snapped onto the top of the plug rod. The inner sidewall of the telescopic cylinder has a moving groove, and the sidewall of the moving groove has multiple positioning holes communicating with it. A telescopic rod is slidably connected to the top of the telescopic cylinder. One end of the telescopic rod extends into the inner side of the telescopic cylinder and is fitted with a driving L-shaped component. The vertical end of the driving L-shaped component extends out of one of the positioning holes. An expansion spring is installed on the inner side of the telescopic cylinder, and the expansion spring is tightly attached to the driving L-shaped component below it.

[0022] Beneficial effects:

[0023] (1) This invention sets up a spray wheel assembly to drive the side shell and bottom shell to detach from the outer shell, so that the impeller can enter the spray area. The purpose is to expose the impeller on the spray wheel assembly, which facilitates rapid spraying later. At the same time, the bottom shell is also removed from the inside of the outer shell, which is to quickly clean the impurities accumulated at the bottom of the outer shell and improve the spraying efficiency. The spray wheel assembly can simultaneously spray and clean the accumulated impurities on the impeller surface and the inner wall of the bottom shell, which improves the cleaning efficiency. At the same time, the design that the side shell, bottom shell and outer shell can be separated, as well as the rotating and extending structure of the spray rod, makes the cleaning operation more convenient and flexible. The impeller can be exposed in the spray area as needed, which improves the targeting and operability of the cleaning, realizes the automated cleaning operation, reduces manual intervention, improves work efficiency, and also reduces the labor intensity and safety risks of manual cleaning.

[0024] (2) This invention, by setting up a spray shell assembly, uses a fourth spray gun head to spray along the perimeter of the shell and a fifth spray gun head to spray along the sidewall of the shell. The combination of the two can fully cover the inner wall of the shell, ensuring that all parts of the inner wall of the shell are cleaned and avoiding the residue of impurities. With the cooperation of the plug-in cylinder, rotating groove, spring plate and limiting block, when it is necessary to install the spray shell assembly, simply insert the plug-in rod into the plug-in cylinder, and let the limiting block slide along the limiting groove and lock into the locking groove to complete the installation. The operation is simple and convenient, without complicated tools and cumbersome steps, which greatly saves installation time and labor costs. This invention also sets up a telescopic component design, which allows the position of the spray shell plate to be flexibly adjusted according to actual needs, improving the adaptability and flexibility of the equipment.

[0025] (3) The present invention also provides three first spray gun heads arranged in different directions to cooperate with each other, which can achieve full coverage of the impeller surface. Whether it is the front, side or the junction with the shell of the impeller, it can be effectively cleaned, avoiding the residue of impurities on the impeller surface and ensuring the cleanliness of the impeller. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is another schematic diagram of the overall structure of the present invention;

[0029] Figure 3 This is a schematic diagram of the spray wheel assembly of the present invention;

[0030] Figure 4 This is a partial cross-sectional view of the limiting rod of the present invention;

[0031] Figure 5 for Figure 3A magnified view of part A in the image;

[0032] Figure 6 This is a schematic diagram of the second and third spray gun heads of the present invention;

[0033] Figure 7 This is a schematic diagram of the spray shell assembly of the present invention;

[0034] Figure 8 This is a cross-sectional view of the plug-in sleeve of the present invention;

[0035] Figure 9 This is a schematic diagram of the telescopic component of the present invention.

[0036] In the diagram: 1. Base; 12. Support base; 13. Outer shell; 14. Impeller; 15. Side shell; 16. Bottom shell; 17. Limiting rod; 18. Limiting cylinder;

[0037] 21. Spray wheel assembly; 22. Moving seat; 23. L-shaped part; 24. Drive rod; 25. Electric push rod; 26. Spray bar; 27. First spray gun head; 211. Slide groove; 212. Support arc plate; 213. Roller; 221. Inclined groove; 222. Second spray gun head; 223. Third spray gun head; Spray shell assembly; 31. Insert rod; 32. Telescopic assembly; 33. Spray shell plate; 34. Fourth spray gun head; 35. Fifth spray gun head; 311. Insert cylinder; 312. Rotary groove; 313. Spring plate; 314. Limiting block; 315. Limiting groove; 316. Locking groove; 321. Telescopic cylinder; 322. Moving groove; 323. Positioning hole; 324. Telescopic rod; 325. Drive L-shaped part; 326. Expansion spring. Detailed Implementation

[0038] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0039] like Figures 1-2As shown, a centrifugal multi-blade fan includes a base 1, a support 12 mounted on one side of the top of the base 1, and a housing 13 mounted on the other side of the top of the base 1. An impeller 14 is disposed on one side of the housing 13. A motor for driving the impeller 14 to rotate is disposed on the support 12. A circular hole is formed in the side wall of the housing 13 for the impeller 14 to extend out of the housing 13. A side shell 15 is disposed on one side of the housing 13 and is adapted to the circular hole. An arc-shaped hole is formed in the bottom wall of the housing 13 for collecting the inner wall of the housing 13. Impurities are quickly discharged. A bottom shell 16 is provided on one side of the outer shell 13. The bottom shell 16 has an L-shaped cross-section. Two limiting rods 17 are installed on the outer shell 13. A limiting cylinder 18 is installed on one side of the side shell 15 corresponding to the two limiting rods 17. The limiting rods 17 are slidably connected inside the limiting cylinder 18. The spray wheel assembly 2 is located above the support base 12 and is used to synchronously spray the accumulated impurities on the surface of the impeller 14 and the inner wall of the bottom shell 16. The spray shell assembly 3 is located inside the outer shell 13 and is used to spray the impurities adhering to the inner wall of the outer shell 13.

[0040] When it is necessary to clean impurities from the surface of the impeller 14 and the inner wall of the outer casing 13, the side casing 15 and the bottom casing 16 are driven away from the outer casing 13 by the spray wheel assembly 2, so that the impeller 14 can enter the spray area. The purpose is to expose the impeller 14 on the spray wheel assembly 2 for easy rapid spraying later. At the same time, the bottom casing 16 is also moved out of the outer casing 13. The purpose is to quickly clean the impurities accumulated at the bottom of the outer casing 13 and improve the spraying efficiency.

[0041] like Figures 1-4 As shown, the spray wheel assembly 2 includes a support base 12 connected to the top surface of the support base 12 via a slide rail. A motor is mounted on a movable base 21 via a motor mount. The right side of the movable base 21 is fixedly connected to the side shell 15. An L-shaped component 22 is connected to the side wall of the L-shaped component 22 via a slide rail. The vertical end of the L-shaped component 22 is fixedly connected to the horizontal end of the bottom shell 16. Two drive rods 23, which are fixedly connected to the movable base 21 and the L-shaped component 22 respectively, are slidably connected to the left side of the support base 12. An electric push rod 24 is installed on the left side of the support base 12. The moving end of the electric push rod 24 is snapped with a push plate fixedly connected to the two drive rods 23. One of the limiting rods 17 is located directly above the side shell 15 and has a semi-circular structure. The inner side of the limiting rod 17 located above the side shell 15 is rotatably connected to the spray rod 25. Three opening slots are evenly opened below the spray rod 25, and the first spray gun head 26 is snapped into each of the three opening slots. An air compressor is installed on the front side of the support base 12. The output end of the air compressor passes through the inside of the limiting cylinder 18 through the spray pipe. The spray pipe and the first spray gun head 26 are fixedly connected. When the side shell 15 is away from the outer shell 13, the spray rod 25 can extend out of the limiting cylinder 18 and rotate on the side wall of the impeller 14 in an inclined manner.

[0042] It should be noted that the electric push rod 24 drives the drive rod 23 to move through the push plate, and the moving seat 21 and L-shaped part 22 move accordingly, thereby driving the side shell 15 and bottom shell 16 to move quickly out of the outer shell 13. The arc-shaped hole opened in the bottom wall of the outer shell 13 can quickly discharge the impurities accumulated on the inner wall of the outer shell 13. The limiting cylinder 18 extends from the limiting rod 17. The spray rod 25 on the limiting rod 17 rotates downward under the action of gravity, so that the spray rod 25 is inclined and aligned on the impeller 14. The air compressor and motor are started, and the motor drives the impeller 14 to rotate slowly. The first spray gun head 26 on the spray rod 25 can spray on the surface around the impeller 14. During the spraying process, impurities are removed through the surface of the bottom shell 16, improving the spraying efficiency.

[0043] The spray wheel assembly 2 can simultaneously spray and clean the accumulated impurities on the surface of the impeller 14 and the inner wall of the bottom shell 16, improving cleaning efficiency. At the same time, the design of the side shell 15, bottom shell 16 and outer shell 13 being separable, as well as the rotatable and extendable structure of the spray rod 25, makes the cleaning operation more convenient and flexible. The impeller 14 can be exposed to the spraying area as needed, improving the targeting and operability of the cleaning, realizing automated cleaning operation, reducing manual intervention, improving work efficiency, and at the same time reducing the labor intensity and safety risks of manual cleaning.

[0044] It is worth noting that the front and rear ends of the bottom shell 16 are pointed structures, which facilitates the limiting function with the outer shell 13, and the edge of its pointed end is provided with a sealing gasket to improve the sealing effect of the outer shell 13.

[0045] like Figures 3-5 As shown, the first spray gun head 26 located in the middle opening slot is arranged along the vertical plane of the impeller 14, the first spray gun head 26 located in the rear opening slot is arranged towards the left side wall of the impeller 14, and the first spray gun head 26 located in the front opening slot is arranged towards the right side wall of the impeller 14.

[0046] It should be noted that when the centrifugal multi-blade fan is cleaning impurities, the first spray gun head 26 located at different positions on the spray bar 25 has a specific arrangement direction. The first spray gun head 26 in the middle opening slot is arranged along the vertical plane of the impeller 14, which can directly spray the front of the impeller 14. The first spray gun head 26 in the rear opening slot is arranged towards the left side wall of the impeller 14, which can spray the left side of the impeller 14. The first spray gun head 26 in the front opening slot is arranged towards the right side wall of the impeller 14, which can spray the right side of the impeller 14 in the same way.

[0047] The three first spray gun heads 26 arranged in different directions work together to achieve full coverage of the impeller 14 surface. Whether it is the front, side or the junction with the outer shell 13 of the impeller 14, it can be effectively cleaned, avoiding the residue of impurities on the impeller 14 surface and ensuring the cleanliness of the impeller 14.

[0048] like Figures 3-4 As shown, a sliding groove 211 is provided below the spray bar 25 and between the spaced opening slots. A supporting arc plate 212 is installed below the limiting rod 17 at the top of the side shell 15. A roller 213 is rotatably connected to one side of the supporting arc plate 212 corresponding to the sliding groove 211. The roller 213 slides along the sliding groove 211.

[0049] It should be noted that when the side shell 15 moves, the limiting cylinder 18 extends outward from the limiting rod 17. During this process, the supporting arc plate 212 moves together with the limiting rod 17, and the rollers 213 on the supporting arc plate 212 slide on the slide groove 211. The sliding of the rollers 213 on the slide groove 211 serves to limit and guide, ensuring the relative position of the spray rod 25 remains stable during the movement of the side shell 15, while ensuring that the direction of movement of the spray rod 25 is consistent with the direction of movement of the side shell 15, which can effectively prevent the spray rod 25 from shaking or deviating. This ensures that the spray rod 25 always remains in the correct position so that it can accurately spray and clean the impeller 14 when needed.

[0050] It is worth noting that, through the sliding cooperation of the limiting cylinder 18 and the limiting rod 17, the present invention firstly limits the side shell 15, and secondly protects the first spray gun head 26 inside the spray rod 25.

[0051] The top surface of the spray rod 25 and the inner arc surface of the limiting rod 17 are provided with a repulsive magnetic material. When the limiting rod 17 is extended, the limiting cylinder 18 can drive the spray rod 25 to rotate stably along the limiting rod 17 through the repulsive force of the magnetic material.

[0052] It should be noted that when the impeller 14 extends out of the outer casing 13, there is a space between its side wall and the outer casing 13. Another limiting rod 17 has a groove 221 on one end near the outer casing 13 and on the side near the impeller 14. Multiple second spray gun heads 222 are snapped onto the side part of the groove 221. The multiple second spray gun heads 222 are arranged in an inclined manner in the space.

[0053] When the equipment does not need to spray, the magnetic materials on the top surface of the spray rod 25 and the inner arc surface of the limiting rod 17 repel each other, so that the spray rod 25 remains stable inside the limiting rod 17. This stabilizing effect can prevent the spray rod 25 from shaking or shifting at will when not in operation, and avoid damage to the spray rod 25 due to accidental collisions or other situations.

[0054] When the limiting cylinder 18 extends from the limiting rod 17, the repulsive force of the magnetic material can drive the spray rod 25 to rotate stably along the limiting rod 17. This stable rotation helps to accurately adjust the spray rod 25 to the optimal spray position, ensuring that the first spray gun head 26 can be aligned with the impeller 14 for effective impurity cleaning.

[0055] like Figure 2 and Figure 6 As shown, another limiting rod 17 is equipped with a third spray gun head 223 on one side near the bottom shell 16, and the output end of the air compressor passes through the inside of the limiting cylinder 18 through the spray pipe and is fixedly connected to it. There is at least one third spray gun head 223, and they are arranged in an alternating manner. The spray direction of the third spray gun head 223 is bent along the arc surface of the bottom shell 16.

[0056] It should be noted that after the air compressor starts, the compressed gas passes through the injection pipe, enters the limiting cylinder 18, and is delivered to the third spray head 223. Since the spray direction of the third spray head 223 bends along the arc surface of the bottom shell 16, when the gas is sprayed out from the third spray head 223, it will flow along the arc surface of the bottom shell 16. The bottom shell 16 has an arc-shaped structure, which can guide the gas and make the gas flow along a specific path, thereby enhancing the fluidity of the gas and enabling more concentrated spraying and cleaning of impurities on the bottom shell 16.

[0057] It is worth noting that the third spray head 223 is positioned at the highest point of the bottom shell 16 so that the third spray head 223 can achieve a comprehensive spraying effect on the entire curved surface of the bottom shell 16.

[0058] like Figure 2 and Figure 7 As shown, the spray shell assembly 3 includes a plug rod 31 located in the middle of the impeller 14. A telescopic assembly 32 is located above the plug rod 31. An arc-shaped spray shell plate 33 is located at the end of the telescopic assembly 32 away from the plug rod 31. A fourth spray gun head 34 arranged in a rectangular array is snapped onto the top surface of the spray shell plate 33. The front and rear ends of the spray shell plate 33 are set as inclined surfaces, and a fifth spray gun head 35 is snapped onto the inclined surface. The output end of the air compressor passes through the spray shell plate 33 through the spray pipe and is fixedly connected to the fourth spray gun head 34 and the fifth spray gun head 35.

[0059] It should be noted that when the impeller 14 rotates slowly, since the impeller 14 is connected to the connector 31, the connector 31 and the spray shell plate 33 also rotate. The fourth spray head 34 on the spray shell plate 33 can spray along the periphery of the outer shell 13. The fourth spray head 34 is distributed in a rectangular array, which can clean the periphery of the outer shell 13 relatively evenly. At the same time, the fifth spray head 35 can spray in the direction of the side wall of the outer shell 13. The fifth spray head 35 is located on the inclined surface at the front and rear ends of the spray shell plate 33, which can better align the spray with the side wall of the outer shell 13. The spray of the fourth spray head 34 and the fifth spray head 35 causes the impurities inside the outer shell 13 to be loosened by the impact force. Since the bottom wall of the outer shell 13 has an arc-shaped hole, the impurities can be discharged along the arc-shaped hole under the spray action of the spray head.

[0060] The present invention sprays along the periphery of the outer shell 13 with a fourth spray gun head 34 and sprays in the direction of the side wall of the outer shell 13 with a fifth spray gun head 35. The combination of the two can fully cover the inner side wall of the outer shell 13, ensuring that all parts of the inner wall of the outer shell 13 can be cleaned and avoiding the residue of impurities.

[0061] like Figure 7 and Figure 8 As shown, a plug-in cylinder 311 is installed in the middle of the impeller 14. A rotating groove 312 is opened inside the plug-in cylinder 311. A spring plate 313 is installed inside the plug-in cylinder 311. A symmetrically arranged limiting block 314 is installed at one end of the plug-in rod 31 near the plug-in cylinder 311. A limiting groove 315 that matches the limiting block 314 is opened on the inner side wall of the plug-in cylinder 311. A locking groove 316 that is perpendicular to the side shell 15 is opened at the end of the rotating groove 312 away from the spring plate 313. When the plug-in rod 31 is fixed inside the plug-in cylinder 311, the limiting block 314 is arranged inside the locking groove 316, and the spring plate 313 is tightly attached to the side wall of the plug-in rod 31.

[0062] It should be noted that when the plug rod 31 is fixed inside the plug tube 311, the limiting block 314 is arranged inside the locking groove 316. At this time, the spring plate 313 is tightly attached to the side wall of the plug rod 31, providing a certain pressure so that the limiting block 314 is stably locked in the locking groove 316, thereby realizing the fixed connection between the plug rod 31 and the plug tube 311. When it is necessary to disassemble the plug rod 31, a certain external force can be applied to make the plug rod 31 overcome the pressure of the spring plate 313, and the limiting block 314 can be moved out of the locking groove 316. Then, it can slide along the limiting groove 315 to pull the plug rod 31 out of the plug tube 311. When it is necessary to install the spray shell assembly 3, simply insert the plug rod 31 into the plug tube 311, and let the limiting block 314 slide along the limiting groove 315 and lock into the locking groove 316 to complete the installation. The operation is simple and convenient.

[0063] like Figure 7 and Figure 9As shown, the telescopic assembly 32 includes a telescopic cylinder 321 that is snapped onto the top of the plug rod 31. The inner side wall of the telescopic cylinder 321 has a moving groove 322, and the side wall of the moving groove 322 has multiple positioning holes 323 that communicate with it. The top of the telescopic cylinder 321 is slidably connected to a telescopic rod 324. One end of the telescopic rod 324 extends into the inside of the telescopic cylinder 321 and is fitted with a driving L-shaped component 325. The vertical end of the driving L-shaped component 325 extends out of one of the positioning holes 323. An expansion spring 326 is installed inside the telescopic cylinder 321 and is tightly attached to the bottom of the driving L-shaped component 325.

[0064] It should be noted that when the position of the spray shell plate 33 needs to be adjusted, an external force can be applied to the telescopic rod 324 to move the telescopic rod 324 inside the telescopic cylinder 321, driving the L-shaped part 325 to move together with the telescopic rod 324. During the movement, the vertical end of the driving L-shaped part 325 can extend from one positioning hole 323 to another positioning hole 323.

[0065] When the vertical end of the driving L-shaped component 325 extends into a certain positioning hole 323, the expansion spring 326 is pressed tightly against the underside of the driving L-shaped component 325, providing a certain supporting force to keep the telescopic rod 324 stable in that position. By selecting different positioning holes 323, the telescopic rod 324 can be fixed in different positions inside the telescopic cylinder 321, thereby adjusting the distance between the spray shell plate 33 and the inner wall of the outer shell 13. The design of the telescopic component 32 allows the position of the spray shell plate 33 to be flexibly adjusted according to actual needs, improving the adaptability and flexibility of the equipment.

[0066] The working principle of this invention is as follows: When it is necessary to clean the impeller 14 and the inner wall of the outer casing 13, the spray wheel assembly 2 is started, the electric push rod 24 pushes the push plate, drives the drive rod 23 to move, so that the moving seat 21 and the L-shaped part 22 move, thereby driving the side shell 15 and the bottom shell 16 to move quickly off the outer casing 13. At this time, the impeller 14 moves synchronously.

[0067] The removal of the side shell 15 and bottom shell 16 exposes the impeller 14 to the spray area. At the same time, the arc-shaped hole on the bottom wall of the outer shell 13 can quickly discharge the impurities accumulated on the inner wall of the outer shell 13. The limiting cylinder 18 extends from the limiting rod 17. The spray rod 25 located on the inner side of the limiting rod 17 above the side shell 15 rotates downward due to gravity. The first spray gun head 26 is engaged in the three opening slots below the spray rod 25 and is arranged in different directions. The first spray gun head 26 in the middle opening slot is arranged along the vertical plane of the impeller 14. The first spray gun head 26 in the rear opening slot is arranged towards the left side wall of the impeller 14. The first spray gun head 26 in the front opening slot is arranged towards the right side wall of the impeller 14.

[0068] The air compressor and motor are started. The motor drives the impeller 14 to rotate slowly. The first spray gun head 26 sprays and cleans the surface of the impeller 14, achieving full coverage of the impeller 14 surface.

[0069] After the air compressor starts, gas is ejected from the third spray nozzle 223 and flows along the arc-shaped surface of the bottom shell 16. The arc-shaped structure of the bottom shell 16 guides the gas flow, enhances gas fluidity, and more effectively sprays and cleans impurities on the bottom shell 16.

[0070] When the plug rod 31 is inserted into the plug tube 311, the limiting block 314 slides along the limiting groove 315 and is locked into the locking groove 316. The spring plate 313 is tightly attached to the side wall of the plug rod 31, so as to realize the fixed connection between the plug rod 31 and the plug tube 311. When disassembly is required, the limiting block 314 can be moved out of the locking groove 316 by external force.

[0071] When it is necessary to adjust the position of the spray shell plate 33, an external force is applied to the telescopic rod 324, causing the vertical end of the driving L-shaped part 325 to extend from one positioning hole 323 to another positioning hole 323. The expansion spring 326 is tightly attached to the underside of the driving L-shaped part 325 to provide support force, thereby fixing the telescopic rod 324 in different positions inside the telescopic cylinder 321, thereby adjusting the distance between the spray shell plate 33 and the inner wall of the outer shell 13.

[0072] As the impeller 14 rotates slowly, the plug rod 31 and the spray plate 33 also rotate. The fourth spray head 34 sprays along the periphery of the outer shell 13, and the fifth spray head 35 sprays in the direction of the side wall of the outer shell 13. The two work together to fully cover the inner side wall of the outer shell 13, causing the impurities inside the outer shell 13 to be loosened by the impact force and discharged along the arc-shaped hole.

[0073] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A centrifugal multi-blade fan, comprising a base (1), characterized in that; A support base (12) is installed on one side of the top of the base (1), and a housing (13) is installed on the other side of the top of the base (1). An impeller (14) is provided on one side of the housing (13), and a motor for driving the impeller (14) to rotate is provided on the support base (12). The outer casing (13) has a circular hole on its side wall for extending the impeller (14) outside the outer casing (13). A side shell (15) is provided on one side of the outer casing (13), and the side shell (15) is adapted to the circular hole. The bottom wall of the outer shell (13) is provided with an arc-shaped hole, which is used to quickly discharge the impurities accumulated on the inner wall of the outer shell (13). A bottom shell (16) is provided on one side of the outer shell (13), and the cross-section of the bottom shell (16) is L-shaped. Two limiting rods (17) are installed on the outer shell (13), and a limiting cylinder (18) is installed on one side of the side shell (15) corresponding to the two limiting rods (17). The limiting rods (17) are slidably connected inside the limiting cylinder (18). The spray wheel assembly (2), which is disposed above the support base (12), is used to synchronously spray accumulated impurities on the surface of the impeller (14) and the inner wall of the bottom shell (16). The spray wheel assembly (2) includes a movable base (21) connected to the top surface of the support base (12) by means of a slide rail. The motor is mounted on the movable base (21) by means of a motor mount. The right side of the movable base (21) is fixedly connected to the side shell (15). An L-shaped piece (22) is connected to the side wall of the support base (12) by means of a slide rail. The end of the L-shaped piece (22) away from the support base (12) is fixedly connected to the end of the bottom shell (16) away from the outer shell (13). The left side of the support base (12) is slidably connected to the movable base (21) and the L-shaped piece (22) respectively. Two drive rods (23) are fixedly connected. An electric push rod (24) is installed on the left side of the support base (12). The moving end of the electric push rod (24) is snapped with a push plate fixedly connected to the two drive rods (23). One of the limiting rods (17) is arranged directly above the side shell (15) and has a semi-arc shape. The inner side of the limiting rod (17) above the side shell (15) is rotatably connected to a spray rod (25). Three opening slots are evenly opened below the spray rod (25). The first spray gun head (26) is snapped into each of the three opening slots. When the side shell (15) is away from the outer shell (13), the spray rod (25) can extend out of the limiting cylinder (18) and rotate on the side wall of the impeller (14) in an inclined arrangement. The top surface of the spray rod (25) and the inner arc surface of the limiting rod (17) are provided with a repulsive magnetic material. When the limiting rod (17) extends out from the inside of the limiting cylinder (18), the magnetic material drives the spray rod (25) to rotate relative to the limiting rod (17). The spray shell assembly (3) is located inside the outer shell (13) and is used to spray impurities adhering to the inner wall of the outer shell (13). The spray shell assembly (3) includes a plug rod (31) located in the middle of the impeller (14). A telescopic assembly (32) is provided above the plug rod (31). An arc-shaped spray shell plate (33) is provided at one end of the telescopic assembly (32) away from the plug rod (31). A fourth spray gun head (34) in a rectangular array is snapped onto the top surface of the spray shell plate (33). The front and rear ends of the spray shell plate (33) are set as inclined surfaces, and a fifth spray gun head (35) is snapped onto the inclined surface.

2. A centrifugal multi-blade fan according to claim 1, characterized in that; The first spray gun head (26) located in the middle opening slot is arranged along the vertical plane of the impeller (14). The first spray gun head (26) located in the rear opening slot is arranged towards the left side wall of the impeller (14), and the first spray gun head (26) located in the front opening slot is arranged towards the right side wall of the impeller (14).

3. A centrifugal multi-blade fan according to claim 1, characterized in that; A slide groove (211) is provided below the spray bar (25) and between the spaced opening slots. A support arc plate (212) is installed below the limiting rod (17) at the top of the side shell (15). A roller (213) is rotatably connected to one side of the support arc plate (212) corresponding to the slide groove (211). The roller (213) slides on the slide groove (211).

4. A centrifugal multi-blade fan according to claim 2, characterized in that; When the impeller (14) extends out of the outer casing (13), there is a space between its side wall and the outer casing (13). Another limiting rod (17) is provided with a groove (221) near one end of the outer casing (13) and on the side near the impeller (14). Multiple second spray gun heads (222) are snapped onto the side of the groove (221).

5. A centrifugal multi-blade fan according to claim 4, characterized in that; Another limiting rod (17) is equipped with a third spray gun head (223) on one side near the bottom shell (16). There is at least one third spray gun head (223), and the spray direction of the third spray gun head (223) is bent along the arc surface of the bottom shell (16).

6. A centrifugal multi-blade fan according to claim 4, characterized in that; A plug-in cylinder (311) is installed in the middle of the impeller (14). A rotating groove (312) is opened in the plug-in cylinder (311). A spring plate (313) is installed inside the plug-in cylinder (311). A symmetrically arranged limiting block (314) is installed at one end of the plug-in rod (31) near the plug-in cylinder (311). A limiting groove (315) adapted to the limiting block (314) is opened on the inner side wall of the plug-in cylinder (311). A locking groove (316) arranged perpendicular to the side shell (15) is opened at one end of the rotating groove (312) away from the spring plate (313). When the plug-in rod (31) is fixed inside the plug-in cylinder (311), the limiting block (314) is arranged inside the locking groove (316), and the spring plate (313) is tightly attached to the side wall of the plug-in rod (31).

7. A centrifugal multi-blade fan according to claim 1, characterized in that; The telescopic assembly (32) includes a telescopic cylinder (321) that is snapped onto the top of the plug rod (31). The inner side wall of the telescopic cylinder (321) is provided with a moving groove (322). The side wall of the moving groove (322) is provided with a plurality of positioning holes (323) that communicate with it. The top of the telescopic cylinder (321) is slidably connected to a telescopic rod (324). One end of the telescopic rod (324) extends into the inside of the telescopic cylinder (321) and is fitted with a driving L-shaped component (325). The end of the driving L-shaped component (325) away from the telescopic rod (324) extends out into one of the positioning holes (323). An expansion spring (326) is installed on the inside of the telescopic cylinder (321). The expansion spring (326) is close to the driving L-shaped component (325) below it.

Images