Centrifugal multi-blade fan

Abstract

The invention relates to the field of fan ventilation machinery production, in particular to a centrifugal multi-blade fan which comprises a base, a supporting seat is mounted on one side of the top of the base, and a shell is mounted on the other side of the top of the base. The impeller can be exposed on the spraying wheel assembly to facilitate later rapid spraying, meanwhile, the bottom shell is moved out of the shell, impurities gathered at the bottom of the shell are rapidly cleaned, the spraying efficiency is improved, the spraying wheel assembly can conduct synchronous spraying cleaning on the impurities gathered on the surface of the impeller and the inner wall of the bottom shell, and the cleaning efficiency is improved. And meanwhile, due to the separable design of the side shell, the bottom shell and the outer shell and the rotatable and extending structure of the spraying rod, cleaning operation is more convenient and flexible, the impeller can be exposed in a spraying area according to needs, cleaning pertinence and operability are improved, and automatic cleaning operation is achieved.

Description

Technical Field

[0001] The invention relates to the field of fan ventilation machinery production, in particular to a centrifugal multi-blade fan. Background Art

[0002] A centrifugal multi-blade fan is a device that generates centrifugal force through the rotation of the impeller, so that the air gains energy and is discharged. It is usually composed of an impeller, a casing, a motor and other parts. In some industrial production processes, such as mining, metallurgy, building materials and other industries, a large amount of dust will be generated. The powerful airflow generated by the centrifugal multi-blade fan is needed to suck the dust-containing air into the dust collector for purification, reduce the harm of dust to the environment and human body, and thus provide a comfortable and safe environment for people's production and life.

[0003] The existing use of a centrifugal multi-blade fan has certain defects: during the operation of the centrifugal multi-blade fan, air is constantly inhaled and discharged, and the air may contain impurities such as dust, particles, fibers, etc., which will be carried to the impeller surface with the air flow. Since the impeller and the casing are usually fixedly connected, it is difficult to clean a specific part separately. The existing solution is to disassemble the casing at a local position and then clean it along multiple angles of the impeller, which is cumbersome, time-consuming and labor-intensive. Secondly, impurities in the air driven by the impeller will diffuse outward under the action of centrifugal force, but due to the influence of gravity, some heavier impurities will gradually settle to the bottom of the casing, especially when the fan has been running for a period of time, the accumulation of impurities will increase. The existing manual use of a vacuum cleaner to clean the bottom of the casing is time-consuming and labor-intensive, and the cleaning efficiency is low.

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

[0005] In view of the deficiencies in the prior art, the present invention provides a centrifugal multi-blade fan, which solves the technical problem of low cleaning efficiency of impurities on the impeller surface and impurities on the bottom of the casing.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: The technical solution adopted by the present invention to solve the technical problem is: a centrifugal multi-blade fan, comprising a base, a support base is installed on one side of the top of the base, a shell is installed on the other side of the top of the base, an impeller is arranged on one side of the shell, and a motor for driving the impeller to rotate is arranged on the support base; A circular hole is formed on the side wall of the shell, and the circular hole is used to extend the impeller out of the shell. A side shell is provided on one side of the shell, and the side shell is adapted to the circular hole. The bottom wall of the shell is provided with an arc-shaped hole, and the arc-shaped hole is used to quickly discharge impurities accumulated on the inner wall of the shell. A bottom shell is provided on one side of the shell, and the cross section of the bottom shell is an L-shaped structure; 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, and the limiting rod is slidably connected inside the limiting cylinder; A spray wheel assembly is arranged above the support seat and is used for synchronously spraying the accumulated impurities on the impeller surface and the inner wall of the bottom shell; The shell spraying assembly is arranged inside the shell and is used for spraying impurities adhered to the inner wall of the shell.

[0007] Preferably, the spray wheel assembly includes a support seat connected to the top surface of the support seat by a slide rail cooperation manner, the motor is installed on the movable seat through the motor seat, the right side of the movable seat is fixedly connected to the side shell, the side wall of the L-shaped part is connected to the L-shaped part by a slide rail cooperation manner, the vertical end of the L-shaped part is fixedly connected to the horizontal end of the bottom shell, and the left side of the support seat is slidably connected to two driving rods that are respectively fixedly connected to the moving seat and the L-shaped part, and an electric push rod is installed on the left side of the support seat, and the moving end of the electric push rod is clamped and installed with a push plate fixedly connected to the two driving rods, one of which is arranged directly above the side shell and has a semi-arc shape. The inner side of the limit rod located above the side shell is rotatably connected to the spray rod, and three open grooves are evenly opened below the spray rod, and the first spray gun heads are clamped and installed in the three open grooves. When the side shell is away from the outer shell, the spray rod can extend out from the inside of the limit cylinder and rotate on the side wall of the impeller in an inclined manner.

[0008] Preferably, the first spray gun head located in the middle opening groove is arranged along the vertical plane of the impeller, the first spray gun head located in the rear end opening groove is arranged toward the left end side wall of the impeller, and the first spray gun head located in the front end opening groove is arranged toward the right end side wall of the impeller.

[0009] Preferably, a slide groove is provided below the spray rod and between the spaced open grooves, and a supporting arc plate is installed below the limiting rod located at the top of the side shell. A roller is rotatably connected to one side of the supporting arc plate corresponding to the slide groove, and the roller is slidably connected along the slide groove.

[0010] Preferably, the top surface of the spray rod and the inner arc surface of the limit rod are provided with repulsive magnetic materials, and the limit cylinder can drive the spray rod to rotate stably along the limit rod through the repulsive force of the magnetic material when the limit rod is extended.

[0011] Preferably, when the impeller extends out of the casing, a space is left between its side wall and the casing, and another limiting rod is provided with an inclined groove near one end of the casing and on a side near the impeller, and a plurality of second spray gun heads are clamped and installed on the side portion of the inclined groove, and the plurality of second spray gun heads are arranged in the space in an inclined manner.

[0012] Preferably, a third spray gun head is installed on a side of the other limiting rod close to the bottom shell, and there is at least one third spray gun head, which are arranged in a staggered manner, and the spraying direction of the third spray gun head is bent along the arc surface direction of the bottom shell.

[0013] Preferably, the shell spray assembly includes a plug-in rod arranged in the middle of the impeller, a telescopic assembly is arranged above the plug-in rod, an arc-shaped shell spray plate is arranged at one end of the telescopic assembly away from the plug-in rod, a fourth spray gun head in a rectangular array is clamped and installed on the top surface of the shell spray plate, and the front and rear ends of the shell spray plate are arranged as inclined surfaces, and a fifth spray gun head is clamped and installed on the inclined surface.

[0014] Preferably, a plug-in cylinder is installed in the middle part of the impeller, a rotation groove is provided in the plug-in cylinder, a spring plate is installed inside the plug-in cylinder, a symmetrically arranged limit block is installed at one end of the plug-in rod close to the plug-in cylinder, a limit groove matched with the limit block is provided on the inner side wall of the plug-in cylinder, and a lock groove arranged perpendicular to the side shell is provided at one end of the rotation groove away from the spring plate; when the plug-in rod is fixed inside the plug-in cylinder, the limit block is arranged inside the lock groove, and the spring plate is tightly attached to the side wall of the plug-in rod.

[0015] Preferably, the telescopic assembly includes a telescopic cylinder which is snap-fitted above the plug-in rod, a movable groove is provided on the inner side wall of the telescopic cylinder, a plurality of positioning holes connected thereto are provided on the side wall of the movable groove, 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 provided with a driving L-shaped piece, a vertical end of the driving L-shaped piece extends out of one of the positioning holes, an expansion spring is provided on the inner side of the telescopic cylinder, and the expansion spring is tightly attached to the bottom of the driving L-shaped piece.

[0016] Beneficial effects: (1) The present invention sets a spray wheel assembly to drive the side shell and the bottom shell to separate from the outer shell, so that the impeller can enter the injection area. The purpose is to expose the impeller on the spray wheel assembly, which is convenient for rapid injection in the later stage. At the same time, the bottom shell is also moved out from the inside of the outer shell. The purpose is to quickly clean the impurities accumulated at the bottom of the outer shell and improve the injection efficiency. The spray wheel assembly can synchronously spray and clean the accumulated impurities on the impeller surface and the inner wall of the bottom shell, thereby improving the cleaning efficiency. At the same time, the separable design of the side shell, the bottom shell and the outer shell, as well as the rotatable and extendable structure of the spray rod, make the cleaning operation more convenient and flexible. The impeller can be exposed to the injection area as needed, which improves the pertinence and operability of the cleaning, realizes the automated cleaning operation, reduces manual intervention, improves work efficiency, and at the same time, reduces the labor intensity and safety risks of manual cleaning.

[0017] (2) The present invention sets a shell spraying assembly, and the fourth spray gun head sprays along the edge around the shell, and the fifth spray gun head sprays in the direction of the shell side wall. 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 can be cleaned to avoid impurities. The present invention cooperates with the plug-in barrel, the rotating groove, the spring plate and the limit block. When the shell spraying assembly needs to be installed, it is only necessary to insert the plug-in rod into the plug-in barrel, so that the limit block slides along the limit groove and is stuck in the lock 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. The present invention also sets a design of a telescopic assembly, so that the position of the shell spraying plate can be flexibly adjusted according to actual needs, thereby improving the adaptability and flexibility of the equipment.

[0018] (3) The present invention also provides three first spray gun heads arranged in different directions to cooperate with each other, so as to achieve full coverage of the impeller surface. Whether it is the front, side or junction of the impeller with the outer casing, it can be effectively cleaned, avoiding the residue of impurities on the impeller surface and ensuring the cleanliness of the impeller. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall structure of the present invention from another angle; Figure 3 It is a schematic diagram of the spray wheel assembly of the present invention; Figure 4 It is a partial cross-sectional view of the limiting rod of the present invention; Figure 5 for Figure 3 A partial enlarged view of middle A; Figure 6 It is a schematic diagram of the second spray gun head and the third spray gun head of the present invention; Figure 7 It is a schematic diagram of the spray shell assembly of the present invention; Figure 8 It is a cross-sectional view of the plug-in sleeve of the present invention; Fig. 9 It is a schematic diagram of the telescopic assembly of the present invention.

[0021] In the figure: 1, base; 12, support seat; 13, housing; 14, impeller; 15, side housing; 16, bottom housing; 17, limit rod; 18, limit cylinder; Spray wheel assembly; 21, moving seat; 22, L-shaped piece; 23, driving rod; 24, electric push rod; 25, spray rod; 26, first spray gun head; 211, slide groove; 212, supporting arc plate; 213, roller; 221, inclined groove; 222, second spray gun head; 223, third spray gun head; spray shell assembly; 31, plug-in rod; 32, telescopic assembly; 33, spray shell plate; 34, fourth spray gun head; 35, fifth spray gun head; 311, plug-in cylinder; 312, rotating 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, driving L-shaped piece; 326, expansion spring. DETAILED DESCRIPTION In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0022] like Figure 1-Figure 2 As shown, a centrifugal multi-blade fan includes a base 1, a support base 12 is installed on one side of the top of the base 1, a shell 13 is installed on the other side of the top of the base 1, an impeller 14 is arranged on one side of the shell 13, a motor for driving the impeller 14 to rotate is arranged on the support base 12, a circular hole is opened on the side wall of the shell 13, the circular hole is used to extend the impeller 14 outside the shell 13, a side shell 15 is arranged on one side of the shell 13, the side shell 15 is adapted to the circular hole, and an arc hole is opened on the bottom wall of the shell 13, and the arc hole is used to gather the inner wall of the shell 13 In order to quickly discharge impurities, a bottom shell 16 is provided on one side of the outer shell 13, and the cross-section of the bottom shell 16 is an L-shaped structure. Two limit rods 17 are installed on the outer shell 13, and a limit cylinder 18 is installed on one side of the side shell 15 corresponding to the two limit rods 17. The limit rod 17 is slidably connected inside the limit cylinder 18. The spray wheel assembly 2 is arranged above the support seat 12, and is used for synchronously spraying 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 arranged inside the outer shell 13, and is used for spraying impurities adhered to the inner wall of the outer shell 13.

[0023] When it is necessary to clean impurities on the surface of the impeller 14 and the inner wall of the outer shell 13, the side shell 15 and the bottom shell 16 are driven to separate from the outer shell 13 through the spray wheel assembly 2, so that the impeller 14 can enter the injection area. The purpose is to expose the impeller 14 on the spray wheel assembly 2 to facilitate rapid injection later. At the same time, the bottom shell 16 is also removed from the inside of the outer shell 13. The purpose is to quickly clean the impurities accumulated at the bottom of the outer shell 13 and improve the injection efficiency.

[0024] like Figure 1-Figure 4 As shown, the spray wheel assembly 2 includes a support seat 12 connected to the top surface of the support seat 12 by means of a slide rail, the motor is installed on the movable seat 21 through the motor seat, the right side of the movable seat 21 is fixedly connected to the side shell 15, the side wall of the L-shaped member 22 is connected to the L-shaped member 22 by means of a slide rail, the vertical end of the L-shaped member 22 is fixedly connected to the horizontal end of the bottom shell 16, the left side of the support seat 12 is slidably connected to two driving rods 23 fixedly connected to the movable seat 21 and the L-shaped member 22 respectively, an electric push rod 24 is installed on the left side of the support seat 12, and the moving end of the electric push rod 24 is clamped with a push plate fixedly connected to the two driving rods 23 One of the limit rods 17 is arranged just above the side shell 15 and has a semi-arc shape. The limit rod 17 located above the side shell 15 is rotatably connected to the inner side of the limit rod 17, and three open grooves are evenly opened below the spray rod 25. The first spray gun head 26 is clamped and installed in the three open grooves. An air compressor is installed on the front side of the support seat 12. The output end of the air compressor passes through the inside of the limit cylinder 18 through the injection pipe. The injection 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 from the inside of the limit cylinder 18 and rotate on the side wall of the impeller 14 to be arranged in an inclined manner.

[0025] It should be noted that the electric push rod 24 drives the driving rod 23 to move through the push plate, and the moving seat 21 and the L-shaped member 22 move accordingly, thereby driving the side shell 15 and the bottom shell 16 to move out of the outer shell 13 quickly. The arc-shaped hole opened on the bottom wall of the outer shell 13 can quickly discharge the impurities gathered on the inner wall of the outer shell 13. The limit cylinder 18 extends from the limit rod 17. The spray rod 25 on the limit rod 17 rotates downward due to the action of gravity, so that the spray rod 25 is arranged on the impeller 14 in an inclined manner and aligned. The air compressor and the 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, the impurities are removed through the surface of the bottom shell 16, thereby improving the spraying efficiency. 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, thereby improving the cleaning efficiency. At the same time, the design that the side shell 15, the bottom shell 16 and the outer shell 13 can be separated, and the rotatable and extendable structure of the spray rod 25 make the cleaning operation more convenient and flexible. The impeller 14 can be exposed to the spraying area as needed, thereby improving the pertinence and operability of the cleaning, realizing the automated cleaning operation, reducing manual intervention, improving work efficiency, and at the same time, reducing the labor intensity and safety risks of manual cleaning; It is worth noting that the front and rear ends of the bottom shell 16 are pointed structures, which facilitate the limiting effect with the outer shell 13, and the edge of the tip is provided with a sealing gasket to improve the sealing effect of the outer shell 13.

[0026] like Figure 3-Figure 5 As shown, the first spray gun head 26 located in the middle opening groove is arranged along the vertical plane of the impeller 14, the first spray gun head 26 located in the rear end opening groove is arranged toward the left end side wall of the impeller 14, and the first spray gun head 26 located in the front end opening groove is arranged toward the right end side wall of the impeller 14.

[0027] It should be noted that when the centrifugal multi-blade fan is cleaning impurities, the first spray gun heads 26 located at different positions of the spray rod 25 have specific layout directions. The first spray gun heads 26 in the middle opening groove are arranged along the vertical surface of the impeller 14, and can directly spray the front of the impeller 14. The first spray gun heads 26 in the rear opening groove are arranged toward the left side wall of the impeller 14, and can be targeted to spray the left side of the impeller 14. The first spray gun heads 26 in the front opening groove are arranged toward the right side wall of the impeller 14, and similarly, the right side of the impeller 14 is sprayed. The first spray gun heads 26 arranged in three different directions cooperate with each other to achieve comprehensive coverage of the surface of the impeller 14. Whether it is the front, side or junction of the impeller 14 with the casing 13, they can all be effectively cleaned, avoiding the residue of impurities on the surface of the impeller 14 and ensuring the cleanliness of the impeller 14.

[0028] like Figure 3-Figure 4 As shown, a slide groove 211 is provided below the spray rod 25 and between the spaced open grooves, and a supporting arc plate 212 is installed below the limiting rod 17 located at the top of the side shell 15. The supporting arc plate 212 is rotatably connected to one side of the slide groove 211 with a roller 213, and the roller 213 is slidably connected along the slide groove 211.

[0029] It should be noted that when the side shell 15 moves, the limiting cylinder 18 extends outward from the limiting rod 17. In this process, the supporting arc plate 212 moves together with the limiting rod 17, and the roller 213 on the supporting arc plate 212 slides on the slide groove 211. The sliding of the roller 213 on the slide groove 211 plays a role of limiting and guiding, ensuring the relative position of the spray rod 25 during the movement of the side shell 15 is stable, and at the same time ensuring that the moving direction of the spray rod 25 is consistent with the moving direction of the side shell 15, which can effectively prevent the spray rod 25 from shaking or deflecting. Ensure that the spray rod 25 is always in the correct position so that the impeller 14 can be accurately sprayed and cleaned when necessary; It is worth noting that the present invention, through the sliding cooperation between the limiting cylinder 18 and the limiting rod 17, can firstly limit the side shell 15, and secondly protect the first spray gun head 26 inside the spray rod 25.

[0030] The top surface of the spray rod 25 and the inner arc surface of the limiting rod 17 are provided with repulsive magnetic materials. 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 materials.

[0031] It should be noted that when the impeller 14 extends out of the casing 13, a space is left between its side wall and the casing 13, and another limiting rod 17 is close to one end of the casing 13 and is located on a side close to the impeller 14, and an inclined groove 221 is provided. A plurality of second spray gun heads 222 are clamped and installed on the side portion of the inclined groove 221, and the plurality of second spray gun heads 222 are arranged in the space in an inclined manner.

[0032] When the device does not need to spray, the magnetic materials on the top surface of the spray rod 25 and the inner arc surface of the limit rod 17 repel each other, so that the spray rod 25 remains stable inside the limit rod 17. This stabilization 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, etc.; When the limiting cylinder 18 is extended 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 spraying position, ensuring that the first spray gun head 26 can be aligned with the impeller 14 to effectively clean impurities.

[0033] like Figure 2 and Figure 6 As shown, a third spray gun head 223 is installed on one side of another limiting rod 17 close to the bottom shell 16, and the output end of the air compressor passes through the inside of the limiting cylinder 18 through the injection pipe and is fixedly connected thereto. There is at least one third spray gun head 223, and they are arranged in a staggered manner. The injection direction of the third spray gun head 223 is bent along the arc surface direction of the bottom shell 16.

[0034] It should be noted that after the air compressor is started, the compressed gas passes through the interior of the limiting cylinder 18 through the injection pipe and is delivered to the third spray gun head 223. Since the injection direction of the third spray gun head 223 is bent along the arc surface direction of the bottom shell 16, when the gas is ejected from the third spray gun head 223, it will flow along the arc surface of the bottom shell 16, and the bottom shell 16 is 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 being able to spray and clean the impurities on the bottom shell 16 more concentratedly; It is worth noting that the third spray gun head 223 is arranged at the highest end of the bottom shell 16 so that the third spray gun head 223 can have a comprehensive spraying effect on the entire curved surface of the bottom shell 16 .

[0035] like Figure 2 and Figure 7 As shown, the spray shell assembly 3 includes a plug-in rod 31 arranged in the middle of the impeller 14, a telescopic assembly 32 is arranged above the plug-in rod 31, and an arc-shaped spray shell plate 33 is arranged at one end of the telescopic assembly 32 away from the plug-in rod 31. The top surface of the spray shell plate 33 is clamped and installed with a fourth spray gun head 34 in a rectangular array, and the front and rear ends of the spray shell plate 33 are set as inclined surfaces, and the fifth spray gun head 35 is clamped and installed on the inclined surface, and the output ends of the air compressor pass through the spray shell plate 33 through the injection pipe and are fixedly connected with the fourth spray gun head 34 and the fifth spray gun head 35.

[0036] It should be noted that when the impeller 14 rotates slowly, since the impeller 14 is connected to the plug rod 31, the plug rod 31 and the shell spraying plate 33 also rotate accordingly, and the fourth spray gun head 34 on the shell spraying plate 33 can spray along the peripheral edge of the shell 13. The fourth spray gun heads 34 are distributed in a rectangular array, which can clean the peripheral edge of the shell 13 more evenly. At the same time, the fifth spray gun head 35 can spray in the direction of the side wall of the shell 13. The fifth spray gun head 35 is located on the inclined surface at the front and rear ends of the shell spraying plate 33, which can better align the side wall of the shell 13 for spraying. The spraying of the fourth spray gun head 34 and the fifth spray gun head 35 causes the impurities inside the shell 13 to be loosened by the impact force. Since the bottom wall of the shell 13 is provided with an arc hole, the impurities can be discharged along the arc hole under the spraying action of the spray gun head; The present invention uses the fourth spray gun head 34 to spray along the peripheral edge of the shell 13, and the fifth spray gun head 35 to spray in the direction of the side wall of the shell 13. The combination of the two can fully cover the inner wall of the shell 13, ensuring that all parts of the inner wall of the shell 13 can be cleaned to avoid impurities remaining.

[0037] like Figure 7 and Figure 8As shown, a plug-in cylinder 311 is installed in the middle of the impeller 14, a rotation groove 312 is opened in the plug-in cylinder 311, a spring plate 313 is installed inside the plug-in cylinder 311, and a symmetrically arranged limit block 314 is installed at one end of the plug-in rod 31 close to the plug-in cylinder 311, and a limit groove 315 matched with the limit block 314 is opened on the inner side wall of the plug-in cylinder 311, and a locking groove 316 arranged perpendicular to the side shell 15 is opened at one end of the rotation groove 312 away from the spring plate 313. When the plug-in rod 31 is fixed inside the plug-in cylinder 311, the limit 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.

[0038] When the bolt 31 is in the unlocking state, the spring plate 313 is pressed against the locking groove 316 to lock the locking groove 314, thereby the bolt 31 is locked in the unlocking state.

[0039] like Figure 7 and Fig. 9 As shown, the telescopic assembly 32 includes a telescopic cylinder 321 which is snap-fitted onto the top of the plug-in rod 31, a movable groove 322 is provided on the inner wall of the telescopic cylinder 321, and a plurality of positioning holes 323 which are connected thereto are provided on the side wall of the movable groove 322, a telescopic rod 324 is slidably connected to the top of the telescopic cylinder 321, one end of the telescopic rod 324 extends into the inner side of the telescopic cylinder 321 and is provided with a driving L-shaped member 325, a vertical end of the driving L-shaped member 325 extends out of one of the positioning holes 323, an expansion spring 326 is provided on the inner side of the telescopic cylinder 321, and the expansion spring 326 is tightly attached to the bottom of the driving L-shaped member 325.

[0040] It should be noted that when the position of the shell spraying plate 33 needs to be adjusted, an external force can be applied to the telescopic rod 324 to move the telescopic rod 324 in the telescopic cylinder 321, driving the L-shaped member 325 to move along with the telescopic rod 324. During the movement, the vertical end of the driving L-shaped member 325 can extend from one positioning hole 323 to another positioning hole 323.

[0041] When the vertical end of the driving L-shaped member 325 extends out of a certain positioning hole 323, the expansion spring 326 is tightly attached to the bottom of the driving L-shaped member 325, providing a certain supporting force to keep the telescopic rod 324 stable in this position. By selecting different positioning holes 323, the telescopic rod 324 can be fixed at different positions in the telescopic cylinder 321, thereby adjusting the distance between the shell spraying plate 33 and the inner wall of the shell 13. The design of the telescopic assembly 32 allows the position of the shell spraying plate 33 to be flexibly adjusted according to actual needs, thereby improving the adaptability and flexibility of the equipment.

[0042] The working principle of the present invention is: when it is necessary to clean the impeller 14 and the inner wall of the housing 13, the spray wheel assembly 2 is started, the electric push rod 24 pushes the push plate, drives the driving rod 23 to move, moves the moving seat 21 and the L-shaped member 22, and then drives the side shell 15 and the bottom shell 16 to move out of the housing 13 quickly, and the impeller 14 moves synchronously at this time; The removal of the side shell 15 and the bottom shell 16 exposes the impeller 14 to the spraying area. At the same time, the arc-shaped hole on the bottom wall of the shell 13 can quickly discharge the impurities gathered on the inner wall of the 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 three open grooves below the spray rod 25 are clamped with the first spray gun head 26, which are arranged in different directions. The first spray gun head 26 in the middle open groove is arranged along the vertical surface of the impeller 14, the first spray gun head 26 in the rear end open groove is arranged toward the left end side wall of the impeller 14, and the first spray gun head 26 in the front end open groove is arranged toward the right end side wall of the impeller 14. The air compressor and the motor are started, the motor drives the impeller 14 to rotate slowly, and the first spray gun head 26 sprays and cleans the surface of the impeller 14 to achieve full coverage of the surface of the impeller 14; After the air compressor is started, the gas is ejected from the third spray gun head 223 and flows along the arc surface of the bottom shell 16. The arc structure of the bottom shell 16 guides the gas, enhances the gas flowability, and sprays and cleans the impurities on the bottom shell 16 more concentratedly. When the plug rod 31 is inserted into the plug barrel 311, the limit block 314 slides along the limit groove 315 and is locked into the lock groove 316, and the spring plate 313 is tightly attached to the side wall of the plug rod 31, so that the plug rod 31 and the plug barrel 311 are fixedly connected. When disassembly is required, the limit block 314 can be moved out of the lock groove 316 by external force; When the position of the shell spray plate 33 needs to be adjusted, an external force is applied to the telescopic rod 324, so that the vertical end of the driving L-shaped member 325 extends from one positioning hole 323 to another positioning hole 323, and the expansion spring 326 is tightly attached to the bottom of the driving L-shaped member 325 to provide a supporting force, so that the telescopic rod 324 can be fixed at different positions in the telescopic cylinder 321, thereby adjusting the distance between the shell spray plate 33 and the inner wall of the housing 13; When the impeller 14 rotates slowly, the plug-in rod 31 and the shell spray plate 33 also rotate accordingly, the fourth spray gun head 34 sprays along the peripheral edge of the shell 13, and the fifth spray gun head 35 sprays in the direction of the side wall of the shell 13. The combination of the two fully covers the inner wall of the shell 13, causing the impurities inside the shell 13 to loosen due to the impact force and be discharged along the arc hole.

[0043] The above shows and describes 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 above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A centrifugal multi-blade fan, comprising a base (1), characterized in that: A support seat (12) is installed on one side of the top of the base (1), a housing (13) is installed on the other side of the top of the base (1), an impeller (14) is arranged on one side of the housing (13), and a motor for driving the impeller (14) to rotate is arranged on the support seat (12); A circular hole is formed on the side wall of the outer shell (13), and the circular hole is used to extend the impeller (14) outside the outer shell (13). A side shell (15) is provided on one side of the outer shell (13), and the side shell (15) is adapted to fit the circular hole. The bottom wall of the outer shell (13) is provided with an arc-shaped hole, and the arc-shaped hole is used to quickly discharge 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 an L-shaped structure; Two limiting rods (17) are mounted on the outer shell (13); a limiting cylinder (18) is mounted on one side of the side shell (15) corresponding to the two limiting rods (17); the limiting rods (17) are slidably connected to the inner side of the limiting cylinder (18); A spray wheel assembly (2), which is arranged above the support seat (12) and is used for synchronously spraying the accumulated impurities on the surface of the impeller (14) and the inner wall of the bottom shell (16); The shell spraying assembly (3) is arranged inside the shell (13) and is used to spray impurities adhered to the inner wall of the shell (13).

2. A centrifugal multi-blade fan according to claim 1, characterized in that; The spray wheel assembly (2) comprises a support seat (12) connected to the top surface of the support seat (12) by means of a slide rail, the motor is mounted on the moving seat (21) by means of a motor seat, the right side of the moving seat (21) is fixedly connected to the side shell (15), the side wall of the L-shaped member (22) is connected to the L-shaped member (22) by means of a slide rail, the vertical end of the L-shaped member (22) is fixedly connected to the horizontal end of the bottom shell (16), the left side of the support seat (12) is slidably connected to two driving rods (23) fixedly connected to the moving seat (21) and the L-shaped member (22) respectively, and the left side of the support seat (12) is equipped with an electric push rod ( 24), a push plate fixedly connected to two driving rods (23) is mounted on the movable end of the electric push rod (24), one of the limit rods (17) is arranged directly above the side shell (15) and has a semi-arc-shaped structure, a spray rod (25) is rotatably connected to the inner side of the limit rod (17) located above the side shell (15), three open grooves are evenly arranged below the spray rod (25), and a first spray gun head (26) is mounted in each of the three open grooves, and when the side shell (15) is away from the outer shell (13), the spray rod (25) can extend from the inside of the limit cylinder (18) and rotate on the side wall of the impeller (14) to be arranged in an inclined manner.

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

4. A centrifugal multi-blade fan according to claim 2, characterized in that; A slide groove (211) is provided below the spray rod (25) and between the spaced open grooves. A supporting arc plate (212) is installed below the limiting rod (17) located 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 slide groove (211). The roller (213) is slidably connected along the slide groove (211).

5. A centrifugal multi-blade fan according to claim 4, characterized in that; The top surface of the spray rod (25) and the inner arc surface of the limit rod (17) are provided with repulsive magnetic material, and when the limit rod (17) is extended, the limit cylinder (18) can drive the spray rod (25) to rotate stably along the limit rod (17) through the repulsive force of the magnetic material.

6. A centrifugal multi-blade fan according to claim 3, characterized in that; When the impeller (14) extends out of the housing (13), a space is left between the side wall thereof and the housing (13); an inclined groove (221) is provided at one end of the other limiting rod (17) close to the housing (13) and at a side surface close to the impeller (14); a plurality of second spray gun heads (222) are mounted on the side surface of the inclined groove (221); and the plurality of second spray gun heads (222) are arranged in the space in an inclined manner.

7. A centrifugal multi-blade fan according to claim 6, characterized in that; A third spray gun head (223) is installed on a side surface of the other limiting rod (17) close to the bottom shell (16); there is at least one third spray gun head (223) which is arranged in a staggered manner; and the spraying direction of the third spray gun head (223) is bent along the arc surface direction of the bottom shell (16).

8. A centrifugal multi-blade fan according to claim 1, characterized in that; The shell spray assembly (3) comprises a plug-in rod (31) arranged in the middle of the impeller (14), a telescopic assembly (32) is arranged above the plug-in rod (31), an arc-shaped shell spray plate (33) is arranged at one end of the telescopic assembly (32) away from the plug-in rod (31), a fourth spray gun head (34) in a rectangular array is mounted on the top surface of the shell spray plate (33), and the front and rear ends of the shell spray plate (33) are arranged as inclined surfaces, and a fifth spray gun head (35) is mounted on the inclined surfaces.

9. A centrifugal multi-blade fan according to claim 8, characterized in that; A plug-in cylinder (311) is installed in the middle of the impeller (14), a rotation groove (312) is provided in the plug-in cylinder (311), a spring plate (313) is installed inside the plug-in cylinder (311), a symmetrically arranged limit block (314) is installed at one end of the plug-in rod (31) close to the plug-in cylinder (311), a limit groove (315) matched with the limit block (314) is provided on the inner side wall of the plug-in cylinder (311), a locking groove (316) arranged perpendicularly to the side shell (15) is provided at one end of the rotation groove (312) away from the spring plate (313), and when the plug-in rod (311) is fixed inside the plug-in cylinder (311), the limit 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).

10. A centrifugal multi-blade fan according to claim 9, characterized in that; The telescopic assembly (32) comprises a telescopic cylinder (321) which is snap-fitted and mounted above the plug-in rod (31); a moving groove (322) is provided on the inner side wall of the telescopic cylinder (321); a plurality of positioning holes (323) which are in communication with the moving groove (322) are provided on the side wall of the moving groove (322); a telescopic rod (324) is slidably connected to the top of the telescopic cylinder (321); one end of the telescopic rod (324) extends into the inner side of the telescopic cylinder (321) and is mounted with a driving L-shaped member (325); a vertical end of the driving L-shaped member (325) extends out of one of the positioning holes (323); an expansion spring (326) is mounted on the inner side of the telescopic cylinder (321); the expansion spring (326) is tightly attached to the lower side of the driving L-shaped member (325).

Images