Box type centrifugal fan convenient to repair and maintain

Abstract

The box type centrifugal fan convenient to maintain comprises a main box body, a front through groove is formed in the middle of a front wall plate of the main box body, the bottom face of the front through groove extends to the top face of a bottom plate of the main box body, and the left side and the right side of the front through groove extend to the inner side walls of a left side plate and a right side plate of the main box body. The front cover plate is located in the front through groove and covers the front through groove, the bottom of the front cover plate is movably connected to the front wall face of the bottom plate of the main box body through a plurality of hinges, a plurality of connecting pieces are fixed to the upper portion of the front wall face of the front cover plate, and the connecting pieces are fixedly connected to the upper portion of the front wall face of the main box body through bolts; after the front cover plate or the rear cover plate is opened, parts such as a driving motor in the main box body can be repaired and maintained in the main box body, meanwhile, the horizontal fixing plate can be moved to the front cover plate, the operation space for repairing and maintaining is increased, parts such as a volute on the horizontal fixing plate can be repaired and maintained, the repairing space is greatly increased, operation is convenient, and the working efficiency is improved. Therefore, the overhaul and maintenance efficiency is improved.

Description

Technical fields:

[0001] This utility model relates to the field of fan equipment technology, and more specifically to a box-type centrifugal fan that is easy to maintain and repair. Background technology:

[0002] Currently, in existing box-type centrifugal fans, components such as the volute and drive motor are typically directly fixed inside the box for connection and use.

[0003] When a component is damaged, the entire box-type centrifugal fan and piping must be disassembled to repair internal components such as the drive motor, which is troublesome and inefficient.

[0004] Therefore, in order to solve this problem, existing box-type centrifugal fans have access slots on the front or rear side panels of the casing. Then, a cover is placed on top, and when maintenance is needed, the cover is opened to carry out maintenance. This method is simple and improves the efficiency of maintenance.

[0005] However, when it is necessary to disassemble components such as the volute or maintain components such as the impeller inside the volute of a box-type centrifugal fan, the operation inside the box is cumbersome due to limited space, which increases the difficulty of inspection and maintenance, and the effect is not ideal. Utility model content:

[0006] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a box-type centrifugal fan that is easy to repair and maintain. It can open the front cover or the rear cover to repair and maintain the internal components such as the drive motor inside the main box. At the same time, the horizontal fixing plate can be moved to the front cover to increase the operating space for repair and maintenance, and to repair and maintain the volute and other components thereon. This greatly improves the maintenance space, facilitates operation, and thus improves the efficiency of maintenance.

[0007] The solution of this utility model to the aforementioned technical problem is:

[0008] A box-type centrifugal fan that is easy to maintain and repair includes a main box. A front through groove is formed in the middle of the front wall panel of the main box. The bottom surface of the front through groove extends to the top surface of the bottom plate of the main box. The left and right sides of the front through groove extend to the inner side walls of the left and right side panels of the main box. A front cover plate is located in the front through groove and covers the front through groove. The bottom of the front cover plate is movably connected to the front wall surface of the bottom plate of the main box through multiple hinges. Multiple connecting pieces are fixed to the upper part of the front wall surface of the front cover plate. The connecting pieces are fixed to the upper part of the front wall surface of the main box through bolts.

[0009] The top surface of the bottom plate of the main housing is fixed with multiple front-to-back extending bottom guide rails. The top surface of the bottom guide rails is formed with guide grooves, and the front end of the guide grooves extends out of the front wall of the bottom guide rails. A horizontal fixing plate is located above all the bottom guide rails. Multiple pulleys are installed on the bottom surface of the horizontal fixing plate, and the lower part of the pulleys is inserted into the corresponding guide grooves. The horizontal fixing plate is located in the main housing. Support frames are fixed at the front and rear of the top surface of the horizontal fixing plate. The front and rear side walls of the volute are fixed on the corresponding support frames. A drive motor is fixed on the right side of the top surface of the horizontal fixing plate. A drive wheel is fixed on the output shaft of the drive motor. An impeller is installed in the volute. The two ends of the impeller shaft extend out of the left and right side plates of the volute and are movably connected to the corresponding support frames through bearings. A transmission wheel is fixed on one end of the shaft, and a transmission belt is tensioned on the transmission wheel and the drive wheel.

[0010] The right side panel of the main housing has a right through groove formed in the middle, and the left side panel of the main housing has an air outlet groove formed in the middle.

[0011] On the inner wall of the left side panel of the main housing, there are guide strips extending forward and backward at the positions above and below the air outlet groove, and a rear stop strip is fixed between the rear parts of the two guide strips.

[0012] A forward-extending rear vertical limiting strip is fixed to the right side wall of the rear baffle, and a forward-extending side baffle is fixed to the right side wall of the guide strip. The bottom surface of the upper side baffle extends downward, and the top surface of the lower side baffle extends upward. The air outlet connection at the left end of the volute is inserted between the two guide strips. The left ends of the four outer side walls of the air outlet connection are all formed or fixed with radially extending extension edges. The upper and lower extension edges are located between the corresponding side baffles and the right side wall of the left side plate of the main housing, and the rear extension edge is located between the rear vertical limiting strip and the right side wall of the left side plate of the main housing. The left end of the air outlet connection corresponds to and communicates with the air outlet groove, and the left end face of the air outlet connection is in close contact with the inner wall surface of the left side plate of the main housing.

[0013] The edge material stop strip and the rear vertical limiting strip are formed with multiple connecting screw holes. The screw part of the corresponding fixing bolt is screwed into the corresponding screw hole. The inner end of the screw part of the fixing bolt extends out of the inner end of the corresponding screw hole and is fixed with a circular clamping plate. The left end face of the circular clamping plate presses against the right end face of the corresponding extension edge. A cylindrical protrusion is formed in the middle of the left end face of the circular clamping plate, which is inserted into the positioning recess formed on the right side wall of the corresponding extension edge.

[0014] The rear wall panel of the main housing has a rear through groove formed in the middle. The bottom surface of the rear through groove extends to the top surface of the bottom plate of the main housing. The left and right sides of the rear through groove extend to the inner side walls of the left and right side panels of the main housing. The rear cover plate is located in the rear through groove and covers the rear through groove. The bottom of the rear cover plate is movably connected to the front wall of the bottom plate of the main housing through multiple hinges. Multiple connecting pieces are fixed to the upper part of the rear wall of the rear cover plate. The connecting pieces are fixed to the upper part of the rear wall of the main housing through bolts.

[0015] The inner wall of the front cover plate is fixed with multiple vertically extending front guide rails, and the rear wall of the front guide rail is formed with a vertically extending guide groove, which corresponds to the guide groove of the corresponding bottom guide rail.

[0016] A front support block is fixed to the upper part of the front wall surface of the front cover.

[0017] A left air guide sleeve is fixed on the outer wall of the left side plate of the main box at the air outlet slot, and an air volume regulating valve is connected to the left air guide sleeve.

[0018] The outstanding effect of this utility model is:

[0019] Compared with existing technologies, it allows for the opening of the front or rear cover to repair and maintain internal components such as the drive motor within the main housing. Simultaneously, the horizontal fixing plate can be moved to the front cover, increasing the operating space for repair and maintenance of components such as the volute. This significantly enhances the maintenance space, facilitating operation and improving maintenance efficiency. Attached image description:

[0020] Figure 1 This is a partial structural schematic diagram of the present invention;

[0021] Figure 2 This is a partial sectional view of the present invention;

[0022] Figure 3 yes Figure 2 A magnified view of a portion of the image;

[0023] Figure 4 This is a partial structural diagram of the front and rear cover plates of this utility model when they are opened;

[0024] Figure 5 yes Figure 4 A magnified view of a portion of the image;

[0025] Figure 6 yes Figure 4 A magnified view of another part. Detailed implementation method:

[0026] For example, see below. Figures 1 to 6As shown, a box-type centrifugal fan that is easy to maintain and repair includes a main box 10. A front through groove 11 is formed in the middle of the front wall panel of the main box 10. The bottom surface of the front through groove 11 extends to the top surface of the bottom plate of the main box 10. The left and right sides of the front through groove 11 extend to the inner sidewalls of the left and right side panels of the main box 10. A front cover plate 12 is located in the front through groove 11 and covers the front through groove 11 (its outer sidewall is close to or close to the corresponding inner sidewall of the front through groove 11). The bottom of the front cover plate 12 is movably connected to the front wall of the bottom plate of the main box 10 through multiple hinges. Multiple connecting pieces 13 are fixed on the upper part of the front wall of the front cover plate 12. The connecting pieces 13 are fixedly connected to the upper part of the front wall of the main box 10 by bolts.

[0027] The top surface of the bottom plate of the main housing 10 is fixed with multiple front-to-back extending bottom guide rails 14. A guide groove is formed in the center of the top surface of each bottom guide rail 14, with the front end of the guide groove extending beyond the front wall of the bottom guide rail 14. A horizontal fixing plate 20 is positioned above all the bottom guide rails 14. Multiple pulleys 21 are mounted on the bottom surface of the horizontal fixing plate 20, with the lower part of each pulley 21 inserted into a corresponding guide groove. The horizontal fixing plate 20 is located within the main housing 10, and both the front and rear parts of the top surface of the horizontal fixing plate 20 are fixed. There is a support frame 22, and the front and rear side walls of the volute 23 are fixed on the corresponding support frame 22. The top right side of the horizontal fixed plate 20 is fixed with a drive motor 24, and the output shaft of the drive motor 24 is fixed with a drive wheel 25. An impeller is installed in the volute 23. The two ends of the impeller shaft extend out of the left and right side plates of the volute 23 and are movably connected to the corresponding support frame 22 through bearings. A transmission wheel 26 is fixed on one end of the shaft, and a transmission belt 27 is tensioned on the transmission wheel 26 and the drive wheel 25.

[0028] Furthermore, a right through groove 15 is formed in the middle of the right side plate of the main housing 10, and an air outlet groove 16 is formed in the middle of the left side plate of the main housing 10.

[0029] On the inner wall of the left side plate of the main housing 10, there are guide strips 17 extending forward and backward at the positions above and below the air outlet groove 16, and a rear baffle 171 is fixed between the rear parts of the two guide strips 17.

[0030] A forward-extending rear vertical limiting strip 172 is fixed on the right side wall of the rear baffle 171. A forward-extending side baffle 173 is fixed on the right side wall of the guide strip 17. The bottom surface of the upper side baffle 173 extends downward, and the top surface of the lower side baffle 173 extends upward. The air outlet connection part 231 at the left end of the volute 23 is inserted between the two guide strips 17. The left ends of the four outer side walls of the air outlet connection part 231 are all formed or fixed with radially extending extension edges 232. The upper and lower extension edges 232 are located between the corresponding side baffle 173 and the right side wall of the left side plate of the main housing 10. The rear extension edge 232 is located between the rear vertical limiting strip 172 and the right side wall of the left side plate of the main housing 10. The left end of the air outlet connection part 231 corresponds to and communicates with the air outlet groove 16. The left end face of the air outlet connection part 231 is close to the inner wall surface of the left side plate of the main housing 10.

[0031] Among them, elastic protective strips are fixed on the front wall surface of the rear baffle 171 and the front wall surface of the rear vertical limiting strip 172, which press against the rear wall surface of the air outlet connection part 231 and the rear wall surface of the rear extension edge 232.

[0032] A sealing ring is nested in a rectangular frame-shaped groove formed on the inner wall of the left side plate of the main housing 10 surrounding the air outlet groove 16. The sealing ring is sandwiched between the left end face of the air outlet connection 231 and the inner wall of the left side plate of the main housing 10.

[0033] Furthermore, the edge material stop strip 173 and the rear vertical limiting strip 172 are formed with multiple connecting screw holes. The screw part of the corresponding fixing bolt 1 is screwed into the corresponding screw hole. The inner end of the screw part of the fixing bolt 1 extends out of the inner end of the corresponding screw hole and is fixed with a circular clamping plate 2. The left end face of the circular clamping plate 2 presses against the right end face of the corresponding extension edge 232. A cylindrical protrusion 3 is formed in the middle of the left end face of the circular clamping plate 2, which is inserted into the positioning recess formed on the right side wall of the corresponding extension edge 232.

[0034] Furthermore, a spring 4 is inserted into the screw portion of the fixing bolt 1. One end of the spring 4 is applied to the right end face of the corresponding circular pressure plate 2, and the other end is applied to the left end face of the corresponding side stop 173 or rear vertical limit strip 172. This structure makes the fixing bolt 1 firmly screwed in by the spring 4, and it is not easy to loosen.

[0035] Furthermore, a rear through groove 18 is formed in the middle of the rear wall panel of the main housing 10. The bottom surface of the rear through groove 18 extends to the top surface of the bottom plate of the main housing 10. The left and right sides of the rear through groove 18 extend to the inner sidewalls of the left and right side panels of the main housing 10. The rear cover plate 19 is located in the rear through groove 18 and covers the rear through groove 18 (its outer sidewall is close to or tightly attached to the corresponding inner sidewall of the rear through groove 18). The bottom of the rear cover plate 19 is movably connected to the front wall of the bottom plate of the main housing 10 through multiple hinges. Multiple connecting pieces 13 are fixed to the upper part of the rear wall of the rear cover plate 19. The connecting pieces 13 are fixedly connected to the upper part of the rear wall of the main housing 10 by bolts.

[0036] Furthermore, a plurality of vertically extending front guide rails 5 are fixed on the inner wall surface of the front cover plate 12, and a vertically extending guide groove is formed in the middle of the rear wall surface of the front guide rail 5, which corresponds to the guide groove of the corresponding bottom guide rail 14.

[0037] Furthermore, a front support block 6 is fixed to the upper part of the front wall of the front cover plate 12. This structure allows the front cover plate 12 to be pressed against the ground by the front support block 6 after it is flipped forward, causing the front guide rail 5 on the front cover plate 12 to extend back and forth and correspond to the guide groove of the corresponding bottom guide rail 14 at the rear. The bottom surface of the guide groove of the front guide rail 5 is basically flat with the bottom surface of the guide groove of the corresponding bottom guide rail 14 at the rear, so as to ensure that the pulley 21 can move from the guide groove of the corresponding bottom guide rail 14 to the guide groove of the corresponding front guide rail 5, realizing its overall movement and facilitating maintenance.

[0038] Furthermore, a left air guide sleeve 7 is fixed on the outer wall of the left side plate of the main housing 10 at the air outlet slot 16, and a right air guide sleeve 8 is fixed on the outer wall of the right side plate of the main housing 10 at the right outlet slot 15.

[0039] The left air guide sleeve 7 is connected to an air volume regulating valve 9. The air volume can be adjusted by the air volume regulating valve 9. The air volume regulating valve 9 is an existing mature product that can be purchased directly, and will not be described in detail here.

[0040] In this embodiment, when routine maintenance is required, the bolts on the connecting piece 13 that connects the connecting piece 13 to the main housing 10 can be removed, and the front cover 12 can be flipped forward to allow for maintenance or simple repairs of the components inside the main housing 10.

[0041] When components such as the volute 23 need to be disassembled for repair and maintenance, the front cover plate 12 and the rear cover plate 19 can be opened and flipped down. The rear wall of the front guide rail 5 has a vertically extending guide groove formed in the middle, which corresponds to the guide groove of the bottom guide rail 14. Then, the corresponding fixing bolt 1 is rotated so that the cylindrical protrusion 3 moves out of the positioning recess formed on the right side wall of the corresponding extension edge 232. Then, it can be manually pulled forward so that the horizontal fixing plate 20 and its components are moved out of the main housing 10. When it is moved out, its air outlet connection 231 moves forward between the two corresponding guide bars 17. Then, it can be repaired and maintained, which is very convenient. Of course, after it is moved out of the main housing 10, wooden blocks or other components need to be placed at the pulley 21 of the corresponding front guide rail 5 guide groove to prevent it from moving and to facilitate the disassembly and installation of components, thus facilitating repair and maintenance.

[0042] Finally, it should be noted that the above embodiments are merely representative examples of this utility model. Obviously, this utility model is not limited to the above embodiments and can have many variations. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model should be considered to fall within the protection scope of this utility model.

Claims

1. A box-type centrifugal fan that is easy to maintain and repair, comprising a main casing (10), characterized in that: The front wall panel of the main housing (10) has a front through groove (11) formed in the middle. The bottom surface of the front through groove (11) extends to the top surface of the bottom plate of the main housing (10). The left and right sides of the front through groove (11) extend to the inner sidewalls of the left and right side panels of the main housing (10). The front cover plate (12) is in the front through groove (11) and covers the front through groove (11). The bottom of the front cover plate (12) is movably connected to the front wall of the bottom plate of the main housing (10) through multiple hinges. Multiple connecting pieces (13) are fixed on the upper part of the front wall of the front cover plate (12). The connecting pieces (13) are fixedly connected to the upper part of the front wall of the main housing (10) by bolts. The top surface of the bottom plate of the main housing (10) is fixed with multiple front-to-back extending bottom guide rails (14). A guide groove is formed in the middle of the top surface of the bottom guide rail (14), and the front end of the guide groove extends out of the front wall of the bottom guide rail (14). A horizontal fixing plate (20) is located above all the bottom guide rails (14). Multiple pulleys (21) are installed on the bottom surface of the horizontal fixing plate (20). The lower part of the pulley (21) is inserted into the corresponding guide groove. The horizontal fixing plate (20) is located in the main housing (10). Supports are fixed at the front and rear of the top surface of the horizontal fixing plate (20). The front and rear side walls of the support frame (22) and the volute (23) are fixed on the corresponding support frame (22). The top right side of the horizontal fixed plate (20) is fixed with a drive motor (24). The output shaft of the drive motor (24) is fixed with a drive wheel (25). An impeller is installed in the volute (23). The two ends of the impeller's shaft extend out of the left and right side plates of the volute (23) and are movably connected to the corresponding support frame (22) through bearings. A transmission wheel (26) is fixed on one end of the shaft. A transmission belt (27) is tensioned on the transmission wheel (26) and the drive wheel (25).

2. The box-type centrifugal fan with convenient maintenance according to claim 1, characterized in that: The right side plate of the main box (10) is formed with a right through groove (15) in the middle, and the left side plate of the main box (10) is formed with an air outlet groove (16). On the inner wall of the left side plate of the main box (10), there are guide strips (17) extending forward and backward, both above and below the air outlet groove (16), and a rear baffle (171) is fixed between the rear parts of the two guide strips (17). A forward-extending rear vertical limiting strip (172) is fixed on the right side wall of the rear baffle (171), and a forward-extending side baffle (173) is fixed on the right side wall of the guide strip (17). The bottom surface of the upper side baffle (173) extends downward, and the top surface of the lower side baffle (173) extends upward. The vent connection part (231) at the left end of the volute (23) is inserted between the two guide strips (17), and the left ends of the four outer side walls of the vent connection part (231) are all formed or fixed. There is a radially extending extension edge (232), the upper and lower extension edges (232) are located between the corresponding side baffle (173) and the right side wall of the left side plate of the main body (10), the rear extension edge (232) is located between the rear vertical limit strip (172) and the right side wall of the left side plate of the main body (10), the left end of the air outlet connection part (231) corresponds to and communicates with the air outlet groove (16), and the left end face of the air outlet connection part (231) is in close contact with the inner wall surface of the left side plate of the main body (10).

3. A box-type centrifugal fan that is easy to maintain and repair according to claim 2, characterized in that: The edge material stop strip (173) and the rear vertical limiting strip (172) are formed with multiple connecting screw holes. The screw part of the corresponding fixing bolt (1) is screwed into the corresponding screw hole. The inner end of the screw part of the fixing bolt (1) extends out of the inner end of the corresponding screw hole and is fixed with a circular clamping plate (2). The left end face of the circular clamping plate (2) presses against the right end face of the corresponding extension edge (232). A cylindrical protrusion (3) is formed in the middle of the left end face of the circular clamping plate (2), which is inserted into the positioning recess formed on the right side wall of the corresponding extension edge (232).

4. A box-type centrifugal fan that is easy to maintain and repair according to claim 3, characterized in that: A spring (4) is inserted into the screw part of the fixing bolt (1). One end of the spring (4) is applied to the right end face of the corresponding circular pressing plate (2), and the other end is applied to the left end face of the corresponding side stop (173) or rear vertical limit strip (172).

5. A box-type centrifugal fan that is easy to maintain and repair according to claim 1, characterized in that: The rear wall panel of the main housing (10) has a rear through groove (18) formed in the middle. The bottom surface of the rear through groove (18) extends to the top surface of the bottom plate of the main housing (10). The left and right sides of the rear through groove (18) extend to the inner side walls of the left and right side panels of the main housing (10). The rear cover plate (19) is located in the rear through groove (18) and covers the rear through groove (18). The bottom of the rear cover plate (19) is movably connected to the front wall of the bottom plate of the main housing (10) through multiple hinges. Multiple connecting pieces (13) are fixed on the upper part of the rear wall of the rear cover plate (19). The connecting pieces (13) are fixedly connected to the upper part of the rear wall of the main housing (10) by bolts.

6. A box-type centrifugal fan that is easy to maintain and repair according to claim 1, characterized in that: The inner wall of the front cover plate (12) is fixed with a plurality of vertically extending front guide rails (5), and the rear wall of the front guide rail (5) is formed with a vertically extending guide groove, which corresponds to the guide groove of the corresponding bottom guide rail (14).

7. A box-type centrifugal fan that is easy to maintain and repair according to claim 1, characterized in that: A front support block (6) is fixed to the upper part of the front wall of the front cover plate (12).

Images