Centrifugal fan

Abstract

The utility model relates to a centrifugal fan, which belongs to the technical field of centrifugal fans and comprises a centrifugal fan, a frame, a driving motor and an air inlet, and a double-layer filtering structure and a lowering structure are arranged on the air inlet and the frame. According to the centrifugal fan, the two filter screens with different pore diameters are arranged, impurities with different particle sizes in air can be filtered in a classified mode, the filtering effect is improved, any arc-shaped plate can be conveniently and independently unlocked through cooperation of the feeding component and the locking frame, the arc-shaped plate slides out of the connecting cylinder, and the filter screens are cleaned or replaced; the arc-shaped plate and the filter screen are lowered out of the range of the air inlet through the supporting plate frame, dust, impurities and the like are prevented from being adsorbed again during cleaning, the whole filter screen can be lowered through a lifting component in the lowering structure, the maintenance difficulty and the operation height are further reduced, the labor intensity of workers is reduced, and the working efficiency is improved. And the filtering effectiveness and the working efficiency of the fan are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to centrifugal fan technical field, concretely is a centrifugal fan. BACKGROUND

[0002] Centrifugal fan is a kind of machinery that relies on input mechanical energy, improves gas pressure and sends gas, it is a driven fluid machinery, centrifugal fan is mainly composed of impeller, casing, air inlet, air outlet, transmission component etc., impeller is the key component of centrifugal fan, usually by blade, hub and wheel cover are formed, the shape and quantity of blade can influence the performance of fan, casing is generally snail shell shape, is used to collect and guide gas, air inlet and air outlet are used for gas suction and discharge respectively, transmission component includes motor, shaft coupling, bearing etc., is used to transmit the power of motor to impeller, its characteristics are large flow, stable pressure, high efficiency and wide application range, is widely used in industrial field, commercial and civil building, other fields etc.

[0003] At present, in prior art, when conveying gas containing impurities by centrifugal fan, it is needed to install filter screen at air inlet, the impurities or foreign matters in gas are filtered by filter screen, however, due to the continuous suction force generated by centrifugal fan, the impurities or foreign matters are adsorbed on filter screen, thereby plugging the mesh holes on filter screen, further affecting the flow of centrifugal fan, if direct cleaning method is used, part of dust impurities will enter the inside of centrifugal fan, affecting the purity of output gas, if it is disassembled and cleaned, it needs to stop operation, therefore, a centrifugal fan is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0004] In view of the defects of prior art, the utility model provides a centrifugal fan, which has the advantages of avoiding stop cleaning and being convenient to disassemble, solves the problems that when conveying gas containing impurities by centrifugal fan, it is needed to install filter screen at air inlet, the impurities or foreign matters in gas are filtered by filter screen, however, due to the continuous suction force generated by centrifugal fan, the impurities or foreign matters are adsorbed on filter screen, thereby plugging the mesh holes on filter screen, further affecting the flow of centrifugal fan, if direct cleaning method is used, part of dust impurities will enter the inside of centrifugal fan, affecting the purity of output gas, if it is disassembled and cleaned, it needs to stop operation.

[0005] To achieve the above object, the utility model provides the following technical scheme: a centrifugal fan, including centrifugal fan, frame, drive motor and air inlet, the air inlet and frame are provided with double-layer filter structure and lower structure;

[0006] The double-layer filtering structure comprises a guide frame, a connecting cylinder, two arc-shaped plate members, two filtering screens, a limiting frame, a locking frame and a feeding component, the guide frame is fixedly installed on a rack, the connecting cylinder is fixedly installed on an air inlet, the two arc-shaped plate members are embedded in the interior of the connecting cylinder and are in sliding connection with the guide frame, the two filtering screens are fixedly installed on the two arc-shaped plate members and are located in the interior of the connecting cylinder, the limiting frame is fixedly installed on the top of the guide frame, the locking frame is slidingly installed in the interior of the limiting frame and penetrates through the two arc-shaped plate members at two ends, and the feeding component is fixedly installed on the limiting frame and is used for controlling the movement of the locking frame.

[0007] Further, the lowering structure comprises a supporting plate frame and a lifting component, the supporting plate frame is slidingly installed on the outer surface of the guide frame, the lifting component comprises two mounting tables and two electric push rods, the two electric push rods are fixedly installed on the two mounting tables respectively, the two mounting tables are fixedly installed on the centrifugal fan, and the telescopic ends of the two electric push rods are fixedly connected with the top of the supporting plate frame respectively.

[0008] Further, the centrifugal fan is fixedly installed on the rack, the driving motor is fixedly installed on the rack, the output shaft of the driving motor is installed on the centrifugal fan, and the air inlet is fixedly installed on the centrifugal fan.

[0009] Further, the connecting cylinder is provided with an arc-shaped groove matched with the two arc-shaped plate members, a sealing strip is fixedly installed on the inner wall of the connecting cylinder, and a semi-ring groove matched with the sealing strip is formed in the outer peripheral wall of each of the two filtering screens.

[0010] Further, each of the two arc-shaped plate members comprises a semi-ring plate and two connecting plates, the two connecting plates are fixedly installed on the semi-ring plate and are symmetrically distributed, four guide grooves are formed in the guide frame, and the connecting plates penetrate through the guide grooves and are in sliding connection with the inner walls of the guide grooves.

[0011] Further, a positioning hole is formed in each of the four connecting plates, one end of the locking frame penetrates through the positioning holes formed in the two connecting plates on the same side, the top of the supporting plate frame is in close contact with the bottoms of the four connecting plates respectively, the locking frame is composed of a U-shaped frame and two double-hook frames, the length of the short hook end of the double-hook frame is half of the length of the long hook end, and the spacing between the short hook end and the long hook end of the double-hook frame is matched with the thickness of the connecting plate.

[0012] Further, the feeding component comprises a linear driver, the linear driver is fixedly installed on the limiting frame, a through hole is formed in the limiting frame, the telescopic end of the linear driver penetrates through the through hole and is fixedly connected with the locking frame.

[0013] Further, the pore diameters of the two filtering screens are -microns and -microns respectively, and the filtering screen with the smaller pore diameter is located close to the air inlet.

[0014] Compared with the prior art, the technical scheme of the application has the following beneficial effects:

[0015] The centrifugal fan can perform graded filtration on impurities of different particle sizes in the air, improve the filtration effect, effectively prevent dust, impurities and the like from entering the centrifugal fan, and through cooperation of the feeding component and the locking frame, any one arc-shaped plate can be conveniently and individually unlocked and slid out of the connecting cylinder for cleaning or replacement of the filter screen, and the arc-shaped plate and the filter screen are lowered outside the air inlet range by the supporting plate frame, so that dust and impurities are not re-adsorbed during cleaning, and the lifting component in the lowering structure can lower the filter screen as a whole, further reducing the difficulty and operation height of maintenance, reducing the labor intensity of workers, and ensuring the effectiveness of filtration and the working efficiency of the fan. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the utility model Figure 1 of the utility model;

[0018] Figure 3 It is an enlarged view of A in the structural schematic diagram Figure 1 of the utility model;

[0019] Figure 4 It is a perspective view of the connecting cylinder, the arc-shaped plate and the filter screen of the utility model structure;

[0020] Figure 5 It is an exploded view of the connecting cylinder, the arc-shaped plate and the filter screen of the utility model structure;

[0021] Figure 6 It is a perspective view of the guide frame, the supporting plate frame and the lifting component of the utility model structure;

[0022] Figure 7 It is a perspective view of the locking frame, the feeding component and the limiting frame of the utility model structure.

[0023] In the drawing: 1, centrifugal fan; 2, rack; 3, driving motor; 4, air inlet; 51, guide frame; 52, connecting cylinder; 53, arc-shaped plate; 54, filter screen; 55, limiting frame; 56, locking frame; 57, feeding component; 61, supporting plate frame; 62, lifting component. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0025] Embodiment one: please refer to Figures 1-7 The centrifugal fan in the embodiment comprises a centrifugal fan 1, a rack 2, a driving motor 3 and an air inlet 4, the air inlet 4 and the rack 2 are provided with a double-layer filtering structure and a lower placing structure, the centrifugal fan 1 is fixedly installed on the rack 2, the driving motor 3 is fixedly installed on the rack 2, an output shaft of the driving motor 3 is installed with the centrifugal fan 1, and the air inlet 4 is fixedly installed on the centrifugal fan 1.

[0026] Embodiment two: please refer to Figures 1-7 On the basis of embodiment one, the double-layer filtering structure comprises a guide frame 51, a connecting cylinder 52, two arc-shaped plate members 53, two filter screens 54, a limiting frame 55, a locking rack 56 and a feeding component 57, the guide frame 51 is fixedly installed on the rack 2, the connecting cylinder 52 is fixedly installed on the air inlet 4, the two arc-shaped plate members 53 are embedded in the inside of the connecting cylinder 52 and are in sliding connection with the guide frame 51, the two filter screens 54 are fixedly installed on the two arc-shaped plate members 53 and are located in the inside of the connecting cylinder 52, the limiting frame 55 is fixedly installed on the top of the guide frame 51, the locking rack 56 is slidingly installed in the inside of the limiting frame 55 and penetrates through the two arc-shaped plate members 53 at two ends, the feeding component 57 is fixedly installed on the limiting frame 55 and is used for controlling the movement of the locking rack 56, the pore diameters of the two filter screens 54 are 20-50 microns and 50-100 microns respectively, and the filter screen 54 with the smaller pore diameter is close to the air inlet 4, so that the filter screen 54 with the pore diameter of 20-50 microns is used for filtering flocculation or larger impurities, and the filter screen 54 with the pore diameter of 50-100 microns is used for filtering fine dust, thereby improving the output purity of the gas.

[0027] The connecting cylinder 52 is provided with an arc-shaped groove matched with the two arc-shaped plate members 53, and a sealing strip is fixedly installed on the inner wall of the connecting cylinder 52, and a semicircular groove matched with the sealing strip is formed in the outer circumferential wall of each filter screen 54, so that after the filter screen 54 is inserted into the inside of the connecting cylinder 52, the sealing strip cooperates with the semicircular groove to realize the sealing connection between the filter screen 54 and the connecting cylinder 52.

[0028] In addition, the two arc-shaped plate members 53 each include a half-ring plate and two connecting plates fixedly installed on the half-ring plate and symmetrically distributed, the guide frame 51 is provided with four guide grooves, and the connecting plates penetrate the guide grooves and are in sliding connection with the inner walls of the guide grooves, so that the sliding stability of the half-ring plate is limited and stabilized during the up-and-down movement of the arc-shaped plate member 53.

[0029] It should be noted that the feeding component 57 includes a linear actuator fixedly installed on the limiting frame 55, the limiting frame 55 is provided with a through hole, the telescopic end of the linear actuator penetrates the through hole and is fixedly connected with the locking bracket 56, the linear actuator is started to be elongated, and the locking bracket 56 is moved towards the centrifugal fan 1, so as to sequentially release the locking of the two arc-shaped plate members 53.

[0030] With the above technical scheme, when the filter screen 54 is blocked to cause the output flow of the centrifugal fan 1 to decrease, the linear actuator in the feeding component 57 is started to be elongated, and the locking bracket 56 is moved towards the centrifugal fan 1, so that the locking bracket 56 exits the distal arc-shaped plate member 53, thereby releasing the fixation of the distal arc-shaped plate member 53, or the linear actuator is continuously started to be elongated, and the locking bracket 56 is continuously moved towards the centrifugal fan 1 until the locking bracket 56 is inserted into the distal arc-shaped plate member 53 and exits the proximal arc-shaped plate member 53, thereby realizing the release of the fixation of any one of the arc-shaped plate members 53, and facilitating the processing of any one of the filter screens 54.

[0031] Embodiment three: please refer to Figures 1-7 On the basis of embodiment two, the lowering structure includes a supporting plate bracket 61 and a lifting component 62, the supporting plate bracket 61 is slidingly installed on the outer surface of the guide frame 51, the lifting component 62 includes two mounting tables and two electric push rods, the two electric push rods are fixedly installed on the two mounting tables, the two mounting tables are fixedly installed on the centrifugal fan 1, and the telescopic ends of the two electric push rods are fixedly connected with the top of the supporting plate bracket 61.

[0032] The four connecting plates are each provided with a positioning hole, one end of the locking bracket 56 penetrates the positioning holes provided in the two connecting plates on the same side, and the top of the supporting plate bracket 61 is in close contact with the bottoms of the four connecting plates, so as to start the elongation of the electric push rods, move the supporting plate bracket 61 downwards, and stably lower the arc-shaped plate member 53 and the filter screen 54 to a suitable position by the supporting plate bracket 61. The locking bracket 56 is composed of a U-shaped bracket and two double-hook brackets, the length of the short hook end of the double-hook bracket is half of the length of the long hook end, and the spacing between the short hook end and the long hook end of the double-hook bracket is adapted to the thickness of the connecting plate, so as to flexibly release the connecting plate.

[0033] Using the above technical solution, the electric push rod in the lifting component 62 is activated, which drives the pallet frame 61 to move towards each other. At this time, the arc-shaped plate 53, which is released from its fixed position, moves towards each other with the pallet frame 61 under the action of gravity, thereby driving the filter screen 54 out of the interior of the connecting cylinder 52. After the filter screen 54 is moved out of the air intake range of the centrifugal fan 1, it is convenient for the staff to clean the filter screen 54 separately, and to avoid the impurities or dust being sucked up by the suction of the centrifugal fan 1.

[0034] The working principle of the above embodiments is as follows:

[0035] When the centrifugal fan is in operation, external gas enters the air inlet 4 through the connecting cylinder 52 and then enters the centrifugal fan 1. The incoming air passes through two filters 54 in sequence. The filter 54 with a pore size of 20-50 micrometers filters out flocculent matter or larger impurities, and the filter 54 with a pore size of 50-100 micrometers filters out fine dust, thereby improving the purity of the output gas.

[0036] When the filter screen 54 becomes clogged, causing the output flow of the centrifugal fan 1 to decrease, the linear drive in the feed component 57 is activated, and the locking frame 56 is moved toward the centrifugal fan 1, causing the locking frame 56 to disengage from the distal arc-shaped plate 53, thereby releasing the fixation of the distal arc-shaped plate 53. Then, the electric push rod in the lifting component 62 is activated, and the pallet frame 61 is moved toward each other. At this time, the unfixed arc-shaped plate 53 moves toward each other with the pallet frame 61 under the action of gravity, thereby moving the filter screen 54 out of the interior of the connecting cylinder 52 until the filter screen 54 is moved out of the air intake range of the centrifugal fan 1, making it convenient for the staff to clean the flocculent material or larger impurities on the distal filter screen 54 separately.

[0037] After the distal filter 54 is cleaned, the lifting component 62 is activated and the electric push rod drives the tray frame 61 to lift the distal arc plate 53 until the distal arc plate 53 and the filter 54 are re-embedded into the connecting cylinder 52. The linear drive is then activated and the locking frame 56 is moved towards the centrifugal fan 1 until the locking frame 56 is inserted into the distal arc plate 53 and withdrawn from the proximal arc plate 53. Then the electric push rod in the feeding component 57 is activated and the tray frame 61 and the proximal arc plate 53 move towards each other, thereby removing the proximal filter 54 out of the air intake range of the centrifugal fan 1, making it easier for staff to clean the dust on the proximal filter 54 separately.

[0038] When the cleaning of the proximal filter screen 54 is completed, the lifting component 62 is started and the proximal arc-shaped plate 53 is lifted by the electric push rod with the tray frame 61 until the proximal arc-shaped plate 53 and the filter screen 54 are re-embedded in the inside of the connecting cylinder 52, and then the cleaning of the filter screen 54 is completed. Finally, the linear driver in the feeding component 57 is started to retract and drive the locking frame 56 to move away from the centrifugal fan 1, and then the locking frame 56 controls the two arc-shaped plates 53 to be locked again.

[0039] It is to be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0040] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A centrifugal fan, comprising a centrifugal fan (1), a frame (2), a drive motor (3), and an air inlet (4), characterized in that: The air inlet (4) and the frame (2) are equipped with a double-layer filter structure and a downward structure; The double-layer filter structure includes a guide frame (51), a connecting cylinder (52), two arc-shaped plates (53), two filter screens (54), a limiting frame (55), a locking frame (56), and a feeding component (57). The guide frame (51) is fixedly installed on the frame (2), the connecting cylinder (52) is fixedly installed on the air inlet (4), the two arc-shaped plates (53) are embedded inside the connecting cylinder (52) and slidably connected to the guide frame (51), the two filter screens (54) are respectively fixedly installed on the two arc-shaped plates (53) and are both located inside the connecting cylinder (52), the limiting frame (55) is fixedly installed on the top of the guide frame (51), the locking frame (56) is slidably installed inside the limiting frame (55) and its two ends pass through the two arc-shaped plates (53), and the feeding component (57) is fixedly installed on the limiting frame (55) and is used to control the movement of the locking frame (56).

2. A centrifugal fan according to claim 1, characterized in that: The lowering structure includes a pallet frame (61) and a lifting component (62). The pallet frame (61) is slidably installed on the outer surface of the guide frame (51). The lifting component (62) includes two mounting platforms and two electric push rods. The two electric push rods are respectively fixedly installed on the two mounting platforms. The two mounting platforms are fixedly installed on the centrifugal fan (1). The telescopic ends of the two electric push rods are respectively fixedly connected to the top of the pallet frame (61).

3. A centrifugal fan according to claim 1, characterized in that: The centrifugal fan (1) is fixedly installed on the frame (2), the drive motor (3) is fixedly installed on the frame (2), the output shaft of the drive motor (3) is installed with the centrifugal fan (1), and the air inlet (4) is fixedly installed on the centrifugal fan (1).

4. A centrifugal fan according to claim 1, characterized in that: The connecting cylinder (52) has an arc groove adapted to the two arc plates (53). A sealing strip is fixedly installed on the inner wall of the connecting cylinder (52). A semi-circular groove adapted to the sealing strip is opened on the outer peripheral wall of the two filter screens (54).

5. A centrifugal fan according to claim 2, characterized in that: Both of the arc-shaped plates (53) include a semi-ring plate and two connecting plates. The two connecting plates are fixedly installed on the semi-ring plate and are symmetrically distributed. The guide frame (51) has four guide grooves. The connecting plates pass through the guide grooves and are slidably connected to the inner wall of the guide grooves.

6. A centrifugal fan according to claim 5, characterized in that: Positioning holes are provided on all four connecting plates. One end of the locking frame (56) passes through the positioning holes on the two connecting plates on the same side. The top of the tray frame (61) is in close contact with the bottom of the four connecting plates. The locking frame (56) is composed of a U-shaped frame and two double hook frames. The length of the short hook end of the double hook frame is half the length of the long hook end. The distance between the short hook end and the long hook end of the double hook frame is adapted to the thickness of the connecting plate.

7. A centrifugal fan according to claim 1, characterized in that: The feeding component (57) includes a linear actuator, which is fixedly mounted on a limiting frame (55). The limiting frame (55) has a through hole, and the telescopic end of the linear actuator passes through the through hole and is fixedly connected to the locking frame (56).

8. A centrifugal fan according to claim 1, characterized in that: The pore sizes of the two filters (54) are 20-50 micrometers and 50-100 micrometers, respectively, with the filter (54) with the smaller pore size being closer to the air inlet (4).

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