Gas filtering and cleaning mechanism of purification type centrifugal fan

Abstract

The invention belongs to the technical field of centrifugal ventilators, and discloses a purification type centrifugal ventilator gas filtering and cleaning mechanism which comprises a ventilation frame, and gas filtering and cleaning mechanisms are symmetrically and fixedly installed on the two sides of the inner wall of the ventilation frame. A fixing plate is fixedly installed at the position, located on one side of one gas filtering and cleaning mechanism, of the inner wall of the ventilation frame, a centrifugal fan is fixedly installed at one end of the fixing plate, dust filtering frames are symmetrically installed in the ventilation frame, and filtering nets are installed in the dust filtering frames in a clamped mode, so that gas can make full contact with the filtering nets; according to the self-cleaning filter screen, impurities in gas are effectively intercepted, the gas is prevented from being directly discharged without being filtered, the filtering blind area is reduced, the filtering uniformity and consistency are improved, the self-cleaning purpose of the filter screen is achieved, meanwhile, the drainage position is adjusted, and the purpose that different parts of the filter screen are cleaned respectively is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of centrifugal fans, and in particular relates to a gas filtering and cleaning mechanism of a purification type centrifugal fan. Background Art

[0002] Centrifugal fan is a common ventilation equipment, widely used in industrial, commercial and civil fields. The following is a detailed introduction to centrifugal fan: The working principle of the centrifugal fan is based on the action of centrifugal force. When the impeller rotates with the shaft, the gas between the blades obtains centrifugal force, is thrown out of the impeller and enters the casing, and the gas pressure in the casing increases accordingly, and is finally discharged through the outlet. The rotation of the impeller makes the gas obtain kinetic energy, and then part of the kinetic energy is converted into static pressure through the volute and diffuser. The main components of a centrifugal fan include an impeller, a casing, an air inlet, a transmission unit, and a motor. The impeller is the core component, and the common blade types are forward, backward, and radial. The casing is usually a volute structure, which is used to collect gas and convert its kinetic energy into static pressure.

[0003] For example, the current box-type centrifugal fan improves the filtering performance of the centrifugal fan by installing a filtering structure inside the box. However, when the device is in operation, the gas moves along the outside of the filtering structure, causing dust to accumulate on the outside of the filtering structure, resulting in the problem that the filtering structure needs to be cleaned and replaced frequently. Summary of the invention

[0004] The present invention aims to solve the problem in the prior art that the gas moves along the outside of the filter structure, causing dust to accumulate on the outside of the filter structure, thereby requiring the filter structure to be frequently cleaned and replaced. The present invention proposes the following technical solution: A gas filtering and cleaning mechanism of a purification type centrifugal fan comprises: a ventilation frame, gas filtering and cleaning mechanisms are symmetrically fixedly installed on both sides of the inner wall of the ventilation frame, a fixing plate is fixedly installed on the inner wall of the ventilation frame at a position on one side of one of the gas filtering and cleaning mechanisms, a centrifugal fan is fixedly installed on one end of the fixing plate, a dust filtering frame is symmetrically installed inside the ventilation frame, a filter screen is clamped and installed inside the dust filtering frame, and a gas filtering and drainage component is installed outside the air inlet port of the centrifugal fan; The gas filtering and drainage assembly includes a drainage pipe fixedly installed on the outside of the air inlet port of the centrifugal fan, a bellows fixedly installed on one end of the drainage pipe, a guide cover installed on one end of the bellows, a mounting block integrally formed on the top of the guide cover, a screw rod rotatably connected to the inside of the ventilation frame through a threaded connection inside the mounting block, a cross plate clamped on the top of the guide cover, a rectangular frame clamped on the bottom end of the cross plate between the two dust filter frames, and a drainage frame clamped on the edge of the bottom end of the cross plate.

[0005] As a preferred embodiment of the above technical solution, the screw rod is rotatably connected to the inside of the ventilation frame, a belt structure is fixedly installed on the outside of the screw rod, a motor is installed on the bottom end of the belt structure, and the motor is fixedly installed at the bottom end of the inner wall of the ventilation frame. The belt structure is composed of two pulleys and a belt, one of the pulleys is fixedly installed on the outside of the screw rod, and the other pulley is fixedly installed on the outside of the motor output shaft.

[0006] As a preferred embodiment of the above technical solution, mounting bars are symmetrically installed on both sides of the drainage frame, a gas barrier cloth is fixedly installed on one end of the mounting bar, a movable bar is fixedly installed on one end of the gas barrier cloth, and the movable bar is slidably connected to the inside of the ventilation frame.

[0007] As a preferred embodiment of the above technical solution, a connecting rope is fixedly installed at one end of the movable bar, a base is fixedly installed at the bottom end of the connecting rope, the base is slidably connected to the inside of the ventilation frame, a spring column is clamped on the top of the base, and the top of the spring column is fixedly installed on the inner wall of the ventilation frame.

[0008] As a preferred embodiment of the above technical solution, a guide column is rotatably connected to the inner wall of the ventilation frame at the outer side of the gas barrier cloth, and a guide block is rotatably installed on the inner wall of the ventilation frame at the corner of the connecting rope.

[0009] As a preferred embodiment of the above technical solution, a placement groove is provided at the top of the dust filter frame, and the horizontal plate is located inside the placement groove.

[0010] As a preferred embodiment of the above technical solution, indirect pushing components are symmetrically installed on both sides of the rectangular frame, and the indirect pushing components include vertical bars fixedly installed on the two side surfaces of the rectangular frame, and spring rods are symmetrically embedded and installed on both end surfaces of the vertical bars. The same pushing plate is fixedly installed between the two spring rods, and an inclined plate is fixedly installed on one end edge of the pushing plate.

[0011] As a preferred embodiment of the above technical solution, a rack is installed at the top of the inner wall of the ventilation frame, and the bottom end of the rack is meshed and connected with two gears, one end of the gear is rotatably connected to an L-shaped support rod, and the L-shaped support rod is fixedly installed on the top of the rectangular frame, and one end of the gear is fixedly installed with a cam, the bottom end of the cam is rotatably connected to a connecting rod, the bottom end of the connecting rod is rotatably connected to a movable rod, and the bottom end of the movable rod is welded with an extrusion block.

[0012] As a preferred embodiment of the above technical solution, the movable rod is slidably connected to the inside of the rectangular frame, and the bottom end of the extrusion block and the top end of the push plate are in contact with each other.

[0013] The beneficial effects of the present invention are: (1) It can fully contact the gas with the filter, effectively intercept impurities in the gas, prevent the gas from passing through and being discharged without being filtered, reduce the blind area of ​​filtration, improve the uniformity and consistency of filtration, and prevent the gas from flowing along the outer area of ​​the filter, so that the dust inside the area where the gas has not yet flowed falls due to the vibration force, thereby achieving the purpose of self-cleaning of the filter. At the same time, the drainage position is adjusted to achieve the purpose of cleaning different parts of the filter; (2) The dynamic sealing and automatic reset functions significantly improve the sealing, adaptability, stability and reliability of the device, so that the gas can flow along the inside of the gas filter and drainage component, preventing the gas from flowing in all directions along the inside of the ventilation frame; (3) Through mechanical transmission and dynamic cleaning functions, the filter can be automatically cleaned, which significantly improves the filtration efficiency, extends the service life of the filter, and reduces labor maintenance costs and system downtime. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 What is shown is a schematic diagram of the overall structure in Example 1; Figure 2 What is shown is a cross-sectional view of the overall structure in Example 1; Figure 3 The figure shows a schematic diagram of the installation structure of the filter screen in Example 1; Figure 4 The figure shows a schematic diagram of the installation structure of the gas filtering and drainage assembly in Example 1; Figure 5 It is shown that Figure 4 Schematic diagram of the structure of the middle A area; Figure 6 The structure diagram of the indirect driving component in Example 1 is shown; Figure 7 It is shown that Figure 6 Schematic diagram of the structure of area B in the middle.

[0015] In the figure: 1. ventilation frame; 2. gas filtering and cleaning mechanism; 3. fixing plate; 4. centrifugal fan; 5. dust filtering frame; 6. filter screen; 7. gas filtering and drainage assembly; 71. drainage pipe; 72. bellows; 73. deflector; 74. mounting block; 75. screw rod; 76. belt structure; 77. motor; 78. horizontal plate; 79. rectangular frame; 710. drainage frame; 711. mounting strip; 712. gas barrier cloth; 713. moving strip; 714. connecting rope; 715. base; 716. spring column; 717. guide block; 718. guide column; 8. indirect pushing assembly; 81. rack; 82. gear; 83. L-shaped support rod; 84. cam; 85. connecting rod; 86. movable rod; 87. extrusion block; 88. vertical strip; 89. spring rod; 810. pushing plate; 811. tilting plate. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0017] Embodiment 1: The present invention provides a gas filtering and cleaning mechanism for a purification type centrifugal fan, such as Figures 1 to 7 As shown, it comprises: a ventilation frame 1, gas filtering and cleaning mechanisms 2 are symmetrically fixedly installed on both sides of the inner wall of the ventilation frame 1, a fixing plate 3 is fixedly installed on the inner wall of the ventilation frame 1 at a position on one side of one of the gas filtering and cleaning mechanisms 2, a centrifugal fan 4 is fixedly installed at one end of the fixing plate 3, a dust filtering frame 5 is symmetrically installed inside the ventilation frame 1, a filter screen 6 is clamped and installed inside the dust filtering frame 5, and a gas filtering and drainage component 7 is installed outside the air inlet port of the centrifugal fan 4; The gas filtering and drainage assembly 7 includes a drainage pipe 71 fixedly installed on the outside of the air inlet port of the centrifugal fan 4, a bellows 72 fixedly installed on one end of the drainage pipe 71, a guide cover 73 installed on one end of the bellows 72, a mounting block 74 integrally formed on the top of the guide cover 73, a screw rod 75 rotatably connected to the inside of the ventilation frame 1 is threadedly connected inside the mounting block 74, a cross plate 78 is clamped and installed on the top of the guide cover 73, a rectangular frame 79 is clamped and installed at the bottom end of the cross plate 78 between the two dust filter frames 5, and a drainage frame 710 is clamped and installed on the bottom edge of the cross plate 78.

[0018] like Figure 3 and Figure 4As shown, the screw rod 75 is rotatably connected to the inside of the ventilation frame 1, a belt structure 76 is fixedly installed on the outside of the screw rod 75, a motor 77 is installed at the bottom end of the belt structure 76, and the motor 77 is fixedly installed at the bottom end of the inner wall of the ventilation frame 1. The belt structure 76 is composed of two pulleys and a belt, one of which is fixedly installed on the outside of the screw rod 75, and the other pulley is fixedly installed on the outside of the output shaft of the motor 77; Because the motor 77 is connected to the power supply and starts to run, the motor 77 drives the screw rod 75 to rotate through the belt structure 76 when it is running. When the screw rod 75 rotates, it drives the mounting block 74 to move, and under the limiting action of the cross plate 78, the mounting block 74 moves left and right, which changes the difficulty of moving the mounting block 74 left and right.

[0019] like Figures 3 to 5 As shown, installation bars 711 are symmetrically installed on both sides of the drainage frame 710, and a gas barrier cloth 712 is fixedly installed on one end of the installation bar 711. The material of the gas barrier cloth 712 is polyurethane, and a moving bar 713 is fixedly installed on one end of the gas barrier cloth 712, and the moving bar 713 is slidably connected to the inside of the ventilation frame 1; When the moving bar 713 moves, it drives the gas barrier cloth 712 to move. When the gas barrier cloth 712 moves, it blocks the gas entering one end of the filter net 6, so that the gas can only enter the gas filtering and drainage component 7, thereby changing the difficulty of the gas entering the gas filtering and drainage component 7.

[0020] like Figures 3 to 5 As shown, a connecting rope 714 is fixedly installed at one end of the moving bar 713, a base 715 is fixedly installed at the bottom end of the connecting rope 714, the base 715 is slidably connected to the inside of the ventilation frame 1, a spring column 716 is clamped and installed at the top of the base 715, and the top of the spring column 716 is fixedly installed on the inner wall of the ventilation frame 1; When the connecting rope 714 moves, it drives the base 715 to move. When the base 715 moves, it drives the spring column 716 to be compressed. When the connecting rope 714 is reset, the reset force of the spring column 716 drives the base 715 to move. When the base 715 moves, the connecting rope 714 moves in the opposite direction, which changes the difficulty of moving the connecting rope 714 back and forth.

[0021] like Figures 3 to 5 As shown, the inner wall of the ventilation frame 1 is located at the outer side of the gas barrier cloth 712 and is rotatably connected to a guide column 718, and the inner wall of the ventilation frame 1 is located at the corner of the connecting rope 714 and is rotatably installed with a guide block 717; The gas barrier cloth 712 and the connecting rope 714 can be folded by the guide block 717 and the guide column 718 , thereby reducing the difficulty of folding the gas barrier cloth 712 and the connecting rope 714 .

[0022] like Figure 2 and Figure 3 As shown, a placement slot is provided at the top of the dust filter frame 5, and the horizontal plate 78 is located inside the placement slot; The insertion of the transverse plate 78 can be facilitated without affecting the installation and fixation of the dust filter frame 5 .

[0023] like Figure 6 and Figure 7 As shown, the indirect push assembly 8 is symmetrically installed on both sides of the rectangular frame 79, and the indirect push assembly 8 includes a vertical bar 88 fixedly installed on the two sides of the rectangular frame 79, and spring rods 89 are symmetrically embedded and installed on both ends of the vertical bar 88. The same push plate 810 is fixedly installed between the two spring rods 89, and an inclined plate 811 is fixedly installed on one end of the push plate 810. When the push plate 810 moves, the inclined plate 811 is driven to move, and when the inclined plate 811 moves, the filter screen 6 is squeezed, so that the filter screen 6 stretches back and forth, thereby causing the dirt inside the filter screen 6 to fall off, and under the action of the spring rod 89, the push plate 810 is easily reset, thereby changing the difficulty of resetting the push plate 810.

[0024] like Figure 6 and Figure 7 As shown, a rack 81 is installed at the top of the inner wall of the ventilation frame 1, and two gears 82 are meshed and connected at the bottom end of the rack 81. One end of the gear 82 is rotatably connected to an L-shaped support rod 83, and the L-shaped support rod 83 is fixedly installed at the top of the rectangular frame 79. A cam 84 is fixedly installed at one end of the gear 82. A connecting rod 85 is rotatably connected to the bottom end of the cam 84. A movable rod 86 is rotatably connected to the bottom end of the connecting rod 85. An extrusion block 87 is welded at the bottom end of the movable rod 86. The movable rod 86 is slidably connected to the inside of the rectangular frame 79. The bottom end of the extrusion block 87 and the top end of the push plate 810 fit each other. The top end of the push plate 810 is provided with an inclined angle, and the shape of the extrusion block 87 is triangular. When the rectangular frame 79 moves, it drives the L-shaped support rod 83 to move, and when the L-shaped support rod 83 moves, it drives the gear 82 to move. When the gear 82 moves, it engages with the rack 81, causing the gear 82 to rotate. When the gear 82 rotates, it drives the cam 84 to rotate. When the cam 84 rotates, it drives the connecting rod 85 to swing. When the connecting rod 85 swings, it drives the movable rod 86 to rise and fall. When the movable rod 86 rises and falls, it drives the push plate 810 to move, thereby changing the difficulty of moving the push plate 810.

[0025] Working principle: During the use of the device, the centrifugal fan 4 is first started, and then the motor 77 is connected to the power supply and starts to run. When the motor 77 is running, the belt structure 76 drives the screw rod 75 to rotate. When the screw rod 75 rotates, it drives the mounting block 74 to move, and the mounting block 74 moves under the action of the limit of the cross plate 78. When the mounting block 74 moves, it drives the guide cover 73 to move. When the guide cover 73 moves, it drives the rectangular frame 79 and the drainage frame 710 to move in turn under the action of the cross plate 78. At the same time, the bellows 72 is bent when the guide cover 73 moves. The gas extracted by the centrifugal fan 4 enters along the drainage frame 710, the rectangular frame 79, the guide cover 73, the bellows 72 and the drainage pipe 71 When the gas reaches the inside of the centrifugal fan 4, the gas is filtered through the filter 6 when it moves between the rectangular frame 79 and the guide cover 73. The gas is drained by the structural design to prevent the gas from moving along the outside of the entire filter 6. The gas can be fully contacted with the filter 6, effectively intercepting impurities in the gas, preventing the gas from being discharged directly without being filtered, and reducing the filtering blind area, improving the uniformity and consistency of the filtration, and preventing the gas from flowing along the outer area of ​​the filter 6 all the time, so that the dust in the area where the gas has not yet flowed falls due to the vibration force, thereby achieving the purpose of self-cleaning of the filter 6. At the same time, the drainage position is adjusted to achieve the purpose of cleaning different parts of the filter 6. Then, when the drainage frame 710 moves, it drives the installation bar 711 to move, and when the installation bar 711 moves, it drives the gas barrier cloth 712 to move. After the gas barrier cloth 712 moves, it is folded through the guide column 718, so as to block the gap between the drainage frame 710 and the inner wall of the ventilation frame 1. When the gas barrier cloth 712 moves, it drives the moving bar 713 to move, and the moving bar 713 drives the base 715 to move through the connecting rope 714. When the base 715 moves, it drives the spring column 716 to stretch, and at the same time, the spring column 716 installed at one end of the other gas barrier cloth 712 is compressed. On the contrary, when the connecting rope 714 is reset, the reset force of the spring column 716 drives the base 715 to move. When the base 715 moves, the connecting rope 714 moves in the opposite direction. Through the functions of dynamic sealing and automatic reset, the sealing, adaptability, stability and reliability of the device are significantly improved, so that the gas can flow along the inside of the gas filtering and drainage component 7, and the gas is prevented from flowing in all directions along the inside of the ventilation frame 1. Finally, as the rectangular frame 79 moves, it drives the L-shaped support rod 83 to move, and the L-shaped support rod 83 moves, it drives the gear 82 to move. When the gear 82 moves, it engages with the rack 81, causing the gear 82 to rotate. When the gear 82 rotates, it drives the cam 84 to rotate. When the cam 84 rotates, it drives the connecting rod 85 to swing. When the connecting rod 85 swings, it drives the movable rod 86 to rise and fall. When the movable rod 86 rises and falls, it drives the push plate 810 to move. When the push plate 810 moves, it drives the inclined plate 811 to move. When the inclined plate 811 moves, it squeezes the filter screen 6, causing the filter screen 6 to stretch back and forth, thereby causing the dirt inside the filter screen 6 to fall off. Through mechanical transmission and dynamic cleaning functions, the automatic cleaning of the filter screen 6 is realized, which significantly improves the filtering efficiency, extends the service life of the filter screen 6, and reduces the labor maintenance cost and system downtime. The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A gas filtering and cleaning mechanism for a purification type centrifugal fan, characterized in that: include: A ventilation frame (1), gas filtering and cleaning mechanisms (2) are symmetrically fixedly installed on both sides of the inner wall of the ventilation frame (1), a fixing plate (3) is fixedly installed on the inner wall of the ventilation frame (1) at a position on one side of one of the gas filtering and cleaning mechanisms (2), a centrifugal fan (4) is fixedly installed at one end of the fixing plate (3), a dust filtering frame (5) is symmetrically installed inside the ventilation frame (1), a filter screen (6) is snap-fitted inside the dust filtering frame (5), and a gas filtering and drainage component (7) is installed outside the air inlet port of the centrifugal fan (4); The gas filtering and drainage assembly (7) comprises a drainage pipe (71) fixedly mounted on the outside of the air inlet port of the centrifugal fan (4); a bellows (72) is fixedly mounted on one end of the drainage pipe (71); a guide cover (73) is mounted on one end of the bellows (72); a mounting block (74) is integrally formed at the top of the guide cover (73); a screw rod (75) is threadedly connected to the inside of the ventilation frame (1); a transverse plate (78) is clamped and mounted on the top of the guide cover (73); a rectangular frame (79) is clamped and mounted on the bottom end of the transverse plate (78) at a position between the two dust filtering frames (5); and a drainage frame (710) is clamped and mounted on the edge of the bottom end of the transverse plate (78).

2. The gas filtering and cleaning mechanism of a purification type centrifugal fan according to claim 1, characterized in that: The screw rod (75) is rotatably connected to the inside of the ventilation frame (1); a belt structure (76) is fixedly mounted on the outside of the screw rod (75); a motor (77) is mounted on the bottom end of the belt structure (76); the motor (77) is fixedly mounted at the bottom end of the inner wall of the ventilation frame (1); the belt structure (76) is composed of two pulleys and a belt, one of which is fixedly mounted on the outside of the screw rod (75) and the other is fixedly mounted on the outside of the output shaft of the motor (77).

3. The gas filtering and cleaning mechanism of a purification type centrifugal fan according to claim 2, characterized in that: The drainage frame (710) is symmetrically provided with mounting bars (711), one end of the mounting bar (711) is fixedly provided with a gas barrier cloth (712), one end of the gas barrier cloth (712) is fixedly provided with a moving bar (713), and the moving bar (713) is slidably connected to the inside of the ventilation frame (1).

4. The gas filtering and cleaning mechanism of a purification type centrifugal fan according to claim 3, characterized in that: A connecting rope (714) is fixedly mounted on one end of the moving bar (713), a base (715) is fixedly mounted on the bottom end of the connecting rope (714), the base (715) is slidably connected to the inside of the ventilation frame (1), a spring column (716) is clamped and mounted on the top end of the base (715), and the top end of the spring column (716) is fixedly mounted on the inner wall of the ventilation frame (1).

5. The gas filtering and cleaning mechanism of a purification type centrifugal fan according to claim 4, characterized in that: The inner wall of the ventilation frame (1) is rotatably connected to a guide column (718) at a position outside the gas barrier cloth (712), and the inner wall of the ventilation frame (1) is rotatably installed to a guide block (717) at a folded corner of the connecting rope (714).

6. The gas filtering and cleaning mechanism of a purification type centrifugal fan according to claim 2, characterized in that: The top of the dust filter frame (5) is provided with a placement groove, and the horizontal plate (78) is located inside the placement groove.

7. The gas filtering and cleaning mechanism of a purification type centrifugal fan according to claim 2, characterized in that: An indirect pushing assembly (8) is symmetrically mounted on both sides of the rectangular frame (79), and the indirect pushing assembly (8) comprises vertical bars (88) fixedly mounted on the two side surfaces of the rectangular frame (79), and spring rods (89) are symmetrically embedded and mounted on both end surfaces of the vertical bars (88), and a same pushing plate (810) is fixedly mounted between the two spring rods (89), and an inclined plate (811) is fixedly mounted on one end edge of the pushing plate (810).

8. The gas filtering and cleaning mechanism of a purification type centrifugal fan according to claim 1, characterized in that: A rack (81) is installed at the top of the inner wall of the ventilation frame (1); the bottom end of the rack (81) is meshedly connected to two gears (82); one end of the gear (82) is rotatably connected to an L-shaped support rod (83); the L-shaped support rod (83) is fixedly installed on the top of the rectangular frame (79); one end of the gear (82) is fixedly installed to a cam (84); the bottom end of the cam (84) is rotatably connected to a connecting rod (85); the bottom end of the connecting rod (85) is rotatably connected to a movable rod (86); the bottom end of the movable rod (86) is welded to an extrusion block (87).

9. The gas filtering and cleaning mechanism of a purification type centrifugal fan according to claim 8, characterized in that: The movable rod (86) is slidably connected to the inside of the rectangular frame (79), and the bottom end of the extrusion block (87) and the top end of the push plate (810) are in contact with each other.

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