A filter screen replacement device for a make-up air port filter device and a method of operation

Abstract

The application discloses a filter screen replacing device of a supplementary air port filtering device, which comprises a supplementary air pipeline with a rectangular cross section, a supplementary air channel in the supplementary air pipeline, a pipeline horizontal section of the supplementary air pipeline close to the supplementary air port, a filter screen frame clamping groove arranged along the contour on the inner side of the supplementary air port, a filter screen frame clampingly arranged in the filter screen frame clamping groove, and filter screens in the enclosed range of each filter screen frame.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of filter screen replacement. BACKGROUND

[0002] In industrial sandblasting operation, in order to ensure the safety and cleanliness of the operation environment, the sandblasting room needs to constantly supplement fresh air. During use, the filter screen will gradually be clogged with dust over time, affecting the gas passability of the air supplement pipeline, so the filter screen needs to be replaced at intervals. The existing air supplement opening filter device cannot realize automatic replacement, and also has problems such as inconvenient disassembly and complex installation. SUMMARY

[0003] The present application provides a filter screen replacement device and working method for an air supplement opening filter device to realize automatic replacement of the filter screen of the air supplement pipeline.

[0004] Technical scheme: In order to achieve the above-mentioned purpose, the filter screen replacement device of the air supplement opening filter device of the present application comprises an air supplement pipeline with a rectangular cross section, the air supplement pipeline is an air supplement channel, and a section of the air supplement pipeline close to the air supplement opening is a pipeline horizontal section. A filter screen frame clamping groove is arranged along the contour on the inner side of the air supplement opening. A filter screen frame is clamped in the filter screen frame clamping groove. The enclosed range of each filter screen frame is a filter screen.

[0005] The filter screen frame clamping groove is through from top to bottom, and a filter screen frame supporting unit is arranged on both sides of the lower end of the filter screen frame clamping groove. The filter screen frame supporting unit supports the filter screen frame clamped in the filter screen frame clamping groove upwards, so that the filter screen frame in the working state cannot slide out from the lower end of the filter screen frame clamping groove which is through from top to bottom.

[0006] When a new filter screen frame forcibly presses the upper end of the filter screen frame clamped in the filter screen frame clamping groove downwards, the filter screen frame clamped in the filter screen frame clamping groove slides out from the lower end of the filter screen frame clamping groove under the action of external force and overcomes the supporting force of the filter screen frame supporting unit.

[0007] Further, the cross section of the air supplement pipeline is rectangular.

[0008] Further, a new filter screen storage box body is fixedly arranged on the upper side of the pipeline horizontal section. The new filter screen storage box body is a new filter screen frame stacking groove. The two end walls of the new filter screen frame stacking groove are an a end wall and a b end wall. A push plate is arranged in parallel between the a end wall and the b end wall. A plurality of filter screen frames are transversely stacked between the push plate and the b end wall, and a filter screen frame stack is formed. A guide rod is perpendicularly connected to the side of the push plate away from the filter screen frame stack, and the guide rod is guided to pass through a guide hole on the a end wall. A push spring is sleeved on a section of the guide rod between the push plate and the a end wall. The push pressure of the push plate formed by the push spring makes the plurality of filter screen frames on the filter screen frame stack abut against each other.

[0009] The filter screen frame closest to the b end wall in the filter screen frame stack is aligned with the filter screen frame embedded in the filter screen frame embedding slot.

[0010] Further, the upper side of the filter screen frame closest to the b end wall in the filter screen frame stack is provided with a transverse lifting push bar, which can push the filter screen frame closest to the b end wall in the filter screen frame stack downward.

[0011] Further, the filter screen frame supporting unit comprises a supporting wheel, a swing arm and a bearing seat.

[0012] The supporting wheel is below the filter screen frame embedding slot, the axis of the supporting wheel is parallel to the air inlet direction of the air inlet, and the wheel width of the supporting wheel is greater than the thickness of the filter screen frame; the supporting wheel is rotatably installed on a wheel shaft through a bearing, and the obliquely lower end of the swing arm is vertically fixedly connected to the wheel shaft; the upper end of the swing arm is vertically fixedly connected to a swing arm shaft parallel to the wheel shaft, the swing arm shaft is rotatably installed on the bearing seat through a bearing, and the bearing seat is fixedly arranged on the lower side wall of the pipeline horizontal section; the swing arm shaft is further provided with a torsion spring for exerting a torsion force on the swing arm shaft, the torsion force of the torsion spring on the swing arm shaft tends to make the swing arm swing upward around the swing arm shaft, so that the supporting wheel rolls and presses the lower surface of the filter screen frame embedded in the filter screen frame embedding slot, and the supporting wheel upwardly supports the lower surface of the filter screen frame embedded in the filter screen frame embedding slot, and the lower surface of the filter screen frame embedded in the filter screen frame embedding slot is parallel to the lower surface of the pipeline horizontal section under the upward supporting force of the supporting wheel.

[0013] Further, a motor is fixedly installed on one side of the lower part of the pipeline horizontal section through a motor support, and the output end of the motor is drivingly connected with a friction wheel; the axis of the friction wheel is parallel to the supporting wheel.

[0014] When the transverse lifting push bar forcibly pushes the filter screen frame closest to the b end wall in the filter screen frame stack downward, the filter screen frame closest to the b end wall in the filter screen frame stack forcibly pushes the filter screen frame embedded in the filter screen frame embedding slot downward, so that the lower end surface of the filter screen frame embedded in the filter screen frame embedding slot pushes the supporting wheel downward, and the swing arm is adaptively swung downward, and from the motion relationship, the supporting wheel gradually deviates laterally from the position directly below the filter screen frame during the descending process, until the supporting wheel is separated from the bottom surface of the filter screen frame, and is changed to rollingly engage the frame side surface of the filter screen frame, and the torsion spring accumulates a stronger restoring torque during the above process; when the supporting wheel rollingly engages the frame side surface of the filter screen frame sliding out of the filter screen frame embedding slot, the supporting wheel is in close tangential rolling with the friction wheel.

[0015] Further, the outer periphery of the friction wheel has a circle of rubber wheel surface.

[0016] Furthermore, a method for replacing the filter screen of an air supply vent filter device involves a horizontal lifting pusher forcefully pushing downwards the new filter screen frame closest to end wall b in the filter screen frame stack until the support roller disengages from the bottom surface of the old filter screen frame and becomes rollingly engaged with the side surface of the old filter screen frame. At this point, the previously idle support roller and friction wheel are tightly rolling and tangential. Immediately, the motor is controlled to make the friction wheel drive the support roller to rotate rapidly. Subsequently, after the new filter screen frame is fully inserted into the filter screen frame locking groove, the lifting device drives the horizontal lifting pusher to rise to the initial position.

[0017] Beneficial effects: This invention enables automatic replacement of the filter screen in the air supply duct. Through the close cooperation of the lifting device and the friction wheel, the old filter screen frame is automatically replaced with a new one. The process is simple, fast, and highly consistent, without affecting the continuity of duct ventilation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the filter frame and filter structure;

[0019] Figure 2 This is a schematic diagram of the overall device;

[0020] Figure 3 for Figure 2 An enlarged view of mark 7;

[0021] Figure 4 for Figure 2 A sectional view;

[0022] Figure 5 Diagram showing how to replace the filter frame;

[0023] Figure 6 for Figure 4 The diagram is based on the original image with all filter frames removed. Detailed Implementation

[0024] The invention will now be further described with reference to the accompanying drawings.

[0025] As attached Figures 1 to 6 The filter replacement device of the air inlet filter shown is as follows: Figure 2 It includes a rectangular air supply duct 1, an air supply channel 26 inside the air supply duct 1, a horizontal section 8 of the air supply duct 1 near the air supply port 5, a filter frame slot 25 is provided along the outline inside the air supply port 5, a filter frame 23 is installed in the filter frame slot 25, and a filter screen 6 is enclosed within the area of ​​each filter frame 23.

[0026] In order to achieve the function of replacement, the filter screen frame clamping groove 25 is designed to be through from top to bottom. Once designed to be through, the filter screen frame 23 clamped in the filter screen frame clamping groove 25 will gradually slide out under the action of factors such as fan vibration, gravity and other comprehensive disturbances, thereby causing the filter screen frame to slide down and fall off. Therefore, the following design is made:

[0027] As Figure 2 , the filter screen frame clamping groove 25 is designed to be through from top to bottom. Once designed to be through, the filter screen frame 23 clamped in the filter screen frame clamping groove 25 will gradually slide out under the action of factors such as fan vibration, gravity and other comprehensive disturbances, thereby causing the filter screen frame to slide down and fall off. Therefore, the following design is made:

[0028] As Figure 4 , 5 , 6; the upper side of the pipeline horizontal section 8 is fixedly provided with a new filter screen storage box 2; the new filter screen storage box 2 is internally provided with a new filter screen frame stacking groove 3, the two end walls of the new filter screen frame stacking groove 3 are respectively an a end wall 2a and a b end wall 2b, a push plate 22 is arranged in parallel between the a end wall 2a and the b end wall 2b, a plurality of filter screen frames 23 are transversely stacked between the push plate 22 and the b end wall 2b, and a filter screen frame stack 23a is formed, a guide rod 21 is perpendicularly connected to the side of the push plate 22 away from the filter screen frame stack 23a, and the guide rod 21 is guided to pass through a guide hole in the a end wall 2a; a push spring 19 is sleeved on a section of the guide rod 21 between the push plate 22 and the a end wall 2a, and the push force of the push spring 19 on the push plate 22 makes the plurality of filter screen frames 23 in the filter screen frame stack 23a abut each other, and each filter screen frame 23 is internally provided with a piece of new filter screen 6.

[0029] The piece of filter screen frame 23 closest to the b end wall 2b in the filter screen frame stack 23a is aligned with the piece of filter screen frame 23 clamped in the filter screen frame clamping groove 25; the upper side of the piece of filter screen frame 23 closest to the b end wall 2b in the filter screen frame stack 23a is provided with a transversely lifting push strip 24, and the transversely lifting push strip 24 can push the piece of filter screen frame 23 closest to the b end wall 2b in the filter screen frame stack 23a downward;

[0030] As Figure 4 , the side of the transversely lifting push strip 24 close to the a end wall 2a is provided with a fixed beam 27 in parallel, and the two ends of the fixed beam 27 are fixed to the upper sides of the two sides of the new filter screen storage box 2; the upper side of the end of the new filter screen storage box 2 close to the b end wall 2b is fixedly provided with a gantry 4, the gantry 4 is installed with a lifting device 28, and the lifting device 28 can drive the transversely lifting push strip 24 to lift up and down.

[0031] As Figure 3 , the filter screen frame bearing unit 7 comprises a bearing wheel 15, a swing arm 9 and a bearing seat 10;

[0032] The bearing wheel 15 is below the filter screen frame snap-in groove 25, the axis of the bearing wheel 15 is parallel to the air inlet direction of the air inlet 5, the wheel width of the bearing wheel 15 is greater than the thickness of the filter screen frame 23; the bearing wheel 15 is rotatably installed on the wheel shaft 17 through the bearing 18, the wheel shaft 17 is vertically fixedly connected to the obliquely lower end of the swing arm 9; the swing arm 9 is vertically fixedly connected to the swing arm shaft 11 which is parallel to the wheel shaft 17, the swing arm shaft 11 is rotatably installed on the bearing seat 10 through the bearing, and the bearing seat 10 is fixedly arranged on the lower sidewall of the pipeline horizontal section 8; a torsion spring 16 is further arranged to apply a torsion force to the swing arm shaft 11, the torsion force of the torsion spring 16 tends to make the swing arm 9 swing upward around the swing arm shaft 11, so that the bearing wheel 15 is in rolling abutment with the lower surface of the pipeline horizontal section 8, and the bearing wheel 15 bears upward the lower surface of the filter screen frame 23 which is snap-fitted in the filter screen frame snap-in groove 25, and under the upward bearing force of the bearing wheel 15, the lower surface of the filter screen frame 23 which is snap-fitted in the filter screen frame snap-in groove 25 is flush with the lower surface of the pipeline horizontal section 8. One side of the lower part of the pipeline horizontal section 8 is fixedly installed with a motor 13 through a motor support 12, and the output end of the motor 13 is drivingly connected with a friction wheel 14; the outer periphery of the friction wheel 14 has a circle of rubber wheel surface; the axis of the friction wheel 14 is parallel to the bearing wheel 15.

[0033] When the transverse lifting push strip 24 forcibly pushes the filter screen frame 23 closest to the b end wall 2b in the filter screen frame stack 23a downward, the filter screen frame 23 closest to the b end wall 2b in the filter screen frame stack 23a forcibly pushes the filter screen frame 23 snap-fitted in the filter screen frame snap-in groove 25 downward, so that the lower end surface of the filter screen frame 23 snap-fitted in the filter screen frame snap-in groove 25 pushes the bearing wheel 15 downward, forcing the swing arm 9 to adaptively swing downward, and from the motion relationship, it can be seen that the bearing wheel 15 gradually deviates laterally from directly below the filter screen frame 23 during the descending process, until the bearing wheel 15 is separated from the bottom surface of the filter screen frame 23, and is changed to rolling abutment with the frame side surface 23.1 of the filter screen frame 23, and the torsion spring 16 stores a stronger restoring torque during the above process; when the bearing wheel 15 is in rolling abutment with the frame side surface 23.1 of the filter screen frame 23 which slides out of the filter screen frame snap-in groove 25 downward, the bearing wheel 15 is just in close rolling tangency with the friction wheel 14.

[0034] Working method and working principle: in working state, a filter screen frame 23 is clamped in the filter screen frame clamping groove 25, and the supporting wheel 15 of the filter screen frame supporting unit 7 is supported upward by the torsion spring 16 to support the filter screen frame 23 clamped in the filter screen frame clamping groove 25, so that the filter screen frame 23 in working state cannot slide out from the lower end of the filter screen frame clamping groove 25 which is through from top to bottom even under the action of vibration and gravity, and under the upward supporting force of the supporting wheel 15, the lower surface of the filter screen frame 23 clamped in the filter screen frame clamping groove 25 is flush with the lower surface of the pipeline horizontal section 8, as shown in Figure a of the drawings, so that the alignment effect is realized, and since the filter screen frame 23 is a filter screen 6, the air flowing through the air supplement pipeline 1 will be filtered once; with the passage of time, the filter screen 6 in the filter screen frame 23 will be gradually blocked by dust, thereby affecting the gas passing property of the air supplement pipeline 1, so it is necessary to replace the filter screen at intervals; Figure 5

[0035] Automatic replacement of a piece of filter screen:

[0036] The lifting device 28 drives the horizontal lifting push bar 24 to forcibly push a new filter screen frame 23 closest to the b end wall 2b in the filter screen frame stack 23a, and the new filter screen frame 23 closest to the b end wall 2b in the filter screen frame stack 23a forcibly pushes down an old filter screen frame 23 clamped in the filter screen frame clamping groove 25, so that the lower end of the old filter screen frame 23 clamped in the filter screen frame clamping groove 25 pushes down the supporting wheel 15, forcing the swing arm 9 to swing downward adaptively, and from the motion relationship, it can be seen that the supporting wheel 15 gradually deviates laterally from the position directly below the filter screen frame 23 during the descending process, until the supporting wheel 15 is separated from the bottom surface of the old filter screen frame 23 and changes to roll along the frame side surface 23.1 of the old filter screen frame 23, at which time the originally idling supporting wheel 15 is in close rolling tangency with the friction wheel 14, as shown in Figure b of the drawings; at this time, the motor 13 is immediately controlled to drive the friction wheel 14 to rotate rapidly with the supporting wheel 15, and the rapidly rotating supporting wheel 15 drives the old filter screen frame 23 to rapidly displace downward under the action of rolling friction, so that the old filter screen frame 23 rapidly falls into the waste collection barrel below after rapidly disengaging from the filter screen frame clamping groove 25, and when the old filter screen frame 23 has already fallen, the new filter screen frame 23 pushed downward by the horizontal lifting push bar 24 still has not completely inserted into the filter screen frame clamping groove 25 (only a part of it is inserted) because the descending speed of the new filter screen frame 23 pushed downward by the horizontal lifting push bar 24 is obviously slower than the speed of the old filter screen frame 23 rapidly displaced downward under the action of rolling friction of the rapidly rotating supporting wheel 15, Figure 5 Figure 5 ​​As shown in Figure c, after the old filter frame 23 falls, since the new filter frame 23 is not yet fully inserted into the filter frame locking groove 25, the swing arm 9 and the supporting wheel 15 of the filter frame support unit 7 return to their initial positions under the action of the torsion spring 16. Figure 5 As shown in Figure d, the support roller 15 rolls upward again to engage with the lower surface of the horizontal section 8 of the pipe and disengages from the friction roller 14; finally, a new filter frame 23 is fully inserted into the filter frame locking groove 25 under the downward push of the lifting push bar 24, so that a new filter frame 23 is locked in the filter frame locking groove 25. The support roller 15 of the filter frame support unit 7 supports the new filter frame 23 locked in the filter frame locking groove 25 under the action of the torsion spring 16; thus realizing the automatic replacement of the filter. Finally, the lifting device 28 drives the horizontal lifting push bar 24 to rise to the initial position.

[0037] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A filter replacement device for an air supply inlet filter, characterized in that: The air supplement pipeline (1) includes a rectangular cross section, the air supplement pipeline (1) is provided with an air supplement channel (26) inside, a pipeline horizontal section (8) is arranged near an air supplement opening (5), a filter screen frame clamping groove (25) is arranged along the contour inside the air supplement opening (5), the filter screen frame clamping groove (25) is clamped with a filter screen frame (23), and the filter screen frame (23) is arranged in the enclosed range of each filter screen frame (23). The filter screen frame clamping groove (25) is through from top to bottom, filter screen frame supporting units (7) are arranged on both sides of the lower end of the filter screen frame clamping groove (25), the filter screen frame supporting units (7) support the filter screen frame (23) clamped in the filter screen frame clamping groove (25) upwards, and the filter screen frame (23) in the working state cannot slide out from the lower end of the filter screen frame clamping groove (25) which is through from top to bottom. When a new filter screen frame (23) is forced to press the upper end of the filter screen frame (23) in the filter screen frame clamping groove (25) downwards, the filter screen frame (23) in the filter screen frame clamping groove (25) slides out from the lower end of the filter screen frame clamping groove (25) under the action of an external force and against the supporting force of the filter screen frame supporting units (7). The upper side of the pipeline horizontal section (8) is fixedly provided with a new filter screen storage box (2), the new filter screen storage box (2) is provided with a new filter screen frame stacking groove (3) inside, the two end walls of the new filter screen frame stacking groove (3) are an a end wall (2a) and a b end wall (2b), a push plate (22) is arranged in parallel between the a end wall (2a) and the b end wall (2b), a plurality of filter screen frames (23) are transversely stacked between the push plate (22) and the b end wall (2b), and a filter screen frame stack (23a) is formed. The filter screen frame supporting units (7) include a supporting wheel (15), a swing arm (9) and a bearing seat (10). The supporting wheel (15) is below the filter screen frame clamping groove (25), the axis of the supporting wheel (15) is parallel to the air inlet direction of the air supplement opening (5), the wheel width of the supporting wheel (15) is greater than the thickness of the filter screen frame (23), the supporting wheel (15) is rotatably installed on a wheel shaft (17) through a bearing (18), and the obliquely lower end of the swing arm (9) is vertically and fixedly connected with the wheel shaft (17). The upper end of the swing arm (9) is vertically and fixedly connected with a swing arm shaft (11) which is parallel to the wheel shaft (17), the swing arm shaft (11) is rotatably installed on the bearing seat (10) through a bearing, and the bearing seat (10) is fixedly arranged on the lower side wall of the pipeline horizontal section (8). A torsion spring (16) which applies a torsion force to the swing arm shaft (11) is further included. One side of the lower part of the pipeline horizontal section (8) is fixedly provided with a motor (13) through a motor support (12), and the output end of the motor (13) is drivingly connected with a friction wheel (14). The axis of the friction wheel (14) is parallel to the supporting wheel (15).

2. The filter screen replacement device of a supplemental air port filter device of claim 1, wherein: The cross section of the air supplement pipeline (1) is rectangular.

3. A filter screen replacement device for a filter device of a supplementary air port according to claim 2, characterized in that: The push plate (22) is vertically connected with a guide rod (21) on the side far from the filter screen frame stack (23a), the guide rod (21) is guided through the guide hole on the a end wall (2a); the guide rod (21) between the push plate (22) and the a end wall (2a) is sleeved with a push spring (19), the push force of the push plate (22) formed by the push spring (19) makes several filter screen frames (23) on the filter screen frame stack (23a) abut each other; The filter screen frame (23) closest to the b end wall (2b) in the filter screen frame stack (23a) is aligned with the filter screen frame (23) clamped in the filter screen frame clamping groove (25) up and down.

4. The filter screen replacement device of a supplemental air port filter device of claim 3, wherein: The filter screen frame (23) closest to the b end wall (2b) in the filter screen frame stack (23a) is provided with a transverse lifting push strip (24) on the upper side, the transverse lifting push strip (24) can push the filter screen frame (23) closest to the b end wall (2b) in the filter screen frame stack (23a) downward.

5. A filter screen replacement device for a filter device of a supplementary air port according to claim 4, characterized in that: The torsion spring (16) tends to make the swing arm (9) swing upward around the swing arm shaft (11), so that the supporting wheel (15) rolls and presses the lower surface of the pipeline horizontal section (8), and the supporting wheel (15) upwardly supports the lower surface of the filter screen frame (23) clamped in the filter screen frame clamping groove (25), under the upward supporting force of the supporting wheel (15), the lower surface of the filter screen frame (23) clamped in the filter screen frame clamping groove (25) is flush with the lower surface of the pipeline horizontal section (8).

6. A filter screen replacement device for a bypass port filter device according to claim 5, wherein: When the transverse lifting push strip (24) forcibly pushes the filter screen frame (23) closest to the b end wall (2b) in the filter screen frame stack (23a) downward, the filter screen frame (23) closest to the b end wall (2b) in the filter screen frame stack (23a) forcibly pushes the filter screen frame (23) clamped in the filter screen frame clamping groove (25) downward, so that the lower end surface of the filter screen frame (23) clamped in the filter screen frame clamping groove (25) pushes the supporting wheel (15) downward, forcing the swing arm (9) to swing downward adaptively, from the movement relationship, the supporting wheel (15) gradually deviates laterally from directly below the filter screen frame (23) during the descending process, until the supporting wheel (15) is separated from the bottom surface of the filter screen frame (23), and changes to roll along the frame side surface (23.1) of the filter screen frame (23), during the above process, the torsion spring (16) stores stronger restoring torque; when the supporting wheel (15) rolls along the frame side surface (23.1) of the filter screen frame (23) sliding out of the filter screen frame clamping groove (25) downward, the supporting wheel (15) is just tangent to the friction wheel (14) for close rolling.

7. A filter screen replacement device for a filter device of a supplementary air port according to claim 6, characterized in that: The outer periphery of the friction wheel (14) has a circle of rubber wheel surface.

8. The method of claim 7, wherein the method further comprises: providing a filter screen replacement device for the air port filter device; and replacing the filter screen of the air port filter device with the filter screen replacement device. The transverse lifting push bar (24) forces the new filter screen frame (23) closest to the b end wall (2b) in the filter screen frame stack (23a) to move downward until the supporting wheel (15) is separated from the bottom surface of the old filter screen frame (23) and is transformed into rolling along the frame side surface (23.1) of the old filter screen frame (23). At this time, the originally idling supporting wheel (15) is in close rolling tangency with the friction wheel (14), and the motor (13) is immediately controlled to make the friction wheel (14) drive the supporting wheel (15) to rotate rapidly. Subsequently, after the new filter screen frame (23) is completely inserted into the filter screen frame clamping groove (25), the lifting device (28) drives the transverse lifting push bar (24) to rise to the initial position.

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