Filter screen replacing device of air supplementing opening filtering device and working method

Abstract

The filter screen replacing device comprises an air supplementing pipeline with the rectangular section, an air supplementing channel is formed in the air supplementing pipeline, the section, close to an air supplementing opening, of the air supplementing pipeline is a pipeline horizontal section, a filter screen frame clamping and embedding groove is formed in the inner side of the air supplementing opening along the outline, and a filter screen frame is clamped and embedded in the filter screen frame clamping and embedding groove; a filter screen is arranged in the enclosed range of each filter screen frame; according to the invention, the filter screen of the air supplement pipeline can be automatically replaced.

Description

Technical Field

[0001] The invention belongs to the field of filter screen replacement. Background Art

[0002] In industrial sandblasting operations, in order to ensure the safety and cleanliness of the working environment, the sandblasting room needs to be constantly replenished with fresh air. During the use of the filter, as time goes by, the filter will gradually be clogged with dust, thereby affecting the gas permeability of the air supply pipe. Therefore, the filter needs to be replaced at intervals; the existing air supply port filter device not only cannot achieve automatic replacement, but also has problems such as inconvenient disassembly and complicated installation. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a filter replacement device and a working method for an air supply port filter device to achieve automatic replacement of the filter screen of the air supply duct.

[0004] Technical solution: To achieve the above-mentioned purpose, a filter screen replacement device of an air supply port filter device of the present invention comprises an air supply duct with a rectangular cross section, the air supply duct is an air supply channel, a section of the air supply duct close to the air supply port is a horizontal section of the duct, a filter screen frame card embedding groove is arranged along the contour of the inner side of the air supply port, a filter screen frame is card embedded in the filter screen frame card embedding groove, and a filter screen is arranged within the enclosed range of each filter screen frame;

[0005] The filter frame card embedding groove is through-connected from top to bottom, and filter frame supporting units are arranged on both sides of the lower end of the filter frame card embedding groove, and the filter frame supporting units upwardly support the filter frame embedded in the filter frame card embedding groove, so that the filter frame in the working state cannot slide out from the lower end of the filter frame card embedding groove that is through-connected from top to bottom;

[0006] When a new filter frame is forced downward to press the upper end of the filter frame in the filter frame clamping groove, the filter frame in the filter frame clamping groove overcomes the supporting force of the filter frame supporting unit under the action of external force and slides out from the lower end of the filter frame clamping groove.

[0007] Furthermore, the cross-section of the air supply duct is rectangular.

[0008] Furthermore, a new filter storage box is fixedly provided on the upper side of the horizontal section of the pipeline; the new filter storage box is a new filter frame stacking groove, and the two end walls of the new filter frame stacking groove are respectively end wall a and end wall b, and a push plate is arranged in parallel between end wall a and end wall b, and a plurality of filter frames are stacked transversely between the push plate and end wall b to form a filter frame stack, and a guide rod is vertically connected to the side of the push plate away from the filter frame stack, and the guide rod guides through the guide hole on end wall a; a section of the guide rod between the push plate and end wall a is sheathed with a push spring, and the push force formed by the push spring on the push plate makes the plurality of filter frames on the filter frame stack close to each other;

[0009] A filter frame in the filter frame stack that is closest to the end wall b is aligned vertically with a filter frame that is embedded in the filter frame embedding groove.

[0010] Furthermore, a lateral lifting push bar is arranged on the upper side of a filter frame in the filter frame stack that is closest to the b end wall, and the lateral lifting push bar can push downward the filter frame in the filter frame stack that is closest to the b end wall.

[0011] Further, the filter frame supporting unit includes a supporting wheel, a swing arm and a bearing seat;

[0012] The supporting wheel is below the embedded groove of the filter frame, the axis of the supporting wheel is parallel to the air inlet direction of the air supply port, and the wheel width of the supporting wheel is greater than the thickness of the filter frame; the supporting wheel is rotatably mounted on the wheel axle through a bearing, and the oblique lower end of the swing arm is vertically fixedly connected to the wheel axle; the upper end of the swing arm is vertically fixedly connected to a swing arm shaft parallel to the wheel axle, and the swing arm shaft is rotatably mounted on a bearing seat through a bearing, and the bearing seat is fixedly arranged on the lower side wall of the horizontal section of the pipeline; it also includes a torsion spring that applies torsion to the swing arm shaft, and the torsion force of the torsion spring on the swing arm shaft tends to cause the swing arm to have an upward swinging tendency around the swing arm shaft, thereby causing the supporting wheel to roll and press against the lower surface of the horizontal section of the pipeline, and the supporting wheel upwardly supports the lower surface of the filter frame embedded in the embedded groove of the filter frame, and under the upward supporting force of the supporting wheel, the lower surface of the filter frame embedded in the embedded groove of the filter frame is flush with the lower surface of the horizontal section of the pipeline.

[0013] Furthermore, a motor is fixedly mounted on one side of the lower part of the horizontal section of the pipeline through a motor bracket, and a friction wheel is driven and connected to the output end of the motor; the axis of the friction wheel is parallel to the supporting wheel;

[0014] When the lateral lifting push bar pushes the filter frame closest to the b end wall in the filter frame stack downward, the filter frame closest to the b end wall in the filter frame stack pushes the filter frame stuck in the filter frame stuck groove downward, so that the lower end surface of the filter frame stuck in the filter frame stuck groove pushes the supporting wheel downward, forcing the swing arm to swing downward adaptively. From the motion relationship, it can be seen that the supporting wheel gradually deviates laterally from the bottom of the filter frame during the descent process until the supporting wheel is separated from the bottom surface of the filter frame and turns into a rolling match with the frame side of the filter frame. In the above process, the torsion spring accumulates a stronger restoring torque; when the supporting wheel rolls and slides out of the filter frame stuck groove from the frame side of the filter frame, the supporting wheel just rolls closely tangent to the friction wheel.

[0015] Furthermore, the outer circumference of the friction wheel is provided with a circle of rubber wheel surface.

[0016] Furthermore, a method for replacing the filter screen replacement device of the air supply port filter device is provided, wherein the lateral lifting and pushing strip forces a new filter screen frame in the filter screen frame stack that is closest to the b end wall downward until the supporting wheel is separated from the bottom surface of the old filter screen frame and changes to a rolling fit with the frame side surface of the old filter screen frame. At this time, the originally idling supporting wheel and the friction wheel are tightly rolled and tangent, and the motor is immediately controlled to make the friction wheel drive the supporting wheel to rotate rapidly, and then a new filter screen frame is completely inserted into the filter screen frame card slot, and the lifting device drives the lateral lifting and pushing strip to rise to the initial position.

[0017] Beneficial effect: The present invention can realize automatic replacement of the filter screen of the air supply duct. Through the close cooperation of the lifting device and the friction wheel, the old filter screen frame can be automatically replaced with a new filter screen frame. The process is simple and rapid with high consistency and does not affect the continuity of duct ventilation. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0020] Figure 3 for Figure 2 An enlarged schematic diagram of the mark 7;

[0021] Figure 4 for Figure 2 A cross-sectional view of

[0022] Figure 5 This is a schematic diagram of filter frame replacement;

[0023] Figure 6 for Figure 4 The schematic diagram below shows the filter frame without all filters. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] As attached Figures 1 to 6 A filter screen replacement device for an air supply vent filter device as shown in Figure 2 , including a supply air duct 1 with a rectangular cross-section, the supply air duct 1 is an supply air channel 26, a section of the supply air duct 1 close to the supply air port 5 is a horizontal section 8 of the duct, a filter frame card groove 25 is arranged along the contour of the inner side of the supply air port 5, a filter frame 23 is card-embedded in the filter frame card groove 25, and a filter 6 is arranged within the enclosed range of each filter frame 23.

[0026] In order to achieve the function of replacement, the filter frame card slot 25 is designed to be through-through in structure. Once designed to be through-through, the filter frame 23 embedded in the filter frame card slot 25 will gradually slide downward under the influence of factors such as the vibration of the fan and the comprehensive disturbance of gravity, thereby causing the filter frame to slide downward and fall off; therefore, the following design is made:

[0027] like Figure 2 , filter frame supporting units 7 are provided on both sides of the lower end of the filter frame card slot 25, and the filter frame supporting units 7 upwardly support the filter frame 23 embedded in the filter frame card slot 25, so that the filter frame 23 in the working state cannot slide out from the lower end of the filter frame card slot 25 that passes through from top to bottom; when a new filter frame 23 is forced to press downward against the upper end of the filter frame 23 in the filter frame card slot 25, the filter frame 23 in the filter frame card slot 25 overcomes the supporting force of the filter frame supporting unit 7 under the action of external force and slides out from the lower end of the filter frame card slot 25.

[0028] like Figure 4 , 5 , 6; a new filter storage box 2 is fixedly provided on the upper side of the horizontal section 8 of the pipeline; a new filter frame stacking groove 3 is provided in the new filter storage box 2, and the two end walls of the new filter 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, and a plurality of filter frames 23 are stacked horizontally between the push plate 22 and the b end wall 2b to form a filter frame pile 23a, and a guide rod 21 is vertically connected to the side of the push plate 22 away from the filter frame pile 23a, and the guide rod 21 guides through the guide hole on the a end wall 2a; a section of the guide rod 21 between the push plate 22 and the a end wall 2a is sheathed with a push spring 19, and the pushing force formed by the push spring 19 on the push plate 22 makes the plurality of filter frames 23 on the filter frame pile 23a close to each other, and each filter frame 23 contains a new filter 6.

[0029] The filter frame 23 closest to the b end wall 2b in the filter frame stack 23a is aligned vertically with the filter frame 23 embedded in the filter frame embedding groove 25; the upper side of the filter frame 23 closest to the b end wall 2b in the filter frame stack 23a is provided with a transverse lifting push bar 24, which can push downward the filter frame 23 closest to the b end wall 2b in the filter frame stack 23a;

[0030] like Figure 4 A fixed beam 27 is arranged parallel to the side of the transverse lifting push strip 24 close to the a end wall 2a, and the two ends of the fixed beam 27 are fixed to the two sides of the upper end of the new filter storage box 2; a gantry 4 is fixedly arranged on the upper side of one end of the new filter storage box 2 close to the b end wall 2b, and a lifting device 28 is installed on the gantry 4, which can drive the transverse lifting push strip 24 to move up and down.

[0031] like Figure 3 , the filter frame supporting unit 7 includes a supporting wheel 15, a swing arm 9 and a bearing seat 10;

[0032] The supporting wheel 15 is below the filter frame card slot 25, the axis of the supporting wheel 15 is parallel to the air inlet direction of the air supply port 5, and the wheel width of the supporting wheel 15 is greater than the thickness of the filter frame 23; the supporting wheel 15 is rotatably mounted on the wheel shaft 17 through the bearing 18, and the lower oblique end of the swing arm 9 is vertically fixedly connected to the wheel shaft 17; the upper end of the swing arm 9 is vertically fixedly connected to the swing arm shaft 11 parallel to the wheel shaft 17, and the swing arm shaft 11 is rotatably mounted on the bearing seat 10 through the bearing, and the bearing seat 10 is fixedly arranged on the lower side wall of the horizontal section 8 of the pipeline; it also includes The torsion spring 16 exerts torsion force on the swing arm shaft 11. The torsion force of the torsion spring 16 on the swing arm shaft 11 tends to make the swing arm 9 have a tendency to swing upward around the swing arm shaft 11, so that the supporting wheel 15 rolls and presses against the lower surface of the horizontal section 8 of the pipeline, and the supporting wheel 15 upwardly supports the lower surface of the filter frame 23 embedded in the filter frame embedded groove 25. Under the upward supporting force of the supporting wheel 15, the lower surface of the filter frame 23 embedded in the filter frame embedded groove 25 is flush with the lower surface of the horizontal section 8 of the pipeline. A motor 13 is fixedly installed on one side of the lower part of the horizontal section 8 of the pipeline through a motor bracket 12, and the output end of the motor 13 is drivingly connected to 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 supporting wheel 15.

[0033] When the lateral lifting push strip 24 forcibly pushes the filter frame 23 closest to the b end wall 2b in the filter frame stack 23a downward, the filter frame 23 closest to the b end wall 2b in the filter frame stack 23a forces the filter frame 23 embedded in the filter frame embedding groove 25 to be pushed downward, so that the lower end surface of the filter frame 23 embedded in the filter frame embedding groove 25 pushes the supporting wheel 15 downward, forcing the swing arm 9 to swing downward adaptively. From the motion relationship, it can be seen that the supporting wheel 15 gradually deviates laterally from the bottom of the filter frame 23 during the descent process until the supporting wheel 15 breaks away from the bottom surface of the filter frame 23 and turns into a frame side 23.1 of the filter frame 23 in a rolling manner. In the above process, the torsion spring 16 accumulates a stronger restoring torque; when the supporting wheel 15 rolls and cooperates to slide out a frame side 23.1 of the filter frame 23 from the filter frame embedding groove 25, the supporting wheel 15 just rolls tangent to the friction wheel 14.

[0034] Working method and working principle: In the working state, a filter frame 23 is embedded in the filter frame embedding groove 25, and the supporting wheel 15 of the filter frame supporting unit 7 upwardly supports the filter frame 23 embedded in the filter frame embedding groove 25 under the action of the torsion spring 16, so that the filter frame 23 in the working state cannot slide out from the lower end of the filter frame embedding groove 25 that runs through the top and 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 frame 23 embedded in the filter frame embedding groove 25 is flush with the lower surface of the horizontal section 8 of the pipeline, such as Figure 5 As shown in FIG. a, the alignment effect is achieved. Since the filter screen frame 23 contains the filter screen 6, the air flowing through the air supply duct 1 will be filtered once. As time goes by, the filter screen 6 in the filter screen frame 23 will gradually be clogged with dust, thereby affecting the gas permeability of the air supply duct 1. Therefore, the filter screen needs to be replaced at a certain interval.

[0035] The process of automatically replacing a filter:

[0036] The lifting device 28 drives the lateral lifting push bar 24 to forcefully push a new filter frame 23 in the filter frame stack 23a that is closest to the b end wall 2b downward. The new filter frame 23 in the filter frame stack 23a that is closest to the b end wall 2b forces the old filter frame 23 embedded in the filter frame embedding groove 25 to be pushed downward, so that the lower end surface of the old filter frame 23 embedded in the filter frame embedding groove 25 pushes the supporting wheel 15 downward, forcing the swing arm 9 to swing downward adaptively. From the motion relationship, it can be seen that the supporting wheel 15 gradually deviates laterally from the bottom of the filter frame 23 during the descent process, until the supporting wheel 15 breaks away from the bottom surface of the old filter frame 23 and transforms into a rolling match with the frame side 23.1 of the old filter frame 23. At this time, the originally idling supporting wheel 15 and the friction wheel 14 are tightly rolled and tangent, as shown in FIG. Figure 5 As shown in Figure b; at this time, the motor 13 is immediately controlled to make the friction wheel 14 drive the supporting wheel 15 to rotate rapidly. The rapidly rotating supporting wheel 15 drives the old filter frame 23 to move downward rapidly under the action of the rolling friction force, so that the old filter frame 23 quickly moves downward out of the filter frame card embedding groove 25 and falls into the waste collection bucket below. When the old filter frame 23 has fallen, the lateral lifting and pushing strips 24 push the new filter frame 23 downward to move downward at a speed significantly slower than the speed at which the rapidly rotating supporting wheel 15 drives the old filter frame 23 to move downward rapidly under the action of the rolling friction force. Therefore, the new filter frame 23 pushed downward by the lateral lifting and pushing strips 24 has not yet been completely inserted downward into the filter frame card embedding groove 25 (only a part of it has been inserted). Figure 5As shown in FIG. c, after the old filter frame 23 falls, since the new filter frame 23 is still not completely inserted into the filter frame card slot 25, the swing arm 9 and the supporting wheel 15 of the filter frame supporting unit 7 return to the initial position under the action of the torsion spring 16, as shown in FIG. Figure 5 As shown in Figure d, the supporting wheel 15 rolls upward again to cooperate with the lower surface of the horizontal section 8 of the pipeline and disengages from the friction wheel 14; finally, a new filter frame 23 is completely inserted downward into the filter frame card slot 25 under the downward push of the lifting push bar 24, so that a new filter frame 23 is embedded in the filter frame card slot 25, and the supporting wheel 15 of the filter frame supporting unit 7 supports the new filter frame 23 embedded in the filter frame card slot 25 upward under the action of the torsion spring 16; thereby realizing the automatic replacement of the filter, and finally the lifting device 28 drives the horizontal lifting push bar 24 to rise to the initial position.

[0037] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A filter screen replacement device for an air supply vent filter device, characterized in that: The invention comprises an air supply duct (1) with a rectangular cross section, wherein the air supply duct (1) contains an air supply channel (26), wherein a section of the air supply duct (1) close to the air supply port (5) is a duct horizontal section (8), wherein a filter frame snap-in groove (25) is arranged along the contour of the inner side of the air supply port (5), wherein a filter frame (23) is snap-in arranged in the filter frame snap-in groove (25), and within the enclosed range of each filter frame (23) is a filter screen (6); The filter frame locking groove (25) is connected vertically, and filter frame supporting units (7) are arranged on both sides of the lower end of the filter frame locking groove (25). The filter frame supporting units (7) support the filter frame (23) locked in the filter frame locking groove (25) upwards, so that the filter frame (23) in the working state cannot slide out from the lower end of the filter frame locking groove (25) connected vertically. When a new filter frame (23) is forced downward to press the upper end of the filter frame (23) in the filter frame clamping groove (25), the filter frame (23) in the filter frame clamping groove (25) overcomes the supporting force of the filter frame supporting unit (7) under the action of external force and slides out from the lower end of the filter frame clamping groove (25).

2. The filter screen replacement device of the air supply port filter device according to claim 1, characterized in that: The cross section of the air supply duct (1) is rectangular.

3. The filter screen replacement device of the air supply port filter device according to claim 2, characterized in that: A new filter screen storage box (2) is fixedly arranged on the upper side of the horizontal section (8) of the pipeline; a new filter screen frame stacking groove (3) is arranged inside the new filter screen storage box (2); 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 parallel to the a end wall (2a) and the b end wall (2b); a plurality of filter screen frames (23) are stacked transversely between the push plate (22) and the b end wall (2b), and a filter screen frame stack is formed. (23a), a guide rod (21) is vertically connected to the side of the push plate (22) away from the filter frame stack (23a), and the guide rod (21) is guided through the guide hole on the a end wall (2a); a section of the guide rod (21) between the push plate (22) and the a end wall (2a) is sheathed with a push spring (19), and the push force formed by the push spring (19) on the push plate (22) makes the plurality of filter frames (23) on the filter frame stack (23a) close to each other; A filter frame (23) in the filter frame stack (23a) that is closest to the end wall b (2b) is aligned vertically with a filter frame (23) embedded in the filter frame embedding groove (25).

4. The filter screen replacement device of the air supply port filter device according to claim 3, characterized in that: A transverse lifting push bar (24) is arranged on the upper side of a filter frame (23) in the filter frame stack (23a) that is closest to the b end wall (2b), and the transverse lifting push bar (24) can push downward the filter frame (23) in the filter frame stack (23a) that is closest to the b end wall (2b).

5. The filter screen replacement device of the air supply port filter device according to claim 4, characterized in that: The filter frame supporting unit (7) comprises a supporting wheel (15), a swing arm (9) and a bearing seat (10); The supporting wheel (15) is below the filter frame clamping groove (25), the axis of the supporting wheel (15) is parallel to the air inlet direction of the air supply port (5), and the wheel width of the supporting wheel (15) is greater than the thickness of the filter frame (23); the supporting wheel (15) is rotatably mounted on the wheel shaft (17) through a bearing (18), and the lower oblique end of the swing arm (9) is vertically fixedly connected to the wheel shaft (17); the upper end of the swing arm (9) is vertically fixedly connected to a swing arm shaft (11) parallel to the wheel shaft (17), and the swing arm shaft (11) is rotatably mounted on a bearing seat (10) through a bearing, and the bearing seat (10) is fixedly arranged on the lower side wall of the horizontal section (8) of the pipeline. The invention also includes a torsion spring (16) for applying torsion force to the swing arm shaft (11), wherein the torsion force of the torsion spring (16) on the swing arm shaft (11) causes the swing arm (9) to have a tendency to swing upward around the swing arm shaft (11), thereby causing the supporting wheel (15) to roll and press against the lower surface of the horizontal section (8) of the pipeline, and the supporting wheel (15) upwardly supports the lower surface of the filter frame (23) embedded in the filter frame embedding groove (25), and under the upward supporting force of the supporting wheel (15), the lower surface of the filter frame (23) embedded in the filter frame embedding groove (25) is flush with the lower surface of the horizontal section (8) of the pipeline.

6. The filter screen replacement device of the air supply port filter device according to claim 5, characterized in that: A motor (13) is fixedly mounted on one side of the lower part of the horizontal section (8) of the pipeline via a motor bracket (12); the output end of the motor (13) is drivingly connected to a friction wheel (14); the axis of the friction wheel (14) is parallel to the supporting wheel (15); When the lateral lifting push bar (24) pushes downwardly a filter frame (23) in the filter frame stack (23a) closest to the b end wall (2b), the filter frame (23) in the filter frame stack (23a) closest to the b end wall (2b) pushes downwardly a filter frame (23) stuck in the filter frame stuck groove (25), so that the lower end surface of the filter frame (23) stuck in the filter frame stuck groove (25) pushes the supporting wheel (15) downward, forcing the swing arm (9) to swing downward adaptively, and from the motion relationship It can be seen that during the process of the support wheel (15) descending, it gradually deviates laterally from the bottom of the filter frame (23) until the support wheel (15) is separated from the bottom surface of the filter frame (23) and changes to rolling engagement with the frame side (23.1) of the filter frame (23). During the above process, the torsion spring (16) accumulates a stronger restoring torque; when the support wheel (15) rolls and engages to slide a piece of the frame side (23.1) of the filter frame (23) downward from the filter frame clamping groove (25), the support wheel (15) just rolls closely tangent to the friction wheel (14).

7. The filter screen replacement device of the air supply port filter device according to claim 6, characterized in that: The outer circumference of the friction wheel (14) is provided with a rubber wheel surface.

8. The method for replacing a filter screen replacement device of an air supply port filter device according to claim 7, characterized in that: The transverse lifting push bar (24) forces a new filter frame (23) in the filter frame stack (23a) closest to the end wall b (2b) downward until the supporting wheel (15) is separated from the bottom surface of the old filter frame (23) and changes to rolling to match the frame side (23.1) of the old filter frame (23). At this time, the originally idle supporting wheel (15) and the friction wheel (14) are closely rolled and tangent. The motor (13) is immediately controlled to make the friction wheel (14) drive the supporting wheel (15) to rotate rapidly. Subsequently, the new filter frame (23) is completely inserted into the filter frame clamping groove (25), and the lifting device (28) drives the transverse lifting push bar (24) to rise to the initial position.

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