CN118893047A - A metal flaw detection device for detecting a manipulator - Google Patents

Abstract

The present invention relates to the field of metal flaw detection technology, and in particular to a metal flaw detection device for detecting a manipulator. The metal flaw detection device for detecting a manipulator comprises a collection frame, a fixing assembly, a cleaning mechanism, and a flaw detection mechanism. A support plate is fixedly installed on the top of one side of the collection frame, a fixing assembly for clamping tubular metal is installed on the side wall of the support plate, a cleaning mechanism for wiping dust on the surface of the tubular metal is installed on the inner wall of the collection frame, and a flaw detection mechanism for performing a comprehensive inspection of each position of the cleaned tubular metal is installed on the side wall of the support plate. The metal flaw detection device for detecting a manipulator provided by the present invention has the advantages of being able to clean metal detection parts, and can automatically perform uniform and comprehensive inspection and flaw detection on metal parts, thereby improving the accuracy of detection data.

Description

A metal flaw detection device for detecting a manipulator

Technical Field

The invention relates to the technical field of metal flaw detection, and in particular to a metal flaw detection device for detecting a manipulator.

Background Art

Ultrasonic flaw detection is a method of inspecting part defects by using the characteristic that ultrasound can penetrate deep into metal materials and reflect at the edge of the interface when entering from one section to another. When the ultrasonic beam passes from the surface of the part through the probe into the metal interior, reflected waves are generated when encountering defects and the bottom of the part, forming pulse waveforms on the flaw detection display screen. The defect location and size are determined based on these pulse waveforms.

At present, when performing flaw detection on some tubular metals, workers usually move the detection probe back and forth to the tubular metal for detection. This is very cumbersome and wastes time and manpower. In addition, some tubular metals are placed in the warehouse for a long time. If they are taken out for detection directly, the accuracy of the detection data will be affected due to the accumulation of dust on the metal surface.

Therefore, it is necessary to provide a new metal flaw detection device for detecting a manipulator to solve the above technical problems.

Summary of the invention

In order to solve the above technical problems, the present invention provides a metal flaw detection device for detecting a manipulator, which can clean metal detection parts, and can automatically perform uniform and comprehensive flaw detection on metal parts, thereby improving the accuracy of detection data.

The metal flaw detection device for detecting a manipulator provided by the present invention comprises: a collection frame, a support plate is fixedly installed on the top of one side of the collection frame;

A fixing assembly for clamping the tubular metal is mounted on the side wall of the support plate;

A cleaning mechanism for wiping dust off the surface of the tubular metal is installed on the inner wall of the collection frame;

The flaw detection mechanism, which is used for comprehensively detecting each position of the cleaned tubular metal, is installed on the side wall of the supporting plate.

Preferably, the support plate includes a support frame, a slide plate and a first bolt. The support frame is fixedly connected to the top edge of the collection frame, and the slide plate is slidably connected to the inside of the support frame. A plurality of groups of equidistantly distributed screw holes are provided on the side wall of the slide plate, and a group of first bolts matching the screw holes are threadedly connected to the side wall of the support frame.

Preferably, the fixing assembly includes a rotating rod, a fixing sleeve, a screw and a pressure pad. The rotating rod is rotatably connected to the side wall of the support frame, the fixing sleeve is fixedly connected to the other end of the rotating rod, a plurality of groups of equidistantly distributed screws are threadedly connected to the side wall of the fixing sleeve, and one end of the screw located on the inner side of the fixing sleeve is rotatably connected to a pressure pad.

Preferably, the fixing assembly further comprises a first motor, the first motor is mounted on a side wall of the supporting frame, and the rotating rod is fixedly connected to an output end of the first motor.

Preferably, the cleaning mechanism includes a second motor, a first screw rod, a movable plate, a support rod and an arc pad, the second motor is fixedly connected to an inner wall of one side of the collecting frame, the first screw rod is fixedly connected to an output end of the second motor, a slide groove is provided on the inner bottom wall of the collecting frame, the movable plate is slidably connected to the inside of the slide groove, and the movable plate is also threadedly connected to the rod wall of the first screw rod, support rods are installed on both sides of the movable plate, and an arc pad is fixedly installed on the other end of the support rod.

Preferably, the support rod includes a fixing tube, a connecting tube and a second bolt, one end of the connecting tube is slidably connected to the inside of the fixing tube, the other end of the connecting tube is connected to the arc pad, and the second bolt is threadedly connected to the outer wall of the fixing tube.

Preferably, fans are installed on the side walls at both ends of the movable plate, the fixed cylinder is fixedly connected to the air outlet of the fan, the fixed cylinder, the connecting cylinder and the arc pad are interconnected, and the inner surface of the arc pad is provided with evenly distributed exhaust holes.

Preferably, the flaw detection mechanism includes a third motor, a second screw rod, a slider, a guide rod, a mounting frame and a detection probe, the third motor is fixedly connected to the side wall of the slide, the second screw rod is fixedly connected to the output end of the third motor, the guide rod is also fixedly connected to the side wall of the slide, the slider is threadedly connected to the rod wall of the second screw rod, and the slider is also slidably connected to the guide rod, the mounting frame is fixedly connected to the bottom of the slider, and the detection probe is clamped inside the mounting frame.

Preferably, the mounting frame includes a U-shaped frame, an L-shaped plate and a spring, the U-shaped frame is fixedly connected to the bottom of the slider, two groups of symmetrically arranged L-shaped plates are slidably connected on both sides of the bottom of the U-shaped frame, and a spring is fixedly connected between the side walls of the two groups of L-shaped plates that are close to the top and abut against each other.

Preferably, an ash outlet is provided on the side wall of the collecting frame, and a sealing plate is slidably connected to the inner wall of the ash outlet.

Compared with the related art, the metal flaw detection device for detecting the manipulator provided by the present invention has the following beneficial effects:

1. The present invention first clamps the tubular metal on the support plate through a fixing assembly, and then cleans the outer wall of the tubular metal through a cleaning mechanism, and blows air to the tube wall in conjunction with a fan, thereby further increasing the cleaning speed and facilitating improving the accuracy of the detection data.

2. In the present invention, after the dust and impurities on the surface of the tubular metal are cleaned, the flaw detection mechanism can move back and forth on the outside of the tubular metal and drive the clamped tube body to rotate, so that each position of the outer wall of the tube body can be evenly detected, which not only improves the accuracy of the detection data, but also saves time and manpower.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a preferred embodiment of a metal flaw detection device for detecting a manipulator provided by the present invention;

FIG2 is a schematic structural diagram of the metal flaw detection device for detecting the manipulator shown in FIG1 ;

FIG. 3 is a schematic diagram of the front view structure of the mounting frame shown in FIG. 1 .

Numbers in the figure: 1. collecting frame; 11. slide; 2. support plate; 21. support frame; 22. slide plate; 221. screw hole; 23. first bolt; 3. fixing assembly; 31. rotating rod; 32. fixing sleeve; 33. screw; 34. pressure pad; 35. first motor; 4. cleaning mechanism; 41. second motor; 42. first screw rod; 43. moving plate; 44. support rod; 441. fixing tube; 442. connecting tube; 443. second bolt; 45. arc pad; 5. fan; 6. flaw detection mechanism; 61. third motor; 62. second screw rod; 63. slider; 64. guide rod; 65. mounting frame; 651. U-shaped frame; 652. L-shaped plate; 653. spring; 66. detection probe; 7. exhaust hole; 8. ash outlet; 9. sealing plate.

DETAILED DESCRIPTION

In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

Please refer to Figures 1 to 3. An embodiment of the present invention provides a metal flaw detection device for detecting a robot arm, and the metal flaw detection device for detecting a robot arm includes: a collection frame 1, a fixing component 3, a cleaning mechanism 4 and a flaw detection mechanism 6. A support plate 2 is fixedly installed on the top of one side of the collection frame 1, the fixing component 3 for clamping the tubular metal is installed on the side wall of the support plate 2, the cleaning mechanism 4 for wiping dust on the surface of the tubular metal is installed on the inner wall of the collection frame 1, and the flaw detection mechanism 6 for comprehensive detection of various positions of the cleaned tubular metal is installed on the side wall of the support plate 2.

It should be noted that: first, the tubular metal is clamped on the support plate 2 through the fixing component 3, and then the outer wall of the tubular metal is cleaned by the cleaning mechanism 4, and the fan 5 can be used to blow air on the tube wall to further improve the cleaning speed, so as to improve the accuracy of the detection data. After the dust and impurities on the surface of the tubular metal are cleaned, the flaw detection mechanism 6 can move back and forth on the outside of the tubular metal, and then drive the clamped tube body to rotate, so that each position of the outer wall of the tube body can be evenly detected, which not only improves the accuracy of the detection data, but also saves time and manpower.

In the embodiment of the present invention, referring to FIG. 1 and FIG. 2 , the fixing assembly 3 includes a rotating rod 31, a fixing sleeve 32, a screw 33 and a pressure pad 34. The rotating rod 31 is rotatably connected to the side wall of the support frame 21, the fixing sleeve 32 is fixedly connected to the other end of the rotating rod 31, a plurality of groups of screws 33 equidistantly distributed are threadedly connected to the side wall of the fixing sleeve 32, and one end of the screw 33 located inside the fixing sleeve 32 is rotatably connected to the pressure pad 34;

The fixing assembly 3 further includes a first motor 35, which is mounted on the side wall of the supporting frame 21, and the rotating rod 31 is fixedly connected to the output end of the first motor 35;

The cleaning mechanism 4 includes a second motor 41, a first screw rod 42, a movable plate 43, a support rod 44 and an arc pad 45. The second motor 41 is fixedly connected to the inner wall of one side of the collection frame 1, the first screw rod 42 is fixedly connected to the output end of the second motor 41, a slide groove 11 is provided on the inner bottom wall of the collection frame 1, the movable plate 43 is slidably connected inside the slide groove 11, and the movable plate 43 is also threadedly connected to the rod wall of the first screw rod 42, support rods 44 are installed on both sides of the movable plate 43, and the other end of the support rod 44 is fixedly installed with an arc pad 45;

The support rod 44 includes a fixing tube 441, a connecting tube 442 and a second bolt 443. One end of the connecting tube 442 is slidably connected to the inside of the fixing tube 441, and the other end of the connecting tube 442 is connected to the arc pad 45. The second bolt 443 is threadedly connected to the outer wall of the fixing tube 441.

It should be noted that: first, the tubular metal body is placed in the fixed sleeve 32, and then the screw rods 33 are rotated to move toward the inner side of the fixed sleeve 32, and the screw rods 33 drive the pressure pads 34 to move and abut against the outer wall of the tube body, so that the tube body is clamped inside the fixed sleeve 32, and then the second bolts 443 are loosened, and the connecting tube 442 is slid toward the inner side of the fixed tube 441, so that the arc pad 45 abuts against the outer wall of the tube body, and then the second bolts 443 are reversed to abut against the side wall of the connecting tube 442 to fix the position of the support rod 44, and then the second motor 41 is started. The movable plate 43 is not only threadedly connected to the first screw rod 42, but also slidably connected to the slide groove 11 on the inner bottom wall of the collecting frame 1, so when the first screw rod 42 rotates forwards and backwards, the movable plate 43 can be driven to move back and forth. Therefore, the movable plate 43 can drive the arc pad 45 to move back and forth against the outer wall of the tube body through the support rod 44, and wipe off the dust and impurities adhered to the surface of the tube body, keep the surface of the tube body clean, and facilitate the subsequent flaw detection of the tube body to improve the accuracy of the detection data.

Among them, fans 5 are installed on the side walls at both ends of the movable plate 43, the fixed cylinder 441 is fixedly connected to the air outlet of the fan 5, the fixed cylinder 441, the connecting cylinder 442 and the arc pad 45 are interconnected, and the inner surface of the arc pad 45 is provided with evenly distributed exhaust holes 7; when the pipe body is wiped and cleaned by the arc pad 45, the fan 5 can also be started to allow the fan 5 to exhaust the wind into the fixed cylinder 441, and then pass through the connecting cylinder 442 and the arc pad 45, and finally be discharged from the exhaust holes 7 on the inner surface of the arc pad 45 to blow toward the pipe body, so as to blow away dust and impurities and further improve the cleaning speed of the pipe body.

Among them, an ash outlet 8 is provided on the side wall of the collecting frame 1, and a sealing plate 9 is slidably connected to the inner wall of the ash outlet 8; the dust cleaned on the surface of the tube body will fall into the collecting frame 1 and be collected. When the detection is completed, the sealing plate 9 in the ash outlet 8 is taken out, and then the dust and impurities are swept out of the ash outlet 8 for centralized treatment to avoid dust from being scattered everywhere and causing pollution.

In the embodiment of the present invention, referring to FIGS. 1 , 2 and 3 , the flaw detection mechanism 6 includes a third motor 61, a second screw rod 62, a slider 63, a guide rod 64, a mounting frame 65 and a detection probe 66. The third motor 61 is fixedly connected to the side wall of the slide 22, the second screw rod 62 is fixedly connected to the output end of the third motor 61, the guide rod 64 is also fixedly connected to the side wall of the slide 22, the slider 63 is threadedly connected to the rod wall of the second screw rod 62, and the slider 63 is also slidably connected to the guide rod 64, the mounting frame 65 is fixedly connected to the bottom of the slider 63, and the detection probe 66 is clamped inside the mounting frame 65;

The mounting frame 65 includes a U-shaped frame 651, an L-shaped plate 652 and a spring 653. The U-shaped frame 651 is fixedly connected to the bottom of the slider 63. Two groups of symmetrically arranged L-shaped plates 652 are slidably connected to the two sides of the bottom of the U-shaped frame 651. A spring 653 is fixedly connected between the side walls of the two groups of L-shaped plates 652 that abut against each other near the top.

The support plate 2 includes a support frame 21, a slide plate 22 and a first bolt 23. The support frame 21 is fixedly connected to the top edge of the collecting frame 1. The slide plate 22 is slidably connected to the inside of the support frame 21. A plurality of groups of equally spaced screw holes 221 are provided on the side wall of the slide plate 22. A group of first bolts 23 matching the screw holes 221 are threadedly connected to the side wall of the support frame 21.

It should be noted that: after the dust and impurities on the surface of the tube body are cleaned, the second motor 41 is stopped and the connecting tube 442 is pulled toward the outside of the fixed tube 441 to separate the arc pad 45 from the tube body, and then the two groups of L-shaped plates 652 at the bottom of the U-shaped frame 651 are pulled toward both sides and drive the spring 653 to be stretched, and then the detection probe 66 is placed between the two groups of L-shaped plates 652, and then the L-shaped plates 652 are released. Under the reaction force of the spring 653, the two groups of L-shaped plates 652 are driven to approach each other and reset to clamp the detection probe 66 under the U-shaped frame 651. At this time, the third motor 61 is started again to drive the second screw rod 62 fixedly connected to its output end to rotate forward and reverse. Because the slider 63 is not only threadedly connected to the second screw rod 62, but also slidably connected to the guide rod 64, the second screw rod 62 When rotating forward and reverse, the slider 63 can be driven to move back and forth, so that the detection probe 66 fixed on the mounting frame 65 can be moved back and forth above the pipe body to perform flaw detection on the pipe body, and the slide plate 22 can be pulled to slide up and down inside the support frame 21, so as to adjust the height of the detection probe 66 and adjust the distance between the detection probe 66 and the pipe body appropriately, and then the first bolt 23 is rotated and screwed into the screw hole 221 on the side wall of the slide plate 22 to fix the position of the slide plate 22. In addition, during the flaw detection of the pipe body, the first motor 35 can be started to drive the pipe body fixed on the inner side of the fixing sleeve 32 to rotate slowly through the rotating rod 31, so that the detection probe 66 can detect various positions on the surface of the pipe body, thereby further improving the accuracy of the detection data.

The working principle of the metal flaw detection device for detecting a manipulator provided by the present invention is as follows: first, a tubular metal body is placed in a fixed sleeve 32, and then each group of screw rods 33 is rotated to move toward the inner side of the fixed sleeve 32, and the screw rods 33 drive each group of pressure pads 34 to move and abut against the outer wall of the tube body, so that the tube body is clamped inside the fixed sleeve 32, and then the second bolt 443 is loosened, and the connecting tube 442 is slid toward the inner side of the fixed tube 441, so that the arc pad 45 abuts against the outer wall of the tube body, and then the second bolt 443 is reversed to abut against the side wall of the connecting tube 442 to fix the position of the support rod 44, and at this time, the second motor 41 is started to drive the first screw rod 42 fixedly connected to its output end to rotate forward and reverse, because the moving plate 43 is not only threadedly connected to the first screw rod 42, but also slidably connected to the slide groove 11 on the inner bottom wall of the collection frame 1 Therefore, when the first screw rod 42 rotates forward and backward, it can drive the moving plate 43 to move back and forth. Therefore, the moving plate 43 can drive the arc pad 45 to move back and forth against the outer wall of the tube body through the support rod 44, so as to wipe off the dust and impurities adhering to the surface of the tube body and keep the surface of the tube body clean. At the same time, the fan 5 can be started to allow the fan 5 to exhaust the wind into the fixed cylinder 441, and then pass through the connecting cylinder 442 and the arc pad 45, and finally be discharged from the exhaust hole 7 on the inner surface of the arc pad 45 to blow toward the tube body, so as to blow away the dust and impurities and further improve the cleaning speed of the tube body. When the dust and impurities on the surface of the tube body are cleaned, the second motor 41 is stopped and the connecting cylinder 442 is pulled toward the outside of the fixed cylinder 441 to separate the arc pad 45 from the tube body, and then the two groups of L-shaped plates 652 at the bottom of the U-shaped frame 651 are pulled to both sides and drive the elastic The spring 653 is stretched under force, and the detection probe 66 is placed between the two groups of L-shaped plates 652. The L-shaped plates 652 are then released. The reaction force of the spring 653 drives the two groups of L-shaped plates 652 to move closer to each other and reset to clamp the detection probe 66 under the U-shaped frame 651. At this time, the third motor 61 is started to drive the second screw rod 62 fixedly connected to its output end to rotate forward and reverse. Because the slider 63 is not only threadedly connected to the second screw rod 62, but also slidably connected to the guide rod 64, the slider 63 can be driven to move back and forth when the second screw rod 62 rotates forward and reverse, so that the detection probe 66 fixed on the mounting frame 65 can be moved back and forth above the pipe body to perform flaw detection on the pipe body, and the slide plate 22 can be pulled to slide up and down inside the support frame 21, so as to adjust the height of the detection probe 66 and make the detection probe 66 and the tube body are adjusted appropriately, and then the first bolt 23 is rotated and screwed into the screw hole 221 on the side wall of the slide plate 22 to fix the position of the slide plate 22. In addition, during the flaw detection of the tube body, the first motor 35 can be started to drive the tube body fixed on the inner side of the fixing sleeve 32 to rotate slowly through the rotating rod 31, so that the detection probe 66 can detect all positions on the surface of the tube body, further improving the accuracy of the detection data. The dust cleaned on the surface of the tube body will fall into the collection frame 1 and be collected. When the detection is completed, the sealing plate 9 in the ash outlet 8 is taken out, and the dust and impurities are swept out of the ash outlet 8 for centralized treatment to avoid dust from being scattered everywhere and causing pollution, so that the metal detection parts can be cleaned, and the metal parts can be automatically and evenly and comprehensively detected and flaw-detected, thereby improving the accuracy of the detection data.

The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims (10)

1. A metal inspection device for detecting a manipulator, comprising:

The collecting frame (1), one side top of the collecting frame (1) is fixedly provided with a supporting plate (2);

The fixing component (3) is used for clamping the tubular metal, and the fixing component (3) is arranged on the side wall of the supporting plate (2);

The cleaning mechanism (4) is used for cleaning dust on the surface of the tubular metal, and the cleaning mechanism (4) is arranged on the inner wall of the collecting frame (1);

and the flaw detection mechanism (6) is used for comprehensively detecting all positions of the cleaned tubular metal, and the flaw detection mechanism (6) is arranged on the side wall of the supporting plate (2).

2. The metal flaw detection device for detecting mechanical arms according to claim 1, wherein the supporting plate (2) comprises a supporting frame (21), a sliding plate (22) and a first bolt (23), the supporting frame (21) is fixedly connected with the top edge of the collecting frame (1), the sliding plate (22) is slidably connected inside the supporting frame (21), a plurality of groups of equally distributed screw holes (221) are formed in the side wall of the sliding plate (22), and a group of first bolts (23) matched with the screw holes (221) are connected to the side wall of the supporting frame (21) in a threaded mode.

3. The metal flaw detection device for detecting mechanical arms according to claim 2, wherein the fixing assembly (3) comprises a rotating rod (31), a fixing sleeve (32), a screw rod (33) and a pressing pad (34), the rotating rod (31) is rotationally connected to the side wall of the supporting frame (21), the fixing sleeve (32) is fixedly connected with the other end of the rotating rod (31), a plurality of groups of screws (33) distributed at equal intervals are connected to the side wall of the fixing sleeve (32) in a threaded mode, and one end of the screw rod (33) located on the inner side of the fixing sleeve (32) is rotationally connected with the pressing pad (34).

4.A metal inspection device for inspecting a manipulator according to claim 3, wherein the fixing assembly (3) further comprises a first motor (35), the first motor (35) is mounted on a side wall of the supporting frame (21), and the rotating rod (31) is fixedly connected with an output end of the first motor (35).

5. The metal flaw detection device for detecting mechanical arms according to claim 1, wherein the cleaning mechanism (4) comprises a second motor (41), a first screw rod (42), a moving plate (43), a supporting rod (44) and an arc pad (45), the second motor (41) is fixedly connected with the inner wall of one side of the collecting frame (1), the first screw rod (42) is fixedly connected with the output end of the second motor (41), a sliding groove (11) is formed in the inner bottom wall of the collecting frame (1), the moving plate (43) is slidably connected in the sliding groove (11), the moving plate (43) is further in threaded connection with the rod wall of the first screw rod (42), the supporting rods (44) are mounted on two sides of the moving plate (43), and the arc pad (45) is fixedly mounted at the other end of the supporting rod (44).

6. The metal inspection device for inspecting a manipulator according to claim 5, wherein the supporting rod (44) comprises a fixed cylinder (441), a connecting cylinder (442) and a second bolt (443), one end of the connecting cylinder (442) is slidably connected inside the fixed cylinder (441), the other end of the connecting cylinder (442) is connected with the arc pad (45), and the second bolt (443) is screwed on the outer wall of the fixed cylinder (441).

7. The metal flaw detection device for detecting mechanical arms according to claim 6, wherein fans (5) are mounted on two side walls of the moving plate (43), the fixed cylinder (441) is fixedly connected with air outlets of the fans (5), the fixed cylinder (441), the connecting cylinder (442) and the arc-shaped pad (45) are mutually communicated, and exhaust holes (7) which are uniformly distributed are formed in the inner side surfaces of the arc-shaped pad (45).

8. The metal flaw detection device for detecting a mechanical arm according to claim 2, wherein the flaw detection mechanism (6) comprises a third motor (61), a second screw rod (62), a sliding block (63), a guide rod (64), a mounting frame (65) and a detection probe (66), the third motor (61) is fixedly connected with the side wall of the sliding plate (22), the second screw rod (62) is fixedly connected with the output end of the third motor (61), the guide rod (64) is also fixedly connected with the side wall of the sliding plate (22), the sliding block (63) is in threaded connection with the rod wall of the second screw rod (62), the sliding block (63) is also in sliding connection with the guide rod (64), the mounting frame (65) is fixedly connected with the bottom of the sliding block (63), and the detection probe (66) is clamped inside the mounting frame (65).

9. The metal flaw detection device for detecting mechanical arms according to claim 8, wherein the mounting frame (65) comprises a U-shaped frame (651), an L-shaped plate (652) and springs (653), the U-shaped frame (651) is fixedly connected with the bottom of the sliding block (63), two groups of symmetrically arranged L-shaped plates (652) are slidably connected to two sides of the bottom of the U-shaped frame (651), and the springs (653) are fixedly connected between the two groups of side walls, which are propped against the top, of the L-shaped plates (652).

10. The metal flaw detection device for detecting mechanical arms according to claim 1, wherein a dust outlet (8) is arranged on the side wall of the collecting frame (1), and a sealing plate (9) is connected to the inner wall of the dust outlet (8) in a sliding manner.