Ventilation pipe inner wall polishing and dust removing equipment for air cooler

Abstract

The ventilation pipe inner wall polishing and dust removing equipment for the air cooler comprises a fixed bottom plate, a plurality of balancing weights are installed at the bottom of the fixed bottom plate, a connecting plate is installed on the surface of the fixed bottom plate, a supporting vertical rod is welded to the connecting plate, a movable frame is movably arranged at the top of the supporting vertical rod, and a fixed sleeve is fixedly connected to the bottom of the movable frame. The fixing sleeves are movably inserted into the supporting vertical rods, a conveying block is installed between the movable frames, and a circular groove is formed in the conveying block; compared with the prior art, when a transmission shaft enters a ventilation pipe, the surface of a transmission wheel can abut against the inner wall of the ventilation pipe, and a hinge plate and a hinge shaft can be driven to move, so that a sliding block moves on the transmission shaft, and the interaction force between an extrusion block and a conical air pressure pipe is changed; and the position of the arc-shaped plate in the arc-shaped clamping groove can be adjusted, the position of the polishing plate can be automatically adjusted within a certain range, and the situation that polishing is incomplete or excessive is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of processing accessories of air coolers, in particular to a ventilation pipe inner wall grinding and dust removal device for air coolers. Background Art

[0002] Industrial air coolers are environmentally friendly products without compressors, refrigerants or pollution. They use the principle of evaporative cooling of outdoor fresh air to cool the room and conduct convection ventilation with the room to achieve the purpose of indoor ventilation and cooling. Compared with traditional compressor air conditioning systems, the cost is less than half, and the equipment does not occupy any building area.

[0003] The ventilation duct is a hollow pipe used for ventilation. It is very common in fresh air systems and is used in large quantities in factories. Round ventilation ducts are usually formed by spiral traction and then cut to the required length. However, after the ventilation duct is formed, there are often plastic protrusions and fragments remaining on the inner wall. During subsequent use, it is easy to break and accumulate on the screening mechanism, affecting the normal use of the air cooler. For this reason, we propose a ventilation duct inner wall grinding and dust removal equipment for air coolers to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a device for grinding and removing dust from the inner wall of a ventilation duct for an air cooler, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a dust removal device for grinding the inner wall of a ventilation duct for a cold air blower, comprising a fixed bottom plate, a plurality of counterweights are installed at the bottom of the fixed bottom plate, a connecting plate is installed on the surface of the fixed bottom plate, a supporting vertical rod is welded on the connecting plate, a movable frame is movably provided on the top of the supporting vertical rod, a fixed sleeve is fixedly connected to the bottom of the movable frame, and the fixed sleeve is movably inserted on the supporting vertical rod, a transmission block is installed between the movable frames, a circular groove is opened inside the transmission block, and a movable rod is movably inserted inside the circular groove, a plurality of transmission rods are installed on the transmission block, one end of the movable rod is fixedly connected to a metal plate, and one end of the transmission rod is installed on the metal plate, and a transmission shaft is installed on the other end of the movable rod;

[0006] A sealing plate is provided on one side of the transmission shaft, and the sealing plate is movably arranged on the movable rod. The transmission shaft is hollow, and a grinding mechanism and a cleaning mechanism are respectively provided on the surface of the transmission shaft. When the inner wall of the ventilation pipe needs to be polished, the ventilation pipe can be quickly limited by external equipment, and the height of the movable frame can be adjusted so that the transmission shaft and the ventilation pipe are concentrically arranged. With the movement of the movable rod, the grinding mechanism and the cleaning mechanism can be cooperated to quickly clean and polish the inside of the pipe to avoid residual burrs on the inner wall of the ventilation pipe, so as to facilitate subsequent coating and painting.

[0007] Preferably, a pair of telescopic rods are installed at one end of the sealing plate close to the transmission block, one end of the telescopic rod is installed on the transmission block, and a fixing tube is provided on the top of one side of the telescopic rod, and the fixing tube is installed on the surface of the sealing plate;

[0008] A grid ring is installed on the surface of the sealing plate, and the cross-section of the grid ring is "C"-shaped. Multiple dust collection plates are installed inside the grid ring, and the position of the fixed pipe corresponds to the grid ring. The sealing plate can be pressed against one end of the ventilation pipe, and the external exhaust pipe can be installed on the fixed pipe. The debris generated inside can be discharged along the airflow to avoid dust flying during the grinding process.

[0009] Preferably, a fixed disk is fixedly connected inside the transmission shaft, a conical air pressure tube is fixedly connected inside the fixed disk, one end of the conical air pressure tube is fixedly connected to the inner wall of the transmission shaft, a plurality of transmission tubes are fixedly connected on the surface of the conical air pressure tube, a plurality of positioning grooves are provided on the surface of the transmission shaft, and one end of the transmission tube is clamped inside the positioning groove;

[0010] The top of the sliding panel also is provided with an interlocking structure, and the interlocking structure is hinged on the base, and the interlocking structure is hinged on the base with a plurality of interlocking plates.

[0011] Preferably, a plurality of rotating grooves are provided on the surface of the transmission wheel, and an elliptical block is movably provided inside the rotating groove, a plurality of reset shafts are fixedly connected to the surface of the transmission shaft, the top of the reset shaft is made of elastic material, a buffer groove is provided on the top of the reset shaft, and the position of the buffer groove corresponds to the elliptical block.

[0012] Preferably, the grinding mechanism comprises a transmission ring, a grinding plate, an arc plate and an inclined plate, the transmission ring is rotatably arranged on the surface of the transmission shaft, the position of the transmission ring corresponds to the positioning groove, a pair of limit rings are installed on the surface of the transmission shaft, and a servo motor is installed on one side of the limit ring, the transmission ring is movably arranged between the limit rings, an annular groove is opened on the side of the transmission ring close to the servo motor, a plurality of transmission teeth are fixedly connected to the inner wall of the annular groove, and a movable gear is installed on the output end of the servo motor, and the transmission teeth are meshed with the movable gear;

[0013] A plurality of arc-shaped grooves are provided on the side wall of the transmission ring, and the arc-shaped plate is movably arranged inside the arc-shaped grooves. The bottom of the arc-shaped plate is abutted against the top of the transmission pipe. An annular groove is provided on the inner wall of the transmission ring, and the diameter of the annular groove is greater than the width of the arc-shaped plate. A pair of buffer shafts are fixedly connected to one end of the arc-shaped plate, and the grinding plate is installed at one end of the buffer shaft. The grinding plate is arc-shaped, and the inclined plates are evenly arrayed and installed at both ends of the grinding plate. The transmission ring can be driven to rotate by a servo motor, and can cooperate with the grinding plate to quickly grind the inner wall of the ventilation pipe. In the process of rotation of the transmission ring, the inclined plate can swing under the action of inertia.

[0014] Preferably, the inclined plate has a "U"-shaped cross-section and is elastic, a pair of counterweight balls are fixedly connected at both ends of the inclined plate, and rubber buffer pads are fixedly connected at both ends of the outer walls of the counterweight balls. When the inclined plate moves, the counterweight balls collide with each other, which can cause the grinding plate to shake during the grinding process, and can quickly discharge plastic debris, etc., for subsequent collection, avoiding accumulation on the surface of the grinding plate.

[0015] Preferably, the cleaning mechanism comprises a transmission ring, a reset plate and an elastic shaft, the transmission ring is rotatably arranged on the surface of the transmission shaft, the reset plate is arc-shaped and elastic, the reset plate is fixedly connected to the outer wall of the transmission ring, the reset plates are arranged in an annular array on the outside of the transmission ring, the top of the elastic shaft is clamped on the inner wall of the reset plate, the bottom of the elastic shaft is installed on the surface of the transmission ring, and a rubber block is fixedly connected to the elastic shaft;

[0016] A plurality of limit grooves are provided on the surface of the reset plate, and swing balls are fixedly connected inside the limit grooves. A plurality of friction grooves are provided on the surface of the swing balls, and the swing balls are made of nylon. The reset plate can be deformed under the action of centrifugal force by rotating on the transmission ring, and the swing balls can knock against the inner wall of the ventilation pipe, so that large plastic protrusions and some dirt accumulated on the inner wall can be quickly cleaned, which can play a role of pretreatment.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. When the transmission shaft of the present invention enters the ventilation pipe, the surface of the transmission wheel can be abutted against the inner wall of the ventilation pipe, which can drive the hinge plate and the hinge shaft to move, thereby moving the sliding block on the transmission shaft, changing the interaction force between the extrusion block and the conical air pressure tube, adjusting the position of the arc plate inside the arc slot, and self-adjusting the position of the grinding plate within a certain range, thereby reducing the occurrence of incomplete grinding or excessive grinding;

[0019] 2. The present invention can make the reset plate deform under the action of centrifugal force by rotating the transmission ring, so that the swing ball and the inner wall of the ventilation pipe can knock against each other, and the large plastic protrusions and some dirt accumulated on the inner wall can be quickly cleaned, which can play a role of pretreatment;

[0020] 3. The present invention can quickly stop the transmission ring after cleaning, and the reset plate can quickly reset under the action of the elastic shaft, and the rubber block can collide with the reset plate, and the impurities accumulated on the reset plate can be quickly shaken off, which can play a role of self-cleaning;

[0021] 4. The present invention can drive the transmission ring to rotate through the servo motor, and can cooperate with the grinding plate to quickly grind the inner wall of the ventilation pipe. With the effect of inertia, the inclined plate can swing, and the counterweight balls collide with each other, which can cause the grinding plate to shake during the grinding process, and can quickly discharge plastic debris, which is convenient for subsequent collection and avoids accumulation on the surface of the grinding plate;

[0022] 5. The sealing plate of the present invention can be pressed against one end of the ventilation pipe, and the external exhaust pipe can be installed on the fixed pipe, so that the debris generated inside can be discharged along the airflow to avoid dust flying during the grinding process, and the plastic debris can be accumulated between the dust collection plates, which is convenient for the operator to collect later. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the internal cross-sectional structure of the transmission shaft of the present invention;

[0025] Figure 3 For the present invention Figure 1 A partial enlarged schematic diagram in the middle;

[0026] Figure 4 This is a schematic diagram of the structure of one side of the sealing plate of the present invention;

[0027] Figure 5 This is a schematic diagram of the grinding mechanism structure of the present invention;

[0028] Figure 6It is a schematic diagram of the cleaning mechanism structure of the present invention;

[0029] In the figure: 1, fixed bottom plate; 2, sealing plate; 3, transmission shaft; 4, grinding mechanism; 5, cleaning mechanism; 11, connecting plate; 12, supporting vertical rod; 13, movable frame; 14, movable rod; 15, transmission block; 21, telescopic rod; 22, grid ring; 31, fixed plate; 32, conical air pressure tube; 321, transmission tube; 33, reset shaft; 34, sliding block; 341, extrusion block; 35, fixed shaft; 36, hinged plate; 361, transmission wheel; 37, hinged shaft; 41, transmission ring; 42, annular groove; 421, transmission tooth; 43, buffer shaft; 44, grinding plate; 45, arc plate; 46, tilting plate; 461, counterweight ball; 51, transmission ring; 52, reset plate; 521, limit groove; 53, swing ball; 531, friction groove; 54, elastic shaft. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-6 The present invention provides a technical solution: a dust removal device for grinding the inner wall of a ventilation duct for a cold air blower, comprising a fixed bottom plate 1, a plurality of counterweights are installed at the bottom of the fixed bottom plate 1, a connecting plate 11 is installed on the surface of the fixed bottom plate 1, a supporting vertical rod 12 is welded on the connecting plate 11, a movable frame 13 is movably provided on the top of the supporting vertical rod 12, a fixed sleeve is fixedly connected to the bottom of the movable frame 13, and the fixed sleeve is movably inserted on the supporting vertical rod 12, a transmission block 15 is installed between the movable frames 13, a circular groove is opened inside the transmission block 15, and a movable rod 14 is movably inserted inside the circular groove, a plurality of transmission rods are installed on the transmission block 15, one end of the movable rod 14 is fixedly connected to a metal plate, and one end of the transmission rod is installed on the metal plate, and a transmission shaft 3 is installed on the other end of the movable rod 14;

[0032] A sealing plate 2 is provided on one side of the transmission shaft 3, and the sealing plate 2 is movably arranged on a movable rod 14. The transmission shaft 3 is hollow, and a grinding mechanism 4 and a cleaning mechanism 5 are respectively provided on the surface of the transmission shaft 3. When the inner wall of the ventilation pipe needs to be polished, the ventilation pipe can be quickly limited under the action of external equipment, and the height of the movable frame 13 can be adjusted so that the transmission shaft 3 and the ventilation pipe are concentrically arranged. With the movement of the movable rod 14, the grinding mechanism 4 and the cleaning mechanism 5 can be cooperated to quickly clean and polish the inside of the pipe to avoid residual burrs on the inner wall of the ventilation pipe, so as to facilitate subsequent coating and painting.

[0033] A pair of telescopic rods 21 are installed at one end of the sealing plate 2 close to the transmission block 15, one end of the telescopic rod 21 is installed on the transmission block 15, and a fixing pipe is provided on the top of one side of the telescopic rod 21, and the fixing pipe is installed on the surface of the sealing plate 2;

[0034] A grid ring 22 is installed on the surface of the sealing plate 2. The cross-section of the grid ring 22 is "C"-shaped. Multiple dust collection plates are installed inside the grid ring 22, and the position of the fixed pipe corresponds to the grid ring 22. The sealing plate 2 can be pressed against one end of the ventilation pipe, and the external exhaust pipe can be installed on the fixed pipe. The debris generated inside can be discharged along the airflow to avoid dust flying during the grinding process, and plastic debris can be accumulated between the dust collection plates, which is convenient for the operator to collect later.

[0035] A fixed plate 31 is fixedly connected inside the transmission shaft 3, a conical air pressure tube 32 is fixedly connected inside the fixed plate 31, one end of the conical air pressure tube 32 is fixedly connected to the inner wall of the transmission shaft 3, a plurality of transmission tubes 321 are fixedly connected on the surface of the conical air pressure tube 32, a plurality of positioning grooves are opened on the surface of the transmission shaft 3, and one end of the transmission tube 321 is clamped inside the positioning groove;

[0036] A plurality of hinge blocks are fixedly connected on the surface of the fixed disk 31, and a pair of hinge plates 36 are rotatably provided on the hinge blocks, a transmission wheel 361 is rotatably provided between the hinge plates 36, a pair of hinge shafts 37 are rotatably provided on the outer wall of the hinge plates 36, a plurality of sliding blocks 34 are movably provided on the surface of the transmission shaft 3, the hinge shafts 37 are rotatably provided on both sides of the sliding blocks 34, an extrusion block 341 is fixedly connected to the bottom of the sliding block 34, the extrusion block 341 passes through the outer wall of the transmission shaft 3 and the bottom is against the surface of the conical air pressure tube 32, a plurality of fixed shafts 35 are fixedly connected on the surface of the fixed disk 31, and the position of the fixed shaft 35 is the same as that of the extrusion block 341. Corresponding to the pressure block 341, a return spring is fixedly connected between the fixed shaft 35 and the extrusion block 341. When the transmission shaft 3 enters the ventilation pipe, the surface of the transmission wheel 361 can be abutted against the inner wall of the ventilation pipe, which can drive the hinge plate 36 and the hinge shaft 37 to move, thereby causing the sliding block 34 to move on the transmission shaft 3, changing the interaction force between the extrusion block 341 and the conical air pressure tube 32, and adjusting the position of the arc plate 45 inside the arc slot. The position of the grinding plate 44 can be self-adjusted within a certain range to reduce the occurrence of incomplete grinding or excessive grinding.

[0037] A plurality of rotating grooves are provided on the surface of the transmission wheel 361, and an elliptical block is movably provided inside the rotating groove. A plurality of reset shafts 33 are fixedly connected to the surface of the transmission shaft 3. The top of the reset shaft 33 is made of elastic material. A buffer groove is provided on the top of the reset shaft 33, and the position of the buffer groove corresponds to the elliptical block.

[0038] The grinding mechanism 4 includes a transmission ring 41, a grinding plate 44, an arc plate 45 and an inclined plate 46. The transmission ring 41 is rotatably arranged on the surface of the transmission shaft 3. The position of the transmission ring 41 corresponds to the positioning groove. A pair of limit rings are installed on the surface of the transmission shaft 3, and a servo motor is installed on one side of the limit ring. The transmission ring 41 is movably arranged between the limit rings. An annular groove 42 is opened on the side of the transmission ring 41 close to the servo motor. A plurality of transmission teeth 421 are fixedly connected to the inner wall of the annular groove 42, and a movable gear is installed on the output end of the servo motor, and the transmission teeth 421 are meshed with the movable gear.

[0039] A plurality of arc-shaped slots are provided on the side wall of the transmission ring 41, and an arc-shaped plate 45 is movably arranged inside the arc-shaped slots. The bottom of the arc-shaped plate 45 is abutted against the top of the transmission tube 321. An annular groove is provided on the inner wall of the transmission ring 41, and the diameter of the annular groove is greater than the width of the arc-shaped plate 45. A pair of buffer shafts 43 are fixedly connected to one end of the arc-shaped plate 45, and a grinding plate 44 is installed at one end of the buffer shaft 43. The grinding plate 44 is arc-shaped, and the inclined plates 46 are evenly arrayed and installed at both ends of the grinding plate 44. The transmission ring 41 can be driven to rotate by a servo motor, and can cooperate with the grinding plate 44 to quickly grind the inner wall of the ventilation tube. In the process of rotation of the transmission ring 41, the inclined plate 46 can swing under the action of inertia.

[0040] The inclined plate 46 has a U-shaped cross-section and is elastic. A pair of counterweight balls 461 are fixedly connected at both ends of the inclined plate 46. Rubber buffer pads are fixedly connected at both ends of the outer walls of the counterweight balls 461. When the inclined plate 46 moves, the counterweight balls 461 collide with each other, which can cause the grinding plate 44 to shake during the grinding process, and can quickly discharge plastic debris, etc., for subsequent collection, to avoid accumulation on the surface of the grinding plate 44.

[0041] The cleaning mechanism 5 includes a transmission ring 51, a reset plate 52 and an elastic shaft 54. The transmission ring 51 is rotatably arranged on the surface of the transmission shaft 3. The reset plate 52 is arc-shaped and elastic. The reset plate 52 is fixedly connected to the outer wall of the transmission ring 51. The reset plate 52 is arranged in an annular array on the outside of the transmission ring 51. The top of the elastic shaft 54 ​​is clamped on the inner wall of the reset plate 52. The bottom of the elastic shaft 54 ​​is installed on the surface of the transmission ring 51. A rubber block is fixedly connected to the elastic shaft 54. After the cleaning is completed, the transmission ring 51 can be quickly stopped, and the reset plate 52 can be quickly reset under the action of the elastic shaft 54. The rubber block can collide with the reset plate 52, and the impurities accumulated on the reset plate 52 can be quickly shaken off, which can play a self-cleaning role.

[0042] A plurality of limit grooves 521 are provided on the surface of the reset plate 52, and a swing ball 53 is fixedly connected inside the limit grooves 521. A plurality of friction grooves 531 are provided on the surface of the swing ball 53. The swing ball 53 is made of nylon. The reset plate 52 can be deformed under the action of centrifugal force by rotating the transmission ring 51, so that the swing ball 53 and the inner wall of the ventilation pipe can knock against each other, and large plastic protrusions and some dirt accumulated on the inner wall can be quickly cleaned, which can play a role of pretreatment.

[0043] Working principle: first, when it is necessary to grind the inner wall of the ventilation pipe, the ventilation pipe can be quickly limited under the action of external equipment, and the height of the movable frame 13 can be adjusted so that the transmission shaft 3 and the ventilation pipe are concentrically arranged. With the movement of the movable rod 14, the grinding mechanism 4 and the cleaning mechanism 5 can be quickly cleaned and polished inside the pipe to avoid residual burrs on the inner wall of the ventilation pipe, which is convenient for subsequent coating and painting. When the transmission shaft 3 enters the ventilation pipe, the surface of the transmission wheel 361 can be abutted against the inner wall of the ventilation pipe, which can drive the hinge plate 36 and the hinge shaft 37 to move, and then the sliding block 34 can be moved on the transmission shaft 3, changing the interaction force between the extrusion block 341 and the conical air pressure tube 32, and adjusting the position of the arc plate 45 inside the arc slot. The position of the grinding plate 44 can be self-adjusted within a certain range to reduce the occurrence of incomplete grinding or excessive grinding.

[0044] Then, the transmission ring 51 rotates, which can cause the reset plate 52 to deform under the action of centrifugal force, and the swing ball 53 can knock against the inner wall of the ventilation pipe, so that the large plastic protrusions and some dirt accumulated on the inner wall can be quickly cleaned, which can play a role of pretreatment. After the cleaning is completed, the transmission ring 51 can be quickly stopped, and the reset plate 52 can be quickly reset under the action of the elastic shaft 54, and the rubber block can collide with the reset plate 52, so that the impurities accumulated on the reset plate 52 can be quickly shaken off, which can play a role of self-cleaning.

[0045] Finally, under the action of the servo motor, the transmission ring 41 can be driven to rotate, and the inner wall of the ventilation pipe can be quickly polished in cooperation with the polishing plate 44. With the action of inertia, the inclined plate 46 can swing, and the counterweight balls 461 collide with each other, which can cause the polishing plate 44 to shake during the polishing process, and the plastic debris can be quickly discharged for subsequent collection, avoiding accumulation on the surface of the polishing plate 44. As the sealing plate 2 can be against one end of the ventilation pipe, and the external exhaust pipe can be installed on the fixed pipe, the debris generated inside can be discharged along the airflow to avoid dust flying during the polishing process, and the plastic debris can be accumulated between the dust collection plates, which is convenient for the operator to collect later.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for grinding and removing dust from the inner wall of a ventilation duct for an air cooler, comprising a fixed bottom plate (1), characterized in that: A plurality of counterweights are installed at the bottom of the fixed bottom plate (1), a connecting plate (11) is installed on the surface of the fixed bottom plate (1), a supporting vertical rod (12) is welded to the connecting plate (11), a movable frame (13) is movably provided at the top of the supporting vertical rod (12), a fixed sleeve is fixedly connected to the bottom of the movable frame (13), and the fixed sleeve is movably inserted on the supporting vertical rod (12), a transmission block (15) is installed between the movable frames (13), a circular groove is provided inside the transmission block (15), and a movable rod (14) is movably inserted inside the circular groove, a plurality of transmission rods are installed on the transmission block (15), one end of the movable rod (14) is fixedly connected to a metal plate, and one end of the transmission rod is installed on the metal plate, and the other end of the movable rod (14) is installed with a transmission shaft (3); A sealing plate (2) is provided on one side of the transmission shaft (3); the sealing plate (2) is movably arranged on a movable rod (14); the transmission shaft (3) is hollow; and a grinding mechanism (4) and a cleaning mechanism (5) are respectively provided on the surface of the transmission shaft (3).

2. The device for grinding and dust removal of the inner wall of a ventilation pipe for a cold air machine according to claim 1, characterized in that: A pair of telescopic rods (21) are installed at one end of the sealing plate (2) close to the transmission block (15), one end of the telescopic rod (21) is installed on the transmission block (15), and a fixing tube is provided at the top of one side of the telescopic rod (21), and the fixing tube is installed on the surface of the sealing plate (2); A grid ring (22) is installed on the surface of the sealing plate (2), the cross section of the grid ring (22) is "C"-shaped, a plurality of dust collecting plates are installed inside the grid ring (22), and the position of the fixed pipe corresponds to the grid ring (22).

3. The device for grinding and dust removal of the inner wall of a ventilation duct for a cold air machine according to claim 1, characterized in that: A fixed disk (31) is fixedly connected inside the transmission shaft (3), a conical air pressure tube (32) is fixedly connected inside the fixed disk (31), one end of the conical air pressure tube (32) is fixedly connected to the inner wall of the transmission shaft (3), a plurality of transmission tubes (321) are fixedly connected to the surface of the conical air pressure tube (32), a plurality of positioning grooves are provided on the surface of the transmission shaft (3), and one end of the transmission tube (321) is clamped inside the positioning groove; A plurality of hinge blocks are fixedly connected to the surface of the fixed disk (31), and a pair of hinge plates (36) are rotatably provided on the hinge blocks. A transmission wheel (361) is rotatably provided between the hinge plates (36). A pair of hinge shafts (37) are rotatably provided on the outer wall of the hinge plate (36). A plurality of sliding blocks (34) are movably provided on the surface of the transmission shaft (3). The hinge shafts (37) are rotatably provided on both sides of the sliding blocks (34). An extrusion block (341) is fixedly connected to the bottom of the sliding block (34). The extrusion block (341) passes through the outer wall of the transmission shaft (3) and the bottom thereof abuts against the surface of the conical air pressure tube (32). A plurality of fixed shafts (35) are fixedly connected to the surface of the fixed disk (31). The positions of the fixed shafts (35) correspond to the extrusion blocks (341). A return spring is fixedly connected between the fixed shafts (35) and the extrusion blocks (341).

4. The device for grinding and dust removal of the inner wall of a ventilation duct for a cold air machine according to claim 3 is characterized in that: A plurality of rotation grooves are provided on the surface of the transmission wheel (361), and an elliptical block is movably provided inside the rotation groove. A plurality of reset shafts (33) are fixedly connected to the surface of the transmission shaft (3). The top of the reset shaft (33) is made of elastic material. A buffer groove is provided on the top of the reset shaft (33), and the position of the buffer groove corresponds to the elliptical block.

5. The device for grinding and dust removal of the inner wall of a ventilation duct for a cold air machine according to claim 1, characterized in that: The grinding mechanism (4) comprises a transmission ring (41), a grinding plate (44), an arc plate (45) and an inclined plate (46); the transmission ring (41) is rotatably arranged on the surface of the transmission shaft (3); the position of the transmission ring (41) corresponds to the positioning groove; a pair of limit rings are installed on the surface of the transmission shaft (3); a servo motor is installed on one of the limit rings; the transmission ring (41) is movably arranged between the limit rings; an annular groove (42) is provided on a side of the transmission ring (41) close to the servo motor; a plurality of transmission teeth (421) are fixedly connected to the inner wall of the annular groove (42); a movable gear is installed on the output end of the servo motor; the transmission teeth (421) mesh with the movable gear; A plurality of arc-shaped slots are provided on the side wall of the transmission ring (41); the arc-shaped plate (45) is movably arranged inside the arc-shaped slots; an annular groove is provided on the inner wall of the transmission ring (41); the diameter of the annular groove is greater than the width of the arc-shaped plate (45); the bottom of the arc-shaped plate (45) abuts against the top of the transmission tube (321); a pair of buffer shafts (43) are fixedly connected to one end of the arc-shaped plate (45); the grinding plate (44) is mounted on one end of the buffer shaft (43); the grinding plate (44) is arc-shaped; and the inclined plates (46) are mounted on both ends of the grinding plate (44) in a uniform array.

6. The device for grinding and dust removal of the inner wall of a ventilation duct for a cold air machine according to claim 5, characterized in that: The inclined plate (46) has a U-shaped cross-section and is elastic. A pair of weighted balls (461) are fixedly connected at both ends of the inclined plate (46). Rubber buffer pads are fixedly connected at both ends of the outer walls of the weighted balls (461).

7. The device for grinding and dust removal of the inner wall of a ventilation duct for a cold air machine according to claim 1, characterized in that: The cleaning mechanism (5) comprises a transmission ring (51), a reset plate (52) and an elastic shaft (54); the transmission ring (51) is rotatably arranged on the surface of the transmission shaft (3); the reset plate (52) is arc-shaped and elastic; the reset plate (52) is fixedly connected to the outer wall of the transmission ring (51); the reset plates (52) are arranged in an annular array on the outer side of the transmission ring (51); the top of the elastic shaft (54) is clamped on the inner wall of the reset plate (52); the bottom of the elastic shaft (54) is installed on the surface of the transmission ring (51); and a rubber block is fixedly connected to the elastic shaft (54); A plurality of limiting grooves (521) are provided on the surface of the reset plate (52), a swing ball (53) is fixedly connected inside each of the limiting grooves (521), a plurality of friction grooves (531) are provided on the surface of the swing ball (53), and the swing ball (53) is made of nylon.

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