Sand blasting device for metal piece rust removal

Abstract

The invention relates to the technical field of sand blasting, in particular to a sand blasting device for metal part rust removal. Comprising a sand pipe arranged on a movable support, an electric control valve is installed on the sand pipe, a motor is installed on the sand pipe, the sand pipe is rotationally connected with a rotating pipe, the rotating pipe is fixedly connected with a flow guide frame, and the flow guide frame is communicated with a sand blasting nozzle. The flow guide frame is slidably connected with a sliding rod, the sliding rod is fixedly connected with a detection frame, and the sliding rod is provided with a pressure sensor. The flow of the electric control valve is regulated and controlled through the two pressure sensors, the sand blasting amount at different diameter positions of the inner wall of the pipeline is adjusted so as to adapt to different sand blasting amounts needed by all positions of the variable-diameter pipeline, then the uniformity of sand blasting of the inner wall of the variable-diameter pipeline is guaranteed, the sand blasting derusting effect is guaranteed, and when the branch position of the variable-diameter pipeline is encountered, the sand blasting efficiency is improved. And the probability that the normal use of the variable-diameter pipeline branch pipe is influenced by sand accumulation in the variable-diameter pipeline branch pipe is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of sandblasting, and in particular to a sandblasting device for rust removal of metal parts. Background Art

[0002] In the traditional technology of sandblasting, rust removal and polishing of the inner wall of pipelines, a fixed sandblasting nozzle is usually used in combination with a movable support to uniformly sandblast the inner wall of the pipeline. However, in the operation scenario of a variable-diameter pipeline with a branch structure, the prior art has the following significant defects: The conventional sandblasting device lacks the ability to respond in real time to changes in the inner diameter of the pipeline. When the sandblasting nozzle enters a variable-diameter area (such as a reduced-diameter section or an enlarged-diameter section), the distance between the sandblasting nozzle and the pipe wall changes, and the coverage area of the sandblasting also changes. This will cause different amounts of sandblasting to be required at different diameters of the pipeline, resulting in excessive or insufficient sandblasting amounts at different diameters of the pipeline, thereby causing uneven removal of rust on the inner wall of the pipeline, affecting the effect of sandblasting and rust removal, and even causing damage to the pipe wall. Summary of the Invention

[0003] In order to overcome the disadvantages pointed out in the above background, the present invention provides a sandblasting device for rust removal of metal parts.

[0004] The technical solution of the present invention is: a sandblasting device for rust removal of metal parts, including a sand pipe arranged on a movable support, an electric control valve is installed on the sand pipe, a motor is installed on the sand pipe, a rotating pipe communicated with the sand pipe is rotatably connected at a position close to the motor, and the output shaft of the motor is driven by a first gear set to the rotating pipe, the rotating pipe is fixedly connected and communicated with a diversion frame, and the diversion frame is communicated with a sandblasting nozzle; A plurality of sliding rods distributed circumferentially are slidably connected to the diversion frame, a detection frame is fixedly connected to the sliding rod, all the detection frames are symmetrically distributed about the center, a pressure sensor is installed on the side of the sliding rod away from the detection frame, and a first elastic member is fixedly connected between the pressure sensor and the diversion frame.

[0005] Further, a slope and a collection groove are provided on one side of the detection frame facing the rotation direction of the diversion frame.

[0006] Further, a flexible cleaning member is fixedly connected to the side of the detection frame away from the diversion frame.

[0007] Further, the diversion frame is slidably connected to the sandblasting nozzle, an adjustment frame is fixedly connected to the sandblasting nozzle, and a second elastic member is fixedly connected between the adjustment frame and the diversion frame.

[0008] Further, the adjustment frame is provided with symmetrically distributed guiding surfaces.

[0009] Further description: the detection frame is fixedly connected with an elastic telescopic rod, and the telescopic rod of the elastic telescopic rod is fixedly connected with a hard cleaning piece.

[0010] It is further described that the hard cleaning member and the adjacent flexible cleaning member are arranged in sequence along the rotation direction of the guide frame.

[0011] Further description, the rotating tube is rotatably connected to a rotating ring, the output shaft of the motor and the rotating ring are transmitted through a second gear set, the hard cleaning part is fixedly connected to a first extrusion block through a connecting rod, and the rotating ring is fixedly connected to second extrusion blocks evenly distributed circumferentially, and all of the second extrusion blocks are used to extrude the first extrusion block.

[0012] It is further specified that the length of the second extrusion block is greater than the length of the first extrusion block.

[0013] It is further explained that, in the first gear set and the second gear set on the output shaft of the motor, one has an even number of gears and the other has an odd number of gears, so that the rotation direction of the rotating ring is opposite to the rotation direction of the rotating tube.

[0014] The beneficial effects of the above technical solution are as follows: 1. The present invention adjusts the sandblasting amount at different diameters of the inner wall of the pipeline by regulating the flow of the electric control valve through two pressure sensors to adapt to the different sandblasting amounts required at various locations of the variable diameter pipeline, thereby ensuring the uniformity of sandblasting on the inner wall of the variable diameter pipeline to ensure the effect of sandblasting and rust removal, and when encountering the branch of the variable diameter pipeline, the pressures received by the two pressure sensors are different, so that the sandblasting nozzle temporarily stops sandblasting, reducing the probability of sand accumulation in the branch pipe of the variable diameter pipeline affecting its normal use; 2. Use the flexible cleaning piece to wipe off the soft impurities such as sludge on the inner wall of the pipe, use the circumferentially distributed second extrusion block to guide the first extrusion block, so that the hard cleaning piece moves back and forth to rub off the hard impurities on the inner wall of the variable diameter pipe, reduce the influence of the impurity coverage on the inner wall of the pipe on the sandblasting effect, and thus ensure the uniformity of sandblasting and rust removal at various locations on the inner wall of the pipe, and make the second extrusion block rotate relative to the first extrusion block in the opposite direction, thereby increasing the frequency of the reciprocating movement of the first extrusion block, and then speeding up the frequency of the reciprocating sliding of the hard cleaning piece, so as to enhance the strength of the hard cleaning piece to clean the inner wall of the variable diameter pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the mobile bracket of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the sandblasting nozzle of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the sliding rod of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the first extrusion block and the second extrusion block of the present invention.

[0016] Marked in the figure: 1-movable bracket, 2-sand pipe, 3-electrically controlled valve, 4-motor, 5-rotating tube, 6-guide frame, 7-sandblasting nozzle, 8-sliding rod, 9-detection frame, 10-pressure sensor, 11-flexible cleaning part, 12-adjusting frame, 1201-guide surface, 13-elastic telescopic rod, 14-hard cleaning part, 15-rotating ring, 16-first extrusion block, 17-second extrusion block. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0018] Example 1 The present embodiment discloses a sandblasting device for rust removal of metal parts, which is used for uniformly sandblasting the inner wall of a variable diameter pipe.

[0019] like Figures 1-4 As shown, it includes a sand pipe 2 arranged on a mobile bracket 1, the sand pipe 2 is connected to an external sand supply device not shown in the figure, the sand pipe 2 passes through the mobile bracket 1, and the axis of the sand pipe 2 is colinear with the axis of the mobile bracket 1, the sand pipe 2 is provided with a control terminal not shown in the figure, the external sand supply device is electrically connected to the control terminal, the mobile bracket 1 is an existing structure and is electrically connected to the control terminal, the sand pipe 2 is installed with an electric control valve 3, the electric control valve 3 is electrically connected to the control terminal, the electric control valve 3 is used to adjust the flow in the sand pipe 2, the sand pipe 2 is installed with a motor 4, the motor 4 is electrically connected to the control terminal, and the sand pipe 2 The right part is rotatably connected with a rotating tube 5 connected thereto, and the output shaft of the motor 4 and the rotating tube 5 are driven by a first gear set, wherein the first gear set is composed of two spur gears, one spur gear is fixedly connected to the output shaft of the motor 4, and the other spur gear is fixedly connected to the rotating tube 5. The motor 4 is provided with a protective shell rotatably connected to the rotating tube 5, and the first gear set is located in the protective shell. The rotating tube 5 is fixedly connected and connected with a guide frame 6, and the guide frame 6 is connected with a sandblasting nozzle 7. In the present embodiment, the guide frame 6 is fixedly connected to the sandblasting nozzle 7. In the figure, the nozzle for ejecting sand on the sandblasting nozzle 7 faces upward, so as to prevent the sandblasting nozzle 7 from being damaged. Figure 1The right view is the reference for the rotation direction. The rotation direction of the output shaft on the motor 4 is counterclockwise. The output shaft of the motor 4 drives the rotating pipe 5 to rotate clockwise through the first gear set, so that the flow guide frame 6 and the sand blasting nozzle 7 rotate clockwise. Two sliding rods 8 distributed circumferentially are slidably connected to the flow guide frame 6. A detection frame 9 is fixedly connected to the sliding rod 8. All the detection frames 9 are symmetrically distributed about the center. A pressure sensor 10 is installed on the side of the sliding rod 8 away from the detection frame 9. The pressure sensor 10 is electrically connected to the control terminal. If the pressures received by the two pressure sensors 10 increase simultaneously, the control terminal controls the electric control valve 3 to reduce the flow rate of the electric control valve 3. If the pressures received by the two pressure sensors 10 decrease simultaneously, the control terminal controls the electric control valve 3 to increase the flow rate of the electric control valve 3. If the pressure received by the rear pressure sensor 10 decreases alone, the control terminal closes the electric control valve 3 with a time delay. When the pressures received by the two pressure sensors 10 return to be the same, the control terminal controls the electric control valve 3 to open with a time delay. A first elastic member is fixedly connected between the pressure sensor 10 and the flow guide frame 6, and the first elastic member is a spring.

[0020] With Figure 1 The right view is the reference for the rotation direction. A slope and a collection groove are arranged in the clockwise direction of the detection frame 9. The collection groove of the detection frame 9 is used to collect impurities.

[0021] As Figure 2 With Figure 4 As shown, a flexible cleaning member 11 is fixedly connected to the side of the detection frame 9 away from the flow guide frame 6. The flexible cleaning member 11 is used to wipe and polish the inner wall of the pipeline.

[0022] The specific working principle is as follows: When the operator needs to use this device to remove rust and polish the inner wall of the variable-diameter pipeline, the operator inserts all the detection frames 9 into the variable-diameter pipeline. The variable-diameter pipeline squeezes the detection frame 9 to move. The detection frame 9 drives the pressure sensor 10 to move through the sliding rod 8. The first elastic member of the pressure sensor 10 is compressed. Place this device into the variable-diameter pipeline. The operator turns on the moving bracket 1, the external sand supply device, the motor 4 and the electric control valve 3 through the control terminal. The external sand supply device supplies sand to the sand blasting nozzle 7 through the sand pipe 2, the electric control valve 3, the rotating pipe 5 and the flow guide frame 6. At the same time, the output shaft of the motor 4 drives the rotating pipe 5 to rotate clockwise through the first gear set (the rotation direction in this embodiment is with Figure 1 the right view as the reference). The rotating pipe 5 drives the sand blasting nozzle 7 to rotate clockwise through the flow guide frame 6. After the sand blasting nozzle 7 rotates 360°, the moving bracket 1 drives the sand pipe 2 to move to the right. The sand pipe 2 drives the sand blasting nozzle 7 to move to the right through the rotating pipe 5 and the flow guide frame 6. During this process, the flow guide frame 6 drives the sand blasting nozzle 7 and the two sliding rods 8 to rotate continuously. Along with the moving bracket 1 moving to the right, continuous sand blasting and rust removal are carried out on the inner wall of the variable-diameter pipeline.

[0023] During the rightward movement of the sandblasting nozzle 7, the diversion frame 6 drives the two sliding rods 8 to move rightward. The two sliding rods 8 respectively drive the adjacent detection frames 9 to move rightward, and the sliding rods 8 drive the adjacent detection frames 9 to rotate during the rotation process. Taking the example of the diameter reduction of the pipeline when the detection frame 9 moves to the diameter-changing part of the stepped pipeline, the detection frame 9 is squeezed and displaced by the diameter-changing part of the pipeline. The detection frame 9 drives the sliding rod 8 to move, and the sliding rod 8 drives the pressure sensor 10 to move. The pressure sensor 10 squeezes its first elastic member, and the first elastic member between the pressure sensor 10 and the diversion frame 6 is compressed, causing the pressures received by the two pressure sensors 10 to increase simultaneously. The pressure sensor 10 outputs an electrical signal to the control terminal, and the control terminal controls the flow rate of the electric control valve 3 to decrease. The flow rate of the abrasive in the sand pipe 2 decreases, and the amount of abrasive supplied from the sand pipe 2 to the sandblasting nozzle 7 through the rotating pipe 5 and the diversion frame 6 decreases, so as to adjust the sandblasting amount at different diameters of the pipeline inner wall to adapt to the different sandblasting amounts required at each part of the stepped pipeline, thereby ensuring the uniformity of sandblasting on the inner wall of the stepped pipeline and ensuring the effect of sandblasting and rust removal.

[0024] When the rear detection frame 9 rotates circumferentially and moves rightward to the branch of the stepped pipeline, the first elastic member between the rear pressure sensor 10 and the adjacent diversion frame 6 pops out, causing the rear pressure sensor 10, the rear sliding rod 8, and the rear detection frame 9 to all move in the direction perpendicular to the axis of the sand pipe 2. The pressures received by the two pressure sensors 10 are different. The control terminal closes the electric control valve 3 with a time delay, that is, when the sandblasting nozzle 7 rotates to align with the branch of the stepped pipeline, the electric control valve 3 closes, causing the sandblasting nozzle 7 to temporarily stop sandblasting, reducing the probability that the abrasive accumulates in the branch pipe of the stepped pipeline and affects its subsequent normal use. Along with the rotation of the rear detection frame 9, the inclined surface of the rear detection frame 9 squeezes the branch of the stepped pipeline, causing the rear pressure sensor 10, the rear sliding rod 8, and the rear detection frame 9 to all move reversely in the direction perpendicular to the axis of the sand pipe 2. The first elastic member between the rear pressure sensor 10 and the adjacent diversion frame 6 is compressed. When the detection frame 9 disengages from the branch of the stepped pipeline, the pressures received by the two pressure sensors 10 return to the same level, and the control terminal controls the electric control valve 3 to open with a time delay, that is, when the sandblasting nozzle 7 rotates to be misaligned with the branch of the stepped pipeline, the electric control valve 3 opens.

[0025] During the rotation of the detection frame 9, the detection frame 9 drives the flexible cleaning member 11 to rotate. The flexible cleaning member 11 wipes and polishes the inner wall of the pipeline. The collection groove of the detection frame 9 temporarily collects the impurities wiped off by the flexible cleaning member 11 to reduce the probability that the impurities affect the sandblasted area. During the sandblasting process of the sandblasting nozzle 7, if the flexible impurities cover the inner wall of the pipeline, the flexible cleaning member 11 wipes off the flexible impurities such as sludge on the inner wall of the pipeline, reducing the influence of the flexible impurity coverage on the inner wall of the pipeline on the sandblasting effect.

[0026] After the inner wall of the pipeline is derusted, the operator closes the external sand supply equipment, the motor 4 and the electric control valve 3 through the control terminal, and controls the moving bracket 1 to move leftward through the control terminal. The moving bracket 1 moves leftward until it disengages from the reducing pipeline. The operator closes the moving bracket 1 through the control terminal, and finally cleans the device for the next use.

[0027] Embodiment 2 The present embodiment discloses a sandblasting device for derusting metal parts, which is further improved on the basis of Embodiment 1.

[0028] As Figures 2-4 shown, in the above embodiment, the diversion frame 6 is fixedly connected to the sandblasting nozzle 7. In this embodiment, the diversion frame 6 is slidably connected to the sandblasting nozzle 7. The sandblasting nozzle 7 is fixedly connected with an adjusting frame 12. The upper part of the adjusting frame 12 is made of flexible material so that the adjusting frame 12 fits different-diameter pipelines. A second elastic member is fixedly connected between the adjusting frame 12 and the diversion frame 6. The second elastic member is a spring. The adjusting frame 12 always presses against the inner wall of the pipeline. When sandblasting in a reducing pipeline, the distance between the sandblasting nozzle 7 and the inner wall of the pipeline remains unchanged. The adjusting frame 12 is provided with symmetrically distributed guiding surfaces 1201 in the front and back. During the rotation of the sandblasting nozzle 7, the sandblasting nozzle 7 drives the adjusting frame 12 to rotate. The guiding surfaces 1201 are squeezed by the branch of the reducing pipeline, so that the adjusting frame 12 is pressed to move, and the second elastic member of the adjusting frame 12 is compressed to prevent the adjusting frame 12 from being unable to move out after inserting into the branch of the reducing pipeline. The front and back sides of the adjusting frame 12 are used to block the scraped impurities to reduce the probability of impurities affecting the sandblasted area.

[0029] Embodiment 3 The present embodiment discloses a sandblasting device for derusting metal parts, which is further improved on the basis of Embodiment 2.

[0030] As Figures 2-4 shown, the detection frame 9 is fixedly connected with an elastic telescopic rod 13. The telescopic rod of the elastic telescopic rod 13 is fixedly connected with a rigid cleaning member 14. The rigid cleaning member 14 and the adjacent flexible cleaning member 11 are arranged in turn along the rotation direction of the diversion frame 6. The side of the rigid cleaning member 14 facing the inner wall of the pipeline is a friction surface, similar to a file structure. The rigid cleaning member 14 is used to clean hard impurities such as rust and scale on the inner wall of the pipeline.

[0031] As Figure 4 And Figure 5As shown, the rotating tube 5 is rotatably connected with the rotating ring 15, and the output shaft of the motor 4 and the rotating ring 15 are transmitted through the second gear set, wherein the second gear set is composed of three spur gears, the uppermost spur gear is fixedly connected to the output shaft of the motor 4, the middle spur gear is rotatably connected to the protective shell of the motor 4, and the lower spur gear is fixedly connected to the rotating ring 15. Since the number of gears of the first gear set on the output shaft of the motor 4 is an even number, and the number of gears of the second gear set on the output shaft of the motor 4 is an odd number, in the process of the rotating tube 5 driving the guide frame 6 to rotate, the guide frame 6 drives the first extrusion block 16 to rotate through the sliding rod 8, the detection frame 9, the elastic telescopic rod 13, the hard cleaning member 14 and the connecting rod, so that the first extrusion block 16 rotates around The axis of the rotating ring 15 rotates, and during the rotation of the first extrusion block 16, the rotation direction of the rotating ring 15 is opposite to the rotation direction of the rotating tube 5. The hard cleaning member 14 is fixedly connected to the first extrusion block 16 through a connecting rod, and the rotating ring 15 is fixedly connected to the second extrusion blocks 17 uniformly distributed in the circumferential direction. The first extrusion block 16 is provided with two symmetrically distributed inclined surfaces, and the second extrusion block 17 is provided with two symmetrically distributed inclined surfaces. During the rotation of the first extrusion block 16, the first extrusion block 16 moves along the two inclined surfaces of all the second extrusion blocks 17 in sequence, and all the second extrusion blocks 17 squeeze the first extrusion block 16 in sequence, so that the first extrusion block 16 slides back and forth left and right along the second extrusion block 17.

[0032] After the sliding rod 8 drives the detection frame 9 to slide, the positions of the elastic telescopic rod 13, the hard cleaning part 14, the connecting rod and the first extrusion block 16 change, so that the first extrusion block 16 slides compared to the adjacent second extrusion block 17, and the length of the second extrusion block 17 is greater than the length of the first extrusion block 16, so that the first extrusion block 16 is still in contact with the adjacent second extrusion block 17 after sliding.

[0033] The working principle of this embodiment is consistent with the above embodiment, and the specific working principle is as follows: During the rotation of the detection frame 9 around the axis of the sand pipe 2, the rear detection frame 9 drives the elastic telescopic rod 13 to rotate, and the telescopic end of the elastic telescopic rod 13 drives the hard cleaning component 14 to rotate around the axis of the sand pipe 2, and the hard cleaning component 14 scrapes off the hard impurities on the inner wall of the variable diameter pipe. During the rotation of the hard cleaning component 14 around the axis of the sand pipe 2, the hard cleaning component 14 drives the first extrusion block 16 to rotate around the axis of the sand pipe 2 through the connecting rod. The first extrusion block 16 passes through the inclined surfaces of all the second extrusion blocks 17 in turn, so that the first extrusion block 16 slides back and forth left and right. The first extrusion block 16 drives the hard cleaning component 14 to move back and forth left and right through the connecting rod. The hard cleaning component 14 moves back and forth to rub off the hard impurities on the inner wall of the variable diameter pipe, thereby reducing the influence of the hard impurities covering the inner wall of the pipe on the sandblasting effect, thereby ensuring the uniformity of sandblasting and rust removal at various locations on the inner wall of the pipe.

[0034] During the rotation of the first extrusion block 16 around the axis of the sand pipe 2, the output shaft of the motor 4 drives the rotating ring 15 to rotate through the second gear set. The rotating ring 15 drives all the second extrusion blocks 17 to rotate. The rotation direction of the second extrusion block 17 is opposite to that of the first extrusion block 16, so as to accelerate the reciprocating movement frequency of the first extrusion block 16. Furthermore, the first extrusion block 16 drives the rigid cleaning member 14 to slide left and right through the connecting rod, so as to accelerate the frequency of the rigid cleaning member 14 cleaning the inner wall of the variable-diameter pipe, and enhance the cleaning force of the rigid cleaning member 14 on the inner wall of the variable-diameter pipe.

[0035] After the rust removal of the inner wall of the pipe is completed, the operator closes the external sand supply equipment, the motor 4 and the electromagnetic control valve 3 through the control terminal, and controls the moving support 1 to move left through the control terminal. The moving support 1 moves left until it disengages from the variable-diameter pipe. The operator closes the moving support 1 through the control terminal, and finally cleans the device for the next use.

[0036] The above are only examples of the present invention and are not intended to limit the present invention. All equivalent replacements made within the principle of the present invention shall be included within the protection scope of the present invention. The content not elaborated in detail in the present invention belongs to the known prior art of those skilled in the art.

Claims

1. A sandblasting device for rust removal of metal parts, comprising a sand pipe (2) arranged on a moving bracket (1), an electric control valve (3) is installed on the sand pipe (2), and a motor (4) is installed on the sand pipe (2), characterized in that, A rotating pipe (5) communicating with the sand pipe (2) is rotatably connected to a position near the motor (4). The output shaft of the motor (4) is driven by a first gear set to the rotating pipe (5). The rotating pipe (5) is fixedly connected and communicated with a diversion frame (6), and the diversion frame (6) is communicated with a sand blasting nozzle (7). A plurality of sliding rods (8) distributed circumferentially are slidably connected to the diversion frame (6). A detection frame (9) is fixedly connected to the sliding rod (8). All the detection frames (9) are symmetrically distributed about the center. A pressure sensor (10) is installed on a side of the sliding rod (8) away from the detection frame (9). A first elastic member is fixedly connected between the pressure sensor (10) and the diversion frame (6).

2. The sandblasting device for rust removal of metal parts according to claim 1, wherein, On a side of the detection frame (9) facing the rotating direction of the diversion frame (6), an inclined surface and a collection groove are provided.

3. The sandblasting device for rust removal of metal parts according to claim 2, characterized in that, A flexible cleaning member (11) is fixedly connected to a side of the detection frame (9) away from the diversion frame (6).

4. A sandblasting device for rust removal of metal parts according to claim 3, characterized in that, The diversion frame (6) is slidably connected to the sand blasting nozzle (7). An adjustment frame (12) is fixedly connected to the sand blasting nozzle (7). A second elastic member is fixedly connected between the adjustment frame (12) and the diversion frame (6).

5. A sandblasting device for rust removal of metal parts according to claim 4, characterized in that, The adjustment frame (12) is provided with symmetrically distributed guiding surfaces (1201).

6. The sandblasting device for rust removal of metal parts according to claim 3, characterized in that, An elastic telescopic rod (13) is fixedly connected to the detection frame (9). A rigid cleaning member (14) is fixedly connected to the telescopic rod of the elastic telescopic rod (13).

7. A sandblasting device for rust removal of metal parts according to claim 6, characterized in that, The rigid cleaning member (14) and the adjacent flexible cleaning member (11) are arranged in sequence along the rotating direction of the diversion frame (6).

8. A sandblasting device for rust removal of metal parts according to claim 7, characterized in that, A rotating ring (15) is rotatably connected to the rotating pipe (5). The output shaft of the motor (4) is driven by a second gear set to the rotating ring (15). A first extrusion block (16) is fixedly connected to the rigid cleaning member (14) through a connecting rod. The rotating ring (15) is fixedly connected with second extrusion blocks (17) evenly distributed circumferentially. All the second extrusion blocks (17) are used for extruding the first extrusion block (16).

9. A sandblasting device for rust removal of metal parts according to claim 8, characterized in that, The length of the second extrusion block (17) is greater than the length of the first extrusion block (16).

10. A sandblasting device for rust removal of metal parts according to claim 8, characterized in that, Among the first gear set and the second gear set on the output shaft of the motor (4), the number of gears of one is even and the number of gears of the other is odd, so that the rotating direction of the rotating ring (15) is opposite to the rotating direction of the rotating pipe (5).

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