Self-walking type curved inner wall member water sand blasting rust removal device

Abstract

The application discloses a self-walking type water sand blasting rust removal device for a curved inner wall part, which comprises a leading ball and a sand blasting head mounting ball, and the connecting part of the leading ball and the sand blasting head mounting ball is connected through a ball hinge; a sand blasting head is rotatably installed on the side of the sand blasting head mounting ball away from the leading ball; the water sand blasting head further comprises a flexible high-pressure water sand supply pipe, and the water sand mixture leading-out end of the flexible high-pressure water sand supply pipe is rotatably connected with the liquid inlet end of the sand blasting head; the water sand blasting head has the advantages of simple structure and the ability to thoroughly remove rust from the inner wall of a curved pipe structure.

Description

Technical Field

[0001] This invention belongs to the field of rust removal. Background Technology

[0002] Water blasting technology utilizes the principle of high-pressure water mixed with sand to remove rust. The rust removal process is carried out in high-pressure water, which will not damage the surface of the parts. It has high processing efficiency, is clean and environmentally friendly, and does not generate dust. In existing water blasting rust removal equipment, it is generally only used to remove rust from the outer surface of the workpiece. When the workpiece is a curved pipe structure and the rust removal target is the inner wall of the curved pipe, the existing water blasting rust removal process is difficult to complete. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, the present invention provides a water-jet sandblasting rust removal device for curved inner wall parts based on self-propelled type, which can achieve thorough rust removal of the inner wall of curved pipe structure.

[0004] Technical Solution: To achieve the above objectives, the present invention provides a self-propelled water-jet sandblasting rust removal device for curved inner wall components, comprising a leading ball and a sandblasting head mounting ball, wherein the leading ball and the sandblasting head mounting ball are connected by a ball joint; a sandblasting head is rotatably mounted on the side of the sandblasting head mounting ball away from the leading ball; and further comprising a flexible high-pressure water-sand supply pipe, wherein the water-sand mixture outlet end of the flexible high-pressure water-sand supply pipe is rotatably connected to the liquid inlet end of the sandblasting head.

[0005] Furthermore, the device includes a curved pipe with an inner wall to be derusted, the inside of which is a curved pipe channel. The reaction force generated by the blasting head drives the adaptive sandblasting and rust removal assembly formed by the leading ball, the sandblasting head mounting ball, and the sandblasting head to move along the curved direction in the curved pipe channel.

[0006] Furthermore, let the outer diameter of the leading sphere and the sandblasting head mounting sphere both be D1, and the inner diameter of the curved pipe channel be D2; satisfying D1+1mm>D2>D1, so that the outer wall surface of the leading sphere and the sandblasting head mounting sphere slides into the inner wall of the curved pipe channel.

[0007] Furthermore, several jet nozzles are distributed along the axis on the side of the sandblasting head away from the sandblasting head mounting ball. A nozzle drive motor is installed inside the sandblasting head mounting ball, and the nozzle drive motor drives the sandblasting head to rotate along the axis through the output shaft.

[0008] Furthermore, the ball joint includes a ball, a club, and a ball joint seat.

[0009] Furthermore, let's define a three-dimensional coordinate system XYZ, with its origin O at the center of the rotating sphere, and the X-axis of the three-dimensional coordinate system XYZ coinciding with the axis of the sandblasting head.

[0010] When the adaptive sandblasting and rust removal component is in the curved pipe channel, under the constraint of the inner wall of the curved pipe channel, neither the leading ball nor the sandblasting head mounting ball can rotate around the Y-axis / Z-axis, so that the sandblasting head mounted on the sandblasting head mounting ball can only rotate around the X-axis.

[0011] A linear electric telescopic device parallel to the X-axis is fixedly installed inside the sandblasting head mounting ball. The telescopic rod of the linear electric telescopic device is equipped with a push head. When the telescopic rod extends, the push head pushes against the outer spherical surface of the leading ball. Under the interaction force of the pushing action of the telescopic rod, the leading ball and the sandblasting head mounting ball tend to rotate in opposite directions along the Y-axis. However, the inner wall of the curved pipe channel prevents the leading ball and the sandblasting head mounting ball from rotating around the Y-axis / Z-axis. As a result, the outer walls of the leading ball and the sandblasting head mounting ball form a pressure against the inner wall of the curved pipe channel, thereby increasing the maximum static friction between the outer walls of the leading ball and the sandblasting head mounting ball and the inner wall of the curved pipe channel. The friction between the sandblasting head mounting ball and the inner wall of the curved pipe channel inhibits the rotation of the sandblasting head mounting ball around the X-axis.

[0012] Furthermore, by periodically controlling the retraction and extension of the telescopic rod, the adaptive sandblasting and rust removal component periodically sprays in place, moves forward a section, sprays in place, moves forward a section... in the curved pipe channel until all parts of the inner wall of the curved pipe channel are thoroughly rusted.

[0013] Beneficial effects: The present invention has a simple structure and can thoroughly remove rust from the inner wall of the curved pipe structure. The adaptive sandblasting rust removal component periodically sprays in place, moves a section, sprays in place, moves a section, etc. in the curved pipe channel until all parts of the inner wall of the curved pipe channel are thoroughly rusted. Attached Figure Description

[0014] Appendix Figure 1 This is a schematic diagram illustrating the operation of this device.

[0015] Appendix Figure 2 A three-dimensional schematic diagram of the adaptive sandblasting and rust removal component when the telescopic rod is not extended;

[0016] Appendix Figure 3 A three-dimensional schematic diagram of the adaptive sandblasting and rust removal component when the telescopic rod has been extended;

[0017] Appendix Figure 4 For the appendix Figure 3 A sectional view;

[0018] Appendix Figure 5 This is a diagram illustrating the disassembly of the sandblasting head;

[0019] Appendix Figure 6 For the appendix Figure 5 An enlarged view of mark 10;

[0020] Appendix Figure 7For the appendix Figure 6 A sectional view. Detailed Implementation

[0021] The invention will now be further described with reference to the accompanying drawings.

[0022] As attached Figures 1 to 7 The self-propelled water-blasting rust removal device for curved inner wall components shown includes a leading ball 6 with a uniform outer diameter and a blasting head mounting ball 7. The leading ball 6 and the blasting head mounting ball 7 are connected by a ball joint, as shown below. Figure 4 The ball joint includes a rotating ball 33, a ball rod 31, and a ball joint seat 32. The ball rod 31 is fixed on the rotating ball 33, and the rotating ball 33 rotates in the rotating ball receiving chamber within the ball joint seat 32. The ball rod 31 is fixedly connected to the leading ball 6, and the ball joint seat 32 is fixedly connected to the sandblasting head mounting ball 7. A sandblasting head 8 is rotatably mounted on the side of the sandblasting head mounting ball 7 away from the leading ball 6. It also includes a flexible high-pressure water-sand supply pipe 5, and the water-sand mixture outlet end of the flexible high-pressure water-sand supply pipe 5 is rotatably connected to the liquid inlet end of the sandblasting head 8. In the specific working process, it is necessary to use an external hose retraction device to keep the flexible high-pressure water-sand supply pipe 5 in a non-tight state, so that the flexible high-pressure water-sand supply pipe 5 never exerts substantial tension on the sandblasting head 8.

[0023] like Figure 1 The system includes a curved pipe 3 with rust to be removed from its inner wall, and a curved pipe channel 2 inside the curved pipe 3. The reaction force generated by the spraying of the sandblasting head 8 drives the adaptive sandblasting and rust removal assembly 1, which is formed by the pilot ball 6, the sandblasting head mounting ball 7, and the sandblasting head 8, to move along the curved direction in the curved pipe channel 2.

[0024] Let the outer diameter of the leading sphere 6 and the sandblasting head mounting sphere 7 both be D1, and the inner diameter of the curved pipe channel 2 be D2; satisfy D1+1mm>D2>D1, so that the outer wall surface of the leading sphere 6 and the sandblasting head mounting sphere 7 slides with the inner wall of the curved pipe channel 2 with a clearance fit. In this case, D2 can be 10cm.

[0025] like Figure 5 A nozzle receiving groove 23 is provided on the side of the sandblasting head mounting ball 7 away from the leading ball 6. The conical sandblasting head 8 is placed in the nozzle receiving groove 23. Several jet nozzles 16 are distributed in a circular array along the axis on the side of the conical sandblasting head 8 away from the sandblasting head mounting ball 7. When the adaptive sandblasting and rust removal component 1 is in the curved pipe channel 2, the water and sand mixture liquid sprayed from the several jet nozzles 16 is obliquely sprayed towards the inner wall of the curved pipe channel 2 in the form of a high-speed jet. A nozzle drive motor 22 is fixedly installed inside the sandblasting head mounting ball 7. The output shaft 21 of the nozzle drive motor 22 is coaxially fixedly connected to the sandblasting head 8. The nozzle drive motor 22 drives the sandblasting head 8 to rotate along the axis through the output shaft 21.

[0026] like Figure 2Let there be a three-dimensional coordinate system XYZ, with the origin O of the three-dimensional coordinate system XYZ at the center of the rotating sphere 33, and the X-axis of the three-dimensional coordinate system XYZ coinciding with the axis of the sandblasting head 8;

[0027] When the adaptive sandblasting and rust removal component 1 is in the curved pipe channel 2, under the constraint of the inner wall of the curved pipe channel 2, neither the leading ball 6 nor the sandblasting head mounting ball 7 can rotate around the Y-axis / Z-axis. This means that the sandblasting head 8 mounted on the sandblasting head mounting ball 7 can only rotate around the X-axis. As a result, during the process of the adaptive sandblasting and rust removal component 1 traveling along the curved path in the curved pipe channel 2, the attitude of the sandblasting head 8 relative to the inner wall of the curved pipe channel 2 at its location remains consistent. This ensures that the water-sand mixture liquid ejected from the several jet nozzles 16 is always obliquely sprayed toward the inner wall of the curved pipe channel 2.

[0028] A linear electric telescopic device 14 parallel to the X-axis is fixedly installed inside the sandblasting head mounting ball 7. A push head 12 is provided at the end of the telescopic rod 13 of the linear electric telescopic device 14. When the telescopic rod 13 extends, the push head 12 pushes against the outer spherical surface of the leading ball 6. Under the interaction force of the pushing action of the telescopic rod 13, the leading ball 6 and the sandblasting head mounting ball 7 tend to rotate in opposite directions along the Y-axis. However, the inner wall of the curved pipe channel 2 prevents the leading ball 6 and the sandblasting head mounting ball 7 from rotating around the Y-axis / Z-axis. As a result, the outer wall surfaces of the leading ball 6 and the sandblasting head mounting ball 7 form a pressure against the inner wall of the curved pipe channel 2, thereby increasing the maximum static friction between the outer wall surfaces of the leading ball 6 and the sandblasting head mounting ball 7 and the inner wall surface of the curved pipe channel 2. The friction between the sandblasting head mounting ball 7 and the inner wall surface of the curved pipe channel 2 inhibits the rotation of the sandblasting head mounting ball 7 around the X-axis.

[0029] like Figure 7 The sandblasting head 8 has a liquid inlet channel 19 arranged along the axial direction. Several diversion channels 15 are arrayed along the axial direction inside the sandblasting head 8. Each diversion channel 15 connects one end of the liquid inlet channel 19 to each jet nozzle 16. The inlet end of the diversion channel 15 is provided with a liquid inlet nozzle 18. The outlet end of the water-sand mixture of the flexible high-pressure water-sand supply pipe 5 is connected to a liquid outlet nozzle 41. The liquid outlet nozzle 41 and the liquid inlet nozzle 18 are rotatably sealed and connected by a sealing bearing 17.

[0030] Work methods:

[0031] Initially, telescopic rod 13 is in the retracted state, such as... Figure 2The relative relationship between the leading ball 6 and the sandblasting head mounting ball 7 of the adaptive sandblasting rust removal component 1 is that both can rotate freely around the center of the ball 33; then the adaptive sandblasting rust removal component 1 is placed in the curved pipe channel 2 of the curved pipe 3 to be rusted, and in order to ensure that the adaptive sandblasting rust removal component 1 can move adaptively in the curved pipe channel 2, in the subsequent process, the flexible high-pressure water sand supply pipe 5 is always kept in a non-tight state through the external hose retraction device, so that the flexible high-pressure water sand supply pipe 5 never exerts substantial tension on the sandblasting head 8;

[0032] After the adaptive sandblasting and rust removal component 1 is placed in the curved pipe channel 2 of the curved pipe 3 to be rusted, the connection between the leading ball 6 and the sandblasting head mounting ball 7 is made by a ball joint. Under the constraint of the inner wall of the curved pipe channel 2, the leading ball 6 and the sandblasting head mounting ball 7 move adaptively in the curved pipe channel 2. Both the leading ball 6 and the sandblasting head mounting ball 7 slide with the inner wall of the curved pipe channel 2. Under the combined constraint of the inner wall of the curved pipe channel 2 and the ball joint, the leading ball 6 and the sandblasting head mounting ball 7 cannot rotate around the Y-axis / Z-axis. As a result, during the process of the adaptive sandblasting and rust removal component 1 moving along the curved pipe channel 2, the attitude of the sandblasting head 8 relative to the inner wall of the curved pipe channel 2 at its position remains consistent. This ensures that the water-sand mixture liquid sprayed from the several jet nozzles 16 is always obliquely sprayed toward the inner wall of the curved pipe channel 2.

[0033] At this time, the extension of the control telescopic rod 13 is as follows: Figure 3 The pusher head 12 pushes the outer spherical surface of the pilot ball 6 with force. Under the interaction force of the push action of the telescopic rod 13, the pilot ball 6 and the sandblasting head mounting ball 7 will generate a tendency to rotate in opposite directions along the Y-axis. The inner wall of the curved tube channel 2 prevents the pilot ball 6 and the sandblasting head mounting ball 7 from rotating around the Y-axis / Z-axis. As a result, the outer wall surfaces of the pilot ball 6 and the sandblasting head mounting ball 7 form a top pressure with the inner wall of the curved tube channel 2, thereby increasing the maximum static friction between the outer wall surfaces of the pilot ball 6 and the sandblasting head mounting ball 7 and the inner wall surface of the curved tube channel 2. The friction between the sandblasting head mounting ball 7 and the inner wall surface of the curved tube channel 2 also inhibits the rotation of the sandblasting head mounting ball 7 around the X-axis, preventing the nozzle drive motor 22 inside the sandblasting head mounting ball 7 from rotating.

[0034] The flexible high-pressure water-sand supply pipe 5 continuously pressurizes a mixture of fine sand and water into the inlet channel 19, causing the water-sand mixture ejected from the jet nozzles 16 on the blasting head 8 to be obliquely directed towards the inner wall of the curved pipe channel 2. This causes the rust spots on the inner wall of the curved pipe channel 2 at that location to be washed away by the high-speed water-sand jet until they regain their shine. At the same time, the nozzle drive motor 22 drives the blasting head 8 to rotate along the X-axis through the output shaft 21, so that the jet nozzles 16 spray more evenly onto the inner wall of the curved pipe channel 2. At this time, although the reaction force generated by the jets 16 of the blasting head 8 causes the adaptive sandblasting rust removal component to... 1. In the curved pipe channel 2, there is a tendency to travel along the curved direction. At this time, the top head 12 pushes the outer spherical surface of the leading ball 6. The outer wall surfaces of the leading ball 6 and the sandblasting head mounting ball 7 are pressed against the inner wall of the curved pipe channel 2. At this time, the static friction between the outer wall surfaces of the leading ball 6 and the sandblasting head mounting ball 7 and the inner wall surface of the curved pipe channel 2 prevents the adaptive sandblasting rust removal component 1 from traveling along the curved direction in the curved pipe channel 2. This causes the adaptive sandblasting rust removal component 1 to enter a braking state in the curved pipe channel 2. Therefore, the adaptive sandblasting rust removal component 1 sprays in place at this time and thoroughly removes rust from the inner wall of the curved pipe channel 2 at its location.

[0035] After the adaptive sandblasting and rust removal component 1 has been spraying in place for a sufficient time, the inner wall of the curved pipe channel 2 at its location has been completely rusted and is as clean as new. Therefore, the adaptive sandblasting and rust removal component 1 needs to move forward a short distance along the direction of travel of the curved pipe channel 2 in order to spray the inner wall of other areas of the curved pipe channel 2.

[0036] When the adaptive sandblasting rust removal component 1 needs to travel a short distance along the curved path in the curved pipe channel 2, the control telescopic rod 13 retracts and then quickly extends again. During the time interval between the retraction and extension of the telescopic rod 13, the outer spherical surface of the leading ball 6 of the top head 12 enters the separation state, causing the original interaction force to disappear. The maximum static friction between the outer wall of the leading ball 6 and the sandblasting head mounting ball 7 and the inner wall of the curved pipe channel 2 suddenly decreases, causing the adaptive sandblasting rust removal component 1 to release the braking state in the curved pipe channel 2. The reaction force generated by the spray of each jet nozzle 16 of the sandblasting head 8 causes the adaptive sandblasting rust removal component 1 to travel a distance along the curved path in the curved pipe channel 2. As the telescopic rod 13 extends again, the adaptive sandblasting rust removal component 1 re-enters the braking state from the traveling state. The adaptive sandblasting rust removal component 1 re-enters the stationary spraying state and removes rust from the inner wall of the curved pipe channel 2 at this location.

[0037] According to the above pattern, the adaptive sandblasting and rust removal component 1 periodically sprays in place, moves a short distance, sprays in place, moves a short distance... in the curved pipe channel 2 until all parts of the inner wall of the curved pipe channel 2 are completely rusted.

[0038] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A self-propelled water-jet sandblasting rust removal device for curved inner wall components, characterized in that: It comprises a leading sphere (6) and a sand blasting head mounting sphere (7), the connection between the leading sphere (6) and the sand blasting head mounting sphere (7) is connected through a spherical hinge; the sand blasting head (8) is rotatably mounted on the side of the sand blasting head mounting sphere (7) away from the leading sphere (6); it further comprises a flexible high-pressure water sand supply pipe (5), the water sand mixture outlet end of the flexible high-pressure water sand supply pipe (5) is rotatably connected with the liquid inlet end of the sand blasting head (8); It comprises a curved pipe (3) with an inner wall to be derusted, the curved pipe (3) is a curved pipe channel (2), the reaction force generated by the spraying of the sand blasting head (8) drives the self-adaptive sand blasting derusting assembly (1) formed by the leading sphere (6), the sand blasting head mounting sphere (7) and the sand blasting head (8) to travel in the curved pipe channel (2) along the curved direction; The side of the sand blasting head (8) away from the sand blasting head mounting sphere (7) is provided with a plurality of jet nozzles (16), the sand blasting head mounting sphere (7) is provided with a nozzle driving motor (22), and the nozzle driving motor (22) drives the sand blasting head (8) to rotate along the axis through an output shaft (21). The spherical hinge comprises a rotating ball (33), a spherical rod (31) and a spherical hinge seat (32). A three-dimensional coordinate system XYZ is arranged, the origin O of the three-dimensional coordinate system XYZ is at the center of the rotating ball (33), and the X-axis of the three-dimensional coordinate system XYZ coincides with the axis of the sand blasting head (8); when the self-adaptive sand blasting derusting assembly (1) is in the curved pipe channel (2), the leading sphere (6) and the sand blasting head mounting sphere (7) cannot rotate around the Y-axis / Z-axis under the constraint of the inner wall of the curved pipe channel (2), so that the sand blasting head (8) mounted on the sand blasting head mounting sphere (7) can only rotate around the X-axis; A linear electric telescopic device (14) parallel to the X-axis is fixedly mounted in the sand blasting head mounting sphere (7), and a pushing head (12) is arranged at the end of the telescopic rod (13) of the linear electric telescopic device (14); the telescopic rod (13) is extended, so that the pushing head (12) pushes the outer spherical surface of the leading sphere (6); under the interaction force of the pushing action of the telescopic rod (13), the leading sphere (6) and the sand blasting head mounting sphere (7) respectively generate a rotating motion trend in the opposite rotating direction along the Y-axis, the inner wall of the curved pipe channel (2) prevents the leading sphere (6) and the sand blasting head mounting sphere (7) from rotating around the Y-axis / Z-axis, and then the outer walls of the leading sphere (6) and the sand blasting head mounting sphere (7) are all in abutment with the inner wall of the curved pipe channel (2), so that the maximum static friction force between the outer walls of the leading sphere (6) and the sand blasting head mounting sphere (7) and the inner wall of the curved pipe channel (2) is increased, and the friction force between the sand blasting head mounting sphere (7) and the inner wall of the curved pipe channel (2) inhibits the rotation of the sand blasting head mounting sphere (7) around the X-axis.

2. The self-walking based curved inner wall member water sand blasting rust removal device according to claim 1, characterized in that: The outer diameters of the leading sphere (6) and the sand blasting head mounting sphere (7) are both D1, and the inner diameter of the curved pipe channel (2) is D2; D1+1mm>D2>D1 is met.

3. The working method of the water sand blasting derusting device based on the curved inner wall member according to claim 2, characterized in that: By periodically controlling the retraction and extension of the telescopic rod (13), the self-adaptive sand blasting derusting assembly (1) periodically sprays, travels a distance, sprays again, travels a distance, and so on in the curved pipe channel (2); Until the inner wall of the curved pipe channel (2) is completely derusted.

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