A grinder for the inner wall of a cylinder

Abstract

A kind of polisher for cylinder inner wall, including have: polishing unit, with the polishing head for polishing cylinder inner wall surface;For supporting the base of polishing unit;Two active walking wheels, respectively set in the left and right sides of the base, and at least part of each active walking wheel is downwardly protruding relative to the lower surface of base, simultaneously, each active walking wheel can be rotated around the axis extending left and right of itself under the drive of respective corresponding drive mechanism to drive base to move;Two first magnetic blocks, left and right protrude on the lower surface of the base, and located between two active walking wheels, and the protruding size of each first magnetic block relative to the lower surface of base is less than the protruding size of the active walking wheel relative to the lower surface of base, so that when active walking wheel is supported on cylinder inner wall surface, each first magnetic block is spaced relative to cylinder inner wall surface, and polisher is adsorbed on cylinder inner wall surface by magnetic attraction force.The utility model can automatically polish cylinder inner wall surface.

Description

Technical Field

[0001] This utility model belongs to the field of grinding machine technology, specifically relating to a grinding machine for the inner wall of a cylinder. Background Technology

[0002] The existing grinding of the inner wall of the cylinder, especially the weld seams, is generally done manually using a high-powered grinding machine. The noise and dust generated during grinding are harmful to the human body, and the grinding efficiency is low.

[0003] If the existing mobile trolley with a grinding unit is used to enter the cylinder for grinding the inner wall, the vibration generated during grinding will often cause the mobile trolley to vibrate or even move, making the grinding operation impossible. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a grinding machine for the inner wall of a cylinder, which can automatically grind the weld seams on the inner wall surface of the cylinder, especially the inner wall surface, in light of the current state of the technology.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a grinding machine for the inner wall of a cylinder, comprising:

[0006] The grinding unit has a grinding head for grinding the inner wall surface of the cylinder;

[0007] A base for supporting the grinding unit;

[0008] Its characteristic is that it also includes:

[0009] Two active walking wheels are respectively located on the left and right sides of the base, and at least part of each active walking wheel protrudes downward relative to the lower surface of the base. At the same time, each active walking wheel can rotate around its own left and right extended axis under the drive of its corresponding drive mechanism, thereby driving the base to move.

[0010] Two first magnetic blocks are protruding from the lower surface of the base, one on the left and one on the right, and located between the two active walking wheels. The protrusion of each first magnetic block relative to the lower surface of the base is smaller than the protrusion of the active walking wheel relative to the lower surface of the base. This is so that when the active walking wheel is supported on the inner wall of the cylinder, each first magnetic block is spaced apart from the inner wall of the cylinder and the grinder is attracted to the inner wall of the cylinder by magnetic attraction.

[0011] In this invention, although the first magnetic block is spaced apart from the inner wall of the cylinder, the magnetic force of the first magnetic block is relatively large, and it can generate magnetic attraction with the inner wall of the cylinder (the inner wall of the cylinder is a ferromagnetic material that can attract the magnetic block), thereby adsorbing the grinder onto the inner wall of the cylinder.

[0012] In this invention, the drive mechanism can use an existing servo motor and worm gear reducer. When the servo motor stops working, the worm gear reducer can lock the active walking wheel to prevent the active walking wheel from rotating.

[0013] In use, the grinder is located inside the cylinder and is attracted to the inner wall of the cylinder by the magnetic force of the first magnetic blocks. This allows the grinding unit to grind the inner wall of the cylinder, especially the welds on the inner wall. Because the two first magnetic blocks protrude from the lower surface of the base, one on the left and one on the right, and are located between the two active wheels, the grinder, attracted to the inner wall of the cylinder, is prevented from swaying or even shifting relative to the inner wall due to vibration during grinding. When grinding needs to be done in a different position, the drive mechanism drives the active wheels to rotate, moving the base and the grinding unit on the base within the cylinder. Since each active wheel in this invention is equipped with its own drive mechanism, driving force is guaranteed, allowing the drive mechanism to effectively drive the base to move. Furthermore, when the two drive mechanisms operate at differential speeds, the two active wheels rotate at different speeds, which can cause the base to steer.

[0014] Preferably, two active walking wheels are arranged on the front side of the base; it also includes a driven walking wheel, which at least partially protrudes downward relative to the lower surface of the base and is located behind the active walking wheels, so as to support the base together with the active walking wheels and be able to rotate about its own left and right extending axis when the base moves.

[0015] Preferably, the diameter of the driven wheel is smaller than the diameter of the driving wheel, and the two protrude the same size relative to the lower surface of the base. The larger diameter driving wheel can better drive the base to move.

[0016] Preferably, the driven wheels are located at the center of the lower surface of the base in the left-right direction, forming a triangle with the two active wheels at their three vertices. This allows for three-point support within the cylinder, ensuring stability while enabling the base to move flexibly along the inner wall of the cylinder.

[0017] Furthermore, it also includes two second magnetic blocks located behind the first magnetic block. These two second magnetic blocks protrude from the lower surface of the base, one on the left and one on the right, and are positioned on either side of the driven wheel. The protrusion of each second magnetic block relative to the lower surface of the base is smaller than the protrusion of the driving wheel and the driven wheel relative to the lower surface of the base. This allows the grinder to adhere more stably to the inner wall of the cylinder.

[0018] In the above embodiments, preferably, the lower surface of the base is provided with a protective cover corresponding to the position of each magnetic block. Each protective cover is hollow inside to form a cavity with an open top, so that the corresponding magnetic block can be placed in the cavity. The top of the cavity is connected to the lower surface of the base so that the open top of the cavity is closed by the lower surface of the base.

[0019] The protective cover can confine the magnetic block to the lower surface of the base, and at the same time protect the magnetic block from being attracted by the material that was polished off.

[0020] In the above embodiments, preferably, the polishing unit includes:

[0021] The driven wheel and the power wheel are arranged one in front of the other. The power wheel rotates under the drive of a motor, and the axis of rotation extends to the left and right.

[0022] A sanding belt is wound around the driven wheel and the power wheel in the front-to-back direction, and can rotate back and forth under the drive of the power wheel and drive the driven wheel to rotate.

[0023] The portion of the sanding belt corresponding to the driven wheel is the grinding head of the grinding unit.

[0024] The abrasive belt can be an existing 40-mesh ceramic abrasive belt, which is characterized by its sharpness, high cutting speed, low heat generation, and durability. The cutting produces fine, filamentous iron filings. Compared to other existing grinding methods (which produce fine dust that can damage the equipment if it enters), these fine iron filings are easier to manage, reducing equipment damage.

[0025] Preferably, the driven wheel is located below the power wheel, so that the grinding head of the grinding unit is tilted downwards and extends forward relative to the base.

[0026] Preferably, it also includes a first power source capable of driving the grinding unit to move left and right relative to the base. That is, the grinding unit can move along the width direction of the sanding belt, improving grinding efficiency.

[0027] Preferably, it also includes a second power source capable of driving the grinding unit to move back and forth relative to the base. This allows for adjustment of the grinding depth of the sanding belt on the surface being ground.

[0028] Compared with existing technologies, the advantages of this invention are as follows: By setting active traveling wheels on the left and right sides of the base and two first magnetic blocks on the lower surface of the base, the grinder is located inside the cylinder during use and is attracted to the inner wall of the cylinder by the magnetic force of the first magnetic blocks. This allows the grinding unit to grind the inner wall of the cylinder, especially the weld seams on the inner wall. Furthermore, because the two first magnetic blocks protrude from the lower surface of the base on the left and right, and are located between the two active traveling wheels, the grinder attracted to the inner wall of the cylinder is prevented from shaking or even shifting relative to the inner wall due to vibration during grinding. When grinding needs to be moved to a different position, the drive mechanism drives the active traveling wheels to rotate, thus moving the base and the grinding unit on the base within the cylinder. Since each active traveling wheel in this invention is equipped with its own drive mechanism, driving force is guaranteed, allowing the drive mechanism to effectively drive the base to move. Additionally, when the two drive mechanisms operate at differential speeds, the two active traveling wheels rotate at different speeds, which can cause the base to steer. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the grinding machine according to an embodiment of the present utility model;

[0030] Figure 2 This is a schematic diagram of the grinding machine from another perspective according to an embodiment of the present utility model;

[0031] Figure 3 This is a cross-sectional view of the grinder according to an embodiment of the present utility model (the cross-section is a vertical plane extending to the left and right);

[0032] Figure 4 This is a cross-sectional view of the grinder according to an embodiment of the present utility model (the cross-section is a vertical plane extending from front to back);

[0033] Figure 5 This is a diagram showing the usage state of the grinder according to an embodiment of the present invention;

[0034] Figure 6 This is a partial structural diagram of the grinding machine and the inner wall of the cylinder according to an embodiment of the present invention. Detailed Implementation

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0036] like Figures 1-6 As shown, this is a preferred embodiment of a grinding machine for the inner wall of a cylinder according to the present invention. The grinding machine includes a grinding unit 1, a base 2, an active traveling wheel 3, a magnetic block, a driven traveling wheel 5, and a cover 6.

[0037] like Figure 4As shown, the grinding unit 1 includes a base 16, a support shaft 17, a driven wheel 11, a power wheel 12, a grinding belt 13, and an adjusting wheel 14. The support shaft 17 extends upward from front to back and is rotatably mounted on the base 16 around its own central axis. The support shaft 17 has a structure that can extend and retract back and forth. The support shaft 17 has an outer shaft 171 with a hollow interior, an inner shaft 172 with its rear end inserted in the outer shaft 171, and a spring 173. The spring 173 is located in the outer shaft 171, and the two ends of the spring 173 act on the rear end of the inner shaft 172 and the rear end of the outer shaft 171, respectively, so that the inner shaft 172 always has a tendency to move forward relative to the outer shaft 171. The base 16 is similar to a clamp structure, which is tightly clamped to the outer circumference of the outer shaft 171 of the support shaft 17. The base 16 can be loosened when needed (such as by loosening the bolts on the clamp) so that the support shaft 17 as a whole can rotate around its own central axis under the drive of external force. (To avoid relative circumferential rotation between the outer shaft 171 and the inner shaft 172, a strip hole extending along the length of the outer shaft 171 can be provided on the side wall of the outer shaft 171. A protrusion is provided on the outer side of the inner shaft 172. The protrusion is inserted into the strip hole and can move along the strip hole, so as not to affect the back-and-forth movement of the inner shaft 172 relative to the outer shaft 171.) Driven wheel 11 and drive wheel 12 are respectively positioned at the two ends of support shaft 17 (driven wheel 11 is located at the front end of inner shaft 172, and drive wheel 12 is located at the rear end of outer shaft 171). Driven wheel 12 rotates under the drive of a motor fixedly connected to outer shaft 171 of support shaft 17, and its rotation axis extends left and right. Abrasive belt 13 is wound around the driven wheel 11 and drive wheel 12 in the front-back direction, and can rotate back and forth under the drive of drive wheel 12, driving driven wheel 11 to rotate. Similarly, the rotation axis of driven wheel 11 extends left and right. The part of abrasive belt 13 corresponding to driven wheel 11 is the grinding head 10 of grinding unit 1, used to grind the inner wall surface 9 of cylinder. In this embodiment, the height of driven wheel 11 is lower than the height of drive wheel 12, so that grinding head 10 of grinding unit 1 is tilted downwards. The aforementioned adjusting wheel 14 is located between the driven wheel 11 and the power wheel 12, and within the inner circumference of the sanding belt 13. The circumferential surface of the adjusting wheel 14 is in contact with the sanding belt 13. Driven by a telescopic mechanism 15 (such as a hydraulic cylinder, electric cylinder, etc.) fixedly connected to the outer shaft 171 of the support shaft 17, the adjusting wheel 14 can telescopically move relative to the sanding belt 13 to adjust the tension of the sanding belt 13. In this embodiment, the support shaft 17 can be manually driven to rotate, thereby rotating the driven wheel 11, the power wheel 12, the sanding belt 13, the adjusting wheel 14, and the telescopic mechanism 15 together to adjust the angle of the grinding head 10. Figure 4The abrasive belt 13 at the grinding head 10 extends horizontally and is basically parallel to the horizontal plane. When the support shaft 17 rotates a certain angle, the width direction of the abrasive belt 13 at the grinding head 10 tilts vertically relative to the left and right directions, forming an angle with the horizontal plane. This is particularly suitable for grinding the weld 91 at the junction of two inner wall surfaces with different inner diameters inside the grinding cylinder, as shown in the following figure. Figure 6 As shown. The support shaft 17 can be rotated according to the inclination direction of the weld to adjust the inclination direction of the sand belt 13 at the grinding head 10. Figure 6 In this embodiment, L represents the width of the sanding belt 13, and the width direction of the sanding belt 13 is inclined relative to the horizontal plane (i.e., the inner wall surface 9 of the cylinder). In this embodiment, the support shaft 17, which can extend and retract, can provide a buffering force for the grinding head 10 during operation.

[0038] like Figures 1-4 As shown, the cover 6 is fitted around the periphery of the grinding unit 1, and the grinding head 10 of the grinding unit 1 is exposed.

[0039] The base 2 supports the base 16 of the grinding unit 1, and the grinding head 10 of the grinding unit 1 extends forward relative to the base 2. In this embodiment, the grinding unit 1 can move left and right relative to the base 2 under the drive of the first power source; the grinding unit 1 can also move back and forth relative to the base 2 under the drive of the second power source (i.e., the arrangement direction of the driven wheel 11 and the power wheel 12 is: tilted upward from front to back). Specifically, as shown... Figure 3 , 4 As shown, the base 2 is provided with a base frame 20 that can move left and right. The base frame 20 is provided with a second rack 22 that is inclined upward from front to back and fixed relative to the base frame 20. The base 16 of the grinding unit 1 is provided with a second motor (the housing of the second motor is fixed relative to the base 16 of the grinding unit 1). The rotating shaft of the second motor is connected to a second gear 221. The second gear 221 meshes with the second rack 22 so that when the rotating shaft of the second motor rotates, it can drive the grinding unit 1 to move along the second rack 22. That is, the second motor, the second gear 221 and the second rack 22 constitute the second power source mentioned above. Meanwhile, the base 2 is provided with a first rack 21 that extends left and right and is fixed relative to the base 2. The base frame 20 is provided with a first motor (the housing of the first motor is fixed relative to the base frame 20). The shaft of the first motor is connected to a first gear 211. The first gear 211 meshes with the first rack 21 so that when the shaft of the first motor rotates, it can drive the base frame 20, the second rack 22, the second gear 221, the second motor and the grinding unit 1 to move together along the first rack 21. The first motor, the first gear 211 and the first rack 21 constitute the first power source mentioned above.

[0040] like Figures 1-4As shown, there are two active walking wheels 3, which are respectively located on the left and right sides of the base 2 (the two active walking wheels 3 are located on the front side of the base 2). Each active walking wheel 3 has a portion that protrudes downward relative to the lower surface of the base 2. Each active walking wheel 3 can rotate around its own left and right extended axis under the drive of its corresponding drive mechanism 30, thereby moving the base 2.

[0041] There is one driven wheel 5, which protrudes downward relative to the lower surface of the base 2 (the diameter of the driven wheel 5 is smaller than the diameter of the driven wheel 3, and the protrusion size of both relative to the lower surface of the base 2 is the same), and is located behind the driven wheel 3. The driven wheel 5 is located in the center of the lower surface of the base 2 in the left-right direction, so as to form a triangle with the two driven wheels 3 at the three vertices, so that the driven wheel 5 can support the base 2 together with the driven wheel 3, and can rotate around its own left-right extending axis when the base 2 moves.

[0042] There are four magnetic blocks: two first magnetic blocks 41 and two second magnetic blocks 42. The two first magnetic blocks 41 protrude from the lower surface of the base 2, one on the left and one on the right, and are located between the two driving wheels 3. The protrusion of each first magnetic block 41 relative to the lower surface of the base 2 is smaller than the protrusion of each driving wheel 3 relative to the lower surface of the base 2. This ensures that when the driving wheels 3 and driven wheels 5 are supported on the inner wall 9 of the cylinder, each first magnetic block 41 is spaced apart from the inner wall 9 and the grinder is magnetically attracted to the inner wall 9. The two second magnetic blocks 42 are located behind the first magnetic blocks 41, protruding from the lower surface of the base 2, one on the left and one on the right, and are located on either side of the driven wheels 5. The protrusion of each second magnetic block 42 relative to the lower surface of the base 2 is smaller than the protrusion of each driving wheel 3 and driven wheel 5 relative to the lower surface of the base 2. When the active walking wheel 3 and the driven walking wheel 5 are supported on the inner wall surface 9 of the cylinder, each of the second magnetic blocks 42 is spaced apart from the inner wall surface 9 of the cylinder and the grinder is attracted to the inner wall surface 9 of the cylinder by magnetic attraction.

[0043] In this embodiment, as Figure 3 As shown, in order to protect the magnetic blocks and prevent the material from being ground off from adsorbing onto the surface of the magnetic blocks, a protective cover 40 is provided on the lower surface of the base 2 corresponding to the position of each magnetic block. Each protective cover 40 is hollow inside to form a cavity 400 with an open top, so that the corresponding magnetic block can be placed in the cavity 400. The top of the cavity 400 is connected to the lower surface of the base 2 so that the open top of the cavity 400 is closed by the lower surface of the base 2.

[0044] In this embodiment, the magnetic block is a strong magnetic block (a magnet with a large magnetic force, such as a magnet with a magnetic force of 2000 gauss or more), and the design of the protective cover 40 will not affect the magnetic attraction of the strong magnetic block. Even if the strong magnetic block is spaced apart from the inner wall surface 9 of the cylinder, the entire grinder can be magnetically attracted to the inner wall surface 9 of the cylinder. At the same time, the magnetic block spaced apart from the inner wall surface 9 of the cylinder will not affect the movement of the grinder.

[0045] When sanding, such as Figure 5 As shown, the grinder can first be raised to the position of the cylinder via a lifting platform. Then, the drive mechanism 30 drives the active travel wheel 3 to rotate, causing the grinder to move to the desired grinding position inside the cylinder. Next, the grinding head 10 of the grinding unit 1 controls the forward, backward, left, and right movement of the grinding unit 1 to perform the grinding operation. The forward, backward, left, and right movement function of the grinding unit 1 eliminates the need for precise movement of the grinder to the desired position; it can be achieved simply by moving the grinding unit 1 forward, backward, left, and right, simplifying operation. Furthermore, the left and right movement of the grinder (i.e., the sanding belt 13 moves horizontally along its width) allows for even wear on the working surface of the sanding belt 13, avoiding prolonged concentrated grinding in one position and extending the service life of the sanding belt.

[0046] In this embodiment, the drive mechanism 30 can use an existing servo motor and worm gear reducer. When the servo motor stops working, the worm gear reducer can lock the active walking wheel to prevent the active walking wheel 3 from rotating.

[0047] In the specification and claims of this utility model, terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A grinding machine for the inner wall of a cylinder, comprising: The grinding unit (1) has a grinding head (10) for grinding the inner wall surface (9) of the cylinder. A base (2) for supporting the grinding unit (1); Its features It also includes: Two active walking wheels (3) are respectively located on the left and right sides of the base (2), and at least part of each active walking wheel (3) protrudes downward relative to the lower surface of the base (2). At the same time, each active walking wheel (3) can rotate around its own left and right extended axis under the drive of its corresponding drive mechanism (30) and drive the base (2) to move. Two first magnetic blocks (41) are protruding from the lower surface of the base (2) on the left and right, and located between the two active walking wheels (3). The protrusion size of each first magnetic block (41) relative to the lower surface of the base (2) is smaller than the protrusion size of the active walking wheel (3) relative to the lower surface of the base (2), so that when the active walking wheel (3) is supported on the inner wall surface (9) of the cylinder, each first magnetic block (41) is spaced apart from the inner wall surface (9) of the cylinder and the grinder is attracted to the inner wall surface (9) of the cylinder by magnetic attraction.

2. The grinding machine according to claim 1, characterized in that: Two active walking wheels (3) are arranged on the front side of the base (2); it also includes a driven walking wheel (5), which at least partially protrudes downward relative to the lower surface of the base (2) and is located behind the active walking wheels (3) to support the base (2) together with the active walking wheels (3) and can rotate around its own left and right extending axis when the base (2) moves.

3. The grinding machine according to claim 2, characterized in that: The diameter of the driven wheel (5) is smaller than the diameter of the active wheel (3), and the protrusion dimensions of the two relative to the lower surface of the base (2) are the same.

4. The grinding machine according to claim 2, characterized in that: The driven wheel (5) is located in the center of the lower surface of the base (2) in the left-right direction, arranged in a triangle with the two active wheels (3) at the three vertices.

5. The grinding machine according to claim 4, characterized in that: It also includes two second magnetic blocks (42) located behind the first magnetic block (41). The two second magnetic blocks (42) protrude from the lower surface of the base (2) on the left and right sides, and are located on both sides of the driven walking wheel (5). The protrusion size of each second magnetic block (42) relative to the lower surface of the base (2) is smaller than the protrusion size of the driving walking wheel (3) and the driven walking wheel (5) relative to the lower surface of the base (2).

6. The grinding machine according to any one of claims 1 to 5, characterized in that: The lower surface of the base (2) is provided with a protective cover (40) corresponding to the position of each magnetic block. Each protective cover (40) is hollow inside to form a cavity (400) with an open top, so that the corresponding magnetic block can be placed in the cavity (400). The top of the cavity (400) is connected to the lower surface of the base (2) so that the open top of the cavity (400) is closed by the lower surface of the base (2).

7. The grinding machine according to any one of claims 1 to 5, characterized in that: The polishing unit (1) includes: The driven wheel (11) and the power wheel (12) are arranged one in front of the other. The power wheel (12) rotates under the drive of the motor, and the rotation axis extends to the left and right. A sanding belt (13) is wound around the driven wheel (11) and the power wheel (12) in the front-back direction, and can rotate back and forth under the drive of the power wheel (12) and drive the driven wheel (11) to rotate. The portion of the sanding belt (13) corresponding to the driven wheel (11) is the grinding head (10) of the grinding unit (1).

8. The grinding machine according to claim 7, characterized in that: The driven wheel (11) is located below the power wheel (12) so that the grinding head (10) of the grinding unit (1) is tilted downward and extends forward relative to the base (2).

9. The grinding machine according to claim 7, characterized in that: It also includes a first power source capable of driving the polishing unit (1) to move left and right relative to the base (2).

10. The grinding machine according to claim 7, characterized in that: It also includes a second power source capable of driving the polishing unit (1) to move back and forth relative to the base (2).

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