Pipe inner wall grinding and polishing device and method

Abstract

The invention discloses a pipe inner wall grinding and polishing device and method, and relates to the field of pipe machining. A plurality of grinding and polishing assemblies can be sequentially arranged on a main supporting piece in the length direction of the main supporting piece; each grinding and polishing body comprises a first driving device, a connecting plate and at least one elastic component; the end, away from the main supporting piece, of each first driving device is provided with at least one limiting face, and the output end of each first driving device and each limiting face are arranged on the side, away from the main supporting piece, of the corresponding connecting plate. The two ends of each elastic component can abut against the corresponding limiting face and the side, away from the main supporting piece, of the corresponding connecting plate correspondingly, and each first driving device can move in the direction perpendicular to the length direction of the main supporting piece relative to the corresponding connecting plate. The grinding and polishing precision of the grinding and polishing head of the first grinding and polishing piece of any two adjacent grinding and polishing assemblies is not higher than that of the grinding and polishing head of the second grinding and polishing piece, and the grinding and polishing precision of the grinding and polishing heads of at least two grinding and polishing assemblies is different. The grinding and polishing effect is good and the grinding and polishing efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of pipe processing, and in particular to a pipe inner wall grinding and polishing device and method. Background Art

[0002] At present, the grinding heads of the pipe inner wall grinding and polishing devices are mostly rigid grinding heads. Grinding and polishing the inner wall of the pipe with a rigid grinding head is prone to cause large vibrations, resulting in uneven contact between the rigid grinding head and the inner wall of the pipe, thereby damaging the inner wall of the pipe and affecting the grinding and polishing efficiency. In addition, the traditional pipe inner wall grinding and polishing device only includes a first-level grinding head, that is, it can only perform one form of processing such as rough grinding and fine grinding on the inner wall of the pipe. If you want to obtain a better processing effect, you need to use a grinding and polishing device equipped with grinding heads of different grinding levels for multiple grinding. For example, after using a grinding and polishing device equipped with a first-level grinding head to complete the rough grinding of the inner wall, use a grinding and polishing device equipped with a second-level grinding head to perform fine grinding of the inner wall. The processing process is relatively complicated and the efficiency is low. Summary of the invention

[0003] The purpose of the present invention is to provide a device and method for grinding and polishing the inner wall of a pipe, so as to solve the problems existing in the prior art, prevent the inner wall from being damaged, improve the grinding and polishing effect, and improve the grinding and polishing efficiency.

[0004] To achieve the above object, the present invention provides the following solutions: The present invention provides a pipe inner wall grinding and polishing device, comprising a main support and at least two grinding and polishing assemblies, wherein a plurality of the grinding and polishing assemblies can be sequentially arranged on the main support along the length direction of the main support; each of the grinding and polishing assemblies comprises at least one grinding and polishing body, and each of the grinding and polishing bodies comprises a grinding and polishing support assembly, a grinding and polishing head, a first driving device, a connecting plate and at least one elastic component; each of the connecting plates is fixedly connected to the corresponding grinding and polishing support assemblies; each of the first driving devices is connected to the corresponding connecting plates, and at least one limiting surface is arranged at one end of each of the first driving devices away from the main support, and the output end of each of the first driving devices and each of the limiting surfaces are arranged on one side of the corresponding connecting plates away from the main support; both sides of each of the elastic components The ends can respectively abut against the corresponding limiting surfaces and the corresponding connecting plates on a side away from the main support member, and each of the first driving devices can generate movement perpendicular to the length direction of the main support member relative to the corresponding connecting plates; each of the grinding and polishing heads is fixedly connected to the output ends of the corresponding first driving devices; the one close to the first end of the main support member in any two adjacent grinding and polishing assemblies is a first grinding and polishing part, and the one close to the second end of the main support member in any two adjacent grinding and polishing assemblies is a second grinding and polishing part; the grinding and polishing accuracy of the grinding and polishing head of the first grinding and polishing part of any two adjacent grinding and polishing assemblies is not higher than the grinding and polishing accuracy of the grinding and polishing head of the second grinding and polishing part, and the grinding and polishing accuracy of the grinding and polishing heads of at least two grinding and polishing assemblies are different.

[0005] Preferably, each of the polishing support assemblies is a telescopic assembly capable of extending and retracting in a direction perpendicular to the center line of the main support member.

[0006] Preferably, each of the grinding and polishing support assemblies includes a guide member, a lifting member and a second driving device, one end of each of the guide members is connected to the main support member, and the other end of each of the guide members extends in a direction perpendicular to the center line of the main support member toward a direction away from the main support member; each of the lifting members is slidably connected to the corresponding guide members; each of the second driving devices is connected to the corresponding lifting members, and each of the second driving devices can drive the corresponding lifting members to slide along the corresponding guide members and maintain their positions.

[0007] Preferably, each of the polishing assemblies comprises at least three polishing bodies.

[0008] Preferably, each of the grinding and polishing components also includes a protective cover, and a plurality of the protective covers can be fixedly connected to the main support member in sequence along the length direction of the main support member; each of the grinding and polishing bodies of each of the grinding and polishing components is provided with one end of the grinding and polishing head arranged outside the corresponding protective covers, and the other end of each of the grinding and polishing bodies of each of the grinding and polishing components is fixedly connected inside the corresponding protective covers.

[0009] Preferably, it also includes at least two control devices, each of which corresponds to the grinding and polishing components one by one, and each of the control devices is signal-connected with each of the first driving devices and each of the second driving devices of the corresponding grinding and polishing components; each of the control devices can control the corresponding each of the first driving devices to be turned on or off; each of the control devices can control the corresponding each of the second driving devices to be turned on or off.

[0010] Preferably, each of the first driving devices and each of the second driving devices is a motor, and each of the control devices can control the rotation speed of the corresponding each of the first driving devices and each of the second driving devices.

[0011] Preferably, each of the grinding and polishing assemblies further includes at least one locking piece, and each of the connecting plates is provided with a guide groove which penetrates each of the connecting plates in a direction perpendicular to the length of the main support member, and each of the first driving devices is sleeved in the corresponding guide groove; the locking piece can pass through the mounting holes of each of the first driving devices and the corresponding connecting plates in sequence from one end of each of the first driving devices away from the corresponding connecting plate, so that each of the first driving devices can be movably connected with the corresponding connecting plate; each of the first driving devices can move along the corresponding guide groove under the action of external force or the elastic force of the elastic component.

[0012] Preferably, there are at least three grinding and polishing assemblies, each of the grinding and polishing heads of at least one of the grinding and polishing assemblies is a rough grinding head, each of the grinding and polishing heads of at least one of the grinding and polishing assemblies is a medium grinding head, and each of the grinding and polishing heads of at least one of the grinding and polishing assemblies is a fine grinding head.

[0013] The present invention provides a method for polishing the inner wall of a pipe based on the inner wall polishing device of the pipe, comprising the following steps: making each polishing head of each polishing assembly contact with the inner wall of the pipe, moving the main support member along the axial direction of the pipe, and making the polishing heads of multiple polishing assemblies on the main support member polish the same pipe section with different polishing accuracies in turn; when each polishing head contacts the inner wall of the pipe, each first driving device can move toward the direction approaching the main support member under the squeezing force of the inner wall of the pipe, or move toward the direction away from the main support member under the elastic force of the corresponding elastic member.

[0014] Compared with the prior art, the present invention has achieved the following technical effects: The present invention provides a pipe inner wall grinding and polishing device and method, comprising at least two grinding and polishing assemblies, wherein the plurality of grinding and polishing assemblies can be sequentially arranged on a main support shaft along the length direction of a main support member; each grinding and polishing assembly comprises at least one grinding and polishing body, wherein each grinding and polishing body comprises a grinding and polishing support assembly, a grinding and polishing head, a first driving device, a connecting plate and at least one elastic component; each connecting plate is fixedly connected to each corresponding grinding and polishing support assembly; each first driving device and each corresponding connecting plate form a sliding connection in a direction perpendicular to the main support member, and the output end of each first driving device is arranged on a side of each corresponding connecting plate away from the main support member, and each first driving device is away from At least one limiting surface is provided at one end of the main support member; the two ends of each elastic member can respectively abut against the corresponding limiting surfaces and the corresponding connecting plate on the side away from the main support member; each grinding and polishing head is fixedly connected to the output end of each corresponding first driving device; the one close to the first end of any two adjacent grinding and polishing components is the first grinding and polishing component, and the one close to the second end of any two adjacent grinding and polishing components is the second grinding and polishing component; the grinding and polishing accuracy of the grinding and polishing head of the first grinding and polishing component of any two adjacent grinding and polishing components is not higher than the grinding and polishing accuracy of the grinding and polishing head of the second grinding and polishing component, and the grinding and polishing accuracy of the grinding and polishing heads of at least two grinding and polishing components are different.

[0015] Since the inner wall of the pipe is relatively rough, when the grinding and polishing head contacts the larger protrusion of the inner wall of the pipe, the elastic component can be squeezed by the first driving device to compress the elastic component. When the grinding and polishing head contacts the flatter position or larger depression of the inner wall of the pipe, the elastic component can stretch, so that the first driving device moves away from the main support shaft, and the grinding and polishing head moves toward the inner wall of the pipe, so that the grinding and polishing head can float according to the shape of the inner wall of the pipe, so that the grinding and polishing head can better contact the inner wall, prevent damage to the inner wall, and improve the grinding and polishing effect. The grinding and polishing heads of each grinding and polishing assembly on the main support shaft can grind the same pipe section in turn. Since the grinding precision of the grinding and polishing heads is different, and the grinding precision of the grinding and polishing heads is getting higher and higher from the first end to the second end of the main support shaft, in one grinding process, the grinding and polishing heads with different grinding and polishing precisions can perform rough grinding, fine grinding and other processing in turn, which is more efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of the structure of the tube inner wall grinding and polishing device provided in Example 1; Figure 2Schematic diagram of the structure of the grinding and polishing assembly provided in Example 1 Figure 1 ; Figure 3 Schematic diagram of the structure of the grinding and polishing body provided in Example 1 Figure 1 ; Figure 4 Schematic diagram of the structure of the grinding and polishing assembly provided in Example 1 Figure 2 ; Figure 5 Schematic diagram of the structure of the grinding and polishing body provided in Example 1 Figure 2 ; In the figure: 100, pipe inner wall grinding and polishing device; 1, main support member; 2, grinding and polishing body; 201, grinding and polishing support assembly; 202, grinding and polishing head; 203, first driving device; 204, connecting plate; 205, elastic member; 206, limiting surface; 207, guide member; 208, lifting member; 209, second driving device; 210, groove; 211, guide groove; 3, protective cover; 4, first nut; 5, gasket; 6, base. DETAILED DESCRIPTION

[0018] 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.

[0019] The purpose of the present invention is to provide a device and method for grinding and polishing the inner wall of a pipe, so as to solve the problems existing in the prior art, prevent the inner wall from being damaged, improve the grinding and polishing effect, and improve the grinding and polishing efficiency.

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Example 1 like Figures 1 to 5As shown, the present embodiment provides a pipe inner wall grinding and polishing device 100, comprising a main support member 1 and at least two grinding and polishing assemblies, wherein the plurality of grinding and polishing assemblies can be sequentially arranged on the main support member 1 along the length direction of the main support member 1; each grinding and polishing assembly comprises at least one grinding and polishing body 2, wherein each grinding and polishing body 2 comprises a grinding and polishing support assembly 201, a grinding and polishing head 202, a first driving device 203, a connecting plate 204 and at least one elastic component 205; each connecting plate 204 is fixedly connected to the corresponding grinding and polishing support assembly 201; each first driving device 203 is connected to the corresponding connecting plate 204, and at least one limiting surface 206 is arranged at one end of each first driving device 203 away from the main support member 1, and the output end of each first driving device 203 and each limiting surface 206 are arranged at the corresponding connecting plate 204 away from the main support member 1. One side of the support member 1; the two ends of each elastic component 205 can respectively abut against the corresponding limiting surface 206 and the corresponding connecting plate 204 away from the side of the main support member 1, and each first driving device 203 can move in a direction perpendicular to the length of the main support member 1 relative to the corresponding connecting plate 204; each polishing head 202 is fixedly connected to the output end of each corresponding first driving device 203; the one close to the first end of the main support member 1 in any two adjacent polishing assemblies is the first polishing part, and the one close to the second end of the main support member 1 in any two adjacent polishing assemblies is the second polishing part; the polishing accuracy of the polishing head 202 of the first polishing part of any two adjacent polishing assemblies is not higher than the polishing accuracy of the polishing head 202 of the second polishing part, and the polishing accuracy of the polishing heads 202 of at least two polishing assemblies is different. It should be noted that the polishing support assembly 201, the polishing head 202, the first driving device 203, the connecting plate 204 and the elastic component 205 of each polishing body 2 are in a corresponding relationship.

[0022] Since the inner wall of the pipe is relatively rough, when the grinding and polishing head 202 contacts the larger protrusions on the inner wall of the pipe, the elastic component 205 can be squeezed by the first driving device 203, so that the elastic component 205 is compressed. When the grinding and polishing head 202 contacts the flatter position or larger depression of the inner wall of the pipe, the elastic component 205 can be reset and extended to a certain extent, so that the first driving device 203 moves away from the main support axis and the grinding and polishing head 202 moves toward the inner wall of the pipe, so that the grinding and polishing head 202 can float according to the shape of the inner wall of the pipe, so that the grinding and polishing head 202 can better contact the inner wall, prevent damage to the inner wall, and improve the grinding and polishing effect. The grinding and polishing heads 202 of each grinding and polishing assembly on the main support member 1 can grind the same pipe section in turn. Since the grinding precision of the grinding and polishing heads 202 of at least two grinding and polishing assemblies is different, and the grinding precision of the grinding and polishing heads 202 becomes higher and higher from the first end to the second end of the main support member 1, in one grinding process, the grinding and polishing heads 202 with different grinding and polishing precisions can perform rough grinding, fine grinding and other processing on the same pipe section in turn, with high efficiency.

[0023] In this embodiment, each grinding and polishing support assembly 201 is a telescopic assembly that can be extended and retracted in a direction perpendicular to the center line of the main support member 1, so that the distance from the grinding and polishing head 202 to the main support axis can be adjusted to adapt to the processing of pipes with different inner diameters, and the application is flexible.

[0024] As a preferred embodiment, each polishing support assembly 201 includes a guide 207, a lifting member 208, and a second drive device 209. One end of each guide 207 is connected to the main support 1, and the other end of each guide 207 extends in a direction perpendicular to the center line of the main support 1 and away from the main support 1; each lifting member 208 is slidably connected to the corresponding guide 207; each second drive device 209 is connected to the corresponding lifting member 208, and each second drive device 209 can drive the corresponding lifting member 208 to slide along the corresponding guide 207 and maintain the position. The guide 207, the lifting member 208, and the second drive device 209 of each polishing support assembly 201 are in a corresponding relationship.

[0025] As a preferred embodiment, the lifting member 208 is cylindrical, the guide member 207 is columnar, the cross-section of the guide member 207 is polygonal, such as roughly rectangular, and the end of the lifting member 208 away from the grinding and polishing head 202 is provided with a groove 210 extending along the length direction of the lifting member 208, and the side ridges of each guide member 207 correspond one by one to the groove 210 of the corresponding lifting member 208, and each side ridge of each guide member 207 can extend into a groove 210 of the corresponding lifting member 208, and the two outer side walls of each guide member 207 connected to each side ridge are respectively in contact with the two limiting edges of the corresponding groove 210, and each limiting edge is two edges on the inner wall of the corresponding groove 210 extending along the length direction of the lifting member 208, so as to limit the rotation of the lifting member 208 along its own center line, guide the lifting member 208, and make the lifting member 208 move along its own center line.

[0026] In this embodiment, each polishing assembly includes at least three polishing bodies 2. As a preferred embodiment, each polishing assembly includes four polishing bodies 2. In this embodiment, multiple polishing bodies 2 are arranged in the axial direction and the circumferential direction, which increases the coverage area of ​​a single processing, shortens the processing time, and significantly improves the overall work efficiency.

[0027] In this embodiment, each grinding and polishing component also includes a protective cover 3, and multiple protective covers 3 can be fixedly connected to the main support member 1 in sequence along the length direction of the main support member 1; each grinding and polishing body 2 of each grinding and polishing component is provided with a grinding and polishing head 202, one end of which is arranged outside the corresponding protective cover 3, and the other end of each grinding and polishing body 2 of each grinding and polishing component is fixedly connected inside the corresponding protective cover 3.

[0028] In this embodiment, at least two control devices are also included. The control devices correspond to the grinding and polishing components one by one. Each control device is signal-connected with the first drive device 203 and the second drive device 209 of the corresponding grinding and polishing component; each control device can control the corresponding first drive device 203 to be turned on or off; each control device can control the corresponding second drive device 209 to be turned on or off.

[0029] In this embodiment, each first drive device 203 and each second drive device 209 are motors, wherein the second drive device 209 is a linear motor, and each control device can control the rotation speed of each corresponding first drive device 203 and each second drive device 209. Each polishing assembly is equipped with a control device to control the first drive device 203 and the second drive device 209 of each polishing assembly to achieve independent control; for example, the rotation speeds of the first drive devices 203 of multiple polishing assemblies can be different to meet different processing requirements.

[0030] In this embodiment, each control device is fixedly connected to each corresponding protective cover 3. The protective cover 3 can protect the control device, the second drive device 209, etc. to a certain extent. It should be noted that the control device is not limited to being set in the protective cover 3, and other settings can also be adopted as long as the control of the first drive device 203 and the second drive device 209 can be achieved. For example, it can be set outside the pipe, and each control device and the corresponding first drive device 203 and the second drive device 209 are connected by wires to achieve signal connection.

[0031] In this embodiment, there are at least three grinding and polishing assemblies, each grinding and polishing head 202 of at least one grinding and polishing assembly is a rough grinding head, each grinding and polishing head 202 of at least one grinding and polishing assembly is a medium grinding head, and each grinding and polishing head 202 of at least one grinding and polishing assembly is a fine grinding head.

[0032] As a preferred embodiment, the coarse grinding head and the medium grinding head are both diamond grinding wheels, the fine grinding head is a shutter blade, and the mesh number of the coarse grinding head is smaller than the mesh number of the medium grinding head. For example, there are five grinding and polishing assemblies, with the forward direction of the tube inner wall grinding and polishing device 100 as the front end, the grinding and polishing heads 202 of the first two grinding and polishing assemblies of the main support member 1 are both 36 mesh diamond grinding wheels, the grinding and polishing heads 202 of the third grinding and polishing assembly on the main support member 1 are both 60 mesh diamond grinding wheels, and the grinding and polishing heads 202 of the last two grinding and polishing assemblies on the main support member 1 are both 60 mesh shutter blades. The main support member 1 is the main support shaft.

[0033] In this embodiment, each polishing body 2 further includes a base 6 , and one end of each guide member 207 of each polishing support assembly 201 away from the polishing head 202 is fixedly connected to the corresponding base 6 , and each base 6 is fixedly connected to the corresponding protective cover 3 .

[0034] In this embodiment, the output shaft of each first driving device 203 is a stepped shaft, and each stepped shaft includes a first shaft section and a second shaft section that are connected to each other. The outline size of the first shaft section of each stepped shaft is larger than the outline size of the corresponding second shaft section of each stepped shaft, and each first shaft section is connected to the driving body of the corresponding first driving device 203; a grinding and polishing head 202 is provided on the outer sleeve of each second shaft section, and a gasket 5 and a first nut 4 are sequentially arranged on the side of the grinding and polishing head 202 away from the first shaft section, and the first nut 4 is threadedly connected to the second shaft section to lock the grinding and polishing head 202.

[0035] In this embodiment, each grinding and polishing assembly also includes at least one locking piece, and each connecting plate 204 is provided with a guide groove 211 that penetrates each connecting plate 204 along a direction perpendicular to the length of the main support member 1, and each first driving device 203 is sleeved in the corresponding guide groove 211; the locking piece can pass through the mounting holes of each first driving device 203 and the corresponding connecting plate 204 in sequence from one end of each first driving device 203 away from the corresponding connecting plate 204, so that each first driving device 203 is movably connected with the corresponding connecting plate 204. When the pipe inner wall grinding and polishing device 100 is installed in the pipe, each elastic component 205 is in a compressed state, and each first driving device 203 can move along the corresponding guide groove 211 under the action of external force or the elastic force of the elastic component 205.

[0036] In this embodiment, each polishing body 2 includes four elastic components 205 and four locking members. The elastic components 205 are preferably springs, which are evenly distributed on the outer periphery of the first drive device 203. Each locking member includes a bolt and a second nut. The bolt can pass through the mounting hole of the first drive device 203, the spring intermediate cavity and the mounting hole of the connecting plate 204, and then connect with the second nut. The locking member can realize the connection between each first drive device 203 and the corresponding connecting plate 204, but will not affect the movement of each first drive device 203. When the polishing head 202 contacts the raised position of the inner wall of the pipe, the polishing head 202 is subjected to a radial force away from the inner wall of the pipe and transmitted to the first drive device 203. The first drive device 203 moves along the guide groove 211 to squeeze the elastic component 205. When the polishing head 202 contacts the flat or concave position of the inner wall of the pipe, the first drive device 203 moves in the opposite direction under the elastic force of the elastic component 205 to better contact the inner wall of the pipe.

[0037] The configuration of the polishing head 202 of this embodiment can be adjusted according to different requirements to achieve the best polishing coverage area and efficiency.

[0038] This embodiment is applicable to the grinding and polishing of the inner walls of various pipe materials such as steel pipes.

[0039] Example 2 The present embodiment provides a method for polishing the inner wall of a pipe based on the inner wall polishing device 100 of the first embodiment, comprising the following steps: making each polishing head 202 of each polishing assembly contact with the inner wall of the pipe, moving the main support member 1 along the axial direction of the pipe, and making the polishing heads 202 of the multiple polishing assemblies on the main support member 1 perform polishing with different polishing accuracies on the same pipe section in turn; when each polishing head 202 contacts the inner wall of the pipe, each first driving device 203 can move closer to the inner wall of the pipe under the extrusion force of the inner wall of the pipe. The polishing head 202 moves in the direction of the main support 1, or moves away from the main support 1 under the elastic force of the corresponding elastic component 205, so that each polishing head 202 can achieve adaptive contact with the inner wall of the pipe, that is, when the polishing head 202 moves to the convex part of the inner wall of the pipe, the polishing head 202 moves in the direction close to the main support 1, and when the polishing head 202 moves to the concave part of the inner wall of the pipe, the polishing head 202 moves away from the main support 1, and the polishing head 202 floats following the undulations of the inner wall of the pipe.

[0040] As a feasible implementation method, the method for grinding and polishing the inner wall of a pipe in this embodiment includes: Step 1: The grinding and polishing heads 202 of the first two grinding and polishing assemblies use 36-mesh diamond grinding wheels, and the grinding and polishing heads 202 of the third grinding and polishing assemblies use 60-mesh diamond grinding wheels; the grinding and polishing heads 202 of the last two grinding and polishing assemblies use 60-mesh shutter blades. Set the rotation speed of the pipe inner wall grinding and polishing device 100 to 40 rad / min, and the feed speed to 2 mm / s, that is, set the rotation speed of the driving component of the main support member 1 to 40 rad / min, and the feed speed to 2 mm / s; set the first driving device 203 of the first three grinding and polishing assemblies to forward rotation, and the first driving device 203 of the last two grinding and polishing assemblies to reverse rotation; set the rotation speed of the first driving device 203 of the first two grinding and polishing assemblies to 6000 rpm, the rotation speed of the first driving device 203 of the third grinding and polishing assemblies to 6000 rpm, and the rotation speed of the first driving device 203 of the last two grinding and polishing assemblies to 5000 rpm. Move the grinding and polishing head 202 at the front end of the main support member 1 to the starting position of the inner wall of the pipe; Step 2: Start the pipe inner wall grinding and polishing device 100, which feeds at a set speed, and the grinding and polishing heads 202 of all the grinding and polishing assemblies on the main support member 1 grind the same pipe section in turn.

[0041] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A pipe inner wall grinding and polishing device, characterized in that: It comprises a main support and at least two grinding and polishing assemblies, and a plurality of the grinding and polishing assemblies can be sequentially arranged on the main support along the length direction of the main support; each of the grinding and polishing assemblies comprises at least one grinding and polishing body, and each of the grinding and polishing bodies comprises a grinding and polishing support assembly, a grinding and polishing head, a first driving device, a connecting plate and at least one elastic component; each of the connecting plates is fixedly connected to the corresponding grinding and polishing support assemblies; each of the first driving devices is connected to the corresponding connecting plates, and at least one limiting surface is arranged at one end of each of the first driving devices away from the main support; the output end of each of the first driving devices and each of the limiting surfaces are arranged on one side of the corresponding connecting plates away from the main support; the two ends of each of the elastic components can be respectively connected to the corresponding The limiting surface abuts against the side of the corresponding connecting plate away from the main support member, and each of the first driving devices can generate movement perpendicular to the length direction of the main support member relative to the corresponding connecting plate; each of the grinding and polishing heads is fixedly connected to the output end of the corresponding first driving device; the one close to the first end of the main support member in any two adjacent grinding and polishing assemblies is a first grinding and polishing member, and the one close to the second end of the main support member in any two adjacent grinding and polishing assemblies is a second grinding and polishing member; the grinding and polishing accuracy of the grinding and polishing head of the first grinding and polishing member of any two adjacent grinding and polishing assemblies is not higher than the grinding and polishing accuracy of the grinding and polishing head of the second grinding and polishing member, and the grinding and polishing accuracy of the grinding and polishing heads of at least two grinding and polishing assemblies is different.

2. The tube inner wall grinding and polishing device according to claim 1, characterized in that: Each of the polishing support assemblies is a telescopic assembly that can be telescoped in a direction perpendicular to the center line of the main support member.

3. The tube inner wall grinding and polishing device according to claim 1, characterized in that: Each of the polishing support assemblies comprises a guide, a lifting member and a second driving device, one end of each of the guides is connected to the main support, and the other end of each of the guides extends in a direction perpendicular to the center line of the main support toward a direction away from the main support; each of the lifting members is slidably connected to the corresponding guides; Each of the second driving devices is connected to the corresponding lifting members, and each of the second driving devices can drive the corresponding lifting members to slide along the corresponding guide members and maintain their positions.

4. The tube inner wall grinding and polishing device according to claim 1, characterized in that: Each of the polishing assemblies includes at least three polishing bodies.

5. The tube inner wall grinding and polishing device according to claim 3, characterized in that: Each of the grinding and polishing components also includes a protective cover, and a plurality of the protective covers can be fixedly connected to the main support member in sequence along the length direction of the main support member; each of the grinding and polishing bodies of the grinding and polishing components is provided with one end of the grinding and polishing head arranged outside the corresponding protective covers, and the other end of each of the grinding and polishing bodies of the grinding and polishing components is fixedly connected inside the corresponding protective covers.

6. The tube inner wall grinding and polishing device according to claim 5, characterized in that: It also includes at least two control devices, which correspond to the grinding and polishing components one by one, and each of the control devices is signal-connected with each of the first driving devices and each of the second driving devices of the corresponding grinding and polishing components; each of the control devices can control the corresponding each of the first driving devices to be turned on or off; and each of the control devices can control the corresponding each of the second driving devices to be turned on or off.

7. The tube inner wall grinding and polishing device according to claim 6, characterized in that: Each of the first driving devices and each of the second driving devices is a motor, and each of the control devices can control the rotation speed of the corresponding each of the first driving devices and each of the second driving devices.

8. The tube inner wall grinding and polishing device according to claim 1, characterized in that: Each of the grinding and polishing assemblies also includes at least one locking piece, and each of the connecting plates is provided with a guide groove which penetrates each of the connecting plates in a direction perpendicular to the length of the main support member, and each of the first driving devices is sleeved in the corresponding guide groove; the locking piece can pass through the mounting holes of each of the first driving devices and the corresponding connecting plates in sequence from one end of each of the first driving devices away from the corresponding connecting plate, so that each of the first driving devices can be movably connected with the corresponding connecting plate; each of the first driving devices can move along the corresponding guide groove under the action of external force or the elastic force of the elastic component.

9. The tube inner wall grinding and polishing device according to claim 1, characterized in that: There are at least three grinding and polishing assemblies, each of the grinding and polishing heads of at least one of the grinding and polishing assemblies is a rough grinding head, each of the grinding and polishing heads of at least one of the grinding and polishing assemblies is a medium grinding head, and each of the grinding and polishing heads of at least one of the grinding and polishing assemblies is a fine grinding head.

10. A method for grinding and polishing the inner wall of a pipe based on the inner wall grinding and polishing device of any one of claims 1 to 9, characterized in that: The method comprises the following steps: making each polishing head of each polishing assembly contact with the inner wall of the pipe, moving the main support member along the axial direction of the pipe, and making the polishing heads of multiple polishing assemblies on the main support member polish the same pipe section with different polishing accuracies in turn; when each polishing head contacts with the inner wall of the pipe, each first driving device can move toward the main support member under the squeezing force of the inner wall of the pipe, or move toward the direction away from the main support member under the elastic force of the corresponding elastic member.

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