A polishing device

Abstract

The application discloses a polishing device and belongs to the technical field of polishing equipment. The polishing device comprises a fixing assembly, a connecting assembly and a polisher. The fixing assembly is used for fixing a pipe. The connecting assembly is rotatably connected with the fixing assembly. The polisher is installed on the connecting assembly and can rotate relative to the fixing assembly under the driving of the connecting assembly to adjust the angle of the polisher relative to a pipe opening. The fixing assembly fixes the pipe. The polisher is installed on the connecting assembly. The connecting assembly is rotatably connected with the fixing assembly. The angle of the polisher relative to the pipe opening can be adjusted through the connecting assembly, so that the polishing of the pipe opening with different slopes is realized, and the polishing precision of the pipe opening is improved.

Description

Technical Field

[0001] This application belongs to the field of polishing equipment technology, and particularly relates to a polishing device. Background Technology

[0002] Large-diameter pipe fittings are commonly used in construction. They are used to transport water, cement, or other materials needed for construction. Due to the limited length of large-diameter pipe fittings, multiple fittings need to be welded together to accommodate long-distance transport. Before welding, the pipe ends of the large-diameter pipe fittings need to be ground to facilitate welding. During the grinding process, different welding requirements necessitate different bevels at the pipe ends. Currently, the grinding of large-diameter pipe fitting ends is mainly done manually. Because of the large pipe ends and thick pipe walls, the grinding time is long, leading to numb hands and fatigue for workers, resulting in very high labor intensity. Furthermore, manual grinding can cause inconsistencies in the bevel of the ground surface, resulting in low grinding accuracy. Summary of the Invention

[0003] This application aims to at least partially solve the technical problem of poor grinding accuracy at the pipe ends of pipe fittings. To this end, this application provides a grinding apparatus.

[0004] In a first aspect, embodiments of this application provide a grinding device for grinding the opening of a pipe fitting, the grinding device comprising:

[0005] Fixing component, the fixing component being used to fix the pipe fitting;

[0006] A connecting component, which is rotatably connected to the fixing component;

[0007] A grinding machine, which is mounted on the connecting assembly and can rotate relative to the fixed assembly under the drive of the connecting assembly, so as to adjust the angle of the grinding machine relative to the pipe opening.

[0008] The fixing component secures the pipe fitting, and the grinder is mounted on the connecting component. The connecting component and the fixing component are rotatably connected. The angle of the grinder relative to the pipe opening can be adjusted through the connecting component, thereby achieving grinding of different slopes of the pipe opening and improving the grinding accuracy of the pipe opening.

[0009] In an optional embodiment of this application, the connecting component includes a first rotating part, and the fixing component includes a second rotating part, wherein the first rotating part and the second rotating part are rotatably connected.

[0010] In an optional embodiment of this application, the first rotating part is provided with a rotating groove, the second rotating part is a rotating shaft, and the rotating shaft and the rotating groove cooperate.

[0011] In an optional embodiment of this application, the connecting assembly includes a connecting plate, a first limiting plate, and a second limiting plate. The connecting plate is connected to the first rotating part, and the first limiting plate and the second limiting plate are spaced apart on the connecting plate. The grinding machine is installed between the first limiting plate and the second limiting plate.

[0012] In an optional embodiment of this application, the grinding machine includes a grinding head and a mounting base. The grinding head is mounted on one end of the mounting base, and the end of the mounting base away from the grinding head is mounted between the first limiting plate and the second limiting plate. The connecting assembly further includes a positioning plate, one end of which is connected to the connecting plate, and the other end of which is connected to the grinding head.

[0013] In an optional embodiment of this application, the fixing component includes a first fixing member, a second fixing member, and a connecting member. The first fixing member is connected to the second fixing member through the connecting member. The first fixing member is disposed on the inner side of the pipe, the second fixing member is disposed on the outer side of the pipe, the connecting member contacts the pipe opening, and the connecting component is rotatably connected to the second fixing member.

[0014] In an optional embodiment of this application, the connector includes a first connecting rod and a sleeve. The first connecting rod connects the first fixing member and the second fixing member. The sleeve is sleeved on the first connecting rod and is used to contact the pipe opening. When the grinding device moves relative to the pipe, the sleeve rotates relative to the pipe opening.

[0015] In an optional embodiment of this application, the first fixing member includes a first fixing rod, a first fixing plate, and a first fixing part. The first fixing rod is connected to the first fixing plate, the first fixing part is disposed on the first fixing plate, the first fixing rod is connected to the connecting member, and the first fixing part is used to contact the inner wall of the pipe.

[0016] In an optional embodiment of this application, the first fixing plate is provided with a first fixing groove, and the first fixing part is installed in the first fixing groove.

[0017] In an optional embodiment of this application, the shape of the first fixing groove is adapted to the shape of the pipe fitting.

[0018] In an optional embodiment of this application, the second fixing member includes a second fixing rod, a second fixing plate, and a second fixing part. The second fixing rod is connected to the second fixing plate, the second fixing part is disposed on the second fixing plate, the second fixing rod is connected to the connecting member, and the second fixing part is used to contact the outer wall of the pipe.

[0019] In an optional embodiment of this application, the second fixing plate is provided with a second fixing groove, and the second fixing part is installed in the second fixing groove.

[0020] In an optional embodiment of this application, the shape of the second fixing groove is adapted to the shape of the pipe fitting. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the structure of the grinding device provided in this application embodiment applied to pipe fittings is shown.

[0023] Figure 2 The grinding apparatus provided in the embodiments of this application is shown in Figure 1 A magnified view of section II in the middle.

[0024] Figure 3 A schematic diagram of the grinding apparatus provided in an embodiment of this application is shown.

[0025] Figure 4 A schematic diagram of the connection assembly of the grinding apparatus provided in an embodiment of this application is shown.

[0026] Figure 5 A schematic diagram of the structure of the first fastener of the fixing assembly of the grinding device provided in this application embodiment is shown.

[0027] Figure 6 A schematic diagram of the structure of the second fastener of the fixing assembly of the grinding device provided in this application embodiment is shown.

[0028] Reference numerals: 100-Grinding device, 110-Connecting assembly, 112-First rotating part, 113-Connecting plate, 114-First limiting plate, 115-Second limiting plate, 116-Locking component, 117-Positioning plate, 120-Fixing assembly, 122-Second rotating part, 123-First fixing component, 1232-First fixing rod, 1234-First fixing plate, 1236-First fixing part, 1238-First fixing groove, 124-Second fixing component, 1242-Second fixing rod, 1244-Second fixing plate, 1246-Second fixing part, 1248-Second fixing groove, 125-Connecting component, 1251-First connecting rod, 1253-Sleeve, 1255-Second connecting rod, 130-Grinding machine, 132-Grinding head, 134-Mounting base, 200-Pipe fitting, 210-Pipe opening. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0030] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0031] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0032] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0033] Large-diameter pipe fittings are commonly used in construction. They are used to transport water, cement, or other materials needed for construction. Due to the limited length of large-diameter pipe fittings, multiple fittings need to be welded together to accommodate long-distance transport. Before welding, the pipe ends of the large-diameter pipe fittings need to be ground to facilitate welding. Different welding requirements necessitate different bevels at the pipe ends during the grinding process. Currently, the grinding of large-diameter pipe ends is mainly done manually. Due to the large size of the pipe ends and the thick walls, the grinding time is long, leading to numbness in the hands and fatigue of the workers, resulting in very high labor intensity. Furthermore, manual grinding can cause inconsistencies in the bevel of the ground surface, resulting in low grinding accuracy. This application provides a grinding device that can automatically grind pipe ends and adjust the position between the grinding machine and the pipe end to improve grinding accuracy.

[0034] This application is described below with reference to the accompanying drawings and specific embodiments:

[0035] Please see Figure 1 and Figure 2 This application provides a grinding device 100, which is mainly used to grind the pipe opening 210 of a large-diameter pipe fitting 200. The grinding device 100 can automatically grind the pipe opening 210 and adjust the position between the grinding machine 130 and the pipe opening 210 to improve the grinding accuracy.

[0036] In this embodiment, the polishing device 100 includes:

[0037] Fixing component 120 is used to fix pipe fitting 200;

[0038] The connecting component 110 is rotatably connected to the fixing component 120;

[0039] The grinder 130 is mounted on the connecting assembly 110 and can rotate relative to the fixed assembly 120 under the drive of the connecting assembly 110 to adjust the angle of the grinder 130 relative to the nozzle 210.

[0040] In this embodiment, the fixing component secures the pipe 200, and the grinding machine 130 is mounted on the connecting component 110. The connecting component 110 is rotatably connected to the fixing component 120. The angle of the grinding machine 130 relative to the pipe opening 210 can be adjusted by the connecting component 110, thereby achieving grinding of the pipe opening 210 at different slopes and improving the grinding accuracy of the pipe opening 210.

[0041] In this embodiment, adjusting the angle of the grinder 130 relative to the pipe opening 210 via the connecting component 110 can be done by adjusting the angle of the grinder 130 relative to the pipe opening 210 when grinding the same pipe opening 210, or by adjusting the angle of the grinder 130 when grinding the same pipe opening 210, but by adjusting the angle differently when grinding the pipe openings 210 of different pipe fittings 200. This allows for continuous adjustment of the bevel angle of the grinder 130.

[0042] In this embodiment, the pipe opening 210 is polished by the polishing device 100, resulting in good bevel forming quality, smooth polished bevel, and consistent bevel angle, which reduces the occurrence of inconsistent bevel angles when manually polishing the same pipe opening 210.

[0043] The connecting component 110 and the fixing component 120 are rotatably fixed together. This means that during the grinding process of the grinding machine 130 grinding the pipe opening 210, the connecting component 110 and the fixing component 120 are fixed relative to each other. After grinding at the same slope is completed, the connecting component 110 is rotated relative to the fixing component 120 to adjust the angle of the grinding machine 130 relative to the pipe opening 210. Alternatively, the grinding machine 130 can be continuously in operation, and during the grinding process, the connecting component 110 can be controlled to rotate relative to the fixing component 120, thereby adjusting the angle of the grinding machine 130 relative to the pipe opening 210.

[0044] Please see Figure 3 and Figure 4 In this embodiment, the connecting component 110 includes a first rotating part 112, and the fixing component 120 includes a second rotating part 122. The first rotating part 112 and the second rotating part 122 are rotatably connected.

[0045] In this embodiment, the first rotating part 112 and the second rotating part 122 rotate in conjunction to achieve a rotatable connection between the fixing component 120 and the connecting component 110.

[0046] In this embodiment, the first rotating part 112 is provided with a rotating groove, and the second rotating part 122 is a rotating shaft, with the rotating shaft and the rotating groove cooperating.

[0047] The rotating shaft is installed in the rotating groove, and the rotational engagement between the connecting component 110 and the fixing component 120 is achieved through the cooperation of the rotating shaft and the rotating groove.

[0048] It is easy to understand that in this embodiment, a rotation groove is provided on the first rotating part 112 and the second rotating part 122 is a rotating shaft. However, it is not limited to this. In other embodiments of this application, the first rotating part 112 may be a rotating shaft and the second rotating part 122 may be provided with a rotation groove.

[0049] In this embodiment, when the rotating shaft extends into the rotating groove, the rotating groove and the rotating shaft can be fixed by means of bolts or other connection methods, so that the angle between the grinder 130 and the pipe opening 210 is fixed, thereby avoiding the grinder 130 from shaking due to unstable fixing when grinding the pipe opening 210, and improving the stability of grinding.

[0050] In this embodiment, the connecting assembly 110 includes a connecting plate 113, a first limiting plate 114, and a second limiting plate 115. The connecting plate 113 is connected to the first rotating part 112. The first limiting plate 114 and the second limiting plate 115 are spaced apart on the connecting plate 113. The grinding machine 130 is installed between the first limiting plate 114 and the second limiting plate 115.

[0051] The grinding machine 130 is installed in the gap between the first limiting plate 114 and the second limiting plate 115, which can limit the grinding machine 130 and prevent the grinding machine 130 from shaking due to the reaction force of the pipe opening 210 during the grinding process, which would cause the grinding machine 130 to loosen and cause grinding problems.

[0052] In this embodiment, the connecting assembly 110 further includes a locking member 116, which is connected to the ends of the first limiting plate 114 and the second limiting plate 115 away from the connecting plate 113. The first limiting plate 114 and the second limiting plate 115 are relatively soft. The locking member 116 is connected to the ends of the first limiting plate 114 and the second limiting plate 115 away from the connecting plate 113, which can adjust the gap between the ends of the first limiting plate 114 and the second limiting plate 115 away from the connecting plate 113, so that the first limiting plate 114 and the second limiting plate 115 can clamp the grinder 130 and reduce the shaking of the grinder 130 during operation.

[0053] In this embodiment, the grinding machine 130 includes a grinding head 132 and a mounting base 134. The grinding head 132 is mounted on one end of the mounting base 134, and the end of the mounting base 134 away from the grinding head 132 is mounted between the first limiting plate 114 and the second limiting plate 115. The connecting assembly 110 also includes a positioning plate 117, one end of which is connected to the connecting plate 113, and the other end of which is connected to the grinding head 132.

[0054] The grinding head 132 is used to grind the pipe opening 210. The mounting base 134 is set between the first limiting plate 114 and the second limiting plate 115. The grinding head 132 is relatively heavy. In order to reduce the vertical vibration of the grinding head 132 during the grinding process, a positioning plate 117 is added. One end of the positioning plate 117 is connected to the connecting plate 113, and the other end is connected to the grinding head 132. It can limit the grinding head 132 and improve the stability of the grinding machine 130 during the working process.

[0055] In this embodiment, the fixing component 120 includes a first fixing member 123, a second fixing member 124, and a connecting member 125. The first fixing member 123 is connected to the second fixing member 124 through the connecting member 125. The first fixing member 123 is disposed on the inner side of the pipe 200, the second fixing member 124 is disposed on the outer side of the pipe 200, the connecting member 125 contacts the pipe opening 210, and the connecting component 110 is rotatably connected to the second fixing member 124.

[0056] In this embodiment, the first fixing member 123 and the second fixing member 124 are respectively disposed on both sides of the pipe wall of the pipe 200, fixing the pipe 200 from both sides. The connector 125 serves to connect the first fixing member 123 and the second fixing member 124, so that the first fixing member 123 and the second fixing member 124 can form a whole through the connector 125, which facilitates the installation of the grinding device 100.

[0057] The first fixing member 123 and the second fixing member 124 are respectively disposed on the inner and outer sides of the pipe wall, clamping the pipe wall from both sides, reducing the radial movement of the grinding machine 130 in the pipe fitting 200 during the grinding process of the grinding machine 130 at the pipe opening 210, and improving the stability of the grinding machine 130.

[0058] In this embodiment, the connector 125 includes a first connecting rod 1251 and a sleeve 1253. The first connecting rod 1251 connects the first fixing member 123 and the second fixing member 124. The sleeve 1253 is sleeved on the first connecting rod 1251 and is used to contact the pipe opening 210. When the grinding device 100 moves relative to the pipe 200, the sleeve 1253 rotates relative to the pipe opening 210.

[0059] The sleeve 1253 is fitted onto the first connecting rod 1251. When the entire grinding device 100 moves relative to the pipe opening 210, the sleeve 1253 rotates relative to the pipe opening 210, converting sliding friction into rotational friction, thereby reducing the friction between the entire fixed assembly 120 and the pipe opening 210, which facilitates the grinding of the entire pipe opening 210.

[0060] The first connecting rod 1251 and sleeve 1253 are mainly used to contact the nozzle 210, so that the weight of the entire grinding device 100 is transferred to the nozzle 210, and the weight of the entire grinding device 100 is pressed onto the nozzle 210, thereby increasing the contact pressure between the nozzle 210 and the grinding device 100, thus facilitating grinding.

[0061] In this embodiment, the connector 125 further includes a second connecting rod 1255, which is disposed above the first connecting rod 1251 and connects the first fixing member 123 and the second fixing member 124.

[0062] Since the first fixing member 123 and the second fixing member 124 are relatively high, and the first connecting rod 1251 and the sleeve 1253 are connected to the pipe opening 210, in order to prevent the first fixing member 123 and the second fixing member 124 from shaking, a second connecting rod 1255 is provided above the first connecting rod 1251 to fix the first fixing member 123 and the second fixing member 124.

[0063] In this embodiment, the first connecting rod 1251 and the second connecting rod 1255 can be fixed to the first fixing member 123 and the second fixing member 124 respectively by bolts.

[0064] In this embodiment, in order to improve the stability of the first fixing member 123 and the second fixing member 124, multiple connecting members 125 can be provided, and multiple connecting rods can be used to fix the first fixing member 123 and the second fixing member 124 from different positions.

[0065] Please see Figure 5 In this embodiment, the first fixing member 123 includes a first fixing rod 1232, a first fixing plate 1234 and a first fixing part 1236. The first fixing rod 1232 is connected to the first fixing plate 1234, the first fixing part 1236 is disposed on the first fixing plate 1234, the first fixing rod 1232 is connected to the connector 125, and the first fixing part 1236 is used to contact the inner wall of the pipe fitting 200.

[0066] In this embodiment, the connector 125 is connected to the first fixing rod 1232, the first fixing plate 1234 is disposed below the first fixing rod 1232, and there can be multiple first fixing parts 1236, all of which are disposed on the first fixing plate 1234. The first fixing parts 1236 contact the inner wall and can fix the pipe 200 from the inside, reducing the mutual shaking between the pipe 200 and the grinding device 100 during the grinding process.

[0067] The first fixing part 1236 can be an adjustable bearing, allowing it to rotate relative to the pipe wall. During the movement of the grinding device 100 relative to the pipe opening 210, sliding friction can be converted into rotational friction, facilitating the movement of the grinding device 100 relative to the pipe fitting 200 and thus facilitating the grinding of the entire pipe opening 210. Because the rotational friction is relatively small, during the grinding process, only one operator needs to drag the entire grinding device 100 to grind the entire pipe opening 210.

[0068] In this embodiment, the distance between the multiple first fixing parts 1236 can be adjusted to accommodate the grinding of the pipe opening 210 of pipe fittings 200 with different diameters.

[0069] In this embodiment, the first fixing plate 1234 is provided with a first fixing groove 1238, and the first fixing part 1236 is installed in the first fixing groove 1238.

[0070] The device includes multiple first fixing parts 1236, all of which are installed within the first fixing groove 1238, facilitating their installation and fixation. The multiple first fixing parts 1236 are sequentially and alternately installed within the first fixing groove 1238.

[0071] In this embodiment, the shape of the first fixing groove 1238 is adapted to the shape of the pipe fitting 200.

[0072] The shape of the first fixing groove 1238 is adapted to the shape of the pipe wall. Since the pipe wall is arc-shaped, the first fixing groove 1238 is also arc-shaped. The relative positions of the multiple first fixing parts 1236 on the first fixing groove 1238 can be adjusted so that the shape of the line connecting the multiple first fixing parts 1236 can be adapted to the shape of the pipe wall, thereby improving the fixing effect on the pipe wall.

[0073] Please see Figure 6 In this embodiment, the second fixing member 124 includes a second fixing rod 1242, a second fixing plate 1244, and a second fixing part 1246. The second fixing rod 1242 is connected to the second fixing plate 1244, the second fixing part 1246 is disposed on the second fixing plate 1244, the second fixing rod 1242 is connected to the connector 125, and the second fixing part 1246 is used to contact the outer wall of the pipe fitting 200.

[0074] In this embodiment, the connector 125 is connected to the second fixing rod 1242, the second fixing plate 1244 is disposed below the second fixing rod 1242, and there can be multiple second fixing parts 1246, all of which are disposed on the second fixing plate 1244. The second fixing parts 1246 contact the outer wall and can fix the pipe 200 from the outside, reducing the mutual shaking between the pipe 200 and the grinding device 100 during the grinding process.

[0075] The second fixing part 1246 can be an adjusting bearing, so that the second fixing part 1246 can rotate relative to the pipe wall. During the process of the grinding device 100 moving relative to the pipe opening 210, the sliding friction force can be converted into rotational friction force, which can facilitate the movement of the grinding device 100 relative to the pipe 200, thereby facilitating the grinding of the entire pipe opening 210.

[0076] In this embodiment, the second fixing plate 1244 is provided with a second fixing groove 1248, and the second fixing part 1246 is installed in the second fixing groove 1248.

[0077] The device includes multiple second fixing parts 1246, all of which are installed within the second fixing grooves 1248, facilitating their installation and fixation. The multiple second fixing parts 1246 are sequentially and alternately installed within the second fixing grooves 1248.

[0078] In this embodiment, the distance between the multiple second fixing parts 1246 can be adjusted to accommodate the grinding of the pipe opening 210 of pipe fittings 200 with different diameters.

[0079] In this embodiment, the shape of the second fixing groove 1248 is adapted to the shape of the pipe fitting 200.

[0080] The shape of the second fixing groove 1248 is adapted to the shape of the pipe wall. Since the pipe wall is arc-shaped, the second fixing groove 1248 is also arc-shaped. The relative positions of the multiple second fixing parts 1246 on the second fixing groove 1248 can be adjusted so that the shape of the line connecting the multiple second fixing parts 1246 can be adapted to the shape of the pipe wall, thereby improving the fixing effect on the pipe wall.

[0081] In summary, the grinding device 100 provided in this embodiment has a fixing component that secures the pipe 200, and a grinding machine 130 that is mounted on a connecting component 110. The connecting component 110 is rotatably connected to the fixing component 120. The angle of the grinding machine 130 relative to the pipe opening 210 can be adjusted by the connecting component 110, thereby achieving grinding of the pipe opening 210 at different slopes and improving the grinding accuracy of the pipe opening 210.

[0082] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

Claims

1. A grinding device for grinding the end of a pipe fitting, characterized in that, The polishing device includes: Fixing component, the fixing component being used to fix the pipe fitting; A connecting component, which is rotatably connected to the fixing component; The connecting assembly includes a first rotating part, a connecting plate, a first limiting plate, and a second limiting plate. The connecting plate is connected to the first rotating part, and the first limiting plate and the second limiting plate are spaced apart on the connecting plate. The fixing assembly includes a second rotating part, a first fixing member, a second fixing member, and a connecting member. The first fixing member is connected to the second fixing member through the connecting member. The first fixing member is disposed on the inner side of the pipe, the second fixing member is disposed on the outer side of the pipe, and the connecting member contacts the pipe opening. The connecting assembly is rotatably connected to the second fixing member; A grinding machine is installed between the first limiting plate and the second limiting plate, and can rotate relative to the fixed component under the drive of the connecting component to adjust the angle of the grinding machine relative to the pipe opening.

2. The polishing device according to claim 1, characterized in that, The grinding machine includes a grinding head and a mounting base. The grinding head is mounted on one end of the mounting base, and the end of the mounting base away from the grinding head is mounted between the first limiting plate and the second limiting plate. The connecting assembly also includes a positioning plate, one end of which is connected to the connecting plate, and the other end of which is connected to the grinding head.

3. The polishing apparatus according to claim 1 or 2, characterized in that, The connector includes a first connecting rod and a sleeve. The first connecting rod connects the first fixing member and the second fixing member. The sleeve is sleeved on the first connecting rod and is used to contact the pipe opening. When the grinding device moves relative to the pipe, the sleeve rotates relative to the pipe opening.

4. The polishing apparatus according to claim 1 or 2, characterized in that, The first fixing member includes a first fixing rod, a first fixing plate, and a first fixing part. The first fixing rod is connected to the first fixing plate, the first fixing part is disposed on the first fixing plate, the first fixing rod is connected to the connecting member, and the first fixing part is used to contact the inner wall of the pipe.

5. The polishing apparatus according to claim 4, characterized in that, The first fixing plate is provided with a first fixing groove, and the first fixing part is installed in the first fixing groove.

6. The polishing apparatus according to claim 1 or 2, characterized in that, The second fixing member includes a second fixing rod, a second fixing plate, and a second fixing part. The second fixing rod is connected to the second fixing plate, the second fixing part is disposed on the second fixing plate, the second fixing rod is connected to the connecting member, and the second fixing part is used to contact the outer wall of the pipe.

7. The polishing apparatus according to claim 6, characterized in that, The second fixing plate is provided with a second fixing groove, and the second fixing part is installed in the second fixing groove.

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